[Sky]
Polar lights are one of the most beautiful natural phenomena on Earth If we were to rank the most beautiful atmospheric phenomena, we would definitely give one of the highest places to polar lights. The ideal time for them is clear frosty nights from September to March at latitudes of about 67–70°.
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[Earth]
Meteorological Autumn and Astronomical Autumn are two different ways of defining the seasons: Meteorological Autumn: Meteorological seasons are based on the calendar months and are primarily used by meteorologists and climatologists for consistent and simplified record-keeping and forecasting. In the meteorological definition, autumn is considered to be the three calendar months of September, October, and November in the Northern Hemisphere, and March, April, and May in the Southern Hemisphere.
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[Sky]
March 20 is the day of the vernal equinox, after which the length of the day will gradually become longer than that of the night. On the equinox day the Sun will cross the celestial equator and equalize day and night. That will start an astronomical spring in the northern hemisphere.
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[Earth]
Meteorological Spring and Astronomical Spring are two ways of defining the start of spring, but they are based on different criteria. Meteorological Spring refers to the three calendar months of March, April, and May in the Northern Hemisphere (or September, October, and November in the Southern Hemisphere). These months are considered to be spring because they generally have milder temperatures and more rainfall than the preceding winter months, and the days start to become longer.
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[Earth]
Here is how hot March 2022 is forecast compared to all March months from 1920 to 2020 according to climate models.
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[Earth]
Here is how hot March 2021 was compared to all March months from 1920 to 2020.
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