The effects of air temperature and precipitation on the net primary productivity in China during the early 21st century

查看全文 作　　者：Qianfeng [1,2,3]WANG;Jingyu [1,2,3]ZENG;Song [4]LENG;Bingxiong [1,2,3]FAN;Jia [1,2,3]TANG;Cong [5]JIANGs;Yi [1,2,3]HUANG;Qing [6]ZHANG;Yanping [7,8]QU;Wnlin [1,2,3]WANG;Wei [1,2,3]SHUI

机构地区：[1]College of Environment and Resource,Fuzhou University,Fuzhou 350116,China;[2]Key Laboratory of Spatial Data Mining &Information Sharing,Ministry of Education of China,Fuzhou 350116,China;[3]Fujian Provincial Key Laboratory of Remote Sensing of Soil Erosion and Disaster Protection,Fuzhou 350116,China;[4]Climate Change Cluster,University of Technology Sydney,Broadway,New South Wales 2007,Australia;[5]College of Biological Science and Engineering,Fuzhou University,Fuzhou 350116,China;[6]Key Laboratory of Digital Earth Science,Institute of Remote Sensing and Digital Earth,Chinese Academy of Sciences,Beijing 100094,China;[7]China Institute of Water Resources and Hydropower Research,Beijing 100038,China;[8]Research Center on Flood and Drought Disaster Reduction,Beijing 100038,China

出　　处：《Frontiers of Earth Science》索引2018年第12卷第4期,共16页

摘　　要：Research on how terrestrial ecosystems respond to climate change can reveal the complex interactions between vegetation and climate,net primary productivity (NPP),an important vegetation parameter and ecological indicator,fluctuates within any given ecological environment or regional carbon budget.In this study, spatial interpolation was used to generate a spatial dataset, with 1-km spatial resolution,with meteorological data from 736 observation stations across China.An improved CASA model was used to simulate NPP over the period of 2001-2013 by taking into account land-cover change in every year during the same period.We propose the grid- based spatial patterns and dynamics of annual NPP,annual average temperature,and annual total precipitation based on the model.We also used the model to demonstrate the spatial correlation between NPP,temperature,and pre- cipitation in the study area with special focus on the impact of climate change in the early 21st century.Results showed that the spatial pattern of NPP over all of China is characterized by higher values in the southeast and lower values in the northwest.The spatial pattern of temperature indicates substantial latitudinal differences across the country,and the spatial pattem of precipitation shows a ribbon of decline from the southeast coast to the northwest inland.Most areas show an upward trend in NPP. Temperatures appear to decrease across the country during the global warming hiatus (1998-2008),and are accom- panied by an increase in precipitation over most regions.The correlation between NPP and annual average temperature is weak.Alternatively,NPP and annual total precipitation are positively correlated in northern and central China at a coefficient above 0.64(p <0.01)yet negatively correlated in the eastem parts of the Qinghai- Tibet Plateau and Sichuan Basin.Results can provide useful information for improving parameters for calibra- tion of the terrestrial ecosystem process model. 关键词：IMPACT AIR TEMPERATURE PRECIPITATION NPP China

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The effects of air temperature and precipitation on the net primary productivity in China during the early 21st century

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