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Influence of the boreal spring Southern Annular Mode on summer surface air temperature over northeast China

 

Fei Zheng,¹ Jianping Li,^2,3* Robin T. Clark,⁴ Ruiqing Ding,¹ Fei Li⁵ and Lei Wang^6,7

 

1 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China

2 College of Global Change and Earth System Science, Beijing Normal University, China

3 Joint Center for Global Change Studies, Beijing, China

4 Hadley Centre, Met Office, Exeter, UK

5 State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of

Sciences, Beijing, China

6 School of Physics, Peking University, Beijing 100871, China

7 Key Laboratory of Research on Marine Hazards Forecasting, National Marine Environmental Forecasting Center, Beijing 100081, China

 

ABSTRACT

Previous evidence has showed that the boreal spring Southern Annular Mode (SAM) regulates summer monsoon precipitation in East Asian subtropics through the Northern Indian Ocean sea surface temperature (NIO SST). This paper further demonstrates how a positive (negative) boreal spring SAM is usually followed by a warmer (cooler) summer over northeast China (NEC), suggesting impacts of the SAM even extend to the northern mid-latitudes. A positive spring SAM usually leads to anomalous anticyclonic sinking motion over NEC during summer through the NIO SST, which results in cloud reduction and changes in radiation, and thus surface warming.

 

KEY WORDS: Southern Annular Mode (SAM), summer surface air temperature, cloudiness, radiation budget, sea surface temperature

 

PUBLISHED BY: Atmos. Sci. Let., 2014, online, DOI: 10.1002/asl2.541

 

SOURCE: http://onlinelibrary.wiley.com/doi/10.1002/asl2.541/abstract