{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:06.450244", "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": "2021-Dec-07_to_2021-Dec-09_278.5_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": 2021120000309}, "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": "December 07 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 09 2021"}, "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": 96103.02287439688}, "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": 51.0}, "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": 278.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "278.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 276.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 281.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 52.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-84.53, 51.03], [-84.18, 51.18], [-84.03, 51.53], [-83.68, 51.68], [-83.53, 52.03], [-83.18, 52.18], [-83.15, 52.25], [-83.25, 52.5], [-83.03, 53.03], [-82.5, 53.25], [-82.25, 53.15], [-82.0, 53.25], [-81.47, 53.03], [-81.32, 52.68], [-80.97, 52.53], [-80.82, 52.18], [-80.47, 52.03], [-80.32, 51.68], [-80.25, 51.65], [-80.0, 51.75], [-79.75, 51.65], [-79.5, 51.75], [-79.25, 51.65], [-79.0, 51.75], [-78.47, 51.53], [-78.32, 51.18], [-77.97, 51.03], [-77.75, 50.5], [-77.97, 49.97], [-78.32, 49.82], [-78.47, 49.47], [-79.0, 49.25], [-79.25, 49.35], [-79.5, 49.25], [-79.75, 49.35], [-80.0, 49.25], [-80.25, 49.35], [-80.5, 49.25], [-80.75, 49.35], [-80.82, 49.32], [-80.97, 48.97], [-81.5, 48.75], [-81.75, 48.85], [-81.82, 48.82], [-81.97, 48.47], [-82.5, 48.25], [-82.75, 48.35], [-83.0, 48.25], [-83.53, 48.47], [-83.68, 48.82], [-84.03, 48.97], [-84.25, 49.5], [-84.15, 49.75], [-84.18, 49.82], [-84.53, 49.97], [-84.75, 50.5], [-84.53, 51.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.52999999999997, 49.97], [-84.75, 50.5], [-84.52999999999997, 51.03], [-84.18, 51.18], [-84.02999999999997, 51.53], [-83.68, 51.68], [-83.52999999999997, 52.03], [-83.18, 52.18], [-83.14999999999998, 52.25], [-83.25, 52.5], [-83.02999999999997, 53.03], [-82.5, 53.25], [-82.25, 53.15], [-82.0, 53.25], [-81.47000000000003, 53.03], [-81.32, 52.68], [-80.97000000000003, 52.53], [-80.82, 52.18], [-80.47000000000003, 52.03], [-80.32, 51.68], [-80.25, 51.65], [-80.0, 51.75], [-79.75, 51.65], [-79.5, 51.75], [-79.25, 51.65], [-79.0, 51.75], [-78.47000000000003, 51.53], [-78.32, 51.18], [-77.97000000000003, 51.03], [-77.75, 50.5], [-77.97000000000003, 49.97], [-78.32, 49.82], [-78.47000000000003, 49.47], [-79.0, 49.25], [-79.25, 49.35], [-79.5, 49.25], [-79.75, 49.35], [-80.0, 49.25], [-80.25, 49.35], [-80.5, 49.25], [-80.75, 49.35], [-80.82, 49.32], [-80.97000000000003, 48.97], [-81.5, 48.75], [-81.75, 48.85], [-81.82, 48.82], [-81.97000000000003, 48.47], [-82.5, 48.25], [-82.75, 48.35], [-83.0, 48.25], [-83.52999999999997, 48.47], [-83.68, 48.82], [-84.02999999999997, 48.97], [-84.25, 49.5], [-84.14999999999998, 49.75], [-84.18, 49.82], [-84.52999999999997, 49.97]]]]}, "2021-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.52999999999997, 49.97], [-84.75, 50.5], [-84.52999999999997, 51.03], [-84.18, 51.18], [-84.02999999999997, 51.53], [-83.68, 51.68], [-83.52999999999997, 52.03], [-83.18, 52.18], [-83.14999999999998, 52.25], [-83.25, 52.5], [-83.02999999999997, 53.03], [-82.5, 53.25], [-82.25, 53.15], [-82.0, 53.25], [-81.47000000000003, 53.03], [-81.32, 52.68], [-80.97000000000003, 52.53], [-80.82, 52.18], [-80.47000000000003, 52.03], [-80.32, 51.68], [-80.25, 51.65], [-80.0, 51.75], [-79.75, 51.65], [-79.5, 51.75], [-79.25, 51.65], [-79.0, 51.75], [-78.47000000000003, 51.53], [-78.32, 51.18], [-77.97000000000003, 51.03], [-77.75, 50.5], [-77.97000000000003, 49.97], [-78.32, 49.82], [-78.47000000000003, 49.47], [-79.0, 49.25], [-79.25, 49.35], [-79.5, 49.25], [-79.75, 49.35], [-80.0, 49.25], [-80.25, 49.35], [-80.5, 49.25], [-80.75, 49.35], [-80.82, 49.32], [-80.97000000000003, 48.97], [-81.5, 48.75], [-81.75, 48.85], [-81.82, 48.82], [-81.97000000000003, 48.47], [-82.5, 48.25], [-82.75, 48.35], [-83.0, 48.25], [-83.52999999999997, 48.47], [-83.68, 48.82], [-84.02999999999997, 48.97], [-84.25, 49.5], [-84.14999999999998, 49.75], [-84.18, 49.82], [-84.52999999999997, 49.97]]]]}, "2021-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.52999999999997, 49.97], [-84.75, 50.5], [-84.52999999999997, 51.03], [-84.18, 51.18], [-84.02999999999997, 51.53], [-83.68, 51.68], [-83.52999999999997, 52.03], [-83.18, 52.18], [-83.14999999999998, 52.25], [-83.25, 52.5], [-83.02999999999997, 53.03], [-82.5, 53.25], [-82.25, 53.15], [-82.0, 53.25], [-81.47000000000003, 53.03], [-81.32, 52.68], [-80.97000000000003, 52.53], [-80.82, 52.18], [-80.47000000000003, 52.03], [-80.32, 51.68], [-80.25, 51.65], [-80.0, 51.75], [-79.75, 51.65], [-79.5, 51.75], [-79.25, 51.65], [-79.0, 51.75], [-78.47000000000003, 51.53], [-78.32, 51.18], [-77.97000000000003, 51.03], [-77.75, 50.5], [-77.97000000000003, 49.97], [-78.32, 49.82], [-78.47000000000003, 49.47], [-79.0, 49.25], [-79.25, 49.35], [-79.5, 49.25], [-79.75, 49.35], [-80.0, 49.25], [-80.25, 49.35], [-80.5, 49.25], [-80.75, 49.35], [-80.82, 49.32], [-80.97000000000003, 48.97], [-81.5, 48.75], [-81.75, 48.85], [-81.82, 48.82], [-81.97000000000003, 48.47], [-82.5, 48.25], [-82.75, 48.35], [-83.0, 48.25], [-83.52999999999997, 48.47], [-83.68, 48.82], [-84.02999999999997, 48.97], [-84.25, 49.5], [-84.14999999999998, 49.75], [-84.18, 49.82], [-84.52999999999997, 49.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.706846226890349}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.93797651154161}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-23.052910061343596, -23.529365001375908, -24.0912996432169]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-25.398181747887776, -26.137786212956513, -27.289196722210733]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-12.122788415749728, -11.94802768692746, -11.743113431947664]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-13.81859201028388, -14.120757593148824, -14.706846226890349]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7518353860779323, -1.678326716934664, -1.6003306433102829]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9536872965351235, -1.9521185564802004, -1.958311498861446]}}