Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD026740 |
The influence of land cover on surface energy partitioning and evaporative fraction regimes in the US Southern Great Plains | |
Bagley, Justin E.1; Kueppers, Lara M.1,2; Billesbach, Dave P.3; Williams, Ian N.1; Biraud, Sebastien C.1; Torn, Margaret S.1,2 | |
2017-06-16 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Land-atmosphere interactions are important to climate prediction, but the underlying effects of surface forcing of the atmosphere are not well understood. In the U.S. Southern Great Plains, grassland/pasture and winter wheat are the dominant land covers but have distinct growing periods that may differently influence land-atmosphere coupling during spring and summer. Variables that influence surface flux partitioning can change seasonally, depending on the state of local vegetation. Here we use surface observations from multiple sites in the U.S. Department of Energy Atmospheric Radiation Measurement Southern Great Plains Climate Research Facility and statistical modeling at a paired grassland/agricultural site within this facility to quantify land cover influence on surface energy balance and variables controlling evaporative fraction (latent heat flux normalized by the sum of sensible and latent heat fluxes). We demonstrate that the radiative balance and evaporative fraction are closely related to green leaf area at both winter wheat and grassland/pasture sites and that the early summer harvest of winter wheat abruptly shifts the relationship between evaporative fraction and surface state variables. Prior to harvest, evaporative fraction of winter wheat is strongly influenced by leaf area and soil-atmosphere temperature differences. After harvest, variations in soil moisture have a stronger effect on evaporative fraction. This is in contrast with grassland/pasture sites, where variation in green leaf area has a large influence on evaporative fraction throughout spring and summer, and changes in soil-atmosphere temperature difference and soil moisture are of relatively minor importance. |
英文关键词 | land-atmosphere interactions water-energy interactions agricultural systems |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000404131800015 |
WOS关键词 | ATMOSPHERE COUPLING EXPERIMENT ; SOIL-MOISTURE ; UNITED-STATES ; LONG-TERM ; PART I ; PRECIPITATION ; VEGETATION ; CLIMATE ; MODEL ; WATER |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33567 |
专题 | 气候变化 |
作者单位 | 1.Lawrence Berkeley Natl Lab, Climate & Ecosyst Sci Div, Berkeley, CA 94720 USA; 2.Univ Calif Berkeley, Energy & Resources Grp, Berkeley, CA 94720 USA; 3.Univ Nebraska, Dept Biol Sci Engn, Lincoln, NE USA |
推荐引用方式 GB/T 7714 | Bagley, Justin E.,Kueppers, Lara M.,Billesbach, Dave P.,et al. The influence of land cover on surface energy partitioning and evaporative fraction regimes in the US Southern Great Plains[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(11). |
APA | Bagley, Justin E.,Kueppers, Lara M.,Billesbach, Dave P.,Williams, Ian N.,Biraud, Sebastien C.,&Torn, Margaret S..(2017).The influence of land cover on surface energy partitioning and evaporative fraction regimes in the US Southern Great Plains.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(11). |
MLA | Bagley, Justin E.,et al."The influence of land cover on surface energy partitioning and evaporative fraction regimes in the US Southern Great Plains".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.11(2017). |
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