老哈河下游地区起沙风特征  

Characteristics of Sand-Driving Wind in the Lower Reaches of the Laoha River in China

作　　者：杨林[1] 韩广[1] 李广[1,2] 朱婷[3] 谭慧婷[1] 谭陈恬 

机构地区：[1]湖南师范大学资源与环境科学学院,中国长沙410081 [2]南京大学地理与海洋科学学院,中国南京210023 [3]云南师范大学旅游与地理科学学院,中国昆明650500

出　　处：《湖南师范大学自然科学学报》2015年第3期1-5,共5页Journal of Natural Science of Hunan Normal University

基　　金：国家自然科学基金资助项目(41271025);湖南省重点学科(地理学)建设项目(2012001)

摘　　要：应用中国科学院奈曼沙漠化研究站2006-2013年的气象资料,统计分析了老哈河下游地区近8年来的起沙风特征.结果表明：（1）起沙风的月平均风速为5.81-6.75 m·s-1,最大风速变化范围为17.40-25.60 m·s-1.春季（3-5月）是老哈河下游地区的主要风沙活动期.（2）起沙风风向以WNW和NW及W为主,分别占年起沙风频率的16.02%,12.66%和11.18%.不同月份、季节起沙风向变化及各方向所占频率也有较大差异.在风沙活动期内,起沙风风向以WNW和NW为主,分别占该时段起沙风频率的14.35%和13.44%;其次为SW和SSE及W风向,分别占该时段起沙风频率的8.51%、8.35%和8.11%;起沙风风向变化频繁,但西北风占主导地位,西南风次之.A statistical analysis on the characteristic of sand-driving wind in the lower reaches of the Laoha River in past eight years was made by the meteorological data from 2006 to 2013 on the Naiman desert station of Chinese Scientific Research Institute. The results showed that the monthly mean speed of sand-driving wind ranges in 5.81 x 6.75 m · s - i, the maximum wind speed varies in 17.40 x 25.60 m · s - i The main phase of sand-drift activity in lower reaches of Laoha river was spring （from March to May）. The direction of sand-driving wind was mainly WNW, NW, W, with the yearly frequency of sand-driving wind 16.02%, 12.66% and 11.18%, respec- tively. There are great difference on the direction change of sand-driving wind and corresponding frequency in differentmonths and seasons. During the phase of sand-drift activity, the direction of sand-driving wind were mainly WNW, NW, accounting for 14.35% 8.11% ;the direction of sand-driving by southwest wind. and 13.44% ; followed by SW, SSE, W, accounting for 8.51% , 8.35% and wind changed frequently, northwest wind held a leading place, followedby southwest wind.

关 键 词：起沙风 风沙活动期 老哈河 

分 类 号：P931[天文地球—自然地理学]