海北高寒草甸生态系统定位站气候、植被生产力背景的分析

首先分析了中国科学院海北高寒草甸生态系统定位站近40多年来气温、降水的变化特征；其次分析和总结近20年来海北高寒草甸生态系统不同植被类型分布及地上生物量；同时探讨了对气象条件影响牧草产量的机制及关系，以及高寒草甸植被对气候变暖的响应。本文的目的是为高寒草甸生态系统的结构、功能、能量流动及物质循环等研究，以及提高生物生产力途径模式的建立提供依据，也为从事海北站不同学科的研究工作提供气候及植被的背景情况。

Analyses on Climates and Vegetation Productivity Background at 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.