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OLR

OLR的相关文献在1990年到2022年内共计107篇,主要集中在大气科学(气象学)、地球物理学、海洋学 等领域,其中期刊论文100篇、会议论文5篇、专利文献2篇;相关期刊44种,包括应用气象学报、高原山地气象研究、干旱气象等; 相关会议4种,包括第四届全国优秀青年气象科技工作者学术研讨会、第四届全国优秀青年气象科技工作者学术研讨会、中国气象学会2004年年会等;OLR的相关文献由223位作者贡献,包括蒋尚城、吴晓、李栋梁等。

OLR—发文量

期刊论文>

论文:100 占比:93.46%

会议论文>

论文:5 占比:4.67%

专利文献>

论文:2 占比:1.87%

总计:107篇

OLR—发文趋势图

OLR

-研究学者

  • 蒋尚城
  • 吴晓
  • 李栋梁
  • 梅宁光
  • 黄莉
  • 张苏平
  • 郭昆兴
  • 陈少勇
  • 丁声
  • 乔木
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 张婉春; 吴晓; 白文广; 曹广真; 孙凌; 张鹏
    • 摘要: 射出长波辐射(OLR)是大气科学研究领域的关键参量,并在辐射相互作用、气候变化和灾害监测等方面发挥重要作用.2018年6月5日静止气象卫星FY2H成功发射,OLR产品是FY2H的业务产品之一.在原有FY2系列OLR反演算法基础上,参考国际上NOAA/HIRS OLR反演算法,结合FY2H/VISSR 3个红外通道设置,建立适合FY2H的OLR反演算法.利用该算法处理FY2H/VISSR的L1级观测数据,生成实时及日、旬、月平均的OLR产品.FY2H的OLR产品与CERES均匀性下垫面的瞬时视场OLR产品对比,RMSE=3.38 W/m2,R=0.99,Bias=0.77 W/m2;与CDR日平均OLR产品对比,RMSE为5~7 W/m2,R为0.97~ 0.98,Bias为-2.2~ 1.9 W/m2;与CDR旬平均OLR产品对比,RMSE为3~5 W/m2,R=0.99,Bias为-1.1~0.4 W/m2;与CDR月平均OLR产品对比,RMSE为2~4 W/m2,R=0.99,Bias为-1.1~0.4 W/m2.这表明FY2H OLR改进算法达到了较高的精度,可满足卫星设计和应用研究精度需求.
    • 林岭; 孔祥增; 李南; 江晓英
    • 摘要: 研究表明大地震之前由于地表温度的变化会引起长波辐射OLR(Outgoing Longwave Radiation)数据异常,但目前缺乏有效的技术来提取异常。我们提出了一种基于随机传感器和鞅理论的异常数据挖掘算法ADRM (Abnormality Detection based on Randomized Transducer and Power Martingales),经过实验对比能有效挖掘异常。本数据集记录了尼泊尔地区2009-2018年10年间的NOAA卫星的OLR数据和经过异常数据挖掘后的相应数据序列。数据集在地域上,以尼泊尔地震震中为中心的周边地域划分为同样经纬度2.5°×2.5°为单位的25个网格;时间上,定义每个年度是从上一年的9月28日到下一年的9月28日,共计366天,2009-2018年10年的数据。数据集存储为1个.xls文件,数据量为3.92 MB。基于该数据集的研究成果分别发表在《地球信息科学学报》(2018年20卷8期)和《IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing》(2018年11卷8期)。
    • 罗布; 智海; 索朗塔杰; 胡壮
    • 摘要: 利用西藏高原地区1987-2016年的逐月夏季降水资料和印度洋偶极子指数资料分析了两者的关系,结果表明:高原地区盛夏降水与表征西印度洋异常海温的西极子指数表现出良好的相关关系,在西极子指数正异常年时高原降水偏多10%〜30%,其中高原中部偏多最为显著,而在负异常年时与之相反。分析其机理研究发现,在正西极子异常年,南海和西太暖池区域的深对流加强、西太副高偏西偏南和印度热低压的减弱使得来自热带的水汽更容易深入高原腹地,其次,南亚高压东体异常增强,配合低空异常辐合,都使得高原降水偏多。同时,高原上空局地纬圈环流在高原中部(90°E附近)上空(400 hPa以上)有异常辐合上升区,使得高原中部更容易发展暖湿切变线、高原低涡等中尺度涡旋低值系统,造成更多的降水。本研究从高原气候变化响应海洋年际变化的角度分析了区域降水的季节差异,可以为高原气候预测提供新的思路。
    • 元震; 肖天贵
    • 摘要: 为进一步探讨高原低涡与高原大气的基本状况及其联系,通过对1981-2015年低涡频次及OLR、500 hPa经纬向风场的统计,分析其气候变化及低频振荡特征,并初步探讨了低涡频次与其他三者低频信号之间的联系.结果表明:4-8月是低涡的频发时段;低涡频次呈逐年增加的趋势,存在显著的2 a、4 a变化周期和55 d、30 d低频振荡周期;在低涡频发期内,OLR平均值为212.2 W·m-2,存在显著的10 ~ 12 a变化周期和45 d、20 d低频振荡,滤波中心存在东进和西退的移动特征,在纬向上表现为向南移动,500hPa纬向风均值为3.56 m·s-1,其逐年及逐日变化均呈下降趋势,存在4 a、10a的变化周期和75 d、45 d的低频振荡周期,30~60 d滤波信号中心以西退和北进为主要移动特征,60 ~90 d滤波信号中心向南移动特征明显,500hPa经向风以北风分量为主,其逐年及逐日变化均为减小趋势,存在4 a变化周期和10-20 d低频振荡;低涡频次与500 hPa纬向风区域平均值在1996年发生突变;低涡频次与大气低频振荡存在密切联系,其与500hPa经向风呈负相关性,7-8月尤为显著,与OLR和500 hPa纬向风在4月至7月中旬呈显著正相关,7月中旬至8月转为负相关,其中与OLR 30-60 d滤波信号呈高度负相关性;500 hPa纬向风滤波信号中心的移动能较好的对应低涡频次空间分布的变化.
    • 元震; 肖天贵
    • 摘要: 为进一步探讨高原低涡与高原大气的基本状况及其联系,通过对1981-2015年低涡频次及OLR、500hPa经纬向风场的统计,分析其气候变化及低频振荡特征,并初步探讨了低涡频次与其他三者低频信号之间的联系。结果表明:4-8月是低涡的频发时段;低涡频次呈逐年增加的趋势,存在显著的2a.4a变化周期和55d、30d低频振荡周期;在低涡频发期内,OLR平均值为212.2W·m^-2,存在显著的10~12a变化周期和145d、20d低频振荡,滤波中心存在东进和西退的移动特征,在纬向上表现为向南移动,500hPa纬向风均值为3.56m·s^-1,其逐年及逐日变化均呈下降趋势,存在4a、10a的变化周期和75d、45d的低频振荡周期,30-60d滤波信号中心以西退和北进为主要移动特征,60-90d滤波信号中心向南移动特征明显,500hPa经向风以北风分量为主,其逐年及逐日变化均为减小趋势,存在4a变化周期和10-20d低频振荡;低涡频次与500hPa纬向风区域平均值在1996年发生突变;低涡频次与大气低频振荡存在密切联系,其与500hPa经向风呈负相关性,7-8月尤为显著,与OLR和500hPa纬向风在4月至7月中旬呈显著正相关,7月中旬至8月转为负相关,其中与OLR30-60d滤波信号呈高度负相关性;500hPa纬向风滤波信号中心的移动能较好的对应低涡频次空间分布的变化。
    • 魏志恒; 康春丽; 马未宇
    • 摘要: The tidal change before and after the Ms6.6(N34.5,E104.2)earthquake occurred on July 22,2013,in Minxian Gansu Province was analyzed.The tidal force was at the lowest phase point when the earthquake occurred,which indicated that the induced earthquake of the tidal force influenced by the thrust fault.According to the data of tidal cycle,the ground long-wave radiation variable condition before and after the earthquake at the epicenter and nearby area(30°~ 40°N,90°~ 110°E)was calculated based on the NOAA satellite data.The result showed that only the OLR of the epicenter and associated fractures appeared significant and continuous abnormal changing.In temporal,the change of the OLR:Initial warming→ strength→ peak→ attenuation→earthquake→return to the normal;in spatial,the abnormal region was consistent with the north area of the North-South Seismic Belt where it was affected by the positive strain accumulation of the Wenchuan earthquake area.In the morphological evolution,the OLR changing process:scattered→conversion→scattered along the fractures,which was fully consistent with the fracturing process of the rock stress loading:initial micro-cracking→expansion rupturing →stress lockout→earthquake →normal.The active faults in the critical state maybe induced by the tidal force in this earthquake,what's more,the stress-strain process of earthquake could be characterized by the OLR anamoly.%分析甘肃岷县Ms6.6地震前后潮汐变化发现,发震时刻引潮力处于最低相位点,显示引潮力的诱震属于典型逆冲断层作用类型.以潮汐周期为时间指示,利用NOAA卫星地面长波辐射(OLR)数据,分析震中及其邻近区域(30°~ 40°N,90°~110°E)地震前后(7月17~ 25日)地面长波辐射值的连续变化状况,结果显示,震前仅震中及其相关联断裂附近OLR发生了显著且连续的异常变化,在时间上经历了起始增温一异常加强一峰值一衰减一发震一平静的演化过程;在空间上异常区域覆盖震中,与汶川地震引发的应变积累正影响区之南北地震带北段基本吻合;在形态演化上,表现出沿断裂带分散一汇聚一分散的破裂过程,并与岩石应力加载破裂的初始微动破裂一扩张破裂一应力闭锁一地震爆发一恢复平静阶段的力学过程完全吻合.这可能预示该地震发震前后天体引潮力对处于临界状态的活动断层具有诱发作用以及长波辐射异常在一定程度上对地震构造应力应变过程辐射进行表征.
    • 吴晓; 白文广
    • 摘要: FY-3系列卫星星载IRAS仪器设有26个通道,其中20个通道用于探测地球大气在红外波段的热辐射,通道辐射率代表了地球大气系统在大气顶的向外辐射光谱信息,与总波段的射出长波辐射(OLR)通量相关性高.该文基于逐线辐射传输模式计算软件LBLRTM对全球2521条大气廓线的大气顶射出辐射率模拟数据,计算了每条廓线的OLR和FY-3B/IRAS,FY-3C/IRAS通道辐射率,用统计回归方法建立了利用IRAS的多通道辐射率计算OLR的非线性理论回归模式;应用模式和FY-3B/IRAS,FY-3C/IRAS的L1级数据,处理得到2016年4月1-30日的全球日平均、月平均OLR格点产品.与Aqua/CERES,Terra/CERES仪器宽波段观测OLR产品对比表明:对于水平分辨率为1°×1°的全球月平均OLR格点产品,均方根误差为2.22 W·m-2,相关系数为0.9982 W· m-2,平均偏差为-0.2W·m-2,表明FY-3/IRAS仪器定标及反演模式均达到较高水平.文中还回顾了历史上不同气象卫星的多种OLR反演算法模式,并对不同模式精度进行了比较.%OLR(outgoing longwave radiation) is the radiative energy flux the Earth and atmosphere emit out into the outspace,which is one of three components of the Earth and atmosphere radiative budget system,refleeting the climate and weather characteristics.Since the invention of meteorological satellites,OLR products have been processed for more than 40 years.Numerous methods have been developed to estimate OLR from satellite observations,including the relationship between the window channel brightness temperature of AVHRR and the flux equivalent brightness temperature proposed by Arnald Gruber in 1977 and George Ohring in 1984,regression models relating OLR with narrow band fluxes of window channel and water vapour channel of geostationary meteorological satellites developed by Liu in 1988,the linear and none-linear models relating OLR with satellite multi-channel radiances developed by Enllingson in 1994 and Lee in 2010.At the same time,broadband instruments such as ERBE and CERES on board of NOAA,Nimbus,Terra,Aqua are designed to directly observe OLR from outspace.Due to the high quality,CERES OLR products become the best available data to validate other retrieved OLR products.The IRAS(infrared atmospheric sounder) on board of FY-3 polar meteorological satellites carry 26 channels,among which 20 channels are used to observe radiances at the top of the Earth atmosphere at the wavenumber between 669 cm-1 and 2666 cm-1.These narrow band radiances have high relations with the full wavenumber radiative flux (OLR) the Earth and atmosphere emit.Therefore,a formula is derived for calculating OLR with multi-channel radiances of IRAS through infrared radiative transfer simulation.Based on radiances at top of atmosphere simulated with LBLRTM (line by line radiative transfer model) software for 2521 atmospheric profiles and statistical regression,a nonlinear model which relates OLR with multi-channel radiances of FY-3/IRAS are developed.By applying the model into FY-3/IRAS L1 data,the global daily mean OLR and monthly mean OLR data in April 2016 are produced.Comparing the IRAS OLR data with the Aqua/CERES and Terra/CERES OLR products,the root mean square error is 7.5 W · m 2,the correlation coefficient is 0.98,the mean bias is-0.2 W · m-2 when comparing the IRAS daily mean OLR with that of CERES.The root mean square error is 2.22 W · m-2,the correlation coefficient is 0.9982,and the mean bias is-0.2 W · m-2 when comparing the IRAS monthly mean OLR with that of CERES.The accuracy indicates that both the calibration quality of FY-3/IRAS instruments and the OLR retrieval model all achieve at a high level.In addition,OLR retrieval models used by various satellites since 1970 are also reviewed in brief.
    • 胡顺起; 曹张驰; 陈滔
    • 摘要: 为了更全面地认识鲁南地区历史极端暴雪发生发展的机制,利用常规探空和地面观测资料、FY-2E长波辐射资料(Outgoing Long-w ave Radiation,OLR)和NCEP/NCAR 1°×1°再分析资料,采用天气动力学分析方法,对2015年11月23-24日出现在山东省南部极端特大暴雪过程的成因和动力结构演变特征进行分析。结果表明:(1)此次降雪发生在回流形势下,对流层中层强西南低空急流、切变线及低层强东北风共同作用,造成异常强暴雪天气。(2)低层西南急流把水汽输送到鲁南地区,并在暴雪区上方产生强的水汽辐合中心,为本次特大暴雪提供了有利的水汽条件。(3)高低空急流耦合,高空槽前正涡度平流使得低层减压,产生上升运动,有利于暴雪发生发展。(4)西南低空急流与偏北风在鲁南上空辐合,是强降雪主要集中在该地区的重要原因。(5)强冷空气降温使得雨快速转雪,降雪持续时间长,导致强降雪发生。(6)OLR特征分析表明,OLR 3 h平均低值中心与3 h最大降雪中心存在明显的负相关关系。研究鲁南地区极端暴雪特征有助于提高该地区灾害性天气的预报能力,对防灾减灾有着重要意义。
    • 李晓霞; 樊晓春; 李奇三; 李常德; 吴芳蓉
    • 摘要: 利用常规观测资料、NCEP再分析资料及FY-2E卫星云图,对2014年4月24~25日甘肃河东地区一次大范围雨雪冰冻天气过程作综合诊断分析.结果表明:500 hPa乌拉尔山脊前冷空气积聚造成的阻塞脊崩溃,促使其东部横槽转竖南压,引导冷空气大举南下,为此次强雨雪天气提供了大尺度环流背景;700 hPa冷槽和中尺度切变线、地面冷锋、地面冷高压,是引发此次大范围强雨雪天气的直接影响系统.700 hPa上90%以上的相对湿度、强水汽输送通道和低层持续的水汽辐合,是形成此次强雨雪天气的重要水汽条件;降雪前河东北部地区的骤烈降温为此过程提供了雨雪转换和水汽凝结条件;冷暖空气交汇与对峙、锋区逆温为此次强雨雪天气过程提供了重要热力机制;强烈的上升运动及其维持与增强,为此次天气过程提供了有力的动力机制.热力不稳定参数及温度平流的高低空分布一定程度上反映出暴雪区上空层结的不稳定性;云顶亮温(TBB)的分布及负垂直速度所达的高度均反映出此次过程的对流性特征;OLR和TBB的演变对此次降水有很好的指示意义.%Based on the conventional observation,NCEP reanalysis data and values of TBB and OLR of FY-2E,the comprehensive di-agnostic analysis of a wide range and heavy snow,rain and freezing weather process from 24 to 25 April 2014 in eastern Yellow River of Gansu Province was done.The results show that the cold air on 500 hPa in front of the Ural mountains blocking high ridge accumula-ted and caused the collapse of blocking ridge,which made the transverse trough in eastern Ural Mountains to turn vertical trough and move southward,then guided a massive cold air to southward,therefore all of the above provided a large-scale circulation background for the heavy rain and snow weather process.The influence systems of the cold trough and mesoscale shear line on 700 hPa,ground cold front and cold high directly triggered the heavy snow and rain weather.The relative humidity above 90%on 700 hPa,high humid-ity column,strong moisture transport channels and persistent moisture convergence at low-level were the important water vapor condi-tion to cause the weather process.The suddenly strong declining temperature before the snowfall in northern of Yellow River of Gansu provided the rain and snow conversion and mositure condensation conditions for the weather process.Simultaneously,the intersection and confrontation of the cold and warm air and temperature inversion in frontal zone provided the important thermal mechanism,and the strong upward motions and its sustaining and strengthening provided the powerful dynamic mechanism.The thermal instability parame-ters and distribution of temperature advection at upper and low levels reflected the atmospheric instability to some extent.The distribu-tion of TBB and highest height of negative vertical velocity reflected the convection features of the weather process,and the evolutions of OLR and TBB were good predictor for the weather process.
    • 李靓; 胡啸; 王小光; 康志明
    • 摘要: Based on the conventional meteorological observation data,NCEP/NCAR 1°×1°monthly mean reanalysis data,the outgoing long-wave radiation (OLR)data observed by the NOAA satellite and the data from the Typhoon Yearbook of China Meteorological Administration,this paper analyzed the causes for the no generation of tropical cyclones (TCs)in the northwestern Pacific and South China Sea (SCS)in Au-gust 2014.The results show that the invading of the polar cold air led to the further eastward and south-ward movement of the subtropical high in northwestern Pacific during the first twenty days in August.In the last ten days the cold air became weaker,then the subtropical high moved westward and southward, driving the convergence zone between the easterly trade wind in the south side of the subtropical high and the equatorial westerly to be located abnormally further southward than normal.The weaker Miscarene high caused the Somali jet and the cross-equatorial flow over the eastern Indian Ocean to get weakened,and the low- and mid-level monsoon depression or monsoon trough over the Indian Peninsula to be ex-tremely inactive.Additionally,along with the weaker Australian high and its position deviation,the cross-equatorial flow over the southern SCS became weaker too.The SST of the tropical cyclone genesis was much lower than normal during the first dekad of August,so the warm and moist air in the area with lower SST could not form.In addition,the weak convection in the northwestern Pacific and SCS,the stable at-mosphere and large vertical wind shear were unfavorable for the generation and development of tropical cy-clone.In the lower level over the ocean between SCS and the east of Philippines,there was positive vortic-ity and negative divergence,but the convergence was not strong enough for the formation or development of TC.The weak updraft at the high-level troposphere caused by the South Asia high and the easterly dis-turbance south to the subtropical high could not accomplish the upper-level divergence process,being diffi-cult to support the maintenance and intensification of the upward flow.Hence,the four tropical disturb-ances in the abnormally southward ITCZ did not develop into tropical cyclones.%利用常规气象观测资料、NCEP/NCAR 1°×1°的月平均再分析资料、NOAA卫星观测的OLR资料和中国气象局台风年鉴资料,对2014年8月西北太平洋和南海无TC生成的原因进行了诊断分析,结果表明:极地冷空气南侵,造成8月上中旬副热带高压偏东偏南,下旬冷空气减弱,副热带高压偏西偏南,致使副热带高压南侧偏东信风与赤道西风的汇合区位置异常偏南;马斯克林高压偏弱,导致索马里急流和东印度洋越赤道气流也弱,印度半岛中低层季风低压或季风槽极其不活跃。澳大利亚高压路径偏东或偏西和势力偏弱,则南海南部越赤道气流亦弱。8月上中旬台风主要源地的海表温度明显偏低,不能酿成低层高温高湿的大气;月内西北太平洋和南海大气的对流活动很弱,层结较稳定、风速垂直切变大,均不利于TC 发生发展。在南海到菲律宾以东洋面低层为弱的正涡度区和负散度区,有辐合上升运动,但垂直速度很小,不能满足TC尺度的环流发生和发展;南亚高压和副高南侧东风扰动造成对流层高层为弱上升区,不能形成高空辐散机制,不利于上升气流维持和加强。故此,8月在异常偏南的ITCZ中生成的4个热带扰动最终均未能发展成台风。
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