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Arctic sea ice / Re: The 2019 melting season

« on: June 20, 2019, 03:59:29 PM »

As others have said

This is going to happen at peak.

A question on the graph.  Intuitively, it seems like the 60 degree line should be in between the 90 and 30 degree lines.   Why is the 60 degree isolation lower than 30?

The impact of longer daylight hours is greater than the impact of the sun's lower angle on the heat per square metre on the surface. The brainiacs have produced loads of standard tables on it.

I tried doing some work on that but my brain said "you aren't a pure maths undergrad anymore". (And anyway I spent far too much time in the bar and the snooker room).

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Arctic sea ice / Re: The 2019 melting season

« on: June 03, 2019, 04:30:30 PM »

 The Beaufort gyre ice destroyer is up and running, the bottom melt caused by all that +1 degree water is telling already. If the high pressure holds the Beaufort could be at 2-3 degrees in a week. I just hope we don't get a replay of 2012 when you can see big old ice floes disintegrate in days after being swept into water at 8 degrees.

 Below is a picture comparison between May 27th and June 2nd. I wonder just how much bottom melt there was in this de compacted pack last month?

(edit)

 I'll answer my own question here https://cryospherecomputing.tk/SIT.html and it's worse than I expected.

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Policy and solutions / Re: Electric cars

« on: May 16, 2019, 03:36:28 PM »

FrostKing70, you want to look into AC and DC charging.

For example, the Renault Zoe is fast at AC (22KW). On the other hand, the Hyundai Kona is faster (50KW) and does DC charging.

Depending on what car you get, you'll need a wallbox accordingly. With most wallboxes/cars you can charge your car fully overnight. An electrician has to install it.

Edit: Added screenshot Kona charging methods.

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Science / Re: 2019 Mauna Loa CO2 levels

« on: May 15, 2019, 07:57:00 AM »

Atmospheric carbon dioxide sets a new record every year. This year’s cracked the ominous milestone of 415 parts per million (ppm) thanks to ever rising emissions from human activities. The sharp rise might seem like something nobody could’ve predicted but there’s at least one group of scientists that were on the money 37 years ago: Exxon’s ace team of scientists.

Link >> https://earther.gizmodo.com/exxon-predicted-2019-s-ominous-co2-milestone-in-1982-1834748763

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Permafrost / Re: Arctic Methane Release

« on: May 07, 2019, 11:15:16 PM »

This was mentioned in the Greenland thread.  As I thought about it, I wondered if there would be a positive feedback loop with the methane release:

Greenland melts causing less gravitational pull on the waters near Greenland, the sea level drops lower, which results in the warmer surface water being closer to the seabed, then seabed warms faster, which releases methane, causing Greenland to melt faster (and repeat!?!)

https://climate.nasa.gov/news/2626/evidence-of-sea-level-fingerprints/

A very good question. If the seabed becomes shallower even this alone could cause some methane release due to removal of water pressure, plus a shorter water column.
Some of the continental shelf could become completely exposed, depending on the bathymetry near Greenland. Again, methane implications.
I should point out that this is a very long process, and could play over centuries.

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Policy and solutions / Re: Carbon Capture and Storage (CCS)

« on: May 03, 2019, 04:42:19 PM »

Renewables ‘Have Won the Race’ against Coal and Are Starting to Beat Natural Gas

By Joe Romm, originally published by Climate Progress (April 4, 2019)

… according to a report released this week by Bloomberg New Energy Finance (BNEF).

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Arctic sea ice / Re: Latest PIOMAS update (March)

« on: April 19, 2019, 05:40:20 PM »

PIOMAS Volume as at 15 April  22,459 KM3.

Here is the volume data presented in the same format as I use for the JAXA ice extent tables and graphs. Down from 4th lowest (31 March) to 3rd lowest in the satellite record.

On average, maximum on 22nd April. Using average remaining gain over the 2010's years would give a maximum of 22,488 km3, 3rd lowest in the satellite record.

The next post will be looking at the melting season, I presume (too much?).

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Policy and solutions / Re: Solar Roadways

« on: January 25, 2019, 05:35:33 PM »

”...what Solar Roadways has accomplished over the past, say, 12 years or so. ...

LOL.  Edison spent years finding 1,000 ways to not make a light bulb... before finding one that did.

Solar Roadways new Version 4 panels are scheduled to go into production by the end of this month.  Let’s see how they fare.

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Arctic sea ice / Re: The 2018/2019 freezing season

« on: November 25, 2018, 03:52:21 PM »

A comparison of Chukchi ice extent from 2015-2018, nov1-24 using amsr2-uhh.
The main ice edge for each year from 2015-2017 has been extracted using edge detect in imagej, then splitting the colour channels to remove some of the concentration data, so it should be seen only as a rough comparison.

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Arctic sea ice / Re: The 2018 melting season

« on: September 05, 2018, 11:32:33 AM »

What happened to the predictions of a GAC from the last week of so?

My latest "GAC 2018" update:

http://GreatWhiteCon.info/2018/08/the-great-arctic-cyclone-of-2018/#Sep-05

Feel free to debate whether it merits the “Great” prefix, but this is how the early September 2018 Arctic cyclone has panned out. According to this morning’s Environment Canada synopsis the cyclone is centred near the coast of the Laptev Sea and is down to a MSLP of 977 hPa.

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Consequences / Re: Hurricane season 2018

« on: May 24, 2018, 10:04:21 PM »

I am curious why we don't see tropical systems in the two areas shown on the attached.  Why everywhere else there is open water far enough away from the equator to generate spin, but not here?

More here, in case you missed it:
https://forum.arctic-sea-ice.net/index.php/topic,2237.msg153567.html#msg153567

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Greenland and Arctic Circle / Re: The Nares Strait thread

« on: March 23, 2018, 08:43:47 PM »

And in addition to what Tor has just said, the fast ice on the Canadian side gets some much needed shelter in the lee of the two promontories (marked). Bearing in mind that the current is moving NE to SW on that side. Moving quite fast too. Look at today's image and see how far the chunk has moved down the strait.

The original arch to the north is visible too in this image.

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Greenland and Arctic Circle / Re: The Nares Strait thread

« on: March 23, 2018, 08:21:42 PM »

The water current in Kane Basin and Smith Sound is stronger on the Canadian side.  (On the Greenland side, there is some north-bound current).  I think, therefore, water (and abrasive ice chunks) scour the west side of Nares Strait.  The fast ice on the 'chunky' north and east sides breaks where it may, often between and around frozen-in floes, and nothing challenges its ruggedness.

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