{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:32:34.340618", "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-Sep-25_to_2022-Sep-28_240.0_44.5"}, "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": 2022090002566}, "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": "September 25 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 28 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": 50379.7062129272}, "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": ["W.North-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": 44.5}, "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": 240.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "240.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 237.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 242.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 42.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.03, 46.53], [-122.5, 46.75], [-122.25, 46.65], [-122.0, 46.75], [-121.47, 46.53], [-121.32, 46.18], [-121.25, 46.15], [-121.0, 46.25], [-120.47, 46.03], [-120.25, 45.5], [-120.43, 45.07], [-120.0, 45.25], [-119.47, 45.03], [-119.25, 44.5], [-119.47, 43.97], [-120.0, 43.75], [-120.53, 43.97], [-120.75, 44.5], [-120.57, 44.93], [-121.0, 44.75], [-121.25, 44.85], [-121.5, 44.75], [-121.75, 44.85], [-122.0, 44.75], [-122.25, 44.85], [-122.5, 44.75], [-123.03, 44.97], [-123.25, 45.5], [-123.15, 45.75], [-123.25, 46.0], [-123.03, 46.53]]]]}, "2022-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.03, 46.53], [-122.5, 46.75], [-122.25, 46.65], [-122.0, 46.75], [-121.47, 46.53], [-121.32, 46.18], [-121.25, 46.15], [-121.18, 46.18], [-121.15, 46.25], [-121.25, 46.5], [-121.03, 47.03], [-120.5, 47.25], [-119.97, 47.03], [-119.75, 46.5], [-119.85, 46.25], [-119.82, 46.18], [-119.47, 46.03], [-119.32, 45.68], [-119.25, 45.65], [-119.0, 45.75], [-118.75, 45.65], [-118.5, 45.75], [-118.25, 45.65], [-118.0, 45.75], [-117.47, 45.53], [-117.25, 45.0], [-117.35, 44.75], [-117.25, 44.5], [-117.47, 43.97], [-118.0, 43.75], [-118.43, 43.93], [-118.25, 43.5], [-118.47, 42.97], [-118.82, 42.82], [-118.97, 42.47], [-119.5, 42.25], [-120.03, 42.47], [-120.25, 43.0], [-120.15, 43.25], [-120.18, 43.32], [-120.25, 43.35], [-120.5, 43.25], [-121.03, 43.47], [-121.25, 44.0], [-121.15, 44.25], [-121.25, 44.5], [-121.12, 44.8], [-121.25, 44.85], [-121.5, 44.75], [-121.75, 44.85], [-122.0, 44.75], [-122.25, 44.85], [-122.5, 44.75], [-123.03, 44.97], [-123.25, 45.5], [-123.15, 45.75], [-123.25, 46.0], [-123.03, 46.53]], [[-118.82, 44.32], [-118.85, 44.25], [-118.82, 44.18], [-118.57, 44.07], [-118.68, 44.32], [-118.75, 44.35], [-118.82, 44.32]]]]}, "2022-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.03, 46.53], [-122.5, 46.75], [-122.25, 46.65], [-122.0, 46.75], [-121.47, 46.53], [-121.32, 46.18], [-121.25, 46.15], [-121.18, 46.18], [-121.15, 46.25], [-121.25, 46.5], [-121.03, 47.03], [-120.5, 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"description": "Maximum t2m anomaly recorded over entire duration", "value": 8.327387200742066}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 6.201267396425773}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.165391935697926, 19.114050817382747, 20.185326752860362, 19.207766471745174]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.803910642799565, 21.881719260909733, 22.957244671282183, 21.91421691603631]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.556823694144279, 5.724808468886895, 7.043173306909627, 6.383963002792598]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.684450192738552, 7.35127072763953, 8.327387200742066, 7.684115338162485]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.412068496967113, 1.5509495741954822, 1.8693474066867655, 1.5802888168866307]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4965623293597554, 2.283661137292572, 2.2929646755140682, 1.8623540995890495]}}