18 JANUARY 2021Tags: Greenland
Not many people know that
By Paul Homewood
Greenland Ice Change (DMI)
DMI has not yet managed to update its Greenland ice sheet maps for the past year, but the data is available from NASA by October.
In any case, the DMI chart is pretty difficult to spot by trend and has the usual skewed y-axis that gives the impression that the ice cap will soon be gone.
Using actual NASA data derived from GRACE satellite measurements, we can see the year-to-year changes below, which clearly tell us what actually happened:
The warm summers of 2012 and 2019 stand out, but there were also cold wet summers like 2017 and 2018.
What is obvious is that there has been no acceleration of the melt since records began in 2002. This contradicts the alarming message that is widely spread, for example the always reliable BBC!
The average annual mass loss since 2002 is 264 Gt, but this is a microscopic amount compared to the total ice cap mass, which weighs 2.6 million Gt. And as the graph above shows, the rise in sea level over the past few decades has only been around 10 mm due to the melt.
There is, of course, no reason why we should be surprised or alarmed by this melting at all. We know that Greenland is warmer now than it was in the 19th century. Ice cores prove that it was the coldest era there since the end of the Ice Age.
We know that the temperatures in Greenland are no higher now than they were in the 1920s to 50s. And we also know that the glaciers there grew massively between the Middle Ages and the Little Ice Age.
There is no evidence whatsoever that the melt is suddenly running away. In fact, everything indicates that it is a natural event that may potentially reverse or slow down as the Atlantic multidecadal oscillation transitions to the cold phase and temperatures in Greenland are high just as they were between the 1960s and 90s sink.