September 1st is
Meteorological Autumn:
By the meteorological calendar, the first day of autumn is always 1 September; ending on 30 November. The seasons are defined as spring (March, April, May), summer (June, July, August), autumn (September, October, November) and winter (December, January, February).
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Meteorological Versus Astronomical Seasons:
The Astronomical Seasons
The natural rotation of Earth around the sun forms the basis for the astronomical calendar, in which we define seasons with two solstices and two equinoxesPeople have used observable periodic natural phenomena to mark time for thousands of years. The natural rotation of Earth around the sun forms the basis for the astronomical calendar, in which we define seasons with two solstices and two equinoxes. Earth’s tilt and the sun’s alignment over the equator determine both the solstices and equinoxes.
The equinoxes mark the times when the sun passes directly above the equator. In the Northern Hemisphere, the summer solstice falls on or around June 21, the winter solstice on or around December 22, the vernal or spring equinox on or around March 21, and the autumnal equinox on or around September 22. These seasons are reversed but begin on the same dates in the Southern Hemisphere.ncei.noaa.gov/...
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The Meteorological Seasons
Meteorologists and climatologists break the seasons down into groupings of three months based on the annual temperature cycle as well as our calendar.
Meteorologists and climatologists break the seasons down into groupings of three months based on the annual temperature cycle as well as our calendar. We generally think of winter as the coldest time of the year and summer as the warmest time of the year, with spring and fall being the transition seasons, and that is what the meteorological seasons are based on. Meteorological spring includes March, April, and May; meteorological summer includes June, July, and August; meteorological fall includes September, October, and November; and meteorological winter includes December, January, and February.
Meteorological observing and forecasting led to the creation of these seasons, and they are more closely tied to our monthly civil calendar than the astronomical seasons are. The length of the meteorological seasons is also more consistent, ranging from 90 days for winter of a non-leap year to 92 days for spring and summer. By following the civil calendar and having less variation in season length and season start, it becomes much easier to calculate seasonal statistics from the monthly statistics, both of which are very useful for agriculture, commerce, and a variety of other purposes.
Learn more about the monthly, seasonal, and yearly global and U.S. climates in our State of the Climate reports. Get the latest temperature, precipitation, drought, and hazards outlooks from NOAA’s Climate Prediction Center.
www.ncei.noaa.gov/…
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Sep 23, 2019 · However under the meteorological definition, which is based on the Gregorian calendar, autumn begins earlier on September 1.
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We amicably discuss animals, weather, climate, soil, plants, clouds ,rocks, waters, the Earth-
and note life’s patterns.
We invite you to note what you are seeing around you in your own part of the world, and to share your observations in the comments below.)
The Daily Bucket is a regular feature of the Backyard Science group. It is a place to note any observations you have made of the world around you. Animals, weather, meteorites, climate, soil, plants, waters are all worthy additions to the Bucket. Please let us know what is going on around you in a comment. Include, as close as is comfortable for you, your location. Each note is a record that we can refer to in the future as we try to understand the patterns that are quietly unwinding around us.
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Toad butt™ by Angmar for The Daily Bucket
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