eCite Digital Repository

Comparison of subantarctic mode water and Antarctic intermediate water formation rates in the South Pacific between NCAR-CCSM4 and observations

Citation

Hartin, CA and Fine, RA and Kamenkovich, I and Sloyan, BM, Comparison of subantarctic mode water and Antarctic intermediate water formation rates in the South Pacific between NCAR-CCSM4 and observations, Geophysical Research Letters, 41, (2) pp. 519-526. ISSN 0094-8276 (2014) [Refereed Article]


Preview
PDF
2Mb
  

Copyright Statement

2013. The Authors. Licensed under Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported (CC BY-NC-ND 3.0) https://creativecommons.org/licenses/by-nc-nd/3.0/

DOI: doi:10.1002/2013GL058728

Abstract

Average formation rates for Subantarctic Mode Water (SAMW) and Antarctic Intermediate Water (AAIW) in the South Pacific are calculated from the National Center for Atmospheric Research Community Climate System Model version 4 (NCAR-CCSM4), using chlorofluorocarbon inventories (CFC-12). When compared to observations, CCSM4 accurately simulates the southeast Pacific as the main formation region for SAMW and AAIW. Formation rates for SAMW in CCSM4 are 3.4 sverdrup (Sv), about half of the observational rate, due in part to shallow mixed layers, a thinner SAMW layer, and insufficient meridional transport. A formation rate of 8.1 Sv for AAIW in CCSM4 is higher than observations due to higher inventories in the southwest and central Pacific and surface concentrations within CCSM4. Also, a lack of data in the southwest Pacific may bias the observational rate low. This model-observation comparison is useful for understanding the uptake and transport of other gases, e.g., CO2 by the model.

Item Details

Item Type:Refereed Article
Keywords:AAIW, CFC inventories, formation rates, SAMW, Carbon dioxide, AAIW, Antarctic intermediate waters, formation rates, meridional transport
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Oceanography not elsewhere classified
Objective Division:Environment
Objective Group:Other Environment
Objective Field:Antarctic and Sub-Antarctic Oceanography
Author:Sloyan, BM (Dr Bernadette Sloyan)
ID Code:119505
Year Published:2014
Web of Science® Times Cited:3
Deposited By:Sustainable Marine Research Collaboration
Deposited On:2017-08-02
Last Modified:2017-09-22
Downloads:6 View Download Statistics

Repository Staff Only: item control page