{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:39.117697", "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-Mar-04_to_2023-Mar-07_10.0_73.0"}, "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": 2023030000220}, "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": "March 04 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 07 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": 55993.5372107669}, "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": ["Svalbard and Jan Mayen"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": ["Greenland Sea", "Norwegian 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": 73.0}, "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": 10.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "10.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 7.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 72.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 75.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[7.25, 72.85], [7.0, 72.75], [6.47, 72.97], [6.25, 73.5], [6.35, 73.75], [6.25, 74.0], [6.35, 74.25], [6.25, 74.5], [6.47, 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72.82], [7.25, 72.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe", "Arctic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.0, 72.25], [7.47, 72.47], [7.25, 73.0], [7.47, 73.53], [8.0, 73.75], [8.25, 73.65], [8.5, 73.75], [8.75, 73.65], [9.0, 73.75], [9.25, 73.65], [9.5, 73.75], [9.75, 73.65], [10.0, 73.75], [10.25, 73.65], [10.5, 73.75], [11.03, 73.53], [11.25, 73.0], [11.15, 72.75], [11.18, 72.68], [11.53, 72.53], [11.75, 72.0], [11.53, 71.47], [11.0, 71.25], [10.47, 71.47], [10.32, 71.82], [10.25, 71.85], [10.0, 71.75], [9.75, 71.85], [9.5, 71.75], [9.25, 71.85], [9.0, 71.75], [8.47, 71.97], [8.32, 72.32], [8.25, 72.35], [8.0, 72.25]]]]}, "2023-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.25, 74.0], [6.35, 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t2m", "description": "The daily evolution of maximum t2m.", "value": [-4.184322115011128, -8.85153342844194, -8.108641925371842, -8.414431259402988]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9497866622134037, -5.731791640878028, -5.372851355297957, -5.364358326337163]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.045902074528271, -6.4513321980664955, -5.925935971451054, -6.260652309883483]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3553023443194745, -1.7395000373303027, -1.6502332694131872, -1.5968388426139353]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.375368081048419, -1.937774741285114, -1.970201146397548, -1.6943136527934877]}}