首页 | 本学科首页   官方微博 | 高级检索  
     

宁夏中部干旱带生态变化与沙尘暴发生的关系分析
引用本文:赵光平, 陈楠, 杨建玲, 等. 宁夏中部干旱带生态变化与沙尘暴发生的关系分析. 应用气象学报, 2004, 15(4): 477-484.
作者姓名:赵光平 陈楠 杨建玲 李艳春 吴加敏
作者单位:1.宁夏气象防灾减灾重点实验室, 银川 750002;2.中国气象局兰州干旱气象研究所, 兰州 730020;3.宁夏地矿厅遥感中心, 银川 750021
基金项目:国家自然科学基金项目 ( 4 0 0 65 0 0 2 )资助
摘    要:利用TM遥感资料, 结合8大类土地详查资料, 基本查清了位于宁夏中部干旱带具有代表性的沙尘暴高发区盐池县20世纪90年代年际变迁量化特征。分析表明, 盐池县90年代初期的生态状况明显好于末期。气候干旱是导致生态变化的主要原因, 但人为活动如大量开垦耕地、过牧及滥挖甘草等也是重要因子。依据沙尘暴的成因, 通过对近30年盐池县沙尘暴个例多源资料综合分析, 局部治理整体恶化的生态现状导致了沙尘暴起暴阈值的明显下降, 即近30年来沙尘暴在宁夏中部的干旱地带发生机率已显著提高。由于造成我国西北地区土地荒漠化的气候、水资源短缺、土地资源超载等因素在可预见的一个相当长的时期将难以得到较大的改善, 且干旱区的生态环境具有脆弱性、易损性、难复性等特点, 该文通过较全面客观的量化分析, 初次提出今后我国西北地区的沙尘暴发生机率应处在上升的态势之中。

关 键 词:荒漠化   沙尘暴   演变趋势
收稿时间:2003-01-20
修稿时间:2003-09-01

An Analysis on the Relationship Between the Ecological Change and Sandstorm in the Drought Zone of Middle Ningxia
Zhao Guangping, Chen Nan, Yang Jianling, et al. An analysis on the relationship between the ecological change and sandstorm in the drought zone of middle Ningxia. J Appl Meteor Sci, 2004, 15(4): 477-484.
Authors:Zhao Guangping Chen Nan Yang Jianling Li Yanchun Wu Jiamin
Affiliation:1. The Ningxia Laboratory for Meteorological Disaster Prevention and Reduction , Yinchuan 750002;2. Remote Sensing Center , Geology-mine Of fice of Ningxia , Yinchuan 750021
Abstract:The year to year quantificational change characteristics in Yanchi county of the drought zone of the middle Ningxia where occurred sandstorm frequently in the 1990s were revealed on the whole by using TM remote sensing and land survey data. Analyzed results show that ecological condition in Yanchi county in the early 1990s was obviously better than that in the late 1990s. Drought was mainly reasons caused ecological change. Human activity, such as land over cultivated on a large scale, over pasturage and digging the liquorice in excess, however, was another important reason. It was the situation of ecological environment became worse and worse in whole and got better in part that caused the fall in threshold of dust blowing. The probability of sandstorm occurrence had been increased remarkably in the drought zone of middle Ningxia in the past 30 years according to the analysis of the cause of sandstorm and by mean of synthetically analysis of individual cases of thirty year sandstorms in Yanchi county. Due to those factors: climate,water resource shortage and land overloaded etc which caused desertification in western china would not be improved in predictable long term period in future, moreover , ecological environment is frangible, easy to ruin and difficult to resume , and with the objective quantificational analysis on data, we put forward a point in the first time of that the probability sandstorm occurrence in western china would be in the ascending situation from now on.
Keywords:Desertification Sandstorm Coupling relationship
本文献已被 CNKI 维普 万方数据 等数据库收录!
点击此处可从《应用气象学报》浏览原始摘要信息
点击此处可从《应用气象学报》下载免费的PDF全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号