北京师范大学学报（自然科学版）2017，Vol.53Issue(2)：222-228,7.DOI:10.16360/j.cnki.jbnuns.2017.02.018
干旱对华北地区植被变化的影响
Drought impacts on vegetation changes in North China
摘要
Abstract
The 13-year (2001-2013) time series of Moderate-resolution Imaging Spectroradiometer (MODIS) Normalized Difference Vegetation Index (NDVI) products and the Palmer Drought Severity Index (PDSI) calculated from meteorological station data were used to analyze spatial-temporal variations in NDVI,evolution characteristics of PDSI in North China and in three kinds of major land type areas.The multi-scale correlation between NDVI and PDSI was also calculated to explore drought impacts on vegetation changes.It was found that NDVI varied in different areas,with higher NDVI in southeast and center compared to northwest.From 2001-2013,vegetation activities in North China showed an increasing trend,and the increasing trend was most significant in the autumn.The annual average PDSI showed an increasing trend,especially in the autumn.There was a significant positive correlation between annual variation of vegetation and drought,and droughts had a strong influence on vegetation growth.Seasonally,a positive correlation between variation of vegetation and drought was the most significant in the summer.Vegetation growth was the most susceptible to drought in summer.Analysis of 16-day data showed that NDVI anomaly was more suitable than NDVI to characterize relationship between vegetation growth and drought in North China.关键词
NDVI/PDSI/干旱/相关性/华北地区Key words
NDVI/PDSI/drought/correlation/North China分类
天文与地球科学引用本文复制引用
刘大川,周磊,武建军..干旱对华北地区植被变化的影响[J].北京师范大学学报（自然科学版）,2017,53(2):222-228,7.基金项目
北京师范大学环境演变与自然灾害教育部重点实验室开放基金资助项目 （）
国家国际科技合作专项资助项目(2013DFG21010) （2013DFG21010）
国家自然科学基金资助项目(41501556) （41501556）
中央高校基本科研业务费专项资金资助项目 （）
