{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:18:38.612267", "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-Oct-02_to_2020-Oct-04_270.0_47.5"}, "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": 2020100000156}, "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": "October 02 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 04 2020"}, "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": 75175.98939939546}, "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", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 47.5}, "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": 270.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "270.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 267.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 271.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-93.75, 47.0], [-93.53, 47.53], [-93.177, 47.677], [-93.03, 48.03], [-92.5, 48.25], [-91.97, 48.03], [-91.75, 47.5], [-91.875, 47.198], [-91.75, 47.146], [-91.5, 47.25], [-91.25, 47.146], [-91.0, 47.25], [-90.75, 47.146], [-90.677, 47.177], [-90.646, 47.25], [-90.75, 47.5], [-90.53, 48.03], [-90.177, 48.177], [-90.146, 48.25], [-90.25, 48.5], [-90.03, 49.03], [-89.5, 49.25], [-88.97, 49.03], [-88.823, 48.677], [-88.47, 48.53], [-88.25, 48.0], [-88.457, 47.5], [-88.25, 47.0], [-88.375, 46.698], [-87.97, 46.53], [-87.75, 46.0], [-87.854, 45.75], [-87.75, 45.5], [-87.854, 45.25], [-87.75, 45.0], [-87.854, 44.75], [-87.75, 44.5], [-87.97, 43.97], [-88.5, 43.75], [-88.75, 43.854], [-89.0, 43.75], [-89.25, 43.854], [-89.5, 43.75], [-89.75, 43.854], [-90.0, 43.75], [-90.25, 43.854], [-90.323, 43.823], [-90.47, 43.47], [-91.0, 43.25], [-91.53, 43.47], [-91.677, 43.823], [-92.03, 43.97], [-92.25, 44.5], [-92.03, 45.03], [-91.5, 45.25], [-91.198, 45.125], [-91.146, 45.25], [-91.177, 45.323], [-91.53, 45.47], [-91.677, 45.823], [-91.75, 45.854], [-92.0, 45.75], [-92.25, 45.854], [-92.5, 45.75], [-93.03, 45.97], [-93.177, 46.323], [-93.53, 46.47], [-93.75, 47.0]], [[-89.125, 46.302], [-89.25, 46.354], [-89.5, 46.25], [-89.25, 46.146], [-89.177, 46.177], [-89.125, 46.302]], [[-89.75, 46.354], [-89.823, 46.323], [-89.854, 46.25], [-89.823, 46.177], [-89.75, 46.146], [-89.5, 46.25], [-89.75, 46.354]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-10-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-93.17677669529661, 46.32322330470336], [-93.53033008588989, 46.46966991411009], [-93.75, 47.0], [-93.53033008588989, 47.53033008588991], [-93.17677669529661, 47.67677669529664], [-93.03033008588989, 48.03033008588991], [-92.5, 48.25], [-91.96966991411011, 48.03033008588991], [-91.75, 47.5], [-91.875, 47.19822330470337], [-91.75, 47.14644660940672], [-91.5, 47.25], [-91.25, 47.14644660940672], [-91.0, 47.25], [-90.75, 47.14644660940672], [-90.67677669529661, 47.17677669529664], [-90.64644660940672, 47.25], [-90.75, 47.5], [-90.53033008588989, 48.03033008588991], [-90.17677669529661, 48.17677669529664], [-90.14644660940672, 48.25], [-90.25, 48.5], [-90.03033008588989, 49.03033008588991], [-89.5, 49.25], [-88.96966991411011, 49.03033008588991], [-88.82322330470339, 48.67677669529664], [-88.46966991411011, 48.53033008588991], [-88.25, 48.0], [-88.45710678118655, 47.5], [-88.25, 47.0], [-88.375, 46.69822330470337], [-87.96966991411011, 46.53033008588991], [-87.75, 46.0], [-87.85355339059328, 45.75], [-87.75, 45.5], [-87.85355339059328, 45.25], [-87.75, 45.0], [-87.85355339059328, 44.75], [-87.75, 44.5], [-87.96966991411011, 43.96966991411009], [-88.5, 43.75], [-88.75, 43.85355339059328], [-89.0, 43.75], [-89.25, 43.85355339059328], [-89.5, 43.75], [-89.75, 43.85355339059328], [-90.0, 43.75], [-90.25, 43.85355339059328], [-90.32322330470339, 43.82322330470336], [-90.46966991411011, 43.46966991411009], [-91.0, 43.25], [-91.53033008588989, 43.46966991411009], [-91.67677669529661, 43.82322330470336], [-92.03033008588989, 43.96966991411009], [-92.25, 44.5], [-92.03033008588989, 45.03033008588991], [-91.5, 45.25], [-91.19822330470333, 45.12499999999999], [-91.14644660940672, 45.25], [-91.17677669529661, 45.32322330470336], [-91.53033008588989, 45.46966991411009], [-91.67677669529661, 45.82322330470336], [-91.75, 45.85355339059328], [-92.0, 45.75], [-92.25, 45.85355339059328], [-92.5, 45.75], [-93.03033008588989, 45.96966991411009], [-93.17677669529661, 46.32322330470336]], [[-89.25, 46.14644660940672], [-89.17677669529661, 46.17677669529664], [-89.125, 46.30177669529663], [-89.25, 46.35355339059328], [-89.5, 46.25], [-89.25, 46.14644660940672]], [[-89.5, 46.25], [-89.75, 46.35355339059328], [-89.82322330470339, 46.32322330470336], [-89.85355339059328, 46.25], [-89.82322330470339, 46.17677669529664], [-89.75, 46.14644660940672], [-89.5, 46.25]]]}, "2020-10-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-93.17677669529661, 46.32322330470336], [-93.53033008588989, 46.46966991411009], [-93.75, 47.0], [-93.53033008588989, 47.53033008588991], [-93.17677669529661, 47.67677669529664], [-93.03033008588989, 48.03033008588991], [-92.5, 48.25], [-91.96966991411011, 48.03033008588991], [-91.75, 47.5], [-91.875, 47.19822330470337], [-91.75, 47.14644660940672], [-91.5, 47.25], [-91.25, 47.14644660940672], [-91.0, 47.25], [-90.75, 47.14644660940672], [-90.67677669529661, 47.17677669529664], [-90.64644660940672, 47.25], [-90.75, 47.5], [-90.53033008588989, 48.03033008588991], [-90.17677669529661, 48.17677669529664], [-90.14644660940672, 48.25], [-90.25, 48.5], [-90.03033008588989, 49.03033008588991], [-89.5, 49.25], [-88.96966991411011, 49.03033008588991], [-88.82322330470339, 48.67677669529664], [-88.46966991411011, 48.53033008588991], [-88.25, 48.0], [-88.45710678118655, 47.5], [-88.25, 47.0], [-88.375, 46.69822330470337], [-87.96966991411011, 46.53033008588991], [-87.75, 46.0], [-87.85355339059328, 45.75], [-87.75, 45.5], [-87.85355339059328, 45.25], [-87.75, 45.0], [-87.85355339059328, 44.75], [-87.75, 44.5], [-87.96966991411011, 43.96966991411009], [-88.5, 43.75], [-88.75, 43.85355339059328], [-89.0, 43.75], [-89.25, 43.85355339059328], [-89.5, 43.75], [-89.75, 43.85355339059328], [-90.0, 43.75], [-90.25, 43.85355339059328], [-90.32322330470339, 43.82322330470336], [-90.46966991411011, 43.46966991411009], [-91.0, 43.25], [-91.53033008588989, 43.46966991411009], [-91.67677669529661, 43.82322330470336], [-92.03033008588989, 43.96966991411009], [-92.25, 44.5], [-92.03033008588989, 45.03033008588991], [-91.5, 45.25], [-91.19822330470333, 45.12499999999999], [-91.14644660940672, 45.25], [-91.17677669529661, 45.32322330470336], [-91.53033008588989, 45.46966991411009], [-91.67677669529661, 45.82322330470336], [-91.75, 45.85355339059328], [-92.0, 45.75], [-92.25, 45.85355339059328], [-92.5, 45.75], [-93.03033008588989, 45.96966991411009], [-93.17677669529661, 46.32322330470336]], [[-89.25, 46.14644660940672], [-89.17677669529661, 46.17677669529664], [-89.125, 46.30177669529663], [-89.25, 46.35355339059328], [-89.5, 46.25], [-89.25, 46.14644660940672]], [[-89.5, 46.25], [-89.75, 46.35355339059328], [-89.82322330470339, 46.32322330470336], [-89.85355339059328, 46.25], [-89.82322330470339, 46.17677669529664], [-89.75, 46.14644660940672], [-89.5, 46.25]]]}, "2020-10-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-93.17677669529661, 46.32322330470336], [-93.53033008588989, 46.46966991411009], [-93.75, 47.0], [-93.53033008588989, 47.53033008588991], [-93.17677669529661, 47.67677669529664], [-93.03033008588989, 48.03033008588991], [-92.5, 48.25], [-91.96966991411011, 48.03033008588991], [-91.75, 47.5], [-91.875, 47.19822330470337], [-91.75, 47.14644660940672], [-91.5, 47.25], [-91.25, 47.14644660940672], [-91.0, 47.25], [-90.75, 47.14644660940672], [-90.67677669529661, 47.17677669529664], [-90.64644660940672, 47.25], [-90.75, 47.5], [-90.53033008588989, 48.03033008588991], [-90.17677669529661, 48.17677669529664], [-90.14644660940672, 48.25], [-90.25, 48.5], [-90.03033008588989, 49.03033008588991], [-89.5, 49.25], [-88.96966991411011, 49.03033008588991], [-88.82322330470339, 48.67677669529664], [-88.46966991411011, 48.53033008588991], [-88.25, 48.0], [-88.45710678118655, 47.5], [-88.25, 47.0], [-88.375, 46.69822330470337], [-87.96966991411011, 46.53033008588991], [-87.75, 46.0], [-87.85355339059328, 45.75], [-87.75, 45.5], [-87.85355339059328, 45.25], [-87.75, 45.0], [-87.85355339059328, 44.75], [-87.75, 44.5], [-87.96966991411011, 43.96966991411009], [-88.5, 43.75], [-88.75, 43.85355339059328], [-89.0, 43.75], [-89.25, 43.85355339059328], [-89.5, 43.75], [-89.75, 43.85355339059328], [-90.0, 43.75], [-90.25, 43.85355339059328], [-90.32322330470339, 43.82322330470336], [-90.46966991411011, 43.46966991411009], [-91.0, 43.25], [-91.53033008588989, 43.46966991411009], [-91.67677669529661, 43.82322330470336], [-92.03033008588989, 43.96966991411009], [-92.25, 44.5], [-92.03033008588989, 45.03033008588991], [-91.5, 45.25], [-91.19822330470333, 45.12499999999999], [-91.14644660940672, 45.25], [-91.17677669529661, 45.32322330470336], [-91.53033008588989, 45.46966991411009], [-91.67677669529661, 45.82322330470336], [-91.75, 45.85355339059328], [-92.0, 45.75], [-92.25, 45.85355339059328], [-92.5, 45.75], [-93.03033008588989, 45.96966991411009], [-93.17677669529661, 46.32322330470336]], [[-89.25, 46.14644660940672], [-89.17677669529661, 46.17677669529664], [-89.125, 46.30177669529663], [-89.25, 46.35355339059328], [-89.5, 46.25], [-89.25, 46.14644660940672]], [[-89.5, 46.25], [-89.75, 46.35355339059328], [-89.82322330470339, 46.32322330470336], [-89.85355339059328, 46.25], [-89.82322330470339, 46.17677669529664], [-89.75, 46.14644660940672], [-89.5, 46.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.10823869786401}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.137369052866524}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.4832610880049515, 4.423315483629381, 4.518973625721344]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.14432246220548, 1.5042241096773523, 1.4089117719851743]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.212980765348395, -6.168011133013112, -6.031115260238062]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.0455768679188395, -7.10823869786401, -6.921812642289353]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5188436195040693, -1.4504212441508835, -1.3679206235627683]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8503077777335744, -1.774614608388575, -1.481181593645822]}}