藏北高原气候变化与植被生长状况

An overview of climate change and vegetation growth in Northern Tibet

概述了近年来对西藏藏北地区气候变化与植被生长状况的研究进展。总结发现,藏北的那曲地区总体在向暖湿方向发展,有利于植被生长和生态环境的改善;阿里地区则有暖干化发展趋势,对牧草的生长有不利影响。诸多气候因子——最低气温、水汽压、平均气温、最高气温和降水量等对植被生长均有一定的影响。对藏北高原植被变化的研究表明,牧草都呈现出退化趋势,导致草地退化的主要因素,除自然天气气候因素外,人类活动不可忽视。

This paper summarized the advances of climate change and vegetation growth in northern Tibet during the past few years.Results showed that the main tendency was becoming warmer and more humid in Nagqu area which is benefit to the improvement of vegetation growth and ecological environment,but Ali area is becoming warmer and drier which has opposite effect on vegetation growth.Previous studies indicated that many meteorological factors have affected vegetation growth to some extent such as minimum temperature,water vapor pressure,average temperature,maximum temperature and precipitation and so forth.The research of vegetation variation indicated that grassland presented degradation tendency in northern Tibet.Besides,the growth of human population and intensified urbanization are major factors that affecting vegetation change.Therefore,human activity could not be neglected except for the meteorological condition as one of main factors in grassland degradation.