Post by Frivolousz21 on Mar 29, 2014 5:50:29 GMT -6
Let's get this party started.
Here is the master site for nearly all of the analysis, observational, and predictional tools you will ever need pertaining to Arctic Sea Ice.
sites.google.com/site/arcticseaicegraphs/
There are four reliable arctic sea ice data sets available. Two of them track Sea ice extent mostly the other tracks Sea ice area. The other from the University of Bremen as well as the university of hamburg track extent and area. However this one is mostly used for the precision high resolution concentration charts they produce.
Definition of sea-ice cover (extent and area)
1. Jaxa-iarc sea ice extent and ice concentration.
2. The cryosphere today
3. nsidc.org/arcticseaicenews/
4. Bremen-AMSR2
5. Daily visible satellite images of the cryosphere(arctic)
This is the Jaxa sea ice extent time series. It updates everyday around 10 pm central. This data set is by far the most reliable. It uses daily and day before data(to fill in gaps where needed) only.
This is The Cryosphere today Sea ice area time series. This graphic updates daily.
This is the daily University of Hamburg 3.125km high resolution sea ice concentration image. It uses the same algorithm the ASIv6 that the folks at the University of Bremen created. It is a very large file. I apologize. If it needs to be taken down please let me know. This is best most detailed daily graphic ever created up to this point.
The data comes from the AMSR2 satellite sensor. Using the channel 89ghz frequency for the base temperature brightness for most of the data in the composite. It also uses channels 36 and 18 which are lower resolutions but help clear up clouds, water vapor, and ice crystals and snow to increase the reliability of the ice concentration. Channel 89 is very high res and precise but is also tainted by ice crystals in higher clouds very easily which can make ice concentration appear to be higher.
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Here is the master site for nearly all of the analysis, observational, and predictional tools you will ever need pertaining to Arctic Sea Ice.
sites.google.com/site/arcticseaicegraphs/
There are four reliable arctic sea ice data sets available. Two of them track Sea ice extent mostly the other tracks Sea ice area. The other from the University of Bremen as well as the university of hamburg track extent and area. However this one is mostly used for the precision high resolution concentration charts they produce.
Definition of sea-ice cover (extent and area)
The area of sea-ice cover is often defined in two ways, i.e., sea-ice "extent" and sea-ice "area." These multiple definitions of sea-ice cover may sometimes confuse data users. The former is defined as the areal sum of sea ice covering the ocean (sea ice + open ocean), whereas the latter "area" definition counts only sea ice covering a fraction of the ocean (sea ice only). Thus, the sea-ice extent is always larger than the sea-ice area. Because of the possible errors in SIC mentioned above, satellite-derived sea-ice concentration can be underestimated, particularly in summer. In such a case, the sea-ice area is more susceptible to errors than the sea-ice extent. Thus, we adopt the definition of sea-ice extent to monitor the variation of the Arctic sea ice on this site.
1. Jaxa-iarc sea ice extent and ice concentration.
2. The cryosphere today
3. nsidc.org/arcticseaicenews/
4. Bremen-AMSR2
5. Daily visible satellite images of the cryosphere(arctic)
This is the Jaxa sea ice extent time series. It updates everyday around 10 pm central. This data set is by far the most reliable. It uses daily and day before data(to fill in gaps where needed) only.
This is The Cryosphere today Sea ice area time series. This graphic updates daily.
This is the daily University of Hamburg 3.125km high resolution sea ice concentration image. It uses the same algorithm the ASIv6 that the folks at the University of Bremen created. It is a very large file. I apologize. If it needs to be taken down please let me know. This is best most detailed daily graphic ever created up to this point.
The data comes from the AMSR2 satellite sensor. Using the channel 89ghz frequency for the base temperature brightness for most of the data in the composite. It also uses channels 36 and 18 which are lower resolutions but help clear up clouds, water vapor, and ice crystals and snow to increase the reliability of the ice concentration. Channel 89 is very high res and precise but is also tainted by ice crystals in higher clouds very easily which can make ice concentration appear to be higher.