塔克拉玛干沙漠东南缘沙尘暴过程中近地表沙尘水平通量观测研究

doi:10.7522/j.issn.1000-694X.2013.00192

摘要/Abstract

摘要：

沙漠是重要的沙尘源区,沙漠地区近地表水平输送的沙尘物质通量及其随高度的变化是沙尘输送过程的重要特征。在塔克拉玛干沙漠东南缘若羌平坦沙地的风沙观测场,利用BSNE集沙仪对沙尘暴天气过程中近地表2 m内不同高度沙尘物质的水平输送进行了观测,对其随高度变化特征进行了分析,并对近地表水平运动的沙尘通量进行了计算。结果表明:观测点沙尘物质的水平通量随高度的增加而减小,与高度的关系可用幂函数表示;约66%的沙尘在地表50 cm高度以内传输;80%的沙尘在地表100 cm高度以内传输;观测点2009—2010年12次沙尘暴天气过程,通过0～2 m高度的单宽总输沙量为3 627.9 kg·m-1,PM80、PM50的输送量分别为1 430.4 kg·m-1、216.2 kg·m-1。

关键词: 沙尘输送, 沙尘水平通量, 沙尘暴, 塔克拉玛干沙漠

Abstract:

Aeolian sand-dust transport is a serious problem in many arid regions in the world, and it is considered to be the significant part of global biogeochemical cycles. While deserts are the main source of aeolian sand-dust transport in the near-surface layer, and aeolian sand-dust transport processes are closely related to the variation of near-surface horizontal sand-dust flux with height. This paper discusses the variation of horizontal sand-dust flux within 0-2 m with height over the ground surface based on one-year observation on sandy land in the southeastern Taklimakan Desert by BSNE samplers. It is revealed that horizontal sand-dust flux amount decays with height, which can be described by power function. There is about 66% of the horizontal sand-dust flux transported within 0-50 cm over the ground surface, and 80% is transported within 0-100 cm over the ground surface. In the studied area, the horizontal sand-dust flux passing height from 0 to 200 cm is 3 627.9 kg·m-1, among them, the amounts of PM80 and PM50 are 1 430.4 kg·m-1 and 216.2 kg·m-1, respectively.

Key words: sand-dust transport, horizontal sand-dust flux, sandstorms, Taklimakan Desert

中图分类号:

X169

杨兴华1,2, 何清1,2, 艾力·买买提依明1,2, 霍文1,2, 刘新春1,2. 塔克拉玛干沙漠东南缘沙尘暴过程中近地表沙尘水平通量观测研究[J]. 中国沙漠, 2013, 33(5): 1299-1304.

YANG Xing-hua1,2, HE Qing1,2, Ali Mamtimin1,2, HUO Wen1,2, LIU Xin-chun1,2. Observational Study on Near-surface Horizontal Sand-dust Flux of Sandstorms in the Southeastern Fringe of the Taklimakan Desert[J]. JOURNAL OF DESERT RESEARCH, 2013, 33(5): 1299-1304.

参考文献

[1]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[J].中国沙漠,2002,22(2):106-111.

[2]Zhao T L,Gong S L,Zang X Y,et al.A simulated climatology of Asian dust aerosol and its transpacific transport.Part Ⅰ:mean climate and validation[J].Journal of Climate,2006,19:88-103.

[3]Chepil W S.Dynamics of wind erosion:V.cumulative intensity of soil drifting across eroding fields[J].Soil Science,1946,61:257-263.

[4]Fryrear D W.Soil losses by wind erosion[J].Soil Science Society of America Journal,1991,59:668-672.

[5]Stout J E,Zobeck T M.The wolfforth field experiment:a wind erosion study[J].Soil Science,1996,161(9):616-632.

[6]Sterk G.Wind Erosion in the Sahelian Zone of Niger:Processes,Models,and Control Techniques[D].Wageningen:Wageningen Agricultural University,1997.

[7]Van Donk S J,Huang X,Skidmoren E L,et al.Wind erosion from military training lands in the Mojave Desert,California,USA[J].Journal of Arid Environments,2003,54:687-703.

[8]Bagnol R A.The Physics of Blown Sand and Desert Dunes[M].London:Methuen,1941:265.

[9]Chepil W S.Dynamics of wind erosion:nature of movement of soil by wind[J].Soil Science,1945,60:305-320.

[10]Williams G.Some aspects of the eolian saltation load[J].Sedimentology,1964,3:257-287.

[11]Fryrear D W,Saleh A.Field wind erosion:vertical distribution[J].Soil Science,1993,155:294-300.

[12]Greeley R,Blumberg D G,Williams S H.Field measurements of the flux and speed of wind-blown sand[J].Sedimentology,1996,43:41-52.

[13]Nalpanis P,Hunt J C R,Barrett C F.Saltating particles over flat beds[J].Journal of Fluid Mechanics,1993,251:661-685.

[14]Butterfield G R.Near-bed mass flux profiles in aeolian sand transport,high-resolution measurements in a wind tunnel[J].Earth Surface Processes and Landforms,1999,24:393-412.

[15]Nickling W G.Eolian sediment transport during duststorms:Slims River Valley,Yukon Territory[J].Canadian Journal Earth Science,1978,15,1069-1084.

[16]Shao Y P and Leslie L M.Wind erosion prediction over the Australian continent[J].Journal of Geophysical Research,1997,102:30091-30105.

[17]Anderson R S,Hallet B.Sediment transport by wind:toward a general model[J].Geological Society of America Bulletin,1986,97:523-535.

[18]Dong Z B,Qian G Q,Luo W Y,et al.Analysis of the mass flux profiles of an Aeolian saltating cloud[J].Journal of Geophysical Research,2006,111:D16111.

[19]赵明,詹科杰,杨自辉,等.民勤沙漠-绿洲低空沙尘暴结构特征研究[J].中国科学:地球科学,2011,41(2):234-242.

[20]Dong Z B,Man D Q,Luo W Y,et al.Horizontal aeolian sediment flux in the Minqin area,a major source of Chinese dust storms[J].Geomorphology,2010,116:58-66.

[21]Zhang Z C,Dong Z B,Zhao A G.The characteristics of aeolian sediment flux profiles in the south-eastern Tengger Desert[J].Sedimentology,2011,58:1884-1894.

[22]Yang X H,He Q,Ali Mamtimin,et al.A field experiment on dust emission by wind erosion in the Taklimakan Desert[J].ACTA Meteorologica Sinica,2012,26(2):241-249.

[23]杨兴华,李红军,何清,等.塔克拉玛干沙漠荒漠过渡带春季风沙活动特征——以肖塘为例[J].中国沙漠,2012,32(4):915-920.

[24]杨兴华,何清,霍文,等.塔克拉玛干沙漠南缘风沙跃移运动研究——以策勒为例[J].中国沙漠,2012,32(4):910-914.

[25]詹科杰,赵明,杨自辉,等.地-气温差对沙尘源区不同下垫面沙尘输运结构的影响[J].中国沙漠,2011,33(3):655-660.

[26]Fryrear D W.A field dust sampler[J].Journal of Soil and Water Conservation.1986,41:117-120.

[27]Shao Y,McTainsh G H,Leys J F.Efficiency of sediment samplers for wind erosion measurement[J].Australian Journal of Soil Research,1993,31(4):519-531.

[28]Shao Y.A similarity theory for saltation and application to aeolian mass flux[J].Boundary-Layer Meteorology,2005,115:319-338.

[29]Gillette D A.Environmental factors affecting dust emission by wind[M]//Morales C.Sahara Dust.New York:John Wiley & Sons,1979:71-91.

[30]Jackson M L,Levett T W M,Syers J K,et al.Geomorphological relationships of tropospherically derived quartz in the soils of the Hawaiian Islands[J].Proceedings of the Soil Science Society of America,1971,35:515-525.

[31]Chen W,Yang Z,Zhang J,et al.Vertical distribution of wind-blown sand flux in the surface layer,Taklamakan Desert,central Asia[J].Physical Geography,1996,17:193-218.

[32]杨东亮,王雪芹,胡永峰,等.风沙流输沙通量垂向分布研究——以塔克拉玛干沙漠南缘流沙地表风沙流观测为例[J].中国沙漠,2012,32(3):631-639.

[33]何清,杨兴华,艾力·买买提依明,等.塔克拉玛干沙漠风蚀起沙观测研究[J].中国沙漠,2011,31(2):315-322.

[34]冯大军,倪晋仁,李振山.风沙流中不同粒径组沙粒的输沙量垂向分布实验研究[J].地理学报,2007,62(11):1194-1203.