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In Physics Today (Oct 2013), a nice summary: "The Arctic shifts to a new normal" by Martin O. Jeffries, James E. Overland, and Donald K. Perovich
Toggle Commented Oct 2, 2013 on Pinpointing the minimum at Arctic Sea Ice
@Allen, "if we quickly stop using fossil fuels we will back away from the tipping point and things will return to say 1950 regimes." When we stop the emission tomorrow, the current trends in sea level rise and temperature change are going to continue for probably a couple of decades, just to respond to the current 400ppm CO2 level (and I am not mentioning the temp rise due to the change in aerosols when we stop emitting them). The CO2 concentration was around 310 in 1950; it is my understanding that it will take very long (>100s of years?) for nature to get us back there.
Toggle Commented Jul 31, 2013 on Second storm at Arctic Sea Ice
The IJIS graph hasn't been updated the last 2 days. Hopefully tomorrow they catch up.
Toggle Commented Jun 8, 2013 on PIOMAS June 2013 at Arctic Sea Ice
"Growth systems with significant delays in their feedback loops are virtually guaranteed to collapse." Help me understand this better - how can it be determined whether the feedback loops are slow; compared to what?
Toggle Commented May 22, 2013 on The Four Charts That Really Matter at Arctic Sea Ice
2.2 m km2 sept avg Larry, great initiative; The whole arctic seems to me to be unstable, transitioning to a new state, so and such it seems possible that we get a new minimum this year. I find it difficult to estimate the rate of re-freeze; it tends to be high in recent years. @Erimaassa - could you check the math? My calculations show 26% - not 0.026%
My thoughts went to Jim's "impossible hamster" when I read the message from our CEO that we "only experienced single digit revenue growth in Q1 - these are challenges we must overcome".
Toggle Commented May 2, 2013 on A new round of vids at Arctic Sea Ice
Andy, so it is you we hear playing the piano? That shows many talents!
Toggle Commented Apr 26, 2013 on Ice cube volume video at Arctic Sea Ice
Lodger, Thanks for explaining the Daisyworld. I was completely lost when I stumbled on that term.
Toggle Commented Apr 15, 2013 on PIOMAS April 2013 - extra update at Arctic Sea Ice
Talking about ENSO, reminds of what happened last year: “This is one of the most challenging outlooks we’ve produced in recent years because El Niño decided not to show up as expected,” said CPC deputy director Michael Halpert I wonder if they have an explanation for this?
Toggle Commented Mar 12, 2013 on The cracks of dawn at Arctic Sea Ice
I read this recently: As 21st century technology strains to become ever faster, cleaner and cheaper, an invention from more than 200 years ago keeps holding it back. It's why electric cars aren't clogging the roads and why Boeing's new ultra-efficient 787 Dreamliners aren't flying high. We need to leapfrog the engineering of making of batteries
Toggle Commented Feb 19, 2013 on Open Thread February 2013 at Arctic Sea Ice
Espen wrote (Feb 11): Lots of crushed sea ice North of Nares Strait (Kennedy / North West Greeenland), it seems to develop hour by hour: ... and it seems to me to be still developing. Is this a normal process this time of year?
Toggle Commented Feb 18, 2013 on PIOMAS February 2013 at Arctic Sea Ice
Very nice Andy! Thanks for sharing.
Yesterday I watched on NASA TV “Science Uncut: Arctic on the Edge?". I took away from it that things are changing in the arctic, and that we can expect a seasonal ice free arctic in the summer around 2100. To me, that all seems pretty far away, considering the changes in the arctic we saw in the last couple of years. Is there a disconnect between scientists and reality, or did I misunderstand the message?
Toggle Commented Feb 5, 2013 on Open Thread February 2013 at Arctic Sea Ice
@Bob "micro-solar systems installed at a rate of over 1,000 per day." And the world population growth is about 200,000 per day. That makes it a really big effort.
Toggle Commented Jan 28, 2013 on 2013 Open thread #1 at Arctic Sea Ice
Buddy - "another year or two of record setting melting on Greenland" ... I doubt something that is happening far from home that is not felt directly will trigger a change; only an empty supermarket at home, or a major river running dry close to home or anything else that is widely felt can cause a change in behavior - and only after the fact. There is no better driver in promoting fuel efficient cars then an increased price of fuel - warning of higher fuel prices just doesn't do the trick.
Toggle Commented Dec 23, 2012 on The real AR5 bombshell at Arctic Sea Ice
@Paddy, Crandles This is caused by the way these numbers are calculated. In one of the other threads out here is an in depth explanation. It is basically caused by the 15% threshold - if a grid cell has >15% of ice, the cell is considered to be 100% of ice. If that block is for 6 days (>15% of the month) filled with >15% of ice, then for the month, it counts as 100% ice. Suppose that block of ice floats from grid cell to grid cell, that single block of ice can make 5 grid cells count as 100% ice for the monthly figure. The daily figure would show 1 grid cell of 100% of ice during each day of the month. Bas.
Protege - thanks for explaining that sentence "September ice volume was about 800 km3 less than the prior minimum on September 10 2011 though this difference is within the estimated uncertainty of PIOMAS." I have always been in doubt about what "this difference" would refer to. Could you suggest a better way to put it?
Toggle Commented Oct 3, 2012 on PIOMAS October 2012 (minimum) at Arctic Sea Ice
As for the El Nino - La Nina cycle, is it expected this cycle to stay stable (and unchanged from the past) with all the changes we are seeing right now?
Talking about some of the consequences - one that I never thought of at least:
Neven, thank you for maintaining this wonderful site. It really inspires. As for the dot you added for 2012; it seems it points at 2015; shouldn't it be moved further to the left?
Bosbas is now following Neven
Sep 17, 2012
Bosbas is now following The Typepad Team
Sep 17, 2012