The CloudSat observational dataset provides an important opportunity to study snowfall, and there have been numerous investigations making use of CloudSat for snowfall-related research. Based on the data of 2B-CLDCLASS, 2B-CWC-RVOD and 2C-SNOW-PROFILE and the precipitation data of the ground observation stations, the macro and micro physical properties of the clouds before and during the snowfall were compared and analyzed in 21 heavy snowfall events in the northern Xinjiang, China. In the paper, the northern Xinjiang was divided into the western and the central region along Tianshan Mountains. Firstly, all the sites which had precipitation reached to heavy snowstorm in 24 hours were selected in the northern Xinjiang from 2008 to 2015. Then, according to the specific dates of the snowfall and the latitude and longitude of the sites, those sites which had CloudSat passed their territory were selected as the research object and there were 21 cases obtained. Out of the 21 cases there were 12 cases with the satellite passing their territories while the snowfall was occurring, and 9 cases with the satellite passing their territories before snowfall. The distributions of microphysical properties, which include ice effective radius (IER), ice number concentration (INC), ice water content (IWC), snow water content (SWC) and snow rate (SR), were revealed through analyzing the clouds, cloud types of heavy snowfall and the relationship between cloud microphysical properties and snowfall. Before the heavy snowfall and during the heavy snowfall, the main cloud types were altostratus clouds, cumulus clouds, nimbostratus, stratus clouds, the convective clouds between altostratus clouds and deep stratus. The maximum of IER was 296.5 μm and the minimum was 28.4 μm. The mean of IER of ice cloud was 64.1 μm before the snowfall, and 62.3 μm in the snowfall. The IER before the snowfall was 7.1 % larger than that in the snowfall. The largest INC is 768.4 L-1, and the values of geometric mean range of INC were 41.2-76.5 L-1 before the snowfall, and 28.1-73.0 L-1 during the snowfall. The values of geometric mean range of IWC of ice cloud were 25.4-135.1 mg·m-3 before the snowfall, and 12.0-77.7 mg·m-3 during the snowfall. The largest IWC was 701.8 mg·m-3, and the smallest IWC was 1.0 mg·m-3. The mean values of SWC and SR were 28.0~88.0 mg·m-3 and 0.08~0.36 mm·h-1 respectively. The mean values of IER, INC, IWC, SWC and SR before the snowfall were respectively 2.9 %, 6.2 %, 34.4 %, 36.4 % and 18.7 % higher than those during the snowfall. The areas with larger values of the micro physical cloud properties are mainly concentrated in the western part of northern Xinjiang. This study had presented a comprehensive analysis of cloud vertical structures and regional variations before and during the heavy snowfall. The analysis of ice effective radius, ice number concentration, ice water content, snow water content and snow rate also helps understand the artificial snow augmentation.
WANG Zhi-min, FENG Wan-yue, LI Yuan-yuan, CHU Chang-jiang, XU Wen-xia, CHENG Yong-hang
. Cloud structure characteristics in heavy snowfall days in northern Xinjiang using Cloudsat satellite data[J]. Arid Land Geography, 2019
, 42(2)
: 244
-251
.
DOI: 10.12118/j.issn.1000-6060.2019.02.03
[1] 李效收. 1961-2010年新疆降雪的变化特征[D]．西北师范大学，2013．[LI Xiaosho．Changing Characteristics of Snowfall in Xinjiang from 1961 to 2010[D]．Northwest Normal University，2013．]<br />
[2] 赵俊荣，郭金强．天山北坡中部一次罕见特大暴雪天气成因[J]．干旱气象，2010(04)：438-442．[ZHAO Junrong，GUO Jinqiang. A rare blizzard weather in the middle of the northern slope of the Tianshan Mountains [J]．Joumal of Arid Meteorology, 2010(04)：438-442．]<br />
[3] 张书萍，祝从文．2009年冬季新疆北部持续性暴雪的环流特征及其成因分析[J]. 大气科学, 2011，35(5)：833-846．[ZHANG Shuping，ZHU Congwen．Possible causes of circulation anomalies associated with subsequent snowstorms over the north of Xinjiang during Winter 2009 [J]．Chinese Journal of Atmospheric Sciences．2011，35(5)：833-846．]<br />
[4] 李如琦，唐冶．2010年新疆北部暴雪异常的环流和水汽特征分析[J]．高原气象，2015，34(1)：155-162．[LI Ruqi，TANG Ye．Atmospheric circulation and water vapor characteristics of snowstorm anomalies in northern Xinjiang in 2010[J]．Plateau Meteorology．2015，34(1)：155-162．]<br />
[5] 庄晓翠，李博渊，张林梅，等．新疆阿勒泰地区冬季大到暴雪气候变化特征[J]．干旱区地理，2013，36(6)：1013-1022．[ZHUANG Xiaocui，LI Boyuan，ZHANG Lihai，et al．Heavy snowstorm characteristics of climatic change in winter in Altay Prefecture， Xinjiang[J]．Arid Land Geography．2013，36(6)：1013-1022．]<br />
[6] 张俊兰，崔彩霞，陈春艳．北疆典型暴雪天气的水汽特征研究[J]．高原气象，2013，32(4)：1115-1125．[ZHANG Junlan，CUI Caixia，CHENG Chunyan．Study on water vapor characteristic of typical heavy snowstorm case in northern Xinjiang[J]．Plateau Meteorology．2013，32(4)，1115-1125．]<br />
[7] 于晓晶，于志翔，唐永兰，等．不同云微物理方案对新疆冷锋暴雪的预报影响分析[J]．暴雨灾害，2017，36(1)：33-41．[YU Xiaojing，YU Zhixiang，TANG Yonglan，et al．Influence of different cloud microphysical schemes on forecasts of a cold-font snowstorm in Xinjiang[J]．Torrential Rain and Disasters，2017，36(1)：33-41．]<br />
[8] 杨莲梅，刘雯．新疆北部持续性暴雪过程成因分析[J]．高原气象，2016，35(2)：507-519．[YANG Lianmei，LIU Wen.Cause analysis of persistent heavy snow processes in the northern Xinjiang[J]．Plateau Meteorology，2016，35(2)：507-519．]<br />
[9] 刘惠云，崔彩霞，李如琦．新疆北部一次持续暴雪天气过程分析[J]．干旱区研究，2011，28(2)：282-287．[LIU Huiyun，CUI Caixia，LI Ruqi．Analysis of a continuous snowstorm weather process in northern Xinjiang[J]．Arid Zone Research，2011，28(2)：282-287．]<br />
[10] 马占山，秦琰琰．云探测卫星CloudSat[J]．气象，2008，34(8)：104-111．[Ma Zhanshan Qin Yanyan．Introductions to a new type cloud detecting satellite--Cloudsat [J]．Meteorological，2008，34(8)：104-111．]<br />
[11] 周毓荃，赵姝慧．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， 2008，31(5)：603-614．[ZHOU Yuquan，ZHAO Shuhui．Cloudsat satellite and its application in weather and cloud observation[J]．Journal of Nanjing Institute of Meteorology，2008，31(5)：603-614．]<br />
[12] 冯建东，武志婷，彭宽军，等．基于CloudSat卫星资料的新疆三大山区不同类型云高特征研究[J]．冰川冻土，2014，36(2)：310-317．[FENG Jiandong，WU Zhiting，Peng Kuanjun，et al．Variations in the heights of different clouds over three major mountains in Xinjiang based on Cloudsat observation[J]．Journal of Glaciology and Geocryology， 2014，36(2)：310-317．]<br />
[13] 张晓，段克勤，石培宏．基于CloudSat卫星资料分析青藏高原东部夏季云的垂直结构[J]．大气科学，2015(6)：1073-1080．[Zhang Xiao，Duan Keqin，Shi Peihong．Cloud vertical profiles from Cloudsat data over the eastern Tibetan Plateau during summer [J]．Chinese Journal of Atmospheric Sciences , 2015(6)：1073-1080．]<br />
[14] 钟水新，王东海，张人禾，等．基于CloudSat资料的冷涡对流云带垂直结构特征[J]．应用气象学报，2011，22(3)：257-264．[ZHONG Shuixin，Wang Donghai，Zhang Renhe，et al．Vertical structure of convective cloud in a cold vortex over northeastern China using Cloudsat data[J]．Journal of Applied Meteorological Science. 2011，22(3)：257-264．]<br />
[15] 王帅辉，韩志刚，姚志刚，等．基于CloudSat资料的中国及周边地区各类云的宏观特征分析[J]．气象学报，2011，69(5)：883-899．[Wang Shuaihui，Han Zhigang，Yao Zhigang，et al．Analysis of cloud types and macroscopic characteristics over China and its neighborhood based on the Cloudsat data[J]．Acta Meteorologica Sinica，2011，69(5)：883—899．]<br />
[16] 邓军英，丁明月，王文彩，等．冰云粒子微物理属性在一次强降雨过程中的垂直分布[J]．干旱区地理，2016，39(03)：590-599．[Deng Junying，Ding Mingyue，Wang Wencai，et al．The vertical distribution of microphysical properties of ice cloud particles in a strong rainfall process[J]．Arid Land Geography，2016，39(03)：590-599．]<br />
[17] 光莹，邓军英，陈勇航，等．层状云微物理属性垂直分布的季节变化——以新疆地区为例[J].干旱区地理，2017，40(04)：754-761．[ Guang Ying，Deng Junying，Chen Yonghang，et al. Seasonal variation of vertical distribution of layered cloud microphysical properties——Taking Xinjiang region as an example[J]．Arid Land Geography，2017，40(04)：754-761．]<br />
[18] 王旭，张嘉伟，马禹，等．天山山脉强降水云宏微观物理属性的空间分布特征[J]．干旱区地理，2016，39(06)：1153-1161．[Wang Xu，Zhang Jiawei，Ma Wei，et al．Spatial distribution characteristics of microscopic physical properties of heavy precipitation Yunhong in Tianshan Mountains[J]．Arid Land Geography，2016，39(06)：1153-1161．]<br />
[19] 陈勇航，邓军英，张萍，等．中天山附近强降雨过程中云冰水含量随高度变化特征[J]．资源科学，2013，35(3)：655-664．[CHEN Yonghang，DENG Junying，ZHANG Ping，et al．Vertical distribution of ice water content in clouds during heavy rains around Tianshan Mountain [J]．Resources Science，2013，35(3)：655-664．]<br />
[20] 刘岩，马骁骏，李浩，等．基于CloudSat和Aqua卫星资料的北疆一次暴雪过程中云的宏微观物理属性[J]．沙漠与绿洲气象，2015(2)：9-15．[LIU Yan，MA Xiaojun，LI Hao，et al．Cloud macro and micro physical properties during a snowstorm based on cloudsat and aqua satellite data[J]．Desert and Oasis Meteorology，2015(2)：9-15．]<br />
[21] 陈英英，武文辉，唐仁茂，等．利用Cloudsat卫星资料分析冻雨天气的云结构[J]．气象， 2011，37(6)：707-713．[CHEN Yingyin，WU Wenhui，TANG Renma，et al．Analysis on the cloud structure of freezing precipitation using Cloudsat satellite data[J]．Meteorological，2011，37(6)：707-713．]<br />
[22] MARK S．KULE，LISAMILANI，NORMANB．WOOD，et al．A shallow cumuliform snowfall census using spaceborne radar[J]．Journal of Hydrometeorology．(1261-1279)：2016(16).<br />
[23] SHENG CHEN，YANG HONG，MARK KULIE，et al．Comparison of snowfall estimates from the NASA Cloudsat cloud profiling radar and NOAA/NSSL multi-radar multi-sensor system[J]．Journal of Hydrology．(862–872)：2016(541)．]<br />
[24] SERGEY Y．MATROSOV，MATTHEW D.SHUPE，et al．Snowfall retrievals using millimeter-wavelength cloud radars[J]．Journal of Applied Meteorology And Climatology．(769-777)：2008(47)．]<br />
[25] 梁军，张胜军，王树雄，等．大连地区一次区域暴雪的特征分析和数值模拟[J]．高原气象， 2010(03)：744-754．[LIANG Jun， ZHANG Shengjun，et al．Characteristic analysis and numerical simulation of a snowstorm in Dalian Region[J]．Plateau Meteorology，2010(03)：744-754．]<br />
[26] 邓军英．云卫星在降水云研究中的应用[D]．东华大学，2014．[Deng Junying．Application of Cloudsat in the study of precipitation clouds[D]．DongHua University，2014．]<br />
[27] 李宝东，孙玉稳，孙霞，等．河北春季一次飞机人工增雪的综合分析［J］．干旱气象，2014，32(5)：819－829．［LI Baodong，SUN Yuwen，SUN Xia，et al．Comprehensive analysis of aircraft artificial precipitation on stratiform clouds in spring over Hebei province［J]．Journal of Arid Meteorology，2014，32(5)：819－829．］<br />
[28] 孙玉稳，孙霞，刘伟，等．一次雨夹雪降水过程人工增水作业的综合观测研究[J]．气象，2015(11)：1341-1355．[SUN Yuwen，SUN Xia，LIU Wei，et al．Study of integrated observation on aircraft artificial operation during a sleet event[J]．Meteorological Monthly，2015(11)：1341-1355．]
