Tendency Research Of Ecological Environment And Climate Change In Recent 100 Years In Source Regions Of Yangtse River, Yellow River And Lantsang River

The source region of Yangtze River, Yellow River and Lantsang River (SYYL) is located in the center of Qinghai-Xizang Plateau. It is the cradle of Yangtze River, Yellow River and Lantsang River. The region not only has important ecology position, but also influences global climate change. Ecology environment degeneration is obviously in the SYYL in recent dozens of year. And it has menace the ecological safe of Yangtze River, Yellow River and Lantsang River. How to protect natural ecology environment of the SYYL has became an important object.The paper analyzed the basic climate characterizations, the rulers of climate change in recent dozes of years on the basis of climatic data during 1961 to 2002 in the SYYL. Reconstructed the series data of air temperature and precipitation in recent 600 years by mean of tree ring data in typical area. Predicted the climate scene in the future by use of climate models. Analyzed the variational feathers of main ecological systems and factors through investigation of variation circulations of ecology environment in SYYL I recent dozes of years. Researched the mechanisms of ecology system influenced by the variation of ecology environment and climate change especially. The chief reason of degeneration of ecology environment is climate change. Predicted the ecology environment variation in the case of climate change in the future.1. The SYYL has important ecology position. It is the cradle and water source of Yangtze River, Yellow River and Lantsang River. It can affect the hydrographic environment of downstream of Yangtze River, Yellow River and Lantsang River. In the other hand, The SYYL is important part of Qinghai-Xizang Plateau, also.Qinghai-Xizang plateau is startup region of global climate change. Its range of climate change is higher than other region in all over China, and it has indicative meaning to Chinese tendency variation of climate change. Snow area in the region is a coefficient index of predicting precipitation tendency in other...