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A comparative study of southern hemisphere blocking during the global weather experiment
Author(s) -
Lejenäs Harald
Publication year - 1987
Publication title -
quarterly journal of the royal meteorological society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.744
H-Index - 143
eISSN - 1477-870X
pISSN - 0035-9009
DOI - 10.1002/qj.49711347511
Subject(s) - blocking (statistics) , southern hemisphere , climatology , meteorology , northern hemisphere , data set , environmental science , geography , atmospheric sciences , mathematics , statistics , geology
Southern hemisphere blocking during the Global Weather Experiment has been studied. Two different data sets, and two different methods to identify blocking have been used. One data set consists of maps analysed at the Australian Bureau of Meteorology and the other of FGGE level III‐b data. the results show that one method, which tends to emphasize blocks accompanied by cut‐off lows, is more sensitive to data accuracy than the other, which is based on a count of persistent positive anomalies exceeding a certain threshold value.