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Please use this thread for data, stats and summaries. No discussion allowed in this thread.

Many thanks.

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Here’s a list of some data sources people may be interested in.

First off, the Arctic Sea Ice Graphs page.

This has loads of graphs, images and charts from different groups and individuals. It will have most sea ice measures you’ll need, as well as some Arctic weather and ocean data and links to much more info, some which will appear below. https://sites.google...icseaicegraphs/

The main sea ice monitoring pages are here. They will often have links to other data, and some numbers available to download so you can do your own analysis.

NSIDC http://nsidc.org/arcticseaicenews/

IJIS http://www.ijis.iarc...aice_extent.htm

Cryosphere Today http://arctic.atmos....edu/cryosphere/

PIOMAS (Volume) http://psc.apl.washi...volume-anomaly/

MASIE http://nsidc.org/data/masie/

The MODIS Arctic Mosaic Satellite Imagery

This updates daily and goes back to March 2009. Is composed of numerous images taken from passes of the AQUA and TERRA satellites, which are then stitched together to generate 2 whole Arctic images daily. http://rapidfire.sci...12256.terra.4km

MODIS Composite

Coming from the MODIS mosaic imagery, the Canadian Ice Service combine 7 days worth of mosaic images to create a composite chart. Very handy for seeing through the clouds! http://ice-glaces.ec...=10110&Lang=eng

Weather and SST data

DMI

Arctic Sea Surface Temperatures http://ocean.dmi.dk/...te/index.uk.php

Temperatures North of 80N http://ocean.dmi.dk/...meant80n.uk.php

NCEP Reanalysis

This is very useful when looking at climate and weather over the Arctic. You can generate maps of numerous variables, and lots of timescales. Browse around the site, there’s an enormous volume of data available.

Daily http://www.esrl.noaa...composites/day/

Monthly http://www.esrl.noaa...es/printpage.pl

North Pole Webcam

http://www.arctic.no...gallery_np.html

Sea Ice Forecasts

ARCUS Sea Ice Outlook

Takes contributions from experts and the public to create a prediction of the September mean sea ice extent, as well as other ice measure, regional trends and overviews on recent weather conditions and how they affected the ice.

http://www.arcus.org...tlook/index.php

Research

The Cryosphere Journal

Deals exclusively with the cryosphere and is open access, so all papers are free to view

http://www.the-cryosphere.net/

If anyone has any extra links they think should be added, or ideas on how to arrange everything better, just send me a pm!

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An overview on the week just passed.

(I'll continue to use the NSIDC extent for this as it's more consistent than the IJIS data)

The NSIDC extent has continued to fall, and the 1 day mean is now 792,000km2 below the previous minimum, with the 5 day mean now 633,000km2 below the 2007 record. The current daily anomaly with regards the 79-11 average is now at ~2,927,000km2.

The average daily change over the last week was about -15,600km2/day, compared to the 79-11 average of -1,300km2.

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The long term average daily change for the next 7 days is around +24,800km2/day. So unless we begin to see a turn around soon, the anomaly may climb over 3 million km2 during the next week.

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Latest update based on the NSIDC extent.

The extent began it's annual climb again this week. The current 1 day extent is now at 3,651,300km2, while the 5 day mean is 3,576.000km2

The current daily anomaly is now down to 2,818,000km2, up from 2,927,000km2 last week, and we're 552,400km2 below the next lowest year on record, 2007.

The average daily increase has been about 40.4k/day over the last week, well ahead of the typical increase for the time of year of 24.8k/day.

The average daily increase for the next week is 51k/day, so something to watch.

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A quick review of September.

This year set new record lows for the:

1 day extent = 3,368,600km2 (previous low was 4,160,700km2)

5 day mean extent = 3,412,200km2 (previous low was 4,170,400km2)

Monthly mean extent = 3,578,900km2 (previous low was 4,280,500km2)

Every day in September was a new daily low record. This means that every day since July 27th has been a new record low for Arctic sea ice extent, which is 66 consecutive days and counting.

The daily minimum was 2,903,000km2 lower than the 79-11 average, while the monthly mean was 2,837,000km2 lower than the 79-11 average.

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As for the past week, the average daily extent increase has been 39.7K/day, compared to the 79-11 average of 51k/day. This means that as of the 30th of September, we are now 2,896,600km2, so further from average than we were at the minimum.

The average daily increase for the next week is 86.8k/day, so if the extent doesn't start increasing rapidly, we may pass the 3 million km2 anomaly for the first time.

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Edited by BornFromTheVoid
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The past week of NSIDC extent data.

The current 1 day extent is 4,439,950km2, while the 5 day mean is 4,256,000km2. We are now 481,200km2 off the next lowest year on record, 2007.

The average daily increase this past week has been 73k/day, so slightly lower than the long term average of 86.8k/day. This masks a strong growth increase during the week, with the last 2 days having averaged just over 100k.

This hasn't been enough to prevent the anomaly from climbing to over 3 million km2 though, with the highest anomaly being 3.06million on the 5th, and currently 3.02 million on the 7th.

The average growth rate over the next week is 96.5k/day

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October, week 2 update.

The current 1 day extent is 5,335,170, while the 5 day mean is on 5,033,500.

The daily anomaly (compared to 79-11) has reduced to 2,801,000km2, down from just over 3 million last week. We're currently just 72,500km2 off the next lowest year on record, 2007.

The average daily increase over the last 7 days has been about 128k/day, compared to the long term average of 96.5k/day.

The average daily increase for the next week is 89.3k/day, so a chance so really close in on the average.

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Update for week 3 of October

The current 1 day extent is 6,706,630km2, while the 5 day mean is on 6,329,300km2

.

The daily anomaly (compared to 79-11) has reduced to 2,055,000km2, down from just over 2.8 million last week. We're currently 257k ahead of 2007 and 98k ahead of 2011

The average daily increase over the last 7 days has been about 196k/day, compared to the long term average of 89.3k/day.

This week we've ended our run of consecutive record low daily extents, which spanned 81 days, from July 27th to October 15th

The average daily increase for the next week is 84.3k/day, so a chance to get within 1.5 million of average if we continue with strong gains.

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Week 4 of October.

The current 1 day extent is 7,438,870km2, while the 5 day mean is on 7,342,200km2

The daily anomaly (compared to 79-11) has reduced to 1,913,100km2, down from just over 2 million last week. We're currently lowest on record again though, 712k behind 2011 and 403k behind 2007.

The average daily increase over the last 7 days has been about 104.6k/day, compared to the long term average of 84.3k/day. But well below the 2007 and 2011 averages of 203k/day and 220k/day respectively.

The average increase over the next week is 84.6k/day, so we should at least continue to close in on the average mark.

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Latest weekly update, up to November 4th.

The current 1 day extent is 8,298,010km2 while the 5 day mean is on 8,144,100km2

The daily anomaly (compared to 79-11) has reduced to 1,646,200km2, down from just over 1.9 million last week. We're currently lowest on record still, 521,100km2 behind the next lowest on record, 2009.

The average daily increase over the last 7 days has been about 120.1k/day, compared to the long term average of 84.6k/day. But well below the 2007 and 2011 averages of 146k/day and 132k/day respectively.

The average increase over the next week is 60.3k/day, while the average of the last 5 years is 70.5k/day, so hopefully we'll be within 1.5 million of the average mark next week.

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Latest weekly update, up to November 11th.

The current 1 day extent is 8,936,820km2 while the 5 day mean is on 8,782,500km2

The daily anomaly (compared to 79-11) has reduced to 1,429,700km2, down from 1.65 million last week. We're currently lowest on record still, 389,400km2 behind the next lowest year, 2009. This extends the current streak of consecutive record low days to 17.

The average daily increase over the last 7 days has been about 91.3k/day, compared to the long term average of 60.3k/day, and the average of the last 5 years of 68.6k/day

The average increase over the next week is 67.7k/day.

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Data for the week up to October 18th

The current 1 day extent is 9,609,060km2, while the 5 day mean is on 9,367,800km2

The daily anomaly (compared to 79-11) has reduced to 1,231,300km2, down from 1.43 million last week. We're currently lowest on record still, 178,200km2 behind the next lowest year, 2006. This extends the current streak of consecutive record low days to 24.

The average daily increase over the last 7 days has been about 96k/day, compared to the long term average of 67.7k/day, and the average of the last 5 years of 71.1k/day

The average increase over the next week is 70.8k/day.

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Data for the week up to November 25th.

The current 1 day extent is 10,321,370km2 while the 5 day mean is on 10,133,600km2

The daily anomaly (compared to 79-11) has reduced to 1,014,400km2, down from 1.23 million last week. We're currently 3rd lowest on record, ahead of both 2006 and 2010, ending the streak of lowest on record days at 24.

The average daily increase over the last 7 days has been the highest on record for the period, at about 101k/day, compared to the long term average of 70.8k/day, and the average of the last 5 years of 71.1k/day.

The average long term increase over the next week is 80.9k/day.

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Latest weeks data and November overview.

Last week

The current 1 day extent is 11,017,820km2 while the 5 day mean is on 10,752,900km2

The daily anomaly (compared to 79-11) has reduced to 940,700km2, down from 1.01 million last week. We're currently 5th lowest on record, ahead of 2006, 2007, 2010 and 2011.

The average daily increase over the last 7 days was about 99.5k/day, compared to the long term average of 80.9k/day, and the average of the last 5 years of 79.7k/day.

The average long term increase over the next week is 74.5k/day.

November

The average daily extent gain during November was the highest on record at 94.9k/day (2,847,900km2 in total), with the 79-11 value being 70.5k/day.

We've gone from lowest on record to 5th lowest on record since the start of the month, the gap from the long term average has decreased from 1,664,900km2 to 992,000km2.

Annual SIE

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Average November Daily Gain

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Extent to December 2nd

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Update for the week to December 9th

The current 1 day extent is 11,757,150km2 while the 5 day mean is on 11,548,200km2

The daily anomaly (compared to 79-11) has reduced to 723,000km2, down from 940,700km2 last week. We're currently 5th lowest on record, ahead of 2006, 2007, 2010 and 2011.

The average daily increase over the last 7 days was about 105.6k/day, compared to the long term average of 74.5k/day, and the average of the last 5 years of 93.4k/day, giving 2012 the 3rd largest gain over this period on record, behind 2011 and 2006.

The average long term increase over the next week is 62.5k/day, with the average of the last 5 years being 67.6k/day.

If we maintain gains close to 100k/day over the next week, we may end up at the highest extent for the time of year since the early 2000s

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Update for the week to December 16th

The current 1 day extent is 11,869,880km2 while the 5 day mean is on 11,814,300km2

The daily anomaly (compared to 79-11) has increased to 1,048,000km2, down from 723,000km2 last week. We're currently lowest on record (down from 5th lowest last week), 61k behind 2006, the next lowest year.

The average daily increase over the last 7 days was about 16.1k/day, compared to the long term average of 62.5k/day, and the average of the last 5 years of 67.6k/day

The average long term increase over the next week is 53.6k/day, with the average of the last 5 years being 55.2k/day.

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Update to December 23rd

The current 1 day extent is 12,334,790km2 while the 5 day mean is on 12,285,800km2

The daily anomaly (compared to 79-11) has decreased to 958,500km2, down from just over 1 million km2 last week. We're currently 2nd lowest on record (up from lowest on record last week), 73.5k above 2010.

The average daily increase over the last 7 days was about 66.4k/day, compared to the long term average of 53.6k/day, and the average of the last 5 years of 55.2k/day

The average long term increase over the next week is 43.5k/day, with the average of the last 5 years being 50.8k/day.

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Update for the week to December 30th

The current 1 day extent is 12,974,430km2 while the 5 day mean is on 12,824,800km2

The daily anomaly (compared to 79-11) has decreased to 623,600km2, down from just under 1 million km2 last week. We're currently 3rd lowest on record (up from 2nd lowest on record last week).

The average daily increase over the last 7 days was about 91.3k/day (highest daily growth on record for the time period), compared to the long term average of 43.5k/day, and the average of the last 5 years of 50.8k/day

The average long term increase over the next week is 59.6k/day, with the average of the last 5 years being 55.3k/day.

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Update for the week to January 6th

The current 1 day extent is 13,044,910km2 while the 5 day mean is on 12,979,898km2

The daily anomaly (compared to 79-11) has increased to 970,600km2, up from just 624k last week. We're currently lowest on record (down from 3rd lowest on record last week), some 97k below 2011.

The average daily increase over the last 7 days was just 5.4k/day (lowest daily growth on record for the time period), compared to the long term average of 59.6k/day, and the average of the last 5 years of 55.3k/day

The average long term increase over the next week is 40.8k/day, with the average of the last 5 years being 51.7k/day.

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Update for the week to January 13th

The current 1 day extent is 13,548,370km2 while the 5 day mean is on 13,428,400km2

The daily anomaly (compared to 79-11) has dropped to 747,800km2, down from 971k last week. We're currently 4th lowest on record (up from lowest on record last week).

The average daily increase over the last 7 days was 72k/day (3rd highest daily growth on record for the time period), compared to the long term average of 40.8k/day, and the average of the last 5 years of 51.7k/day

The average long term increase over the next week is 41.8k/day, with the average of the last 5 years being 20.8k/day.

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BF, do you know of any sites that supply maps showing 'new' ice like the Met Office used to do by fax (years ago...)? I can find plenty of concentration maps but none that indicate when ice is being formed.

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BF, do you know of any sites that supply maps showing 'new' ice like the Met Office used to do by fax (years ago...)? I can find plenty of concentration maps but none that indicate when ice is being formed.

Not too sure. Do you mean maps showing ice age and type? http://www.aari.ru/o...1&mod=0&yy=2011

Posted Image

Thickness can give a rough indication of how old the ice is too.

Posted Image

Or something else? Have you any examples of the old Met Office maps?

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Not too sure. Do you mean maps showing ice age and type? http://www.aari.ru/o...1&mod=0&yy=2011

Posted Image

Thickness can give a rough indication of how old the ice is too.

Posted Image

Or something else? Have you any examples of the old Met Office maps?

They used to do a map where new ice was indicated by '*' dotted around. So, for example, when ice was forming in the 'Odden' it was easy to tell. And, when I was younger, it was a bit like looking for snow but you looked instead for the first report of new ice...

Bit like this Baltic map but for the Arctic.

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Greenland:

http://www.dmi.dk/dmi/en/index/gronland/iskort.htm#ugekort

http://en.vedur.is/media/hafis/iskort_dmi/dmi_weekly_icechart_bw.pdf

Eastern Canadian Arctic and Hudson Bay:

http://ice-glaces.ec.gc.ca/app/WsvPrdCanQry.cfm?CanID=11092&Lang=eng

Western Canadian Arctic:

http://ice-glaces.ec.gc.ca/app/WsvPrdCanQry.cfm?CanID=11081&Lang=eng

Alaska and Bering Sea:

http://pafc.arh.noaa.gov/ice.php

In general, Googling "ice chart" or "egg code" together with the name of the region of interest will find relevant websites.

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Greenland:

http://www.dmi.dk/dm...ort.htm#ugekort

http://en.vedur.is/m...icechart_bw.pdf

Eastern Canadian Arctic and Hudson Bay:

http://ice-glaces.ec...=11092&Lang=eng

Western Canadian Arctic:

http://ice-glaces.ec...=11081&Lang=eng

Alaska and Bering Sea:

http://pafc.arh.noaa.gov/ice.php

In general, Googling "ice chart" or "egg code" together with the name of the region of interest will find relevant websites.

Interesting, bookmarked and noted, but not quite what I was talking about. Those charts show where ice is, what it's concentration is but not (I think - I'm not sure of the Key to some of them) new ice - like the Baltic chart I linked to does.

I just used to find it interesting to see days when much new ice formed.

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