We derive the potential energy of gravity waves(GWs)in the upper troposphere and stratosphere at 45°S-45°N from December 2019 to November 2022 by using temperature profiles retrieved from the Constellation O...We derive the potential energy of gravity waves(GWs)in the upper troposphere and stratosphere at 45°S-45°N from December 2019 to November 2022 by using temperature profiles retrieved from the Constellation Observing System for Meteorology,Ionosphere,and Climate-2(COSMIC-2)satellite.Owing to the dense sampling of COSMIC-2,in addition to the strong peaks of gravity wave potential energy(GWPE)above the Andes and Tibetan Plateau,we found weak peaks above the Rocky,Atlas,Caucasus,and Tianshan Mountains.The land-sea contrast is responsible for the longitudinal variations of the GWPE in the lower and upper stratosphere.At 40°N/S,the peaks were mainly above the topographic regions during the winter.At 20°N/S,the peaks were a slight distance away from the topographic regions and might be the combined effect of nontopographic GWs and mountain waves.Near the Equator,the peaks were mainly above the regions with the lowest sea level altitude and may have resulted from convection.Our results indicate that even above the local regions with lower sea level altitudes compared with the Andes and Tibetan Plateau,the GWPE also exhibits fine structures in geographic distributions.We found that dissipation layers above the tropopause jet provide the body force to generate secondary waves in the upper stratosphere,especially during the winter months of each hemisphere and at latitudes of greater than 20°N/S.展开更多
利用2006—2012年北半球冬季低纬度地区(30°S^30°N)无线电探空站数据及全球大气成分和气候监测再分析数据对1000 h Pa^200 h Pa高度层的气象、电离层与气候星座观测系统全球定位系统掩星反演的比湿廓线进行了精度和可靠性验...利用2006—2012年北半球冬季低纬度地区(30°S^30°N)无线电探空站数据及全球大气成分和气候监测再分析数据对1000 h Pa^200 h Pa高度层的气象、电离层与气候星座观测系统全球定位系统掩星反演的比湿廓线进行了精度和可靠性验证。结果表明,水汽对气象、电离层与气候星座观测系统掩星反演影响较大,尤其在中、低对流层及热带地区等水汽含量比较大的地区,且气象、电离层与气候星座观测系统掩星数据在850 hpa以下可能并不太适用于评估其他数据。展开更多
介绍了利用GPS掩星资料反演大气重力波势能的方法,给出了从COSMIC(constellation observing system for meteorology, ionosphere and climate)干温廓线出发,扰动温度廓线提取及势能廓线反演的具体流程,进而对2011年夏季和冬季20~30 km...介绍了利用GPS掩星资料反演大气重力波势能的方法,给出了从COSMIC(constellation observing system for meteorology, ionosphere and climate)干温廓线出发,扰动温度廓线提取及势能廓线反演的具体流程,进而对2011年夏季和冬季20~30 km重力波势能的全球分布及季节变化特征进行了分析,结果与国内外已有文献基本一致。展开更多
掩星信号在传播过程中能够在地球表面发生反射,其反射信号中的低层大气信息在改进天气预报精准度和气候监测等方面存在很大的应用价值。基于COSMIC(constellation observing system for meteorology,ionosphere and climate)掩星廓线资...掩星信号在传播过程中能够在地球表面发生反射,其反射信号中的低层大气信息在改进天气预报精准度和气候监测等方面存在很大的应用价值。基于COSMIC(constellation observing system for meteorology,ionosphere and climate)掩星廓线资料,提取了2011-2015年中国区域的包含反射信号的掩星廓线,揭示了廓线分布具有内陆少、海洋多的规律,且具有夏季少、冬季多的季节性变化特征,内陆地区冰雪覆盖和海洋表面更有利于掩星信号反射。将中国近海海域按照5°×5°格网划分,进一步分析了格网内含反射信号的掩星廓线百分比时间序列与欧洲中期天气预报中心提供的再分析水汽和温度数据之间的相关性。结果表明,在10°N以北海域,掩星廓线反射信号百分比与再分析水汽数据和再分析温度数据均呈现负相关(相关系数约为-0.28~-0.58);而在10°N以南海域,受南海季风影响,掩星廓线反射信号百分比与再分析水汽数据有一定程度的正相关(相关系数约为0.32~0.34),与再分析温度数据没有显著相关性。展开更多
基金the National Natural Science Foundation of China(Grant Nos.41831073,42174196,and 42374205)the Project of Stable Support for Youth Team in Basic Research Field,Chinese Academy of Sciences(CAS+4 种基金Grant No.YSBR-018)the Informatization Plan of CAS(Grant No.CAS-WX2021PY-0101)the Youth Cross Team Scientific Research project of the Chinese Academy of Sciences(Grant No.JCTD-2021-10)the Open Research Project of Large Research Infrastructures of CAS titled“Study on the Interaction Between Low-/Mid-Latitude Atmosphere and Ionosphere Based on the Chinese Meridian Project.”This work was also supported in part by the Specialized Research Fund and the Open Research Program of the State Key Laboratory of Space Weather.
文摘We derive the potential energy of gravity waves(GWs)in the upper troposphere and stratosphere at 45°S-45°N from December 2019 to November 2022 by using temperature profiles retrieved from the Constellation Observing System for Meteorology,Ionosphere,and Climate-2(COSMIC-2)satellite.Owing to the dense sampling of COSMIC-2,in addition to the strong peaks of gravity wave potential energy(GWPE)above the Andes and Tibetan Plateau,we found weak peaks above the Rocky,Atlas,Caucasus,and Tianshan Mountains.The land-sea contrast is responsible for the longitudinal variations of the GWPE in the lower and upper stratosphere.At 40°N/S,the peaks were mainly above the topographic regions during the winter.At 20°N/S,the peaks were a slight distance away from the topographic regions and might be the combined effect of nontopographic GWs and mountain waves.Near the Equator,the peaks were mainly above the regions with the lowest sea level altitude and may have resulted from convection.Our results indicate that even above the local regions with lower sea level altitudes compared with the Andes and Tibetan Plateau,the GWPE also exhibits fine structures in geographic distributions.We found that dissipation layers above the tropopause jet provide the body force to generate secondary waves in the upper stratosphere,especially during the winter months of each hemisphere and at latitudes of greater than 20°N/S.
文摘利用2006—2012年北半球冬季低纬度地区(30°S^30°N)无线电探空站数据及全球大气成分和气候监测再分析数据对1000 h Pa^200 h Pa高度层的气象、电离层与气候星座观测系统全球定位系统掩星反演的比湿廓线进行了精度和可靠性验证。结果表明,水汽对气象、电离层与气候星座观测系统掩星反演影响较大,尤其在中、低对流层及热带地区等水汽含量比较大的地区,且气象、电离层与气候星座观测系统掩星数据在850 hpa以下可能并不太适用于评估其他数据。
文摘介绍了利用GPS掩星资料反演大气重力波势能的方法,给出了从COSMIC(constellation observing system for meteorology, ionosphere and climate)干温廓线出发,扰动温度廓线提取及势能廓线反演的具体流程,进而对2011年夏季和冬季20~30 km重力波势能的全球分布及季节变化特征进行了分析,结果与国内外已有文献基本一致。
文摘掩星信号在传播过程中能够在地球表面发生反射,其反射信号中的低层大气信息在改进天气预报精准度和气候监测等方面存在很大的应用价值。基于COSMIC(constellation observing system for meteorology,ionosphere and climate)掩星廓线资料,提取了2011-2015年中国区域的包含反射信号的掩星廓线,揭示了廓线分布具有内陆少、海洋多的规律,且具有夏季少、冬季多的季节性变化特征,内陆地区冰雪覆盖和海洋表面更有利于掩星信号反射。将中国近海海域按照5°×5°格网划分,进一步分析了格网内含反射信号的掩星廓线百分比时间序列与欧洲中期天气预报中心提供的再分析水汽和温度数据之间的相关性。结果表明,在10°N以北海域,掩星廓线反射信号百分比与再分析水汽数据和再分析温度数据均呈现负相关(相关系数约为-0.28~-0.58);而在10°N以南海域,受南海季风影响,掩星廓线反射信号百分比与再分析水汽数据有一定程度的正相关(相关系数约为0.32~0.34),与再分析温度数据没有显著相关性。
