{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:13:59.997737", "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-Jun-14_to_2020-Jun-17_257.5_64.5"}, "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": 2020060000490}, "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 14 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 17 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 58041.53722374159}, "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": 64.5}, "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": 257.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "257.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 256.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 260.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 65.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-104.75, 63.5], [-104.646, 63.75], [-104.75, 64.0], [-104.53, 64.53], [-104.177, 64.677], [-104.146, 64.75], [-104.146, 64.751], [-104.25, 65.0], [-104.03, 65.53], [-103.677, 65.677], [-103.53, 66.03], [-103.0, 66.25], [-102.75, 66.146], [-102.5, 66.25], [-102.25, 66.146], [-102.0, 66.25], [-101.75, 66.146], [-101.5, 66.25], [-100.97, 66.03], [-100.823, 65.677], [-100.75, 65.646], [-100.5, 65.75], [-100.25, 65.646], [-100.0, 65.75], [-99.47, 65.53], [-99.25, 65.0], [-99.354, 64.75], [-99.25, 64.5], [-99.47, 63.97], [-99.823, 63.823], [-99.97, 63.47], [-100.323, 63.323], [-100.47, 62.97], [-101.0, 62.75], [-101.25, 62.854], [-101.5, 62.75], [-101.749, 62.854], [-101.75, 62.854], [-101.823, 62.823], [-101.854, 62.75], [-101.75, 62.5], [-101.97, 61.97], [-102.5, 61.75], [-102.75, 61.854], [-103.0, 61.75], [-103.25, 61.854], [-103.5, 61.75], [-103.75, 61.854], [-104.0, 61.75], [-104.53, 61.97], [-104.75, 62.5], [-104.646, 62.75], [-104.75, 63.0], [-104.646, 63.25], [-104.75, 63.5]]]}}, "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": {"2020-06-14T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-104.64644660940672, 62.75], [-104.75, 63.0], [-104.64644660940672, 63.25], [-104.75, 63.5], [-104.64644660940672, 63.75], [-104.75, 64.0], [-104.53033008588991, 64.53033008588991], [-104.17677669529664, 64.67677669529664], [-104.03033008588991, 65.03033008588991], [-103.5, 65.25], [-103.25, 65.14644660940672], [-103.0, 65.25], [-102.75, 65.14644660940672], [-102.5, 65.25], [-102.25, 65.14644660940672], [-102.0, 65.25], [-101.46966991411011, 65.03033008588991], [-101.25, 64.5], [-101.35355339059328, 64.25], [-101.25, 64.0], [-101.35355339059328, 63.75], [-101.25, 63.5], [-101.46966991411011, 62.96966991411009], [-101.82322330470339, 62.82322330470336], [-101.85355339059328, 62.75], [-101.75, 62.5], [-101.96966991411011, 61.96966991411009], [-102.5, 61.75], [-102.75, 61.85355339059328], [-103.0, 61.75], [-103.25, 61.85355339059328], [-103.5, 61.75], [-103.75, 61.85355339059328], [-104.0, 61.75], [-104.53033008588991, 61.96966991411009], [-104.75, 62.5], [-104.64644660940672, 62.75]]]}, "2020-06-15T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-104.64644660940672, 62.75], [-104.75, 63.0], [-104.64644660940672, 63.25], [-104.75, 63.5], [-104.64644660940672, 63.75], [-104.75, 64.0], [-104.53033008588991, 64.53033008588991], [-104.17677669529664, 64.67677669529664], [-104.14644660940672, 64.75], [-104.25, 65.0], [-104.03033008588991, 65.53033008588991], [-103.67677669529661, 65.67677669529664], [-103.53033008588989, 66.03033008588991], [-103.0, 66.25], [-102.75, 66.14644660940672], [-102.5, 66.25], [-102.25, 66.14644660940672], [-102.0, 66.25], [-101.75, 66.14644660940672], [-101.5, 66.25], [-100.96966991411011, 66.03033008588991], [-100.82322330470339, 65.67677669529664], [-100.75, 65.64644660940672], [-100.5, 65.75], [-100.25, 65.64644660940672], [-100.0, 65.75], [-99.46966991411011, 65.53033008588991], [-99.25, 65.0], [-99.35355339059328, 64.75], [-99.25, 64.5], [-99.46966991411011, 63.96966991411009], [-99.82322330470339, 63.82322330470336], [-99.96966991411011, 63.46966991411009], [-100.32322330470339, 63.32322330470336], [-100.46966991411011, 62.96966991411009], [-101.0, 62.75], [-101.25, 62.85355339059328], [-101.5, 62.75], [-101.75, 62.85355339059328], [-101.82322330470339, 62.82322330470336], [-101.85355339059328, 62.75], [-101.75, 62.5], [-101.96966991411011, 61.96966991411009], [-102.5, 61.75], [-102.75, 61.85355339059328], [-103.0, 61.75], [-103.25, 61.85355339059328], [-103.5, 61.75], [-103.75, 61.85355339059328], [-104.0, 61.75], [-104.53033008588991, 61.96966991411009], [-104.75, 62.5], [-104.64644660940672, 62.75]]]}, "2020-06-16T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-104.64644660940672, 62.75], [-104.75, 63.0], [-104.64644660940672, 63.25], [-104.75, 63.5], [-104.64644660940672, 63.75], [-104.75, 64.0], [-104.53033008588991, 64.53033008588991], [-104.17677669529664, 64.67677669529664], [-104.14644660940672, 64.75], [-104.25, 65.0], [-104.03033008588991, 65.53033008588991], [-103.67677669529661, 65.67677669529664], [-103.53033008588989, 66.03033008588991], [-103.0, 66.25], [-102.75, 66.14644660940672], [-102.5, 66.25], [-102.25, 66.14644660940672], [-102.0, 66.25], [-101.75, 66.14644660940672], [-101.5, 66.25], [-100.96966991411011, 66.03033008588991], [-100.82322330470339, 65.67677669529664], [-100.75, 65.64644660940672], [-100.5, 65.75], [-100.25, 65.64644660940672], [-100.0, 65.75], [-99.46966991411011, 65.53033008588991], [-99.25, 65.0], [-99.35355339059328, 64.75], [-99.25, 64.5], [-99.46966991411011, 63.96966991411009], [-99.82322330470339, 63.82322330470336], [-99.96966991411011, 63.46966991411009], [-100.32322330470339, 63.32322330470336], [-100.46966991411011, 62.96966991411009], [-101.0, 62.75], [-101.25, 62.85355339059328], [-101.5, 62.75], [-101.75, 62.85355339059328], [-101.82322330470339, 62.82322330470336], [-101.85355339059328, 62.75], [-101.75, 62.5], [-101.96966991411011, 61.96966991411009], [-102.5, 61.75], [-102.75, 61.85355339059328], [-103.0, 61.75], [-103.25, 61.85355339059328], [-103.5, 61.75], [-103.75, 61.85355339059328], [-104.0, 61.75], [-104.53033008588991, 61.96966991411009], [-104.75, 62.5], [-104.64644660940672, 62.75]]]}, "2020-06-17T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-104.14644660940672, 64.75], [-104.25, 65.0], [-104.03033008588991, 65.53033008588991], [-103.67677669529661, 65.67677669529664], [-103.53033008588989, 66.03033008588991], [-103.0, 66.25], [-102.75, 66.14644660940672], [-102.5, 66.25], [-102.25, 66.14644660940672], [-102.0, 66.25], [-101.75, 66.14644660940672], [-101.5, 66.25], [-100.96966991411011, 66.03033008588991], [-100.82322330470339, 65.67677669529664], [-100.75, 65.64644660940672], [-100.5, 65.75], [-100.25, 65.64644660940672], [-100.0, 65.75], [-99.46966991411011, 65.53033008588991], [-99.25, 65.0], [-99.35355339059328, 64.75], [-99.25, 64.5], [-99.46966991411011, 63.96966991411009], [-99.82322330470339, 63.82322330470336], [-99.96966991411011, 63.46966991411009], [-100.32322330470339, 63.32322330470336], [-100.46966991411011, 62.96966991411009], [-101.0, 62.75], [-101.25, 62.85355339059328], [-101.5, 62.75], [-101.75, 62.85355339059328], [-101.82322330470339, 62.82322330470336], [-101.85355339059328, 62.75], [-101.75, 62.5], [-101.96966991411011, 61.96966991411009], [-102.5, 61.75], [-102.75, 61.85355339059328], [-103.0, 61.75], [-103.25, 61.85355339059328], [-103.5, 61.75], [-104.03033008588991, 61.96966991411009], [-104.25, 62.5], [-104.03033008588991, 63.03033008588991], [-103.625, 63.19822330470337], [-103.75, 63.5], [-103.64644660940672, 63.75], [-103.67677669529661, 63.82322330470336], [-104.03033008588991, 63.96966991411009], [-104.25, 64.5], [-104.14644660940672, 64.75]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.358855553380579}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.44804511904378}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.9239695984555283, 1.9444050574580274, 1.3095432028028995, 2.8199668119643775]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.1266827920103424, 1.1629222675974233, 0.012863720513507815, 1.0726867805008737]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.68016477498897, -6.184234353530742, -7.179139787264408, -5.728049683408912]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.649413431224218, -7.288674076625227, -8.358855553380579, -6.758320502666038]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5442124699223105, -1.4622797751024779, -1.7097083612287067, -1.38707293629448]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7799613462677342, -1.678843793794694, -1.9518032051477125, -1.5586300622747509]}}