neven

Recent Articles

ASI 2016 update 5: big cyclone

During the melting season I'm writing (bi-)weekly updates on the current situation with regards to Arctic sea ice (ASI). Because of issues with data based on the SSMIS sensor aboard DMSP satellites, I mainly focus on higher-resolution AMSR2 data from…
This article was posted in Blogs.

1000 Forum members

As Arctic sea ice declines, more and more people learn about it and want to know more. It explains the relative success of this blog ever since its inception in 2010. The spectacular, iconic image of Arctic sea ice loss,…
This article was posted in Blogs.

PIOMAS August 2016

Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center: With a slightly above average drop during July…
This article was posted in Blogs.

2016 SIPN Sea Ice Outlook: July report

The second Sea Ice Outlook of this year has been published. The SIO is organized by the Sea Ice Prediction Network (as part of the Arctic research program 'Study of Environmental Arctic Change', or SEARCH), and is a compilation of…
This article was posted in Blogs.

ASI 2016 update 4: breaking point

During the melting season I'm writing (bi-)weekly updates on the current situation with regards to Arctic sea ice (ASI). Because of issues with data based on the SSMIS sensor aboard DMSP satellites, I mainly focus on higher-resolution AMSR2 data from…
This article was posted in Blogs.

Iced lightning

From a children's book: "In The Legend of Lightning and Thunder, a traditional legend that has been told in the Kivalliq region of Nunavut for centuries, two siblings resort to stealing from their fellow villagers, and inadvertently introduce lightning and…
This article was posted in Blogs.

2016 melting momentum, part 3

Melting momentum, it's what I call the absorption of heat and solar radiation during May and June that does not directly lead to melt and a reduction in ice cover, but rather comes into play during July and August (I had…
This article was posted in Blogs.

PIOMAS July 2016

Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center: As expected after a month of stalling sea…
This article was posted in Blogs.

2016 SIPN Sea Ice Outlook: June report

The first Sea Ice Outlook of this year has been published. The SIO is organized by the Sea Ice Prediction Network (as part of the Arctic research program 'Study of Environmental Arctic Change', or SEARCH), and is a compilation of…
This article was posted in Blogs.

ASI 2016 update 3: crunch time

During the melting season I'm writing (bi-)weekly updates on the current situation with regards to Arctic sea ice (ASI). Because of issues with data based on the SSMIS sensor aboard DMSP satellites, I mainly focus on higher-resolution AMSR2 data from…
This article was posted in Blogs.

2016 melting momentum, part 2

Happy Solstice, everyone! Credit: NASA/Kathryn Hansen The previous post on melting momentum was running long, so here's an addition dealing with compactness, the final piece of information we have to assess the amount of melting momentum. Just before the start…
This article was posted in Blogs.

2016 melting momentum, part 1

Melting momentum, it's what I call the absorption of heat and solar radiation during May and June that does not directly lead to melt and a reduction in ice cover, but rather comes into play during July and August (I had…
This article was posted in Blogs.

ASI 2016 update 2: closing the gap

During the melting season I'm writing (bi-)weekly updates on the current situation with regards to Arctic sea ice (ASI). Because of issues with data based on the SSMIS sensor aboard DMSP satellites, I mainly focus on higher-resolution AMSR2 data from…
This article was posted in Blogs.

PIOMAS June 2016

Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center:   As you can see, as of May…
This article was posted in Blogs.

Persistent Arctic and sub-Arctic warmth

There are a couple of reporters out there who write really good articles about the Arctic, and Alaska Dispatch News' Yereth Rosen is one of them. Just a couple of days ADN published this article of hers on the extreme…
This article was posted in Blogs.

Crisis in the Cryosphere

I recently received an e-mail to draw my attention to a recent two-part feature article on the Scientific American website by Dr. John J. Berger, an independent energy and environmental consultant. The article called Crisis in the Cryosphere is about…
This article was posted in Blogs.

ASI 2016 update 1: both sides

During the melting season I'm writing (bi-)weekly updates on the current situation with regards to Arctic sea ice (ASI). Because of issues with data based on the SSMIS sensor aboard DMSP satellites, I mainly focus on higher-resolution AMSR2 data from…
This article was posted in Blogs.

Beaufort Gyre guest blog

Not an update of current conditions in the Beaufort Sea, but some science for your reading pleasure. This is a guest blog by Alek Petty, a postdoc at NASA’s Goddard Space Flight Center and the University of Maryland, specializing in…
This article was posted in Blogs.

Beaufort final update

This isn't a final update as such, because I will certainly be mentioning events in the Beaufort Sea in upcoming ASI updates. But it is the last in a series of blog posts I have written (one, two and three)…
This article was posted in Blogs.

PIOMAS May 2016

Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center: According to my contact at the PSC the…
This article was posted in Blogs.

Beaufort under relentless (high) pressure

When I wrote the Beaufort under early pressure blog post last month, I didn't quite expect this unprecedented pressure (timing and magnitude) to keep up for so long. High pressure areas tend to be short-lived in the Arctic, but this…
This article was posted in Blogs.

EGU2016, my impressions

Just like last year, I had the opportunity and time to visit the European Geosciences Union General Assembly 2016. There were several sessions on subjects related to the cryosphere and remote sensing, but most of the interesting Arctic sea ice-related…
This article was posted in Blogs.

Cryosat-2 confirms: sea ice volume is low

Last month I made a comparison of CryoSat-2 sea ice volume distribution maps for the 2015/2016 Winter analysis, but it was off because the dates didn't exactly match. Better images have emerged during this year's General Assembly of the European…
This article was posted in Blogs.

Meanwhile, on the other side

Lately the focus has been on the Beaufort Sea where a high-pressure area has caused the ice pack to crack on a massive scale, even earlier than in previous years, with ice being transported away from the North American coast…
This article was posted in Blogs.

Beaufort quick update

It's been a week since I announced that the ice in the Beaufort Sea was going to come under early pressure. Here's a quick update on what has happened so far, how the forecast played out, and what the short-term…
This article was posted in Blogs.

Greenland under early pressure too

When I posted that weather forecast for the Arctic in the Beaufort under early pressure blog post a few days ago and said very large anomalies are forecast for Greenland and Baffin Bay, it didn't really occur to me just…
This article was posted in Blogs.

The Arctic is not an adventure playground

Some of you may already have heard about how this year a cruise ship called Crystal Serenity is going to sail the Northwest Passage with more than 1000 guests. Prices range from $22,000 to $121,000 dollars per passenger (drinks included). Here's…
This article was posted in Blogs.

Beaufort under early pressure

A high-pressure area has been moving in over the Beaufort Sea lately. It's quite big and quite high in pressure. Environment Canada has the current pressure there at 1042 hPa: I've coloured the land masses to make it easier to…
This article was posted in Blogs.

PIOMAS April 2016

Another month has passed and so here is the updated Arctic sea ice volume graph as calculated by the Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) at the Polar Science Center: After an increase of 1742 km3 during March…
This article was posted in Blogs.

Winter analysis addendum

A couple of things were missing from the 2015/2016 winter analysis posted a few days ago, and so I've decided to present them in this separate blog post. Most of these images come from the website of NSIDC research scientist…
This article was posted in Blogs.