We reported on the first ICESat-2 sea ice thickness data to be released back in May. We are now very pleased to be able to reveal that the data up to April 2021 is now available for download from the NSIDC web site. Here’s a visualisation of April’s data:
This month has begun with a couple of CryoSat-2 related papers. First we have one that I unexpectedly I found out about via Twitter:
Regular readers will recall that the thickness in mid April by the AWI’s CryoSat-2/SMOS metric seemed remarkably low, so I had to ask this question:
It’s been a long wait since NASA launched the ICESat-2 satellite in September 2018:
However some good news has arrived at long last! ICESat-2 level 4 monthly gridded Arctic sea ice thickness data is now available for download via the NSIDC:
In the absence of the usual mid month PIOMAS Arctic sea ice volume update I’m being moaned at by “angech” over on Judith Curry’s “Climate Etc.” blog:
Any ideas on why PIOMAS mid month update not out, other than not wanting to show a big recovery?
Unlike any of Judy’s denizens I checked out the comparatively new merged CryoSat-2 plus SMOS thickness maps from the Alfred Wegener Institute. “Measured” rather than “modelled” data must be a good thing surely?
Whilst we await the PIOMAS volume numbers which generally arrive around the 5th of each month, and before we look at graphs of extent, with the refreeze well under way some “measured” thickness maps are coming back! Here’s the first SMOS map this autumn:
We generally write our periodic reports on the state of Arctic sea ice around the time the PIOMAS volume numbers are published. It seems as though we’ll have a long wait for that to happen at the moment though. According to The Economist today:
In certain quarters it is being claimed in slightly strange English that:
The British Navy takes part in ICEX exercises that take place every two years and last for several weeks. Royal Navy submarine HMS Trenchant broke through the Arctic ice about seven days ago to join two US submarines for the exercise. At the same time, US submarines Hartford and Connecticut were stuck in the Arctic ice as they were training an attack on Russia. According to the legend of the exercises, the US submarines were supposed to surface and strike conditional targets in Russia, but the thick ice prevented them from fulfilling the scenario of the exercise.
Yesterday I found myself in conversation with Nigel and “Steve” on Twitter about NOAA’s recent report on Arctic temperatures and the seemingly unrelated topic of Russian icebreakers. Apparently Nigel has been perusing “Steve’s” recent railing against NOAA’s “Red Hot Arctic” in 2016 on his “Deplorable Client Science” blog. Here’s how my conversation with Nigel went:
CryoSat-2 has burst back into life after its summer break. Here is what it reveals about Arctic sea ice thickness at the moment:
Perhaps not entirely coincidentally, the NSIDC 5 day average Arctic sea ice extent is once again less than on the same day of 2012, the year of the “record melt”:
Over on the (un)Real Science blog this morning Steve/Tony proudly explains “Why Arctic Ice Extent Is Up Over 60% In The Last Two Years“.
Needless to say we are unimpressed by the following explanation: