Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074324 |
Partitioning evapotranspiration using long-term carbon dioxide and water vapor fluxes | |
Scott, Russell L.; Biederman, Joel A. | |
2017-07-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:13 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The separate components of evapotranspiration (ET) elucidate the pathways and time scales over which water is returned to the atmosphere, but ecosystem-scale measurements of transpiration (T) and evaporation (E) remain elusive. We propose a novel determination of E and T using multiyear eddy covariance estimates of ET and gross ecosystem photosynthesis (GEP). The method is applicable at water-limited sites over time periods during which a linear regression between GEP (abscissa) and ET (ordinate) yields a positive ET axis intercept, an estimate of E. At four summer-rainfall semiarid sites, T/ET increases to a peak coincident with maximum GEP and remains elevated as the growing season progresses, consistent with previous, direct measurements. The seasonal course of T/ET is related to increasing leaf area index and declining frequency of rainy days-an index of the wet surface conditions that promote E-suggesting both surface and climatic controls on ET partitioning. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000406257400043 |
WOS关键词 | SEMIARID GRASSLAND ; CHIHUAHUAN DESERT ; USE EFFICIENCY ; TRANSPIRATION ; DYNAMICS ; ISOTOPE ; EVAPORATION ; EXCHANGE ; FOREST ; ATMOSPHERE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/27533 |
专题 | 气候变化 |
作者单位 | ARS, Southwest Watershed Res Ctr, USDA, Tucson, AZ 85719 USA |
推荐引用方式 GB/T 7714 | Scott, Russell L.,Biederman, Joel A.. Partitioning evapotranspiration using long-term carbon dioxide and water vapor fluxes[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(13). |
APA | Scott, Russell L.,&Biederman, Joel A..(2017).Partitioning evapotranspiration using long-term carbon dioxide and water vapor fluxes.GEOPHYSICAL RESEARCH LETTERS,44(13). |
MLA | Scott, Russell L.,et al."Partitioning evapotranspiration using long-term carbon dioxide and water vapor fluxes".GEOPHYSICAL RESEARCH LETTERS 44.13(2017). |
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