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What will the NSIDC 2017 Arctic SIE September average be?

Between 5.0 and 5.5 million km2
0 (0%)
Between 4.75 and 5.25 million km2
3 (2.8%)
Between 4.5 and 5.0 million km2
10 (9.3%)
Between 4.25 and 4.75 million km2
26 (24.3%)
Between 4.0 and 4.5 million km2
16 (15%)
Between 3.75 and 4.25 million km2
16 (15%)
Between 3.5 and 4.0 million km2
12 (11.2%)
Between 3.25 and 3.75 million km2
9 (8.4%)
Between 3.0 and 3.5 million km2
5 (4.7%)
Between 2.75 and 3.25 million km2
3 (2.8%)
Between 2.5 and 3.0 million km2
3 (2.8%)
Between 2.25 and 2.75 million km2
0 (0%)
Between 2.0 and 2.5 million km2
0 (0%)
Between 1.75 and 2.25 million km2
0 (0%)
Between 1.5 and 2.0 million km2
1 (0.9%)
Between 1.25 and 1.75 million km2
0 (0%)
Between 1.0 and 1.5 million km2
1 (0.9%)
Between 0.75 and 1.25 million km2
0 (0%)
Between 0.5 and 1.0 million km2
2 (1.9%)
Between 0.25 and 0.75 million km2
0 (0%)
Between 0 and 0.5 million km2
0 (0%)

Total Members Voted: 102

Voting closed: August 12, 2017, 07:53:08 AM

Author Topic: NSIDC 2017 Arctic SIE September average: August poll  (Read 12241 times)

Tealight

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Re: NSIDC 2017 Arctic SIE September average: August poll
« Reply #50 on: October 02, 2017, 01:43:00 AM »
September is over and I calculated 4.871 million km2 as the monthly September extent. Just a small increase of 150k since the 23rd September.

Niall Dollard

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Re: NSIDC 2017 Arctic SIE September average: August poll
« Reply #51 on: November 05, 2017, 06:43:50 PM »
For the monthly extent the NSIDC calculates the average sea ice concentration for every pixel and if the concentration is over 15% for the entire month the pixel is counted as ice covered. This is completely independent from daily values.


So for anyone who may not have seen this yet, the NSIDC have announced in their early Nov bulletin that they have changed the way the monthly average sea ice extent is calculated.

The monthly average total extent (and area) are now computed as an average of the daily values over the month.

http://nsidc.org/arcticseaicenews/
« Last Edit: November 05, 2017, 07:28:07 PM by Niall Dollard »

Dharma Rupa

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Re: NSIDC 2017 Arctic SIE September average: August poll
« Reply #52 on: November 05, 2017, 08:29:53 PM »
For the monthly extent the NSIDC calculates the average sea ice concentration for every pixel and if the concentration is over 15% for the entire month the pixel is counted as ice covered. This is completely independent from daily values.


So for anyone who may not have seen this yet, the NSIDC have announced in their early Nov bulletin that they have changed the way the monthly average sea ice extent is calculated.

The monthly average total extent (and area) are now computed as an average of the daily values over the month.

http://nsidc.org/arcticseaicenews/

Yes, and my rough translation of that is "the people over at ASIG complained."