Role of Surface Gravity Waves in Aquaplanet Ocean Climates
| Autor: | Sergey Gulev, Margarita Markina, Joshua Studholme |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Mixed layer
Biogeosciences Oceanography Volcanic Effects Physics - Geophysics Global Change from Geodesy Volcanic Hazards and Risks Oceans Sea Level Change Disaster Risk Analysis and Assessment Earth and Planetary Astrophysics (astro-ph.EP) Global and Planetary Change Climate and Interannual Variability Physics - Fluid Dynamics Climate Impact Earthquake Ground Motions and Engineering Seismology Explosive Volcanism Earth System Modeling Upper Ocean and Mixed Layer Processes Atmospheric Processes Ocean Monitoring with Geodetic Techniques Ocean/Atmosphere Interactions Atmospheric Regional Modeling Atmospheric Effects Physical geography Buoyancy Volcanology Hydrological Cycles and Budgets Decadal Ocean Variability Land/Atmosphere Interactions Geodesy and Gravity Global Change Air/Sea Interactions Numerical Modeling Solid Earth Geological Ocean/Earth/atmosphere/hydrosphere/cryosphere interactions Advection Water Cycles Modeling Fluid Dynamics (physics.flu-dyn) Avalanches Volcano Seismology Benefit‐cost Analysis Atmospheric and Oceanic Physics (physics.ao-ph) Thermohaline circulation Computational Geophysics Regional Climate Change Natural Hazards Abrupt/Rapid Climate Change Informatics Surface Waves and Tides Atmospheric Composition and Structure Atmospheric sciences Volcano Monitoring Seismology Climatology Radio Oceanography Gravity and Isostasy Marine Geology and Geophysics Jet stream Physical Modeling GB3-5030 Physics - Atmospheric and Oceanic Physics Oceanography: General Middle latitudes Cryosphere Impacts of Global Change Geology Oceanography: Physical Research Article Langmuir circulation Risk Pycnocline Oceanic Theoretical Modeling FOS: Physical sciences GC1-1581 engineering.material Radio Science Tsunamis and Storm Surges Paleoceanography Climate Dynamics Environmental Chemistry Numerical Solutions Climate Change and Variability Effusive Volcanism Climate Variability General Circulation Policy Sciences Climate Impacts Mud Volcanism Geophysics (physics.geo-ph) Air/Sea Constituent Fluxes Mass Balance Ocean influence of Earth rotation Volcano/Climate Interactions engineering General Earth and Planetary Sciences Hydrology Sea Level: Variations and Mean Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Journal of Advances in Modeling Earth Systems, Vol 13, Iss 6, Pp n/a-n/a (2021) Journal of Advances in Modeling Earth Systems |
| DOI: | 10.48550/arxiv.2106.05032 |
| Popis: | 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. Key Points Idealized oceanic climates forced by ranging atmospheric regimes following equator‐to‐pole thermal gradient perturbations are investigatedWind‐forced surface gravity waves deepen the mixed layer, increase mixed layer vertical momentum diffusivity and dampen surface currentsThe consistency of the effects of waves on ocean dynamics and stratification across cooler/warmer aquaplanet climates is examined |
| Databáze: | OpenAIRE |
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