A climatology of strong large-scale ocean evaporation events. Part I : Identification, global distribution, and associated climate conditions
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 a...
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American Meteorological Society
2018
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Online Access: | https://lup.lub.lu.se/record/e6857559-bb61-428d-a2d5-33b9e7041a0c https://doi.org/10.1175/JCLI-D-17-0591.1 |
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ftulundlup:oai:lup.lub.lu.se:e6857559-bb61-428d-a2d5-33b9e7041a0c 2023-05-15T17:31:17+02:00 A climatology of strong large-scale ocean evaporation events. Part I : Identification, global distribution, and associated climate conditions Aemisegger, Franziska Papritz, Lukas 2018 https://lup.lub.lu.se/record/e6857559-bb61-428d-a2d5-33b9e7041a0c https://doi.org/10.1175/JCLI-D-17-0591.1 eng eng American Meteorological Society https://lup.lub.lu.se/record/e6857559-bb61-428d-a2d5-33b9e7041a0c http://dx.doi.org/10.1175/JCLI-D-17-0591.1 scopus:85052964198 Journal of Climate; 31(18), pp 7287-7312 (2018) ISSN: 0894-8755 Climate Research Air-sea interaction Evaporation Extratropical cyclones Hydrologic cycle Water vapor contributiontojournal/article info:eu-repo/semantics/article text 2018 ftulundlup https://doi.org/10.1175/JCLI-D-17-0591.1 2023-02-01T23:36:54Z 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. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Sea ice Lund University Publications (LUP) Indian Journal of Climate 31 18 7287 7312 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Climate Research Air-sea interaction Evaporation Extratropical cyclones Hydrologic cycle Water vapor |
spellingShingle |
Climate Research Air-sea interaction Evaporation Extratropical cyclones Hydrologic cycle Water vapor Aemisegger, Franziska Papritz, Lukas A climatology of strong large-scale ocean evaporation events. Part I : Identification, global distribution, and associated climate conditions |
topic_facet |
Climate Research Air-sea interaction Evaporation Extratropical cyclones Hydrologic cycle Water vapor |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Aemisegger, Franziska Papritz, Lukas |
author_facet |
Aemisegger, Franziska Papritz, Lukas |
author_sort |
Aemisegger, Franziska |
title |
A climatology of strong large-scale ocean evaporation events. Part I : Identification, global distribution, and associated climate conditions |
title_short |
A climatology of strong large-scale ocean evaporation events. Part I : Identification, global distribution, and associated climate conditions |
title_full |
A climatology of strong large-scale ocean evaporation events. Part I : Identification, global distribution, and associated climate conditions |
title_fullStr |
A climatology of strong large-scale ocean evaporation events. Part I : Identification, global distribution, and associated climate conditions |
title_full_unstemmed |
A climatology of strong large-scale ocean evaporation events. Part I : Identification, global distribution, and associated climate conditions |
title_sort |
climatology of strong large-scale ocean evaporation events. part i : identification, global distribution, and associated climate conditions |
publisher |
American Meteorological Society |
publishDate |
2018 |
url |
https://lup.lub.lu.se/record/e6857559-bb61-428d-a2d5-33b9e7041a0c https://doi.org/10.1175/JCLI-D-17-0591.1 |
geographic |
Indian |
geographic_facet |
Indian |
genre |
North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
North Atlantic North Atlantic oscillation Sea ice |
op_source |
Journal of Climate; 31(18), pp 7287-7312 (2018) ISSN: 0894-8755 |
op_relation |
https://lup.lub.lu.se/record/e6857559-bb61-428d-a2d5-33b9e7041a0c http://dx.doi.org/10.1175/JCLI-D-17-0591.1 scopus:85052964198 |
op_doi |
https://doi.org/10.1175/JCLI-D-17-0591.1 |
container_title |
Journal of Climate |
container_volume |
31 |
container_issue |
18 |
container_start_page |
7287 |
op_container_end_page |
7312 |
_version_ |
1766128779138170880 |