Open AccessChange in the dominant decadal patterns and the late 1980s abrupt warming in the extratropical Northern Hemisphere
Author(s) -
Lo TzuTing,
Hsu HuangHsiung
Publication year - 2010
Publication title -
atmospheric science letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.951
H-Index - 45
ISSN - 1530-261X
DOI - 10.1002/asl.275
Subject(s) - extratropical cyclone , climatology , northern hemisphere , environmental science , pacific decadal oscillation , southern hemisphere , arctic oscillation , global warming , climate change , arctic , the arctic , climate model , atmospheric sciences , el niño southern oscillation , oceanography , geology
Abstract Widespread abrupt warming in the extratropical Northern Hemisphere (NH) occurred in the late 1980s. This warming was associated with a change in the relative influence of the Pacific Decadal Oscillation (PDO)‐like pattern and the Arctic Oscillation (AO)‐like pattern. The AO‐like pattern has had a dominant influence on the NH‐mean temperature since the late 1980s, whereas the influence of the PDO has weakened. The AO‐like mode appears as part of natural variability in the pre‐industrial simulations of the CMIP3/IPCC climate models. However, its emergence in the late 1980s was not simulated by most models with or without the observed increasing greenhouse effect in the 20th century. Copyright © 2010 Royal Meteorological Society