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| Hideyuki Shimizu | |
| Research Program manager | |
| Center for Global Environmental Research, | |
| National Institute for Environmental Studies | |
| Environment Agency | |
| Onogawa 16-2, Tsukuba, Ibaraki 305-0053, Japan | |
| Tel: +81-298-50-2347, Fax: +81-298-58-2645 | |
| E-mail: hshimizu@nies.go.jp |
16,399,000 Yen
(FY 1998; 5,413,000 Yen)
To study the effects of "global warming" on forest/grassland in China, we collected data of vegetation, climate, etc. and seeds of some tree species commonly grown in China. Using climate data and MRI-CGCM-global warming scenario (1% CO2 increase/year during the coming 100 years), it predicted that annual mean temperature, Warmth Index and Effective Accumulated Temperature in China would increase, and the increase ratio would be greater in north area than in south. Global warming also would slightly promote the aridity in China. Experiments on the effects of global warming on growth of 4 main Chinese tree species were conducted using environment-controlled growth cabinets. Temperature higher than c.30℃ decreased the growth of all species examined, especially, Cunninghamia lanceolata. Dry condition (low RH) restricted the growth of Pinus massoniana. Growth analysis revealed that the reduction of RGR caused by heat-stress or water-deficient stress was due to a reduction of NAR, however, the partitioning of photosynthate was hardly affected. It suggested that global warming would change the distribution of tree species in forest of China in the future.
China, Environment changes, Forest/grassland, Global warming, Growth