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Author Topic: Glossary ... for newbies and others  (Read 103546 times)

Lewis

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Re: Glossary ... for newbies and others
« Reply #150 on: August 19, 2019, 05:13:58 AM »
Just saw this being used but not in your glossary.

AGW - Anthropogenic Global Warming

Neven

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Re: Glossary ... for newbies and others
« Reply #151 on: August 19, 2019, 01:07:43 PM »
Just saw this being used but not in your glossary.

AGW - Anthropogenic Global Warming

I believe every adult should know this one, and children after they reach age 6.  ;)
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Glen Koehler

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Re: Glossary ... for newbies and others
« Reply #152 on: February 21, 2020, 08:20:50 PM »
AMSR = Advanced Microwave Scanning Radiometer    
     AMSR-E is the AMSR instrument on board AQUA satellite (NASA), and AMSR-2 the one on board GCOM-W1 satellite (JAXA)

JAXA = Japan Aerospace eXploration Agency

OSISAF = Ocean and Sea Ice Satellite Application Facility
    Satellite Application Facility = Utilising specialist expertise from the EUMETSAT Member States, Satellite Application Facilities (SAFs) are dedicated centres of excellence for processing satellite data. They form an integral part of the distributed EUMETSAT Application Ground Segment.
« Last Edit: February 21, 2020, 10:00:31 PM by Glen Koehler »

Neven

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Re: Glossary ... for newbies and others
« Reply #153 on: February 22, 2020, 03:05:06 PM »
Added, thanks!
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Glen Koehler

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Re: Glossary ... for newbies and others
« Reply #154 on: February 24, 2020, 10:09:58 PM »
ASCAT = Advanced Scatterometer instruments on multiple satellites that use radar to measure speed and direction of winds over the surface of the oceans.

Glen Koehler

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Re: Glossary ... for newbies and others
« Reply #155 on: March 17, 2020, 03:21:54 PM »
The acronym definition for CAPIE includes an undefined acronym: IJIS

IJIS = IARC-JAXA Information System run by the International Arctic Research Center at the University of Alaska (IARC), and the Japan Aerospace Exploration Agency (JAXA).


« Last Edit: March 17, 2020, 08:07:23 PM by Glen Koehler »

Neven

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Re: Glossary ... for newbies and others
« Reply #156 on: March 18, 2020, 12:02:31 AM »
Added, thanks.
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Glen Koehler

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Re: Glossary ... for newbies and others
« Reply #157 on: May 24, 2020, 08:26:02 PM »
CR = Climate Reanalyzer

KenB

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Re: Glossary ... for newbies and others
« Reply #158 on: June 30, 2020, 06:56:27 PM »
hpa (hPa) = hectopascal, a unit of pressure
"When the melt ponds drain apparent compaction goes up because the satellite sees ice, not water in ponds." - FOoW

oren

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Re: Glossary ... for newbies and others
« Reply #159 on: June 30, 2020, 07:53:39 PM »
Added both CR and hPa.

KenB

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Re: Glossary ... for newbies and others
« Reply #160 on: July 03, 2020, 03:40:42 AM »
IMB = Ice Mass Balance
SIMB = Seasonal IMB
DTC = Digital Temperature Chain (in the context of SIMB)

(see https://ui.adsabs.harvard.edu/abs/2017AGUFM.C21B1120W/abstract)
"When the melt ponds drain apparent compaction goes up because the satellite sees ice, not water in ponds." - FOoW

oren

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Re: Glossary ... for newbies and others
« Reply #161 on: July 03, 2020, 04:40:55 AM »
Added.

Let It Go

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Re: Glossary ... for newbies and others
« Reply #162 on: July 15, 2020, 08:25:28 PM »
Im missing GAAC i see it used everywhere on the forum but no one explains what it is :'(

HapHazard

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Re: Glossary ... for newbies and others
« Reply #163 on: July 15, 2020, 08:32:51 PM »
Great Arctic Anti-Cyclone

new term this season

Ice Shieldz

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Re: Glossary ... for newbies and others
« Reply #164 on: July 15, 2020, 08:35:27 PM »
Hi LIG! The Great Arctic Anti-Cyclone is in contrast to 2012’s GAC Great Arctic Cyclone. While the GAC destroyed the ice with a persistent low pressure system the GAAC is doing it with a high pressure system - hence an anticyclone. There is ongoing debate about just how great the GAAC is in terms of what will be its net effect on the ice.

blumenkraft

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Re: Glossary ... for newbies and others
« Reply #165 on: July 15, 2020, 08:38:36 PM »
... which is caused by a persistent high-pressure zone centered over the arctic.

Edit: Oops, Ice Shieldz beat me to it! ;)

Let It Go

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Re: Glossary ... for newbies and others
« Reply #166 on: July 15, 2020, 08:50:11 PM »
Wow thanks for all the quick replies :D

HapHazard

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Re: Glossary ... for newbies and others
« Reply #167 on: July 15, 2020, 09:29:27 PM »
No prob, our primary functions are to educate others & learn ourselves, regarding what the heck is going on in the cryosphere. And the more folks who come here (posting or lurking, doesn't matter) the better. We're all stuck in the same ol' leaky lifeboat, after all. :)

oren

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Re: Glossary ... for newbies and others
« Reply #168 on: July 16, 2020, 06:41:01 AM »
GAAC added, thanks.

pearscot

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Re: Glossary ... for newbies and others
« Reply #169 on: July 16, 2020, 06:50:40 AM »
I understand GAAC, but to myself I call the current arctic high: Great Arctic High (GAH)

I only refer to it insofar as we often refer to the GAC - I feel like it's descriptive
pls!

Glen Koehler

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Re: Glossary ... for newbies and others
« Reply #170 on: July 19, 2020, 04:03:05 AM »
CONUS - Continental U.S.  Frequently used acronym in meteorology.

Tor Bejnar

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Re: Glossary ... for newbies and others
« Reply #171 on: July 19, 2020, 06:39:52 AM »
probably "contiguous" or "conterminous", as Alaska is on the continent but not part of CONUS.
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Glen Koehler

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Re: Glossary ... for newbies and others
« Reply #172 on: July 19, 2020, 04:30:42 PM »
Thanks for the correction - Conterminous United States (the lower 48)

National Weather Service - Table of Commonly Used Acronyms and Abbreviations
https://www.weather.gov/mdl/about_acronyms

oren

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Re: Glossary ... for newbies and others
« Reply #173 on: July 19, 2020, 04:45:27 PM »
Added.

Tor Bejnar

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Re: Glossary ... for newbies and others
« Reply #174 on: July 21, 2020, 05:13:36 AM »
"gice" is getting used again.  Can the term be put into the glossary and defined, please.  I really don't remember...
Arctic ice is healthy for children and other living things.

oren

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Re: Glossary ... for newbies and others
« Reply #175 on: July 21, 2020, 05:15:49 AM »
It's just the name of an internal PIOMAS file (gridded ice thickness?). Not fit for a glossary entry I think.

oren

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Re: Glossary ... for newbies and others
« Reply #176 on: July 21, 2020, 06:21:59 PM »
Convinced via PM, added...

oren

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Re: Glossary ... for newbies and others
« Reply #177 on: July 23, 2020, 06:14:52 PM »
Added AWI - Alfred Wegener Institute.

KenB

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Re: Glossary ... for newbies and others
« Reply #178 on: August 02, 2020, 06:10:53 PM »
"When the melt ponds drain apparent compaction goes up because the satellite sees ice, not water in ponds." - FOoW

oren

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Re: Glossary ... for newbies and others
« Reply #179 on: August 02, 2020, 06:42:59 PM »
CIS Added.

KenB

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Re: Glossary ... for newbies and others
« Reply #180 on: August 02, 2020, 06:59:44 PM »
CIS Added.

Lost link though?  I thought those were desired.
"When the melt ponds drain apparent compaction goes up because the satellite sees ice, not water in ponds." - FOoW

oren

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Re: Glossary ... for newbies and others
« Reply #181 on: August 02, 2020, 08:02:47 PM »
Fixed.
Don't forget, I'm new to this moderation thing...

Juan C. García

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Re: Glossary ... for newbies and others
« Reply #182 on: September 09, 2020, 04:51:03 PM »
EEI: Earth energy imbalance.

Earth's energy imbalance is the difference between the amount of solar energy absorbed by Earth and the amount of energy the planet radiates to space as heat. If the imbalance is positive, more energy coming in than going out, we can expect Earth to become warmer in the future — but cooler if the imbalance is negative. Earth's energy imbalance is thus the single most crucial measure of the status of Earth's climate and it defines expectations for future climate change.

https://www.giss.nasa.gov/research/briefs/hansen_16/#:~:text=Earth%27s%20energy%20imbalance%20is%20the,if%20the%20imbalance%20is%20negative.
Which is the best answer to Sep-2012 ASI lost (compared to 1979-2000)?
50% [NSIDC Extent] or
73% [PIOMAS Volume]

Volume is harder to measure than extent, but 3-dimensional space is real, 2D's hide ~50% thickness gone.
-> IPCC/NSIDC trends [based on extent] underestimate the real speed of ASI lost.

interstitial

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Re: Glossary ... for newbies and others
« Reply #183 on: September 09, 2020, 10:24:13 PM »
The title should just be "Glossary". New names and acronyms are created all the time.

oren

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Re: Glossary ... for newbies and others
« Reply #184 on: September 09, 2020, 10:58:15 PM »

Positive retroaction

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Re: Glossary ... for newbies and others
« Reply #185 on: September 14, 2020, 03:20:21 PM »
Hello everybody
Juste a question : what is BoE ?
Thank's
Sorry, excuse my bad english

oren

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Re: Glossary ... for newbies and others
« Reply #186 on: September 15, 2020, 04:43:30 AM »
Hello P.r. and welcome. BOE is "Blue Ocean Event", meaning the Arctic Ocean has become virtually ice-free on some date. I can't believe this was missing from the glossary...
Edit: It was there already. Phew.

kassy

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Re: Glossary ... for newbies and others
« Reply #187 on: September 15, 2020, 01:04:09 PM »
Although it is missing the actual technical definition of ice area under 1 million square kilometers.
Þetta minnismerki er til vitnis um að við vitum hvað er að gerast og hvað þarf að gera. Aðeins þú veist hvort við gerðum eitthvað.

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Re: Glossary ... for newbies and others
« Reply #188 on: September 15, 2020, 01:06:43 PM »
Although it is missing the actual technical definition of ice area under 1 million square miles.
I thought it was one million square kilometers.
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kassy

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Re: Glossary ... for newbies and others
« Reply #189 on: September 15, 2020, 01:09:39 PM »
Oops fixed... (background song singing about miles lol).
Þetta minnismerki er til vitnis um að við vitum hvað er að gerast og hvað þarf að gera. Aðeins þú veist hvort við gerðum eitthvað.

Positive retroaction

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Re: Glossary ... for newbies and others
« Reply #190 on: September 15, 2020, 02:30:42 PM »
Thank's for all your answers!
Sorry, excuse my bad english

Tor Bejnar

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Re: Glossary ... for newbies and others
« Reply #191 on: September 15, 2020, 04:07:03 PM »
I though BOE was a distinctly different concept from 'virtually ice-free'.  Because of several scientific publications, 'virtually ice-free Arctic' or 'ice-free Arctic' got defined as 'less than 1 million km2 of Arctic sea ice extent'.

An internet search shows BOE having the same definition, but some on these threads have suggested different definitions, something like, 'when the DMI 80N summer temperature really spikes' or 'when sea ice area is under 50K km2' or something.

Maybe we should have a poll!  [What is the best definition of "BOE - Blue Ocean Event - given that "ice-free" uses "less than 1 million km2 of ice extent"?  Should it be the same?]  A little discussion somewhere should be had before a poll goes up (if at all), I think...  Moderators ...?  [This is called, 'passing the buck.']
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be cause

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Re: Glossary ... for newbies and others
« Reply #192 on: September 15, 2020, 04:13:43 PM »
I'm happy with the < 1 million sq km measure . 50k might just about equal the coastal false ice . b.c.
2007 + 5 = 2012 + 4 = 2016 + 3 = 2019 + 2 = 2021 
 (phew)

Neven

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Re: Glossary ... for newbies and others
« Reply #193 on: September 15, 2020, 05:14:50 PM »
My impression is that BOE is a relatively recent term, but I can't remember who came up with it (Beckwith?). My opinion is that if there still is ice left, the ocean isn't blue. BOE to me means completely ice-free.
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binntho

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Re: Glossary ... for newbies and others
« Reply #194 on: September 16, 2020, 07:28:56 AM »
BOE stands for "Blue Ocean Event", and the inclusion of the word "Event" indicates something that can neither be fractional nor partial nor continuous with previous or later states, nor can it really be defined as when some specific measure drops below some arbitrary line.

A proper use of the term BOE would indicated the first time all ice disappears. It cannot really be used to describe the first time ice goes under 1Mkm2 simply because the day that happens will be no different from the day before or the day after. Going under 1Mkm2 is an arbitrary point on a continuum, not an event in real-world terms.

Same goes for this strange use of the term "partial" or "fractional" BOE. There is no such thing as a partial event.

I'm not sure about the history of BOE as a concept, but I remember a few years back when a lot of people become excited about a hypothetical future BOE with several of them claiming that following BOE, ice would not regenerate and the Arctic would flip into a new regime, a tipping point of epic proportion. This line of argument is obviously using BOE to mean "when all ice disappears".

Further to the earlier discussions on BOE were claims that the world as we know it would end shortly afterwards - not only the Arctic but the entire planet would have reached a catastrophic tipping point. Again this line of discussion does not allow for a definition of BOE as meaning "going under 1Mkm2".

I remember reading for the first time some years ago the suggestion that BOE be re-defined as "virtually ice free", and to use the apparently widespread definition of under 1Mkm2 as the arbitry limit.  I didn't think much of it at the time.

Buit this confusion of terms is becoming increasingly unfortunate in my mind. People are really talking about VIF (virtually ice free) which is not an event. Thus using terms such as "partial VIF" is reasonable, while "partial BOE" is nonsense. This confusion of BOE with VIF also makes impossible all speculation and discussion of tipping points or sudden and epic systemic changes following BOE - which I don't really believe in, but other people do, and it would be silly for them to try and come up with new terms because some lazy scientists have stolen BOE - are we to start talking about TIFE (totally ice free event) instead?

BOE is an event, something that happens clearly and is easily definable and discernible, and defendable as well. Nobody is going to claim any major changes to the Arctic just because at some hypothetical point in the future, ice extent drops to the 990.000km2s for a few days. That would be laughable, and totally negate the whole idea behind the term BOE.

So i would suggest to stop using BOE as a tag for "virtually ice free". and start using VIF instead. And that the rest of us start to think about how to actually discern when this Event takes place, I personally like the idea of FMI 80N lift-off being the unmistakable sign of a BOE.

<Don't make it personal. O>
« Last Edit: September 16, 2020, 07:14:32 PM by oren »
because a thing is eloquently expressed it should not be taken to be as necessarily true
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P-maker

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Re: Glossary ... for newbies and others
« Reply #195 on: September 16, 2020, 09:41:35 AM »
Binntho & Neven,

To some extent, I do agree that the use of "BOE" ought to become less popular as time goes by.

However, I would like to describe a few scenarios, which may come under a proposed new heading: Virtually Ice-free Arctic (VIA).

Oct All remaining ice (<1 Mkm2) has been blown to the Beaufort Sea due to incoming heat advection from active hurricanes in the Atlantic Sector.

Dec All new ice (< 1 Mkm2) has formed along the Siberian and North American coastlines due to astronomical cooling of the two continents - spilling over into the nearby freshwater bays/ shelf areas.

Feb All FYI (<1 Mkm2) has accumulated on the windward side of all Arctic Islands, including Svalbard, FJL, NZ, SZ, NSI, Wrangel, CAA & Greenland.

Apr All SYI (< 1 Mkm2) has been blown out of the Arctic Basin and remains in the Greenland Sea as an extension of the Greenland cold pole.

Jun All remaining ice (< 1 Mkm2) is stuck between the islands of the CAA - refusing to let go of tradtional strongholds in the narrow sounds & straits and permanently frozen islands.

Aug Any remaining ice (< 1 Mkm2) will be floating around in the Arctic Basin proper as a coherent clump of detached iceberg fragments, shelf ice left-overs, MYI remnants and FYI slush - openly exposed to the vagaries of wind and currents.

No responsibility for what happens in between the months listed above.

NigelC

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Re: Glossary ... for newbies and others
« Reply #196 on: September 16, 2020, 11:23:54 AM »
Long time lurker. First time posting.

We have two phrases. 'Virtually ice free' and 'Blue ocean event'. It seems to me that to be of use they should mean different things.

'Virtually ice free' means less than 1,000,000 square kilometres of ice at minimum.

So f we want to use BOE it should mean something different. The word 'event' means something that happens at a specific time and place. I think it should mean the occasion when someone takes a non satellite  photo of the north pole with no ice in sight. Literally a blue ocean.  Ideally the photo would feature a ship at the north pole under a sunny sky with no ice in sight to the horizon. Such a photo would, I believe, be widely reproduced in the mainstream media and would be instrumental in raising public awareness about arctic ice loss.

oren

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Re: Glossary ... for newbies and others
« Reply #197 on: September 16, 2020, 11:27:13 AM »
Welcome, NigelC.
Can someone suggest where to move this interesting but OT conversation?

binntho

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Re: Glossary ... for newbies and others
« Reply #198 on: September 16, 2020, 11:31:22 AM »
because a thing is eloquently expressed it should not be taken to be as necessarily true
St. Augustine, Confessions V, 6

Glen Koehler

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Re: Glossary ... for newbies and others
« Reply #199 on: October 03, 2020, 07:24:47 PM »
CAS = Central Arctic Sea.  Used by NSIDC.  Which gerontocrat tells us is 3.2 km2 less than the CAB.  JAXA uses CAB right?