snow-ice
« We are currently experiencing the driest autumn the country has experienced in 50 years » said Iran’s meteorological organisation. Near Tehran, Mount Damavand, the highest peak in Iran (5609 m) was reported to be « unusually bare of snow ». I checked this statement using my MODIS snow cover data processing algorithm implemented in Google Earth Engine (Gascoin […]
In English
Hello everyone, We have just created a mailing list for users of the IOTA2 software (iota2 — iota2 documentation). The tool will undergo significant developments in the coming months, and the purpose of this list is to communicate with the community to support these changes and to maintain the processing workflows needed by the users. […]
3D
Grâce à DINAMIS, un couple d’images stéréoscopiques a été acquis par Pléiades 1B le 14 septembre 2025. Le modèle numérique de surface (MNS) produit à partir de ces images peut être comparé à un autre MNS de septembre 2013 produit à partir des images Pléiades 1A commandées par Marti et al. (2014). Le glacier d’Ossoue […]
In English
Pakistan news media reported that a glacier lake outburst flood (the failure of a dam containing a glacial lake) occurred near Gupis, Gilgit-Baltistan, a highly mountainous region administered by Pakistan. Satellite images show that the flood triggered a debris flow, which reached the Gupis valley where it hit the Roshan (Rashon) village and blocked the […]
Agriculture
En 2024, des collègues du Cesbio ont publié un article* sur la cartographie de la date de fauche en France en 2022 à partir des données satellitaires Sentinel-2. Leur magnifique figure 10 a attiré mon attention. La version à haute résolution fournie avec l’article (2861 × 2911 pixels) correspond à une image dont les pixels font […]
Composite (3A)
Les socio-écosystèmes des Alpes et des Pyrénées dépendent étroitement des fluctuations annuelles du manteau neigeux. En particulier, le moment de l’année où la neige disparait détermine le début de la saison de croissance de la végétation de montagne et donc la période des estives. Le changement climatique est en train de bouleverser ce rythme saisonnier. […]
Biomass
After SMOS in 2009, and VENµS in 2017, the CESBIO laboratory is very proud to see its third proposed mission, Biomass, reach orbit. As always, it has been a long journey from the idea, at the beginning of the century, to the selection in 2013 as the seventh Earth Explorer Mission by ESA, to the […]
Sentinel-2
Sentinel-2 captured several clear-sky images of Myanmar before and after the 28 March 2025 earthquake. The animation below shows a 5-day apart sequence of images captured by Sentinel-2B and Sentinel-2C (10 m resolution) near the epicenter located close to Mandalay. The surface slip due to the earthquake follows the Sagaing Fault, a major fault in […]
CESBIO
=> In arid or semi-arid regions, where irrigation is widespread, monitoring agricultural water resources is essential to anticipate shortages. These resources may come from large dams, small reservoirs, or groundwater aquifers. This is the case in the state of Telangana, in South India, where numerous large dams (shown in cyan blue in the figure below) […]