期刊文献+
共找到71篇文章
< 1 2 4 >
每页显示 20 50 100
A Quasi-Linear Relationship between Planetary Outgoing Longwave Radiation and Surface Temperature in a Radiative-Convective-Transportive Climate Model of a Gray Atmosphere
1
作者 Jie SUN Michael SECOR +1 位作者 Ming CAI Xiaoming HU 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2024年第1期8-18,共11页
In this study,we put forward a radiative-convective-transportive energy balance model of a gray atmosphere to examine individual roles of the greenhouse effect of water vapor,vertical convection,and atmospheric polewa... In this study,we put forward a radiative-convective-transportive energy balance model of a gray atmosphere to examine individual roles of the greenhouse effect of water vapor,vertical convection,and atmospheric poleward energy transport as well as their combined effects for a quasi-linear relationship between the outgoing longwave radiation(OLR)and surface temperature(T_(S)).The greenhouse effect of water vapor enhances the meridional gradient of surface temperature,thereby directly contributing to a quasi-linear OLR-T_(S) relationship.The atmospheric poleward energy transport decreases the meridional gradient of surface temperature.As a result of the poleward energy transport,tropical(high-latitude)atmosphere-surface columns emit less(more)OLR than the solar energy input at their respective locations,causing a substantial reduction of the meridional gradient of the OLR.The combined effect of reducing the meridional gradients of both OLR and surface temperature by the poleward energy transport also contributes to the quasi-linear OLR-T_(S) relationship.Vertical convective energy transport reduces the meridional gradient of surface temperature without affecting the meridional gradient of OLR,thereby suppressing part of the reduction to the increasing rate of OLR with surface temperature by the greenhouse effect of water vapor and poleward energy transport.Because of the nature of the energy balance in the climate system,such a quasi-linear relationship is also a good approximation for the relationship between the annual-mean net downward solar energy flux at the top of the atmosphere and surface temperature. 展开更多
关键词 outgoing longwave radiation greenhouse effect poleward energy transport
下载PDF
Correlation Analysis of Persistent Heavy Rainfall Events in the Vicinity of the Yangtze River Valley and Global Outgoing Longwave Radiation in the Preceding Month 被引量:6
2
作者 汤燕冰 赵璐 高坤 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2009年第6期1169-1180,共12页
Based on the National Oceanic and Atmospheric Administration (NOAA) daily satellite dataset of global outgoing longwave radiation (OLR) for the period of 1974-2004 and the NCEP-NCAR reanalysis for 1971- 2004, the ... Based on the National Oceanic and Atmospheric Administration (NOAA) daily satellite dataset of global outgoing longwave radiation (OLR) for the period of 1974-2004 and the NCEP-NCAR reanalysis for 1971- 2004, the linkage between persistent heavy rainfall (PHR) events in the vicinity of the Yangtze River valley and global OLR leading up to those events (with 1- to 3O-day lag) was investigated. The results reveal that there is a significant connection between the initiation of PHR events over the study area and anomalous convective activity over the tropical Indian Ocean, maritime continent, and tropical western Pacific Ocean. During the 30-day period prior to the onset of PHR events, the major significantly anomalous convective centers have an apparent dipole structure, always with enhanced convection in the west and suppressed convection in the east. This dipole structure continuously shifts eastward with time during the 30-day lead period. The influence of the anomalous convective activity over the tropical oceans on the initiation of PHR events over the study area is achieved via an interaction between tropical and extratropical latitudes. More specifically, anomalous convective activity weakens the Walker circulation cell over the tropical Indian Ocean first. This is followed by a weakening of the Indian summer monsoon background state and the excitation and dispersion of Rossby wave activity over Eurasia. Finally, a major modulation of the large scale background circulation occurs. As a result, the condition of a phase-lock among major large scale circulation features favoring PHR events is established over the study area. 展开更多
关键词 persistent heavy rainfall events global outgoing longwave radiation the Yangtze River valley
下载PDF
Retrieval of Outgoing Longwave Radiation from COMS Narrowband Infrared Imagery 被引量:1
3
作者 Myung-Sook PARK Chang-Hoi HO +1 位作者 Heeje CHO Yong-Sang CHOI 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2015年第3期375-388,共14页
Hourly outgoing longwave radiation (OLR) from the geostationary satellite Communication Oceanography Meteorological Satellite (COMS) has been retrieved since June 2010.The COMS OLR retrieval algorithms are based o... Hourly outgoing longwave radiation (OLR) from the geostationary satellite Communication Oceanography Meteorological Satellite (COMS) has been retrieved since June 2010.The COMS OLR retrieval algorithms are based on regression analyses of radiative transfer simulations for spectral functions of COMS infrared channels.This study documents the accuracies of OLRs for future climate applications by making an intercomparison of four OLRs from one single-channel algorithm (OLR12.0 using the 12.0 μm channel) and three multiple-channel algorithms (OLR10.8+12.0 using the 10.8 and 12.0 pm channels; OLR6.7+10.8 using the 6.7 and 10.8 μm channels; and OLRAll using the 6.7,10.8,and 12.0 μm channels).The COMS OLRs from these algorithms were validated with direct measurements of OLR from a broadband radiometer of the Clouds and Earth's Radiant Energy System (CERES) over the full COMS field of view [roughly (50°S-50°N,70°-170°E)] during April 2011.Validation results show that the root-mean-square errors of COMS OLRs are 5-7 W m-2,which indicates good agreement with CERES OLR over the vast domain.OLR6.7+10.8 and OLRAll have much smaller errors (~ 6 W m-2) than OLR12.0 and OLR10.8+12.0 (~ 8 W m-2).Moreover,the small errors of OLR6.7+10.8 and OLRAll are systematic and can be readily reduced through additional mean bias correction and/or radiance calibration.These results indicate a noteworthy role of the 6.7 μm water vapor absorption channel in improving the accuracy of the OLRs.The dependence of the accuracy of COMS OLRs on various surface,atmospheric,and observational conditions is also discussed. 展开更多
关键词 outgoing longwave radiation Communication Oceanography and Meteorological Satellite Cloud and Earth's Radiant Energy System
下载PDF
CLIMATIC CHARACTERISTICS OF EARTH-ATMOSPHERE OUTGOING LONGWAVE RADIATION OVER CHINA 被引量:1
4
作者 翁笃鸣 《Acta meteorologica Sinica》 SCIE 1995年第2期228-236,共9页
ERBE and ISCCP data are used to investigate the cloud forcing and latitude and atmospheric temperature effects on outgoing longwave radiation(OLR)in the earth-atmosphere system,and the similarity of OLR field to 500 h... ERBE and ISCCP data are used to investigate the cloud forcing and latitude and atmospheric temperature effects on outgoing longwave radiation(OLR)in the earth-atmosphere system,and the similarity of OLR field to 500 hPa and surface effective radiation fields.Also,discussion is taken up of the OLR distribution on a nationwide basis,indicating that the winter(summer)OLR pattern is roughly a zonal type(asymmetrical saddle)with the annual pattern analogous to the January one.In the end the yearly OLR variation features are addressed on a regional basis. 展开更多
关键词 china outgoing longwave radiation(OLR) climatic characteristics
原文传递
ADVANCES IN APPLIED RESEARCH OF THE OUTGOING LONGWAVE RADIATION IN CHINA 被引量:1
5
作者 蒋尚城 《Acta meteorologica Sinica》 SCIE 1993年第3期367-380,共14页
The outgoing longwave radiation(OLR)observed by NOAA satellite series has widely applied in various research fields since the 1980s in China.In this paper,advances of the applied research of OLR are described in the f... The outgoing longwave radiation(OLR)observed by NOAA satellite series has widely applied in various research fields since the 1980s in China.In this paper,advances of the applied research of OLR are described in the following re- spects: (1)Studies of the global ITCZ; (2)Climatology of the subtropical high over northern Pacific; (3)Studies of the tropical cyclone over West Pacific; (4)Characteristics of the intraseasonal variation(ISV)of tropical convective activities; (5)Divergence wind and large scale circulation over the tropics; (6)Studies of the air-sea interaction; (7)Estimation of precipitation over the Tibetan Plateau and the Yangtze River(Changjiang River)basin during the rainy season; (8)Analyses of regional climates of China; (9)Studies of prediction of the severe and disastrous weather and climate; (10)Atlas of OLR. The distinctive features of these advances are reviewed and the focal points of the OLR applied research in future are also suggested. 展开更多
关键词 outgoing longwave radiation(OLR) intertropical convergence zone(ITCZ) subtropical high PRECIPITATION regional climate
原文传递
INVESTIGATION OF LAGGED CORRELATION BETWEEN THE TEMPERATURE OF CHINA AND THE GLOBAL OUTGOING LONGWAVE RADIATION IN 1974-1985
6
作者 陶祖钰 朱元竞 TomasTing 《Acta meteorologica Sinica》 SCIE 1991年第1期16-27,共12页
1-12 month lagged correlations between winter temperatures at 22 stations in China and the global dis- tribution of the Outgoing Longwave Radiation(OLR)are investigated.The basic results are:(1)The monthly averaged te... 1-12 month lagged correlations between winter temperatures at 22 stations in China and the global dis- tribution of the Outgoing Longwave Radiation(OLR)are investigated.The basic results are:(1)The monthly averaged temperatures of Dec.,Jan.and Feb.of China are correlated to the global distribution of OLR of Oct.,Nov.and Dec.,respectively.It is consistent with the response period(about 50 days)of 500 hPa geopotential height field in extratropical latitudes to the thermal forcing in tropical latitudes,and also consis- tent with the Walker cell of a 40-60 day oscillation.(2)There is a significant positive correlation between the winter temperature of the most part of China and the OLR in the Gulf of Mexico.It shows that when the thermal forcing of the Gulf of Mexico is stronger,the excited barotropic instability of westerlies in northern Atlantic could influence the East Asian circulation and cause the temperature of China to be below normal. (3)The temperature around the Tibetan(Xizang)Plateau is negatively correlated to the OLR in western equa- torial Pacific,showing that when the Walker cell is stronger,the local Hadley cell in Southeast Asia is stronger and it causes the temperature around the Tibetan Plateau to be higher than normal. 展开更多
关键词 outgoing longwave radiation winter temperature TELECONNECTION time lag correlation
原文传递
Generation of global 1-km daily top-of-atmosphere outgoing longwave radiation product from 2000 to 2021 using machine learning 被引量:1
7
作者 Chuan Zhan Shunlin Liang 《International Journal of Digital Earth》 SCIE EI 2023年第1期2002-2012,共11页
Top-of-atmosphere(TOA)outgoing longwave radiation(OLR),a key component of the Earth’s energy budget,serves as a diagnostic of the Earth’s climate system response to incoming solar radiation.However,existing products... Top-of-atmosphere(TOA)outgoing longwave radiation(OLR),a key component of the Earth’s energy budget,serves as a diagnostic of the Earth’s climate system response to incoming solar radiation.However,existing products are typically estimated using broadband sensors with coarse spatial resolutions.This paper presents a machine learning method to estimate TOA OLR by directly linking Moderate Resolution Imaging Spectroradiometer(MODIS)TOA radiances with TOA OLR determined by Clouds and the Earth’s Radiant Energy System(CERES)and other information,such as the viewing geometry,land surface temperature and cloud top temperature determined by Modern-Era Retrospective analysis for Research and Applications,Version 2(MERRA-2).Models are built separately under clear-and cloudy-sky conditions using a gradient boosting regression tree.Independent test results show that the root mean square errors(RMSEs)of the clear-sky and cloudy-sky models for estimating instantaneous values are 4.1 and 7.8 W/m^(2),respectively.Real-time conversion ratios derived from CERES daily and hourly OLR data are used to convert the instantaneous MODIS OLR to daily results.Inter-comparisons of the daily results show that the RMSE of the estimated MODIS OLR is 8.9 W/m^(2) in East Asia.The developed high resolution dataset will be beneficial in analyzing the regional energy budget. 展开更多
关键词 TOA outgoing longwave radiation MODIS CERES machine learning Earth’s energy budget
原文传递
Evaluation of Reprocessed Fengyun-3B Global Outgoing Longwave Radiation Data:Comparison with CERES OLR
8
作者 Wanchun ZHANG Jian LIU +4 位作者 Peng ZHANG Ling SUN Hanlie XU Yanjiao WANG Lin CHEN 《Journal of Meteorological Research》 SCIE CSCD 2022年第3期417-428,共12页
Outgoing longwave radiation(OLR)at the top of the atmosphere(TOA)is a key parameter for understanding and interpreting the relationship between clouds,radiation,and climate interactions.It has been one of the operatio... Outgoing longwave radiation(OLR)at the top of the atmosphere(TOA)is a key parameter for understanding and interpreting the relationship between clouds,radiation,and climate interactions.It has been one of the operational products of the Fengyun(FY)meteorological satellites.OLR accuracy has gradually improved with advancements in satellite payload performance and the OLR retrieval algorithm.Supported by the National Key R&D Program Retrospective Calibration of Historical Chinese Earth Observation Satellite data(Richceos)project,a long-term OLR climate data record(CDR)was reprocessed based on the recalibrated Level 1 data of FY series satellites using the latest OLR retrieval algorithm.In this study,Fengyun-3B(FY-3B)’s reprocessed global OLR data from 2010 to 2018 were evaluated by using the Clouds and the Earth’s Radiant Energy System(CERES)global daily OLR data.The results showed that there was a high consistency between the FY-3B instantaneous OLR and CERES Single Scanner Footprint(SSF)OLR.Globally,between the two CDR datasets,the correlation coefficient reached 0.98,and the rootmean-square error(RMSE)was approximately 8-9 W m^(−2).The bias mainly came from the edge regions of the satellite orbit,which may be related to the satellite zenith angle and cloud cover distribution.It was shown that the longterm FY-3B OLR had temporal stability compared to CERES OLR long-term data.In terms of spatial distribution,the mean deviations showed zonal and seasonal characteristics,although seasonal fluctuations were observed in the differences between the two datasets.Effects of FY-3B OLR application to the South China Sea monsoon region and ENSO were demonstrated and analyzed,and the results showed that the seasonal deviation of FY-3B’s OLR comes mainly from the retrieval algorithm.However,it has little effect on the analysis of climate events. 展开更多
关键词 Fengyun-3B(FY-3B) Clouds and the Earth’s Radiant Energy System(CERES) outgoing longwave radiation(OLR) South china Sea monsoon El Niño-Southern Oscillation(ENSO)
原文传递
CLIMATIC CHARACTERISTICS OF NET RADIATION IN THE EARTH-ATMOSPHERE SYSTEM OVER CHINA
9
作者 翁笃鸣 李炬 《Acta meteorologica Sinica》 SCIE 1996年第2期247-256,共10页
Investigated are effects of the total cloudiness and other factors on earth-atmosphere net radia- tion(EANR)and analyzed is its relation to other components and ground surface net radiation in the context of ERBE and ... Investigated are effects of the total cloudiness and other factors on earth-atmosphere net radia- tion(EANR)and analyzed is its relation to other components and ground surface net radiation in the context of ERBE and ISCCP.Evidence suggests that planetary scale albedo and earth-atmo- sphere short wave absorption radiation have maximum effect on the net radiation under study,with the influence of cloud and latitude displayed predominantly through the two factors;OLR has rela- tively weak effect;the earth-atmosphere net radiation is well correlated with surface net radiation. Analysis is also performed of the geographic distribution of the earth-atmosphere net radiation throughout China,and the annual curve of the net radiation on a local basis is marked by high (low)value in summer(winter)with the impact of factors.including total cloudiness responsible largely for the shift of the months with maximum. 展开更多
关键词 net radiation earth-atmosphere system short wave absorption radiation outgoing longwave radiation(OLR) climatic characteristics
原文传递
2023年积石山6.2级地震热红外异常研究
10
作者 钟美娇 张元生 +1 位作者 廖洪月 郭晓 《地震工程学报》 CSCD 北大核心 2024年第4期880-887,共8页
应用卫星遥感数据,采用相对功率谱法和均线差值振幅增强比法,提取甘肃积石山6.2级地震前的热红外信息。结果表明,震前存在显著的热红外异常现象。相对功率谱法提取到的热红外异常现象分为两个阶段:(1)在2023年10月以托莱山断裂和冷龙岭... 应用卫星遥感数据,采用相对功率谱法和均线差值振幅增强比法,提取甘肃积石山6.2级地震前的热红外信息。结果表明,震前存在显著的热红外异常现象。相对功率谱法提取到的热红外异常现象分为两个阶段:(1)在2023年10月以托莱山断裂和冷龙岭断裂交汇处为核心区,出现了沿北东向展布的热红外异常(功率谱最高值超过8);(2)在2023年11月,冷龙岭断裂和金强河断裂交汇处至日月山断裂和拉脊山断裂交汇处出现了较弱的热红外异常(功率谱最高值不到7),异常的空间演化逐步向震中靠近。均线差值振幅增强比法的计算结果显示出背景性异常的特征,9月在祁连山中东至甘东南段出现了显著的长波辐射异常,两种热红外异常提取方法的结果起到了互相佐证的作用。 展开更多
关键词 热红外遥感 亮度温度 长波辐射 地震
下载PDF
2003年云南夏季罕见高温干旱的诊断研究 被引量:36
11
作者 解明恩 程建刚 +1 位作者 范菠 高锡帅 《气象》 CSCD 北大核心 2005年第7期32-37,共6页
2003年夏季云南出现了历史上罕见的大范围异常高温干旱天气,是自1961年以来云南最严重的夏季高温干旱天气之一,影响范围、持续时间及危害程度仅次于1983年。是20世纪80年代中期云南进入气温偏暖期后的一次夏季极端气候事件,打破多项历... 2003年夏季云南出现了历史上罕见的大范围异常高温干旱天气,是自1961年以来云南最严重的夏季高温干旱天气之一,影响范围、持续时间及危害程度仅次于1983年。是20世纪80年代中期云南进入气温偏暖期后的一次夏季极端气候事件,打破多项历史纪录。利用高度、OLR、TBB等资料对此次气候灾害过程进行了诊断分析。发现西太平洋副热带高压持续稳定且偏强偏西,季风低压偏弱偏西,云南TBB值偏高,降水云系较少,OLR值偏高,对流活动抑制,云南正好处于东、西两个垂直环流圈的下沉气流控制区是形成高温干旱的主要原因。 展开更多
关键词 高温干旱 云南 诊断研究 西太平洋副热带高压 20世纪80年代 2003年夏季 极端气候事件 干旱天气 异常高温 夏季高温 影响范围 危害程度 持续时间 历史纪录 诊断分析 灾害过程 降水云系 对流活动 下沉气流 垂直环流 大范围
下载PDF
奇异谱迭代插补的改进算法及其在缺损数据恢复中的应用 被引量:16
12
作者 王辉赞 张韧 +2 位作者 刘巍 王桂华 金宝刚 《应用数学和力学》 CSCD 北大核心 2008年第10期1227-1236,共10页
基于奇异谱分析(SSA)迭代插补的基本思想,针对该方法在参数确定(主成分个数K和嵌入维数M)上存在较大随意性和计算效率低等缺陷,提出了一种参数优化的新算法——区间四分法,该方法在误差曲线存在局部波动情况下仍能有效搜索到全局最优参... 基于奇异谱分析(SSA)迭代插补的基本思想,针对该方法在参数确定(主成分个数K和嵌入维数M)上存在较大随意性和计算效率低等缺陷,提出了一种参数优化的新算法——区间四分法,该方法在误差曲线存在局部波动情况下仍能有效搜索到全局最优参数解,且迭代插补精度和计算效率可得到显著提高.采用外逸长波辐射(OLR)逐日资料进行的插补试验对比分析表明,基于区间四分法改进的SSA迭代插补方案的缺损数据恢复的效率和精度良好. 展开更多
关键词 奇异谱分析 外逸长波辐射 缺损数据插补 区间四分法
下载PDF
云南及其邻近地区OLR场的气候特征 被引量:15
13
作者 解明恩 鲁亚斌 普贵明 《高原气象》 CSCD 北大核心 1999年第2期185-191,共7页
利用美国NOAA卫星观测的15年2.5°×2.5°经纬度网格月平均射出长波辐射(OLR)资料对云南及其邻近地区的辐射气候特征进行了分析,发现OLR分布基本呈纬向型,冬季风期间呈北低南高,夏季风期间则相反。... 利用美国NOAA卫星观测的15年2.5°×2.5°经纬度网格月平均射出长波辐射(OLR)资料对云南及其邻近地区的辐射气候特征进行了分析,发现OLR分布基本呈纬向型,冬季风期间呈北低南高,夏季风期间则相反。云南OLR值大于青藏高原小于热带地区。云南OLR变化与青藏高原反相,而与印度、孟加拉湾、中南半岛、南海地区同位相,但年较差最小。云南OLR分布与降水有较好的对应关系。年均相关系数为-0.59。 展开更多
关键词 云南 射出长波辐射 气候特征 OLR场 邻近地区
下载PDF
中强地震前的长波辐射异常震例研究 被引量:20
14
作者 荆凤 申旭辉 +2 位作者 康春丽 孟庆岩 熊攀 《地震》 CSCD 北大核心 2009年第4期117-122,共6页
文章利用NOAA提供的1°×1°长波辐射产品对2008年发生在我国的三次地震(2008年8月25日仲巴6.8级地震、5月12日汶川8.0级地震和3月21日于田7.3级地震)进行了研究。通过滑动平均,标准方差阈值等方法分析了各地震震前2个月和... 文章利用NOAA提供的1°×1°长波辐射产品对2008年发生在我国的三次地震(2008年8月25日仲巴6.8级地震、5月12日汶川8.0级地震和3月21日于田7.3级地震)进行了研究。通过滑动平均,标准方差阈值等方法分析了各地震震前2个月和震后2个月的长波辐射日数据的时间序列,分析结果表明在震前40余天到震前几天均出现不同程度的长波辐射异常,这些异常可能与地震相关,并且异常的幅度和震级不是简单的线性关系。 展开更多
关键词 长波辐射 6.5级以上地震 热异常 汶川地震
下载PDF
地球长波辐射 (OLR)遥感与重大自然灾害预测 被引量:53
15
作者 刘德富 康春丽 《地学前缘》 EI CAS CSCD 2003年第2期427-435,共9页
针对目前重大自然灾害 (如地震、洪水泛滥、火山喷发等 )还难能作出短期预测预警的现实状况 ,文中提出利用极轨卫星遥感所监测的“地气”系统射出长波辐射 (即OLR)信息 ,是可能攻克这一难关的突破口。文中不仅详细介绍了有关OLR数据的... 针对目前重大自然灾害 (如地震、洪水泛滥、火山喷发等 )还难能作出短期预测预警的现实状况 ,文中提出利用极轨卫星遥感所监测的“地气”系统射出长波辐射 (即OLR)信息 ,是可能攻克这一难关的突破口。文中不仅详细介绍了有关OLR数据的产出原理及其载荷卫星 (NOAA)运行的主要参数 ,而且还结合近年来发生的重大自然灾害实例 ,利用笔者研究的应用OLR提取灾前预测信息的3种方法 ,客观地给出了OLR时空变化图像。结果显示 ,在重大自然灾害事件发生前 ,在未来可能发生重灾的区域及其附近 ,OLR呈现出比周围区域更显著的辐射增强变化特征。这一特征的揭示 ,为利用卫星遥感技术预测未来可能发灾区域及时作出短期预测预警提供了一种新的途径。文末对目前有关强震前热红外异常成因的两种看法做了综合介绍和简要评述。 展开更多
关键词 地球长波辐射遥感 自然灾害 地震 火山喷发 洪灾 灾前预测 OLR
下载PDF
地震红外长波辐射的短期预测指标研究 被引量:13
16
作者 康春丽 李志雄 +6 位作者 孟庆岩 荆凤 李美 闫伟 申旭辉 刘德富 李安 《地震》 CSCD 北大核心 2009年第B10期83-89,共7页
卫星红外遥感技术在地震预测研究中的应用已受到人们的广泛关注。然而,如何能够在震前及时准确地识别出红外异常,从而对可能的地震活动做出有效的短期或短临预测,是目前迫切需要解决的关键技术难题。据此提出了开展区域性短期预测指... 卫星红外遥感技术在地震预测研究中的应用已受到人们的广泛关注。然而,如何能够在震前及时准确地识别出红外异常,从而对可能的地震活动做出有效的短期或短临预测,是目前迫切需要解决的关键技术难题。据此提出了开展区域性短期预测指标研究的思路,即对某一确定地区,结合地震活动开展红外信息的短期及短临预测指标研究。本文以川滇地区为例,通过大量的震例分析和总结,提出了与区域地震活动密切相关的红外短期异常判识指标,这一成果的获取对于有效开展地震的短期预测、实现防震减灾实效具有重要的现实意义和应用前景。 展开更多
关键词 长波辐射 地震红外异常 短期预测 川滇地区
下载PDF
长波辐射(OLR)信息预测华北地震的方法研究 被引量:9
17
作者 康春丽 刘德富 +1 位作者 陈艳 周晓成 《西北地震学报》 CSCD 北大核心 2006年第1期59-63,共5页
利用卫星对地遥测长波辐射(OLR)信息,分析了华北地块OLR信息场的空间分布及其变化特征,结合地震活动分布特点进行了短期预测中强地震判定指标的方法研究。结果表明该方法可对华北地区短期内有无可能发生M5以上的显著地震做出较为明确的... 利用卫星对地遥测长波辐射(OLR)信息,分析了华北地块OLR信息场的空间分布及其变化特征,结合地震活动分布特点进行了短期预测中强地震判定指标的方法研究。结果表明该方法可对华北地区短期内有无可能发生M5以上的显著地震做出较为明确的诊断。经近一年的实际检验效果良好,对华北地区震情监测预报有实用价值。 展开更多
关键词 长波辐射(OLR)信息 华北 地震预测方法
下载PDF
青藏高原OLR的气候特征及其对北半球大气环流的影响 被引量:14
18
作者 李栋梁 章基嘉 吴洪宝 《高原气象》 CSCD 北大核心 1996年第3期259-268,共10页
利用1974—1990年青藏高原地区地-气系统月平均射出长波辐射(OLR)资料,采用EOF方法分析了前3个特征向量场,得到了青藏高原地区地-气系统射出长波辐射的几种异常形式,阐述了它们的天气气候特征,并对不同气候区的... 利用1974—1990年青藏高原地区地-气系统月平均射出长波辐射(OLR)资料,采用EOF方法分析了前3个特征向量场,得到了青藏高原地区地-气系统射出长波辐射的几种异常形式,阐述了它们的天气气候特征,并对不同气候区的持续性及其与北半球大气环流的关系作了研究。结果表明:青藏高原OLR的异常分布可导致北半球500hPa月平均环流的异常,同期表现为沿大圆路径传播的Rossby准定常波波列;冬季高原OLR还具有较好的持续性,可引起滞后1—2个月的环流异常。 展开更多
关键词 青藏高原 大气环流 气候特征 北半球
下载PDF
青藏高原出射长波辐射特征分析 被引量:7
19
作者 苏文颖 毛节泰 纪飞 《大气科学》 CSCD 北大核心 2000年第3期313-323,共11页
对青藏高原地区 1月、4月、7月和 1 0月高时空分辨率的出射长波辐射 (OLR)时间序列进行了谱分析。将各点的功率谱分为三类 :第一类代表日变化 (周期≤ 1d) ,另外两类分别为天气过程 ( 2d≤周期≤ 1 0d)和低频 (周期 >1 0d)变化 ;将... 对青藏高原地区 1月、4月、7月和 1 0月高时空分辨率的出射长波辐射 (OLR)时间序列进行了谱分析。将各点的功率谱分为三类 :第一类代表日变化 (周期≤ 1d) ,另外两类分别为天气过程 ( 2d≤周期≤ 1 0d)和低频 (周期 >1 0d)变化 ;将高原分为 6个区域 ,对区域平均的各季节OLR时间序列进行功率谱分析和显著性检验 ,结果表明 :1、4、1 0月份高原上以日变化为主 ;而 7月份日变化、天气尺度变化和低频变化的贡献相当。显著性分析表明高原上最为显著的周期为 1d周期 ,2~4d的天气尺度振荡也较明显。 6~ 8d和 1 0~ 1 3d处虽有明显的谱峰 ,但只有少数地区和个别季节其谱值能超过 95%的信度检验。 展开更多
关键词 出射长波辐射 谱分析 青藏高原 显著性检验
下载PDF
文安地震前华北区域长波辐射场的异常特征分析 被引量:13
20
作者 康春丽 王亚丽 刘德富 《地震》 CSCD 北大核心 2007年第3期83-88,共6页
利用NOAA/IR极轨卫星所获取并发布的热红外长波辐射(OLR)月平均网格数据信息(空间分辨率为2.5°×2.5°),采用涡度处理方法,在对华北地区OLR多年背景场分布特征分析的基础上,详细研究了2006年7月4日河北文安5.1级地震前华... 利用NOAA/IR极轨卫星所获取并发布的热红外长波辐射(OLR)月平均网格数据信息(空间分辨率为2.5°×2.5°),采用涡度处理方法,在对华北地区OLR多年背景场分布特征分析的基础上,详细研究了2006年7月4日河北文安5.1级地震前华北地区OLR的短期异常演化特征。结果显示,华北地区OLR正常背景场变化较为平稳,但在文安地震之前这种平稳均一的分布格局发生了变化,主要表现为在地震发生之前2个月,在震中附近出现了OLR的显著增强异常现象。结合以往开展的大量的震例分析结果,显示出这种震前的异常演化特征具有广泛的普适性。这一认识的取得对于开展华北地区地震短临预报应用研究具有一定的现实意义。 展开更多
关键词 长波辐射 异常信息 前兆特征 文安5.1级地震
下载PDF
上一页 1 2 4 下一页 到第
使用帮助 返回顶部