klimatos
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During the last inter-glacial (LIG), which ended some 120,000 years ago, hippopotami appear to have been abundant in the Thames River basin near what is now London. (Petersen & Lieberman, 2012) It appears that global temperatures were some 2°C warmer (less in the tropics, more in the upper mid-latitudes) during the LIG.
The current interglacial bids fair to surpass those temperatures, if NOAA is to be believed: "Astronomical calculations show that 65N summer insolation should increase gradually over the next 25,000 years, . . . http://www.ncdc.noaa.gov/paleo/milankovitch.html
And that's not counting the effects of increased CO2 levels (401.58 ppm as of October of 2015).
The current interglacial bids fair to surpass those temperatures, if NOAA is to be believed: "Astronomical calculations show that 65N summer insolation should increase gradually over the next 25,000 years, . . . http://www.ncdc.noaa.gov/paleo/milankovitch.html
And that's not counting the effects of increased CO2 levels (401.58 ppm as of October of 2015).