Analyses on Climates and Vegetation Productivity Backgroundat Haibei Alpine Meadow Ecosystem Research Station

At first, the characteristics of surface air temperature and precipitation at Haibei Alpine Meadow Ecosystem Research Station in the recent 40 years were analyzed. Then, on the basis of investigation of different vegetaton type distributions and the measurements of above-and bellow-ground diomass of Haibei alpine meadow ecosystem in the recent 20 years, the backgrounds of vegetation distribution were analyzed and generalized. At the same time, the influence of the meteorological condition on machanism and relation of herbage yield, as well as the response of alpine meadow vegetation to the global warming were discussed. Its aim is to provide the database and basis for studing the structare, function, energy flow, substance cycle, and raising the estabishment of biological productivity pattern in alpine meadow ecosystem, and also to provide the basic background about climate and vegetation for different field researchs at Haibei Station.