{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:17.430365", "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-May-24_to_2023-May-26_258.5_78.0"}, "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": 2023050000749}, "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": "May 24 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 26 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 74787.81295118287}, "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": ["Canada"]}, "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": 78.0}, "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": 258.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "258.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 257.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 269.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 75.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 78.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-103.75, 77.0], [-103.53, 77.53], [-103.18, 77.68], [-103.03, 78.03], [-102.5, 78.25], [-102.25, 78.15], [-102.18, 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[-93.2, 74.88], [-93.32, 74.82], [-93.47, 74.47], [-94.0, 74.25], [-94.53, 74.47], [-94.68, 74.82], [-94.75, 74.85], [-95.0, 74.75], [-95.25, 74.85], [-95.5, 74.75], [-95.75, 74.85], [-96.0, 74.75], [-96.53, 74.97], [-96.75, 75.5], [-96.57, 75.93], [-96.82, 75.82], [-96.97, 75.47], [-97.32, 75.32], [-97.47, 74.97], [-98.0, 74.75], [-98.25, 74.85], [-98.5, 74.75], [-98.75, 74.85], [-99.0, 74.75], [-99.25, 74.85], [-99.5, 74.75], [-99.75, 74.85], [-100.0, 74.75], [-100.53, 74.97], [-100.68, 75.32], [-100.75, 75.35], [-101.0, 75.25], [-101.25, 75.35], [-101.5, 75.25], [-101.75, 75.35], [-102.0, 75.25], [-102.25, 75.35], [-102.5, 75.25], [-102.75, 75.35], [-103.0, 75.25], [-103.53, 75.47], [-103.75, 76.0], [-103.65, 76.25], [-103.75, 76.5], [-103.65, 76.75], [-103.75, 77.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the 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-6.185664269557833}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.219467084415041}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-8.951195423573665, -9.528846188171372, -8.451382345732611]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-12.204581502024041, -11.916447781763452, -11.065917390884408]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.87630998879418, -4.78026057951545, -4.0018306849354905]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.818029167320901, -6.185664269557833, -5.22538387444132]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5514424227871748, -1.9923126531784712, -1.6848885454425169]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.923706924037994, -2.4592173547214387, -1.9036801626701052]}}