气候变化对全球生态系统碳循环的影响

Impacts of Climate Change on Global Carbon Cycle in Ecosystem

气候变化是全球变化的主要表现之一,它对全球陆地生态系统碳循环有着巨大的影响,具体表现在气温和降水两个方面。全球生态系统碳循环有多种影响因子,本文主要阐述NPP和土壤碳呼吸与气温和降水之间的关系。研究表明,气温与NPP表现出一定的纬度地带性;气候变暖会增加土壤呼吸,不过超过最适温度,土壤呼吸减弱,表现出一定的适应性;随着降水格局的改变,在不同时间尺度和地区上,NPP与降水关系也不同;在一定降水范围内,降水量对土壤呼吸的作用是不同的。水分对土壤呼吸的抑制作用会随降水的增加而减小。

Climate change is one of the main manifestations of global change.It has a huge impact on the global terrestrial ecosystem carbon cycle,which is reflected in both temperature and precipitation.The global ecosystem carbon cycle carbon cycle has a variety of impact factors.This paper mainly describes the relationship between NPP and soil carbon respiration and temperature and precipitation.There are some conclusions:temperature and NPP show a certain latitudinal zonal;climate warming will increase soil respiration,but soil moisture is weaker than the optimum temperature,showing a certain adaptability;in the pattern of precipitation change,NPP and precipitation are different in different time scales and regions;in a certain precipitation range,the effect of precipitation on soil respiration is different.The inhibition of soil moisture on soil respiration decreases with increasing precipitation.