edu.ucar.opensky::articles:26858 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T19:00:28.453143 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d76977pm https://doi.org/10.5065/JZ08-3W17 https Related Dataset #1 NOAA NCEI Extended Reconstructed Sea Surface Temperature https://doi.org/10.5065/P8GT-0R61 https Related Dataset #2 ERA5 Reanalysis (Monthly Mean 0.25 Degree Latitude-Longitude Grid) https://doi.org/10.5676/DWD_GPCC/FD_M_V2022_100 https Related Dataset #3 GPCC Full Data Monthly Version 2022 at 1.0°: Monthly Land-Surface Precipitation from Rain-Gauges built on GTS-based and Historic Data Anthropogenic aerosols contribute to the recent decline in precipitation over the U.S. Southwest 2023-12-01T00:00:00Z publication https://n2t.org/ark:/85065/d76977pm https://doi.org/10.1029/2023GL105389 Kuo, Y. author Kim, H. author Lehner, Flavio author UCAR/NCAR - Library publisher The winter-spring precipitation over the Southwestern United States (SWUS) decreased since 1980. It is frequently attributed to Pacific internal decadal variability, but recent studies found anthropogenic aerosols (AA) can also induce a transition to a negative Pacific Decadal Variability (PDV) phase. We revisit the attribution of SWUS drying by quantifying the contributions of anthropogenically forced decadal Pacific Sea Surface Temperatures (SSTs). Applying a low-frequency component analysis to observations, Community Earth System Model version 2 (CESM2) all-forcings and single-forcing large ensembles, we find up to 42% of the observed precipitation trend to be related to the AA-induced negative PDV-like pattern, which is driven by the emission shift from the Western to the Eastern Hemisphere. In CESM2, other radiative forcings counteract the influence of AA, but it remains unclear whether the model correctly simulates this balance. This implies that the near-future trajectories of these forcings, in particular Asian aerosols, are important for projections of SWUS precipitation. 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