|Study on The Vegetation-Climate Quantitative Relationship in The Northern Tibetan Plateau Based on Holdridge Prototype
|Place of Conferral
|In this paper, the annual precipitation, annual mean biological temperature and possible evapotranspiration data of 30 years from 1980 to 2009 are used to simulate the vegetation distribution in the northern Tibetan Plateau based on the Holdridge Life Zone Model, and the following conclusions are drawn:
(1) From 1980 to 2009, the annual mean biological temperature and annual mean precipitation showed a fluctuating upward trend. The annual mean biological temperature increased about 0.13℃ every decade, with a significant increase. The annual mean precipitation increased about 0.445mm per year. In the study area, the annual mean biological temperature was lower in the areas with high altitudes and higher in the areas with low altitudes, and the temperature was greatly affected by the altitude. Precipitation was high in the southeast and low in the northwest. It is possible that the distribution of evapotranspiration rate is consistent with the distribution of temperature, that is, the region with high altitude may have a low evapotranspiration rate;otherwise, it is high.
(2) The vegetation types selected in this study are based on the degree of influence of climate on vegetation. The seven vegetation types adopted are snow and ice, sparse alpine vegetation, alpine grassland vegetation, subalpine shrub, mountain forest, mountain grassland and mountain desert. The actual vegetation (northern qinghai-tibet plateau vegetation classification figure 2000) distribution location and distribution of surface data extraction an average annual rainfall, annual average temperature, potential evapotranspiration rate data, through these three kinds of data analysis of the mean and standard deviation of each type of vegetation distribution, the distribution of the climate factors simulate Holdridge life zone model of them, The potential vegetation in the northern part of the Qinghai-Tibet Plateau during 1980-2009 was simulated. The change of area proportion of various vegetation was analyzed. In the case that the annual mean biological temperature and annual precipitation both had a slow increasing trend, the coverage area of alpine grassland vegetation, mountain grassland, mountain shrub and mountain forest vegetation with larger water demand and higher growing temperature increased significantly in the study area. The area proportion of snow, snow and alpine sparse vegetation decreased greatly. The area of mountain desert increased relatively.
|First Author Affilication
|College of Earth Environmental Sciences
李雪霜. 基于Holdridge原型的青藏高原北部植被——气候定量关系研究[D]. 兰州. 兰州大学,2021.
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