{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:08.550109", "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": "2021-Aug-18_to_2021-Aug-25_268.5_29.5"}, "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": 2021080002578}, "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": "August 18 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 25 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 79851.40439435451}, "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": 29.5}, "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": 268.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "268.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 267.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 271.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-92.25, 30.15], [-92.18, 30.18], [-92.03, 30.53], [-91.62, 30.7], [-91.75, 31.0], [-91.53, 31.53], [-91.12, 31.7], [-91.25, 32.0], [-91.03, 32.53], [-90.5, 32.75], [-90.25, 32.65], [-90.0, 32.75], [-89.5, 32.54], [-89.0, 32.75], [-88.47, 32.53], [-88.32, 32.18], [-87.97, 32.03], [-87.75, 31.5], [-87.85, 31.25], [-87.75, 31.0], [-87.97, 30.47], [-88.32, 30.32], [-88.35, 30.25], [-88.25, 30.0], [-88.47, 29.47], [-88.82, 29.32], [-88.97, 28.97], [-89.5, 28.75], [-89.75, 28.85], [-90.0, 28.75], [-90.25, 28.85], [-90.5, 28.75], [-90.75, 28.85], [-91.0, 28.75], [-91.25, 28.85], [-91.5, 28.75], [-91.75, 28.85], [-92.0, 28.75], [-92.25, 28.85], [-92.5, 28.75], [-93.03, 28.97], [-93.25, 29.5], [-93.03, 30.03], [-92.5, 30.25], [-92.25, 30.15]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.0, 28.75], [-91.52999999999997, 28.97], [-91.75, 29.5], [-91.52999999999997, 30.03], [-91.0, 30.25], [-90.75, 30.15], [-90.5, 30.25], [-90.25, 30.15], [-90.0, 30.25], [-89.47000000000003, 30.03], [-89.25, 29.5], [-89.47000000000003, 28.97], [-90.0, 28.75], [-90.25, 28.85], [-90.5, 28.75], [-90.75, 28.85], [-91.0, 28.75]]]]}, "2021-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.0, 28.75], [-91.52999999999997, 28.97], [-91.75, 29.5], [-91.52999999999997, 30.03], [-91.0, 30.25], [-90.75, 30.15], [-90.5, 30.25], [-90.25, 30.15], [-90.0, 30.25], [-89.47000000000003, 30.03], [-89.25, 29.5], [-89.47000000000003, 28.97], [-90.0, 28.75], [-90.25, 28.85], [-90.5, 28.75], [-90.75, 28.85], [-91.0, 28.75]]]]}, "2021-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.5, 28.75], [-92.02999999999997, 28.97], [-92.25, 29.5], [-92.02999999999997, 30.03], [-91.5, 30.25], [-91.25, 30.15], [-91.0, 30.25], [-90.75, 30.15], [-90.5, 30.25], [-90.25, 30.15], [-90.0, 30.25], [-89.47000000000003, 30.03], [-89.25, 29.5], [-89.47000000000003, 28.97], [-90.0, 28.75], [-90.25, 28.85], [-90.5, 28.75], [-90.75, 28.85], [-91.0, 28.75], [-91.25, 28.85], [-91.5, 28.75]]]]}, "2021-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.02999999999997, 30.03], [-91.5, 30.25], [-90.97000000000003, 30.03], [-90.75, 29.5], [-90.97000000000003, 28.97], [-91.5, 28.75], [-92.02999999999997, 28.97], [-92.25, 29.5], [-92.02999999999997, 30.03]]]]}, "2021-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-92.02999999999997, 30.53], [-91.62, 30.7], [-91.75, 31.0], [-91.52999999999997, 31.53], [-91.12, 31.7], [-91.25, 32.0], [-91.02999999999997, 32.53], [-90.5, 32.75], [-89.97000000000003, 32.53], [-89.82, 32.18], [-89.75, 32.15], [-89.5, 32.25], [-89.25, 32.15], [-89.0, 32.25], [-88.47000000000003, 32.03], [-88.32, 31.68], [-87.97000000000003, 31.53], [-87.75, 31.0], [-87.97000000000003, 30.47], [-88.32, 30.32], 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daily evolution of mean t2m anomalies.", "value": [1.7522034184210422, 1.6665416624473248, 1.6920265360925413, 1.8693713803117475, 2.1298489501650395, 2.5105102829554222, 2.277003892846112, 2.278152058225409]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.9292810776124156, 1.8628127580114437, 1.7838203322677941, 1.8693713803117475, 2.6833450517024175, 3.23358823597016, 3.147011602707778, 2.8681580909434388]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3899537313968182, 1.3635476225837817, 1.4079308761603733, 1.5216507875093626, 1.5685088528172897, 1.8545241490868642, 1.6517763411952844, 1.4906855341975644]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4801962838591134, 1.4323323206683574, 1.473426135463633, 1.5216507875093626, 2.0509698903621425, 2.625436279654503, 2.6486050448209646, 1.7271496112187958]}}