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关键词:雷暴系统, 近地层, 垂直速度, 大尺度涡旋, 湍流输送摘要:
利用2012年5-9月中国科学院平凉陆面过程与灾害天气观测研究站的观测资料, 对比分析了黄土高原塬区夏季发生的阵风雷暴、 大风干雷暴和冰雹强降水雷暴过境期间近地层微气象特征。结果表明: 雷暴系统过境前几小时近地层便出现较强上升...
发表年度:2017 -
关键词:始预击穿过程, 双极性脉冲结构拟合, 脉冲电流模型, 青藏高原摘要:
利用2012年青海大通地区高精度闪电三维辐射源定位结果和宽带电场脉冲波形同步数据,基于3种改进的传输线模型和粒子群优化算法,拟合发生在不同距离上不同类型闪电初始预击穿过程的双极性脉冲波形结构,反演初始流光通道内电流波形和特...
发表年度:2017 -
关键词:潜热占比, 植被, 气候因子, 青藏高原摘要:
利用青藏高原北麓河观测站(退化高寒草甸)和玛曲观测站(高寒草原)2014年地面观测资料,通过组合分类法,对比分析了两类下垫面生长季土壤含水量、水汽压差和净辐射对地表能量分配的直接影响和间接影响,并且利用路径分析法研究了影响地表...
发表年度:2017 -
关键词:initial preliminary breakdown process, radiation pulse, charge structure, correlation analysis, Qinghai-Tibetan Plateau摘要:
Using synchronous data from a three-dimensional lightning VHF radiation source mapping system, broadband electric field changes, and the radiation intensity of lightning on the Qinghai-Tibetan Plateau, we divided th...
发表年度:2016 -
关键词:Northwestern China, Thunderstorm days, Water vapor flux, Environment condition摘要:
The annual trend in thunderstorm activity during a 42-year period from 1971 to 2012 over the transition region of the Tibetan Plateau and the Loess Plateau in China was documented. The delimiting factor was the numb...
发表年度:2016 -
关键词:Land use change, Air pollution, WRF, Mountain-valley circulation, Complex terrain, Lanzhou摘要:
Since 1999 Chinese government has made great effort to reforest the south and north mountains surrounding urban Lanzhou - a city located in a river valley, Northwestern China. Until 2009 obvious land use change occu...
发表年度:2016