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THE Ozone Thread (merged)

Re: Arctic ozone shield -40%

Unread postby Whitefang » Tue 12 Apr 2011, 08:57:36

P.D.Ward fellow mentions fossil damage by UV light........page 118 from under a green sky....mmmmm things are speeding up no doubt. If only we had all the time in the world.
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Re: Arctic ozone shield -40%

Unread postby dohboi » Tue 12 Apr 2011, 11:25:20

Thanks for the reference. That's one of my favorite true-life-horror books. I wonder when they will make it into a movie? :roll:
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Re: Arctic ozone shield -40%

Unread postby M_B_S » Fri 15 Apr 2011, 01:38:21

A new study shows the possible positve climate feedback from a big ozon hole


A big ozon hole => death of phytoplankton => smaller DMS output => fewer clouds => more global warming

http://www.agu.org/pubs/crossref/2011/2 ... 3850.shtml

http://www.csa.com/discoveryguides/dime ... erview.php

=> James Lovelook: The Revenge of Gaia

http://en.wikipedia.org/wiki/Gaia_hypothesis

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Re: Arctic ozone shield -40%

Unread postby ritter » Fri 15 Apr 2011, 10:54:30

Yippy skippy. This sucks.
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Re: Arctic ozone shield -40%

Unread postby dohboi » Sat 16 Apr 2011, 00:59:46

Thanks, mbs--I'll add that to my feedback (aka death spiral) inventory.
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Re: Arctic ozone shield -40%

Unread postby M_B_S » Fri 17 Jun 2011, 01:07:12

Whales Suffering From Sunburn
Whales are continuously exposed to the sun and are now suffering skin damage as ultraviolet radiation increases.

http://news.discovery.com/animals/whale ... ozone.html
Painful sunburns are usually associated with people, but many whales are now acutely sunburned, with cases escalating in recent years, according to new research.

The study, published in the Proceedings of the Royal Society B, is the first to demonstrate that sun damage to whale skin is on the rise and is likely tied to increasing levels of ultraviolet radiation resulting from the thinning ozone layer.
*********************************************************************************

This new study is a new proof that something is wrong with our arktic ozon shield.

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Re: Arctic ozone shield -40%

Unread postby meemoe_uk » Fri 17 Jun 2011, 04:27:08

MBS, the simple 10 second truth that you'll never allow yourself to know.
Earth's Ozone layer is created by the sun's ultra violet rays reaction with Earth's atmospheric oxygen. If these rays subside, then since ozone has a short half life, the ozone layer depletes.
The sun has recently become less active all round, with ultraviolet rays particularly reduced. Therefore we are losing the ozone layer. It's a self regulating system. There's no significant manmade variation in the ozone layer.
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What Happened To The OZONE HOLE?

Unread postby peeker01 » Mon 11 Jul 2011, 18:50:23

ever wonder what happened to the ozone hole controversy? watch this video and you
will find out. 50 billion spent on cfc changeover, and 2006 was the biggest hole to date.

http://www.youtube.com/watch?v=taTzqRHNIEc
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Re: What Happened To The OZONE HOLE?

Unread postby peeker01 » Mon 11 Jul 2011, 21:56:24

you'll have to draw your own conclusions.....i just report the news. sorry pee, i've broken the
code :-D
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Re: What Happened To The OZONE HOLE?

Unread postby timmac » Mon 11 Jul 2011, 22:15:43

peeker01 wrote:ever wonder what happened to the ozone hole controversy? watch this video and you
will find out. 50 billion spent on cfc changeover, and 2006 was the biggest hole to date.

http://www.youtube.com/watch?v=taTzqRHNIEc


The hole did not seem much bigger in 2007 compared to 1979, 2002 showed the hole the smallest, even smaller than 79 ??..

Looks as if 50 billion spent on a hole that just ate the money and nothing changed ??

:shock:
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Re: What Happened To The OZONE HOLE?

Unread postby lowem » Tue 12 Jul 2011, 02:52:06

All I know is that we switched away from R12 refrigerant. And with a nice discussion going on here, about 4 years ago when there was probably a bit more interest in the subject.

Now to bring on some peak oil doom 8O
Live quotes - oil/gold/silver
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Nature: Dramatic Increase in Arctic Ozone Hole

Unread postby dohboi » Wed 05 Oct 2011, 20:47:19

Washington Post
The record-breaking Arctic ozone “hole” and global warming
According to research published in the journal Nature this week, the largest ozone “hole” on record above the Arctic opened up last winter, exposing residents of the Far North to high doses of harmful ultraviolet (UV) radiation, which can cause skin cancer and cataracts. The area of severe ozone loss extended southward from the Arctic to cover populated areas in northern Russia, Greenland and Norway....

the observation of an Arctic ozone hole – which, while smaller than the Antarctic ozone hole, was comparable to it in terms of the amount of ozone lost – is surprising, and demonstrates that human actions can have unforeseen ripple effects for many years.

In the Arctic, the stratosphere – which is the layer of atmosphere above the troposphere, where most weather occurs – tends to be too mild for ozone depletion to progress to the same extent that it does during the Antarctic winter.

However, something odd happened during the winter of 2010-2011, according to the new study. The period of extreme cold in the upper atmosphere lasted more than a month longer than during any previously studied Arctic winter. The key reason for this was an unusually strong polar vortex, which is a cyclonic circulation of air in the upper levels of the atmosphere. Typically, the polar vortex is weaker in the Arctic than it is in the Antarctic.

“What was different about this year was that the temperatures were low enough to generate ozone-depleting forms of chlorine for a much longer period of time,” said study coauthor and University of Toronto physicist Kaley Walker in a press release.

Although the precise causes of the unusually cold stratosphere and extreme ozone depletion last winter are unclear, global warming is one factor that may be involved.

Last edited by Ferretlover on Tue 10 Jan 2012, 22:02:13, edited 2 times in total.
Reason: Shortened long URL.
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Re: Nature: Dramatic Increase in Arctic Ozone Hole

Unread postby dissident » Thu 06 Oct 2011, 14:47:47

This is interesting. It could be tied to the "break down" of the tropospheric polar front jet last winter. The state of the stratospheric polar vortex (aka polar night jet) reflects the distribution and intensity of Rossby wave fluxes into middle and high latitudes of the stratosphere from the troposphere. These planetary scale waves are dissipated through radiative transfer and nonlinear circulation effects and produce a "dynamical heating". So more Rossby wave "drag" means a weaker polar vortex and warmer temperatures in the polar stratosphere.

Changes in the tropospheric circulation affect the latitudinal distribution of the Rossby wave flux. Rossby waves travel along great circles and for the most part head equatorward as they propagate upward. The polar front jet is baroclinically unstable and emits synoptic scale edddies (Rossby waves in the nonlinear regime); these eddies/waves interact and lead to the emission of longer wavelength Rossby waves (ones which can penetrate into the stratosphere, smaller scale waves cannot penetrate into the large amplitude westerly winds of the stratosphere during winter).

The polar front jet was very weak in early winter of 2010/11 due to the polar warming associated with process such as Arctic sea ice loss (it took a long time for the Arctic sea ice to re-form last winter). The strength of zonal jets depends on latitudinal temperature gradients (so a warmer polar cap means weaker jet). The state of the Arctic stratospheric vortex is determined in November and December as it develops. Less wave drag at this stage implies a stronger vortex later in winter (if wave drag succeeds in damping the zonal winds sufficiently, there is more Rossby wave penetration and more damping, and so on). There are also years with so-called sudden stratospheric warmings, and a major one did not develop last winter.

So there is more than just a feeling to back up the idea that this is AGW related.
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Re: Nature: Dramatic Increase in Arctic Ozone Hole

Unread postby Whitefang » Sun 09 Oct 2011, 04:42:56

That Ozone hole should increase UV radiation by 70 times, would that help melting the remnants of summer ice 2012?
Bottom could drop out, sunspots increasing........methane going abrupt 30 Gton or so.
Could lead to sudden 10 degrees jump in arctic avarage temperature, then collapse of about everything we know.

Impact of a reduced Arctic sea-ice cover on ocean and atmospheric properties
Jan Sedláček, Reto Knutti, Olivia Martius and Urs Beyerle

I have still not found a good reading on the impact of an ice free arctic on global weather, dammit.
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Re: Nature: Dramatic Increase in Arctic Ozone Hole

Unread postby dohboi » Sun 09 Oct 2011, 10:10:51

"methane going abrupt 30 Gton or so.
Could lead to sudden 10 degrees jump in arctic avarage temperature, then collapse of about everything we know."

This is what many of us are afraid has already begun.

I hadn't thought about the effect of the UV on ice in the Arctic. Wouldn't these shorter wave lengths penetrate deeper into the water and affect the seabed clathrates more powerfully? Another exacerbating feedback?

I have seen at least one study on the effect of a (nearly) ice free Arctic directly on the climate of the Northern Hemisphere, but I can't find the link now. We also need some modeling of the effect on sea currents which can have a strong secondary effect on climate.
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Re: Nature: Dramatic Increase in Arctic Ozone Hole

Unread postby dohboi » Sun 09 Oct 2011, 21:34:29

OK, whitefang, it's a couple years old, but here is a pdf of a study on the influence of changes in Arctic sea ice cover on atmospheric circulation:

http://www.arctic.noaa.gov/future/docs/ArcticAND_Globe.pdf

This seems to be the most relevant part of the summary/conclusion:

In the Atlantic sector the large-scale atmospheric response generally resembles the internal mode of atmospheric variability, the NAO/AO, the interaction between Arctic sea ice and the overlying atmosphere being governed by a negative feedback mechanism. In the Pacific sector sea ice anomalies excite large-scale Rossby wave trains with the sea ice–atmosphere interaction being governed by a positive feedback mechanism. The response of the climate in remote areas has been demonstrated to be controlled by linear dynamics with respect to the size of the forcing but nonlinear mechanisms with respect to the forcing's direction. These distinct responses help define the specific geographic distribution of resulting anomalies in surface weather conditions such as air temperature and precipitation regimes, and storm track activity.


Searching under the author's name and those of articles he references* might get you more recent studies.

There was a study (that I can't track down right now) a few years back that predicted, not surprisingly, that snow fall would increase in the Northern Hemisphere as the Arctic Ocean remains more and more ice-free later and later into the fall--more evaporation leading to more precipitation.

[Edit--I think this was it :http://journals.ametsoc.org/doi/abs/10.1175/2009JCLI3053.1?journalCode=clim
From the abstract:

he loss of Arctic sea ice is greatest in summer and fall, yet the response of the net surface energy budget over the Arctic Ocean is largest in winter. Air temperature and precipitation responses also maximize in winter, both over the Arctic Ocean and over the adjacent high-latitude continents. Snow depths increase over Siberia and northern Canada because of the enhanced winter precipitation. Atmospheric warming over the high-latitude continents is mainly confined to the boundary layer (below 850 hPa) and to regions with a strong low-level temperature inversion. Enhanced warm air advection by submonthly transient motions is the primary mechanism for the terrestrial warming. A significant large-scale atmospheric circulation response is found during winter, with a baroclinic (equivalent barotropic) vertical structure over the Arctic in November–December (January–March). This response resembles the negative phase of the North Atlantic Oscillation in February only. Comparison with the fully coupled model reveals that Arctic sea ice loss accounts for most of the seasonal, spatial, and vertical structure of the high-latitude warming response to greenhouse gas forcing at the end of the twenty-first century.
]

This is indeed an important area. Right now I don't have any more time to look into it, but maybe later this week.

*Rinke, Royer, Singarayer, Slonosky,Wang, Zhang, X. (and Wiese if you read German) and those that worked on articles they are the first authors on might be some places to start.

http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0870.2009.00421.x/full
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Re: Nature: Dramatic Increase in Arctic Ozone Hole

Unread postby Whitefang » Mon 10 Oct 2011, 08:43:01

Thanks D, I am very curious on upcoming events, even started playing the game "The fate of the world, tipping point" by Red Redemption........onn sale right now, trying to save the world from going under........hihi

http://fateoftheworld.net/


German is fine, there must be some eurolanders looking up at freaky weather.
The Dutch could use some help building an ark or two.........2012....we were warned.
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Re: Nature: Dramatic Increase in Arctic Ozone Hole

Unread postby dohboi » Tue 11 Oct 2011, 05:13:37

Here's another little something for you, wf:

http://www.huliq.com/10282/weather-freakish-remainder-2011-due-massive-global-warming

Weather "freakish" for remainder of 2011 due to massive global warming

The melting Arctic is a ticking time bomb for the Earth’s climate – and thanks to the world’s failure to reduce greenhouse-gas pollution, the fuse has already been lit -- with scientists also warning that a warmer Arctic will produce more dangerous and “freakish” weather worldwide in 2011 and 2012.
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