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DOI | 10.1007/s00382-016-3144-1 |
The impact of an extreme case of irrigation on the southeastern United States climate | |
Selman, Christopher1,2; Misra, Vasubandhu1,2,3 | |
2017-02-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2017 |
卷号 | 48 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The impacts of irrigation on southeast United States diurnal climate are investigated using simulations from a regional climate model. An extreme case is assumed, wherein irrigation is set to 100 % of field capacity over the growing season of May through October. Irrigation is applied to the root zone layers of 10-40 and 40-100 cm soil layers only. It is found that in this regime there is a pronounced decrease in monthly averaged temperatures in irrigated regions across all months. In non-irrigated areas a slight warming is simulated. Diurnal maximum temperatures in irrigated areas warm, while diurnal minimum temperatures cool. The daytime warming is attributed to an increase in shortwave flux at the surface owing to diminished low cloud cover. Nighttime and daily mean cooling result as a consequence repartitioning of energy into latent heat flux over sensible heat flux, and of a higher net downward ground heat flux. Excess heat is transported into the deep soil layer, preventing a rapidly intensifying positive feedback loop. Both diurnal and monthly average precipitations are reduced over irrigated areas at a magnitude and spatial pattern similar to one another. Due to the excess moisture availability, evaporation is seen to increase, but this is nearly balanced by a corresponding reduction in sensible heat flux. Concomitant with additional moisture availability is an increase in both transient and stationary moisture flux convergences. However, despite the increase, there is a large-scale stabilization of the atmosphere stemming from a cooled surface. |
英文关键词 | Regional climate modeling Irrigation Diurnal climatology Diurnal Southeast United States Southeast US Regional model Agriculture Anthropogenic influences Anthropogenic Climate Climate change Regional Impact Southeast Model Parametrization |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000394150500034 |
WOS关键词 | RAINFALL VARIABILITY ; SURFACE CLIMATE ; DIURNAL CYCLE ; WARM-SEASON ; PRECIPITATION ; MODEL ; SIMULATIONS ; SENSITIVITY ; REANALYSIS ; RESOLUTION |
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/36145 |
专题 | 气候变化 |
作者单位 | 1.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA; 2.Florida State Univ, Ctr Ocean Atmospher Predict Studies, Tallahassee, FL 32306 USA; 3.Florida State Univ, Florida Climate Inst, Tallahassee, FL 32306 USA |
推荐引用方式 GB/T 7714 | Selman, Christopher,Misra, Vasubandhu. The impact of an extreme case of irrigation on the southeastern United States climate[J]. CLIMATE DYNAMICS,2017,48. |
APA | Selman, Christopher,&Misra, Vasubandhu.(2017).The impact of an extreme case of irrigation on the southeastern United States climate.CLIMATE DYNAMICS,48. |
MLA | Selman, Christopher,et al."The impact of an extreme case of irrigation on the southeastern United States climate".CLIMATE DYNAMICS 48(2017). |
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