Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020642 |
Evaluating climate and soil effects on regional soil moisture spatial variability using EOFs | |
Wang, Tiejun1,2; Franz, Trenton E.2; Li, Ruopu3; You, Jinsheng2; Shulski, Martha D.2; Ray, Chittaranjan4 | |
2017-05-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:5 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Soil moisture is an important state variable in terrestrial water cycles; however, only few studies are available on regional soil moisture spatial variability (SMSV), which yielded inconsistent findings about regional controls on SMSV. Here, long-term soil moisture data were obtained from the Automated Weather Data Network and Soil Climate Analysis Network in three regions with different climate regimes across the continental U.S. Comprehensive data sets were compiled to examine regional controls on SMSV using the method of Empirical Orthogonal Function. One dominant spatial structure (EOF1) of soil moisture was found in the study regions, which explained over 75%, 67%, and 86% of the spatial variance in soil moisture in Nebraska, Utah, and the Southeast U.S., respectively. Despite the significant spatial variability in precipitation and potential evapotranspiration in all the study regions, the results showed that meteorological forcings had limited effects on regional SMSV in those regions with different climatic conditions, which differed from the traditional notion that SMSV is mainly controlled by meteorological forcings at the scale from 50 to 400 km. Instead, local factors related to soil (e.g., sand and clay fractions) were found to have significant correlations with EOF1, although the effects of other local factors (e.g., topography and vegetation) were generally negligible. This study provides strong field evidence that soil can exert much stronger impacts on regional SMSV than previously thought, which can override the effects of meteorological forcings. Future studies are still needed to elaborate on the relative roles of climate and soil in affecting regional SMSV. |
英文关键词 | soil moisture Empirical Orthogonal Function spatial pattern regional scale AWDN SCAN |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000403712100030 |
WOS关键词 | EMPIRICAL ORTHOGONAL FUNCTIONS ; TEMPORAL STABILITY ; LARGE-SCALE ; PATTERNS ; CATCHMENT ; SIMULATIONS ; LANDSCAPES ; DYNAMICS ; RECHARGE ; RUNOFF |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
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/21313 |
专题 | 资源环境科学 |
作者单位 | 1.Tianjin Univ, Inst Surface Earth Syst Sci, Tianjin, Peoples R China; 2.Univ Nebraska Lincoln, Sch Nat Resources, Lincoln, NE 68588 USA; 3.Southern Illinois Univ, Dept Geog & Environm Resources, Carbondale, IL USA; 4.Univ Nebraska Lincoln, Nebraska Water Ctr, Lincoln, NE USA |
推荐引用方式 GB/T 7714 | Wang, Tiejun,Franz, Trenton E.,Li, Ruopu,et al. Evaluating climate and soil effects on regional soil moisture spatial variability using EOFs[J]. WATER RESOURCES RESEARCH,2017,53(5). |
APA | Wang, Tiejun,Franz, Trenton E.,Li, Ruopu,You, Jinsheng,Shulski, Martha D.,&Ray, Chittaranjan.(2017).Evaluating climate and soil effects on regional soil moisture spatial variability using EOFs.WATER RESOURCES RESEARCH,53(5). |
MLA | Wang, Tiejun,et al."Evaluating climate and soil effects on regional soil moisture spatial variability using EOFs".WATER RESOURCES RESEARCH 53.5(2017). |
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