Determining the cause of inconsistent onset-season trends in the Northern Hemisphere snow cover extent record.

ABSTRACT: While seasonal snow cover extent (SCE), an essential climate variable, has broadly declined as a response to global warming, notable inconsistencies remain among long-term satellite-based estimates of SCE change during the Northern Hemisphere snow onset season. SCE datasets from a reanalysis-driven simple snow model serve as benchmarks and allow us to reconcile the trends from one prominent snow cover record with other recent studies. In particular, artificial increasing snow cover trends in the National Oceanic and Atmospheric Administration's Snow Cover Extent Climate Data Record (CDR) during the onset season are related to changes in snow detection sensitivity. This artificial drift primarily affects September, October, and November snow cover but is detectible through February. Revised

SUBMITTER: Elias Chereque A 

PROVIDER: S-EPMC12577703 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature