{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:56.885501", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2025-May-02_to_2025-May-05_195.0_-9.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2025050000100}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "May 02 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 05 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 152303.4485868666}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["Cook Islands"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Oceania"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": ["Manihiki Plateau", "Pacific Ocean"]}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -9.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 195.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "195.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 194.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 199.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -11.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -8.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-166.03, -7.97], [-165.5, -7.75], [-164.97, -7.97], [-164.82, -8.32], [-164.5, -8.46], [-164.0, -8.25], [-163.75, -8.35], [-163.5, -8.25], [-163.25, -8.35], [-163.18, -8.32], [-163.03, -7.97], [-162.5, -7.75], [-162.25, -7.85], [-162.0, -7.75], [-161.75, -7.85], [-161.5, -7.75], [-160.97, -7.97], [-160.82, -8.32], [-160.75, -8.35], [-160.5, -8.25], [-159.97, -8.47], [-159.75, -9.0], [-159.97, -9.53], [-160.32, -9.68], [-160.35, -9.75], [-160.25, -10.0], [-160.47, -10.53], [-160.82, -10.68], [-160.97, -11.03], [-161.5, -11.25], [-161.75, -11.15], [-161.82, -11.18], [-161.97, -11.53], [-162.32, -11.68], [-162.47, -12.03], [-163.0, -12.25], [-163.53, -12.03], [-163.68, -11.68], [-163.75, -11.65], [-164.0, -11.75], [-164.25, -11.65], [-164.5, -11.75], [-165.03, -11.53], [-165.18, -11.18], [-165.25, -11.15], [-165.5, -11.25], [-166.03, -11.03], [-166.25, -10.5], [-166.15, -10.25], [-166.18, -10.18], [-166.53, -10.03], [-166.75, -9.5], [-166.65, -9.25], [-166.75, -9.0], [-166.53, -8.47], [-166.18, -8.32], [-166.03, -7.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Pacific-Ocean", "S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-166.25, -10.0], [-166.15, -9.75], [-166.25, -9.5], [-166.15, -9.25], [-166.25, -9.0], [-166.03, -8.47], [-165.5, -8.25], [-165.25, -8.35], [-165.0, -8.25], [-164.5, -8.46], [-164.0, -8.25], [-163.75, -8.35], [-163.5, -8.25], [-163.25, -8.35], [-163.18, -8.32], [-163.03, -7.97], [-162.5, -7.75], [-162.25, -7.85], [-162.0, -7.75], [-161.75, -7.85], [-161.5, -7.75], [-160.97, -7.97], [-160.82, -8.32], [-160.75, -8.35], [-160.5, -8.25], [-159.97, -8.47], [-159.75, -9.0], [-159.97, -9.53], [-160.32, -9.68], [-160.35, -9.75], [-160.25, -10.0], [-160.47, -10.53], [-160.82, -10.68], [-160.97, -11.03], [-161.5, -11.25], [-161.75, -11.15], [-161.82, -11.18], [-161.97, -11.53], [-162.32, -11.68], [-162.47, -12.03], [-163.0, -12.25], [-163.53, -12.03], [-163.68, -11.68], [-163.75, -11.65], [-164.0, -11.75], [-164.25, -11.65], [-164.5, -11.75], [-165.03, -11.53], [-165.18, -11.18], [-165.25, -11.15], [-165.5, -11.25], [-166.03, -11.03], [-166.25, -10.5], [-166.15, -10.25], [-166.25, -10.0]]]]}, "2025-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-166.75, -9.0], [-166.53, -8.47], [-166.18, -8.32], [-166.03, -7.97], [-165.5, -7.75], [-164.97, -7.97], [-164.82, -8.32], [-164.5, -8.46], [-164.0, -8.25], [-163.75, -8.35], [-163.5, -8.25], [-163.25, -8.35], [-163.18, -8.32], [-163.03, -7.97], [-162.5, -7.75], [-162.25, -7.85], [-162.0, -7.75], [-161.75, -7.85], [-161.5, -7.75], [-160.97, -7.97], [-160.82, -8.32], [-160.75, -8.35], [-160.5, -8.25], [-159.97, -8.47], [-159.75, -9.0], [-159.97, -9.53], [-160.32, -9.68], [-160.35, -9.75], [-160.25, -10.0], [-160.47, -10.53], [-160.82, -10.68], [-160.97, -11.03], [-161.5, -11.25], [-161.75, -11.15], [-161.82, -11.18], 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{"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.236814476756308}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.8974881365385511}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.7211370643995, 26.790816446940084, 26.585651448567774, 26.808601633707667]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.539309438069665, 26.649138387044275, 26.365920003255212, 26.675311024983728]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.8876004302485556, -0.8155334143755352, -1.0071655565250046, -0.7823115495957893]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.0887123920297768, -0.9741011347343829, -1.236814476756308, -0.9162000591750825]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5593533119136624, -1.4441233863793794, -1.8141834156050822, -1.360696324751328]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8869291657148168, -1.6848571805426333, -2.2603795674151854, -1.5747222052095997]}}