DOI: 10.1175/JCLI-D-17-0591.1
Scopus记录号: 2-s2.0-85052964198
论文题名: A climatology of strong large-scale ocean evaporation events. Part I: Identification, global distribution, and associated climate conditions
作者: Aemisegger F. ; Papritz L.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2018
卷: 31, 期: 18 起始页码: 7287
结束页码: 7312
语种: 英语
英文关键词: Air-sea interaction
; Evaporation
; Extratropical cyclones
; Hydrologic cycle
; Water vapor
Scopus关键词: Atmospheric humidity
; Atmospheric pressure
; Climate change
; Evaporation
; Sea ice
; Storms
; Water vapor
; Air sea interactions
; Extratropical cyclones
; Hydrologic cycles
; Identification procedure
; Interannual variability
; North Atlantic oscillations
; Spatiotemporal variability
; Western boundary currents
; Ocean currents
英文摘要: This paper presents an object-based, global climatology (1979-2014) of strong large-scale ocean evaporation (SLOE) and its associated climatic properties. SLOE is diagnosed using an ''atmospheric moisture uptake efficiency'' criterion related to the ratio of surface evaporation and integrated water vapor content in the near-surface atmosphere. The chosen Eulerian identification procedure focuses on events that strongly contribute to the available near-surface atmospheric humidity. SLOE is particularly frequent along the warm ocean western boundary currents, downstream of large continental areas, and at the sea ice edge in polar regions with frequent cold-air outbreaks. Furthermore, wind-driven SLOE occurs in regions with topographically enforced winds. On a global annual average, SLOE occurs only 6% of the time but explains 22% of total ocean evaporation. An analysis of the past history and fate of air parcels involved in cold season SLOE in the North Atlantic and south Indian Oceans shows that cold-air advection is the main mechanism that induces these events. Extratropical cyclones thereby play an important role in setting the necessary equatorward synoptic flow. Consequently, the interannual variability of SLOE associated with the North Atlantic Oscillation and the southern annular mode reveals a very high sensitivity of SLOE with respect to the location of the storm tracks. This study highlights the strong link between transient synoptic events and the spatiotemporal variability in ocean evaporation patterns, which cannot be deduced from thermodynamic steadystate and climate mean state considerations alone. © 2018 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110695
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Centre for Environmental and Climate Research, Lund University, Lund, Sweden; Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland; Geophysical Institute, University of Bergen, Bjerknes Centre for Climate Research, Bergen, Norway
Recommended Citation:
Aemisegger F.,Papritz L.. A climatology of strong large-scale ocean evaporation events. Part I: Identification, global distribution, and associated climate conditions[J]. Journal of Climate,2018-01-01,31(18)