卢志贤,李昀英,方乐锌. 2016. 中国及周边海域对流云团的水平和垂直尺度[J]. 气象学报, 74(6):935-946, doi:10.11676/qxxb2016.074
中国及周边海域对流云团的水平和垂直尺度
Horizontal and vertical scales of convective clouds over China and the surrounding oceans
投稿时间:2016-03-14  修订日期:2016-08-29
DOI:10.11676/qxxb2016.074
中文关键词:  积云团  深对流云团  水平尺度  垂直尺度
英文关键词:Cumulus clouds  Deep convective clouds  Horizontal scale  Vertical scale
基金项目:国家自然科学基金(41475069、41075034)、科技部/财政部公益性行业(气象)科研专项(GYHY201306068)、公益性行业(气象)科研专项(GYHY201306016)。
作者单位E-mail
卢志贤 解放军理工大学气象海洋学院, 南京, 211101  
李昀英 解放军理工大学气象海洋学院, 南京, 211101 liyunying2005@163.com 
方乐锌 96211部队82分队, 建水, 654300  
摘要点击次数: 2257
全文下载次数: 1557
中文摘要:
      利用2007年1月-2010年12月CloudSat-CALIPSO二级云产品2B-CLDCLASS-LIDAR,统计中国及其周边海域对流云的发生频率,根据对流云发生频率的分布特征将中国及周边海域划分为青藏高原(TP)、东部陆地(EC)、南部海域(SO)和西北太平洋(WP)4个子区域,并研究了4个子区域积云团和深对流云团的水平尺度和垂直尺度。统计结果表明,海洋积云团的水平尺度约为2 km,陆地积云团的水平尺度约为1 km,海洋下垫面热力性质均匀,积云团尺度更大;陆地下垫面非均匀性强,积云团分布更为零散。深对流云团的水平尺度为10-50 km,东部陆地最大,约为45 km,西北太平洋最小,约为30 km。陆地深对流云团水平尺度较海洋上大,且多尺度特征显著,应该与深对流云发生的复杂天气背景有关。积云团的垂直尺度范围为0.24-2 km,4个区域无明显差异。垂直尺度海洋深对流云团大于陆地云团,其中在南部海域地区最大,约为15 km,青藏高原最小,约为10 km。与陆地云团相比,海洋深对流云团表现为水平尺度更小、垂直尺度更大的中尺度对流体特征。
英文摘要:
      Using the level 2 CloudSat-CALIPSO product 2B-CLDCLASS-LIDAR from January 2007 to December 2010, the occurrence frequencies of convective clouds over China and its surrounding oceans are calculated. Based on the frequencies, China and the surrounding oceans are first divided into four regions, i.e. the Tibetan Plateau region (TP), the eastern land region (EC), the southern ocean region (SO), and the Northwest Pacific region (WP). Horizontal and vertical scales of convective clouds over these four regions are then studied. Results show that the horizontal scales of cumulus clouds over the ocean and land are about 2 and 1 km respectively,indicating a more scattered feature over land than over the ocean.Cumulus clouds over the ocean show a larger scale because of the homogeneous thermodynamic property of ocean. Horizontal scales of deep convective clouds show a feature opposite to the cumulus clouds, the scale range is 10-50 km with the largest scale of approximately 45 km in EC, and the smallest scale of about 30 km in WP. The horizontal scale of deep convective clouds over land is larger than that over the ocean and displays a multi-scale feature, which is attributed to the complicated weather background over the ocean. The vertical scale of cumulus clouds is within the range of 0.24-2 km without obvious differences among the four sub-regions. The vertical scale of deep convective clouds over the ocean are deeper than that over the continent, with the maximum (15 km) in SO and the minimum (10 km) in the TP. Deep convective systems show a smaller and deeper range over the ocean than over land.
HTML   查看全文   查看/发表评论  下载PDF阅读器
分享按钮