【摘 要】
：
Recent climatic changes have affected terrestrial net primary productivity (NPP). This paper presents an investigation of the impact of climatic changes on Chin
【机 构】
：
State Key Laboratory of Earth Surface Processes and Resource Ecology
论文部分内容阅读
Recent climatic changes have affected terrestrial net primary productivity (NPP). This paper presents an investigation of the impact of climatic changes on Chinese terrestrial vegetation NPP by analyzing 18 years (1982 to 1999) climatic data and satellite observations of vegetation activity. Results indicate that climatic changes in China have eased some critical climatic constraint on plant growth. (1) From 1982 to 1999, modeled NPP increased by 1.42%·a-1 in water-limited regions of Northwest China, 1.46%·a-1 in temperature-limited regions of Northeast China and Tibet Plateau, and 0.99%·a-1 in radiation-limited regions of South China and East China. (2) NPP increased by 24.2%, i.e. 0.76 petagram of carbon (Pg C) over 18 years in China. Changes in climate (with constant vegetation) directly contributed nearly 11.5% (0.36 Pg C). Changes in vegetation (with constant climate) contributed 12.4% (0.40 Pg C), possibly as a result of climate-vegetation feedbacks, changes in land use, and growth stimulation from other mechanisms. (3) Globally, NPP declined during all three major El Nino events (1982 to 1983, 1987 to 1988, and 1997 to 1998) between 1982 and 2000, but Chinese vegetation productivity responded differently to them because of the monsoon dynamics. In the first three events (1982 to 1983, 1987 to 1988, and 1992), Chinese vegetation NPP declined, while in the later two events (1993, 1997 to 1998) increasing obviously.
其他文献
In this paper, an economical cascadic multigrid method is proposed. Compared with the usual cascadic multigrid method developed by Bornemann and Deuflhard, the
A novel advanced oxidation process-wet electrocatalytic oxidation(WEO)was studied with p-nitrophenol as model pollutant and β-PbO2 electrode as the anode.Compa
扰流柱是微颗粒捕集增效装置的重要核心部件,流场扰流特性的好坏直接影响到正负荷电颗粒的掺混和聚并效果,引入了二维LES模型,简化扰流区几何模型为二维狭长空间单圆柱扰流,
Interactions between model target peptide melittin (ME) and Euplotes octocarinatus centrin (EoCen) were investigated by fluorescence spectra, circular dichroism
真核细胞内细胞器的酸性环境是内吞作用、溶酶体酶分泌等生理活动的重要条件，液泡三磷酸腺苷酶（ vacuolar ATPases， V-ATP）和氯离子通道（ chloride channel， CLC）家族在真核细胞内各
The study was conducted to investigate fasting effects on flesh composition and antioxidant defenses of market-size Sparus macrocephalus. Two hundred fish (main
In this paper,NetSLab network platform for remote collaborative pseudo-dynamic testing,which was developed recently by a research group led by the Hunan Univers
Heteromeric acetyl-coanzyme A(CoA)carboxylese(ACCase)catalyzes the formation of malonyl-CoA from acetyl-CoA.It plays an essential role in fatty acid synthesis i
Large quantities of di-tert-butyl peroxide(DTBP)have been emitted into the troposphere due to human activities.Its role in the atmospheric photochemical reactio
Based on remote sensing data on land use provided by the Chinese Academy of Sciences and socioeconomic data collected by the authors, this paper analyzes the tr