File:Plot arctic sea ice volume.svg
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Summary[edit]
| Description |
English: Plot of estimated development of arctic sea ice 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.Deutsch: Zeitverlauf der Schätzung des Volumens des arktischen Meereseises zwischen 1979 und 2010.
Die blaue Kurve wurde durch das numerische Modell PIOMAS berechnet. Als Fehler für Einzelwerte wird für Oktoberwerte (Minima) +- 1.35 10³ km³ als Orientierung angegeben. Die roten Punkte stammen aus der Analyse von CryoSat-2 - Radar-Freibordmessungen. Die Werte wurden aus einer Grafik durch Digitalisierung gewonnen (Quelle: Laxon et al., siehe unten). Ihre Einzelwert-Unsicherheit liegt im Bereich von +- 900 km³. Da das Bezugsgebiet der Plotdaten kleiner ist als das der PIOMAS-Rechnungen wurden erstere extrapoliert. Das PIOMAS-Volumen auf der CrySat-Referenzfläche wurde aus den veröffentlichten PIOMAS-Eisdickendaten gewonnen. Dort ist also das Volumenverhältnis zwischen dem CryoSat2- und PIOMAS-Modell bekannt. Unter der Annahme, dass es auf der gesamten PIOMAS-Referenzfläche gilt, wurden die CryoSat2-Daten aus den PIOMAS-Volumendaten durch Multiplikation mit diesem Verhältniswert extrapoliert. Durch diese Annahme ist eine gewisse zusätzliche Unsicherheit eingeführt worden. BEACHTE: Die CryoSat 2 - Werte laufen von Oktober bis April; deshalb stellt ihr niedrigster Wert nicht das Volumenminimum dar, welches im September liegt. |
| Date | |
| Source | Own work,
based on published data of Polar Science Center, University of Washington,http://psc.apl.washington.edu/wordpress/research/projects/arctic-sea-ice-volume-anomaly/ and Laxon et al, "CryoSat-2 estimates of Arctic sea ice thickness and volume", GRL 40, doi:10.1002/grl.50193. Digitization of data has been done by Wipneus on https://forum.arctic-sea-ice.net/index.php?topic=8.msg825#msg825. |
| Author | Dominiklenne |
Licensing[edit]
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I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
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File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:19, 6 August 2015 | | 688 × 516 (109 KB) | Dominiklenne | data update |
| 23:45, 30 January 2015 |  | 688 × 516 (109 KB) | Dominiklenne | Grid switched on again. | |
| 01:44, 25 January 2015 |  | 688 × 516 (107 KB) | Dominiklenne | Data update until december 2014. Switch from daily data to monthly data provided by the source to shrink file size. | |
| 15:20, 19 July 2014 |  | 688 × 517 (373 KB) | Dominiklenne | Update until day 181/2014. | |
| 22:17, 20 May 2013 |  | 688 × 517 (362 KB) | Dominiklenne | PIOMAS volume data added up until day 120 of 2013. | |
| 04:06, 3 March 2013 |  | 688 × 517 (357 KB) | Dominiklenne | Gemessene Sea Ice Volume Daten von Laxon et al 2013 eingearbeitet. | |
| 23:13, 3 October 2012 |  | 999 × 773 (331 KB) | Dominiklenne | data added until day 273/2012 | |
| 18:11, 24 May 2012 |  | 999 × 773 (327 KB) | Dominiklenne | Daten bis Tag 121/2012. Data until day 121/2012 included. | |
| 17:51, 24 October 2011 |  | 797 × 563 (324 KB) | Dominiklenne | Plot updated up to oct 24th 2011 | |
| 23:23, 5 July 2011 |  | 797 × 563 (318 KB) | Dominiklenne | same as last, but with other filename because plot was not properly displayed | |
| 19:01, 4 July 2011 |  | 797 × 563 (318 KB) | Dominiklenne | New data from last model run. Original data - not extracted from graph. | |
| 02:27, 12 June 2011 |  | 797 × 563 (71 KB) | Dominiklenne | Same plot with more data points to avoid additional errors. | |
| 22:30, 11 June 2011 |  | 797 × 563 (56 KB) | Dominiklenne | New version including data of may 2011. | |
| 19:27, 27 September 2010 |  | 878 × 588 (57 KB) | Dominiklenne | added data points for september 2010 | |
| 21:06, 6 September 2010 |  | 878 × 588 (58 KB) | Dominiklenne | Fehler in y-Achsenbeschriftung beseitigt Mistake corrected in y axis units. | |
| 22:58, 28 August 2010 |  | 649 × 466 (56 KB) | Dominiklenne | {{Information |Description={{en|1=Plot of (probably best estimate available of) development of arctic sea ice volume between 1979 and 2010}} {{de|1=Verlauf des Volumens des arktischen Meereseises zwischen 1979 und 2010.}} |Source={{own}} |Author=[[User:Do |
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