Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018JD029750 |
Does Soil Moisture Have an Influence on Near-Surface Temperature? | |
Liu, Junkai; Pu, Zhaoxia | |
2019-06-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2019 |
卷号 | 124期号:12页码:6444-6466 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The relationship between soil moisture (SM) and temperature at 2-m height (T2) is examined with long-term meteorological and soil observations and a single-column model. With the information flow (IF) and correlation analysis methods, results show that the distribution of SM depends on land use and land cover, while an increase in vegetation fraction corresponds to an increase in SM, and this dependence decreases with soil depth. There is causality between T2 and SM at all soil levels. Compared with those in deeper soil, higher IF values and correlations appear in the top soil levels, implying a stronger interaction between the top soil layer and the atmosphere. Meanwhile, most correlation coefficient values rank weak or moderate, and negative feedback is predominant with low IF values, indicating that the causality between them is relatively weak and also proving that SM is not the sole factor that influences changes of near-surface temperature. The single-column model demonstrates that an increase (decrease) in SM will result in cooler (warmer) T2 through the redistribution of surface heat flux, while changes in SM in the top soil layers have a stronger influence on T2 compared to those in deep soil layers. The duration of the atmospheric temperature inversion layer is also prolonged (reduced) with an increase (decrease) in SM. Impacts of SM on T2 vary with land use or vegetation fraction and also are more significant in warm months and the daytime than in cold months and nighttime. Moreover, large-scale and local circulations have steady influences on T2 in different weather conditions. |
英文关键词 | soil moisture near-surface temperature atmospheric boundary layer |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477800000033 |
WOS关键词 | BACKGROUND ERROR COVARIANCE ; SINGLE-COLUMN MODEL ; FILTER ASSIMILATION ; WRF ; SENSITIVITY ; FORECASTS ; SIMULATIONS ; WEATHER ; SYSTEM ; WIND |
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/184186 |
专题 | 气候变化 |
作者单位 | Univ Utah, Dept Atmospher Sci, Salt Lake City, UT 84112 USA |
推荐引用方式 GB/T 7714 | Liu, Junkai,Pu, Zhaoxia. Does Soil Moisture Have an Influence on Near-Surface Temperature?[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(12):6444-6466. |
APA | Liu, Junkai,&Pu, Zhaoxia.(2019).Does Soil Moisture Have an Influence on Near-Surface Temperature?.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(12),6444-6466. |
MLA | Liu, Junkai,et al."Does Soil Moisture Have an Influence on Near-Surface Temperature?".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.12(2019):6444-6466. |
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