Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL090746 |
Reducing Surface Wetness Leads to Tropical Hydrological Cycle Regime Transition | |
Bowen Fan; Zhihong Tan; Tiffany A. Shaw; Edwin S. Kite | |
2021-04-11 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Earth's modern climate is characterized by wet, rainy deep tropics, however paleoclimate and planetary science have revealed a wide range of hydrological cycle regimes connected to different external parameters. Here we investigate how surface wetness affects the tropical hydrological cycle. When surface wetness is decreased in an Earth‐like general circulation model, the tropics remain wet but transition from a rainy to rain‐free regime. The rain‐free regime occurs when surface precipitation is suppressed as negative evaporation (surface condensation) balances moisture flux convergence. The regime transition is dominated by near‐surface relative humidity changes in contrast to the hypothesis that relative humidity changes are small. We show near‐surface relative humidity changes responsible for the regime transition are controlled by re‐evaporation of stratiform precipitation near the lifting condensation level. Re‐evaporation impacts the near‐surface through vertical mixing. Our results reveal a new rain‐free tropical hydrological cycle regime that goes beyond the wet/dry paradigm. |
领域 | 气候变化 |
URL | 查看原文 |
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/322018 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Bowen Fan,Zhihong Tan,Tiffany A. Shaw,et al. Reducing Surface Wetness Leads to Tropical Hydrological Cycle Regime Transition[J]. Geophysical Research Letters,2021. |
APA | Bowen Fan,Zhihong Tan,Tiffany A. Shaw,&Edwin S. Kite.(2021).Reducing Surface Wetness Leads to Tropical Hydrological Cycle Regime Transition.Geophysical Research Letters. |
MLA | Bowen Fan,et al."Reducing Surface Wetness Leads to Tropical Hydrological Cycle Regime Transition".Geophysical Research Letters (2021). |
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