Further exploration on causes of temperature anomalies associated with the abnormal northern annular mode |
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Authors: | LingLing Suo BenKui Tan JiaYou Huang |
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Institution: | (1) Department of Atmospheric Science, School of Physics, Peking University, Beijing, 100871, China |
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Abstract: | This article concerns the temperature anomalies during the high index phase of the northern annual mode for the wintertime
from January to March. The response of the zonal and meridional winds and the temperature advection caused by the anomalous
horizontal wind are investigated. The results show that both the zonal and meridional winds experience strong anomalies and
the temperature advection induced by both the anomalous zonal and meridional winds is responsible for the temperature anomalies
associated with the high index northern annual mode. The temperature advection induced by the anomalous zonal wind contributes
dominantly to the cooling in the Atlantic and the Bering Sea while the temperature advection induced by the anomalous merional
wind contributes dominantly the warming in the United States of America and the cooling in southern Europe and Canada. The
superposed influences caused the obvious warming in north Eurasia.
Supported by National Natural Foundation of China Key Program (Grant No. 40533016) |
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Keywords: | northern annular mode Arctic Oscillation temperature advection air temperature anomaly abnormal wind |
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