{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:27.161020", "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-Jul-30_to_2023-Aug-03_296.0_51.0"}, "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": 2023070000883}, "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 30 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 03 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": 61124.93596431913}, "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": 51.0}, "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": 296.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "296.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 292.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 297.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-65.25, 50.35], [-65.5, 50.25], [-66.03, 50.47], [-66.18, 50.82], [-66.25, 50.85], [-66.5, 50.75], [-66.75, 50.85], 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"description": "List of all IPCC regions affected", "value": ["N.E.North-America", "E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-07-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.52999999999997, 52.03], [-64.0, 52.25], [-63.75, 52.15], [-63.5, 52.25], [-63.25, 52.15], [-63.0, 52.25], [-62.75, 52.15], [-62.5, 52.25], [-61.97000000000003, 52.03], [-61.75, 51.5], [-61.85000000000002, 51.25], [-61.75, 51.0], [-61.97000000000003, 50.47], [-62.5, 50.25], [-62.75, 50.35], [-62.81999999999999, 50.32], [-62.97000000000003, 49.97], [-63.5, 49.75], [-64.02999999999997, 49.97], [-64.18, 50.32], [-64.52999999999997, 50.47], [-64.75, 51.0], [-64.64999999999998, 51.25], [-64.75, 51.5], [-64.52999999999997, 52.03]]], [[[-67.64999999999998, 53.75], [-67.75, 54.0], [-67.52999999999997, 54.53], [-67.0, 54.75], [-66.47000000000003, 54.53], [-66.32, 54.18], 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"description": "The daily evolution of mean t2m.", "value": [11.904690049412011, 11.413064711889547, 11.092715631011686, 11.639330552005163, 12.029565466282463]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.241839076548843, 9.75948745046827, 9.414557826399175, 10.699758809326909, 12.029565466282463]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.567380221958077, -3.8101852471677837, -4.085817007949659, -3.3087806785211065, -2.8795388273929348]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.225851165024437, -4.295387983624835, -5.031255677134652, -3.7772262155064027, -2.8795388273929348]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3991313814500204, -1.5699788714109528, -1.7260601738932395, -1.4060060107652745, -1.323922161243989]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5431440667397316, -1.904721134013262, -2.1403542521508636, -1.6597327369792463, -1.323922161243989]}}