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Volume 8, Issue 8 (Suppl) J Earth Sci Clim Change
ISSN: 2157-7617 JESCC, an open access journal Earth Science Congress 2017
September 18-19, 2017
Page 15
Notes:
conferenceseries.com
September 18-19, 2017 Hong Kong
6th International Conference on
Earth Science and Climate Change
Relationship between North American winter temperature and large-scale atmospheric circulation
anomalies and its decadal variation
The interannual relationship between North American (NA) winter temperature and large-scale atmospheric circulation
anomalies and its decadal variation are analyzed. NA temperature anomalies are dominated by two leading maximum
covariance analysis (MCA) modes of NA surface temperature and Northern Hemisphere 500-hPa geopotential anomalies. A
new teleconnection index, termed the Asian-Bering-North American (ABNA) pattern is constructed from the normalized
geopotential field after linearly removing the contribution of the Pacific-North American (PNA) pattern. The ABNA pattern
is sustained by synoptic eddy forcing. The first MCA mode of NA surface temperature is highly correlated with the PNA and
ABNA teleconnections and the second mode with the North Atlantic Oscillation (NAO). This indicates that NA temperature
is largely controlled by these three large-scale atmospheric patterns, i.e., the PNA, ABNA and NAO. These temperature-
circulation relationships appear stationary in the 20th century.
Biography
Bin Yu is a Research Scientist at the Climate Research Division of Environment and Climate Change in Canada. His research interest involves climate variability
and climate change, climate sensitivity and feedback, atmospheric circulation and teleconnection and tropical meteorology.
Bin Yu
Environment and Climate Change Canada, Canada
Bin Yu, J Earth Sci Clim Change 2017, 8:8 (Suppl)
DOI: 10.4172/2157-7617-C1-029