{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:42.232482", "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": "2023-Jun-07_to_2023-Jun-11_277.5_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": 2023060000334}, "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": "June 07 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 11 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 92986.94566888214}, "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": 277.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "277.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 276.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 281.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.5}, "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": [[[[-83.75, 36.0], [-83.65, 36.25], [-83.75, 36.5], [-83.53, 37.03], [-83.0, 37.25], [-82.75, 37.15], [-82.68, 37.18], 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["E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.0, 35.75], [-83.52999999999997, 35.97], [-83.75, 36.5], [-83.52999999999997, 37.03], [-83.0, 37.25], [-82.75, 37.15], [-82.68, 37.18], [-82.52999999999997, 37.53], [-82.0, 37.75], [-81.75, 37.65], [-81.5, 37.75], [-80.97000000000003, 37.53], [-80.82, 37.18], [-80.75, 37.15], [-80.5, 37.25], [-79.97000000000003, 37.03], [-79.82, 36.68], [-79.75, 36.65], [-79.5, 36.75], [-79.25, 36.65], [-79.0, 36.75], [-78.47000000000003, 36.53], [-78.25, 36.0], [-78.47000000000003, 35.47], [-79.0, 35.25], [-79.25, 35.35], [-79.32, 35.32], [-79.47000000000003, 34.97], [-80.0, 34.75], [-80.52999999999997, 34.97], [-80.68, 35.32], [-80.75, 35.35], [-81.0, 35.25], [-81.25, 35.35], [-81.5, 35.25], [-81.75, 35.35], [-82.0, 35.25], [-82.52999999999997, 35.47], [-82.68, 35.82], [-82.75, 35.85], [-83.0, 35.75]]]]}, "2023-06-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.75, 36.0], [-83.64999999999998, 36.25], [-83.75, 36.5], [-83.52999999999997, 37.03], [-83.0, 37.25], [-82.75, 37.15], [-82.68, 37.18], [-82.52999999999997, 37.53], [-82.0, 37.75], [-81.75, 37.65], [-81.5, 37.75], [-81.25, 37.65], [-81.18, 37.68], [-81.02999999999997, 38.03], [-80.5, 38.25], [-79.97000000000003, 38.03], [-79.75, 37.5], [-79.95999999999998, 37.0], [-79.82, 36.68], [-79.75, 36.65], [-79.5, 36.75], [-79.25, 36.65], [-79.0, 36.75], [-78.47000000000003, 36.53], [-78.25, 36.0], [-78.47000000000003, 35.47], [-79.0, 35.25], [-79.25, 35.35], [-79.32, 35.32], [-79.35000000000002, 35.25], [-79.25, 35.0], [-79.47000000000003, 34.47], [-80.0, 34.25], [-80.25, 34.35], [-80.5, 34.25], [-80.75, 34.35], [-80.82, 34.32], [-80.87, 34.2], [-80.47000000000003, 34.03], [-80.25, 33.5], [-80.47000000000003, 32.97], [-81.0, 32.75], [-81.25, 32.85], [-81.5, 32.75], 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daily evolution of mean t2m.", "value": [16.915145223696584, 17.334689174745563, 17.611694372303134, 18.862658589303408, 19.16166725153414]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.84447434354496, 12.551709140326295, 12.85559503812783, 15.18626133443172, 15.784851791876463]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.053453082283205, -4.432256960917104, -4.544947346311185, -3.56279715678285, -3.294068360530131]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.703204121450426, -5.779064432659766, -5.750433941430231, -4.352416678211114, -3.684898771127166]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4601166343900516, -1.7181271906649855, -1.8566061738196704, -1.4820797571680795, -1.4398799133272802]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.609048814208475, -2.314723282654111, -2.363636951011948, -1.851430632389531, -1.62745859649903]}}