气候驱动格局下中国陆地植被指数变化

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	气候驱动格局下中国陆地植被指数变化
	武永峰; 王秀芬; 李茂松; 宋吉青
刊名	干旱区地理
	2009
卷号	32 期号:2 页码:166-174
关键词	气候因子驱动格局植被指数时空变化
ISSN号	1000-6060
其他题名	NDVI changes under the spatial patterns driven by climate factors in China
英文摘要	将降水、气温和日照作为驱动中国陆地植被指数变化的典型气候因子,基于1982-1999年10天合成的NOAA/AVHRR NDVI与同期降水量、平均气温和日照时数数据,按所有年份求平均后,分析旬NDVI与旬降水量、旬平均气温和旬日照时数的年内相关关系,确定中国陆地植被指数变化的气候驱动格局,揭示不同气候因子驱动格局下植被指数的时空变化特征和规律.结果表明,绝大部分植被覆盖区NDVI受气候因子驱动作用明显.气候因子驱动陆地植被指数变化的空间分异格局较为明显,大致分为气温显著区,降水显著区,日照显著区,气温和降水显著区,气温和日照显著区,降水和日照显著区,气温、降水和日照显著区,气温、降水和日照弱显著区,气温、降水和日照不显著区等9大类型.受局部地形、大气环流、海拔高度等的影响,在大的基本气候驱动格局内,还会形成其他不同的小气候驱动格局.1982-1999年间,所有气候驱动区的植被活动均表现为增强趋势,其NDVI的增加主要发生在春季或夏季.其中,气温和日照显著区的春季NDVI增幅最大,降水和日照显著区的夏季NDVI增幅最大.从各月变化来看,气温显著区、气温和降水显著区5月份的NDVI增长最为迅速,降水显著区、降水和日照显著区6月份的NDVI增长最迅速,日照显著区、气温和日照显著区3月份的NDVI增长最迅速,气温、降水和日照弱显著区4月份的NDVI增长最迅速,这些月份对全年NDVI变化的贡献也最大.; Air temperature, precipitation and sunlight are f'trstly considered as the principal climate factors driving NDVI changes in China. Based on the ten-day composite NOAA/AVHRR NDVI and corresponding meteorological data of 1982 -1999, averaging the ten-day NDVI, ten-day average air temperature, ten-day precipitation and ten-day sunlight of all years, and respectively analyzing the correlations of ten-day NDVI and average air temperature, precipitation, sunlight in a year to determine the NDVI changes under the spatial patterns driven by climate factors in China. Finally, the spatio-temporal NDVI changes features and trends under the patterns driven by climate fac-tors are analyzed through using statistics methods. The results indicate that the NDVI changes of the most vegetation coverage regions are obviously driven by the various climate factors. The spatial patterns of NDVI changes driven by climate factors mainly include 9 basic types, namely, the regions driven evidently by air temperature factor, the re-gions driven evidently by precipitation factor, the regions driven evidently by sunlight factor, the regions driven evi-dently by air temperature and precipitation factors, the regions driven evidently by air temperature and sunlight fac-tors, the regions driven evidently by precipitation and sunlight factors, the regions driven evidently by air tempera-ture, precipitation and sunlight factors, the regions driven moderately by air temperature, precipitation and sunlight factors and the regions driven by no air temperature, precipitation and sunlight factors. In addition, owing to the influences of local terrains, atmospheric circumfluence and elevations, some small spatial patterns driven by other local climate factors form also within the basic driven spatial patterns. In 1982 - 1999, the vegetation activities of all driven spatial patterns have an increasing trend and the increases of NDVI mainly happen in spring or summer.Thereinto, the spring NDVI of the regions driven evidently by air temperature and sunlight factors has the most in-crease amplitude. In the regions driven evidently by precipitation and sunlight factors, the increase amplitude of the summer NDVI is the most. From every month NDVI changes, the NDVI of March, May, June, and April increase furthest and have the most contributions to all-year NDVI increases. In the regions driven evidently by air tempera-ture factor and the regions driven moderately by air temperature, precipitation and sunlight factors, NDVI of every month increases, however, NDVI of the months except for November and December have an increase trend in the other driven regions.
学科主题	植物学
语种	中文
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/17321]
专题	农业环境与可持续发展研究所_农业减灾研究室
作者单位	中国农业科学院农业环境与可持续发展研究所, 北京, 100081
推荐引用方式 GB/T 7714	武永峰,王秀芬,李茂松,等. 气候驱动格局下中国陆地植被指数变化[J]. 干旱区地理,2009,32(2):166-174.
APA	武永峰,王秀芬,李茂松,&宋吉青.(2009).气候驱动格局下中国陆地植被指数变化.干旱区地理,32(2),166-174.
MLA	武永峰,et al."气候驱动格局下中国陆地植被指数变化".干旱区地理 32.2(2009):166-174.