File:NSIDC arctic sea ice extent since 1979.svg

From Wikimedia Commons, the free media repository
Jump to navigation Jump to search

Original file ‎(SVG file, nominally 810 × 540 pixels, file size: 37 KB)

Captions

Captions

The extent of the floating arctic sea ice as it develops through seasons and years.

Summary[edit]

Description
English: Plot of arctic sea ice extent development between 1979 and 2023 in monthly mean values. For the determination of the "area" value, every pixel with a sea ice concentration > .15 is taken. The pixel area is multiplied with the concentration value derived from the passive infrared signal. For the "extent" value, the concentration value is taken as 1, so we basically get full area with >.15 concentration.
Deutsch: Verlauf der Umrissfläche des arktischen Meereises in Monatsmittelwerten von 1979 bis 2023. Für die "area"-Daten werden alle Pixel mit einer Eiskonzentration > 0.15 genommen und deren Fläche mit der Eiskonzentration multipliziert. Für die "extent"-Daten wird diese Eiskonzentration =1 gesetzt - so erhält man die Gesamtfläche mit überhaupt irgendwelchem Eis.
Date
Source Own work
Author Dominiklenne

Data source: Fetterer, F., K. Knowles, W. Meier, and M. Savoie. 2002, updated until 2010. Sea Ice Index. Boulder, Colorado USA: National Snow and Ice Data Center. Digital media. ftp://sidads.colorado.edu/DATASETS/NOAA/G02135/. Corresponding website: http://nsidc.org/data/seaice_index/archives/index.html

For the area definition see: https://nsidc.org/learn/ask-scientist/what-difference-between-sea-ice-area-and-extent

Licensing[edit]

Public domain 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.

File history

Click on a date/time to view the file as it appeared at that time.

(newest | oldest) View (newer 10 | ) (10 | 20 | 50 | 100 | 250 | 500)
Date/TimeThumbnailDimensionsUserComment
current17:48, 23 October 2023Thumbnail for version as of 17:48, 23 October 2023810 × 540 (37 KB)Dominiklenne (talk | contribs)update to october 2023
21:07, 9 May 2023Thumbnail for version as of 21:07, 9 May 2023810 × 540 (37 KB)Dominiklenne (talk | contribs)update to april 2023
19:12, 4 March 2022Thumbnail for version as of 19:12, 4 March 2022810 × 540 (36 KB)Dominiklenne (talk | contribs)update until february 2022
00:39, 7 November 2020Thumbnail for version as of 00:39, 7 November 2020810 × 540 (42 KB)Dominiklenne (talk | contribs)update until october 2020
17:16, 27 October 2019Thumbnail for version as of 17:16, 27 October 2019810 × 540 (45 KB)Dominiklenne (talk | contribs)data added until september 2019, year scale extended to 2030
22:35, 30 October 2018Thumbnail for version as of 22:35, 30 October 2018810 × 540 (47 KB)Dominiklenne (talk | contribs)data updated until september 2018
22:44, 8 July 2017Thumbnail for version as of 22:44, 8 July 2017810 × 540 (47 KB)Dominiklenne (talk | contribs)data updated until june 2017
21:43, 22 July 2016Thumbnail for version as of 21:43, 22 July 2016810 × 540 (47 KB)Dominiklenne (talk | contribs)data updated until june 2016
21:43, 27 August 2015Thumbnail for version as of 21:43, 27 August 2015810 × 540 (40 KB)Dominiklenne (talk | contribs)minor y scale change to the same as in https://commons.wikimedia.org/wiki/File:Plot_arctic_sea_ice_area.svg
17:03, 27 August 2015Thumbnail for version as of 17:03, 27 August 2015810 × 540 (40 KB)Dominiklenne (talk | contribs)update until 2015 / 07. Use of python matplotlip pyplot instead of Gnumeric. Slightly different y-scale for better exhaustion of plot area.
(newest | oldest) View (newer 10 | ) (10 | 20 | 50 | 100 | 250 | 500)

You cannot overwrite this file.

The following 3 pages use this file:

File usage on other wikis

The following other wikis use this file:

Metadata

This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Retrieved from "https://commons.wikimedia.org/w/index.php?title=File:NSIDC_arctic_sea_ice_extent_since_1979.svg&oldid=867298544"