{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:54:15.515492", "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": "2025-Jan-12_to_2025-Jan-15_309.0_71.0"}, "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": 2025010000358}, "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": "January 12 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 15 2025"}, "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": 59057.25672298035}, "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": ["Greenland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": ["Baffin Bay"]}, "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": 71.0}, "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": 309.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "309.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 307.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 313.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 68.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 72.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.75, 71.5], [-52.53, 72.03], [-52.0, 72.25], [-51.75, 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[-46.25, 69.0], [-46.47, 68.47], [-46.82, 68.32], [-46.97, 67.97], [-47.5, 67.75], [-47.75, 67.85], [-48.0, 67.75], [-48.25, 67.85], [-48.5, 67.75], [-48.75, 67.85], [-49.0, 67.75], [-49.25, 67.85], [-49.5, 67.75], [-50.03, 67.97], [-50.25, 68.5], [-50.15, 68.75], [-50.18, 68.82], [-50.53, 68.97], [-50.75, 69.5], [-50.65, 69.75], [-50.68, 69.82], [-50.75, 69.85], [-51.0, 69.75], [-51.25, 69.85], [-51.5, 69.75], [-52.03, 69.97], [-52.18, 70.32], [-52.53, 70.47], [-52.68, 70.82], [-53.03, 70.97], [-53.25, 71.5]]]]}, "2025-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.25, 71.5], [-53.03, 72.03], [-52.5, 72.25], [-52.25, 72.15], [-52.0, 72.25], [-51.75, 72.15], [-51.5, 72.25], [-51.25, 72.15], [-51.18, 72.18], [-51.03, 72.53], [-50.5, 72.75], [-50.25, 72.65], [-50.0, 72.75], [-49.75, 72.65], [-49.5, 72.75], [-49.25, 72.65], [-49.0, 72.75], [-48.75, 72.65], [-48.5, 72.75], [-48.25, 72.65], [-48.0, 72.75], [-47.75, 72.65], [-47.5, 72.75], [-46.97, 72.53], [-46.75, 72.0], [-46.97, 71.47], [-47.32, 71.32], [-47.35, 71.25], [-47.32, 71.18], [-46.97, 71.03], [-46.75, 70.5], [-46.85, 70.25], [-46.82, 70.18], [-46.47, 70.03], [-46.25, 69.5], [-46.35, 69.25], [-46.25, 69.0], [-46.47, 68.47], [-46.82, 68.32], [-46.97, 67.97], [-47.5, 67.75], [-47.75, 67.85], [-48.0, 67.75], [-48.25, 67.85], [-48.5, 67.75], [-48.75, 67.85], [-49.0, 67.75], [-49.25, 67.85], [-49.5, 67.75], [-50.03, 67.97], [-50.25, 68.5], [-50.15, 68.75], [-50.18, 68.82], [-50.53, 68.97], [-50.75, 69.5], [-50.65, 69.75], [-50.68, 69.82], [-50.75, 69.85], [-51.0, 69.75], [-51.25, 69.85], [-51.5, 69.75], [-52.03, 69.97], [-52.18, 70.32], [-52.53, 70.47], [-52.68, 70.82], [-53.03, 70.97], [-53.25, 71.5]]]]}, "2025-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.25, 71.5], [-53.03, 72.03], [-52.5, 72.25], [-52.25, 72.15], [-52.0, 72.25], [-51.75, 72.15], [-51.5, 72.25], [-51.25, 72.15], [-51.18, 72.18], [-51.03, 72.53], [-50.5, 72.75], [-50.25, 72.65], 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anomaly recorded over entire duration", "value": -14.617714224241553}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.760361307417268}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-27.665750975835834, -30.847509877165834, -34.066392432318736, -30.23926674915336]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-30.171401087443, -39.34650904337562, -40.673461659749336, -37.84439570109046]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.270862437776291, -9.952774341445732, -13.165330015052715, -9.345900479568924]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.41935386355567, -11.442064449001066, -14.617714224241553, -11.954547159322686]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4714256941504311, -1.536650246118003, -2.03342208051803, -1.4341365884506614]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5939275470012926, -1.726602795055201, -2.255850962879383, -1.8439361262681313]}}