Temporal stability of long-term satellite and reanalysis products to monitor snow cover trends

Urraca, Ruben; Gobron, Nadine

doi:https://doi.org/10.5194/tc-17-1023-2023

Articles | Volume 17, issue 2

https://doi.org/10.5194/tc-17-1023-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/tc-17-1023-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 17, issue 2

Research article

|

02 Mar 2023

Research article |

| 02 Mar 2023

Temporal stability of long-term satellite and reanalysis products to monitor snow cover trends

Ruben Urraca and Nadine Gobron

Data sets

IMS Daily Northern Hemisphere Snow and Ice Analysis at 1 km, 4 km, and 24 km Resolutions U.S. National Ice Center https://doi.org/10.7265/N52R3PMC

ERA5 hourly data on single levels from 1959 to present H. Hersbach, B. Bell, P. Berrisford, G. Biavati, A. Horányi, J. Muñoz Sabater, J. Nicolas, C. Peubey, R. Radu, I. Rozum, D. Schepers, A. Simmons, C. Soci, D. Dee, and J.-N. Thépaut https://doi.org/10.24381/cds.adbb2d47

ERA5-Land hourly data from 1981 to present J. Munoz Sabater https://doi.org/10.24381/cds.e2161bac

Northern Hemisphere EASE-Grid 2.0 Weekly Snow Cover and Sea Ice Extent, Version 4 M. Brodzik and R. Armstrong https://doi.org/10.5067/P7O0HGJLYUQU

Short summary

We evaluate the fitness of some of the longest satellite (NOAA CDR, 1966–2020) and reanalysis (ERA5, 1950–2020; ERA5-Land, 1950–2020) products currently available to monitor the Northern Hemisphere snow cover trends using 527 stations as the reference. We found different artificial trends and stepwise discontinuities in all the products that hinder the accurate monitoring of snow trends, at least without bias correction. The study also provides updates on the snow cover trends during 1950–2020.