使用热带测雨卫星(TRMM)搭载的测雨雷达(PR)2004—2014年长达11a的连续观测资料对青藏高原东南缘川渝地区不同季节不同降水类型的垂直结构特征进行了统计分析,并建立了相应的气候态反射率垂直廓线(Vertical Profiles of Reflectivity,简...使用热带测雨卫星(TRMM)搭载的测雨雷达(PR)2004—2014年长达11a的连续观测资料对青藏高原东南缘川渝地区不同季节不同降水类型的垂直结构特征进行了统计分析,并建立了相应的气候态反射率垂直廓线(Vertical Profiles of Reflectivity,简称VPR)。结果表明,由于不同的微物理及动力过程,降水类型对反射率垂直廓线的结构特征影响很大,90%的层云0℃层亮带峰值强度低于32dBz,50%的对流云最大反射率强度超过35dBz。降水类型及强度均对反射率垂直廓线的形状影响很大,层云系统发生中及大雨时其冰雪区的聚合反应效率明显较发生小雨时高。反射率垂直廓线特征参数具有一定的区域性和季节特征,且地表加热和地形高度的作用会加强上升气流对反射率垂直廓线形态的影响,上升气流的强度影响着冰雪及雨水区的碰并增长率以及低层的蒸发作用,从而进一步影响低层雨区的反射率垂直廓线斜率,边界层的相对湿度是另一个影响雨区反射率垂直廓线斜率及蒸发率的重要因素。星载测雨雷达的云分类算法在青藏高原东南缘地区受到一定的挑战,仍有改进的空间;未来可以将基于星载测雨雷达建立气候态层云典型反射率垂直廓线应用于联合地基天气雷达网观测以弥补后者在复杂地形条件下探测范围及能力受限的缺陷,从而改进雷达定量降水估测的误差。展开更多
In this report,we outline works done by scientists from the Mainland of China on various ionospheric topics after the release of the National Report of China in 2020 on ionospheric researchto the Committee on Space Re...In this report,we outline works done by scientists from the Mainland of China on various ionospheric topics after the release of the National Report of China in 2020 on ionospheric researchto the Committee on Space Research(COSPAR).More than 170 papers were published in 2020-2021.The current report covers the following topics:ionospheric space weather,ionospheric structures and climatology,ionospheric dynamics and couplings,ionospheric irregularity and scintillation,modeling and data assimilation,and ionosphere and sounding techniques.Planetary ionospheres are included for the first time.展开更多
The Chinese Meridian Project is a ground-based space environment monitoring facility in China.The first phase of the project has been put into formal operation since 2012 after 4-year’s construction.It consists of 15...The Chinese Meridian Project is a ground-based space environment monitoring facility in China.The first phase of the project has been put into formal operation since 2012 after 4-year’s construction.It consists of 15 observatories located roughly along 120°E longitude and 30°N latitude,with each observatory equipped with multiple instruments to monitor space environment.Based on the huge observational data accumulated,significant scientific achievements have been made with more than 300 peer-reviewed journal papers published.In this report,scientific results from the past two years have been reviewed with topics covering fields of geomagnetic,atmosphere,ionosphere,and their responses to solar activities.The excellent achievements from the Phase I of Chinese Meridian Project lay a good foundation for Phase II,which has already been approved with the official kick-off of construction in November 2019.It will conceive an unprecedented contribution to global space weather community from China.展开更多
This paper reviews various progresses on the ionospheric studies by the scientists in China during the last two years.The main contents concern the 4 aspects of the ionospheric re-search:(1) ionospheric weather and co...This paper reviews various progresses on the ionospheric studies by the scientists in China during the last two years.The main contents concern the 4 aspects of the ionospheric re-search:(1) ionospheric weather and coupling with magnetosphere(polar and auroral ionosphere,ionospheric response to substorms,ionospheric storms);(2) mid-and low-latitude ionospheric clima-tology(ionospheric properties,yearly variations and solar activity dependence,long term variation);(3) ionospheric coupling with neutral atmosphere(gravity waves,tides,planetary waves,background upper atmosphere,and ionospheric response);and(4) ionospheric diagnostics(observation,modeling,and prediction).展开更多
In the ionospheric research,various progresses have been made during the last two years.This paper reviews the recent works of Chinese scientists.For convenience,the contents include:ionospheric storms and space weath...In the ionospheric research,various progresses have been made during the last two years.This paper reviews the recent works of Chinese scientists.For convenience,the contents include:ionospheric storms and space weather;ionospheric irregularities and scintillation;ionospheric variability;ionospheric disturbances;ionospheric response to solar eclipses;ionospheric coupling with atmosphere and lithosphere;ionospheric climatology;ionospheric modeling;and ionospheric prediction and application.展开更多
文摘使用热带测雨卫星(TRMM)搭载的测雨雷达(PR)2004—2014年长达11a的连续观测资料对青藏高原东南缘川渝地区不同季节不同降水类型的垂直结构特征进行了统计分析,并建立了相应的气候态反射率垂直廓线(Vertical Profiles of Reflectivity,简称VPR)。结果表明,由于不同的微物理及动力过程,降水类型对反射率垂直廓线的结构特征影响很大,90%的层云0℃层亮带峰值强度低于32dBz,50%的对流云最大反射率强度超过35dBz。降水类型及强度均对反射率垂直廓线的形状影响很大,层云系统发生中及大雨时其冰雪区的聚合反应效率明显较发生小雨时高。反射率垂直廓线特征参数具有一定的区域性和季节特征,且地表加热和地形高度的作用会加强上升气流对反射率垂直廓线形态的影响,上升气流的强度影响着冰雪及雨水区的碰并增长率以及低层的蒸发作用,从而进一步影响低层雨区的反射率垂直廓线斜率,边界层的相对湿度是另一个影响雨区反射率垂直廓线斜率及蒸发率的重要因素。星载测雨雷达的云分类算法在青藏高原东南缘地区受到一定的挑战,仍有改进的空间;未来可以将基于星载测雨雷达建立气候态层云典型反射率垂直廓线应用于联合地基天气雷达网观测以弥补后者在复杂地形条件下探测范围及能力受限的缺陷,从而改进雷达定量降水估测的误差。
基金Supported by National Natural Science Foundation of China(42030202,42188101,42122031)。
文摘In this report,we outline works done by scientists from the Mainland of China on various ionospheric topics after the release of the National Report of China in 2020 on ionospheric researchto the Committee on Space Research(COSPAR).More than 170 papers were published in 2020-2021.The current report covers the following topics:ionospheric space weather,ionospheric structures and climatology,ionospheric dynamics and couplings,ionospheric irregularity and scintillation,modeling and data assimilation,and ionosphere and sounding techniques.Planetary ionospheres are included for the first time.
基金Supported by the Open Research Project of Large Research Infrastructures of Chinese Academy of Sciences,the Study on the Interaction between Low/Mid-latitude Atmosphere and Ionosphere Based on the Chinese Meridian Project,and the Chinese Meridian Project。
文摘The Chinese Meridian Project is a ground-based space environment monitoring facility in China.The first phase of the project has been put into formal operation since 2012 after 4-year’s construction.It consists of 15 observatories located roughly along 120°E longitude and 30°N latitude,with each observatory equipped with multiple instruments to monitor space environment.Based on the huge observational data accumulated,significant scientific achievements have been made with more than 300 peer-reviewed journal papers published.In this report,scientific results from the past two years have been reviewed with topics covering fields of geomagnetic,atmosphere,ionosphere,and their responses to solar activities.The excellent achievements from the Phase I of Chinese Meridian Project lay a good foundation for Phase II,which has already been approved with the official kick-off of construction in November 2019.It will conceive an unprecedented contribution to global space weather community from China.
文摘This paper reviews various progresses on the ionospheric studies by the scientists in China during the last two years.The main contents concern the 4 aspects of the ionospheric re-search:(1) ionospheric weather and coupling with magnetosphere(polar and auroral ionosphere,ionospheric response to substorms,ionospheric storms);(2) mid-and low-latitude ionospheric clima-tology(ionospheric properties,yearly variations and solar activity dependence,long term variation);(3) ionospheric coupling with neutral atmosphere(gravity waves,tides,planetary waves,background upper atmosphere,and ionospheric response);and(4) ionospheric diagnostics(observation,modeling,and prediction).
文摘In the ionospheric research,various progresses have been made during the last two years.This paper reviews the recent works of Chinese scientists.For convenience,the contents include:ionospheric storms and space weather;ionospheric irregularities and scintillation;ionospheric variability;ionospheric disturbances;ionospheric response to solar eclipses;ionospheric coupling with atmosphere and lithosphere;ionospheric climatology;ionospheric modeling;and ionospheric prediction and application.
