Snow melt out day in the French Alps and Pyrenees from SPOT, Landsat and Sentinel-2 data

This is the accompagnying dataset of the manuscript "Trends in the annual snow melt-out day over the French Alps and the Pyrenees from 38 years of high resolution satellite data (1986-2023)" submitted to The Cryosphere by Zacharie Barrou Dumont, Simon Gascoin, Jordi Inglada, Andreas Dietz, Jonas Köhler, Matthieu Lafaysse, Diego Monteiro, Carlo Carmagnola, Arthur Bayle, Jean-Pierre Dedieu, Olivier Hagolle, and Philippe Choler [1].

The dataset contains the annual snow melt out day (SMOD) in the French Alps and Pyrenees at 20 m resolution. The SMOD were computed with the let-it-snow software v1.10 from a collection of snow cover products (SPOT 1, SPOT 2, SPOT 3, SPOT 4, SPOT 5, Landsat 5, Landsat 7, Landsat 8, Sentinel-2A and Sentinel-2B). The snow cover products were computed following references [2] (SPOT), [3] (Sentinel-2) and [4] (Landsat).

Each file is named according to the following convention:

SMOD_${TILE}_{START_DATE}_{END_DATE}.tif

where TILE is the Sentinel-2 tile and START_DATE and END_DATE define the period of calculation.

For example :

SMOD_31TGM_19930901_19940831.tif

References

[1] Barrou Dumont, Z., Gascoin, S., Inglada, J., Dietz, A., Köhler, J., Lafaysse, M., Monteiro, D., Carmagnola, C., Bayle, A., Dedieu, J.-P., Hagolle, O., and Choler, P.: Trends in the annual snow melt-out day over the French Alps and the Pyrenees from 38 years of high resolution satellite data (1986–2023), EGUsphere [preprint], https://doi.org/10.5194/egusphere-2024-3505, 2024.

[2] Barrou Dumont, Z., Gascoin, S., and Inglada, J. (2024) Snow and Cloud Classification in Historical SPOT Images: An Image Emulation Approach for Training a Deep Learning Model Without Reference Data, IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 1–13, https://doi.org/10.1109/JSTARS.2024.3361838.

[3] Gascoin, S., Grizonnet, M., Bouchet, M., Salgues, G., and Hagolle, O. (2019) Theia Snow collection: high-resolution operational snow cover maps from Sentinel-2 and Landsat-8 data, Earth Syst. Sci. Data, 11, 493-514, https://doi:10.5194/essd-11-493-2019. 

[4] Koehler J, Dietz AJ, Zellner P, Baumhoer CA, Dirscherl M, Cattani L, Vlahović Ž, Alasawedah MH, Mayer K, Haslinger K, et al. Drought in Northern Italy: Long Earth Observation Time Series Reveal Snow Line Elevation to Be Several Hundred Meters Above Long-Term Average in 2022. Remote Sensing. 2022; 14(23):6091. https://doi.org/10.3390/rs14236091