{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:26.321535", "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-28_to_2023-Jul-31_293.0_56.5"}, "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": 2023070000816}, "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 28 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 31 2023"}, "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": 77793.24634992605}, "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": 56.5}, "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": 293.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "293.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 290.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 295.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-69.18, 57.68], [-69.04, 58.0], [-69.25, 58.5], [-69.03, 59.03], [-68.5, 59.25], [-67.97, 59.03], [-67.82, 58.68], [-67.75, 58.65], [-67.5, 58.75], [-67.25, 58.65], [-67.18, 58.68], [-67.03, 59.03], [-66.5, 59.25], [-65.97, 59.03], [-65.82, 58.68], [-65.75, 58.65], [-65.5, 58.75], [-64.97, 58.53], [-64.82, 58.18], [-64.47, 58.03], [-64.25, 57.5], [-64.35, 57.25], [-64.25, 57.0], [-64.47, 56.47], [-65.0, 56.25], [-65.25, 56.35], [-65.32, 56.32], [-65.47, 55.97], [-66.0, 55.75], [-66.25, 55.85], [-66.5, 55.75], [-66.75, 55.85], [-66.82, 55.82], [-66.97, 55.47], [-67.5, 55.25], [-67.8, 55.38], [-67.85, 55.25], [-67.75, 55.0], [-67.97, 54.47], [-68.5, 54.25], [-68.75, 54.35], [-69.0, 54.25], [-69.25, 54.35], [-69.5, 54.25], [-69.75, 54.35], [-70.0, 54.25], [-70.53, 54.47], [-70.75, 55.0], [-70.53, 55.53], [-70.18, 55.68], [-70.15, 55.75], [-70.18, 55.82], [-70.53, 55.97], [-70.75, 56.5], [-70.65, 56.75], [-70.75, 57.0], [-70.53, 57.53], [-70.0, 57.75], [-69.5, 57.54], [-69.39, 57.59], [-69.18, 57.68]]]]}}, "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": {"2023-07-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.75, 57.0], [-70.52999999999997, 57.53], [-70.0, 57.75], [-69.5, 57.54], [-69.18, 57.68], [-69.04000000000002, 58.0], [-69.25, 58.5], [-69.02999999999997, 59.03], [-68.5, 59.25], [-67.97000000000003, 59.03], [-67.82, 58.68], [-67.75, 58.65], [-67.5, 58.75], [-67.25, 58.65], [-67.18, 58.68], [-67.02999999999997, 59.03], [-66.5, 59.25], [-65.97000000000003, 59.03], [-65.82, 58.68], [-65.75, 58.65], [-65.5, 58.75], [-64.97000000000003, 58.53], [-64.82, 58.18], [-64.47000000000003, 58.03], [-64.25, 57.5], [-64.35000000000002, 57.25], [-64.25, 57.0], [-64.47000000000003, 56.47], [-65.0, 56.25], [-65.25, 56.35], [-65.32, 56.32], [-65.47000000000003, 55.97], [-66.0, 55.75], [-66.25, 55.85], [-66.5, 55.75], [-66.75, 55.85], [-67.0, 55.75], [-67.25, 55.85], [-67.5, 55.75], [-67.75, 55.85], [-67.82, 55.82], [-67.97000000000003, 55.47], [-68.5, 55.25], [-68.75, 55.35], [-69.0, 55.25], [-69.25, 55.35], [-69.5, 55.25], [-70.02999999999997, 55.47], [-70.18, 55.82], [-70.52999999999997, 55.97], [-70.75, 56.5], [-70.64999999999998, 56.75], [-70.75, 57.0]]]]}, "2023-07-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.75, 57.0], [-70.52999999999997, 57.53], [-70.0, 57.75], [-69.5, 57.54], [-69.18, 57.68], [-69.04000000000002, 58.0], [-69.25, 58.5], [-69.02999999999997, 59.03], [-68.5, 59.25], [-67.97000000000003, 59.03], [-67.82, 58.68], [-67.75, 58.65], [-67.5, 58.75], [-67.25, 58.65], [-67.18, 58.68], [-67.02999999999997, 59.03], [-66.5, 59.25], [-65.97000000000003, 59.03], [-65.82, 58.68], [-65.75, 58.65], [-65.5, 58.75], [-64.97000000000003, 58.53], [-64.82, 58.18], [-64.47000000000003, 58.03], [-64.25, 57.5], [-64.35000000000002, 57.25], [-64.25, 57.0], [-64.47000000000003, 56.47], [-65.0, 56.25], [-65.25, 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"anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.187799505585623, -7.16997603582262, -5.063620742349997, -4.0799498612395055]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.688726293124887, -9.322494353479442, -6.304573088726954, -5.475690809511093]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7113434475828806, -2.0584319729676195, -1.521926535206863, -1.3082338164783038]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1275780670849755, -2.502649739867214, -1.9145667907736328, -1.3996145743904433]}}