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利用AVIM(植被与大气相互作用模式)模拟了末次冰盛期(21kaBP)、全新世中期(6kaBP)及现代中国陆地植被净初级生产力(NPP)的大小与分布特征,计算了3个时期陆地植被NPP的碳总量.研究结果表明,冰期-间冰期尺度下的东亚夏季风的变化是影响中国陆地植被NPP变化的主要原因,21kaBP时期中国陆地植被NPP最小,平均值为208gC/m2·a,NPP碳总量为2.05Pg/a;6kaBP时期NPP最大,平均值为409gC/m2·a,NPP碳总量为3.89Pg/a;现代陆地植被的NPP年平均值为355gC/m2·a,NPP碳总量为3.33Pg/a,温暖湿润时期中国陆地植被的NPP比寒冷干旱时期要高.对3个不同气候时期温度和降水与陆地植被NPP的相关性分析表明,温度是影响21kaBP中国陆地植被NPP的主要气候因子,而降水是影响6kaBP以及现代植被NPP的主要因子.
The size and distribution characteristics of net primary productivity (NPP) of terrestrial vegetation in the last ice age (21ka BP), mid-Holocene (6kaBP) and modern China were simulated by AVIM (vegetation-atmosphere interaction model) NPP.The results show that the change of East Asian summer monsoon under the glacial-interglacial scale is the main reason for the change of terrestrial NPP in China. The NPP of terrestrial vegetation in China is the smallest in the 21ka BP period, with an average of 208gC / m2 · a, NPP is 2.05Pg / a in the period of 6kaBP, the average is 409gC / m2 · a in 6kaBP, and the total NPP is 3.89Pg / a in the 6kaBP. The average annual NPP of modern terrestrial vegetation is 355gC / m2 · a, NPP The total amount of carbon is 3.33Pg / a, and the NPP of terrestrial vegetation in China is higher than that in cold and dry period in warm and humid period.Correlation analysis between temperature and precipitation and terrestrial vegetation NPP in three different climates shows that the temperature is the influence of 21kaBP China terrestrial vegetation NPP is the main climatic factor, while precipitation is the main factor affecting 6kaBP and modern vegetation NPP.