Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0355.1 |
Radiative Invigoration of Tropical Convection by Preceding Cirrus Clouds | |
Masunaga, Hirohiko1; Bony, Sandrine2 | |
2018-04-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2018 |
卷号 | 75期号:4页码:1327-1342 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; France |
英文摘要 | This work seeks evidence for convective-radiative interactions in satellite measurements, with a focus on the variability over the life cycle of tropical convection in search of the underlying processes at a fundamental level of the convective dynamics. To this end, the vertical profiles of cloud cover and radiative heating from the CloudSat-CALIPSO products are sorted into a composite time series around the hour of convective occurrence identified by the TRMM PR. The findings are summarized as follows. Cirrus cloud cover begins to increase, accompanied by a notable reduction of longwave cooling, in moist atmospheres even 1-2 days before deep convection is invigorated. In contrast, longwave cooling stays efficient and clouds remain shallow where the ambient air is very dry. To separate the radiative effects by the preceding cirrus clouds on convection from the direct effects of moisture, the observations with enhanced cirrus cover are isolated from those with suppressed cirrus under a moisture environment being nearly equal. It is found that rain rate is distinctly higher if the upper troposphere is cloudier regardless of moisture, suggesting that the cirrus radiative effects may be linked with the subsequent growth of convection. A possible mechanism to support this observational implication is discussed using a simple conceptual model. The model suggests that the preceding cirrus clouds could radiatively promote the moistening with the aid of the congestus-mode dynamics within a short period of time (about 2 days) as observed. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430749000018 |
WOS关键词 | GENERAL-CIRCULATION MODEL ; STATIC ENERGY BUDGET ; TOGA-COARE ; SELF-AGGREGATION ; WESTERN PACIFIC ; LIFE-CYCLE ; INTRASEASONAL OSCILLATION ; DIURNAL-VARIATION ; TOP HEIGHT ; WARM POOL |
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/29784 |
专题 | 地球科学 |
作者单位 | 1.Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan; 2.Univ Paris 06, Sorbonne Univ, CNRS, LMD IPSL, Paris, France |
推荐引用方式 GB/T 7714 | Masunaga, Hirohiko,Bony, Sandrine. Radiative Invigoration of Tropical Convection by Preceding Cirrus Clouds[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2018,75(4):1327-1342. |
APA | Masunaga, Hirohiko,&Bony, Sandrine.(2018).Radiative Invigoration of Tropical Convection by Preceding Cirrus Clouds.JOURNAL OF THE ATMOSPHERIC SCIENCES,75(4),1327-1342. |
MLA | Masunaga, Hirohiko,et al."Radiative Invigoration of Tropical Convection by Preceding Cirrus Clouds".JOURNAL OF THE ATMOSPHERIC SCIENCES 75.4(2018):1327-1342. |
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