摘要
目的对1998—2005年黄土高原植被覆盖变化进行分析。方法以SPOT VEGETATIONS10 NDVI为数据源,以月NDVI最大值、NDVI年均值和NDVI变化率为指标,采用时间序列分析方法,阐明黄土高原植被覆盖的时空变化特征。结果 8年间,黄土高原的植被覆盖间或有降低,但植被活动总体呈现增强趋势。结论植被覆盖变化趋势和气候紧密联系,中西部地区植被增加和减少的区域相互交错,这一特性是由农业生产活动、城市建设、政府决策以及植被对气候变化的响应等综合因素作用的结果。
Aim Analysis on the dynamic vegetation cover change in Loess Plateau from 1998 to 2005. Methods Dynamic changes in Loess Plateau vegetation over 8 years and their spatial patterns were explored, using maximum NDVI per month, mean NDVI per year and NDVI deviation derived from SPOT VEGETATION S10 NDVI as indexes and adopting time-series analysis approach. Results Although significant declines appeared from 1998 to 2001 and from 2004 to 2005, an increasing trend occurred over the past eight years. Conclusion The dynamic vegetation cover is closely coupled with climatic fluctuation, vegetation increased areas and decreased areas are intervened mutually in middle of Loess Plateau, which is caused by agricultural activities, city construction, government policies and the response of vegetation to climate changes
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第6期1054-1058,共5页
Journal of Northwest University（Natural Science Edition）
基金
国家自然科学基金资助项目(41171225)
