glacier

Iceberg B-22A on the go

B-22A is the largest iceberg in the Amundsen Sea, Antarctica (50 times Manhattan land area). It broke off from Thwaites Glacier’s tongue and remained grounded for 20 years.. But now it’s on the go, as shown by this animation I made from Sentinel-1 SAR images (about 1 per month since June 2015, total 75 frames): […]

Kyrgyzstan glacier collapse. New Pléiades and SPOT7 images tell us more…

Because the first images were partly cloudy, the Pléiades 1A and 1B satellites (CNES/Airbus) continued to acquire images over Kyrgyzstan and a cloud-free 0.7-m stereoscopic pair was acquired 16 July 2022. We could also obtain a 1.5 m SPOT7 stereoscopic pair from the Airbus DS archive thanks to the Dinamis initiative. The latter was taken […]

Estimation of Marmolada glacier collapse volume using Pléiades imagery

The deadly Marmolada glacier collapse happened on 3 July 2022. On 6 July 2022, Pléiades 1B (CNES, Airbus DS)  acquired a clear-sky stereo pair of the area. From these images we could estimate a detached volume of ice of 65’000 ± 10’000 cubic meters. First, we generated a digital elevation model (DEM) from Pléiades stereo […]

La barrière de glace orientale du glacier Thwaites est en train de craquer

Thwaites est un immense glacier en Antarctique qui contribue déjà à 4% de la hausse du niveau des océans à lui tout seul. La barrière de glace flottante devant le front oriental du glacier agit comme un barrage qui ralentit le flux de glace du continent vers l’océan. Si cette plateforme de glace se brise, […]

Viedma glacier terminus since 1985

Viedma Glacier is an iconic glacier of the Southern Patagonia icefield. Landsat 5, Landsat 8 and Sentinel-2 images series show that its terminus has retreated by 3 km since 1985. Looking closer one can notice a new proglacial lake forming in a recently deglaciated area. Since I won 80 sq km of Airbus Pléiades data, […]

Amincissement du glacier d’Ossoue entre 2017 et 2021

Au cours des quatre dernières années le glacier d’Ossoue a perdu en moyenne 6 mètres d’épaisseur. Par endroit, son amincissement dépasse 8 mètres, soit 2 mètres par an. Cette carte a été obtenue par le traitement de couples d’images stéréoscopiques Pléiades (CNES/Airbus DS) acquises le 8 octobre 2017 et le 9 octobre 2021. En octobre […]

Debris flow in the Ishkoman Valley

In July 2018, the Pamir Times has reported that a lake formed due to a debris flow in the Ishkoman Valley, Pakistan. This event caused the destruction of dozens of housed in Badswat and Bilhanz villages. The flood debris running down the slope hit the mountain on the opposite side, and formed a barrier, blocking […]

Rechercher