edu.ucar.opensky::articles:24832 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T23:02:45.857552 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7mp56rv https://doi.org/10.26024/b290-an76 https Related Dataset #1 CESM iTraCE project Testing methods for reconstructing glacial Antarctic circumpolar current transport in an isotope-enabled climate model 2021-10-01T00:00:00Z publication https://n2t.org/ark:/85065/d7mp56rv https://doi.org/10.1029/2020PA004183 Li, L. author Liu, Z. author Lynch-Stieglitz, J. author He, C. author Gu, S. author Zhang, J. author Otto-Bliesner, Bette author UCAR/NCAR - Library publisher The Antarctic Circumpolar Current (ACC) plays a vital role in the interbasin exchange of ocean properties. A robust method to reconstruct the ACC baroclinic transport is helpful to assess the ACC's sensitivity to a changed climate. Here we test the reconstruction methods at the Last Glacial Maximum (LGM; similar to 20 ka) using end-member water masses in a fully coupled, isotope-enabled Community Earth System Model. Model results suggest that the density profile at the northern side of ocean margins across the ACC can be reconstructed well from end-member water masses of Subtropical Surface Water (STSW), Antarctic Intermediate Water (AAIW), and Lower Circumpolar Deep Water. One additional pore fluid observation at 1,000 m can substantially improve transport reconstruction and is essential to constrain the sign of change in ACC transport during the LGM. Moreover, the uncertainty in transport calculation is large when salinities for STSW and AAIW are reconstructed independently based on the delta O-18(sw)-Salinity relationship of surface and intermediate waters in the South Indian Ocean. More direct measurements of LGM temperature and salinity may allow better transport reconstruction. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2021 American Geophysical Union. None eng geoscientificInformation