Publication Date:
2010-08-21
Description:
Terrestrial net primary production (NPP) quantifies the amount of atmospheric carbon fixed by plants and accumulated as biomass. Previous studies have shown that climate constraints were relaxing with increasing temperature and solar radiation, allowing an upward trend in NPP from 1982 through 1999. The past decade (2000 to 2009) has been the warmest since instrumental measurements began, which could imply continued increases in NPP; however, our estimates suggest a reduction in the global NPP of 0.55 petagrams of carbon. Large-scale droughts have reduced regional NPP, and a drying trend in the Southern Hemisphere has decreased NPP in that area, counteracting the increased NPP over the Northern Hemisphere. A continued decline in NPP would not only weaken the terrestrial carbon sink, but it would also intensify future competition between food demand and proposed biofuel production.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhao, Maosheng -- Running, Steven W -- New York, N.Y. -- Science. 2010 Aug 20;329(5994):940-3. doi: 10.1126/science.1192666.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Numerical Terradynamic Simulation Group, Department of Ecosystem and Conservation Sciences, the University of Montana, Missoula, MT 59812, USA. zhao@ntsg.umt.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20724633" target="_blank"〉PubMed〈/a〉
Keywords:
*Atmosphere
;
Biomass
;
Carbon/*metabolism
;
*Droughts
;
Ecosystem
;
Plants/*metabolism
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
