{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:21:58.017242", "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-Jul-20_to_2022-Jul-29_272.5_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": 2022070002574}, "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 20 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 29 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 10}, "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": 58794.09684668809}, "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": 272.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "272.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 271.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 274.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-88.5, 34.25], [-88.25, 34.15], [-88.18, 34.18], [-88.15, 34.25], [-88.25, 34.5], [-88.12, 34.8], [-88.53, 34.97], [-88.68, 35.32], [-89.03, 35.47], [-89.25, 36.0], [-89.03, 36.53], [-88.68, 36.68], [-88.53, 37.03], [-88.0, 37.25], [-87.47, 37.03], [-87.25, 36.5], [-87.37, 36.2], [-87.29, 36.17], [-87.25, 36.15], [-87.0, 36.25], [-86.47, 36.03], [-86.32, 35.68], [-85.97, 35.53], [-85.82, 35.18], [-85.47, 35.03], [-85.25, 34.5], [-85.35, 34.25], [-85.25, 34.0], [-85.47, 33.47], [-85.82, 33.32], [-85.97, 32.97], [-86.32, 32.82], [-86.35, 32.75], [-86.25, 32.5], [-86.47, 31.97], [-87.0, 31.75], [-87.25, 31.85], [-87.5, 31.75], [-88.03, 31.97], [-88.25, 32.5], [-88.15, 32.75], [-88.18, 32.82], [-88.25, 32.85], [-88.5, 32.75], [-89.03, 32.97], [-89.25, 33.5], [-89.03, 34.03], [-88.5, 34.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-07-20T11:30:00.000000000": {"type": 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[-86.97000000000003, 36.03], [-86.75, 35.5], [-86.97000000000003, 34.97], [-87.5, 34.75], [-87.75, 34.85], [-88.0, 34.75], [-88.52999999999997, 34.97], [-88.75, 35.5], [-88.54000000000002, 36.0], [-88.75, 36.5]]]]}, "2022-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-89.02999999999997, 35.47], [-89.25, 36.0], [-89.02999999999997, 36.53], [-88.68, 36.68], [-88.52999999999997, 37.03], [-88.0, 37.25], [-87.47000000000003, 37.03], [-87.25, 36.5], [-87.37, 36.2], [-87.25, 36.15], [-87.0, 36.25], [-86.47000000000003, 36.03], [-86.25, 35.5], [-86.47000000000003, 34.97], [-87.0, 34.75], [-87.25, 34.85], [-87.5, 34.75], [-87.75, 34.85], [-88.0, 34.75], [-88.52999999999997, 34.97], [-88.68, 35.32], [-89.02999999999997, 35.47]]]]}, "2022-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-89.02999999999997, 35.47], [-89.25, 36.0], [-89.02999999999997, 36.53], [-88.5, 36.75], [-87.97000000000003, 36.53], [-87.82, 36.18], [-87.75, 36.15], [-87.5, 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4.9141968250823425}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.9245885893260106}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.122125440600485, 30.953018881977016, 29.828637434446193, 29.994713693035237, 29.436353300430255, 29.514889914568016, 28.24491275465283, 29.32168686074931, 30.05583366649421, 29.25766804260553]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [30.41461610507332, 32.02901578036676, 30.221104863690016, 30.764359573098034, 30.26930072656694, 30.191184613246264, 28.24491275465283, 30.84522511483783, 31.087821740057223, 30.257170895306047]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.1019742524658227, 3.9696164931028384, 2.8605756320907667, 3.1388053321653957, 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