地球信息科学学报 ›› 2015, Vol. 17 ›› Issue (1): 78-85.doi: 10.3724/SP.J.1047.2015.00078
王昭生1,2,3(), 黄玫1,*(
), 闫慧敏1, 王军邦1, 岳溪柳1
收稿日期:
2014-01-17
修回日期:
2014-03-23
出版日期:
2015-01-10
发布日期:
2015-01-05
作者简介:
作者简介:王昭生(1985-),男,甘肃武威人,博士生,研究方向为陆地生态系统对气候变化响应的模拟与分析。E-mail:
基金资助:
WANG Zhaosheng1,2,3(), HUANG Mei1,*(
), YAN Huimin1, WANG Junbang1, YUE Xiliu1
Received:
2014-01-17
Revised:
2014-03-23
Online:
2015-01-10
Published:
2015-01-05
About author:
*The author: CHEN Nan, E-mail:
摘要:
非洲陆地生态系统是气候变化的高敏感区,研究该区域植被覆盖变化及其控制因素,对深刻认识气候变化的影响具有重要意义。本文利用1982-2006年植被指数(NDVI)数据,研究位于非洲西部热带地区的加纳共和国植被覆盖的时空变化特征,结合同期的气温和降水量数据,分析其植被活动对气候变化的响应特征。研究结果表明,加纳86.4%的植被覆盖区NDVI在25 a间都呈现不同程度的增加趋势。20世纪80年代初和21世纪初这2个时期,NDVI值大于0.4的面积百分比呈增加趋势;NDVI值大于0.5的面积百分比从26%增加到38.2%;NDVI值在0.4-0.5之间的面积百分比从47.5%增加到51.9%。NDVI受降水量控制的区域占总区域面积的57.2%,而受气温控制的面积占总区域面积的42.8%。总的来看,加纳植被覆盖对降水量变化的敏感程度强于气温变化。
王昭生, 黄玫, 闫慧敏, 王军邦, 岳溪柳. 1982-2006年加纳植被覆盖时空变化及其气候影响[J]. 地球信息科学学报, 2015, 17(1): 78-85.DOI:10.3724/SP.J.1047.2015.00078
WANG Zhaosheng,HUANG Mei,YAN Huimin,WANG Junbang,YUE Xiliu. Spatiotemporal Variation of Vegetation and Climate Impacts on It in Ghana from 1982 to 2006[J]. Journal of Geo-information Science, 2015, 17(1): 78-85.DOI:10.3724/SP.J.1047.2015.00078
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