DOI: 10.1002/2015GL063506
论文题名: Observations indicative of rain-induced double diffusion in the ocean surface boundary layer
作者: Walesby K. ; Vialard J. ; Minnett P.J. ; Callaghan A.H. ; Ward B.
刊名: Geophysical Research Letters
ISSN: 0094-9222
EISSN: 1944-8953
出版年: 2015
卷: 42, 期: 10 起始页码: 3963
结束页码: 3972
语种: 英语
英文关键词: Air-Sea Interaction Profiler
; double diffusion
; surface ocean boundary layer
Scopus关键词: Boundary layer flow
; Diffusion
; Mixing
; Oceanography
; Precipitation (meteorology)
; Rain
; Air sea interactions
; Double diffusion
; Double diffusive
; Long-term impacts
; Rainfall rates
; Shear instability
; Surface ocean
; Thermohaline staircase
; Boundary layers
; air-sea interaction
; boundary layer
; double diffusion
; instability
; mixing
; precipitation intensity
; sea surface
; sea surface salinity
; thermohaline structure
英文摘要: Double diffusion can result in the formation of thermohaline staircases, typically observed in the ocean interior. The observations presented here were acquired in the ocean surface boundary layer with the autonomous microstructure Air-Sea Interaction Profiler. An intense rain event (rainfall rates of up to 35 mm/h) resulted in cooler, fresher water (up to 0.15 practical salinity unit (psu) over the upper 7-10 m) overlaying warmer, saltier water, a situation potentially conducive to double-diffusive mixing. Although not as crisp as interfaces in the interior ocean because of elevated background mixing, a total of 303 thermohaline interfaces were detected within and at the base of the fresh layer, with mean changes in temperature (T) and salinity (S) across interfaces of 20 × 10-3oC and 22 × 10-3 psu, respectively. These results call for new studies to disambiguate whether such interfaces are formed through double-diffusive mixing or shear instabilities and understand any long-term impacts on near-surface stratification. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84931572762&doi=10.1002%2f2015GL063506&partnerID=40&md5=cd12046c3dcbc6ad955caff7a81d8eb8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8838
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: AirSea Laboratory, School of Physics, National University of Ireland, Galway, Ireland
Recommended Citation:
Walesby K.,Vialard J.,Minnett P.J.,et al. Observations indicative of rain-induced double diffusion in the ocean surface boundary layer[J]. Geophysical Research Letters,2015-01-01,42(10).