Role of Surface Gravity Waves in Aquaplanet Ocean Climates
Abstract We present a set of idealized numerical experiments of a solstitial aquaplanet ocean and examine the thermodynamic and dynamic implications of surface gravity waves (SGWs) upon its mean state. The aquaplanet's oceanic circulation is dominated by an equatorial zonal jet and four Ekman d...
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American Geophysical Union (AGU)
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ftdoajarticles:oai:doaj.org/article:13cc4d63fa5748ad80a45160da1875bd 2023-05-15T18:25:38+02:00 Role of Surface Gravity Waves in Aquaplanet Ocean Climates Joshua H. P. Studholme Margarita Y. Markina Sergey K. Gulev 2021-06-01T00:00:00Z https://doi.org/10.1029/2020MS002202 https://doaj.org/article/13cc4d63fa5748ad80a45160da1875bd EN eng American Geophysical Union (AGU) https://doi.org/10.1029/2020MS002202 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2020MS002202 https://doaj.org/article/13cc4d63fa5748ad80a45160da1875bd Journal of Advances in Modeling Earth Systems, Vol 13, Iss 6, Pp n/a-n/a (2021) Physical geography GB3-5030 Oceanography GC1-1581 article 2021 ftdoajarticles https://doi.org/10.1029/2020MS002202 2022-12-31T04:28:07Z Abstract We present a set of idealized numerical experiments of a solstitial aquaplanet ocean and examine the thermodynamic and dynamic implications of surface gravity waves (SGWs) upon its mean state. The aquaplanet's oceanic circulation is dominated by an equatorial zonal jet and four Ekman driven meridional overturning circulation (MOC) cells aligned with the westerly atmospheric jet streams and easterly trade winds in both hemispheres. Including SGW parameterization (representing modulations of air‐sea momentum fluxes, Langmuir circulation, and Stokes‐Coriolis force) increases mixed layer vertical momentum diffusivity by ∼40% and dampens surface momentum fluxes by ∼4%. The correspondingly dampened MOC impacts the oceanic density structure to 1 km depth by lessening the large‐scale advective transports of heat and salt, freshening the equatorial latitudes (where evaporation minus precipitation [E − P] is negative) and increasing salinity in the subtropics (where E − P is positive) by ∼1%. The midlatitude pycnocline in both hemispheres is deepened by the inclusion of SGWs. Including SGWs into the aquaplanet ocean model acts to increase mixed layer depth by ∼10% (up to 20% in the wintertime in midlatitudes), decrease vertical shear in the upper 200 m and alter local midlatitude buoyancy frequency. Generally, the impacts of SGWs upon the aquaplanet ocean are found to be consistent across cooler and warmer climates. We suggest that the implications of these simulations could be relevant to understanding future projections of SGW climate, exoplanetary oceans, and the dynamics of the Southern Ocean mixed layer. Article in Journal/Newspaper Southern Ocean Directory of Open Access Journals: DOAJ Articles Southern Ocean Langmuir ENVELOPE(-67.150,-67.150,-66.967,-66.967) Journal of Advances in Modeling Earth Systems 13 6 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Physical geography GB3-5030 Oceanography GC1-1581 |
spellingShingle |
Physical geography GB3-5030 Oceanography GC1-1581 Joshua H. P. Studholme Margarita Y. Markina Sergey K. Gulev Role of Surface Gravity Waves in Aquaplanet Ocean Climates |
topic_facet |
Physical geography GB3-5030 Oceanography GC1-1581 |
description |
Abstract We present a set of idealized numerical experiments of a solstitial aquaplanet ocean and examine the thermodynamic and dynamic implications of surface gravity waves (SGWs) upon its mean state. The aquaplanet's oceanic circulation is dominated by an equatorial zonal jet and four Ekman driven meridional overturning circulation (MOC) cells aligned with the westerly atmospheric jet streams and easterly trade winds in both hemispheres. Including SGW parameterization (representing modulations of air‐sea momentum fluxes, Langmuir circulation, and Stokes‐Coriolis force) increases mixed layer vertical momentum diffusivity by ∼40% and dampens surface momentum fluxes by ∼4%. The correspondingly dampened MOC impacts the oceanic density structure to 1 km depth by lessening the large‐scale advective transports of heat and salt, freshening the equatorial latitudes (where evaporation minus precipitation [E − P] is negative) and increasing salinity in the subtropics (where E − P is positive) by ∼1%. The midlatitude pycnocline in both hemispheres is deepened by the inclusion of SGWs. Including SGWs into the aquaplanet ocean model acts to increase mixed layer depth by ∼10% (up to 20% in the wintertime in midlatitudes), decrease vertical shear in the upper 200 m and alter local midlatitude buoyancy frequency. Generally, the impacts of SGWs upon the aquaplanet ocean are found to be consistent across cooler and warmer climates. We suggest that the implications of these simulations could be relevant to understanding future projections of SGW climate, exoplanetary oceans, and the dynamics of the Southern Ocean mixed layer. |
format |
Article in Journal/Newspaper |
author |
Joshua H. P. Studholme Margarita Y. Markina Sergey K. Gulev |
author_facet |
Joshua H. P. Studholme Margarita Y. Markina Sergey K. Gulev |
author_sort |
Joshua H. P. Studholme |
title |
Role of Surface Gravity Waves in Aquaplanet Ocean Climates |
title_short |
Role of Surface Gravity Waves in Aquaplanet Ocean Climates |
title_full |
Role of Surface Gravity Waves in Aquaplanet Ocean Climates |
title_fullStr |
Role of Surface Gravity Waves in Aquaplanet Ocean Climates |
title_full_unstemmed |
Role of Surface Gravity Waves in Aquaplanet Ocean Climates |
title_sort |
role of surface gravity waves in aquaplanet ocean climates |
publisher |
American Geophysical Union (AGU) |
publishDate |
2021 |
url |
https://doi.org/10.1029/2020MS002202 https://doaj.org/article/13cc4d63fa5748ad80a45160da1875bd |
long_lat |
ENVELOPE(-67.150,-67.150,-66.967,-66.967) |
geographic |
Southern Ocean Langmuir |
geographic_facet |
Southern Ocean Langmuir |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Journal of Advances in Modeling Earth Systems, Vol 13, Iss 6, Pp n/a-n/a (2021) |
op_relation |
https://doi.org/10.1029/2020MS002202 https://doaj.org/toc/1942-2466 1942-2466 doi:10.1029/2020MS002202 https://doaj.org/article/13cc4d63fa5748ad80a45160da1875bd |
op_doi |
https://doi.org/10.1029/2020MS002202 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
13 |
container_issue |
6 |
_version_ |
1766207205071126528 |