{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:04.137281", "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": "2022-May-13_to_2022-May-17_309.5_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": 2022050000552}, "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": "May 13 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 17 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 85745.23927961572}, "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": ["Atlantic Ocean", "Labrador Sea"]}, "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": 309.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "309.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 306.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 310.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-49.47, 51.03], [-49.25, 50.5], [-49.47, 49.97], [-49.82, 49.82], [-49.85, 49.75], [-49.75, 49.5], [-49.97, 48.97], [-50.5, 48.75], [-50.75, 48.85], [-51.0, 48.75], [-51.53, 48.97], [-51.75, 49.5], [-51.65, 49.75], [-51.68, 49.82], [-52.03, 49.97], [-52.18, 50.32], [-52.25, 50.35], [-52.5, 50.25], [-52.75, 50.35], [-53.0, 50.25], [-53.53, 50.47], [-53.68, 50.82], [-54.03, 50.97], [-54.25, 51.5], [-54.15, 51.75], [-54.25, 52.0], [-54.15, 52.25], [-54.18, 52.32], [-54.53, 52.47], [-54.75, 53.0], [-54.65, 53.25], [-54.75, 53.5], [-54.65, 53.75], [-54.75, 54.0], [-54.53, 54.53], [-54.0, 54.75], [-53.75, 54.65], [-53.5, 54.75], [-53.25, 54.65], [-53.0, 54.75], [-52.75, 54.65], [-52.5, 54.75], [-51.97, 54.53], [-51.75, 54.0], [-51.85, 53.75], [-51.82, 53.68], [-51.47, 53.53], [-51.32, 53.18], [-50.97, 53.03], [-50.82, 52.68], [-50.47, 52.53], [-50.32, 52.18], [-49.97, 52.03], [-49.75, 51.5], [-49.85, 51.25], [-49.82, 51.18], [-49.47, 51.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "E.North-America", "N.Atlantic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.02999999999997, 52.97], [-53.25, 53.5], [-53.02999999999997, 54.03], [-52.5, 54.25], [-51.97000000000003, 54.03], [-51.81999999999999, 53.68], [-51.47000000000003, 53.53], [-51.31999999999999, 53.18], [-50.97000000000003, 53.03], [-50.81999999999999, 52.68], [-50.47000000000003, 52.53], [-50.31999999999999, 52.18], [-49.97000000000003, 52.03], [-49.75, 51.5], [-49.85000000000002, 51.25], [-49.75, 51.0], [-49.97000000000003, 50.47], [-50.5, 50.25], [-50.75, 50.35], [-51.0, 50.25], [-51.25, 50.35], [-51.5, 50.25], [-52.02999999999997, 50.47], [-52.25, 51.0], [-52.14999999999998, 51.25], [-52.18000000000001, 51.32], [-52.52999999999997, 51.47], [-52.75, 52.0], [-52.64999999999998, 52.25], [-52.75, 52.5], [-52.64999999999998, 52.75], [-52.68000000000001, 52.82], [-53.02999999999997, 52.97]]]]}, "2022-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.75, 53.5], [-54.64999999999998, 53.75], [-54.75, 54.0], [-54.52999999999997, 54.53], [-54.0, 54.75], [-53.75, 54.65], [-53.5, 54.75], [-53.25, 54.65], [-53.0, 54.75], [-52.75, 54.65], [-52.5, 54.75], [-51.97000000000003, 54.53], [-51.75, 54.0], [-51.85000000000002, 53.75], [-51.81999999999999, 53.68], [-51.47000000000003, 53.53], [-51.31999999999999, 53.18], [-50.97000000000003, 53.03], [-50.81999999999999, 52.68], [-50.47000000000003, 52.53], [-50.31999999999999, 52.18], [-49.97000000000003, 52.03], [-49.75, 51.5], [-49.85000000000002, 51.25], [-49.81999999999999, 51.18], [-49.47000000000003, 51.03], [-49.25, 50.5], [-49.47000000000003, 49.97], [-49.81999999999999, 49.82], [-49.85000000000002, 49.75], [-49.75, 49.5], [-49.97000000000003, 48.97], [-50.5, 48.75], [-50.75, 48.85], [-51.0, 48.75], [-51.52999999999997, 48.97], [-51.75, 49.5], [-51.64999999999998, 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"description": "The daily evolution of maximum t2m.", "value": [-0.06839783485122553, -0.8364354410478541, -0.6942508826368794, -0.8476013470473731, -0.2685808402525822]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8147578664592525, -2.015515562148341, -1.7966887004914447, -2.1764912438874755, -1.648989192039528]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0478653996647154, -2.3879189964951024, -2.0650080452438715, -2.574208428008035, -1.8252162921067452]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3501536337175186, -1.5396834485440833, -1.3614865833867582, -1.6638194898043357, -1.2402565299447512]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.498355258749267, -1.8276954019626757, -1.534399638711388, -1.921973806651054, -1.3203741755837204]}}