{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:10.204193", "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-Jul-12_to_2025-Jul-15_259.5_32.0"}, "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": 2025070000541}, "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": "July 12 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 15 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": 52876.04327178708}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "N.Central-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": []}, "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": 32.0}, "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": 259.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "259.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 260.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.5, 32.75], [-99.97, 32.53], [-99.75, 32.0], [-99.97, 31.47], [-100.5, 31.25], [-101.03, 31.47], [-101.25, 32.0], [-101.03, 32.53], [-100.5, 32.75]]]]}, "2025-07-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.15, 31.25], [-102.25, 31.5], [-102.03, 32.03], [-101.68, 32.18], [-101.53, 32.53], [-101.0, 32.75], [-100.75, 32.65], [-100.68, 32.68], [-100.53, 33.03], [-100.0, 33.25], [-99.47, 33.03], [-99.32, 32.68], [-98.97, 32.53], [-98.75, 32.0], [-98.85, 31.75], [-98.75, 31.5], [-98.97, 30.97], [-99.32, 30.82], [-99.35, 30.75], [-99.25, 30.5], [-99.35, 30.25], [-99.25, 30.0], [-99.47, 29.47], [-100.0, 29.25], [-100.5, 29.46], [-101.0, 29.25], [-101.53, 29.47], [-101.68, 29.82], [-102.03, 29.97], [-102.25, 30.5], [-102.15, 30.75], [-102.25, 31.0], [-102.15, 31.25]]]]}, "2025-07-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.15, 31.25], [-102.25, 31.5], [-102.03, 32.03], [-101.68, 32.18], [-101.53, 32.53], [-101.0, 32.75], [-100.75, 32.65], [-100.68, 32.68], [-100.53, 33.03], [-100.0, 33.25], [-99.47, 33.03], [-99.32, 32.68], [-98.97, 32.53], [-98.75, 32.0], [-98.85, 31.75], [-98.75, 31.5], [-98.97, 30.97], [-99.32, 30.82], [-99.35, 30.75], [-99.25, 30.5], [-99.35, 30.25], [-99.25, 30.0], [-99.47, 29.47], [-100.0, 29.25], [-100.5, 29.46], [-101.0, 29.25], [-101.53, 29.47], [-101.68, 29.82], [-102.03, 29.97], [-102.25, 30.5], [-102.15, 30.75], [-102.25, 31.0], [-102.15, 31.25]]]]}, "2025-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.15, 31.25], [-102.25, 31.5], [-102.03, 32.03], [-101.68, 32.18], [-101.53, 32.53], [-101.0, 32.75], [-100.75, 32.65], [-100.68, 32.68], [-100.53, 33.03], [-100.0, 33.25], [-99.47, 33.03], [-99.32, 32.68], [-98.97, 32.53], [-98.75, 32.0], [-98.85, 31.75], [-98.75, 31.5], [-98.97, 30.97], [-99.32, 30.82], [-99.35, 30.75], [-99.25, 30.5], [-99.35, 30.25], [-99.25, 30.0], [-99.47, 29.47], [-100.0, 29.25], [-100.5, 29.46], [-101.0, 29.25], [-101.53, 29.47], [-101.68, 29.82], [-102.03, 29.97], [-102.25, 30.5], [-102.15, 30.75], [-102.25, 31.0], [-102.15, 31.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.122529892617308}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.831053394710941}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.453792826334677, 24.4123700459798, 24.826934814453125, 24.91265920003258]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.453792826334677, 23.766255950927757, 23.893080647786462, 23.833411153157556]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1023388995582195, -4.0742934998849565, -3.739960124275959, -3.7153422847295445]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1023388995582195, -5.122529892617308, -4.470162782741681, -4.524368380398641]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4166192327634555, -1.933998716919009, -1.7938387026565557, -1.7712210520258034]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4166192327634555, -2.3795283022135347, -2.192633629961108, -2.25615085433285]}}