{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:29.365323", "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": "2022-Dec-04_to_2022-Dec-07_251.5_36.5"}, "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": 2022120001824}, "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": "December 04 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 07 2022"}, "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": 79982.46647261546}, "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": 36.5}, "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": 251.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "251.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 248.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 253.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-112.03, 35.47], [-112.25, 36.0], [-112.03, 36.53], [-111.5, 36.75], [-110.97, 36.53], [-110.82, 36.18], [-110.75, 36.15], [-110.68, 36.18], [-110.65, 36.25], [-110.75, 36.5], [-110.65, 36.75], [-110.75, 37.0], [-110.53, 37.53], [-110.18, 37.68], [-110.03, 38.03], [-109.5, 38.25], [-109.25, 38.15], [-109.0, 38.25], [-108.47, 38.03], [-108.32, 37.68], [-108.25, 37.65], [-108.0, 37.75], [-107.75, 37.65], [-107.5, 37.75], [-107.25, 37.65], [-107.0, 37.75], [-106.47, 37.53], [-106.25, 37.0], [-106.47, 36.47], [-106.82, 36.32], [-106.97, 35.97], [-107.32, 35.82], [-107.46, 35.5], [-107.25, 35.0], [-107.47, 34.47], [-108.0, 34.25], [-108.3, 34.38], [-108.47, 33.97], [-109.0, 33.75], [-109.25, 33.85], [-109.5, 33.75], [-110.03, 33.97], [-110.18, 34.32], [-110.25, 34.35], [-110.5, 34.25], [-110.75, 34.35], [-111.0, 34.25], [-111.53, 34.47], [-111.75, 35.0], [-111.65, 35.25], [-111.68, 35.32], [-112.03, 35.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America", "N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.03, 35.47], [-112.25, 36.0], [-112.03, 36.53], [-111.5, 36.75], [-110.97, 36.53], [-110.82, 36.18], [-110.75, 36.15], [-110.68, 36.18], [-110.65, 36.25], [-110.75, 36.5], [-110.53, 37.03], [-110.18, 37.18], [-110.15, 37.25], [-110.25, 37.5], [-110.03, 38.03], [-109.5, 38.25], [-109.25, 38.15], [-109.0, 38.25], [-108.47, 38.03], [-108.32, 37.68], [-108.25, 37.65], [-108.0, 37.75], [-107.75, 37.65], [-107.5, 37.75], [-107.25, 37.65], [-107.0, 37.75], [-106.47, 37.53], [-106.25, 37.0], [-106.47, 36.47], [-106.82, 36.32], [-106.97, 35.97], [-107.32, 35.82], [-107.46000000000001, 35.5], [-107.25, 35.0], [-107.47, 34.47], [-108.0, 34.25], [-108.30000000000001, 34.38], [-108.47, 33.97], [-109.0, 33.75], [-109.25, 33.85], [-109.5, 33.75], [-110.03, 33.97], [-110.18, 34.32], [-110.25, 34.35], [-110.5, 34.25], [-110.75, 34.35], [-111.0, 34.25], [-111.53, 34.47], [-111.75, 35.0], [-111.65, 35.25], [-111.68, 35.32], [-112.03, 35.47]]]]}, "2022-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.03, 35.47], [-112.25, 36.0], [-112.03, 36.53], [-111.5, 36.75], [-110.97, 36.53], [-110.82, 36.18], [-110.75, 36.15], [-110.68, 36.18], [-110.65, 36.25], [-110.75, 36.5], [-110.65, 36.75], [-110.75, 37.0], [-110.53, 37.53], [-110.18, 37.68], [-110.03, 38.03], [-109.5, 38.25], [-109.25, 38.15], [-109.0, 38.25], [-108.47, 38.03], [-108.32, 37.68], [-108.25, 37.65], [-108.0, 37.75], [-107.75, 37.65], [-107.5, 37.75], [-107.25, 37.65], [-107.0, 37.75], [-106.47, 37.53], [-106.25, 37.0], [-106.47, 36.47], [-106.82, 36.32], [-106.97, 35.97], [-107.32, 35.82], [-107.46000000000001, 35.5], [-107.25, 35.0], [-107.47, 34.47], [-108.0, 34.25], [-108.30000000000001, 34.38], [-108.47, 33.97], [-109.0, 33.75], [-109.25, 33.85], [-109.5, 33.75], [-110.03, 33.97], [-110.18, 34.32], [-110.25, 34.35], [-110.5, 34.25], [-110.75, 34.35], [-111.0, 34.25], [-111.53, 34.47], [-111.75, 35.0], [-111.65, 35.25], [-111.68, 35.32], [-112.03, 35.47]]]]}, "2022-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.03, 35.47], [-112.25, 36.0], [-112.03, 36.53], [-111.5, 36.75], [-110.97, 36.53], [-110.82, 36.18], [-110.75, 36.15], [-110.68, 36.18], [-110.65, 36.25], [-110.75, 36.5], [-110.65, 36.75], [-110.75, 37.0], [-110.53, 37.53], [-110.18, 37.68], [-110.03, 38.03], [-109.5, 38.25], [-109.25, 38.15], [-109.0, 38.25], [-108.47, 38.03], [-108.32, 37.68], [-108.25, 37.65], [-108.0, 37.75], [-107.75, 37.65], [-107.5, 37.75], [-107.25, 37.65], [-107.0, 37.75], [-106.47, 37.53], [-106.25, 37.0], [-106.47, 36.47], [-106.82, 36.32], [-106.97, 35.97], [-107.32, 35.82], [-107.46000000000001, 35.5], [-107.25, 35.0], [-107.47, 34.47], [-108.0, 34.25], [-108.30000000000001, 34.38], [-108.47, 33.97], [-109.0, 33.75], [-109.25, 33.85], [-109.5, 33.75], [-110.03, 33.97], [-110.18, 34.32], [-110.25, 34.35], [-110.5, 34.25], [-110.75, 34.35], [-111.0, 34.25], [-111.53, 34.47], [-111.75, 35.0], [-111.65, 35.25], [-111.68, 35.32], [-112.03, 35.47]]]]}, "2022-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-111.0, 34.75], [-111.53, 34.97], [-111.75, 35.5], [-111.53, 36.03], [-111.0, 36.25], [-110.47, 36.03], [-110.25, 35.5], [-110.47, 34.97], [-111.0, 34.75]]], [[[-110.75, 37.0], [-110.53, 37.53], [-110.18, 37.68], [-110.03, 38.03], [-109.5, 38.25], [-109.25, 38.15], [-109.0, 38.25], [-108.47, 38.03], [-108.32, 37.68], [-108.25, 37.65], [-108.0, 37.75], [-107.75, 37.65], [-107.5, 37.75], [-107.25, 37.65], [-107.0, 37.75], [-106.47, 37.53], [-106.25, 37.0], [-106.47, 36.47], [-107.0, 36.25], [-107.25, 36.35], [-107.5, 36.25], [-107.75, 36.35], [-107.82, 36.32], [-107.97, 35.97], [-108.5, 35.75], [-109.0, 35.96], [-109.5, 35.75], [-110.03, 35.97], [-110.18, 36.32], [-110.53, 36.47], [-110.75, 37.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 8.053634402781256}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 6.343101875384377}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.789259083238164, 7.628992118541646, 6.69570811468725, 5.079235792902978]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.205554580659452, 10.482377401643816, 9.189930672840262, 8.283331179132176]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [6.696572503822596, 6.65538603810997, 5.980094546051973, 5.565231196203797]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [8.053634402781256, 7.560068212353883, 7.542298138184947, 6.042575108853271]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.525669171690935, 1.5554785412234775, 1.4357666551383734, 1.3453777578551624]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.8171838066193096, 1.793861280950274, 2.00991725107555, 1.5353546959082847]}}