Antarctica cooling since Roman Times, climate models wrong (again)

–  Antarctica cooling since Roman Times, climate models wrong (again):

A new study suggests temperatures across Antarctica have been falling for the last 1,600 years.  This natural climate change would have been a threat to baby penguins, forcing them to walk much further across sea-ice for food. (Looks like it was even worse for polar bears ;-) ). The cooling trend would have threatened inland lakes, shortened summer breeding periods, affected seal behaviour, extended glaciers over important habitats, and destroyed rare tundra. It may have contributed to the death of a man called Scott. If man-made climate change warmed Antarctica we need to burn more oil.

Any recent weak “man-made” warming trend would have slightly reversed this destructive slide — restoring the continent back to levels last seen in 1400AD. Though, given that the models are wrong about everything, including Antarctic warming, maybe not.

These trends are not what the Climate Models predicted for Antarctica. The slight recent warming trend is too small. (Polar Amplification, anyone?)

The Daily Caller:

However, Stenni admits the “absence of significant continent-scale warming of Antarctica over the last 100 years is in clear contrast with the significant industrial-era warming trends that are evident in reconstructions for all other continents (except Africa) and the tropical oceans.”

This lack of warming “is not in agreement with climate model simulations, which consistently produce a 20th century warming trend over Antarctica in response to greenhouse gas forcing,” Stenni wrote.

From Stenni, et al (2017)

We produce both unweighted and weighted isotopic (δ18O) composites and temperature reconstructions since 0 CE, binned at 5- and 10-year resolution, for seven climatically distinct regions covering the Antarctic continent

Our new reconstructions confirm a significant cooling trend from 0 to 1900 CE across all Antarctic regions where records extend back into the 1st millennium, with the exception of the Wilkes Land coast and Weddell Sea coast regions. Within this long-term cooling trend from 0 to 1900 CE, we find that the warmest period occurs between 300 and 1000 CE, and the coldest interval occurs from 1200 to 1900 CE. Since 1900 CE, significant warming trends are identified for the West Antarctic Ice Sheet, the Dronning Maud Land coast and the Antarctic Peninsula regions…

For anyone who doesn’t know, as I’ve been saying for years, the parts of West Antarctica that have warmed lately seem to have big volcano’s under them, coincidence?:

h/t GWPF


Stenni, B., Curran, M. A. J., Abram, N. J., Orsi, A., Goursaud, S., Masson-Delmotte, V., Neukom, R., Goosse, H., Divine, D., van Ommen, T., Steig, E. J., Dixon, D. A., Thomas, E. R., Bertler, N. A. N., Isaksson, E., Ekaykin, A., Werner, M., and Frezzotti, M.: Antarctic climate variability on regional and continental scales over the last 2000 years, Clim. Past, 13, 1609-1634,, 2017.

H/t reader kevin a.

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