| Now people pay more attention to the research of Global Change and biodiversity . Vegetation is often used as the index of global change and region stabilization because of its sensitivity . So the research of the relationship between vegetation and climate becomes the frontal and emphasis in crossed subject study . Especially , the relationship between distribution of vegetation and climate , the relationship between natural vegetation Net Primary Productivety (NPP) and climate , the possible response to Global Change , and forest dynamics based on vegetation ecophysiology and process analysis become the focus in many subjects .The research of the relationship between Global Change and vegetation is now emphasized particularly on the larger scaled , macroscopical and abstract study . But the smaller scaled , microcosmic and specific study needs more work . In this paper we analyze the forest vegetation in the east upland area of Northeast China quantitatively by using the eco-climate factor's of Thornthwaite. We use the Global Climate Grid (0.5*0.5) (Leemans and Cramer, 1990) in our research. By using the average temperature per-month and the average precipitation per-year of 1775 sites calculate the factors of PE % IM> WI and HI .By using the calculating method of PWH (Wu Zhengfang ,Xu Wenduo),we define 30 main species of trees and the index of distribution of temperature and water of the zonal vegetation type in the east upland area of Northeast China. By using the software Sufer ,we create the distribution plot of IM and PE and define the eco-climate index of horizontal zonal vegetation type .By using software Spss, we give the regression equation of IE and PE respectively and calculate the index of temprature efficiency and the distributing altitude of vertical vegetation zones on the different slope of Changbai Mountain. And from the database of 1:200,000 getting from ArcGISS.l ,we create the figure ofrelationship between the index of temprature efficiency and the distributing altitude of vertical vegetation zones on the different slope of Changbai Mountain.The research upwards indicate that the method of Thornthwaite play a positive role in the research of eco-climate . It's a effective method by using vegetation as the index of eco-climate study in east area . |
