本文利用2007~2010年整四年最新可利用的CloudSat卫星资料, 对东亚地区(15°~60°N, 70°~150°E)云的微物理量包括冰/液态水含量、冰/液态水路径、云滴数浓度和有效半径等的分布特征和季节变化进行了分析。本文将整个东亚地区划分为北方、南方、西北、青藏高原地区和东部海域五个子区域进行研究, 结果显示:东亚地区冰水路径值的范围基本在700 g m-2以下, 高值区分布在北纬40度以南区域, 在南方地区夏季的平均值最大, 为394.3 g m-2, 而在西北地区冬季的平均值最小, 为78.5 g m-2;而液态水路径的范围基本在600 g m-2以下, 冬季在东部海域的值最大, 达到300.8 g m-2, 夏季最大值为281.5 g m-2, 分布在南方地区上空。冰水含量的最高值为170 mg m-3, 发生在8 km附近, 南方地区夏季的值达到最大, 青藏高原地区的季节差异最大;而液态水含量在东亚地区的范围小于360 mg m-3, 垂直廓线从10 km向下基本呈现逐渐增大的趋势, 峰值位于1~2 km高度上。冰云云滴数浓度在东亚地区的范围在150 L-1以下, 水云云滴数浓度的值小于80 cm-3, 垂直廓线的峰值均在夏季最大。冰云有效半径在东亚地区的最大值为90 μm, 发生在5 km左右;水云有效半径在东亚地区的值分布在10 km以下, 最大值为10~12 μm, 基本位于1~2 km高度上。从概率分布函数来看, 东亚地区冰/水云云滴数浓度的分布呈现明显的双峰型, 其他量基本为单峰型。本文的结果可以为全球和区域气候模式在东亚地区对以上云微物理量的模拟提供一定的观测参考依据
References
[1]
Austin R T.2007.Level 2B radar-only cloud water content (2B-CWC-RO) process description document[R].CloudSat project report.
[2]
Chen Y H, Peng K J, Huang J P, et al.2010.Seasonal and regional variability of cloud liquid water path in northwestern China derived from MODIS/CERES observations[J].Int.J.Remote Sens., 31 (4):1037-1042.
[3]
傅云飞, 宇如聪, 崔春光, 等.2007.基于热带测雨卫星探测的东亚降水云结构特征的研究[J].暴雨灾害, 26 (1):9-20.Fu Yunfei, Yu Rucong, Cui Chunguang, et al.2007.The structure characteristics of precipitating clouds over the East Asia based on TRMM measurements[J].Torrential Rain and Disasters (in Chinese), 26 (1):9-20.
[4]
黄梦宇, 赵春生, 周广强, 等.2005.华北地区层状云微物理特性及气溶胶对云的影响[J].南京气象学院学报, 28 (3):360-368.Huang Mengyu, Zhao Chunsheng, Zhou Guangqiang, et al.2005.Stratus cloud microphysical characters over North China region and the relationship between aerosols and clouds[J].Journal of Nanjing Institute of Meteorology (in Chinese), 28 (3):360-368.
[5]
Hughes N A.1984.Global cloud climatologies:A historical review[J].J.Climate Appl.Meteor., 23 (5):724-751.
[6]
李积明, 黄建平, 衣育红, 等.2009.利用星载激光雷达资料研究东亚地区云垂直分布的统计特征[J].大气科学, 33 (4):698-707.Li Jiming, Huang Jianping, Yi Yuhong, et al.2009.Analysis of vertical distribution of cloud in East Asia by space-based LiDAR data[J].Chinese Journal of Atmospheric Sciences (in Chinese), 33 (4):698-707.
[7]
Liou K N.2004.大气辐射导论[M].北京:气象出版社.Liou K N.2004.An Introduction to Atmospheric Radiation (in Chinese)[M].Beijing:China Meteorological Press.
[8]
刘瑞霞, 刘玉洁, 杜秉玉.2004.中国云气候特征的分析[J].应用气象学报, 15 (4):468-476.Liu Ruixia, Liu Yujie, Du Bingyu.2004.Cloud climatology characteristics of China from ISCCP data[J].Quarterly Journal of Applied Meteorology (in Chinese), 15 (4):468-476.
[9]
Liu Q, Fu Y F, Yu R C, et al.2008.A new satellite-based census of precipitating and nonprecipitating clouds over the tropics and subtropics[J].Geophys.Res.Lett., 35 (7), doi:10.1029/2008GL033208.
[10]
Luo Y L, Zhang R H, Wang H.2009.Comparing occurrences and vertical structures of hydrometeors between eastern China and the Indian monsoon region using CloudSat/CALIPSO data[J].J.Climate, 22 (4):1052-1064.
[11]
彭杰, 沈新勇, 王志立, 等.2010.中国地区云的观测研究进展[J].安徽农业科学, 38 (24):13070-13073.Peng Jie, Shen Xinyong, Wang Zhili, et al.2010.Overview of observational researches on clouds over China[J].Journal of Anhui Agricultural Sciences (in Chinese), 38 (24):13070- 13073.
[12]
彭杰, 张华, 沈新勇.2013.东亚地区云垂直结构的CloudSat卫星观测研究[J].大气科学, 37 (1):91-100.Peng Jie, Zhang Hua, Shen Xinyong.2013.Analysis of vertical structure of clouds in East Asia with CloudSat data[J].Chinese Journal of Atmospheric Sciences (in Chinese), 37 (1):91-100.
[13]
Peng J, Zhang H, Li Z Q.2014.Temporal and spatial variations of global deep cloud systems based on CloudSat and CALIPSO satellite observations[J].Adv.Atmos.Sci., 31 (3):593-603.
[14]
Protat A, Delano？ J, O\'Connor E J, et al.2010.The evaluation of CloudSat and CALIPSO ice microphysical products using ground-based cloud radar and lidar observations[J].J.Atmos.Oceanic Technol., 27 (5):793-810.
[15]
尚博.2011.利用CloudSat对华北、江淮云垂直结构及降水云特征的研究[D].南京信息工程大学硕士学位论文.Shang Bo.2011.Research on vertical structure of cloud and precipitation feature of CloudSat data in Huabei and Jianghuai[D].M.S.thesis (in Chinese), Nanjing Univercity of Information Science and Technology.
[16]
Stephens G L, Vane D G, Tanelli S, et al.2008.CloudSat mission:Performance and early science after the first year of operation[J].J.Geophys.Res., 113, D00A18, doi:10.1029/2008JD009982.
[17]
Wang C C, Chen G T J, Carbone R E.2004.A climatology of warm-season cloud patterns over East Asia based on GMS infrared brightness temperature observations[J].Mon.Wea.Rev., 132 (7):1606-1629.
[18]
汪会, 罗亚丽, 张人禾.2011.用CloudSat/CALIPSO资料分析亚洲季风区和青藏高原地区云的季节变化特征[J].大气科学, 35 (6):1117- 1131.Wang Hui, Luo Yali, Zhang Renhe.2011.Analyzing seasonal variation of clouds over the Asian monsoon regions and the Tibetan Plateau region using CloudSat/CALIPSO data[J].Chinese Journal of Atmospheric Sciences (in Chinese), 35 (6):1117-1131.
[19]
吴涧, 刘佳.2011.近二十年全球变暖背景下东亚地区云量变化特征分析[J].热带气象学报, 27 (4):551-559.Wu Jian, Liu Jia.2011.Trend of cloud amount in East Asia under the backdrop of global warming in the past 20 years[J].Journal of Tropical Meteorology (in Chinese), 27 (4):551-559.
[20]
杨大生, 王普才.2012.中国地区夏季6~8月云水含量的垂直分布特征[J].大气科学, 36 (1):89-101.Yang Dasheng, Wang Pucai.2012.Characteristics of vertical distributions of cloud water contents over China during summer[J].Chinese Journal of Atmospheric Sciences (in Chinese), 36 (1):89-101.
[21]
杨冰韵, 张华, 彭杰, 等.2014.利用CloudSat卫星资料分析云微物理和光学性质的分布特征[J].高原气象, 33 (4):1105-1118.Yang Bingyun, Zhang Hua, Peng Jie, et al.2014.Analysis on global distribution characteristics of cloud microphysical and optical properties based on the CloudSat data[J].Plateau Meteorology (in Chinese), 33 (4):1105-1118.
[22]
Zhang H, Peng J, Jing X W, et al.2013.The features of cloud overlapping in eastern Asia and their effect on cloud radiative forcing[J].Sci.China Earth Sci., 56 (5):737-747, doi:10.1007/s11430-012-4489-x.
[23]
张华, 彭杰, 荆现文, 等.2013.东亚地区云的垂直重叠特性及其对云辐射强迫的影响[J].中国科学:地球科学, 43 (4):523-535.Zhang Hua, Peng Jie, Jing Xianwen, et al.2013.The features of cloud overlapping in eastern Asia and their effect on cloud radiative forcing[J].Science China:Earth Sciences, 56 (5):737-747.
[24]
赵柏林, 彭欣荣, 朱元竞.1994.卫星遥感东亚地区云辐射与气候[J].北京大学学报(自然科学版), 30 (3):361-374.Zhao Bolin, Peng Xinrong, Zhu Yuanjing.1994.Satellite observation of cloud radiation on climate in East Asia[J].Acta Scicentiarum Naturalum Universitis Pekinesis (in Chinese), 30 (3):361-374.
[25]
周毓荃, 赵姝慧.2008.CloudSat卫星及其在天气和云观测分析中的应用[J].南京气象学院学报, 31 (5):603-614.Zhou Yuquan, Zhao Shuhui.2008.CloudSat satellite and its application in weather and cloud observation[J].Journal of Nanjing Institute of Meteorology (in Chinese), 31 (5):603-614.
