Comments by "Old Scientist" (@OldScientist) on "Biden discusses climate change during State of the Union address" video.

  1. There is no climate crisis. The Earth was warmer in the recent and distant past. It also warmed faster in the past.
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  2. @Dinty  It was warmer during the Medieval (Elbert, 2013, 2.9°C above present), Roman (Margaritelli, 2020, 2°C above present), and Minoan Warm Periods (Lécuyer, 2018, 4°C above present). It was certainly warmer during the Holocene Climatic Optimum, so during our current interglacial. If you want a citation, try Quaternary Research Volume 53, Issue 3, May 2000, Pages 302-311. This makes the point that it was upto 7°C warmer on the shores of the Arctic during that time, with trees growing on the shores of the ocean (which would have been ice free in the summer), far to the north of the current treeline. The northern coast of Greenland was, during parts of the Pleistocene, warmer by double figures than today. The summer and winter average minimum temperatures of 10 degrees Celsius and 17 degrees C, respectively, were more than 10 degrees C warmer than present day. I think it was a maximum of 19 °C warmer than today. Remarkable. Maybe it was those pesky Neanderthals driving around in their SUVs. That one's been all over the news but if you want a citation I think it was in the 7th December 2022 issue of Nature. The original research was done by some Danish chappy. If you want some really rapid warming look at the CET (Central England Temperature) Instrumental Record between 1690 and 1730 (3°C increase). That won't be reliable enough for you though. Why not try the Dansgaard–Oeschger events? The Dansgaard–Oeschger events were global (Dima et al, 2018).About 11,500 years ago, averaged annual temperatures on the Greenland ice sheet increased by around 8 °C over 40 years, in three steps of five years, but a 5 °C change over 30–40 years is more common for these events. Some researchers believe the Medieval Warm Period was one of these, but I'm not convinced. However, I can provide upwards of 100 citations of science papers that together show the Medieval Warm Period was qualitatively and quantitatively warmer than the current warming, and that it was global in nature, focused around the year 1000. The current warming began around 1700 prior to any large scale combustion of fossil fuels. Also the warming has been small (1°C) and appears to have been largely beneficial. It has not been smooth, for example there was a period of cooling during the 50s, 60s and 70s (NOAA). When many scientists believed the next ice age had begun. Current warming is smaller than predicted by nearly all models (0.13°C per decade since 1979, UAH v6). This will result in a further 1° of warming by 2100 which can be adapted to, as with the previous 1°.
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  3. @Dinty  I've gone back to source. Actual scientific research. The boring stuff but the real stuff. The documentaries are easy on the eye, but do not have to be objective.
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