Atmospheric rivers contribute to summer surface buoyancy forcing in the atlantic sector of the southern ocean

Edholm, JMSwart, SPlessis, Marcel DNicholson, Sarah-Anne2023-04-112023-04-112022-08Edholm, J., Swart, S., Plessis, M.D. & Nicholson, S. 2022. Atmospheric rivers contribute to summer surface buoyancy forcing in the atlantic sector of the southern ocean. Geophysical Research Letters, 49(17). http://hdl.handle.net/10204/127420094-82761944-8007https://doi.org/10.1029/2022GL100149http://hdl.handle.net/10204/12742Atmospheric rivers (ARs) dominate moisture transport globally; however, it is unknown what impact ARs have on surface ocean buoyancy. This study explores the surface buoyancy gained by ARs using high-resolution surface observations from a Wave Glider deployed in the subpolar Southern Ocean (54°S, 0°E) between 19 December 2018 and 12 February 2019 (55 days). When ARs combine with storms, the associated precipitation is significantly enhanced (189%). In addition, the daily accumulation of AR-induced precipitation provides a buoyancy gain to the surface ocean equivalent to warming by surface heat fluxes. Over the 55 days, ARs accounted for 47% of the total precipitation equating to 10% of the summer surface ocean buoyancy gain. This study indicates that ARs play an important role in the summer precipitation over the subpolar Southern Ocean and that they can alter the upper-ocean buoyancy budget from synoptic to seasonal timescales.FulltextenAtmospheric riversRainfall eventsSouthern OceanSurface heat fluxAtmospheric rivers contribute to summer surface buoyancy forcing in the atlantic sector of the southern oceanArticleEdholm, J., Swart, S., Plessis, M. D., & Nicholson, S. (2022). Atmospheric rivers contribute to summer surface buoyancy forcing in the atlantic sector of the southern ocean. Geophysical Research Letters, 49(17), http://hdl.handle.net/10204/12742Edholm, JM, S Swart, Marcel D Plessis, and Sarah-Anne Nicholson "Atmospheric rivers contribute to summer surface buoyancy forcing in the atlantic sector of the southern ocean." Geophysical Research Letters, 49(17) (2022) http://hdl.handle.net/10204/12742Edholm J, Swart S, Plessis MD, Nicholson S. Atmospheric rivers contribute to summer surface buoyancy forcing in the atlantic sector of the southern ocean. Geophysical Research Letters, 49(17). 2022; http://hdl.handle.net/10204/12742.TY - Article AU - Edholm, JM AU - Swart, S AU - Plessis, Marcel D AU - Nicholson, Sarah-Anne AB - Atmospheric rivers (ARs) dominate moisture transport globally; however, it is unknown what impact ARs have on surface ocean buoyancy. This study explores the surface buoyancy gained by ARs using high-resolution surface observations from a Wave Glider deployed in the subpolar Southern Ocean (54°S, 0°E) between 19 December 2018 and 12 February 2019 (55 days). When ARs combine with storms, the associated precipitation is significantly enhanced (189%). In addition, the daily accumulation of AR-induced precipitation provides a buoyancy gain to the surface ocean equivalent to warming by surface heat fluxes. Over the 55 days, ARs accounted for 47% of the total precipitation equating to 10% of the summer surface ocean buoyancy gain. This study indicates that ARs play an important role in the summer precipitation over the subpolar Southern Ocean and that they can alter the upper-ocean buoyancy budget from synoptic to seasonal timescales. DA - 2022-08 DB - ResearchSpace DP - CSIR J1 - Geophysical Research Letters, 49(17) KW - Atmospheric rivers KW - Rainfall events KW - Southern Ocean KW - Surface heat flux LK - https://researchspace.csir.co.za PY - 2022 SM - 0094-8276 SM - 1944-8007 T1 - Atmospheric rivers contribute to summer surface buoyancy forcing in the atlantic sector of the southern ocean TI - Atmospheric rivers contribute to summer surface buoyancy forcing in the atlantic sector of the southern ocean UR - http://hdl.handle.net/10204/12742 ER -26536