Arctic Sea Ice – Page 145

Sea Ice Extent (Global Antarctic and Arctic) – Day 27 – 2016

Published on January 28, 2016January 28, 2016 by sunshinehours1Leave a comment

South / North

Sea Ice Extent (Global Antarctic and Arctic) – Day 25 – 2016

Published on January 26, 2016January 26, 2016 by sunshinehours1Leave a comment

South / North

Sea Ice Extent (Global Antarctic and Arctic) – Day 24 – 2016

Published on January 25, 2016January 25, 2016 by sunshinehours1Leave a comment

South / North

Sea Ice Extent (Global Antarctic and Arctic) – Day 22 – 2016

Published on January 23, 2016January 23, 2016 by sunshinehours1Leave a comment

South / North

Sea Ice Extent (Global Antarctic and Arctic) – Day 21 – 2016

Published on January 22, 2016January 22, 2016 by sunshinehours1Leave a comment

South / North

Sea Ice Extent (Global Antarctic and Arctic) – Day 20 – 2016

Published on January 21, 2016January 21, 2016 by sunshinehours1Leave a comment

South / North

Sea Ice Extent (Global Antarctic and Arctic) – Day 19 – 2016

Published on January 20, 2016January 20, 2016 by sunshinehours1Leave a comment

South / North

Sea Ice Extent – Day 18 2016 – Sawtooth Pattern

Published on January 19, 2016January 19, 2016 by sunshinehours1Leave a comment

The sawtooth pattern for day 18.

Data: South / North

MASIE versus NSIDC – Day 17 – 2016

Published on January 18, 2016January 18, 2016 by sunshinehours11 Comment

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.