中国及周边海域对流云团的水平和垂直尺度
发布时间：2018-10-14 11:32
【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2km,陆地积云团的水平尺度约为1km,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—50km,东部陆地最大,约为45km,西北太平洋最小,约为30km。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—2km,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15km,青藏高原最小,约为10km。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。
[Abstract]:From January 2007 to December 2010, CloudSat-CALIPSO secondary cloud product 2B-CLDCLASS-LIDARA was used to calculate the frequency of convective clouds in China and its surrounding sea areas. According to the distribution characteristics of convective cloud frequency, China and its surrounding sea areas are divided into four subregions, namely, (SO) in the southern part of land (EC), and (WP) in the northwest Pacific Ocean in the eastern part of the Qinghai-Xizang Plateau. The horizontal and vertical scales of cumulus cluster and deep convective cloud cluster in four subregions are studied. The statistical results show that the horizontal scale of the oceanic cumulus is about 2 km and that of the terrestrial cumulus is about 1 km. The thermal properties of the underlying surface of the ocean are uniform and the scale of the cumulus cluster is larger, and the surface heterogeneity of the terrestrial cumulus is stronger and the distribution of the cumulus cluster is more scattered. The horizontal scale of deep convective cloud cluster is 10-50 km, the largest land is about 45km in the eastern part, and the minimum is about 30km in the Northwest Pacific Ocean. The horizontal scale of the deep convective cloud cluster on land is larger than that of the ocean, and the multi-scale characteristic is obvious, which should be related to the complex weather background of the deep convective cloud. The vertical scale range of cumulus cloud cluster is 0.24-2km, and there is no obvious difference among the four regions. The vertical sea convective cloud cluster is larger than the land cloud cluster, and the largest is about 15 km in the southern sea area, and the smallest in the Qinghai-Xizang Plateau is about 10 km. Compared with the terrestrial cloud cluster, the ocean deep convective cloud cluster is characterized by mesoscale fluid characteristics with smaller horizontal scale and larger vertical scale.
【作者单位】： 解放军理工大学气象海洋学院;96211部队82分队;
【基金】：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)
【分类号】：P732
[Abstract]:From January 2007 to December 2010, CloudSat-CALIPSO secondary cloud product 2B-CLDCLASS-LIDARA was used to calculate the frequency of convective clouds in China and its surrounding sea areas. According to the distribution characteristics of convective cloud frequency, China and its surrounding sea areas are divided into four subregions, namely, (SO) in the southern part of land (EC), and (WP) in the northwest Pacific Ocean in the eastern part of the Qinghai-Xizang Plateau. The horizontal and vertical scales of cumulus cluster and deep convective cloud cluster in four subregions are studied. The statistical results show that the horizontal scale of the oceanic cumulus is about 2 km and that of the terrestrial cumulus is about 1 km. The thermal properties of the underlying surface of the ocean are uniform and the scale of the cumulus cluster is larger, and the surface heterogeneity of the terrestrial cumulus is stronger and the distribution of the cumulus cluster is more scattered. The horizontal scale of deep convective cloud cluster is 10-50 km, the largest land is about 45km in the eastern part, and the minimum is about 30km in the Northwest Pacific Ocean. The horizontal scale of the deep convective cloud cluster on land is larger than that of the ocean, and the multi-scale characteristic is obvious, which should be related to the complex weather background of the deep convective cloud. The vertical scale range of cumulus cloud cluster is 0.24-2km, and there is no obvious difference among the four regions. The vertical sea convective cloud cluster is larger than the land cloud cluster, and the largest is about 15 km in the southern sea area, and the smallest in the Qinghai-Xizang Plateau is about 10 km. Compared with the terrestrial cloud cluster, the ocean deep convective cloud cluster is characterized by mesoscale fluid characteristics with smaller horizontal scale and larger vertical scale.
【作者单位】： 解放军理工大学气象海洋学院;96211部队82分队;
【基金】：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)
【分类号】：P732
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