Article

[Relationships between horqin meadow NDVI and meteorological factors].

Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
Ying yong sheng tai xue bao = The journal of applied ecology / Zhongguo sheng tai xue xue hui, Zhongguo ke xue yuan Shenyang ying yong sheng tai yan jiu suo zhu ban 02/2009; 20(1):58-64. pp.58-64
Source: PubMed

ABSTRACT 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.

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Keywords

air temperature
 
cumulated dual effect
 
cumulated precipitation
 
Cumulated temperature
 
day-by-day meteorological data
 
growth season
 
inter-annual turning-green period
 
inter-annual variations
 
July
 
obvious effects
 
relationships
 
relevant meteorological factors
 
seasonal
 
seasonal variation
 
water vapor pressure
 
whole year