{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:22.937374", "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-Oct-02_to_2025-Oct-05_258.0_35.5"}, "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": 2025100001092}, "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": "October 02 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 52111.18812687438}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 35.5}, "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": 258.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "258.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 256.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 258.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-101.25, 35.5], [-101.47, 34.97], [-102.0, 34.75], [-102.25, 34.85], [-102.5, 34.75], [-102.75, 34.85], [-103.0, 34.75], [-103.25, 34.85], [-103.5, 34.75], [-104.03, 34.97], [-104.18, 35.32], [-104.53, 35.47], [-104.75, 36.0], [-104.65, 36.25], [-104.75, 36.5], [-104.53, 37.03], [-104.0, 37.25], [-103.7, 37.12], [-103.53, 37.53], [-103.18, 37.68], [-103.15, 37.75], [-103.25, 38.0], [-103.03, 38.53], [-102.5, 38.75], [-102.25, 38.65], [-102.0, 38.75], [-101.47, 38.53], [-101.32, 38.18], [-100.97, 38.03], [-100.75, 37.5], [-100.85, 37.25], [-100.75, 37.0], [-100.85, 36.75], [-100.75, 36.5], [-100.97, 35.97], [-101.32, 35.82], [-101.35, 35.75], [-101.25, 35.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.0, 34.75], [-102.52999999999997, 34.97], [-102.75, 35.5], [-102.52999999999997, 36.03], [-102.0, 36.25], [-101.47000000000003, 36.03], [-101.25, 35.5], [-101.47000000000003, 34.97], [-102.0, 34.75]]], [[[-104.0, 35.75], [-104.53, 35.97], [-104.75, 36.5], [-104.53, 37.03], [-104.0, 37.25], [-103.47000000000003, 37.03], [-103.25, 36.5], [-103.47000000000003, 35.97], [-104.0, 35.75]]]]}, "2025-10-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.75, 36.5], [-104.53, 37.03], [-104.0, 37.25], [-103.69999999999999, 37.12], [-103.52999999999997, 37.53], [-103.18, 37.68], [-103.14999999999998, 37.75], [-103.25, 38.0], [-103.02999999999997, 38.53], [-102.5, 38.75], [-102.25, 38.65], [-102.0, 38.75], [-101.47000000000003, 38.53], [-101.32, 38.18], [-100.97000000000003, 38.03], [-100.75, 37.5], [-100.85000000000002, 37.25], [-100.75, 37.0], [-100.85000000000002, 36.75], [-100.75, 36.5], [-100.97000000000003, 35.97], [-101.32, 35.82], [-101.35000000000002, 35.75], [-101.25, 35.5], [-101.47000000000003, 34.97], [-102.0, 34.75], [-102.25, 34.85], [-102.5, 34.75], [-102.75, 34.85], [-103.0, 34.75], [-103.25, 34.85], [-103.5, 34.75], [-104.03, 34.97], [-104.18, 35.32], [-104.53, 35.47], [-104.75, 36.0], [-104.65, 36.25], [-104.75, 36.5]]]]}, "2025-10-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.75, 36.5], [-104.53, 37.03], [-104.0, 37.25], [-103.69999999999999, 37.12], [-103.52999999999997, 37.53], [-103.18, 37.68], [-103.14999999999998, 37.75], [-103.25, 38.0], [-103.02999999999997, 38.53], [-102.5, 38.75], [-102.25, 38.65], [-102.0, 38.75], [-101.47000000000003, 38.53], [-101.32, 38.18], [-100.97000000000003, 38.03], [-100.75, 37.5], [-100.85000000000002, 37.25], [-100.75, 37.0], [-100.85000000000002, 36.75], [-100.75, 36.5], [-100.97000000000003, 35.97], [-101.32, 35.82], [-101.35000000000002, 35.75], [-101.25, 35.5], [-101.47000000000003, 34.97], [-102.0, 34.75], [-102.25, 34.85], [-102.5, 34.75], [-102.75, 34.85], [-103.0, 34.75], [-103.25, 34.85], [-103.5, 34.75], [-104.03, 34.97], [-104.18, 35.32], [-104.53, 35.47], [-104.75, 36.0], [-104.65, 36.25], [-104.75, 36.5]]]]}, "2025-10-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.53, 35.47], [-104.75, 36.0], [-104.53, 36.53], [-104.0, 36.75], [-103.75, 36.65], [-103.62, 36.7], [-103.75, 37.0], [-103.52999999999997, 37.53], [-103.18, 37.68], [-103.14999999999998, 37.75], [-103.25, 38.0], [-103.02999999999997, 38.53], [-102.5, 38.75], [-102.25, 38.65], [-102.0, 38.75], [-101.47000000000003, 38.53], [-101.32, 38.18], [-100.97000000000003, 38.03], [-100.75, 37.5], [-100.85000000000002, 37.25], [-100.75, 37.0], [-100.85000000000002, 36.75], [-100.75, 36.5], [-100.97000000000003, 35.97], [-101.32, 35.82], [-101.35000000000002, 35.75], [-101.25, 35.5], [-101.47000000000003, 34.97], [-102.0, 34.75], [-102.25, 34.85], [-102.5, 34.75], [-102.75, 34.85], [-103.0, 34.75], [-103.25, 34.85], [-103.5, 34.75], [-104.03, 34.97], [-104.18, 35.32], [-104.53, 35.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 9.045219499508903}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.496878716414655}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.20465749104818, 22.81200603908968, 22.801514773898703, 22.4058662414551]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.12604420979818, 24.61617813110354, 25.603381093343103, 23.809634145100915]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.544683742637034, 5.25095008655739, 5.713998051159505, 5.622347973660453]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.909511482151117, 6.783888585516877, 9.045219499508903, 6.893365431559403]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4138503342142472, 1.4195297260146718, 1.4637080267619478, 1.3565010573451497]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4519799616531797, 1.64471325836069, 2.083933923975126, 1.5058837451223892]}}