Return to CIG

Search

View All Publications

Go To Publication by Year:

View Publications by Topic:

Adaptation

Agriculture

Air Quality

Aquatic Ecosystems and Fisheries

Background Papers

Climate: Atmospheric Modeling

Climate: Coupled Atmosphere-Ocean Modeling

Climate: Diagnostics

Climate: Global Climate

Climate: Ocean Modeling

Climate: PNW Climate

Climate: Regional Climate Modeling

Coastal Ecosystems

Coastal Environments

Conservation Biology

Data Analysis and Sharing

Energy

Fact Sheets

Forecasts and Applications

Forest Ecosystems

Human Health

Hydrology and Water Resources

Infrastructure

Integrated Assessment

Ocean Acidification

Oceanography

Program Documents

Science Advisory Reports

Societal Dimensions

Special Reports

Theses and Dissertations

View Publications by Author:

Search the Publication Abstracts:


Other CSES Links:

About CSES

CSES Personnel

Data / Links

Publications

Welcome to the publications directory for the Climate Impacts Group and the Climate Dynamics Group. Please contact the web administrator for assistance with any of these publications.


View: Abstract

The role of daily surface forcing in setting the temperature and mixed layer structure of the Southern Ocean

Kamenkovich, I.V. 2005. The role of daily surface forcing in setting the temperature and mixed layer structure of the Southern Ocean. Journal of Geophysical Research 101, C07006, doi:10.1029/2004JC002610.

Abstract

The role of high-frequency surface forcing in setting the temperature and mixed-layer structure in the Southern Ocean is investigated in an ocean general circulation model. The analysis suggests that daily fluctuations in the momentum flux, and the enhanced vertical mixing they produce, have the biggest effect on the time-mean temperature and mixed layer structure. In particular, summer-time surface temperatures are cooler, subsurface temperatures are warmer, and the mixed layer is thicker in the experiment with daily forcing than in the one without. The winter-time mixed layer in the Pacific sector is, however, thinner in the presence of daily forcing due to the enhanced density contrast between the mixed layer and the ocean below.

Daily fluctuations in the surface momentum flux are the leading cause of the high-frequency temperature variability at the high latitudes of the Southern Ocean, whereas the daily variability in the surface heat flux is more important at the mid latitudes. Since the air and sea-surface temperatures do not co-vary on short time scales in this study, daily fluctuations in the air temperature/humidity cause substantial variability in the air-sea turbulent exchanges of heat. The high-frequency part of the wavenumber-frequency spectrum of the daily SSTs is interpreted using a conceptual model of the response of the Southern Ocean to passing atmospheric storms. For high-to-medium frequencies, the preferred wavelengths in the conceptual model are determined by fast atmospheric advection; preferred low frequencies, in contrast, are determined by slow oceanic advection.