edu.ucar.opensky::articles:26975 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:01:16.479189 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7kk9gz1 https://doi.org/10.5281/zenodo.8342373 https Related JournalArticle #1 North Atlantic meltwater during Heinrich Stadial 1 drives wetter climate with more atmospheric rivers in western North America North Atlantic meltwater during Heinrich Stadial 1 drives wetter climate with more atmospheric rivers in western North America 2023-11-17T00:00:00Z publication https://n2t.org/ark:/85065/d7kk9gz1 https://doi.org/10.1126/sciadv.adj2225 Oster, J. L. author Macarewich, Sophia author Lofverstrom, M. author de Wet, C. author Montañez, I. author Lora, J. M. author Skinner, C. author Tabor, C. author UCAR/NCAR - Library publisher Atmospheric rivers (ARs) bring concentrated rainfall and flooding to the western United States (US) and are hypothesized to have supported sustained hydroclimatic changes in the past. However, their ephemeral nature makes it challenging to document ARs in climate models and estimate their contribution to hydroclimate changes recorded by time-averaged paleoclimate archives. We present new climate model simulations of Heinrich Stadial 1 (HS1; 16,000 years before the present), an interval characterized by widespread wetness in the western US, that demonstrate increased AR frequency and winter precipitation sourced from the southeastern North Pacific. These changes are amplified with freshwater fluxes into the North Atlantic, indicating that North Atlantic cooling associated with weakened Atlantic Meridional Overturning Circulation (AMOC) is a key driver of HS1 climate in this region. As recent observations suggest potential weakening of AMOC, our identified connection between North Atlantic climate and northeast Pacific AR activity has implications for future western US hydroclimate. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation