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Messages - MrVisible

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1
Arctic sea ice / Re: Latest PIOMAS update (June 2019)
« on: June 05, 2019, 04:55:07 PM »
Data for PIOMAS-20C is now available: http://psc.apl.uw.edu/research/projects/piomas-20c/

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Arctic sea ice / Re: 2019 sea ice area and extent data
« on: May 06, 2019, 02:55:12 PM »
NSIDC Total Area as at 5 May 2019 (5 day trailing average)  11,115,138  km2
               
Total Area         
 11,115,138    km2      
-498,816    km2   <   2010's average.
-415,648    k   <   2018
-864,760    k   <   2000's average.
         
Total Area Change   -63    k   loss
Peripheral Seas   -18    k   loss
Central Seas__   -31    k   loss
Other Seas___   -15    k   loss
         
Peripheral Seas         
Bering _______   -4    k   loss
Baffin  Bay____   -10    k   loss
Greenland____    2    k   gain
Barents ______   -6    k   loss
         
CAB Seas         
Beaufort_____   -13    k   loss
CAA_________    0    k   gain
East Siberian__   -6    k   loss
Central Arctic_    1    k   gain
         
Kara_________   -7    k   loss
Laptev_______   -3    k   loss
Chukchi______   -4    k   loss
         
Other Seas         
Okhotsk______   -9    k   loss
St Lawrence___   -3    k   loss
Hudson Bay___   -3    k   loss


Area loss 63 k, 3 k more than the 2010's average loss of 60 k on this day.
Total area still 2nd lowest (168k > 2016)

Temperatures
GFS shows temperature anomalies varying from +3 to +3.5 celsius over the forecast period. Warmth and wind have marched into the Arctic Ocean via the Pacific Gateway and into Baffin Bay from the Atlantic.

Other Stuff
GFS shows temperature anomalies varying from +2.5 to +3.5 celsius over the forecast period, with warmth over most of the Central Arctic and the CAA as far as Svalbard. Also warmth in Baffin Bay for most of the time.

2016 area is still likely to stay lowest for some time to come as it was in very strong area decline at this time.

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Arctic sea ice / Re: 2018 sea ice area and extent data
« on: November 15, 2018, 05:30:49 PM »
Not sure what to make of this all, but the ice gain over the past month is the second highest in the satellite history, with the gain over the past two weeks being the highest.  Based on current and forecast temperatures I expect this to continue in the short term.

Klondike Kat's statement in numbers:

2018 had the 2nd highest extent gain from November 1st to November 14th in satellite history. That's an impressive recovery from the very slow start of this year's freezing season.
The closer an oscillating system gets to it's boundary conditions, the greater its volatility.  That's my take away.

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Consequences / Re: Oceanic anoxia
« on: October 30, 2018, 12:34:27 AM »
Edit: self moderated to another thread

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Consequences / Re: Oceanic anoxia
« on: October 29, 2018, 07:23:13 PM »
I wonder about the suddenness of these events.  You'd think different animals would have different tolerance for hypoxia.  I suppose that once *some* animals die from hypoxia, the decomposing bodies consume more oxygen--a positive feedback effect.

Indeed they do. But I think one should worry more about the potential loss of "photosynthetically active plants and bacteria in the ocean, the primary producers. Annually, they generate about the same amount of oxygen and fix as much carbon as all the land plants together. "
https://worldoceanreview.com/en/wor-1/ocean-chemistry/oxygen/

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Consequences / Re: Oceanic anoxia
« on: October 29, 2018, 05:48:58 PM »
SteveMDFP, I believe the link below is the one you meant to post.  Indeed, it is shocking.

Coastal Pacific Oxygen Levels Now Plummet Once A Year
Quote
Scientists say West Coast waters now have a hypoxia season, or dead-zone season, just like the wildfire season.

Hypoxia is a condition in which the ocean water close to the seafloor has such low levels of dissolved oxygen that the organisms living down there die.

Crabber David Bailey, who skippers the Morningstar II, is rattled by the news. He remembers a hypoxia event out of Newport, Oregon, about a decade ago. He says it shows up "like a flip of a switch."

"It shows up like a flip of a switch," he says. "If there are crabs in the pot, they're dead. Straight up," Bailey says. And if you re-bait the pots, "when you go out the next time, they're blanks, they're absolutely empty. The crabs have left the area."

A hypoxia event will kill everything that can't swim away—animals like crabs, sea cucumbers and sea stars.

"We can now say that Oregon has a hypoxia season much like the wildfire season," says Francis Chan, co-chair of the California Hypoxia Science Task Force.  ...
https://www.npr.org/2018/10/28/658953894/coastal-pacific-oxygen-levels-now-plummet-once-a-year

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Arctic sea ice / Re: Arctic Image of the Day
« on: August 30, 2018, 11:52:45 PM »
More Polar pics:

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