世纪初十年气候变异和极端气候对全球陆地净初级生产力的影响（英文）

编号 zgly0001584812

文献类型 期刊论文

文献题名 世纪初十年气候变异和极端气候对全球陆地净初级生产力的影响（英文）

作者 潘淑芬  田汉勤  DANGALShreeR.S.  欧阳志云  吕超群  杨佳  陶波  任巍  BANGERKamaljit  杨其纯  张博闻 

作者单位 InternationalCenterforClimateandGlobalChangeResearch  SchoolofForestryandWildlifeSciences  AuburnUniversity  StateKeyLaboratoryofUrbanandRegionalEcology  ResearchCenterforEco-EnvironmentalSciences  CAS 

母体文献 Journal of Geographical Sciences 

年卷期 2015年09期

年份 2015 

分类号 Q148  P467 

关键词 climatevariability  climateextreme  drought  globalterrestrialecosystem  netprimaryproduction(NPP) 

文摘内容 A wide variety of studies have estimated the magnitude of global terrestrial net primary production(NPP), but its variations, both spatially and temporally, still remain uncertain. By using an improved process-based terrestrial ecosystem model(DLEM, Dynamic Land Ecosystem Model), we provide an estimate of global terrestrial NPP induced by multiple environmental factors and examine the response of terrestrial NPP to climate variability at biome and global levels and along latitudes throughout the first decade of the 21 st century. The model simulation estimates an average global terrestrial NPP of 54.6 Pg C yr–1 during 2000–2009, varying from 52.8 Pg C yr–1 in the dry year of 2002 to 56.4 Pg C yr–1 in the wet year of 2008. In wet years, a large increase in terrestrial NPP compared to the decadal mean was prevalent in Amazonia, Africa and Australia. In dry years, however, we found a 3.2% reduction in global terrestrial NPP compared to the decadal mean, primarily due to limited moisture supply in tropical regions. At a global level, precipitation explained approximately 63% of the variation in terrestrial NPP, while the rest was attributed to changes in temperature and other environmental factors. Precipitation was the major factor determining inter-annual variation in terrestrial NPP in low-latitude regions. However, in mid- and high-latitude regions, temperature variability largely controlled the magnitude of terrestrial NPP. Our results imply that projected climate warming and increasing climate extreme events would alter the magnitude and spatiotemporal patterns of global terrestrial NPP.