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17900 |
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Date: January 12, 2022 at 06:25:05
From: akira, [DNS_Address]
Subject: Is the Sun causing global warming? ...NASA responds... |
URL: https://climate.nasa.gov/faq/14/is-the-sun-causing-global-warming/ |
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This sounds like a strong argument, but I know there are a lot of folks who
believe climate change is being caused by the sun. Anyone got data to
refute this argument against it?
Is the Sun causing global warming?
temperature vs solar activity updated July 2020
The above graph compares global surface temperature changes (red line)
and the Sun's energy received by Earth (yellow line) in watts (units of
energy) per square meter since 1880. The lighter/thinner lines show the
yearly levels while the heavier/thicker lines show the 11-year average trends.
Eleven-year averages are used to reduce the year-to-year natural noise in
the data, making the underlying trends more obvious.
The amount of solar energy Earth receives has followed the Sun’s natural 11-
year cycle of small ups and downs with no net increase since the 1950s.
Over the same period, global temperature has risen markedly. It is therefore
extremely unlikely that the Sun has caused the observed global temperature
warming trend over the past half-century.
No. The Sun can influence Earth’s climate, but it isn’t responsible for the
warming trend we’ve seen over recent decades. The Sun is a giver of life; it
helps keep the planet warm enough for us to survive. We know subtle
changes in Earth’s orbit around the Sun are responsible for the comings and
goings of the ice ages. But the warming we’ve seen in recent decades is too
rapid to be linked to changes in Earth’s orbit and too large to be caused by
solar activity.
One of the “smoking guns” that tells us the Sun is not causing global
warming comes from looking at the amount of solar energy that hits the top
of the atmosphere. Since 1978, scientists have been tracking this using
sensors on satellites, which tell us that there has been no upward trend in
the amount of solar energy reaching our planet.
A second smoking gun is that if the Sun were responsible for global
warming, we would expect to see warming throughout all layers of the
atmosphere, from the surface to the upper atmosphere (stratosphere). But
what we actually see is warming at the surface and cooling in the
stratosphere. This is consistent with the warming being caused by a buildup
of heat-trapping gases near Earth's surface, and not by the Sun getting
“hotter.”
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Responses:
[17901] [17902] |
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17901 |
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Date: January 12, 2022 at 12:00:39
From: ryan, [DNS_Address]
Subject: Re: Is the Sun causing global warming? ...NASA responds... |
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nope...have not read any...it is pretty clear that the global warming is caused by human activity...
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Responses:
[17902] |
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17902 |
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Date: January 12, 2022 at 13:22:45
From: akira, [DNS_Address]
Subject: Re: Is the Sun causing global warming? ...NASA responds... |
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that's what the article is suggesting.
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Responses:
None |
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