TY - JOUR
T1 - Arctic Sea Ice Loss and Eurasian Cooling in Winter 2020−21
AU - Nishii, Kazuaki
AU - Taguchi, Bunmei
AU - Mori, Masato
AU - Kosaka, Yu
AU - Nakamura, Hisashi
N1 - Publisher Copyright:
© The Author(s) 2022. 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 - 2022
Y1 - 2022
N2 - Anomalous coldness was observed over midlatitude Eurasia in December 2020 and over subpolar Eurasia in January 2021. The former was accompanied by the Warm Arctic and Cold Eurasia (WACE) pattern, while the latter by the negative phase of the Arctic Oscillation (AO). A set of large ensemble experiments with an atmospheric general circulation model suggests a contribution of reduced Arctic Sea ice to the midlatitude cooling and WACE pattern in December 2020. The tropical and extratropical sea surface temperature (SST) anomalies, however, contribute to warming over midlatitude Eurasia. In January 2021, neither the sea ice nor SST anomalies can explain the subpolar Eurasian cooling and the negative AO in our experiments.
AB - Anomalous coldness was observed over midlatitude Eurasia in December 2020 and over subpolar Eurasia in January 2021. The former was accompanied by the Warm Arctic and Cold Eurasia (WACE) pattern, while the latter by the negative phase of the Arctic Oscillation (AO). A set of large ensemble experiments with an atmospheric general circulation model suggests a contribution of reduced Arctic Sea ice to the midlatitude cooling and WACE pattern in December 2020. The tropical and extratropical sea surface temperature (SST) anomalies, however, contribute to warming over midlatitude Eurasia. In January 2021, neither the sea ice nor SST anomalies can explain the subpolar Eurasian cooling and the negative AO in our experiments.
UR - http://www.scopus.com/inward/record.url?scp=85139341095&partnerID=8YFLogxK
U2 - 10.2151/SOLA.2022-032
DO - 10.2151/SOLA.2022-032
M3 - 学術論文
AN - SCOPUS:85139341095
SN - 1349-6476
VL - 18
SP - 199
EP - 204
JO - Scientific Online Letters on the Atmosphere
JF - Scientific Online Letters on the Atmosphere
ER -