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Why are summers warmer than winters in the mid-latitudes of the Northern Hemisphere?

Why are summers warmer than winters in the mid-latitudes of the Northern Hemisphere?

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The earth is 3.1 million miles closer to the sun in January than in July but... View the full answer

4 comments
  • The sunlight beam that strikes at an angle is spread across a greater surface area, and is therefore a less intense heat source than a beam striking the earth surface directly.
    • Prof_SCM
    • Mar 08, 2016 at 1:59am
  • Another important factor is that the daylight hours are shorter in the Northern Hemisphere during the winter months.
    • Prof_SCM
    • Mar 08, 2016 at 1:59am
  • Even though the far northern latitudes are receiving more hours of sunlight in the summer, the sun angle is still considerably low. It is true that the northern latitudes are receiving more solar radiation at the top of the atmosphere,
    • Prof_SCM
    • Mar 08, 2016 at 2:00am
  • but the sunlight penetrating through the northern atmosphere will be partially scattered by fine dust and air molecules, reflected by clouds, and absorbed by atmospheric gases.
    • Prof_SCM
    • Mar 08, 2016 at 2:00am

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There are four seasons in the mid-latitudes that encompass 3 months each.  The four seasons are currently based purely on... View the full answer

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