Also included in the model were the 11-year solar cycle and the effects of solar radiation on stratospheric ozone. Schmidt noted that long-term changes in solar irradiance have influenced the upper atmosphere. Because the upper polar atmosphere becomes colder when ozone is depleted, the winds circling the pole are slightly enhanced. Shindell said that the warming trend will probably continue over the next 30 years as greenhouse gases continue to increase in the atmosphere. This is only an abstract.
Greenhouse gases main reason for quicker northern winter warming.
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