期刊文献+
共找到47篇文章
< 1 2 3 >
每页显示 20 50 100
种植密度和施氮量对不同株高夏玉米产量和氮素利用的影响 被引量:26
1
作者 任佰朝 范霞 +3 位作者 董树亭 刘鹏 赵斌 张吉旺 《植物营养与肥料学报》 CAS CSCD 北大核心 2017年第2期269-277,共9页
【目的】本研究旨在探讨不同株高夏玉米产量和氮素利用对种植密度和施氮量的响应。【方法】以矮秆玉米品种登海661(DH661)、中秆品种郑单958(ZD958)和高秆品种鲁单981(LD981)为试验材料,在大田条件下设置2个种植密度(67500和82500 plant... 【目的】本研究旨在探讨不同株高夏玉米产量和氮素利用对种植密度和施氮量的响应。【方法】以矮秆玉米品种登海661(DH661)、中秆品种郑单958(ZD958)和高秆品种鲁单981(LD981)为试验材料,在大田条件下设置2个种植密度(67500和82500 plant/hm^2)和3个施氮量(N 0、180和270 kg/hm^2),以不施氮为对照,研究种植密度和施氮量对不同株高夏玉米氮素吸收与利用特性的影响。【结果】在密度为82500 plant/hm^2条件下,品种DH661、ZD958和LD981的籽粒产量分别较67500 plant/hm^2分别提高5.0%、10.2%和12.5%;施氮180和270 kg/hm^2处理DH661、ZD958和LD981的籽粒产量差异不显著。高密度条件下(82500 plant/hm^2),施氮270 kg/hm^2时DH661氮素转运效率和转运氮贡献率较180 kg/hm^2显著降低,ZD958和LD981变化不显著;低密度条件下(67500 plant/hm^2),施氮270 kg/hm^2时DH661和ZD958氮素转运效率和氮素转运贡献率较180 kg/hm^2显著提高,LD981的则显著降低。DH661的氮素利用效率较ZD958和LD981分别提高7.4%和39.1%,LD981的氮素吸收效率较ZD958和DH661品种分别提高18.9%和25.0%。【结论】在低密度67500 plant/hm^2条件下,增施氮肥,矮秆和中秆品种的氮素转运效率和氮素转运贡献率显著降低,而高秆品种的则提高。高密度82500 plant/hm^2条件下,增施氮肥,矮秆品种氮素转运效率和氮素转运贡献率显著降低,中秆和高秆品种的无显著变化。 展开更多
关键词 不同株高夏玉米 种植密度 施氮量 氮素效率
下载PDF
满足用户需要 提高夏秋用种孵化率
2
作者 于祥云 《山东蚕业》 2006年第1期18-19,共2页
关键词 浸酸 冷藏时间 收蚁 高夏 品种性状 蚕种质量 滞育 冷藏能力 蚕种保护 蚕种生产
下载PDF
Climate state of the Three Gorges Region in the Yangtze River basin in 2022–2023
3
作者 Tong Cui Xianyan Chen +3 位作者 Xukai Zou Linhai Sun Qiang Zhang Hongling Zeng 《Atmospheric and Oceanic Science Letters》 CSCD 2024年第5期61-66,共6页
Based on daily observation data of the Three Gorges Region(TGR)of the Yangtze River basin and global reanalysis data,the climate characteristics,climate events,and meteorological disasters of the TGR in 2022 and 2023 ... Based on daily observation data of the Three Gorges Region(TGR)of the Yangtze River basin and global reanalysis data,the climate characteristics,climate events,and meteorological disasters of the TGR in 2022 and 2023 were analyzed.For the TGR,the average annual temperature for 2022 and 2023 was 0.8℃ and 0.4℃ higher than normal,respectively,making them the two warmest years in the past decade.In 2022,the TGR experienced its warmest summer on record.The average air temperature was 2.4℃ higher than the average,and there were 24.8 days of above-average high temperature days during summer.Rainfall in the TGR varied significantly between 2022 and 2023.Annual rainfall was 18.4%below normal and drier than normal in most parts of the region.In contrast,the precipitation in 2023 was considerably higher than the long-term average,and above normal for almost the entire year.The average wind speed exhibited minimal variation between the two years.However,the number of foggy days and relative humidity increased in 2023 compared to 2022.In 2022–2023,the TGR mainly experienced meteorological disasters such as extreme high temperatures,regional heavy rain and flooding,overcast rain,and inverted spring chill.Analysis indicates that the abnormal western Pacific subtropical high and the abnormal persistence of the eastward-shifted South Asian high were the two important drivers of the durative enhancement of record-breaking high temperature in the summer of 2022. 展开更多
关键词 Three Gorges Region Climate state Extreme high temperature Torrential summer rainfall Climate analysis
下载PDF
Effect of N Fertilization on Yield, N Absorption and Utilization of Two Species of Super High-Yielding Summer Maize 被引量:6
4
作者 王宜伦 刘天学 +2 位作者 谭金芳 张许 李潮海 《Agricultural Science & Technology》 CAS 2012年第2期339-342,374,共5页
[Objective] The aim was to study on effects of N fertilizer on yield, N absorption and utilization of different cultivars of super high-yielding summer maize, in order to provide reference for reasonable N fertilizati... [Objective] The aim was to study on effects of N fertilizer on yield, N absorption and utilization of different cultivars of super high-yielding summer maize, in order to provide reference for reasonable N fertilization in accordance with different cultivars. [Method] Field experiment was conducted to study on effects of different N fertilizers on yield, N absorption and use efficiency of Zhengdan 958 and Xundan 20, in order to learn the effect differences at different N fertilizer levels. [Result] After N was applied, yields of the two summer maize increased significantly. Zhengdan 958 achieved the highest in yield and proceeds at 12 051.18 kg/hm2 and 1 722.40 yuan/hm2, respectively in low N level. In contrast, Xundan 20 achieved the highest at 13 166.00 kg/hm2 and 1 343.92 yuan/hm2 in the above two aspects in high N level. Compared with Zhengdan 958, Xundan 20 increased by 9.90%, 5.20% and 12.00% in N levels of 0, 240, and 450 kg/hm2, respectively. When N fertilizers were applied, protein yield of Xundan 20 was significantly higher than that of Zhengdan 958, so that higher N fertilizers contributed higher protein yield for Xundan 20. In high N level, N efficiency, N-fertilizer utilization and partial productivity of Xundan 20 were significantly higher than that of Zhengdan 958. [Conclusion] Lower N-fertilizer was suitable for Zhengdan 958 and Xundan 20 would get a good harvest if more N-fertilizers were applied. The results provided references for reasonable N fertilization. 展开更多
关键词 Super high-yielding Summer maize CULTIVAR N-FERTILIZER YIELD Accumulation of N N efficiency
下载PDF
Effects of Postponing N Application on Metabolism,Absorption and Utilization of Nitrogen of Summer Maize in SuperHigh Yield Region 被引量:3
5
作者 王宜伦 王群 +3 位作者 韩丹 任丽 谭金芳 李潮海 《Agricultural Science & Technology》 CAS 2013年第1期131-134,185,共5页
[Objective] The aim was to explore effects of application postponing of N fertilizer and the mechanism of yield increase in order to provide references for N fertilizer application in a rational way. [Method] In a sup... [Objective] The aim was to explore effects of application postponing of N fertilizer and the mechanism of yield increase in order to provide references for N fertilizer application in a rational way. [Method] In a super-high yielded region of summer maize, field experiment was conducted to research effects of N fertilizer postponing on key enzymes of N metabolism, yield of maize and N fertilizer use. [Result] After application of N fertilizer was postponed, NR, SPS and GS activities of ear-leaf of summer maize increased by 11.99%-34.87%, 8.25%-10.64% and 10.00%- 16.81% on the 28^th d of silking; content of soluble sugar in leaves enhanced signifi- cantly and accumulated nitrogen increased by 5.00%-9.74% in mature stage. The postponing fertilization of "30% of fertilizer in seedling stage+30% of fertilizer in flare- opening stage+40% of fertilizer in silking stage meets N demands of summer maize in late growth period. Compared with conventional fertilization, the maize yield, agro- nomic efficiency and use of N fertilizer all improved by 5.05%, 1.75 kg/kg and 6.87%, respectively, after application postponed. [Conclusion] Application postponing of N fertilizer maintains activity of NR, GS and SPS higher and coordinates metabolism of C and N in late growth period, to further improve yield of maize. 展开更多
关键词 Summer maize Super high yield Application postponing of N fertilizer Nitrogen metabolism Use efficiency of N fertilizer
下载PDF
论临安县夏秋饲养多丝量春用蚕品种的成功实践
6
作者 应坚 胡永福 《蚕学通讯》 1989年第1期40-44,共5页
我们临安县三十年来,以深入探索并充分利用本地气像资源优势为研究方向,以改革夏秋养蚕的节次布局,品种布局和分期饲养量布局为手段,大力推广夏秋饲养多丝量春用蚕品种。已经收到提高夏秋茧产、质量和养蚕经营效益的显著成效。现就其研... 我们临安县三十年来,以深入探索并充分利用本地气像资源优势为研究方向,以改革夏秋养蚕的节次布局,品种布局和分期饲养量布局为手段,大力推广夏秋饲养多丝量春用蚕品种。已经收到提高夏秋茧产、质量和养蚕经营效益的显著成效。现就其研究推广历程、经营效益与技术经验分述如下: 展开更多
关键词 蚕品种 品种布局 秋茧 临安 产茧量 高夏 春期 蚕期 晚秋蚕 秋期
下载PDF
Genetic Parameters Evaluation of Main Reproductive Traits for the New Yorkshire Dam Line with High Prolificacy
7
作者 宋忠旭 孙华 +3 位作者 彭先文 李良华 董斌科 梅书棋 《Agricultural Science & Technology》 CAS 2013年第10期1465-1467,共3页
The genetic parameters of main reproductive traits for the new Yorkshire line with high prolificacy were evaluated by multiple animal model DFREML The re- suits showed that the heritability evaluates of the total numb... The genetic parameters of main reproductive traits for the new Yorkshire line with high prolificacy were evaluated by multiple animal model DFREML The re- suits showed that the heritability evaluates of the total number of born (TNB), alive number of born (ANB), litter weigh at birth (LWB) and litter weight at age of 21 days were 0.10, 0.15, 0.09 and 0.14, respectively. The genetic correlations between these traits, for example, the correlations between TNB/ANB, NB/LWB, TNB/LW21, ANB/LWB, ANB/LW21 and LWB/LW21 were 0.87, 0.74, 0.43, 0.69, 0.59 and 0.51, respectively. 展开更多
关键词 New Yorkshire dam line with high prolificacy DFREML Variance com- ponent Genetic parameter
下载PDF
Effects of Enhanced Ultraviolet Radiation-B on Maize in Arid Regions of Middle-high Elevation 被引量:13
8
作者 张磊 王连喜 +2 位作者 李福生 车晶晶 杜宏娟 《Agricultural Science & Technology》 CAS 2009年第1期11-14,73,共5页
[Objective] The experiment aimed to explore the influence of enhanced ultraviolet radiation-B on maize in arid regions of middle-high elevation for correct assessing the influence of enhanced ultraviolet radiation-B o... [Objective] The experiment aimed to explore the influence of enhanced ultraviolet radiation-B on maize in arid regions of middle-high elevation for correct assessing the influence of enhanced ultraviolet radiation-B on maize and providing scientific reference to make proper countermeasures. [ Method] The location test in field and lift lamp of UV-B were used to observe the changes of maize height, leaf area and number of green leaves under influences of different UV-B radiation. [ Result] In arid regions of middle-high elevation, enhanced ultraviolet radiation-B could dwarf maize plant, decrease leaf area, decline number of green leaves and yield. The reason of decreasing leaf area was that enhanced ultraviolet radiation-B shortened leaf length and leaf width while the reason of declining yield was that yield components were all negatively influ- enced and with the increase of ultraviolet radiation-B, the yield declined dramatically. [ Concluslonl The result of this experiment would be good for maize production in arid regions of middle-high elevation. 展开更多
关键词 UV-B Middle-high elevation Arid area MAIZE
下载PDF
Two Northward Jumps of the Summertime Western Pacific Subtropical High and Their Associations with the Tropical SST Anomalies 被引量:13
9
作者 SU Tong-Hua XUE Feng 《Atmospheric and Oceanic Science Letters》 2011年第2期98-102,共5页
Based on the pentad mean ridgeline index of the western Pacific subtropical high (WPSH), the authors identified the two northward jumps of the WPSH from 1979 to 2008 and revealed their associations with the tropical S... Based on the pentad mean ridgeline index of the western Pacific subtropical high (WPSH), the authors identified the two northward jumps of the WPSH from 1979 to 2008 and revealed their associations with the tropical SST anomalies. The authors show that the northward jumps, especially the second jump, exhibited remarkable interannual variability. In addition, the authors find that the two northward jumps were mutually independent and were influenced by the SST anomalies in the different regions of the tropical Pacific. The first jump was positively correlated with the SST anomalies in the tropical central Pacific from the preceding winter to June. In contrast, the second jump was positively related to ENSO in the preceding winter, but this correlation tended to weaken with the decay of ENSO and disappeared in July. Instead, a positive correlation was found in the Indian Ocean. We therefore suggest that ENSO plays an indirect role in the second jump through the capacitor effect of the Indian Ocean. 展开更多
关键词 western Pacific subtropical high northward iump sea surface temperature anomaly ENSO
下载PDF
An Investigation of the Formation of the Heat Wave in Southern China in Summer 2013 and the Relevant Abnormal Subtropical High Activities 被引量:15
10
作者 PENG Jing-Bei 《Atmospheric and Oceanic Science Letters》 CSCD 2014年第4期286-290,共5页
In the summer of 2013, an unprecedented heat wave was experienced over a vast area of southern China. The great areal extent, duration, and strength of this high temperature are very rare. For the 2013 hot spell, the ... In the summer of 2013, an unprecedented heat wave was experienced over a vast area of southern China. The great areal extent, duration, and strength of this high temperature are very rare. For the 2013 hot spell, the major and direct influence mostly came from the anomaly of the western Pacific subtropical high(WPSH). The abnormally strong and stable WPSH was associated with specific surrounding circulations. The eastward extension of a stronger Qinghai-Xizang high favored the westward extension of the WPSH. The weaker cold air activity from the polar region led to the northward shift of the WPSH and helped it to remain stable. In the tropics, the western segment of the ITCZ was abnormally strong in the period, and supported the maintenance of the WPSH from the south. In addition, the interdecadal variation of the WPSH provided a decadal background for the anomaly variation of the WPSH that summer. 展开更多
关键词 heat wave southern China western Pacific subtropical high
下载PDF
Influence of Different Root Temperature Treatment on Microstructure of Tomato Leaves 被引量:1
11
作者 韩亚平 李亚灵 +2 位作者 雷振宏 赵丹 贾学思 《Agricultural Science & Technology》 CAS 2016年第8期1834-1837,1841,共5页
Following the study on effects of different root temperature treatments on growth and stomata of tomato plants under high temperature in summer, the influence of different root temperature treatments on microstructure... Following the study on effects of different root temperature treatments on growth and stomata of tomato plants under high temperature in summer, the influence of different root temperature treatments on microstructure of tomato leaves was studied in depth in this paper. The tomato plants were cultured with circulating nutrient solutions. Under three different root temperature treatments [(23±1), (28±1), (33±1)℃], the microstructure of tomato leaves were observed and measured with paraffin section method. The results showed that with the increase of root temperature, the thickness, palisade tissue thickness, spongy tissue thickness of tomato leaves all decreased, but the epidermis thickness and palisade tissue thickness to spongy tissue thickness ratio increased. Therefore, increased root temperature led to drought stress to tomato plants, and in order to adapt to the hot and drought environment, tomato plants changed their structural characteristics. 展开更多
关键词 Summer heat Greenhouse tomato Root temperature LEAF MICROSTRUCTURE
下载PDF
Possible Impact of the Summer North Atlantic Oscillation on Extreme Hot Events in China 被引量:10
12
作者 SUN Jian-Qi 《Atmospheric and Oceanic Science Letters》 2012年第3期231-234,共4页
This paper reveals that the summer North Atlantic Oscillation (SNAO) is closely related to the extreme hot event (EHE) variability in China during the period of 1979 2009, with a positive-phase (negative-phase) SNAO c... This paper reveals that the summer North Atlantic Oscillation (SNAO) is closely related to the extreme hot event (EHE) variability in China during the period of 1979 2009, with a positive-phase (negative-phase) SNAO corresponding to less (more) EHEs in northern China. The summer circulation anomalies associated with the SNAO give further confirmation of the above relationship. In a positive-phase (negative-phase) SNAO year, there is an anomalous cyclone (anticyclone) over central East Asia, which can increase (decrease) the total cloud cover over this region. Such changes of the total cloud cover can then decrease (increase) the solar radiation reaching the surface, which is consequently unfavorable (favorable) to the formation of EHEs over northern China. 展开更多
关键词 summer North Atlantic Oscillation extreme hot events total cloud cover solar radiation
下载PDF
Circulation anomalies in the mid–high latitudes responsible for the extremely hot summer of 2018 over northeast Asia 被引量:9
13
作者 XU Ke LU Riyu +1 位作者 MAO Jiangyu CHEN Ruidan 《Atmospheric and Oceanic Science Letters》 CSCD 2019年第4期231-237,共7页
This study investigated the contributions of mid–high-latitude circulation anomalies to the extremely hot summer(July and August;JA)of 2018 over Northeast Asia(NEA).The JA-mean surface air temperature in 2018 was 1.2... This study investigated the contributions of mid–high-latitude circulation anomalies to the extremely hot summer(July and August;JA)of 2018 over Northeast Asia(NEA).The JA-mean surface air temperature in 2018 was 1.2°C higher than that of the 1979–2018 climatology,with the amplitude of such an anomaly almost doubling the interannual standard deviation,making 2018 the hottest year during the analysis period 1979–2018.The abnormal warming over NEA was caused by a local positive geopotential height anomaly reaching strongest intensity in JA 2018.Further investigation suggested that the upper-tropospheric circulation anomalies over northern Europe and the Caspian Sea were crucial to forming this NEA circulation anomaly through initiating downstream wave trains.Particularly,the geopotential heights over these two regions were concurrently at their highest in JA 2018,and therefore jointly contributed to the profound circulation anomaly over NEA and the hottest summer on record.Due to these two teleconnection patterns,the temperature anomalies in NEA are closely related to those in both northern Europe and the Caspian Sea,where the similarly extreme warming also happened in 2018. 展开更多
关键词 Northeast Asia summer temperature mid–high latitudes circulation anomalies
下载PDF
ANALYSIS OF MESOSCALE CONVECTIVE SYSTEMS OVER TIBETAN PLATEAU IN SUMMER 被引量:1
14
作者 GUO Zhong-yang DAI Xiao-yan +1 位作者 WU Jian-ping LIN Hui 《Chinese Geographical Science》 SCIE CSCD 2006年第2期116-121,共6页
In this paper, Geostationary Meteorological Satellite (GMS) infrared black-body temperature (Tbb) data from June to August 1998 are used to automatically track the activity of Mesoscale Convective System (MCS) over th... In this paper, Geostationary Meteorological Satellite (GMS) infrared black-body temperature (Tbb) data from June to August 1998 are used to automatically track the activity of Mesoscale Convective System (MCS) over the Tibetan Plateau in China. Consequently, the features of MCS, such as area, intensity, life cycle, activity region and shape, are obtained. High Resolution Limited Area Analysis and Forecasting System (HLAFS) values provided by China National Meteorological Center are used to study the relationships between the MCS trajectories and their environmental physical field values, based on the distribution and trajectories of MCSs over the Tibetan Plateau. Favorable environmental physical field charts of influencing MCS movement out of the Tibetan Plateau in different UTC (Universal Time Coordinate) are developed by using spatial data mining techniques at levels of 400hPa and 500hPa, respectively. 展开更多
关键词 Tibetan Plateau Mesoscale Convective Systems black-body temperature automatically tracking
下载PDF
Large-scale circulation features associated with the heat wave over Northeast China in summer 2018 被引量:9
15
作者 TAO Panhong ZHANG Yaocun 《Atmospheric and Oceanic Science Letters》 CSCD 2019年第4期254-260,共7页
In late July and early August 2018,Northeast China suffered from extremely high temperatures,with the maxium temperature anomaly exceeding 6°C.In this study,the large-scale circulation features associated with th... In late July and early August 2018,Northeast China suffered from extremely high temperatures,with the maxium temperature anomaly exceeding 6°C.In this study,the large-scale circulation features associated with this heat wave over Northeast China are analyzed using station temperature data and NCEP–NCAR reanalysis data.The results indicate that strong anomalous positive geopotential height centers existed from the lower to upper levels over Northeast China,and the related downward motions were directly responsible for the extreme high-temperature anomalies.The northwestward shift of the western Pacific subtropical high(WPSH)and the northeastward shift of the South Asian high concurrently reinforced the geopotential height anomalies and descending flow over Northeast China.In addition,an anomalous Pacific–Japan pattern in the lower troposphere led to the northwestward shift of the WPSH,jointly favoring the anomalous geopotential height over Northeast China.Two wave trains emanating from the Atlantic region propagated eastwards along high latitudes and midlatitudes,respectively,and converged over Northeast China,leading to the enhancement of the geopotential height anomalies. 展开更多
关键词 Large-scale circulation anomalies heat wave in2018 summer Northeast China wave activity flux
下载PDF
Predicting Western Pacific Subtropical High Using a Combined Tropical Indian Ocean Sea Surface Temperature Forecast 被引量:2
16
作者 WANG Li-Wei ZHENG Fei ZHU Jiang 《Atmospheric and Oceanic Science Letters》 CSCD 2013年第6期405-409,共5页
Weather and climate in East China are closely related to the variability of the western Pacific subtropical high(WPSH), which is an important part of the Asian monsoon system. The WPSH prediction in spring and summer ... Weather and climate in East China are closely related to the variability of the western Pacific subtropical high(WPSH), which is an important part of the Asian monsoon system. The WPSH prediction in spring and summer is a critical component of rainfall forecasting during the summer flood season in China. Although many attempts have been made to predict WPSH variability, its predictability remains limited in practice due to the complexity of the WPSH evolution. Many studies have indicated that the sea surface temperature(SST) over the tropical Indian Ocean has a significant effect on WPSH variability. In this paper, a statistical model is developed to forecast the monthly variation in the WPSH during the spring and summer seasons on the basis of its relationship with SST over the tropical Indian Ocean. The forecasted SST over the tropical Indian Ocean is the predictor in this model, which differs significantly from other WPSH prediction methods. A 26-year independent hindcast experiment from 1983 to 2008 is conducted and validated in which the WPSH prediction driven by the combined forecasted SST is compared with that driven by the persisted SST. Results indicate that the skill score of the WPSH prediction driven by the combined forecasted SST is substantial. 展开更多
关键词 western Pacific subtropical high SST tropical Indian Ocean statistical prediction
下载PDF
Combined impact of in-phase and out-of-phase variation between the northern East Asian low and western North Pacific subtropical high on East Asian summer rainfall 被引量:4
17
作者 DU Meng-Xing LIN Zhong-Da LU Ri-Yu 《Atmospheric and Oceanic Science Letters》 CSCD 2017年第4期284-290,共7页
East Asian summer rainfall is affected by both the continental northern East Asian low (NEAL) and the western North Pacific subtropical high (WNPSH) in the lower troposphere. This study investigates the joint effe... East Asian summer rainfall is affected by both the continental northern East Asian low (NEAL) and the western North Pacific subtropical high (WNPSH) in the lower troposphere. This study investigates the joint effect of the two circulation factors on East Asian summer rainfall. It is found that the rainfall in East Asia behaves differently in the years with in-phase and out-of-phase variation between the NEAL and WNPSH. When the NEAL and WNPSH vary in phase, i.e. when they are both stronger, the rainfall anomaly shows a dipole pattern in East Asia and displays opposite changes between north and south of 30°N. When the two circulation factors vary out of phase, the rainfall anomaly is concentrated in the Yangtze River valley. 展开更多
关键词 Northern East Asian low western North Pacificsubtropical high East Asiansummer rainfall interannualvariation
下载PDF
Seasonal variability of salinity budget and water exchange in the northern Indian Ocean from HYCOM assimilation 被引量:10
18
作者 张玉红 杜岩 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2012年第6期1082-1092,共11页
Based on HYbrid Coordinate Ocean Model (HYCOM) assimilation and observations, we analyzed seasonal variability of the salinity budget in the southeastern Arabian Sea (AS) and the southern part of the Bay of Bengal (BO... Based on HYbrid Coordinate Ocean Model (HYCOM) assimilation and observations, we analyzed seasonal variability of the salinity budget in the southeastern Arabian Sea (AS) and the southern part of the Bay of Bengal (BOB), as well as water exchange between the two basins. Results show that fresh water flux cannot explain salinity changes in salinity budget of both regions. Oceanic advection decreases salinity in the southeastern AS during the winter monsoon season and increases salinity in the southern BOB during the summer monsoon season. In winter, the Northeast Monsoon Current (NMC) carries fresher water from the BOB westward into the southern AS; this westward advection is confined to 4°-6°N and the upper 180 m south of the Indian peninsula. Part of the less saline water then turns northward, decreasing salinity in the southeastern AS. In summer, the Southwest Monsoon Current (SMC) advects high-salinity water from the AS eastward into the BOB, increasing salinity along its path. This eastward advection of high-salinity water south of the India Peninsula extends southward to 2°N, and the layer becomes shallower than in winter. In addition to the monsoon current, the salinity difference between the two basins is important for salinity advection. 展开更多
关键词 seasonal variability salinity budget Arabian Sea Bay of Bengal zonal water exchange HYbridCoordinate Ocean Model (HYCOM) assimilation
下载PDF
Interannual variations of surface winds over China marginal seas 被引量:2
19
作者 孙澈 闫晓梅 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2012年第6期922-932,共11页
In a study of surface monsoon winds over the China marginal seas, Sun et al. (2012) use singular value decomposition method to identify regional dominant modes and analyze their interdecadal variability. This paper ... In a study of surface monsoon winds over the China marginal seas, Sun et al. (2012) use singular value decomposition method to identify regional dominant modes and analyze their interdecadal variability. This paper continues to evaluate the interannual variability of each dominant mode and its relation to various atmospheric, oceanic and land factors. The findings include: 1) The intensity of the winter monsoon over the East China Sea is highly correlated with the Siberian High intensity and anti-correlated with the latitudinal position of the Aleutian Low as well as the rainfall in eastern China, Korean Peninsula and Japan; 2) The western Pacific subtropical high is significantly correlated with the summer monsoon intensity over the East China Sea and anti-correlated with the summer monsoon over the South China Sea; 3) The winter monsoon in a broad zonal belt through the Luzon Strait is dominated by the ENSO signal, strengthening in the La Nifia phase and weakening in the E1 Nifio phase. This inverse relation exhibits interdecadal shift with a period of weak correlation in the 1980s; 4) Analysis of tidal records validates the interdecadal weakening of the East Asian summer monsoon and reveals an atmospheric bridge that conveys the ENSO signal into the South China Sea via the winter monsoon. 展开更多
关键词 MONSOON China marginal seas interannual variability ENSO
下载PDF
Asymmetric association of rainfall and atmospheric circulation over East Asia with anomalous rainfall in the tropical western North Pacific in summer 被引量:3
20
作者 LU Ri-Yu HONG Xiao-Wei LI Xin-Yu 《Atmospheric and Oceanic Science Letters》 CSCD 2016年第3期185-190,共6页
It is well known that precipitation anomalies in the tropical western North Pacific (WNP) significantly affect circulation and rainfall in East Asia during summer. In this study, the authors further investigated thi... It is well known that precipitation anomalies in the tropical western North Pacific (WNP) significantly affect circulation and rainfall in East Asia during summer. In this study, the authors further investigated this relationship, by examining the anomalies associated with positive and negative precipitation anomalies in the tropical WNP. The results suggest these anomalies are asymmetric between the enhanced and suppressed WNP rainfall. Positive precipitation anomalies over the WNP, in comparison with their negative counterparts, are more closely related to the meridional teleconnection pattern and rainfall anomalies along the East Asian rain belt. The implications of the results are discussed. 展开更多
关键词 TELECONNECTION East Asianrain fall western NorthPacific East Asian jet asymmetry
下载PDF
上一页 1 2 3 下一页 到第
使用帮助 返回顶部