天山乌鲁木齐河源1号冰川气溶胶可溶性离子昼夜变化研究  

Day-Night Variations of the Soluble Ions in Aerosol on the Glacier No.1 in the Headwaters of the ürmqi River,Tianshan Mountains,China

作　　者：周平[1] 张明军[1,2] 李忠勤[2,1] 赵淑惠[2] 金爽[1] 

机构地区：[1]西北师范大学地理与环境科学学院,甘肃兰州730070 [2]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室/天山冰川站,甘肃兰州730000

出　　处：《冰川冻土》2009年第3期474-482,共9页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(407010354063100140571033);霍英东教育基金项目(101019);陇原青年创新人才扶持计划项目;西北师范大学知识与科技创新工程科研骨干培育项目(NWNU-KJCXGC-03-45);西北师范大学自然地理学省级重点学科资助

摘　　要：在2007年4月16—23日,8月5—12日,10月20—23日3个采样时段内,分昼夜采集了16个气溶胶样品,对样品中的可溶性离子(Na+、K+、Mg2+、Ca2+、Cl-、NO3-、SO42-)进行了分析,以研究气溶胶可溶性离子的昼夜变化特征和可能的影响因素.结果表明:天山乌鲁木齐河源1号冰川气溶胶夜间平均离子浓度高于白天浓度,7种离子中,除NO3-在全年中的平均离子浓度表现为白天高于晚上外,其余离子的平均浓度均是夜间高于白天.区域风向的日变化是控制气溶胶浓度昼夜变化的主要影响因素,相比之下大气环流的影响则相对较弱.在所研究的8组昼夜变化事件中,Ca2+的昼夜变化最为明显,离子浓度的高值事件多出现在晚上,而其余离子在采样时段内的昼夜变化事件表现则不尽一致,无明显规律.Day and night samples of aerosol （n = 16） had been collected on the Glacier No. 1 in the headwaters of the Urumqi River, Tianshan Mountains, during April 16 to 23, August 5 to 12 and October 20 to 23, 2007. All samples （including the species of Na^＋, K^＋, Mg^2＋, Ca^2＋, CI^-, NO3^- and SO4^2-） were analyzed and studied in terms of day-night variations. Results show that the nighttime samples generally have higher concentration than the daytime samples on the glacier.The nighttime samples have higher concentration than the daytime samples for Na^＋, K^＋, Mg^2＋, Ca^2＋, Cl^- and SO4^2-, except for NO3^-, which has higher concentration during daytime. The temporal variations of the concentrations during the sampiing periods were dominated by wind. In the eight day-night variation events, Ca^2＋ has obviously daynight variation, while the others varied with no regularity during the three sampling periods.

关 键 词：乌鲁木齐河源1号冰川 气溶胶 可溶性离子 昼夜变化 

分 类 号：P343.6[天文地球—水文科学]