SCIENTIA GEOGRAPHICA SINICA ›› 2014, Vol. 34 ›› Issue (7): 882-888.doi: 10.13249/j.cnki.sgs.2014.07.882

• Orginal Article • Previous Articles     Next Articles

Spatio-temporal Change of Vegetation NDVI and Its Relations with Regional Climate in Northern Shaanxi Province in 2000-2010

Jian-jun BAI(), Jiang-tao BAI, Lei WANG   

  1. College of Tourism and Environment, Shaanxi Normal University, Xi’an, Shaanxi 710062, China
  • Received:2013-04-25 Revised:2013-06-29 Online:2014-07-10 Published:2013-11-18

Abstract:

Correlation analysis, spatial statistical analysis and overlay analysis are carried out to investigate spatial distribution pattern and variation characteristics of vegetation NDVI, and to analyze the relations between vegetation NDVI and regional climate from the views of temperature and precipitation respectively. The results indicate that the vegetation NDVI change shows three periods during 2000-2010: relatively-rapid growth stage in 2000-2002, slightly fluctuate stage in 2003-2005, and steady growth stage in 2006-2010. Vegetation NDVI change varies in different regions. In the loess hilly area of the central and eastern region of northern Shaanxi Province, the vegetation cover increased significantly, while in the wind drift sand area of the northern region, the vegetation cover change was small, and in low-mountain hilly area of the southern region, the vegetation cover slightly decreased. The precipitation was going on a declining curve in 2000-2010, while the temperature undergoing an upward trend in the same period. However, this dry-heating climate trend has been slightly restrained over the past years. The vegetation cover is positively related to precipitation and temperature in some areas,while in other areas it is negative. The linear relation is not obvious. Climate mainly impacts growth rhythm of vegetation in growth period, while temperature is a very important factor to inhibit vegetation growth in summer, and precipitation’s impact on vegetation growth is obviously hysteretic.

Key words: NDVI, northern Shaanxi Province, spatio-temporal change, regional climate

CLC Number: 

  • TP79