内蒙古半干旱草原沙尘天气对近地层微气象学特征影响分析

摘要/Abstract

摘要： 利用锡林浩特国家气候观象台2011年4—5月近地层微气象、地表辐射和湍流通量观测数据,对比分析了内蒙古典型半干旱草原下垫面在晴天、扬沙和沙尘暴天气下各气象要素、地表辐射分量和能量平衡的变化特征。对于半干旱草原区,地面风速越大沙尘天气越强；沙尘过程开始前地面空气较暖,开始后地面空气转为相对较冷的状态；沙尘气溶胶含量越高,5 cm地温日变化趋势越弱,在沙尘过程中5 cm地温值越小。沙尘气溶胶含量越高,太阳总辐射越弱,大气长波辐射越强；地表反射辐射与总辐射有相同的日变化特征；沙尘气溶胶白天使净辐射值减小,夜间使净辐射值增大。沙尘天气直接辐射衰减非常明显,而且散射辐射在总辐射中占很大的比重。沙尘气溶胶对紫外辐射的削弱很强,并且沙尘含量越高,对紫外辐射的削弱越强。沙尘气溶胶的辐射强迫作用对地表能量平衡产生影响,使向上的感热和潜热输送减弱,使向上的土壤热通量增强或向下的土壤热通量减弱。

关键词: 沙尘气溶胶, 半干旱草原, 微气象学, 地表辐射分量, 能量平衡

Abstract: Diurnal variations of micrometeorological factors, surface radiation and energy budget on typical semi-arid grassland in Inner Mongolia under different weather conditions (clear day, blowing-sand day and sandstorm day) were analyzed based on turbulent flux, surface radiation and meteorological data obtained in April and May of 2011 at Xilinhot National Climatological Observatory in Inner Mongolia. The surface temperature decreased a lot under dust weather although it was warm before dust process. The higher wind speed brought about stronger dust process, and the ground temperature at 5 cm below decreased more under higher dust aerosol content. At higher dust aerosol content, the total radiation decreased more significantly but atmospheric long-wave radiation increased more significantly during dust process. The diurnal variation characteristics of ground reflective radiation and total radiation were the same. Net radiation decreased at daytime but increased in nighttime under influence of dust aerosol. The direct radiation and ultraviolet radiation (UV) declined sharply under high aerosol content. On dust day, the ratio of scatter radiation to total radiation was very high. Radiation forcing of dust aerosols also affected surface energy balance by decreasing upward sensible/latent heat transport and downward soil heat flux and increasing upward soil heat flux.

Key words: dust aerosol, semi-arid grassland, micrometeorology, surface radiation balance, energy budget

中图分类号:

P445.4

顾润源, 武荣盛, 周伟灿, 王欣. 内蒙古半干旱草原沙尘天气对近地层微气象学特征影响分析[J]. 中国沙漠, 2012, 32(3): 815-823.

GU Run-yuan, WU Rong-sheng, ZHOU Wei-can, WANG Xin. Impact of Sand-dust Weather on Micrometeorological Characteristics in Semi-arid Grassland of Inner Mongolia[J]. JOURNAL OF DESERT RESEARCH, 2012, 32(3): 815-823.

参考文献

[1]胡隐樵,张强.开展干旱环境动力学研究的若干问题[J].地球科学进展,2001,16（1）:18-23.

[2]王式功,王金艳,周自江,等.中国沙尘天气的区域特征[J].地理学报,2006,58（2）:193-200.

[3]张高英,赵思维,孙建华.近年来强沙尘暴天气气候特征的分析研究[J].气候与环境研究,2004,9（1）:101-115.

[4]叶笃正,丑纪范,刘纪远,等.关于我国华北地区沙尘天气的成因与治理对策[J].地理学报,2000,55(5):513-21.

[5]王存忠,牛生杰,王兰宁.中国近50年来沙尘暴发生特征[J].中国沙漠,2010,30(4):933-939.

[6]张小玲,程丛兰,谢璞,等.连续强沙尘天气的发展和时空演变机制的数值模拟[J].中国沙漠,2007,27(1):137-146.

[7]钱正安,宋敏红,李万元.近50年来中国北方沙尘暴的分布及变化趋势分析[J].中国沙漠,2002,22(2):106-111.

[8]李彰俊,姜学恭,程丛兰.内蒙古中西部沙源地影响沙尘暴扩展过程的数值模拟研究[J].中国沙漠,2007,27(5):851-858.

[9]Tratt D M,Frouin R J,Westphal D L.April 1998 Asian dust event:A southern California perspective[J].Journal of Geophysical Research,2001,106(D16):371-379.

[10]冯鑫媛,王式功,程一凡,等.中国北方中西部沙尘暴气候特征[J].中国沙漠,2010,30(2):394-399.

[11]尹晓惠.我国沙尘天气研究的最新进展与展望[J].中国沙漠,2009,29（4）:728-733.

[12]曾淑玲,程一帆,王式功,等.我国西北和内蒙古地区春季沙尘暴的年代际变化及原因探讨[J].中国沙漠,2010,30（5）:1201-1206.

[13]胡隐樵,光田宁.沙尘暴发展与干飑线-黑风暴形成机理的分析[J].高原气象,1996,15(2):178-185.

[14]符淙斌,延晓东,郭维栋.北方干旱化与人类适应[J].自然科学进展,2006,16（10）:1216-1223.

[15]沈志宝,魏丽.我国西北大气沙尘气溶胶的辐射效应[J].大气科学,2000,24（4）:541-548.

[16]成天涛,吕达仁,徐永福.浑善达克沙地沙尘气溶胶的辐射强迫[J].高原气象,2005,24(6):920-925.

[17]章秋英,牛生杰,沈建国,等.半干旱区气溶胶散射特性研究[J].中国沙漠,2008,28（4）:755-761.

[18]胡泽勇,黄荣辉,卫国安,等.2000年6月4日沙尘暴过境时敦煌地面气象要素及地表能量平衡特征的变化[J].大气科学,2002,26（1）:1-8.

[19]张强,王胜.论特强沙尘暴（黑风）的物理特性及其气候效应[J].中国沙漠,2005,25(5):675-681.

[20]谢亮,张静红.沙尘暴期间的温度脉动特征分析[J].中国沙漠,2011,31(3):649-654.

[21]王明星,张仁健.大气气溶胶研究的前沿问题[J].气候与环境研究,2001,6(1):119-124.

[22]Ramanathan V,Crutzen P J,Kiehl J T,et al.Aerosols,climate,and the hydrological cycle[J].Science,2001,294:2119-2124.

[23]凌肖露,张镭,郭维栋,等.沙尘气溶胶对半干旱区微气象学特征影响的初步研究[J].气候与环境研究,2010,15(3):279-288.

[24]王静,牛生杰,沈建国.锡盟沙尘暴的时空分布及其与气候因子的关系[J].中国沙漠,2009,29（1）:209-216.

[25]岳平,张强,邓振镛,等.草原生长期地表辐射和能量通量月平均日变化特征[J].冰川冻土,2010,32（5）:941-947.

[26]史激光.典型草原区生长季能量平衡闭合分析[J].中国农学通报,2010,26(16):332-226.

[27]地面基准辐射站观测业务规范（试行）[Z].2008.

[28]Mauder M,Lieberthal C,Gockede M,et al.Processing and quality control of flux data during LITFASS-2003[J].Boundary-Layer Meteorology,2006,121:67-88.

[29]王介民.涡动相关通量观测指导手册[M].2008.

[30]Schotanus P,Nieuwstadt F T M,De Bruin H A R.Temperature measurement with a sonic anemometer and its application to heat and moisture fluxes[J].Boundary-Layer Meteorology,1983,26:81-93.

[31]Wilczak J M,Oncley S P,Stage S A.Sonic anemometer tilt correction algorithms[J].Boundary-Layer Meteorology,2001,99:127-150.

[32]Webb E K,Pearman G I,Leuning R.Correction of flux measurements for density effects due to heat and water vapor transfer[J].Quarterly Journal of the Royal Meteorological Society,1980,106:85-100.

[33]沈志宝,魏丽.黑河地区大气沙尘对地面辐射能收支的影响[J].高原气象,1999,18（1）:1-8.

[34]季国良,江灏,吕兰芝.青藏高原的长波辐射特征[J].高原气象,1995,14(4):451-457.

[35]武荣盛,马耀明.青藏高原不同地区辐射特征对比分析[J].高原气象,2010,29（2）:251-259.

[36]胡波,王跃思,何新星,等.北京2004年一次强沙尘暴过程的辐射特征研究[J].气候与环境研究,2005,10（2）:265-274.

[37]何清,金莉莉,艾力·买买提明,等.塔克拉玛干沙漠腹地太阳紫外UV-B辐射的观测与分析[J].中国沙漠,2010,30（3）:640-647.