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wdc-climate.de:5285837 eng; USA collection nextGEMS_ExtrInd Lukas Brunner University of Hamburg https://www.uni-hamburg.de/ pointOfContact 2025-05-21T08:18:52 ISO 19115 ISO 19115-2:2009 Annual ETCCDI Extreme Indices For ICON-Sapphire And IFS-FESOM (nextGEMS Cycle 4) 2025-06-12 publication 1 nextGEMS_ExtrInd doi:10.26050/WDCC/nextGEMS_ExtrInd Lukas Brunner University of Hamburg https://www.uni-hamburg.de/ Email: lukas.brunner@uni-hamburg.de principalInvestigator Lukas Brunner University of Hamburg https://www.uni-hamburg.de/ Email: lukas.brunner@uni-hamburg.de author WDCC publisher ETCCDI indices calculated from two km-scale global models developed within the nextGEMS project (https://nextgems-h2020.eu/): ICON-Sapphire (Hohenegger et al. 2023) and IFS-FESOM (Rackow et al. 2025). The indices are based on the 30-year production simulations of nextGEMS, cycle 4 with a spatial resolution of about 10km (Segura et al. 2025). Here, we provide them in the 29-year period 2021-2049 (as the first year, 2020, is incomplete for IFS), driven by the high-emission pathway SSP3-7.0. The original data and the derived indices are available on the unstructured HEALPix grid (Górski et al. 2005). HEALPix organises data at discrete resolutions or zoom levels. Here, the highest resolved zoom level 9 (about 13km grid spacing corresponding to about 3 million grid cells globally) and the intermediate (“CMIP6-like”) zoom level 6 (about 102km, 50’000 grid cells) are provided. The data were processed by Lukas Brunner (https://orcid.org/0000-0001-5760-4524), using a Climate Data Operators (https://code.mpimet.mpg.de/projects/cdo/embedded/index.html) implementation of the ETCCID indices: code on GitHub (https://doi.org/10.5281/zenodo.15582463). Time-mean plots of all indices are available on Zenodo: https://doi.org/10.5281/zenodo.15613611 If you use the indices, please cite this dataset and the accompanying publication: Brunner L., B. Poschlod, E. Dutra, E. M. Fischer, O. Martius, and J. Sillmann (2025): A global perspective on the spatial representation of climate extremes from km-scale models. Environmental Research Letters, https://doi.org/10.1088/1748-9326/ade1ef Lukas Brunner University of Hamburg https://www.uni-hamburg.de/ pointOfContact NetCDF CLICCS ICON IFS climate extrem indices nextGEMS CC-BY-4.0: Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ eng; USA 0.0 360.0 -90.0 90.0 365_day 2021-01-01 2049-12-31 info:eu-repo/grantAgreement/DFG//390683824/DE//EXC 2037: Climate, Climatic Change, and Society (CLICCS) info:eu-repo/grantAgreement/EC/H2020/101003470/BE//Next Generation Earth Modelling Systems (NextGEMS) air_temperature (warmest daily maximum) not filled; unit: K Number of tropical nights Count of days when TN (daily minimum temperature) is above 20 degree Celsius per time period. Let TNij be daily minimum temperature on day i in year j. Count the number of days where: TNij is above 20 degree Celsius. For annual see: [ETCCDI/CRD Climate Change Indices]; unit: day Amount of hot days not filled; unit: 1 air_temperature (maximum 90th percentile) not filled; unit: K Amount of warm nights not filled; unit: 1 highest_one_day_precipitation_amount-per_time_period Maximum 1-day preciptitation amount. highest one day precipitation is the maximum of one day precipitation amount in a given time period. The time period should be defined by the bounds of the time coordinate. [CF-Guidelines for construction]; unit: mm d-1 Number of summer days Annual count of days when TX (daily maximum temperature) is above 25 degree Celsius. Let TXij be daily maximum temperature on day i in year j. Count the number of days where: TXij is above 25 degree Celsius. [ETCCDI/CRD Climate Change Indices]; unit: day air_temperature (coldest daily minimum) not filled; unit: K number_of_very_heavy_precipitation_days Annual or seasonal count of days when PRCP is greater than or equal to 20mm: Let RRij be the daily precipitation amount on day i in period j. Count the number of days where: RRij is greater than or equal to 20mm. For annual see: [ETCCDI/CRD Climate Change Indices]; unit: day air_temperature Air temperature is the bulk temperature of the air, not the surface (skin) temperature. [CF-Standard Name]; unit: K number_of_heavy_precipitation_days Annual or seasonal count of days when PRCP is greater than or equal to 10mm: Let RRij be the daily precipitation amount on day i in period j. Count the number of days where: RRij is greater than or equal to 10mm. For annual see: [ETCCDI/CRD Climate Change Indices]; unit: day Warm spell duration index Annual count of days with at least 6 consecutive days when TX > 90th percentile of reference period [ETCCDI/CRD Climate Change Indices]; unit: day Wet spell duration index not filled; unit: day highest_five_day_precipitation_amount-per_time_period highest precipitation amount for five day interval (including the calendar day as the last day) Maximum 5-day preciptitation amount [CF-Guidelines for construction]; unit: mm d-1 air_temperature (hottest daily maximum) not filled; unit: K precpitation_amount_from_wet_days_above_threshold not filled; unit: mm d-1 Cold spell duration index Annual count of days with at least 6 consecutive days when TN < 10th percentile of reference period [ETCCDI/CRD Climate Change Indices]; unit: day precipitation_flux In accordance with common usage in geophysical disciplines, "flux" implies per unit area, called "flux density" in physics. [CF-Standard Name]; unit: mm d-1 precipitation_amount-from_very_heavy_rain_days not filled; unit: mm d-1 Number of frost days Annual count of days when TN (daily minimum temperature) is below 0 degree Celsius. Let TNijbe daily minimum temperature on day i in year j. Count the number of days where: TNij is below 0 degree Celsius. [ETCCDI/CRD Climate Change Indices]; unit: day air_temperature (minimum 90th percentile) not filled; unit: K Amount of cold nights not filled; unit: 1 air_temperature (minimum 10th percentile) not filled; unit: K air_temperature (maximum 10th percentile) not filled; unit: K simple_precipitation_intensity_index not filled; unit: mm d-1 Amount of cool days not filled; unit: 1 precipitation_amount-from_heavy_rain_days not filled; unit: mm d-1 Dry spell duration index not filled; unit: day Number of icing days Annual count of days when TX (daily maximum temperature) is below 0 degree Celsius. Let TXij be daily maximum temperature on day i in year j. Count the number of days where: TXij is below 0 degree Celsius. [ETCCDI/CRD Climate Change Indices]; unit: day air_temperature (coldest daily maximum) not filled; unit: K NetCDF 870445 https://www.wdc-climate.de/ui/entry?acronym=nextGEMS_ExtrInd information collection