{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:13:56.991024", "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-09_to_2020-Jun-12_269.0_51.5"}, "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": 2020060000342}, "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 09 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 12 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": 237123.63765082546}, "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": 51.5}, "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": 269.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "269.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 263.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 274.5}, "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": 54.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-97.53, 54.53], [-97.0, 54.75], [-96.75, 54.646], [-96.5, 54.75], [-96.0, 54.543], [-95.5, 54.75], [-95.25, 54.646], [-95.0, 54.75], [-94.75, 54.646], [-94.5, 54.75], [-94.25, 54.646], [-94.0, 54.75], [-93.75, 54.646], [-93.5, 54.75], [-92.97, 54.53], [-92.823, 54.177], [-92.75, 54.146], [-92.726, 54.156], [-92.677, 54.177], [-92.646, 54.25], [-92.75, 54.5], [-92.53, 55.03], [-92.0, 55.25], [-91.75, 55.146], [-91.5, 55.25], [-90.97, 55.03], [-90.823, 54.677], [-90.75, 54.646], [-90.5, 54.75], [-90.25, 54.646], [-90.0, 54.75], [-89.47, 54.53], [-89.323, 54.177], [-89.25, 54.146], [-89.0, 54.25], [-88.75, 54.146], [-88.5, 54.25], [-88.25, 54.146], [-88.0, 54.25], [-87.47, 54.03], [-87.323, 53.677], [-87.25, 53.646], [-87.0, 53.75], [-86.75, 53.646], [-86.5, 53.75], [-86.25, 53.646], [-86.177, 53.677], [-86.03, 54.03], [-85.5, 54.25], [-84.97, 54.03], [-84.75, 53.5], [-84.854, 53.25], [-84.75, 53.0], [-84.97, 52.47], [-85.5, 52.25], [-85.75, 52.354], [-85.823, 52.323], [-85.97, 51.97], [-86.5, 51.75], [-86.75, 51.854], [-87.0, 51.75], [-87.25, 51.854], [-87.5, 51.75], [-87.75, 51.854], [-87.823, 51.823], [-87.97, 51.47], [-88.5, 51.25], [-88.75, 51.354], [-89.0, 51.25], [-89.25, 51.354], [-89.323, 51.323], [-89.47, 50.97], [-90.0, 50.75], [-90.25, 50.854], [-90.323, 50.823], [-90.47, 50.47], [-91.0, 50.25], [-91.25, 50.354], [-91.323, 50.323], [-91.47, 49.97], [-92.0, 49.75], [-92.25, 49.854], [-92.5, 49.75], [-92.75, 49.854], [-93.0, 49.75], [-93.25, 49.854], [-93.5, 49.75], [-93.75, 49.854], [-94.0, 49.75], [-94.25, 49.854], [-94.5, 49.75], [-94.75, 49.854], [-95.0, 49.75], [-95.25, 49.854], [-95.5, 49.75], [-96.03, 49.97], [-96.177, 50.323], [-96.53, 50.47], [-96.75, 51.0], [-96.646, 51.25], [-96.677, 51.323], [-97.03, 51.47], [-97.25, 52.0], [-97.146, 52.25], [-97.25, 52.5], [-97.146, 52.75], [-97.25, 53.0], [-97.146, 53.25], [-97.177, 53.323], [-97.53, 53.47], [-97.75, 54.0], [-97.53, 54.53]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-06-09T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-93.64644660940672, 52.25], [-93.75, 52.5], [-93.64644660940672, 52.75], [-93.75, 53.0], [-93.53033008588989, 53.53033008588991], [-93.17677669529661, 53.67677669529664], [-93.03033008588989, 54.03033008588991], [-92.5, 54.25], [-92.25, 54.14644660940672], [-92.0, 54.25], [-91.46966991411011, 54.03033008588991], [-91.32322330470339, 53.67677669529664], [-91.25, 53.64644660940672], [-91.0, 53.75], [-90.75, 53.64644660940672], [-90.5, 53.75], [-90.25, 53.64644660940672], [-90.0, 53.75], [-89.75, 53.64644660940672], [-89.5, 53.75], [-89.25, 53.64644660940672], [-89.0, 53.75], [-88.75, 53.64644660940672], [-88.5, 53.75], [-88.25, 53.64644660940672], [-88.0, 53.75], [-87.75, 53.64644660940672], [-87.5, 53.75], [-87.25, 53.64644660940672], [-87.0, 53.75], [-86.75, 53.64644660940672], [-86.5, 53.75], [-86.25, 53.64644660940672], [-86.0, 53.75], [-85.75, 53.64644660940672], [-85.5, 53.75], [-84.96966991411011, 53.53033008588991], [-84.75, 53.0], [-84.96966991411011, 52.46966991411009], [-85.5, 52.25], [-85.75, 52.35355339059328], [-85.82322330470339, 52.32322330470336], [-85.96966991411011, 51.96966991411009], [-86.5, 51.75], [-86.75, 51.85355339059328], [-87.0, 51.75], [-87.25, 51.85355339059328], [-87.5, 51.75], [-87.75, 51.85355339059328], [-87.82322330470339, 51.82322330470336], [-87.96966991411011, 51.46966991411009], [-88.5, 51.25], [-88.75, 51.35355339059328], [-89.0, 51.25], [-89.25, 51.35355339059328], [-89.32322330470339, 51.32322330470336], [-89.46966991411011, 50.96966991411009], [-90.0, 50.75], [-90.25, 50.85355339059328], [-90.5, 50.75], [-90.75, 50.85355339059328], [-91.0, 50.75], [-91.25, 50.85355339059328], [-91.5, 50.75], [-92.03033008588989, 50.96966991411009], [-92.17677669529661, 51.32322330470336], [-92.25, 51.35355339059328], [-92.5, 51.25], [-92.75, 51.35355339059328], [-93.0, 51.25], [-93.53033008588989, 51.46966991411009], [-93.75, 52.0], [-93.64644660940672, 52.25]]]}, "2020-06-10T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-97.17677669529661, 53.32322330470336], [-97.53033008588989, 53.46966991411009], [-97.75, 54.0], [-97.53033008588989, 54.53033008588991], [-97.0, 54.75], [-96.75, 54.64644660940672], [-96.5, 54.75], [-96.0, 54.54289321881344], [-95.5, 54.75], [-95.25, 54.64644660940672], [-95.0, 54.75], [-94.75, 54.64644660940672], [-94.5, 54.75], [-94.25, 54.64644660940672], [-94.0, 54.75], [-93.75, 54.64644660940672], [-93.5, 54.75], [-92.96966991411011, 54.53033008588991], [-92.82322330470339, 54.17677669529664], [-92.75, 54.14644660940672], [-92.67677669529661, 54.17677669529664], [-92.64644660940672, 54.25], [-92.75, 54.5], [-92.53033008588989, 55.03033008588991], [-92.0, 55.25], [-91.75, 55.14644660940672], [-91.5, 55.25], [-90.96966991411011, 55.03033008588991], [-90.82322330470339, 54.67677669529664], [-90.75, 54.64644660940672], [-90.5, 54.75], [-90.25, 54.64644660940672], [-90.0, 54.75], [-89.46966991411011, 54.53033008588991], [-89.32322330470339, 54.17677669529664], [-89.25, 54.14644660940672], [-89.0, 54.25], [-88.75, 54.14644660940672], [-88.5, 54.25], [-88.25, 54.14644660940672], [-88.0, 54.25], [-87.46966991411011, 54.03033008588991], [-87.32322330470339, 53.67677669529664], [-87.25, 53.64644660940672], [-87.0, 53.75], [-86.75, 53.64644660940672], [-86.5, 53.75], [-86.25, 53.64644660940672], [-86.17677669529661, 53.67677669529664], [-86.03033008588989, 54.03033008588991], [-85.5, 54.25], [-84.96966991411011, 54.03033008588991], [-84.75, 53.5], [-84.85355339059328, 53.25], [-84.75, 53.0], [-84.96966991411011, 52.46966991411009], [-85.5, 52.25], [-85.75, 52.35355339059328], [-85.82322330470339, 52.32322330470336], [-85.96966991411011, 51.96966991411009], [-86.5, 51.75], [-86.75, 51.85355339059328], [-87.0, 51.75], [-87.25, 51.85355339059328], [-87.5, 51.75], [-87.75, 51.85355339059328], [-87.82322330470339, 51.82322330470336], [-87.96966991411011, 51.46966991411009], [-88.5, 51.25], [-88.75, 51.35355339059328], [-89.0, 51.25], [-89.25, 51.35355339059328], [-89.32322330470339, 51.32322330470336], [-89.46966991411011, 50.96966991411009], [-90.0, 50.75], [-90.25, 50.85355339059328], [-90.32322330470339, 50.82322330470336], [-90.46966991411011, 50.46966991411009], [-91.0, 50.25], [-91.25, 50.35355339059328], [-91.32322330470339, 50.32322330470336], [-91.46966991411011, 49.96966991411009], [-92.0, 49.75], [-92.25, 49.85355339059328], [-92.5, 49.75], [-92.75, 49.85355339059328], [-93.0, 49.75], [-93.25, 49.85355339059328], [-93.5, 49.75], [-93.75, 49.85355339059328], [-94.0, 49.75], [-94.25, 49.85355339059328], [-94.5, 49.75], [-94.75, 49.85355339059328], [-95.0, 49.75], [-95.25, 49.85355339059328], [-95.5, 49.75], [-96.03033008588989, 49.96966991411009], [-96.17677669529661, 50.32322330470336], [-96.53033008588989, 50.46966991411009], [-96.75, 51.0], [-96.64644660940672, 51.25], [-96.67677669529661, 51.32322330470336], [-97.03033008588989, 51.46966991411009], [-97.25, 52.0], [-97.14644660940672, 52.25], [-97.25, 52.5], [-97.14644660940672, 52.75], [-97.25, 53.0], [-97.14644660940672, 53.25], [-97.17677669529661, 53.32322330470336]]]}, "2020-06-11T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-97.17677669529661, 53.32322330470336], [-97.53033008588989, 53.46966991411009], [-97.75, 54.0], [-97.53033008588989, 54.53033008588991], [-97.0, 54.75], [-96.75, 54.64644660940672], [-96.5, 54.75], [-96.0, 54.54289321881344], [-95.5, 54.75], [-95.25, 54.64644660940672], [-95.0, 54.75], [-94.75, 54.64644660940672], [-94.5, 54.75], [-94.25, 54.64644660940672], [-94.0, 54.75], [-93.75, 54.64644660940672], [-93.5, 54.75], [-92.96966991411011, 54.53033008588991], [-92.82322330470339, 54.17677669529664], [-92.75, 54.14644660940672], [-92.67677669529661, 54.17677669529664], [-92.64644660940672, 54.25], [-92.75, 54.5], [-92.53033008588989, 55.03033008588991], [-92.0, 55.25], [-91.75, 55.14644660940672], [-91.5, 55.25], [-90.96966991411011, 55.03033008588991], [-90.82322330470339, 54.67677669529664], [-90.75, 54.64644660940672], [-90.5, 54.75], [-90.25, 54.64644660940672], [-90.0, 54.75], [-89.46966991411011, 54.53033008588991], [-89.32322330470339, 54.17677669529664], [-89.25, 54.14644660940672], [-89.0, 54.25], [-88.75, 54.14644660940672], [-88.5, 54.25], [-88.25, 54.14644660940672], [-88.0, 54.25], [-87.46966991411011, 54.03033008588991], [-87.32322330470339, 53.67677669529664], [-87.25, 53.64644660940672], [-87.0, 53.75], [-86.75, 53.64644660940672], [-86.5, 53.75], [-86.25, 53.64644660940672], [-86.17677669529661, 53.67677669529664], [-86.03033008588989, 54.03033008588991], [-85.5, 54.25], [-84.96966991411011, 54.03033008588991], [-84.75, 53.5], [-84.85355339059328, 53.25], [-84.75, 53.0], [-84.96966991411011, 52.46966991411009], [-85.5, 52.25], [-85.75, 52.35355339059328], [-85.82322330470339, 52.32322330470336], [-85.96966991411011, 51.96966991411009], [-86.5, 51.75], [-86.75, 51.85355339059328], [-87.0, 51.75], [-87.25, 51.85355339059328], [-87.5, 51.75], [-87.75, 51.85355339059328], [-87.82322330470339, 51.82322330470336], [-87.96966991411011, 51.46966991411009], [-88.5, 51.25], [-88.75, 51.35355339059328], [-89.0, 51.25], [-89.25, 51.35355339059328], [-89.32322330470339, 51.32322330470336], [-89.46966991411011, 50.96966991411009], [-90.0, 50.75], [-90.25, 50.85355339059328], [-90.32322330470339, 50.82322330470336], [-90.46966991411011, 50.46966991411009], [-91.0, 50.25], [-91.25, 50.35355339059328], [-91.32322330470339, 50.32322330470336], [-91.46966991411011, 49.96966991411009], [-92.0, 49.75], [-92.25, 49.85355339059328], [-92.5, 49.75], [-92.75, 49.85355339059328], [-93.0, 49.75], [-93.25, 49.85355339059328], [-93.5, 49.75], [-93.75, 49.85355339059328], [-94.0, 49.75], [-94.25, 49.85355339059328], [-94.5, 49.75], [-94.75, 49.85355339059328], [-95.0, 49.75], [-95.25, 49.85355339059328], [-95.5, 49.75], [-96.03033008588989, 49.96966991411009], [-96.17677669529661, 50.32322330470336], [-96.53033008588989, 50.46966991411009], [-96.75, 51.0], [-96.64644660940672, 51.25], [-96.67677669529661, 51.32322330470336], [-97.03033008588989, 51.46966991411009], [-97.25, 52.0], [-97.14644660940672, 52.25], [-97.25, 52.5], [-97.14644660940672, 52.75], [-97.25, 53.0], [-97.14644660940672, 53.25], [-97.17677669529661, 53.32322330470336]]]}, "2020-06-12T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-97.17677669529661, 53.32322330470336], [-97.53033008588989, 53.46966991411009], [-97.75, 54.0], [-97.53033008588989, 54.53033008588991], [-97.0, 54.75], [-96.75, 54.64644660940672], [-96.5, 54.75], [-96.0, 54.54289321881344], [-95.5, 54.75], [-95.25, 54.64644660940672], [-95.0, 54.75], [-94.75, 54.64644660940672], [-94.5, 54.75], [-94.25, 54.64644660940672], [-94.0, 54.75], [-93.75, 54.64644660940672], [-93.5, 54.75], [-92.96966991411011, 54.53033008588991], [-92.82322330470339, 54.17677669529664], [-92.75, 54.14644660940672], [-92.67677669529661, 54.17677669529664], [-92.64644660940672, 54.25], [-92.75, 54.5], [-92.53033008588989, 55.03033008588991], [-92.0, 55.25], [-91.75, 55.14644660940672], [-91.5, 55.25], [-90.96966991411011, 55.03033008588991], [-90.82322330470339, 54.67677669529664], [-90.75, 54.64644660940672], [-90.5, 54.75], [-90.25, 54.64644660940672], [-90.0, 54.75], [-89.46966991411011, 54.53033008588991], [-89.32322330470339, 54.17677669529664], [-89.25, 54.14644660940672], [-89.0, 54.25], [-88.75, 54.14644660940672], [-88.5, 54.25], [-88.25, 54.14644660940672], [-88.0, 54.25], [-87.46966991411011, 54.03033008588991], [-87.32322330470339, 53.67677669529664], [-87.25, 53.64644660940672], [-87.0, 53.75], [-86.75, 53.64644660940672], [-86.5, 53.75], [-86.25, 53.64644660940672], [-86.17677669529661, 53.67677669529664], [-86.03033008588989, 54.03033008588991], [-85.5, 54.25], [-84.96966991411011, 54.03033008588991], [-84.75, 53.5], [-84.85355339059328, 53.25], [-84.75, 53.0], [-84.96966991411011, 52.46966991411009], [-85.5, 52.25], [-85.75, 52.35355339059328], [-85.82322330470339, 52.32322330470336], [-85.96966991411011, 51.96966991411009], [-86.5, 51.75], [-86.75, 51.85355339059328], [-87.0, 51.75], [-87.25, 51.85355339059328], [-87.5, 51.75], [-87.75, 51.85355339059328], [-87.82322330470339, 51.82322330470336], [-87.96966991411011, 51.46966991411009], [-88.5, 51.25], [-88.75, 51.35355339059328], [-89.0, 51.25], [-89.25, 51.35355339059328], [-89.32322330470339, 51.32322330470336], [-89.46966991411011, 50.96966991411009], [-90.0, 50.75], [-90.25, 50.85355339059328], [-90.32322330470339, 50.82322330470336], [-90.46966991411011, 50.46966991411009], [-91.0, 50.25], [-91.25, 50.35355339059328], [-91.32322330470339, 50.32322330470336], [-91.46966991411011, 49.96966991411009], [-92.0, 49.75], [-92.25, 49.85355339059328], [-92.5, 49.75], [-92.75, 49.85355339059328], [-93.0, 49.75], [-93.25, 49.85355339059328], [-93.5, 49.75], [-93.75, 49.85355339059328], [-94.0, 49.75], [-94.25, 49.85355339059328], [-94.5, 49.75], [-94.75, 49.85355339059328], [-95.0, 49.75], [-95.25, 49.85355339059328], [-95.5, 49.75], [-96.03033008588989, 49.96966991411009], [-96.17677669529661, 50.32322330470336], [-96.53033008588989, 50.46966991411009], [-96.75, 51.0], [-96.64644660940672, 51.25], [-96.67677669529661, 51.32322330470336], [-97.03033008588989, 51.46966991411009], [-97.25, 52.0], [-97.14644660940672, 52.25], [-97.25, 52.5], [-97.14644660940672, 52.75], [-97.25, 53.0], [-97.14644660940672, 53.25], [-97.17677669529661, 53.32322330470336]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.85579925962827}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.347485502513182}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.545575752494756, 7.064590112323458, 3.650984479578426, 7.427691414338881]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.069521593582294, 4.211396639368161, 1.6976361334428702, 5.3795345684822]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.257054913389531, -7.2217919620326425, -10.91575925722385, -7.302998995423421]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.344199956946568, -9.693791843285794, -13.85579925962827, -9.290933785643233]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5688380230839138, -1.7415061487152192, -2.6378101955251663, -1.7440560645555356]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9260863833884503, -2.052822156704016, -3.2567639418620615, -2.263955249709068]}}