I would like to put the recent calving into historical context
Information on previous calvings:
> October 1998: east side calving, producing iceberg A-38 with an area of about 5600 km².
> February 2000: calving on the west side, producing iceberg A-43 of a similar size (167x32 km)
To visualise the changes in time of the front I provide three animations using the AVHRR/Modis archives. They show that this calving is part of a normal activity of the Ronne ice shelf, but this does not mean that the next ones will always be in the normal range!
First animation: it contains AVHRR/Modis images from 1993 to 2019, with an average interval of one year between images.
The images contain the surroundings of the front and are preceded by a map of the Ronne ice shelf
The animation slows down during two calvings in 1998 and 2000
1px=1km
Second animation: it contains two cycles:
> first: the images of 22/05/1995, 02/01/2001, 18/12/2007, 30/12/2014 and 13/05/2021 (Sentinel1 image)
> second: only the images of 02/01/2001 and 13/05/2021 to compare the fronts relative to the two calvings of 2000 and 2021.
By reducing the number of images we zoom in a little : 1px=500m
Third animation : I took all the images of the first one (excluding the map) to which I added the image of 13/05/2021, but I reduced the displayed area by limiting myself to the front, which allowed to zoom in : 1px =312,5m
As for the second animation, there are two cycles: the first with all the images and the second with only the two images of 02/01/2001 and 13/05/2021.
As a precaution, given the volumes of the animations I will post them in three posts.
Click to animate