Breaking News from Los Alamos National Laboratory at Science Daily Arctic temperatures are increasing four times faster than global warming. As you can see, the alarm is not based on field observations in the Arctic Circle, but comes from computers in Los Alamos, New Mexico. Excerpts in italics with my bolds.
A new analysis of observed temperatures shows the Arctic is heating up more than four times faster than the rate of global warming. The trend has stepped upward steeply twice in the last 50 years, a finding missed by all but four of 39 climate models.
From 39 climate-change models in the widely used CMIP6 collection of the Coupled Model Intercomparison Project, the international research team found four that reproduced the first step reasonably well around 1986, but none that reproduced the second step in 1999. CMIP is an international collaborative of climate models using a shared set of parameters. CMIP6 has been used to create recent Intergovernmental Panel on Climate Change Assessment Report.
Arctic Warming Unalarming
Now let’s compare that fearful news with records from surface weather stations around the Arctic Circle.
An recent extensive analysis of Northern surface temperature records gives no support for Arctic “amplification” fears.
The Arctic has warmed at the same rate as Europe over the past two centuries. Heretofore, it has been supposed that any global warming would be amplified in the Arctic. This may still be true if urban heat island effects are responsible for part of the observed temperature increase at European stations. However, European and Arctic temperatures have remained closely synchronized for over 200 years during the rapid growth of urban centres.
And the warming pattern in Europe and the Arctic is familiar and unalarming.
Arctic temperatures have increased during the period 1820– 2014. The warming has been larger in January than in July. Siberia, Alaska and Western Canada appear to have warmed slightly more than Eastern Canada, Greenland, Iceland and Northern Europe. The warming has not occurred at a steady rate. Much of the warming trends found during 1820 to 2014 occurred in the late 1990s, and the data show temperatures levelled off after 2000. The July temperature trend is even slightly negative for the period 1820–1990. The time series exhibit multidecadal temperature fluctuations which have also been found by other temperature reconstructions.
The paper is:
Arctic temperature trends from the early nineteenth century to the present W. A. van Wijngaarden, Theoretical & Applied Climatology (2015) here
Temperatures were examined at 118 stations located in the Arctic and compared to observations at 50 European stations whose records averaged 200 years and in a few cases extend to the early 1700s.
The data and results for all stations are provided in detail, and the findings are inescapable.
The Arctic has warmed at the same rate as Europe over the past two centuries. . . The warming has not occurred at a steady rate. . .During the 1900s, all four (Arctic) regions experienced increasing temperatures until about 1940. Temperatures then decreased by about 1 °C over the next 50 years until rising in the 1990s.
For the period 1820–2014, the trends for the January, July and annual temperatures are 1.0, 0.0 and 0.7 °C per century, respectively. . . Much of the warming trends found during 1820 to 2014 occurred in the late 1990s, and the data show temperatures levelled off after 2000.
Once again conclusions based on observations are ignored while projections from models are broadcast and circulated like gossip. The only amplification going on is the promotion of global warming alarms.
Footnote: I did a study last year of 25 World Class surface temperature records (all European) and found the same patterns (here).
via Science Matters
July 7, 2022 at 08:30AM