DOI: 10.1007/s00382-014-2245-y
Scopus记录号: 2-s2.0-84939894091
论文题名: Diurnal precipitation and high cloud frequency variability over the Gulf Stream and over the Kuroshio
作者: Minobe S. ; Takebayashi S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 44, 期: 2017-07-08 起始页码: 2079
结束页码: 2095
语种: 英语
英文关键词: Air–sea interaction
; Climate process
; Mid-latitude
; Observational data analysis
; Scale-interaction
; Western boundary currents
英文摘要: Recent studies show mid-latitude western boundary currents (WBCs) substantially influence the atmosphere aloft, and an important feature is enhanced rain band over the WBCs in climatological mean field. However, how such long-term, climate phenomena are related to shorter, weather timescale phenomena are generally remained to be explored. In this paper, diurnal precipitation and cloud variations are investigated global mid-latitude oceans with emphasis on air–sea interactions over WBCs using satellite-derived precipitation and outgoing longwave radiation (OLR) datasets. Strong 24-h period components of precipitations are found over the Gulf Stream in summer and over the Kuroshio in the East China Sea in early summer (Baiu–Meiyu season), respectively. Similar diurnal precipitations are not observed in WBCs in the Southern Hemisphere year around. The diurnal precipitation cycles over the Gulf Stream and the Kuroshio exhibit peak phases in the early to late morning for the Gulf Stream and late morning to early afternoon for the Kuroshio, with southeastward phase propagations. High cloud frequency derived from OLR data exhibit consistent diurnal cycles. A substantial difference of diurnal cycles between the Gulf Stream and the Kuroshio regions are associated with the large-scale Baiu–Meiyu rain and cloud bands for the latter region. Diurnal precipitation and high cloud variability is found in the vicinity of the Kuroshio itself, embedded in the Baiu–Meiyu rain and cloud bands distributing in a wider area without a strong diurnal component. The spatial and seasonal distributions of the diurnal variability over these WBCs strongly suggests that the diurnal precipitation and cloud cycles are essential aspects of deep heating mode of atmospheric response recently reported for these WBCs. These results indicate that these WBCs in the Northern Hemisphere play an important role in modulating short-term precipitation variations, and on the other hand diurnal variability can be a substantial agent for the mid-latitude air–sea interaction. © 2014, The Author(s). 资助项目: JSPS, Japan Society for the Promotion of Science
; JSPS, Japan Society for the Promotion of Science
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54228
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Natural History Sciences, Graduate School of Science, Hokkaido University, Room 319, Rigaku Building No 8, N10, W8, Kita-ku, Sapporo, Japan
Recommended Citation:
Minobe S.,Takebayashi S.. Diurnal precipitation and high cloud frequency variability over the Gulf Stream and over the Kuroshio[J]. Climate Dynamics,2015-01-01,44(2017-07-08)