| DOI: | 10.2172/1236603
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| 报告号: | DOE/SC-ARM--15-028
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| 报告题名: | Precision Gas Sampling (PGS) Validation2011-2014 Final Campaign Report |
| 作者: | Tom, M. S.; Fischer, M. L.; Biraud, S. C.; Billesbach, D.
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| 出版年: | 2016
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| 发表日期: | 2016-01-01
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| 总页数: | 11
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| 国家: | 美国
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| 语种: | 英语
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| 中文主题词: | 农业科学
; 地表
; 干旱
; 大气辐射
; 高温
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| 主题词: | AGRICULTURE
; LAND SURFACE
; DROUGHT
; ATMOSPHERIC RADIATION
; DROUGHTS
; HEAT
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| 英文摘要: | In this field campaign, we used eddy covariance towers to quantify carbon, water, and energy fluxes from a pasture and a wheat field that were converted to switchgrass. The U.S. Department of Energy is investing in switchgrass as a cellulosic bioenergy crop, but there is little data available that could be used to develop or test land surface model representations of the crop. This campaign was a collaboration between Lawrence Berkeley National Laboratory and the U.S. Department of Agriculture Agricultural Research Service. Unfortunately, in 2011, Oklahoma had one of the most severe droughts on record, and the crop in one of the switchgrass fields experienced almost complete die-off. The crop was replanted, but subsequent drought conditions prevented its establishment. Then, in April 2012, a large tornado demolished the instruments at our site in Woodward, Oklahoma. These two events meant that we have some interesting data on land response to extreme weather; however, we were not able to collect continuous data for annual sums as originally intended. We did observe that, because of the drought, the net ecosystem exchange of CO2 was much lower in 2011 than in 2010. Concomitantly, sensible heat fluxes increased and latent heat fluxes decreased. These conditions would have large consequences for land surface forcing of convection. Data from all years were submitted to the Atmospheric Radiation Measurement Climate Research Facility Data Archive, and the sites were registered in AmeriFlux. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1236603
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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/42313
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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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| 1236603.pdf（963KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Tom, M. S.,Fischer, M. L.,Biraud, S. C.,et al. Precision Gas Sampling (PGS) Validation2011-2014 Final Campaign Report. 2016-01-01.
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