MASIE versus NSIDC – Day 17 – 2016

MASIE and NSIDC are two different sea ice indexes. The difference between the two methodologies is here.

“MASIE relies on data from the Interactive Multisensor Snow and Ice Mapping System (IMS) that runs at the National Ice Center (NIC). The IMS product uses several satellite data sources including passive microwave, but it is also based on visual analysis and other data sources and undergoes a form of manual data fusion.”

“The Sea Ice Index (SII) relies on satellite passive microwave data as its only data source. These data are automatically processed using an algorithm and have known biases and limitations;”

Ron Clutz made a comment here that had me thinking what was the difference between the two methodologies over time? The comparison starts in 2006 because that is the oldest MASIE data available.The value being graphed is the NSIDC SII value minus the MASIE value.

As you can see … once upon a time the NSIDC SII was generally higher than MASIE. Now MASIE is generally higher.

What does it mean? I don’t know.

 

 

NOAA Arctic minus MASIE - 2016017

MASIE Arctic Day 7

Thanks to Ron Clutz for pointing out the MASIE data goes back to 2006 now.

And for pointing out that MASIE for 2016 is running pretty high compared to NSIDC.

This is MASIE from 2006 to 2016. Strange that MASIE has fallen in last 2 days and NSIDC has jumped.

MASIE Arctic Ice Extent - Northern_Hemisphere - as of 2016-007 Zoomed

 

 

 

MASIE Arctic Day 343- Difference From 2012

MASIE for day 343. The list of regions and difference from 2012.   8 regions   have less ice in 2015 than 2012. (3 of those are tiny)

Northern Hemisphere (Total) 153742
Beaufort Sea 0
Chukchi Sea -21590
East Siberian Sea -17
Laptev Sea -36
Kara Sea 155836
Barents Sea -119714
Greenland Sea 72707
Baffin Bay Gulf of St. Lawrence 217841
Canadian Archipelago -36
Hudson Bay 14328
Central Arctic -26879
Bering Sea -152832
Baltic Sea -9668
Sea of Okhotsk 31320
Yellow Sea 151

MASIE Arctic Ice Extent - Baffin_Bay_Gulf_of_St._Lawrence - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Baltic_Sea - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Bering_Sea - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Canadian_Archipelago - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Central_Arctic - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Hudson_Bay - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Sea_of_Okhotsk - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Yellow_Sea - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Baltic_Sea - as of 2015-343 MASIE Arctic Ice Extent - Barents_Sea - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Beaufort_Sea - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Chukchi_Sea - as of 2015-343 Zoomed MASIE Arctic Ice Extent - East_Siberian_Sea - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Greenland_Sea - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Kara_Sea - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Laptev_Sea - as of 2015-343 Zoomed MASIE Arctic Ice Extent - Northern_Hemisphere - as of 2015-343 Zoomed

MASIE Arctic Day 328 – Difference From 2012

MASIE for day 328.  The two regions with significantly less ice in 2015 compared to 2012.

The numbers are 2015 Ice Extent minus 2012 Ice Extent.

Northern Hemisphere (Total) 443,561
Beaufort Sea 0
Chukchi Sea -197,674
East Siberian Sea -17
Laptev Sea -36
Kara Sea 298,415
Barents Sea 19,452
Greenland Sea 67,341
Baffin Bay Gulf of St. Lawrence 176,329
Canadian Archipelago -107
Hudson Bay 212,481
Central Arctic -14,691
Bering Sea -141,754
Baltic Sea 0
Sea of Okhotsk 28,944
Yellow Sea 151

MASIE Arctic Ice Extent - Bering_Sea - as of 2015-328 Zoomed MASIE Arctic Ice Extent - Chukchi_Sea - as of 2015-328 Zoomed

 

MASIE Arctic Day 319 – Difference From 2012

MASIE for day 319. The list of regions and difference from 2012. 5 have less ice in 2015 than 2012. (But 3 of those are tiny)

Northern Hemisphere (Total) 1049407
Beaufort Sea 0
Chukchi Sea -135184
East Siberian Sea -17
Laptev Sea -36
Kara Sea 431718
Barents Sea 83191
Greenland Sea 8218
Baffin Bay Gulf of St. Lawrence 427706
Canadian Archipelago -107
Hudson Bay 232193
Central Arctic 82984
Bering Sea -95687
Baltic Sea 0
Sea of Okhotsk 15041
Yellow Sea 0

MASIE Arctic Ice Extent - Baffin_Bay_Gulf_of_St._Lawrence - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Baltic_Sea - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Bering_Sea - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Canadian_Archipelago - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Central_Arctic - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Hudson_Bay - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Sea_of_Okhotsk - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Yellow_Sea - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Barents_Sea - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Beaufort_Sea - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Chukchi_Sea - as of 2015-319 Zoomed MASIE Arctic Ice Extent - East_Siberian_Sea - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Greenland_Sea - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Kara_Sea - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Laptev_Sea - as of 2015-319 Zoomed MASIE Arctic Ice Extent - Northern_Hemisphere - as of 2015-319 Zoomed

MASIE Arctic Day 299 – Difference From 2012

MASIE for day 299. The list of regions and difference from 2012. 3 have less ice in 2015 than 2012.

Northern_Hemisphere 1374906.13
Beaufort_Sea 484484.07
Chukchi_Sea -60051.49
East_Siberian_Sea -127044.94
Laptev_Sea 100968.11
Kara_Sea 435526.81
Barents_Sea 9450.17
Greenland_Sea -18418.87
Baffin_Bay_Gulf_of_St._Lawrence 202557.95
Canadian_Archipelago 174734.34
Hudson_Bay 79467.49
Central_Arctic 93232.5
Bering_Sea 0
Baltic_Sea 0
Sea_of_Okhotsk 0
Yellow_Sea 0

MASIE Arctic Ice Extent - Baffin_Bay_Gulf_of_St._Lawrence - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Baltic_Sea - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Bering_Sea - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Canadian_Archipelago - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Central_Arctic - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Hudson_Bay - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Sea_of_Okhotsk - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Yellow_Sea - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Barents_Sea - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Beaufort_Sea - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Chukchi_Sea - as of 2015-299 Zoomed MASIE Arctic Ice Extent - East_Siberian_Sea - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Greenland_Sea - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Kara_Sea - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Laptev_Sea - as of 2015-299 Zoomed MASIE Arctic Ice Extent - Northern_Hemisphere - as of 2015-299 Zoomed