대한원격탐사학회:학술대회논문집 (Proceedings of the KSRS Conference)
- 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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- Pages.147-149
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- 2003
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- 1226-9743(pISSN)
Wetness or Warmth, Which is the Dominant Factor for Vegetation?
- Suzuki, Rikie (Frontier Research System for Global Change) ;
- Xu, Jianqing (Frontier Research System for Global Change) ;
- Motoya, Ken (Frontier Research System for Global Change)
- 발행 : 2003.11.03
초록
The wetness, a function of precipitation and temperature etc, and the warmth, a function of temperature, are the dominant factor for global vegetation distribution. This paper employs the normalized difference vegetation index (NDVI), warmth index (WAI), and wetness index (WEI), and focuses on an essential climate-vegetation relationship at global scale. The NDVI was acquired from ‘Twenty-year global 4-minute AVHRR NDVI dataset.’ The WEI is defined as the fraction of the precipitation to the potential evaporation. The WAI was calculated by accumulating the monthly mean temperature of the portion exceeded 5