Interannual variation of stable isotopes in Antarctic precipitation in response to El Niño-Southern Oscillation

Evidence for a close relationship between the interannual variation of stable isotopes in Antarctic precipitation and the El Nino-Southern Oscillation (ENSO) was found. Anomalies of sea surface temperature in the Equatorial Pacific and delta super(18)O in precipitation in the Antarctic Peninsula are...

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Bibliographic Details
Published in:Geophysical research letters 2002, Vol.29 (1), p.1.1-1.4, Article 1001
Main Authors: ICHIYANAGI, Kimpei, NUMAGUTI, Atusi, KATO, Kikuo
Format: Article
Language:English
Subjects:
Antarctica
Chemical composition and interactions. Ionic interactions and processes
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
Water in the atmosphere (humidity, clouds, evaporation, precipitation)
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Summary:Evidence for a close relationship between the interannual variation of stable isotopes in Antarctic precipitation and the El Nino-Southern Oscillation (ENSO) was found. Anomalies of sea surface temperature in the Equatorial Pacific and delta super(18)O in precipitation in the Antarctic Peninsula are negatively correlated, both having a strong spectral power at about 3 years. The low (high) anomaly of delta super(18)O is associated with southerly (northerly) and cold (warm) anomalies, which are considered appear as a response to the ENSO teleconnection. It was suggested that the flux and transport passway of southward moisture are the main factors determining the observed variation of stable isotopes in Antarctic precipitation.
ISSN:0094-8276
1944-8007
DOI:10.1029/2000gl012815