TY - JOUR
T1 - Two Types of Mid-Latitudes Responses during La Niña
AU - Shiozaki, Masahiro
AU - Enomoto, Takeshi
N1 - Funding Information:
We would like to thank anonymous reviewers for their useful comments. This study was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI (Grant No.19H05698). The NOAA ERSST V5 data and NCEP Reanalysis data were provided by the NOAA/OAR/ESRL PSD, Boulder, Colorado, USA, from their Web site at https://www.esrl.noaa.gov/psd/. NCEP Reanalysis data provided by the NOAA/OAR/ESRL PSL, Boulder, Colorado, USA, from their Web site at https://psl.noaa.gov/.
Publisher Copyright:
©The Author(s) 2021. This is an open access article published by the Meteorological Society of Japan under a Creative Commons Attribution 4.0 International (CC BY 4.0) license (http://creativecommons.org/license/by/4.0)
PY - 2021/5/22
Y1 - 2021/5/22
N2 - La Niña cases that occurred after 1948 are classified into cold and non-cold winters in the Far East to investigate the formation of disparate teleconnection patterns corresponding to the two types and to compare with those during El Niño. According to composite analyses using reanalysis datasets, the North Pacific Oscillation (NPO)/western Pacific (WP) pattern (NPO/WP pattern) and the Pacific-North American (PNA) pattern dominate in the cold and non-cold winters, respectively. As during El Niño, modulations of the local Hadley circulation associated with La Niña play an important role in the formation of the teleconnection patterns. These results indicate that the formation mechanisms of teleconnection patterns during La Niña are the same as those during El Niño but are not simple reverse signals.
AB - La Niña cases that occurred after 1948 are classified into cold and non-cold winters in the Far East to investigate the formation of disparate teleconnection patterns corresponding to the two types and to compare with those during El Niño. According to composite analyses using reanalysis datasets, the North Pacific Oscillation (NPO)/western Pacific (WP) pattern (NPO/WP pattern) and the Pacific-North American (PNA) pattern dominate in the cold and non-cold winters, respectively. As during El Niño, modulations of the local Hadley circulation associated with La Niña play an important role in the formation of the teleconnection patterns. These results indicate that the formation mechanisms of teleconnection patterns during La Niña are the same as those during El Niño but are not simple reverse signals.
UR - http://www.scopus.com/inward/record.url?scp=85107795730&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85107795730&partnerID=8YFLogxK
U2 - 10.2151/sola.2021-016
DO - 10.2151/sola.2021-016
M3 - Article
SN - 1349-6476
VL - 17
SP - 103
EP - 108
JO - Scientific Online Letters on the Atmosphere
JF - Scientific Online Letters on the Atmosphere
ER -