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Record Details

Record 27 of 196
Modeling deep convection in the Greenland Sea
Author and Affiliation:
Hakkinen, S.(NASA Goddard Space Flight Center, Greenbelt, MD)
Mellor, G. L.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Kantha, L. H.(Princeton University, NJ, United States)
Abstract: The development of deep convective events in the high-latitude ocean is studied using a three-dimensional, coupled ice-ocean model. Oceanic mixing is described according to the level 2.5 turbulence closure scheme in which convection occurs in a continuous way, i.e., convective adjustment is not invoked. The model is forced by strong winds and surface cooling. Strong upwelling at the multilyear ice edge and consequent entrainment of warm Atlantic waters into the mixed layer is produced by winds parallel to the ice edge. Concomitant cooling drives deep convection and produces chimneylike structures. Inclusion of a barotropic mean flow over topography to the model provides important preconditioning and selects the location of deep convection. The most efficient preconditioning occurs at locations where the flow ascends a slope. In a stratified environment similar to the Greenland Sea with a 12 m/s wind the model simulations show that localized deep convection takes place after about 10 days to depths of 1000 m.
Publication Date: Apr 15, 1992
Document ID:
19920051544
(Acquired Nov 22, 1995)
Accession Number: 92A34168
Subject Category: OCEANOGRAPHY
Document Type: Journal Article
Publication Information: Journal of Geophysical Research (ISSN 0148-0227); 97; C4, A; 5389-540
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 20p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: CONVECTION; OCEAN MODELS; POLAR REGIONS; SEA ICE; SEA WATER; GREENLAND; LIQUID-SOLID INTERFACES; SURFACE COOLING; WIND VELOCITY
Imprint And Other Notes: Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. C4, April 15, 1992, p. 5389-5408. Research supported by U.S. Navy.
Miscellaneous Notes: Research supported by U.S. Na
Availability Source: Other Sources
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