Since 1976 strong changes in seasonal cycle have taken place, with winters becoming warmer and summers colder. The annual range of monthly mean temperature in the latest 21 years was 1.7 ℃ less than in the earlier 43 years.

  • 1976年起季节循环有明显变化,冬季变暖夏季变凉,月平均气温的年较差比前43年减小1.7℃。

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