{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:21:25.517161", "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": "2020-Sep-30_to_2020-Oct-05_277.5_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": 2020090000771}, "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 30 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 05 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 51126.71819909623}, "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": ["E.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": ["Gulf of Mexico", "North Atlantic Ocean"]}, "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": 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": 276.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 279.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.03, 29.47], [-84.25, 30.0], [-84.03, 30.53], [-83.5, 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[-80.47, 28.47], [-80.82, 28.32], [-80.97, 27.97], [-81.5, 27.75], [-81.75, 27.85], [-82.0, 27.75], [-82.25, 27.85], [-82.5, 27.75], [-83.03, 27.97], [-83.25, 28.5], [-83.15, 28.75], [-83.25, 29.0], [-83.15, 29.25], [-83.18, 29.32], [-83.25, 29.35], [-83.5, 29.25], [-84.03, 29.47]]]]}, "2020-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.03, 29.47], [-84.25, 30.0], [-84.03, 30.53], [-83.5, 30.75], [-83.25, 30.65], [-83.0, 30.75], [-82.75, 30.65], [-82.5, 30.75], [-82.2, 30.62], [-82.03, 31.03], [-81.5, 31.25], [-81.25, 31.15], [-81.0, 31.25], [-80.47, 31.03], [-80.25, 30.5], [-80.35, 30.25], [-80.25, 30.0], [-80.35, 29.75], [-80.25, 29.5], [-80.35, 29.25], [-80.25, 29.0], [-80.47, 28.47], [-80.82, 28.32], [-80.97, 27.97], [-81.5, 27.75], [-81.75, 27.85], [-82.0, 27.75], [-82.25, 27.85], [-82.5, 27.75], [-83.03, 27.97], [-83.25, 28.5], [-83.15, 28.75], [-83.25, 29.0], [-83.15, 29.25], [-83.18, 29.32], [-83.25, 29.35], [-83.5, 29.25], [-84.03, 29.47]]]]}, 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[-82.75, 29.5], [-82.97, 28.97], [-83.5, 28.75], [-84.03, 28.97], [-84.25, 29.5], [-84.03, 30.03], [-83.5, 30.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.514966052841999}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.635408385686795}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.3976488642636, 21.2187890931188, 21.851110849017346, 20.167081730397342, 20.302208916334394, 21.41758659934078]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.558925269981785, 19.006249294054328, 20.152374751608647, 19.172163363370316, 19.771197443423375, 21.41758659934078]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": 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