| DOI: | 10.2172/1302243
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| 报告号: | DOE/SC--ARM-16-044
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| 报告题名: | Green Ocean Amazon 2014/15 â Scaling Amazon Carbon Water Couplings Field Campaign Report |
| 作者: | Dubey, Manvendra; Parket, Harrison; Myers, Katherine; Rahn, Thom; Christoffersson, B.; Wunch, Debra; Wennberg, Paul
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| 出版年: | 2016
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| 发表日期: | 2016-08-01
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| 总页数: | 12
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | Amazon
; rainforest carbon cycle
; Fourier Transform Spectrometer
; trace gas column tropical ecosystem carbon cycle models
; evapotranspiration
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| 中文主题词: | 碳
; 氮
; 蒸散
; 森林
; 生物量
; 二氧化碳
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| 主题词: | CARBON
; NITROGEN
; EVAPOTRANSPIRATION
; FORESTS
; BIOMASS
; CARBON DIOXIDE
|
| 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 set out to 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 2014/15 project. Our data will be used to inform and develop DOE's Community Land Model (CLM) on the tropical carbon-water couplings at the appropriate grid scale (10-50 km). Our measurements will also validate the CO2 data from Japan's Greenhouse gases Observing Satellite (GOSAT) and NASA's Orbiting Carbon Observatory (OCO)-2 satellite (launched in July, 2014). Our data addresses these science questions: 1. How does ecosystem heterogeneity and climate variability influence the rainforest carbon cycle? 2. How well do current tropical ecosystem models simulate the observed regional carbon cycle? 3. Does nitrogen deposition (from the Manaus, Brazil, plume) enhance rainforest carbon uptake? |
| URL: | http://www.osti.gov/scitech/servlets/purl/1302243
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/42045
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1302243.pdf（776KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Dubey, Manvendra,Parket, Harrison,Myers, Katherine,et al. Green Ocean Amazon 2014/15 â Scaling Amazon Carbon Water Couplings Field Campaign Report. 2016-01-01.
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