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Hi I just found the NOAA table. It clearly shows that the N. hemisphere has warmed much more than the southern hemisphere since 1880!

enter image description here https://www.ncei.noaa.gov/access/monitoring/monthly-report/global/202113

What could be the reason for this? My idea is that the N. hemisphere has accumulated significantly more continental mass, while the S. hemisphere is almost continent-free. And the water is warming because the Gulf Stream is currently flushing more warm water northwards. Is my idea correct? Do you have other suggestions or are there suitable papers?

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    $\begingroup$ this may be helpful, jstage.jst.go.jp/article/sesj/26/4/26_374/…. $\endgroup$
    – John
    Jul 24 at 19:54
  • $\begingroup$ @Hexenbrei, thanks for your bounty! $\endgroup$
    – Weiss
    Aug 13 at 10:15
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    $\begingroup$ Consider that there a a lot more land in the northern hemisphere and land usage change is a contributor. $\endgroup$
    – John
    Aug 14 at 1:30
  • $\begingroup$ One small comment, the Gulf Stream is in fact likely slowing down, so less warm water will be moving northward. severe-weather.eu/global-weather/… $\endgroup$
    – arkaia
    Aug 14 at 2:19
  • $\begingroup$ This Question is very interesting, my theory for the cause is that, Yes your theory applies to, with less/more landmass on either hemisphere, but I also believe land usage and the prevelance of factories and other factors can play a role in pumping more greenhouse gases into the atmosphere, many cities are located in Europe/Russia/US etc. Currents would also play a role. I'm not sure if this combination of factors would lead to a definitive answer. $\endgroup$
    – Tardy
    Aug 16 at 14:56

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