The long-term trends for SPW1 in the annual winter mean temperature amplitude, as a function of pressure and latitude, from a linear regression analysis over three durations, i.e., the winters of 41 years (1979/1980- 2019/2020), the fore part of that time (IMAGE)

Beijing Zhongke Journal Publising Co. Ltd.

The long-term trends for SPW1 in the annual winter mean temperature amplitude, as a function of pressure and latitude, from a linear regression analysis over three durations, i.e., the winters of 41 years (1979/1980- 2019/2020), the fore part of that time

Caption

Latitude-pressure sections of the long-term trends (unit: K per year); contour intervals are 0.02 K per year for (a), (b), and (c) of the annual winter mean stationary planetary wave temperature amplitude with wavenumber 1 (SPW1). From (a) to (c) are the trends for 1980-2020, 1980-2002, and 2002-2020, respectively. The solid and dashed contours denote the positive and negative trends, respectively. Cyan stippling indicates results above 90% confidence level according to the two-sided Student’s t-test.

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Beijing Zhongke Journal Publising Co. Ltd.

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