edu.ucar.opensky::technotes:44650 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T17:43:29.127854 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.net/ark:/85065/d7d50sfx https://doi.org/10.5065/D6SJ1JCH https Related Dataset #1 The NA-CORDEX dataset https://doi.org/10.5281/ZENODO.11061924 https Related Dataset #2 CRCM5-CMIP6 : A dynamically-downscaled ensemble of CMIP6 simulations. Evaluating the time of occurrence of selected global warming levels for CMIP5 and CMIP6 models 2025-12-01T00:00:00Z publication https://n2t.net/ark:/85065/d7d50sfx https://doi.org/10.5065/c62c-ay86 Tye, Mari author McCrary, Rachel author Stuivenvolt-Allen, Jacob author A. Abdelaal author A. Liel author UCAR/NCAR - Library publisher This technical note explains the rationale for choosing to work with changes in global mean temperature (also known as "Global Warming Levels"; GWL) rather than defined periods in the future. It documents the methodology used to estimate changes in global mean temperature to enable others to reproduce these results for other models. Finally, it presents the estimates of when specific thresholds will be crossed by different models/ensemble members/emissions scenarios in the North American Coordinated Downscaling Experiment (NA-CORDEX) for reference by American Society of Civil Engineers (ASCE) design code developers. The scenarios considered do not include “low emissions” pathways that do not have a potential to reach high GWL. Additional models associated with the Coupled Model Intercomparison Projects v5 and v6 (CMIP5, CMIP6) are included in the Appendices. ASCE has decided to consider a future GWL of 3°C for structures whose design life will end in 2080-2100, referred to throughout as 3GWL. Given the non-linear relationship between temperature and variables such as snow or freezing rain, this technical note also considers a 2°C, or 2GWL. The warmest models in NA-CORDEX cross 2GWL at the start of the simulation period with the earliest ensemble members crossing between 2017-2036, compared to the ensemble mean of 2022-2041. There is one model-emission combination that does not cross the 2GWL threshold prior to 2100. Several model and emission combinations do not cross the 3GWL threshold prior to 2100, although the warmest models cross the threshold between 2036-2055. 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 <style type="text/css"></style><span style="font-family:Arial;font-size:10pt;font-style:normal;" data-sheets-root="1">Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</span> None eng geoscientificInformation