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Projected Changes in the Climate Zoning of Côte d’Ivoire
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作者 Mamadou Diarrassouba Adama Diawara +6 位作者 Assi Louis Martial Yapo Benjamin Komenan Kouassi Fidèle Yoroba Kouakou Kouadio Dro Touré Tiemoko Dianikoura Ibrahim Koné Arona Diedhiou 《Atmospheric and Climate Sciences》 2024年第1期62-84,共23页
This study assesses the projected changes in the climate zoning of Côte d’Ivoire using the hierarchical classification of principal components (HCPC) method applied to the daily precipitation data of an ensemble... This study assesses the projected changes in the climate zoning of Côte d’Ivoire using the hierarchical classification of principal components (HCPC) method applied to the daily precipitation data of an ensemble of 14 CORDEX-AFRICA simulations under RCP4.5 and RCP8.5 scenarios. The results indicate the existence of three climate zones in Côte d’Ivoire (the coastal, the centre and the north) over the historical period (1981-2005). Moreover, CORDEX simulations project an extension of the surface area of drier climatic zones while a reduction of wetter zones, associated with the appearance of an intermediate climate zone with surface area varying from 77,560 km<sup>2</sup> to 134,960 km<sup>2</sup> depending on the period and the scenario. These results highlight the potential impacts of climate change on the delimitation of the climate zones of Côte d’Ivoire under the greenhouse gas emission scenarios. Thus, there is a reduction in the surface areas suitable for the production of cash crops such as cocoa and coffee. This could hinder the country’s economy and development, mainly based on these cash crops. 展开更多
关键词 climate Projection climate zone Principal Component Analysis Hierarchical Classification on Principal Components CORDEX Côte d’Ivoire
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Spatiotemporal Evolution Characteristics of Urban Land Surface Temperature Based on Local Climate Zones in Xi’an Metropolitan,China
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作者 ZHANG Liping ZHOU Liang +4 位作者 YUAN Bo HU Fengning ZHANG Qian WEI Wei SUN Dongqi 《Chinese Geographical Science》 SCIE CSCD 2023年第6期1001-1016,共16页
Local climate zones(LCZs)are an effective nexus linking internal urban structures to the local climate and have been widely used to study urban thermal environment.However,few studies considered how much the temperatu... Local climate zones(LCZs)are an effective nexus linking internal urban structures to the local climate and have been widely used to study urban thermal environment.However,few studies considered how much the temperature changed due to LCZs transformation and their synergy.This paper quantified the change of urban land surface temperature(LST)in LCZs transformation process by combining the land use transfer matrix with zonal statistics method during 2000–2019 in the Xi’an metropolitan.The results show that,firstly,both LCZs and LST had significant spatiotemporal variations and synchrony.The period when the most LCZs were converted was also the LST rose the fastest,and the spatial growth of the LST coincided with the spatial expansion of the built type LCZs.Secondly,the LST difference between land cover type LCZs and built type LCZs gradually widened.And LST rose more in both built type LCZs transferred in and out.Finally,the Xi’an-Xianyang profile showed that the maximum temperature difference between the peaks and valleys of the LST increased by 4.39℃,indicating that localized high temperature phenomena and fluctuations in the urban thermal environment became more pronounced from 2000 to 2019. 展开更多
关键词 urban land surface temperature(LST) local climate zones(LCZs) thermal environment time series urban sustainable development Xi’an metropolitan China
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Variations in Surface Urban Heat Island and Urban Cool Island Intensity:A Review Across Major Climate Zones
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作者 Muhammad Sadiq KHAN Sami ULLAH CHEN Liding 《Chinese Geographical Science》 SCIE CSCD 2023年第6期983-1000,共18页
The climate has an impact on the urban thermal environment,and the magnitude of the surface urban heat island(SUHI)and urban cool island(UCI)vary across the world’s climatic zones.This literature review investigated:... The climate has an impact on the urban thermal environment,and the magnitude of the surface urban heat island(SUHI)and urban cool island(UCI)vary across the world’s climatic zones.This literature review investigated:1)the variations in the SUHI and UCI intensity under different climatic backgrounds,and 2)the effect of vegetation types,landscape composition,urban configuration,and water bodies on the SUHI.The SUHI had a higher intensity in tropical(Af(tropical rainy climate,Köppen climate classification),Am(tropical monsoon climate),subtropical(Cfa,subtropical humid climate),and humid continental(Dwa,semi-humid and semi-arid monsoon climate)climate zones.The magnitude of the UCI was low compared to the SUHI across the climate zones.The cool and dry Mediterranean(Cfb,temperate marine climate;Csb,temperate mediterranean climate;Cfa)and tropical climate(Af)areas had a higher cooling intensity.For cities with a desert climate(BWh,tropical desert climate),a reverse pattern was found.The difference in the SUHI in the night-time was greater than in the daytime for most cities across the climate zones.The extent of green space cooling was related to city size,the adjacent impervious surface,and the local climate.Additionally,the composition of urban landscape elements was more significant than their configuration for sustaining the urban thermal environment.Finally,we identified future research gaps for possible solutions in the context of sustainable urbanization in different climate zones. 展开更多
关键词 urban heat island intensity(SUHI) urban cool island intensity(UCI) day-night surface urban heat island(SUHI) climate zones landscape composition and configuration sustainable urbanization
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Numerical Experiments for the influence of the Transition Zone Migration on Summer Climate in North China 被引量:1
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作者 郑维忠 倪允琪 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 1999年第3期367-377,共11页
As the position of the transition zone changes obviously, that is, as the transition zone migrates to thenorth or the south from present position, it affects water or heat balance between the land and the atmosphere i... As the position of the transition zone changes obviously, that is, as the transition zone migrates to thenorth or the south from present position, it affects water or heat balance between the land and the atmosphere in a considerable degree and has a profound influence on climate in North China. The experiment results in this paper indicate whether in the dry case or in the wet case of the large-scale climatological background field, the surface air temperature in a wide range of the transition zone migration and its surrounding decreases as the transition zone migrates northward. Moreover, the net upward fluxes of the surface long wave l.adiation and the sensible heat decrease, and the evaporation to the atmosphere increases. Asthe transition zone migrates southward, the results are opPOsite. This kind of significant thermal forcing between the land and the atmosphere can excite secondary circulation or circulation cells, which interact withthe large-scale circulation systems, changing the atmospheric motion, affecting the water vapor transPOrtation and consequently having an effect on the precipitation. 展开更多
关键词 Transition zone MIGRATION Water and heat BALANCE climate in NORTH China Numerical simulation
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Impacts of Changing Climate on Maize Production in the Transitional Zone of Ghana 被引量:2
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作者 Victor Adjei Rosina Kyerematen 《American Journal of Climate Change》 2018年第3期463-476,共14页
This study sought to assess the challenges and opportunities that come with climate change and variability impacts on maize farming in the Nkoranza South Municipality in the Transitional Zone of Ghana. The mixed metho... This study sought to assess the challenges and opportunities that come with climate change and variability impacts on maize farming in the Nkoranza South Municipality in the Transitional Zone of Ghana. The mixed method approach (qualitative and quantitative) was used in collecting the data. Rainfall data obtained from the Ghana Meteorological Agency (GMet) indicated that the dry cell between the major and minor rainy seasons was getting wetter and the two seasons were gradually merging whereas the first and last quarters of the year were getting drier over the last couple of decades. The situation over the last five years (2010-2015) had worsened as the amount of total rainfall had reduced by 22% compared to the 30 year period between 1960 and 1982. The results of the study showed that farmers had perceived changes in climate in the form of decreasing rainfall, rising air temperatures and seasonal changes in rainfall pattern which were affecting their maize farming operations. The major setbacks within the area were deficit in rainy days and intermittent erratic rainfall affecting maize production. The major opportunity available to farmers in the face of changing climate in this agroecological zone was cashew production. About 76.8% of the respondents had diversified into cashew farming as a result of rainfall failure and strong resistance of the cashew trees to changing and variable climate. 展开更多
关键词 climate Change VARIABILITY MAIZE Production Transitional zone CASHEW FARMING
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Analysis of Climate Change in the Coastal Zone of Eastern China, against the Background of Global Climate Change over the Last Fifty Years: Case Study of Shandong Peninsula, China 被引量:2
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作者 Qing Tian Qing Wang +2 位作者 Chao Zhan Xiguo Li Xueping Liu 《International Journal of Geosciences》 2012年第2期379-390,共12页
The climate change in Shandong Peninsula, China was analyzed in this paper by the non-parametric Mann-Kendall test, Accumulated Difference Curve and Order Cluster Analysis methods, based upon the datas of annual mean,... The climate change in Shandong Peninsula, China was analyzed in this paper by the non-parametric Mann-Kendall test, Accumulated Difference Curve and Order Cluster Analysis methods, based upon the datas of annual mean, maximum and minimum temperature and annual precipitation, precipitation from June to September over the past 50 years. Results obtained showed a number of observations: 1) The annual mean temperature of Shandong Peninsula showed a significant increasing trend, with a distinct abrupt change point detected around 1990, during the past 5 decades. The warming of the Peninsula over the last 50 years was due mainly to the significant increase of annual minimum temperature. The annual maximum temperature demonstrated a mixed trend of decreasing and increasing, but was statistically insignificant, and no abrupt change was detected;2) The annual precipitation exhibited a decreasing trend during the past 5 decades, with an abrupt change detected around 1980 at most stations;but there was an earlier transition point at 1966, at a few stations. The reduction in precipitation, from June to September, was responsible mainly for the decrease of annual precipitation. Besides, the proportion of the June-September precipitation in the year declined slightly over the last 50 years;3) In comparison, the temperature evolution in Shandong Peninsula was basically consistent with most parts of China, but warmed at a faster rate over the same period;the decreasing trend of precipitation was more significant compared with the other climate zones of China. Within the Peninsula, the abrupt change of temperature and precipitation in the Southeast was earlier than that in the Northwest;the reduction of precipitation was larger in the Southeast while the increase of temperature was more significant in the Northwest. This research was of great importance to understand the climate change and its environmental effects in the coastal zone. 展开更多
关键词 ABRUPT CHANGE climate CHANGE SHANDONG PENINSULA in China The LAST Fifty YEARS Coastal zone
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An Overview of Dry-wet Climate Variability among Monsoon-Westerly Regions and the Monsoon Northernmost Marginal Active Zone in China 被引量:23
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作者 钱维宏 丁婷 +2 位作者 胡豪然 林祥 秦爱民 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2009年第4期630-641,共12页
Climate in China's Mainland can be divided into the monsoon region in the southeast and the westerly region in the northwest as well as the intercross zone,i.e.,the monsoon northernmost marginal active zone that i... Climate in China's Mainland can be divided into the monsoon region in the southeast and the westerly region in the northwest as well as the intercross zone,i.e.,the monsoon northernmost marginal active zone that is oriented from Southwest China to the upper Yellow River,North China,and Northeast China.In the three regions,dry-wet climate changes are directly linked to the interaction of the southerly monsoon flow on the east side of the Tibetan Plateau and the westerly flow on the north side of the Plateau from the inter-annual to inter-decadal timescales.Some basic features of climate variability in the three regions for the last half century and the historical hundreds of years are reviewed in this paper. In the last half century,an increasing trend of summer precipitation associated with the enhancing west- erly flow is found in the westerly region from Xinjiang to northern parts of North China and Northeast China. On the other hand,an increasing trend of summer precipitation along the Yangtze River and a decreasing trend of summer precipitation along the monsoon northernmost marginal active zone are associated with the weakening monsoon flow in East Asia. Historical documents are widely distributed in the monsoon region for hundreds of years and natural climate proxies are constructed in the non-monsoon region,while two types of climate proxies can be com- monly found over the monsoon northernmost marginal active zone.In the monsoon region,dry-wet variation centers are altered among North China,the lower Yangtze River,and South China from one century to an- other.Dry or wet anomalies are firstly observed along the monsoon northernmost marginal active zone and shifted southward or southeastward to the Yangtze River valley and South China in about a 70-year timescale.Severe drought events are experienced along the monsoon northernmost marginal active zone during the last 5 centuries.Inter-decadal dry-wet variations are depicted by natural proxies for the last 4–5 centuries in several areas over the non-monsoon region. Some questions,such as the impact of global warming on dry-wet regime changes in China,complex interactions between the monsoon and westerly flows in Northeast China,and the integrated multi-proxy analysis throughout all of China,are proposed. 展开更多
关键词 气候 季风 中国 大气科学
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Impact of Wetland Change on Local Climate in Semi-arid Zone of Northeast China 被引量:3
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作者 LIU Yan SHENG Lianxi LIU Jiping 《Chinese Geographical Science》 SCIE CSCD 2015年第3期309-320,共12页
Wetlands are sensitive to climate change, in the same time, wetlands can influence climate. This study analyzed the spatio-temporal characteristics of wetland change in the semi-arid zone of Northeast China from 1985 ... Wetlands are sensitive to climate change, in the same time, wetlands can influence climate. This study analyzed the spatio-temporal characteristics of wetland change in the semi-arid zone of Northeast China from 1985 to 2010, and investigated the impact of large area of wetland change on local climate. Results showed that the total area of wetlands was on a rise in the study area. Although natural wetlands(marshes, riparians and lakes) decreased, constructed wetlands(rice fields) increased significantly, and the highest increase rate in many places exceeded 30%. Anthropogenic activities are major driving factors for wetland change. Wetland change produced an impact on local climate, mainly on maximum temperature and precipitation during the period of May–September. The increase(or decrease) of wetland area could reduce(or increase) the increment of maximum temperature and the decrement of precipitation. The changes in both maximum temperature and precipitation corresponded with wetland change in spatial distribution. Wetland change played a more important role in moderating local climate compared to the contribution of woodland and grassland changes in the study area. Cold-humid effect of wetlands was main way to moderating local climate as well as alleviating climatic warming and drying in the study area, and heterogeneity of underlying surface broadened the cold-humid effect of wetlands. 展开更多
关键词 中国东北地区 湿地变化 半干旱地区 气候影响 气候变化 湿地面积 时间特征 最高温度
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Boundary Shift of Potential Suitable Agricultural Area in Farming-grazing Transitional Zone in Northeastern China under Background of Climate Change During 20th Century 被引量:3
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作者 YE Yu FANG Xiuqi 《Chinese Geographical Science》 SCIE CSCD 2013年第6期655-665,共11页
Climate change affected the agricultural expansion and the formation of farming-grazing transitional patterns during historical periods.This study analyzed the possible range of the boundary shift of the potential sui... Climate change affected the agricultural expansion and the formation of farming-grazing transitional patterns during historical periods.This study analyzed the possible range of the boundary shift of the potential suitable agriculture area in the farming-grazing transitional zone in the northeastern China during the 20th century.Based on modern weather data,1 km-resolution land cover data,historical climatic time series,and estimation by using similar historical climatic scenes,the following was concluded:1)The climate conditions of suitable agriculture areas in the farming-grazing transitional zone in the northeastern China between 1971 and 2000 required an average annual temperature above 1℃or≥0℃accumulated temperature above 2500℃–2700℃,and annual precipitation above 350 mm.2)The northern boundary of the potential suitable agriculture area during the relatively warmer period of 1890–1910was approximately located at the position of the 1961–2000 area.The northern boundary shifted back to the south by 75 km on average during the colder period of the earlier 20th century,whereas during the modern warm period of the 1990s,the area shifted north by 100km on average.3)The western and eastern boundaries of the suitable agriculture area during the heaviest drought periods between1920s and 1930s had shifted northeast by 250 km and 125 km,respectively,contrasting to the boundaries of 1951–2008.For the wettest period,that is,the 1890s to the 1910s,the shift of western and eastern boundaries was to the southwest by 125 km and 200 km,respectively,compared with that in the 1951–2008 period.This study serves as a reference for identifying a climatically sensitive area and planning future land use and agricultural production in the study area. 展开更多
关键词 中国东北地区 气候变化影响 边界位移 农业区 过渡带 农牧交错区 历史气候 土地利用
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CHARACTERISTICS OF CLIMATE WARMING AND IMPACT ON CLIMATE ZONES CHANGE IN GUANGDONG 被引量:1
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作者 陈新光 钱光明 +2 位作者 陈特固 李春梅 余克服 《Journal of Tropical Meteorology》 SCIE 2007年第1期61-64,共4页
Based on temperature data in Guangdong in the past 50years, statistical methods are used to analyze the characteristics of temperature in spatial and temporal variation. The results show that land surface temperature ... Based on temperature data in Guangdong in the past 50years, statistical methods are used to analyze the characteristics of temperature in spatial and temporal variation. The results show that land surface temperature warms by 0.16 °C/10a in Guangdong. The range of warming was lower than the average of nationwide and global land surface. Furthermore, the temperature has a larger increase tendency in winter and spring and coastal areas than in summer and autumn and inland areas. Climate zones move towards the north obviously. North tropical zone is expanding, south subtropical zone is reducing and central subtropical zone is relatively stable. Under the global climate warming, characteristics of climate warming in Guangdong were influenced by atmosphere general circulation, sea surface temperature and human activities etc. 展开更多
关键词 气候位移 温度 广东 气候变化
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Possible effect of climate changes on the coastal zone of the Yangtze River Delta
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作者 Miao Qilong Nanjing Institute of Meteorology, Nanjing 210044, CHINA 《Journal of Geographical Sciences》 SCIE CSCD 1998年第1期42-51,共10页
PosibleefectofclimatechangesonthecoastalzoneoftheYangtzeRiverDeltaMiaoQilongNanjingInstituteofMeteorology,N... PosibleefectofclimatechangesonthecoastalzoneoftheYangtzeRiverDeltaMiaoQilongNanjingInstituteofMeteorology,Nanjing210044,CHIN... 展开更多
关键词 climate change greenhouse effect sea surface rising the YANGTZE RIVER DELTA COASTAL zone
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Comparative study of surface energy and land-surface parameters in different climate zones in Northwest China
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作者 JiaXi Yang ZhenChao Li +4 位作者 Ye Yu ZhiYuan Zheng XuHong Hou XiaoQing Gao 《Research in Cold and Arid Regions》 CSCD 2019年第4期283-294,共12页
Based on observational data of arid,semi-arid and semi-humid areas in Northwest China,the characteristics of surface-wa ter heat transfer and land-surface parameters were compared and analyzed.The results show that th... Based on observational data of arid,semi-arid and semi-humid areas in Northwest China,the characteristics of surface-wa ter heat transfer and land-surface parameters were compared and analyzed.The results show that the annual mean net radi ation was largest in the semi-humid area,followed by the semi-arid area,and then the arid area:77.72 W/m^2,67.73 W/m^2,and 55.47 W/m^2,respectively.The annual mean sensible heat flux was largest in the arid area,followed by the semi-arid and semi-humid areas,while latent heat flux showed the reverse.The annual mean sensible heat flux in arid,semi-arid,and semi-humid areas was 85.7 W/m^2,37.59 W/m^2,and 27.55 W/m^2,respectively.The annual mean latent heat flux was 0 W/m^2,26.08 W/m^2,and 51.19 W/m2,respectively.The annual mean soil-heat flux at the 5-cm soil layer in arid,semi-arid,and semi-humid areas was 1.00 W/m^2,0.82 W/m^2,and 1.25 W/m^2,respectively.The annual mean surface albedo was larg est in the arid area,followed by the semi-humid area;and the smallest was in the semi-arid area:0.24,0.21,and 0.18,re spectively.The annual mean Bowen ratio in the semi-arid area was about 2.06,and that in semi-humid area was about 0.03.The annual mean soil thermal conductivity in the arid,semi-arid,and semi-humid areas was 0.26 W/(m k),1.15 W/(m k),and 1.20 W/(m k),respectively. 展开更多
关键词 surface energy LAND-SURFACE PARAMETERS DIFFERENT climate zoneS NORTHWEST China
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Clustering Analysis of the Climate in Tobacco Planting Zone of Yunnan
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作者 JIN Ya-bo QU Ran +1 位作者 LI Tian-fu WEI Jian-yu 《Meteorological and Environmental Research》 CAS 2012年第12期77-84,共8页
[Objective] The research aimed to study clustering of the six climatic factors in Yunnan tobacco planting zone. [Method] 6 meteorological elements in 89 tobacco-growing counties and 12 sub-prefectures were conducted c... [Objective] The research aimed to study clustering of the six climatic factors in Yunnan tobacco planting zone. [Method] 6 meteorological elements in 89 tobacco-growing counties and 12 sub-prefectures were conducted clustering analysis. According to indicator and climate characteristics of the each type, climate in tobacco planting area of Yunnan Province was divided. [Result] Climate in tobacco planting area of Yunnan Province could be divided into eight types: Jiangchuan (24 counties, belonged to northern and central subtropical climate belts), Songming (27 counties, belonged to northern subtropical and central, south, north temperate climate belts), Tengchong (3 counties, belonged to northern subtropical climate belt), Mile (12 counties, belonged to central and southern subtropical climate belts), Qiubei (11 counties, belonged to southern subtropical climate belt), Yanjin (4 counties, belonged to central subtropical humid climate belt), Yuanjiang (4 counties, belonged to southern subtropical and northern tropical climate belts), Zhenxiong (3 counties, belonged to warm temperate and northern subtropical climate belts) were eight representatives. Among 1-8 eco-zones, domestic and foreign cities where climate reached level-one similarity were respectively 3, 1, 1, 0, 1, 1, 0 and 1, up to level-two similarity, respectively 12, 15, 3, 13, 13, 1, 5 and 3. Among 8 major ecological zones, similar distance of the city reaching level-one similarity was in the range of 0.28 to 0.45, and similar degree was the highest. Variety introduction among these places would be successful. Similar distance of the city reaching level-two similarity was between 0.51 and 1.00, and similar degree was higher. Mutual variety introduction had high successful rate in these places. [Conclusion] The research provided theoretical basis for selecting new suitable tobacco variety and optimizing tobacco variety layout in different zones. 展开更多
关键词 TOBACCO GROWING area System clustering climatIC ZONING YUNNAN China
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Selection of Heat Recovery Ventilators in Different Climate Zones of China 被引量:1
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作者 钟珂 赵敬德 刘加平 《Journal of Donghua University(English Edition)》 EI CAS 2007年第1期79-84,共6页
Considering four different climate zones in China, an investigation on the choice of heat recovery ventilator for the buildings with little moisture emissions is carried out. The annual composition of energy consumpti... Considering four different climate zones in China, an investigation on the choice of heat recovery ventilator for the buildings with little moisture emissions is carried out. The annual composition of energy consumption of air intake for per unitary air ventilation flow rate is evaluated by employing the testing data of climatic parameters in eight selected cities. The analysis shows that the total heat recovery is suitable in a controlled ventilation system with air humidity controlled during heating period of all the climates. For the building without air humidity controlled in winter, the sensible heat recovery ventilators can be used in severe cold and cold regions, and total heat recovery systems are more suitable for energy saving in hot summer and cold winter and hot summer and warm winter regions. 展开更多
关键词 中国 气候带 热回收通风装置 选择
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Assessment of Patterns of Climate Variables and Malaria Cases in Two Ecological Zones of Ghana
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作者 Nana Ama Browne Klutse Fred Aboagye-Antwi +1 位作者 Kwadwo Owusu Yaa Ntiamoa-Baidu 《Open Journal of Ecology》 2014年第12期764-775,共12页
Climate change is projected to impact human health, particularly incidence of water related and vector borne diseases, such as malaria. A better understanding of the relationship between rainfall patterns and malaria ... Climate change is projected to impact human health, particularly incidence of water related and vector borne diseases, such as malaria. A better understanding of the relationship between rainfall patterns and malaria cases is thus required for effective climate change adaptation strategies involving planning and implementation of appropriate disease control interventions. We analyzed climatic data and reported cases of malaria spanning a period of eight years (2001 to 2008) from two ecological zones in Ghana (Ejura and Winneba in the transition and coastal savannah zones respectively) to determine the association between malaria cases, and temperature and rainfall patterns and the potential effects of climate change on malaria epidemiological trends. Monthly peaks of malaria caseloads lagged behind monthly rainfall peaks. Correlation between malaria caseloads and rainfall intensity, and minimum temperature were generally weak at both sites. Lag correlations of up to four months yielded better agreement between the variables, especially at Ejura where a two-month lag between malaria caseloads and rainfall was significantly high but negatively correlated (r = -0.72;p value < 0.05). Mean monthly maximum temperature and monthly malaria caseloads at Ejura showed a strong negative correlation at zero month lag (r = -0.70, p value < 0.05), with a similar, but weaker relationship at Winneba, (r = -0.51). On the other hand, a positive significant correlation (r = 0.68, p value < 0.05) between malaria caseloads and maximum temperature was observed for Ejura at a four-month lag, while Winneba showed a strong correlation (r = 0.70;p value < 0.05) between the parameters at a two-month lag. The results suggest maximum temperature as a better predictor of malaria trends than minimum temperature or precipitation, particularly in the transition zone. Climate change effects on malaria caseloads seem multi-factorial. For effective malaria control, interventions could be synchronized with the most important climatic predictors of the disease for greater impact. 展开更多
关键词 MALARIA RAINFALL Temperature climate Change ECOLOGICAL zone
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Variability and Variation Characteristics of Climate in Northern Winter Wheat Zone during 1961-2004
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作者 NING Jin-hua1,SHEN Shuang-he2 1.Meteorological Training Center of Hunan Meteorological Bureau,Changsha 410125,China 2.Department of Applied Meteorological Science,Nanjing University of Information Science & Technology,Nanjing 210044,China 《Meteorological and Environmental Research》 CAS 2011年第7期30-34,共5页
[Objective] The research aimed to study the variability and variation characteristics of climate in northern winter wheat zone during 1961-2004.[Method] Based on the meteorological data (temperature,precipitation and ... [Objective] The research aimed to study the variability and variation characteristics of climate in northern winter wheat zone during 1961-2004.[Method] Based on the meteorological data (temperature,precipitation and sunshine) of 55 meteorological stations in northern winter wheat zone during 1961-2004 and the yield data of winter wheat,by using the linear regression,correlated coefficient and climatic tendency rate,the spatial and temporal evolution characteristics of agricultural climatic resources (sunshine hours,temperature and precipitation) in northern winter wheat zone were analyzed.[Result] The annual average temperature,precipitation and sunshine hours in northern winter wheat zone during 1961-2004 all presented certain zonal distribution in the space.The precipitation and temperature gradually decreased from south to north.The sunshine hours gradually increased from south to north.The annual average temperature overall presented rise trend in northern winter wheat zone in 44 years,but the rise rate had difference in the different areas.The rise of annual average temperature in the high-latitude zone was more obvious than that in the low-latitude zone.The annual rainfall overall presented decrease trend,and the tendency rate of annual precipitation had significant difference in the different areas.The decrease rates of rainfalls in the central and western areas were bigger than that in other areas.The annual sunshine hours overall presented decline trend.In most areas,the tendency rate of annual sunshine hours was negative.But there was certain difference in the different areas.The zones where the decrease amplitude was smaller scattered in the west,and included central Shaanxi,south of Shanxi and some areas in southeast of Shandong.The decrease amplitudes were bigger in south of Henan,northwest of Shandong and south of Hebei.[Conclusion] The research provided theoretical basis for understanding the historical evolution of climate in northern winter wheat zone. 展开更多
关键词 climatic variability Variation characteristic Northern winter wheat zone China
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Climate change and China's coastal zones and seas:Impacts,risks,and adaptation
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作者 Rongshuo Cai Kexiu Liu +1 位作者 Hongjian Tan Xiuhua Yan 《Chinese Journal of Population,Resources and Environment》 2021年第4期304-310,共7页
This article provides an assessment of the changes in marine climate drivers(hazards),associated impacts,risks,and adaptation to the coastal China zones and seas since the mid 20th century.The results show that:①Mari... This article provides an assessment of the changes in marine climate drivers(hazards),associated impacts,risks,and adaptation to the coastal China zones and seas since the mid 20th century.The results show that:①Marine climate drivers,such as ocean warming,sea level rise,typhoon,storm surges and marine heat waves(MHWs),have increased significantly in strength,frequency and range over the past decades.②Ocean warming has caused substantial changes in marine phenology,species composition,geographical distribution,and frequent occurrences of ecological disasters such as red tides,green tides,and macro-jellyfish outbreaks,while MHWs have induced degradation in tropical coral reefs and major losses in the marine aquaculture industry in the coastal China seas.③Sea level rise threatens the typical habitats of coastal wetlands such as mangrove and estuaries,and exacerbates coastal erosion,seawater intrusion and the impacts of typhoon,storm surges on the coastal flood disasters.④Human activities,such as large-scale reclamation,pollutant discharge,and overfishing,have increased the exposure and vulnerability of China's marine and coastal ecosystems,leading to the low-aging and miniaturization of fishery types,decline of offshore fishery resources,reduction of coastal wetland areas,and degradation of biodiversity and ecosystem stability.⑤Under different climate scenarios such as low and high greenhouse gases emission scenario(RCP 2.6 and 8.5),as the warming and sea level rise in the coastal China seas continue,extreme sea level(ESL)events will occur more frequently,e.g.,by the end of this century,the current once per century ESL events will become annually or even annually less(RCP 8.5)in many coastal areas,such as at Lvsi and Xiamen tidal gauge stations;and the ESL events could pose serious risks on the coastal areas.Finally,the article further discusses the adaptation measures and related uncertain issues to address climate change in the coastal China zones and seas,and puts forward relevant countermeasures and suggestions in order to reduce its negative impacts on the sustainable development of human community. 展开更多
关键词 climate change OCEAN Coastal zone Disaster risk Adaptation measure
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Assessing the Impacts of Climate Change on Crop Yields in Different Agro-climatic Zones of India
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作者 Naveen P Singh Bhawna Anand +3 位作者 S K Srivastava K V Rao S K Bal M Prabhakar 《Journal of Atmospheric Science Research》 2020年第4期16-27,共12页
The study attempts to estimate and predict climate impact on crop yields using future temperature projections under two climate emissions scenarios of RCP 4.5 and 8.5 for three different time periods(2030s,2050s and 2... The study attempts to estimate and predict climate impact on crop yields using future temperature projections under two climate emissions scenarios of RCP 4.5 and 8.5 for three different time periods(2030s,2050s and 2080s)across Agro-climatic zones(ACZ)of India.During the period 1966-2011,a significant rise was observed in both the annual mean maximum and minimum temperature across ACZs.Rainfall recorded an annual decline in Himalayan Regions and Gangetic Plains and a rise in Coastal Regions,Plateau&Hills and Western Dry Region.Our results showed high heterogeneity in climate impact on kharif and rabi crop yields(with both negative and positive estimates)across ACZs.It was found that rainfall had a positive effect on most of crop yields,but was not sufficient enough to counterbalance the impact of temperature.Changes in crop yield were more pronounced for higher emission scenario of RCP 8.5.Thus,it was evident that the relative impacts of climate change and the associated vulnerability vary by ACZs,hence comprehensive crop and region-specific adaptation measures should be emphasized that helps in enhancing resilience of agricultural system in short to medium term. 展开更多
关键词 Agro-climatic zones climate change Crop yields RCPs
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The Permian-Triassic Transitional Zone: Jordan, Arabian Plate;Linked to Siberian Large Igneous Province and Neo-Tethys Breakup Degassing via Climate Forcing, Atmospheric Hazard and Metal Toxicity
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作者 Werner Schneider Elias Salameh 《Open Journal of Geology》 2022年第6期472-503,共32页
End-Permian Gondwana siliciclastics (50 - 70 m) of the Um Irna F exposed along the NE Dead Sea, exhibit carbonate-free fining upward cycles (FUC) deposited during acid flash flood events under tropical climate. Severa... End-Permian Gondwana siliciclastics (50 - 70 m) of the Um Irna F exposed along the NE Dead Sea, exhibit carbonate-free fining upward cycles (FUC) deposited during acid flash flood events under tropical climate. Several ferruginous paleosol intercalations cover periods of drying upward formation (DUP) under semiarid/arid climates. Thin grey pelite beds interbedded between paleosol and overlying FUC, are interpreted as tephra deposits sourced in Siberian LIP- and Neo-Tethys (NT)-Degassing. The Wadi Bassat en Nimra-section exhibits the P-T transitional zone where flash flood deposits meet supra-/intertidal sediments of the southward-directed transgressive NT. Decreasing flash-flooding continued through the Lower Scythian (Ma’in F.) during transgression, reworking, and resedimentation. Two euryhaline foraminifera-bearing limestone beds are discussed as indicators for the end of mass extinction (recovery phase: ca. 250.8 - 250.4 Ma) possibly correlating with the Maximum Flooding Surface MFS Tr 10 (ca. 250.5 Ma) on the Arabian Shelf (Khuff cycles B;A). Comparable data from the Germanic Basin as FUC/DUP-cycles, tephrasuspicious “Grey Beds” with high concentrations of As, Co, Pb, Zn, and Cu as well as the U-Pb Age data of the Siberian LIP meet the PTB-Zone between the MFSs Intervals P 40 (ca. 254 Ma)/Tr 10 (ca 250.5 Ma) on the Arabian Shelf. MFS (Tr 10, 20, 30) and SBs resp. on the Arabian Plate, as well as Scythian Substage boundaries correlate with &#8706<sup>13</sup> C-excursions recorded at Musandam, UAE. Thereby, the ratio of greenhouse gases (+climate forcing)/aerosols und tephra (-climate forcing) takes a significant influence on the &#8706<sup>13</sup>C-Variation. 展开更多
关键词 P-T Transition zone JORDAN Arabian Plate SILICICLASTICS Flash Flood Deposits Neo-Tethys Transgression Siberian LIP Degassing: Acid Rain Tuffs Metal Toxcicity climate Forcing Milankovitch Croll Cycles Germanic Basin (Correlation) Earth/Moon Interplay Self-Regulation (Autopoiesis)
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Response of Vegetation Cover to Climate Change and Influence of Dusty Weather in the Desertloess Transitional Zone of China
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作者 Yajun WANG 《Agricultural Science & Technology》 CAS 2013年第10期1526-1528,F0003,共4页
[Objective]This study aimed to analyze the relationships of the normalized difference vegetation index(NDVI)(1981-2006)in the desert-loess transitional zone of China with precipitation and temperature.[Method]The aver... [Objective]This study aimed to analyze the relationships of the normalized difference vegetation index(NDVI)(1981-2006)in the desert-loess transitional zone of China with precipitation and temperature.[Method]The average method and the correlation function were applied in this study.[Result]The results indicated that during the growing season NDVI was positively correlated with precipitation in the current month,last month and the month before last,especially the last month.NDVI mostly negatively correlated with temperature,especially the temperature in the last month,which shows that the higher temperature,the more adverse the conditions for vegetation growth.[Conclusion]NDVI from August to October clearly is one of the significant factors influencing dust storm weather in spring of the next year. 展开更多
关键词 过渡带 沙尘天气 气候变化 植被覆盖 沙漠 中国 黄土 温度相关性
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