全球变化的几个侧面.pptVIP

Vegetation distribution of China and its responses to climate change Ensheng Weng Geographic features of China Summer circulation Tibetan Plateau plays a critical role Winter circulation Tibetan Plateau plays a critical role Climate-Vegetation Relationships Climate determines vegetation distribution Precipitation and temperature are two key factors Vegetation of China Vegetation of China Vegetation of China Vegetation of China Vegetation of China How it response to climate change Scenarios at the end of 21st century BIOME model Defined 14 plant functional types (PFTs); Assigned a climatic envelope for every PFT; porsposed a rule to regulate the co-exist of PFTs; Biomes (vegetation types) are the combinations of PFTs. BIOME model BIOME model Calibration Calibration Calibration Calibration The results from new parameters Vulnerable areas Northern China Southwestern China Tibetan Plateau Effects on Human being * South-west monsoon South-east monsoon Westerly jet Westerly jet Tibetan cold high Siberia-Mongolian cold high Climate of China Climate of China T (Jan.) T (Jul.) from Whittaker, 1975 Wu, CY, 1980. Vegetation of China Wu, CY, 1980. Vegetation of China Tropical forest Sub-Tropical forest Temperate forest Mixed forest Taiga - + Wu, CY, 1980. Vegetation of China Forest Meadow steppe Typical steppe Desert steppe Desert + - Wu, CY, 1980. Vegetation of China Conifer forests Alpine meadows Alpine steppes Alpine deserts Wu, CY, 1980. Vegetation of China Conifer forests Alpine meadows Alpine steppes Alpine deserts Forest Meadow steppe Typical steppe Desert steppe Desert + - Tropical forest Sub-Tropical forest Temperate forest Mixed forest Taiga - + Changes of Temperature in past 50 years Northern area Central China Changes of Precipitation in past 50 years CO2 SRES-A2 CO2 SRES-B2 Simulated map from original parameters the boundary between forests and steppes forests shift southwards Priestley-Taylor coefficient Temperature of January The same PFTs occur in the co