The Aleutian Low is one of the principal causal factors of the weather and climate systems of the Northern
Hemisphere.Based on reanalysis datasets provided by the National Centers for Environmental Prediction (NCEP) from
1970 to 2005, the climatological features of Aleutian low in winter were characterized. It is shown from the study results
that in the late 1970s, the winter Aleutian low’s intensity changed from weak to strong. Then, the relationship between
Aleutian low and sea surface heat flux in the North Pacific was analyzed by singular value decomposition (SVD) and
correlation analysis. Aleutian low’s intensity was positively correlated with the sea surface heat flux in the central North
Pacific, and negatively correlated with the sea surface heat flux in the west coast of North America.
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