The Role of the Southern Ocean/Sea Ice Interaction in Global Climate Change
The seasonal sea ice field of the Southern Ocean strongly modulates climate through its insulating effect and high albedo. Consequently, it plays a significant role in global climate and must be adequately parameterized for inclusion in large-scale circulation models attempting to predict the nature...
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ftdtic:ADP007298 2023-05-15T16:37:30+02:00 The Role of the Southern Ocean/Sea Ice Interaction in Global Climate Change Martinson, Douglas G. LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES NY 1992-03 text/html http://www.dtic.mil/docs/citations/ADP007298 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP007298 en eng http://www.dtic.mil/docs/citations/ADP007298 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Meteorology Snow Ice and Permafrost Physical and Dynamic Oceanography *CLIMATE *SEA ICE *PHYSICAL PROPERTIES *ENVIRONMENTAL IMPACT ALBEDO ATMOSPHERICS CIRCULATION COOLING DEEP WATER GLOBAL ICE INCLUSIONS INTERACTIONS MODELS MONITORING PARAMETERS SALTS SCALE MODELS STABILITY STATIC STABILITY VARIABLES VENTILATION GREENHOUSE EFFECT SOUTHERN HEMISPHERE *Global climate effects Component Reports *Southern Oceans Text 1992 ftdtic 2016-02-19T17:39:24Z The seasonal sea ice field of the Southern Ocean strongly modulates climate through its insulating effect and high albedo. Consequently, it plays a significant role in global climate and must be adequately parameterized for inclusion in large-scale circulation models attempting to predict the nature of global change. Recent field studies and modeling work show that the ice field is highly sensitive to the static stability and vertical fluxes in the Southern Ocean water column. Given the marginal stability and strong fluxes of the present-day water column, relatively small changes in the ocean/atmosphere may lead to significant changes in the stability or fluxes and thus the nature of the sea ice cover. These interactions link the local- and regional-scale processes to the global-scale processes, forming a Southern Ocean/climate feedback loop. The local-scale processes operate at sub-grid scales in most climate models; therefore the results of a local process-oriented model are reviewed to examine the nature of the local-regional interactions which are critical to this system. The model scalings, which describe the system parameter dependence, indicate the direction and magnitude of change of the key external parameters which will drive the system toward a more stable or more unstable state. They also allow a computationally efficient means of monitoring the key elements of the ocean/sea ice system in large-scale models. The main external parameters include: (1) depth of the pycnocline; (2) ratio of heat to salt through the pycnocline; (3) strength of the pycnocline; and (4) magnitude of atmospheric cooling. The divergence of the ice field also plays an important role. This article is from 'Proceedings of the International Conference on the Role of the Polar Regions in Global Change Held in Fairbanks, Alaska on 11-15 June 1990. Volume 1', AD-A253 027, p269-274. See also Volume 2, AD-A253 028. Text Ice permafrost Sea ice Southern Ocean Alaska Defense Technical Information Center: DTIC Technical Reports database Fairbanks Southern Ocean |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Meteorology Snow Ice and Permafrost Physical and Dynamic Oceanography *CLIMATE *SEA ICE *PHYSICAL PROPERTIES *ENVIRONMENTAL IMPACT ALBEDO ATMOSPHERICS CIRCULATION COOLING DEEP WATER GLOBAL ICE INCLUSIONS INTERACTIONS MODELS MONITORING PARAMETERS SALTS SCALE MODELS STABILITY STATIC STABILITY VARIABLES VENTILATION GREENHOUSE EFFECT SOUTHERN HEMISPHERE *Global climate effects Component Reports *Southern Oceans |
spellingShingle |
Meteorology Snow Ice and Permafrost Physical and Dynamic Oceanography *CLIMATE *SEA ICE *PHYSICAL PROPERTIES *ENVIRONMENTAL IMPACT ALBEDO ATMOSPHERICS CIRCULATION COOLING DEEP WATER GLOBAL ICE INCLUSIONS INTERACTIONS MODELS MONITORING PARAMETERS SALTS SCALE MODELS STABILITY STATIC STABILITY VARIABLES VENTILATION GREENHOUSE EFFECT SOUTHERN HEMISPHERE *Global climate effects Component Reports *Southern Oceans Martinson, Douglas G. The Role of the Southern Ocean/Sea Ice Interaction in Global Climate Change |
topic_facet |
Meteorology Snow Ice and Permafrost Physical and Dynamic Oceanography *CLIMATE *SEA ICE *PHYSICAL PROPERTIES *ENVIRONMENTAL IMPACT ALBEDO ATMOSPHERICS CIRCULATION COOLING DEEP WATER GLOBAL ICE INCLUSIONS INTERACTIONS MODELS MONITORING PARAMETERS SALTS SCALE MODELS STABILITY STATIC STABILITY VARIABLES VENTILATION GREENHOUSE EFFECT SOUTHERN HEMISPHERE *Global climate effects Component Reports *Southern Oceans |
description |
The seasonal sea ice field of the Southern Ocean strongly modulates climate through its insulating effect and high albedo. Consequently, it plays a significant role in global climate and must be adequately parameterized for inclusion in large-scale circulation models attempting to predict the nature of global change. Recent field studies and modeling work show that the ice field is highly sensitive to the static stability and vertical fluxes in the Southern Ocean water column. Given the marginal stability and strong fluxes of the present-day water column, relatively small changes in the ocean/atmosphere may lead to significant changes in the stability or fluxes and thus the nature of the sea ice cover. These interactions link the local- and regional-scale processes to the global-scale processes, forming a Southern Ocean/climate feedback loop. The local-scale processes operate at sub-grid scales in most climate models; therefore the results of a local process-oriented model are reviewed to examine the nature of the local-regional interactions which are critical to this system. The model scalings, which describe the system parameter dependence, indicate the direction and magnitude of change of the key external parameters which will drive the system toward a more stable or more unstable state. They also allow a computationally efficient means of monitoring the key elements of the ocean/sea ice system in large-scale models. The main external parameters include: (1) depth of the pycnocline; (2) ratio of heat to salt through the pycnocline; (3) strength of the pycnocline; and (4) magnitude of atmospheric cooling. The divergence of the ice field also plays an important role. This article is from 'Proceedings of the International Conference on the Role of the Polar Regions in Global Change Held in Fairbanks, Alaska on 11-15 June 1990. Volume 1', AD-A253 027, p269-274. See also Volume 2, AD-A253 028. |
author2 |
LAMONT-DOHERTY GEOLOGICAL OBSERVATORY PALISADES NY |
format |
Text |
author |
Martinson, Douglas G. |
author_facet |
Martinson, Douglas G. |
author_sort |
Martinson, Douglas G. |
title |
The Role of the Southern Ocean/Sea Ice Interaction in Global Climate Change |
title_short |
The Role of the Southern Ocean/Sea Ice Interaction in Global Climate Change |
title_full |
The Role of the Southern Ocean/Sea Ice Interaction in Global Climate Change |
title_fullStr |
The Role of the Southern Ocean/Sea Ice Interaction in Global Climate Change |
title_full_unstemmed |
The Role of the Southern Ocean/Sea Ice Interaction in Global Climate Change |
title_sort |
role of the southern ocean/sea ice interaction in global climate change |
publishDate |
1992 |
url |
http://www.dtic.mil/docs/citations/ADP007298 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP007298 |
geographic |
Fairbanks Southern Ocean |
geographic_facet |
Fairbanks Southern Ocean |
genre |
Ice permafrost Sea ice Southern Ocean Alaska |
genre_facet |
Ice permafrost Sea ice Southern Ocean Alaska |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADP007298 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766027789529513984 |