Jan. 5, 2015
Latest data shows cooling Sun, warming Earth
Posted on 5 January 2016 by MarkR
Lots of studies into the Sun-climate link have reported that recent changes in the heat output by the Sun are simply too small to explain much of the recent global warming. Even 5 years ago it was clear that Earth's temperature isn't tracking solar activity very well.
And now including data up to 2015, that pattern is even clearer.
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Earth's surface has continued to warm despite declining solar activity.
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The temperature record is from NASA and the solar heat output arriving at the top of Earth's atmosphere, the "Total Solar Irradiance" comes from two sources. From 1978 we have satellite measurements, in this case from PMOD (data here). Before that, the heat output was not measured directly, but instead it has to be estimated from measurements of sunspots,
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To try and keep the graph clear, we only showed the results using the NASA GISTemp temperature record and the PMOD satellite solar activity record. Other records do exist: for temperature there is BEST, HadCRUT4 and Cowtan & Way's modification, NOAA and JMO. For solar activity there is ACRIM. For the warming since 1970, all of the records agree on the trend to within 5 % so the big picture is not changed by the choice of temperature record.
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