Great Lakes winter-weather 700-hPa PNA teleconnections

A positive 700-hPa Pacific-North America (PNA) circulation index in December 1989 was replaced by a negative PNA index in January and February 1990. This circulation pattern reversal was associated with an anomaly reversal in air temperatures over the eastern half of the United States and anomaly re...

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Bibliographic Details
Published in:Monthly weather review 1992-09, Vol.120 (9), p.2156-2163
Main Author: ASSEL, R. A
Format: Article
Language:English
Subjects:
Earth, ocean, space
Exact sciences and technology
External geophysics
Meteorology
Weather analysis and prediction
Online Access:Get full text
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Summary:A positive 700-hPa Pacific-North America (PNA) circulation index in December 1989 was replaced by a negative PNA index in January and February 1990. This circulation pattern reversal was associated with an anomaly reversal in air temperatures over the eastern half of the United States and anomaly reversals in the air temperature, snowfall, and ice cover of the Great Lakes. Evidence of PNA teleconnections with these Great Lakes climatic variables for a 20-winter base period is presented through correlations of anomalies in the monthly 700-hPa PNA index and PNA coordinates with anomalies in Great Lakes average monthly air temperature, snowfall, and ice cover.
ISSN:0027-0644
1520-0493
DOI:10.1175/1520-0493(1992)120<2156:GLWWHP>2.0.CO;2