File:Plot arctic sea ice volume.svg
Summary
Plot of estimated development of arctic <a href="https://en.wikipedia.org/wiki/sea_ice" class="extiw" title="en:sea ice">sea ice</a> volume between 1979 and now.
Blue curve are data as determined by the numerical model PIOMAS. An error margin of +- 1.35 10³ km³ is given for october single values (minima) as orientation.
Red dots are data from an analysis of CryoSat 2 radar freeboard measurements. Their single point uncertainty is in the range of +- 900 km³. Data have been digitized from plot. Source: see below.
As the base region of Laxon et al's plot data is smaller than the base region of the PIOMAS simulation, the former have been extrapolated. The PIOMAS-volume data for the CryoSat reference area have been extracted from published thickness fields. So the volume ratio between the CryoSat2 and PIOMAS representations on this smaller domain is known. Assuming it beeing valid on the whole PIOMAS domain, CryoSat2 volume data for the larger domain have been calculated by multiplying whole domain PIOMAS volume values with said ratio. A certain additional uncertainty is introduced by this assumption.
NOTE: CryoSat 2 data points cover october to april, so their lowest point does not reflect the volume minimum, which happens in september.
Licensing
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 08:37, 7 January 2017 | | 688 × 516 (110 KB) | 127.0.0.1 (talk) | Plot of estimated development of arctic <a href="https://en.wikipedia.org/wiki/sea_ice" class="extiw" title="en:sea ice">sea ice</a> volume between 1979 and now. <p>Blue curve are data as determined by the numerical model PIOMAS. An error margin of +- 1.35 10³ km³ is given for october single values (minima) as orientation. </p> <p>Red dots are data from an analysis of CryoSat 2 radar freeboard measurements. Their single point uncertainty is in the range of +- 900 km³. Data have been digitized from plot. Source: see below. </p> <p>As the base region of Laxon et al's plot data is smaller than the base region of the PIOMAS simulation, the former have been extrapolated. The PIOMAS-volume data for the CryoSat reference area have been extracted from published thickness fields. So the volume ratio between the CryoSat2 and PIOMAS representations on this smaller domain is known. Assuming it beeing valid on the whole PIOMAS domain, CryoSat2 volume data for the larger domain have been calculated by multiplying whole domain PIOMAS volume values with said ratio. A certain additional uncertainty is introduced by this assumption. </p> NOTE: CryoSat 2 data points cover october to april, so their lowest point does not reflect the volume minimum, which happens in september. |
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