{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:22:52.245862", "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-Mar-14_to_2021-Mar-16_294.0_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": 2021030000649}, "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": "March 14 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 16 2021"}, "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": 57152.37884819129}, "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": 294.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "294.0\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": 296.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-68.146, 52.25], [-68.25, 52.5], [-68.03, 53.03], [-67.5, 53.25], [-67.25, 53.146], [-67.177, 53.177], [-67.03, 53.53], [-66.5, 53.75], [-66.25, 53.646], [-66.0, 53.75], [-65.75, 53.646], [-65.5, 53.75], [-64.97, 53.53], [-64.823, 53.177], [-64.75, 53.146], [-64.5, 53.25], [-63.97, 53.03], [-63.823, 52.677], [-63.47, 52.53], [-63.25, 52.0], [-63.354, 51.75], [-63.25, 51.5], [-63.47, 50.97], [-64.0, 50.75], [-64.25, 50.854], [-64.5, 50.75], [-64.75, 50.854], [-64.823, 50.823], [-64.97, 50.47], [-65.5, 50.25], [-65.75, 50.354], [-66.0, 50.25], [-66.25, 50.354], [-66.5, 50.25], [-66.75, 50.354], [-67.0, 50.25], [-67.53, 50.47], [-67.677, 50.823], [-68.03, 50.97], [-68.25, 51.5], [-68.146, 51.75], [-68.25, 52.0], [-68.146, 52.25]]]}}, "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 boundary of the event at each time step", "value": {"2021-03-14T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-68.14644660940672, 51.75], [-68.25, 52.0], [-68.14644660940672, 52.25], [-68.25, 52.5], [-68.03033008588989, 53.03033008588991], [-67.5, 53.25], [-67.25, 53.14644660940672], [-67.17677669529661, 53.17677669529664], [-67.03033008588989, 53.53033008588991], [-66.5, 53.75], [-66.25, 53.64644660940672], [-66.0, 53.75], [-65.75, 53.64644660940672], [-65.5, 53.75], [-64.96966991411011, 53.53033008588991], [-64.82322330470339, 53.17677669529664], [-64.75, 53.14644660940672], [-64.5, 53.25], [-63.96966991411011, 53.03033008588991], [-63.82322330470339, 52.67677669529664], [-63.46966991411011, 52.53033008588991], [-63.25, 52.0], [-63.35355339059328, 51.75], [-63.25, 51.5], [-63.46966991411011, 50.96966991411009], [-64.0, 50.75], [-64.25, 50.85355339059328], [-64.5, 50.75], [-64.75, 50.85355339059328], [-64.82322330470339, 50.82322330470336], [-64.96966991411011, 50.46966991411009], [-65.5, 50.25], [-65.75, 50.35355339059328], [-66.0, 50.25], [-66.25, 50.35355339059328], [-66.5, 50.25], [-66.75, 50.35355339059328], [-67.0, 50.25], [-67.53033008588989, 50.46966991411009], [-67.67677669529661, 50.82322330470336], [-68.03033008588989, 50.96966991411009], [-68.25, 51.5], [-68.14644660940672, 51.75]]]}, "2021-03-15T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-68.14644660940672, 51.75], [-68.25, 52.0], [-68.14644660940672, 52.25], [-68.25, 52.5], [-68.03033008588989, 53.03033008588991], [-67.5, 53.25], [-67.25, 53.14644660940672], [-67.17677669529661, 53.17677669529664], [-67.03033008588989, 53.53033008588991], [-66.5, 53.75], [-66.25, 53.64644660940672], [-66.0, 53.75], [-65.75, 53.64644660940672], [-65.5, 53.75], [-64.96966991411011, 53.53033008588991], [-64.82322330470339, 53.17677669529664], [-64.75, 53.14644660940672], [-64.5, 53.25], [-63.96966991411011, 53.03033008588991], [-63.82322330470339, 52.67677669529664], [-63.46966991411011, 52.53033008588991], [-63.25, 52.0], [-63.35355339059328, 51.75], [-63.25, 51.5], [-63.46966991411011, 50.96966991411009], [-64.0, 50.75], [-64.25, 50.85355339059328], [-64.5, 50.75], [-64.75, 50.85355339059328], [-64.82322330470339, 50.82322330470336], [-64.96966991411011, 50.46966991411009], [-65.5, 50.25], [-65.75, 50.35355339059328], [-66.0, 50.25], [-66.25, 50.35355339059328], [-66.5, 50.25], [-66.75, 50.35355339059328], [-67.0, 50.25], [-67.53033008588989, 50.46966991411009], [-67.67677669529661, 50.82322330470336], [-68.03033008588989, 50.96966991411009], [-68.25, 51.5], [-68.14644660940672, 51.75]]]}, "2021-03-16T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-68.14644660940672, 51.75], [-68.25, 52.0], [-68.14644660940672, 52.25], [-68.25, 52.5], [-68.03033008588989, 53.03033008588991], [-67.5, 53.25], [-67.25, 53.14644660940672], [-67.17677669529661, 53.17677669529664], [-67.03033008588989, 53.53033008588991], [-66.5, 53.75], [-66.25, 53.64644660940672], [-66.0, 53.75], [-65.75, 53.64644660940672], [-65.5, 53.75], [-64.96966991411011, 53.53033008588991], [-64.82322330470339, 53.17677669529664], [-64.75, 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duration", "value": -11.342350628155966}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-21.762411329503294, -24.352428659466057, -23.971156589224847]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-23.63155262158591, -26.513618217292333, -26.49482648653884]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.667308528299715, -12.385543452353678, -11.974199903814506]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.403761609240775, -12.97911152776041, -12.520112863825773]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3898586124633063, -1.7885616386595584, -1.7324150175864788]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.49510687407279, -1.9159490142144602, -1.8981552548169338]}}