A Field Experiment on Dust Emission by Wind Erosion in the Taklimakan Desert

作     者：杨兴华 何清 艾力.买买提依明 霍文 刘新春 STRAKE Miriam 

作者机构：Institute of Desert MeteorologyChina Meteorological Administration Desert Atmosphere and Environment Observation Experiment of Taklimakan Station Ruprecht KarlsUniversity of Heidelberg 

出 版 物：《Acta meteorologica Sinica》 (Acta Meteorologica Sinica)

年 卷 期：2012年第26卷第2期

页      面：241-249页

核心收录：

学科分类：07[理学] 0707[理学-海洋科学] 070601[理学-气象学] 0815[工学-水利工程] 0706[理学-大气科学] 0816[工学-测绘科学与技术] 0824[工学-船舶与海洋工程] 0825[工学-航空宇航科学与技术] 

基　　金：Supported by the National Natural Science Foundation of China (41175017 and 41175140) China Meteorological Administration Special Public Welfare Research Fund (GYHY201006012) 

主　　题：wind erosion saltation activity threshold wind velocity sediment discharge Taklimakan Desert 

摘      要：Dust emission by wind erosion in surface is a serious problem in many arid regions around the world,and it is harmful to the ecological environment,human health,and social *** monitor the characteristics of saltation activity and to calculate the threshold wind velocity and sediment discharge under field conditions have significance on the research of dust emission by wind ***,a field experiment was conducted over the flat sand in the hinterland of the Taklimakan *** sampling system was installed on the flat sand surface at Tazhong,consisting of a meteorological tower with a height of 2 m,a piezoelectric saltation sensor（Sensit）,and a Big Spring Number Eight（BSNE） sampler *** of saltation activity was recorded every second using the *** BSNE station consisted of five BSNE samplers with the lowest sampler at 0.05 m and the highest sampler at 1.0 m above the soil *** was collected from the samplers every 24 *** is found that saltation activity was detected for only 21.5% of the hours measured,and the longest period of saltation activity occurring continuously was not longer than 5 min under the field *** threshold wind velocity was variable,its minimum value was 4.9 m s 1,the maximum value was 9.2 m s 1,and the average value was 7.0 m s *** threshold wind velocity presented a positive linear increase during the measurement *** observation site had a sediment discharge of 82.1 kg m 1 over a period of 24 *** on hourly saltation counts,hourly sediment discharge was ***,there was no obvious linear or other functional relationship between the hourly sediment discharge and wind *** results show that the changes of sediment discharge do not quite depend on wind velocity.