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Evaluating Uncertainty and Modes of Variability for Antarctic Atmospheric Rivers.

Authors :
Shields CA
Wille JD
Marquardt Collow AB
Maclennan M
Gorodetskaya IV
Source :
Geophysical research letters [Geophys Res Lett] 2022 Aug 28; Vol. 49 (16), pp. e2022GL099577. Date of Electronic Publication: 2022 Aug 26.
Publication Year :
2022

Abstract

Antarctic atmospheric rivers (ARs) are driven by their synoptic environments and lead to profound and varying impacts along the coastlines and over the continent. The definition and detection of ARs over Antarctica accounts for large uncertainty in AR metrics, and consequently, impacts quantification. We find that Antarctic-specific detection tools consistently capture the AR footprint inland over ice sheets, whereas most global detection tools do not. Large-scale synoptic environments and associated ARs, however, are broadly consistent across detection tools. Using data from the Atmospheric River Tracking Method Intercomparison Project and global reanalyses, we quantify the uncertainty in Antarctic AR metrics and evaluate large-scale environments in the context of decadal and interannual modes of variability. The Antarctic western hemisphere has stronger connections to both decadal and interannual modes of variability compared to East Antarctica, and the Indian Ocean Dipole's influence on Antarctic ARs is stronger while in phase with El Nino Southern Oscillation.<br /> (© 2022. The Authors.)

Details

Language :
English
ISSN :
0094-8276
Volume :
49
Issue :
16
Database :
MEDLINE
Journal :
Geophysical research letters
Publication Type :
Academic Journal
Accession number :
36249465
Full Text :
https://doi.org/10.1029/2022GL099577