摘要
土地沙漠化问题作为生态环境脆弱性表现之一,以锡林郭勒盟沙漠化动态变化为研究对象,采用2000年、2010年、2015年3期Landsat-8 OLI影像,利用SPEI(标准化降水蒸散指数)、转移矩阵及动态度结合气象数据分析研究锡林郭勒盟地区沙漠化动态变化及其驱动力因素。结果表明:2000—2015年沙漠化动态度为-0.15,SPEI值为0.28,说明沙漠化程度总体呈现逆转趋势;2010—2015年动态度为0.01,且期间存在发展趋势。进一步研究表明,2000—2015年,降水量、气温、人口、大牲畜数量呈上升趋势,起沙风速≥4.5 m/s天数呈现减少趋势,造成沙漠化逆转与发展的驱动因素包括区域气候变化的响应与人类活动的干预,以期为沙漠化治理提供理论依据与支持。
As one of the manifestations of ecological environmental vulnerability,the desertification issue takes Xilin Gol League desertification dynamic change as the research object,and adopts Landsat-8 OLI images of the third phase in 2000,2010 and 2015,using SPEI（ standardized precipitation evapotranspiration index） and transfer matrix. The analysis of the dynamics of desertification and its driving factors in the Xilinguole League area were carried out in conjunction with the meteorological data and dynamics. The results showed that the desertification dynamics from 2000 to 2015 was-0. 15,and the SPEI was 0. 28,indicating that the overall degree of desertification showed a reversal trend; the dynamic degree from 2010 to 2015 was 0. 01,and there was a trend during the period. Further research shows that from 2000 to 2015,precipitation,air temperature,population,and large livestock numbers are on the rise,and the number of days with wind speeds of ≥4. 5 m/s is showing a decreasing trend. The drivers of desertification reversal and development include the response to regional climate change. Intervention with human activities in order to provide a theoretical basis and support for desertification governance.
作者
王艳琦
银山
郭恩亮
彭秀清
郭连发
李雨薇
WANG Yanqi;YIN Shan;GUO Enliang;PENG Xiuqing;GUO Lianfa;LI Yuwei(College of Geographical Sciences,Inner Mongol Normal University,Hohhot 010022,China;Inner Mongolian Key Laboratory of Remote Settling ＆Geography Information System,Inner Mongol Normal University,Hohhot 010022,China)
出处
《内蒙古农业大学学报（自然科学版）》
CAS
北大核心
2018年第5期58-63,共6页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
国家自然科学基金(61631011,61550005)
内蒙古自治区科技厅项目(2018-ZME-KJXT-14,2017FY101301-4)
内蒙古师范大学研究生科研创新基金资助项目--内蒙古自治区研究生教育创新计划资助项目(S20171013508)资助
