TITLE

Winter Lightning and North Atlantic Oscillation

AUTHOR(S)
de Pablo, Fernando; Soriano, Luis Rivas
PUB. DATE
July 2007
SOURCE
Monthly Weather Review;Jul2007, Vol. 135 Issue 7, p2810
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The relationship between the North Atlantic Oscillation (NAO) and total (in cloud and cloud to ground) lightning activity during the wintertime (December to March) is analyzed. Lightning data from the Optical Transient Detector were used and were studied in the North Atlantic and western European area. The southern half of the area analyzed (latitudes lower than ∼50°N) was observed to have an increased (decreased) lightning flash rate associated with negative (positive) NAO index values. The opposite relationship was found when the northern half (latitudes higher than ∼50°N) was considered. In both cases, the effect of the NAO on the lightning activity was stronger over the eastern area analyzed. Low (clearly <1) absolute values of the NAO index seem to be associated with minimum lightning activity.
ACCESSION #
25811858

 

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