GoAmazon â Scaling Amazon Carbon Water Couplings

doi:10.2172/1321708

GSTDTAP > 地球科学

DOI	10.2172/1321708
报告编号	LA-UR--16-26740
来源ID	OSTI ID: 1321708
	GoAmazon â Scaling Amazon Carbon Water Couplings
	Dubey, Manvendra Krishna
	2016-09-06
出版年	2016
页数	9
语种	英语
国家	美国
领域	地球科学
英文摘要	Forests soak up 25% of the carbon dioxide (CO₂) emitted by anthropogenic fossil energy use (10 Gt C y^-1) moderating its atmospheric accumulation. How this terrestrial CO₂ uptake will evolve with climate change in the 21st century is largely unknown. Rainforests are the most active ecosystems with the Amazon basin storing 120 Gt C as biomass and exchanging 18 Gt C y^-1 of CO₂ via photosynthesis and respiration and fixing carbon at 2-3 kg C m^-2 y^-1. Furthermore, the intense hydrologic and carbon cycles are tightly coupled in the Amazon where about half of the water is recycled by evapotranspiration and the other half imported from the ocean by Northeasterly trade winds. Climate models predict a drying in the Amazon with reduced carbon uptake while observationally guided assessments indicate sustained uptake. We will resolve this huge discrepancy in the size and sign of the future Amazon carbon cycle by performing the first simultaneous regional scale high frequency measurements of atmospheric CO₂, H₂O, HOD, CH₄, N₂O and CO at the T3 site in Manacupuru, Brazil as part of DOE's GoAmazon project. Our data will be used to inform and develop DOE's CLM on the tropical carbon-water couplings at the appropriate grid scale (10-50km). Our measurements will also validate the CO₂ data from Japan's GOSAT and NASA's imminent OCO-2 satellite (launch date July 2014).
英文关键词	Planetary Sciences Climate Carbon Tropics Forests CO2 Water
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来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/7258
专题	地球科学
推荐引用方式 GB/T 7714	Dubey, Manvendra Krishna. GoAmazon â Scaling Amazon Carbon Water Couplings,2016.