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Climate Change 2016
October 27-29, 2016
Volume 7, Issue 9(Suppl) J Earth Sci Clim Change
ISSN: 2157-7617 JESCC, an open access journal
conferenceseries .com
October 24-26, 2016 Valencia, Spain
World Conference onClimate Change
Inter-annual variability of wintertime monthly surface air temperature in China
Maoqiu Jian and Dan Jia
Sun Yat-sen University, China
Based on observed and reanalysis data, this study analyzes the spatiotemporal variations of monthly surface temperature
in winter in China, their interrelationship and the related anomalous circulation on the inter-annual timescale. The
atmospheric internal mechanisms for the inter-annual variation of surface temperature are also discussed. The dominant inter-
annual mode is uniform across China, except in the Tibetan Plateau, for all winter months, while the second mode is a north–
south dipole mode with opposite sign. The dominant inter-annual modes of surface temperature in January and February are
closely correlated to each other in phase, but are to some extent negatively correlated with that in the prior December. The
dominant inter-annual modes of monthly surface temperature in winter are also linked to the opposite-sign dipole anomalous
patterns of surface temperature in the Eurasian continent. The anomalous temperature signals associated with the nationwide
winter surface temperature anomalies may extend up to high levels in the troposphere, with the most intense signals at the
surface. The surface temperature anomalies may induce the air temperature anomalies from the near surface to the upper
troposphere via the upward long wave radiation flux anomalies emitted from the underlying surface. In all winter months, the
intensified westerly over the northern Eurasian continent hinders the southward intrusion of cold air from high latitudes, and
then results in a deep warm anomaly over winter in China, and an even larger part of the Eurasian continent.
Biography
Maoqiu Jian has completed his PhD from Sun Yat-sen University of China. He is a Professor of school of Atmospheric Sciences, Sun Yat-sen University, a top ten
university in China. He has published more than 60 papers in reputed journals.
Maoqiu Jian et al., J Earth Sci Clim Change 2016, 7:9(Suppl)