Editorial Type:
Article
Article Type:
Research Article

A New Monthly Pressure Dataset Poleward of 60°S since 1957

Ryan L. Fogt Department of Geography, and Scalia Laboratory for Atmospheric Analysis, Ohio University, Athens, Ohio

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Logan N. Clark Department of Geography, and Scalia Laboratory for Atmospheric Analysis, Ohio University, Athens, Ohio

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Julien P. Nicolas Polar Meteorology Group, Byrd Polar and Climate Research Center, The Ohio State University, Columbus, Ohio

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Print Publication:
15 May 2018
DOI:
https://doi.org/10.1175/JCLI-D-17-0879.1
Page(s):
3865–3874
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Abstract

This study presents a new monthly pressure dataset poleward of 60°S, from 1957 to 2016, based on a kriging interpolation from observed pressure anomalies across the Antarctic continent. Overall, the reconstruction performs well when evaluated against ERA-Interim. In comparison to other reanalyses, the reconstruction has interannual variability after 1970 similar to products that span the entire twentieth century and is a marked improvement on the first-generation reanalysis products. The reconstruction also produces weaker pressure trends than the reanalysis products evaluated here, which are consistent with observations. However, the skill of the reconstruction is weaker in the South Pacific and therefore does not improve the understanding of long-term pressure variability and trends in this region, where circulation changes have been key drivers of climate variability in West Antarctica and the Antarctic Peninsula.

Supplemental information related to this paper is available at the Journals Online website: https://doi.org/10.1175/JCLI-D-17-0879.s1.

© 2018 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).

Corresponding author: Ryan L. Fogt, fogtr@ohio.edu

Abstract

This study presents a new monthly pressure dataset poleward of 60°S, from 1957 to 2016, based on a kriging interpolation from observed pressure anomalies across the Antarctic continent. Overall, the reconstruction performs well when evaluated against ERA-Interim. In comparison to other reanalyses, the reconstruction has interannual variability after 1970 similar to products that span the entire twentieth century and is a marked improvement on the first-generation reanalysis products. The reconstruction also produces weaker pressure trends than the reanalysis products evaluated here, which are consistent with observations. However, the skill of the reconstruction is weaker in the South Pacific and therefore does not improve the understanding of long-term pressure variability and trends in this region, where circulation changes have been key drivers of climate variability in West Antarctica and the Antarctic Peninsula.

Supplemental information related to this paper is available at the Journals Online website: https://doi.org/10.1175/JCLI-D-17-0879.s1.

© 2018 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).

Corresponding author: Ryan L. Fogt, fogtr@ohio.edu

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