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Warm-Air Advection Over Melting Sea-Ice: A Lagrangian Case Study
SMHI, Atmosfärisk fjärranalys.ORCID iD: 0000-0002-6717-8343
Responsible organisation
2020 (English)In: Boundary-layer Meteorology, ISSN 0006-8314, E-ISSN 1573-1472Article in journal (Refereed) Published
Abstract [en]

Observations from the 2014 Arctic Clouds in Summer Experiment indicate that, in summer, warm-air advection over melting sea-ice results in a strong surface melting feedback forced by a very strong surface-based temperature inversion and fog formation exerting additional heat flux on the surface. Here, we analyze this case further using a combination of reanalysis dataset and satellite products in a Lagrangian framework, thereby extending the view spatially from the local icebreaker observations into a Langrangian perspective. The results confirm that warm-air advection induces a positive net surface-energy-budget anomaly, exerting positive longwave radiation and turbulent heat flux on the surface. Additionally, as warm and moist air penetrates farther into the Arctic, cloud-top cooling and surface mixing eventually erode the surface inversion downstream. The initial surface inversion splits into two elevated inversions while the air columns below the elevated inversions transform into well-mixed layers.

Place, publisher, year, edition, pages
2020.
National Category
Meteorology and Atmospheric Sciences
Research subject
Remote sensing; SWEDARCTIC 2014, SWERUS-C3
Identifiers
URN: urn:nbn:se:polar:diva-8546DOI: 10.1007/s10546-020-00590-1ISI: 000599789500001OAI: oai:DiVA.org:polar-8546DiVA, id: diva2:1517613
Available from: 2021-01-14 Created: 2021-01-14 Last updated: 2021-01-14

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Devasthale, Abhay
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