{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:22.858590", "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": "2010-Dec-28_to_2011-Jan-03_356.0_5.0"}, "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": 2010120001286}, "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 28 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 03 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 83185.02660137745}, "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": ["C\u00f4te d'Ivoire"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Atlantic-Ocean", "Western-Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": ["Gulf of Guinea", "North Atlantic Ocean"]}, "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": 5.0}, "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": 356.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "356.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 352.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 356.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 3.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 6.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.03, 5.03], [-5.5, 5.25], [-5.25, 5.15], [-5.18, 5.18], [-5.03, 5.53], [-4.5, 5.75], [-4.25, 5.65], [-4.0, 5.75], [-3.47, 5.53], [-3.25, 5.0], [-3.35, 4.75], [-3.25, 4.5], [-3.47, 3.97], [-4.0, 3.75], [-4.25, 3.85], [-4.32, 3.82], [-4.47, 3.47], [-5.0, 3.25], [-5.25, 3.35], [-5.5, 3.25], [-6.03, 3.47], [-6.25, 4.0], [-6.15, 4.25], [-6.25, 4.5], [-6.03, 5.03]]]]}, "2010-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.53, 4.53], [-7.18, 4.68], [-7.03, 5.03], [-6.68, 5.18], [-6.53, 5.53], [-6.0, 5.75], [-5.75, 5.65], [-5.5, 5.75], [-5.25, 5.65], [-5.0, 5.75], [-4.75, 5.65], [-4.5, 5.75], [-4.25, 5.65], [-4.0, 5.75], [-3.47, 5.53], [-3.25, 5.0], [-3.35, 4.75], [-3.25, 4.5], [-3.47, 3.97], [-4.0, 3.75], [-4.25, 3.85], [-4.32, 3.82], [-4.35, 3.75], [-4.25, 3.5], [-4.47, 2.97], [-5.0, 2.75], [-5.5, 2.96], [-6.0, 2.75], [-6.25, 2.85], [-6.5, 2.75], [-6.75, 2.85], [-7.0, 2.75], [-7.53, 2.97], [-7.75, 3.5], [-7.65, 3.75], [-7.75, 4.0], [-7.53, 4.53]]]]}, "2010-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.53, 4.53], [-7.18, 4.68], [-7.03, 5.03], [-6.68, 5.18], [-6.53, 5.53], [-6.0, 5.75], [-5.75, 5.65], [-5.5, 5.75], [-5.25, 5.65], [-5.0, 5.75], [-4.75, 5.65], [-4.5, 5.75], [-4.25, 5.65], [-4.0, 5.75], [-3.47, 5.53], [-3.25, 5.0], [-3.35, 4.75], [-3.25, 4.5], [-3.47, 3.97], [-4.0, 3.75], [-4.25, 3.85], [-4.32, 3.82], [-4.35, 3.75], [-4.25, 3.5], [-4.47, 2.97], [-5.0, 2.75], [-5.5, 2.96], [-6.0, 2.75], [-6.25, 2.85], [-6.5, 2.75], [-6.75, 2.85], [-7.0, 2.75], [-7.53, 2.97], [-7.75, 3.5], [-7.65, 3.75], [-7.75, 4.0], [-7.53, 4.53]]]]}, "2010-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.54, 4.5], [-7.75, 5.0], [-7.65, 5.25], [-7.75, 5.5], [-7.53, 6.03], [-7.0, 6.25], [-6.75, 6.15], [-6.5, 6.25], [-6.0, 6.04], [-5.5, 6.25], [-4.97, 6.03], [-4.82, 5.68], [-4.75, 5.65], [-4.5, 5.75], [-4.25, 5.65], [-4.0, 5.75], [-3.47, 5.53], [-3.25, 5.0], [-3.35, 4.75], [-3.25, 4.5], [-3.47, 3.97], [-4.0, 3.75], [-4.25, 3.85], [-4.32, 3.82], [-4.35, 3.75], [-4.25, 3.5], [-4.47, 2.97], [-5.0, 2.75], [-5.5, 2.96], [-6.0, 2.75], [-6.25, 2.85], [-6.5, 2.75], [-6.75, 2.85], [-7.0, 2.75], [-7.53, 2.97], [-7.75, 3.5], [-7.65, 3.75], [-7.75, 4.0], [-7.54, 4.5]]]]}, "2011-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.0, 6.25], [-6.75, 6.15], [-6.5, 6.25], [-6.0, 6.04], [-5.5, 6.25], [-4.97, 6.03], [-4.75, 5.5], [-4.97, 4.97], [-5.5, 4.75], [-5.8, 4.88], [-5.97, 4.47], [-6.5, 4.25], [-6.75, 4.35], [-7.0, 4.25], [-7.53, 4.47], [-7.75, 5.0], [-7.65, 5.25], [-7.75, 5.5], [-7.53, 6.03], [-7.0, 6.25]]], [[[-4.53, 6.53], [-4.0, 6.75], [-3.47, 6.53], [-3.25, 6.0], [-3.35, 5.75], [-3.25, 5.5], [-3.47, 4.97], [-4.0, 4.75], [-4.53, 4.97], [-4.75, 5.5], [-4.65, 5.75], [-4.75, 6.0], [-4.53, 6.53]]]]}, "2011-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.0, 6.25], [-6.75, 6.15], [-6.5, 6.25], [-6.0, 6.04], [-5.5, 6.25], [-4.97, 6.03], [-4.75, 5.5], [-4.97, 4.97], [-5.5, 4.75], [-5.8, 4.88], [-5.97, 4.47], [-6.5, 4.25], [-6.75, 4.35], [-7.0, 4.25], [-7.53, 4.47], [-7.75, 5.0], [-7.65, 5.25], [-7.75, 5.5], [-7.53, 6.03], [-7.0, 6.25]]], [[[-4.53, 6.53], [-4.0, 6.75], [-3.47, 6.53], [-3.25, 6.0], [-3.35, 5.75], [-3.25, 5.5], [-3.47, 4.97], [-4.0, 4.75], [-4.53, 4.97], [-4.75, 5.5], [-4.65, 5.75], [-4.75, 6.0], [-4.53, 6.53]]]]}, "2011-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.53, 6.53], [-4.0, 6.75], [-3.47, 6.53], [-3.25, 6.0], [-3.35, 5.75], [-3.25, 5.5], [-3.47, 4.97], [-4.0, 4.75], [-4.53, 4.97], [-4.75, 5.5], [-4.65, 5.75], [-4.75, 6.0], [-4.53, 6.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.749930945487904}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.9603766438413923}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.26032283612051, 26.066386894045138, 25.946081438344436, 25.628101071167123, 24.11958366746677, 24.08264155278556, 24.691632895989017]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.20030784209365, 25.31934887015791, 25.37437521228844, 23.71982246344095, 23.635976036842067, 23.720610771186784, 24.562403474310997]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.8258106129038083, -0.8299436527604371, -0.9427387208260967, -0.9214586950819307, -1.2820928388216544, -1.2920384666553315, -1.179001205767804]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.9499812318468912, -0.9936082565935749, -1.1433487061154324, -1.2135880678263788, -1.749930945487904, -1.5886064344786632, -1.3301506840350044]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5245879721774909, -1.5405768983132866, -1.6928732317445114, -1.553433330147595, -1.7164811670864495, -1.6562161019242783, -1.2652633011997552]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.748419906959409, -2.0676227424053994, -2.003865717434341, -1.9958424545972475, -2.2970767235541043, -2.003690249353691, -1.3213571630867222]}}