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04-11-2019, 09:48   #31
Kermit.de.frog
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Impressive ice formation in to the artic sea. This should continue for some weeks yet.
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04-11-2019, 09:58   #32
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Originally Posted by silverharp View Post
What is the significance of an average to 2010? Why not just have the average to last year?
I'd imagine it is because they started tracking it by Satellite in 1979 so the 1981-2010 is a climate period. This data can then be checked against land based observations that use the 1981-2010 climate period.
Every year "XXX1" plus 29 years makes for a climate period. From 1 January 2021 the climate data for 1991 to 2020 will be another period that comes out as a benchmark.
The 1961-1990 is a widely used benchmark to this day, even though we have 1971-2000 and 1981-2010.
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04-11-2019, 10:06   #33
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Originally Posted by Kermit.de.frog View Post
Impressive ice formation in to the arctic sea. This should continue for some weeks yet.
It is indeed, the rapid ice formation over the past two weeks or thereabouts has caught interest from many who are surprised by the rapid gains owing to the warmer than average air and sea surface temperatures there.

The levels are bouncing back towards the 2010s averages and within a couple of weeks could peek above that level if current refreeze trends continue.

Interestingly, the 80N temperatures show a persistent drop in temperatures, albeit slightly above the 1958-2002 norms, and a lack of mild air incursions which was the case in 2016 - see below:

2019:



2016:
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04-11-2019, 18:28   #34
Oneiric 3
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30 year climate period averages for Ireland:




Data from The University of East Anglia (UEA)
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04-11-2019, 18:55   #35
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interesting to see the 01-20 average i am guessing 9.8???? or so.
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04-11-2019, 20:28   #36
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Originally Posted by Oneiric 3 View Post
30 year climate period averages for Ireland:




Data from The University of East Anglia (UEA)
Interesting. What stations were used to collate this data?

Over the 100 year period our average temperature was 9.25c
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04-11-2019, 23:23   #37
Gaoth Laidir
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Originally Posted by Oneiric 3 View Post
30 year climate period averages for Ireland:



Data from The University of East Anglia (UEA)
I've overlaid your data on the Atlantic Multidecadal Oscillation data to highlight how much of a primary influence this natural mode is on European (and US) temperatures. I reckon if we had the precipitation data we'd see a similar pattern.

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05-11-2019, 17:26   #38
Oneiric 3
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Climate period averages for Northern Ireland from the UK Met. Data only from 1910 available. Similar trends, though more variance between each period




Source: https://www.metoffice.gov.uk/pub/dat...rn_Ireland.txt


Danno & Gaoth. Info about that data from link below. Not sure what, if any, Irish stations are used to help calculate this data, but would imagine that long-term datasets from the likes of Armagh, Phoenix Pk and Valentia played a big role.

http://www.cru.uea.ac.uk/data

In which you can download both temperature and rainfall data for a specific region from this portal:

https://climateknowledgeportal.world.../download-data.

Useful data resource, but I think they underplay both warm and cold monthly extremes, which has always been the nature of data based primarily on model reanalysis.

.
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05-11-2019, 22:36   #39
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Here are the Ireland figures from that link, Oneiric.

Attached Images
File Type: png Ireland average precip.png (9.1 KB, 1727 views)
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08-11-2019, 00:20   #40
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Ice formation has begun in Hudson Bay.



Easy to see why. Sea Ice will advance rapidly here in the coming days with very cold incursions in to North America...




Last edited by Kermit.de.frog; 08-11-2019 at 00:28.
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08-11-2019, 06:47   #41
Gaoth Laidir
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https://twitter.com/thisisFINLAND/st...887415296?s=19
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08-11-2019, 09:01   #42
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Heaven.
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16-11-2019, 21:21   #43
Gaoth Laidir
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Originally Posted by Oneiric 3 View Post
Daily sea ice concentration for October 2019 from NISDC/NASS. Orange line represents the 1981-2010 median extent.
(Large gif file so may take a short while to load)
Overall, the month of October saw Arctic ice gain close to average. More here.

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30-11-2019, 08:41   #44
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This November's Arctic ice extent up to yesterday (circled in blue). Looks like it will finish in and around the longer term trend.



(DMI)
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02-12-2019, 09:24   #45
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November's daily sea ice extent and thickness animation from the Danish Met Office: (large file; may take many minutes to load)



Doing OK on the Atlantic side, but struggling on the Pacific edge.
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