Dagens bild 4 februari 2019


Västantarktis har blivit svagt kallare under de senaste 2000 åren. Det gäller även hela Antarktis. Detta enligt mätningar i borrhål plus datamodelleringar.

Från https://www.clim-past-discuss.net/cp-2017-40/cp-2017-40.pdf

Under de senaste 100 en viss temperaturuppgång som inte är exceptionell jämfört med tidigare århundraden. Tyvärr orkar jag inte översätta allt. Detta var inte riktigt vad modellerna sa.

(1) Temperatures over the Antarctic continent show an overall coolingtrend during the period from 0 to 1900CE, which appears strongest in West Antarctica, and (2) no continent-scale warming ofAntarctic temperature is evident in the last century.

The robust and significant long-term cooling trend of Antarctic-wide temperatures from 0-1900 CE is also reflected in thebroader East Antarctic and West Antarctic regions. In East Antarctica the coldest interval occurs from 1200 and 1900 CE.

The absence of significant continent-scale warming of Antarctica over the last 100 years is in clear contrast with the significantindustrial era warming trends that are evident in reconstructions for all other continents (except Africa) and the tropical oceans10 (Abram et al., 2016). As noted in other studies (e.g. Abram et al., 2016; Jones et al., 2016) the absence of continent-scalewarming over Antarctica is not in agreement with climate model simulations, which consistently produce a 20th Centurywarming trend over Antarctica in response to greenhouse gas forcing. The high interannual climate variability with respect toDespite the lack significant warming over the last 100 years at the continent scale, there are three regions which show positiveand significant isotopic and temperature trends: the Antarctic Peninsula, the West Antarctic Ice Sheet and the coastal DronningMaud Land.