[Relationships between horqin meadow NDVI and meteorological factors].
Based on the 2000-2006 MODIS 8-day composite NDVI and day-by-day meteorological data, the seasonal and inter-annual variations of Horqin meadow NDVI as well as the relationships between the NDVI and relevant meteorological factors were studied. The results showed that as for the seasonal variation, Horqin meadow NDVI was more related to water vapor pressure than to precipitation. Cumulated temperature and cumulated precipitation together affected the inter-annual turning-green period significantly, and the precipitation in growth season (June and July), compared with that in whole year, had more obvious effects on the annual maximal NDVI. The analysis of time lag effect indicated that water vapor pressure had a persistent (about 12 days) prominent effect on the NDVI. The time lag effect of mean air temperature was 11-15 days, and the cumulated dual effect of the temperature and precipitation was 36-52 days.
Qu
Cui-ping
CP
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. cuipinggirl@163.com
Guan
De-xin
DX
Wang
An-zhi
AZ
Jin
Chang-jie
CJ
Wu
Jia-bing
JB
Wang
Ji-jun
JJ
Ni
Pan
P
Yuan
Feng-hui
FH
D002681:China; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods*; D008685:Meteorological Concepts; D006109:Poaceae / Q000254:growth & development* / Q000502:physiology; D017215:Satellite Communications; D012621:Seasons