{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:59:13.161332", "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": "2026-Apr-07_to_2026-Apr-13_353.0_32.0"}, "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": 2026040000209}, "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": "April 07 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 13 2026"}, "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": 342685.7004311185}, "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": ["Algeria", "Mauritania", "Morocco"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "N.Atlantic-Ocean", "Sahara"]}, "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": ["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": 32.0}, "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": 353.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "353.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 345.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 355.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.03, 33.53], [-14.68, 33.68], [-14.53, 34.03], [-14.0, 34.25], [-13.75, 34.15], [-13.68, 34.18], [-13.53, 34.53], [-13.0, 34.75], [-12.75, 34.65], [-12.5, 34.75], [-12.25, 34.65], [-12.0, 34.75], [-11.75, 34.65], [-11.5, 34.75], [-10.97, 34.53], [-10.75, 34.0], [-10.97, 33.47], [-11.5, 33.25], [-11.75, 33.35], [-11.82, 33.32], [-11.97, 32.97], [-12.32, 32.82], [-12.47, 32.47], [-13.0, 32.25], [-13.25, 32.35], [-13.32, 32.32], [-13.47, 31.97], [-14.0, 31.75], [-14.25, 31.85], [-14.5, 31.75], [-15.03, 31.97], [-15.25, 32.5], [-15.15, 32.75], [-15.25, 33.0], [-15.03, 33.53]]]]}, "2026-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.15, 31.25], [-15.25, 31.5], [-15.04, 32.0], [-15.25, 32.5], [-15.15, 32.75], [-15.25, 33.0], [-15.03, 33.53], [-14.68, 33.68], [-14.53, 34.03], [-14.0, 34.25], [-13.75, 34.15], [-13.68, 34.18], [-13.53, 34.53], [-13.0, 34.75], [-12.75, 34.65], [-12.5, 34.75], [-12.25, 34.65], [-12.0, 34.75], [-11.75, 34.65], [-11.5, 34.75], [-10.97, 34.53], [-10.75, 34.0], [-10.93, 33.57], [-10.5, 33.75], [-10.25, 33.65], [-10.0, 33.75], [-9.75, 33.65], [-9.5, 33.75], [-9.25, 33.65], [-9.0, 33.75], [-8.47, 33.53], [-8.25, 33.0], [-8.43, 32.57], [-8.0, 32.75], [-7.75, 32.65], [-7.5, 32.75], [-7.25, 32.65], [-7.18, 32.68], [-7.03, 33.03], [-6.5, 33.25], [-5.97, 33.03], [-5.75, 32.5], [-5.97, 31.97], [-6.32, 31.82], [-6.47, 31.47], [-6.82, 31.32], [-6.97, 30.97], [-7.5, 30.75], [-7.75, 30.85], [-7.87, 30.8], [-7.75, 30.5], [-7.97, 29.97], [-8.5, 29.75], [-8.93, 29.93], [-8.75, 29.5], [-8.97, 28.97], [-9.5, 28.75], [-10.03, 28.97], [-10.2, 29.38], [-10.32, 29.32], [-10.47, 28.97], [-11.0, 28.75], [-11.25, 28.85], [-11.5, 28.75], [-11.75, 28.85], [-12.0, 28.75], [-12.25, 28.85], [-12.5, 28.75], [-12.75, 28.85], [-13.0, 28.75], [-13.25, 28.85], [-13.5, 28.75], [-14.03, 28.97], [-14.18, 29.32], [-14.53, 29.47], [-14.68, 29.82], [-15.03, 29.97], [-15.25, 30.5], [-15.15, 30.75], [-15.25, 31.0], [-15.15, 31.25]], [[-11.5, 33.25], [-11.75, 33.35], [-11.82, 33.32], [-11.93, 33.07], [-11.5, 33.25]], [[-11.25, 33.15], [-11.18, 33.18], [-11.07, 33.43], [-11.5, 33.25], [-11.25, 33.15]], [[-8.68, 32.18], [-8.57, 32.43], [-8.82, 32.32], [-8.87, 32.2], [-8.75, 32.15], [-8.68, 32.18]], [[-12.32, 32.82], [-12.43, 32.57], [-12.18, 32.68], [-12.07, 32.93], [-12.32, 32.82]]]]}, "2026-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.15, 31.25], [-15.25, 31.5], [-15.04, 32.0], [-15.25, 32.5], [-15.15, 32.75], [-15.25, 33.0], [-15.03, 33.53], [-14.68, 33.68], [-14.53, 34.03], [-14.0, 34.25], [-13.75, 34.15], [-13.68, 34.18], [-13.53, 34.53], [-13.0, 34.75], [-12.75, 34.65], [-12.5, 34.75], [-12.25, 34.65], [-12.0, 34.75], [-11.75, 34.65], [-11.5, 34.75], [-10.97, 34.53], [-10.75, 34.0], [-10.93, 33.57], [-10.5, 33.75], [-10.25, 33.65], [-10.0, 33.75], [-9.75, 33.65], [-9.5, 33.75], [-9.25, 33.65], [-9.0, 33.75], [-8.47, 33.53], [-8.25, 33.0], [-8.43, 32.57], [-8.0, 32.75], [-7.75, 32.65], [-7.5, 32.75], [-7.25, 32.65], [-7.18, 32.68], [-7.03, 33.03], [-6.5, 33.25], [-5.97, 33.03], [-5.75, 32.5], [-5.85, 32.25], [-5.75, 32.0], [-5.97, 31.47], [-6.5, 31.25], [-6.75, 31.35], [-6.82, 31.32], [-6.97, 30.97], [-7.37, 30.8], [-7.25, 30.5], [-7.35, 30.25], [-7.25, 30.0], [-7.47, 29.47], [-7.82, 29.32], [-7.87, 29.2], [-7.47, 29.03], [-7.25, 28.5], [-7.03, 29.03], [-6.5, 29.25], [-5.97, 29.03], [-5.82, 28.68], [-5.47, 28.53], [-5.25, 28.0], [-5.47, 27.47], [-5.82, 27.32], [-5.97, 26.97], [-6.32, 26.82], [-6.47, 26.47], [-7.0, 26.25], [-7.25, 26.35], [-7.32, 26.32], [-7.47, 25.97], [-8.0, 25.75], [-8.25, 25.85], [-8.5, 25.75], [-8.75, 25.85], [-9.0, 25.75], [-9.53, 25.97], [-9.75, 26.5], [-9.65, 26.75], [-9.75, 27.0], [-9.65, 27.25], [-9.75, 27.5], [-9.65, 27.75], [-9.68, 27.82], [-10.03, 27.97], [-10.25, 28.5], [-10.15, 28.75], [-10.25, 29.0], [-10.15, 29.25], [-10.2, 29.38], [-10.32, 29.32], [-10.47, 28.97], [-11.0, 28.75], [-11.25, 28.85], [-11.5, 28.75], [-11.75, 28.85], [-12.0, 28.75], [-12.25, 28.85], [-12.5, 28.75], [-12.75, 28.85], [-13.0, 28.75], [-13.25, 28.85], [-13.5, 28.75], [-14.03, 28.97], [-14.18, 29.32], [-14.53, 29.47], [-14.68, 29.82], [-15.03, 29.97], [-15.25, 30.5], [-15.15, 30.75], [-15.25, 31.0], [-15.15, 31.25]], [[-7.35, 28.25], [-7.32, 28.18], [-7.25, 28.15], [-7.18, 28.18], [-7.15, 28.25], [-7.25, 28.5], [-7.35, 28.25]], [[-11.5, 33.25], [-11.75, 33.35], [-11.82, 33.32], [-11.93, 33.07], [-11.5, 33.25]], [[-11.25, 33.15], [-11.18, 33.18], [-11.07, 33.43], [-11.5, 33.25], [-11.25, 33.15]], [[-8.87, 32.2], [-8.75, 32.15], [-8.68, 32.18], [-8.57, 32.43], [-8.82, 32.32], [-8.87, 32.2]], [[-12.32, 32.82], [-12.43, 32.57], [-12.18, 32.68], [-12.07, 32.93], [-12.32, 32.82]]]]}, "2026-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.15, 31.25], [-15.25, 31.5], [-15.03, 32.03], [-14.68, 32.18], [-14.53, 32.53], [-14.0, 32.75], [-13.75, 32.65], [-13.5, 32.75], [-13.25, 32.65], [-13.0, 32.75], [-12.5, 32.54], [-12.18, 32.68], [-12.03, 33.03], [-11.5, 33.25], [-11.25, 33.15], [-11.18, 33.18], [-11.03, 33.53], [-10.5, 33.75], [-10.25, 33.65], [-10.0, 33.75], [-9.75, 33.65], [-9.5, 33.75], [-9.25, 33.65], [-9.0, 33.75], [-8.47, 33.53], [-8.25, 33.0], [-8.43, 32.57], [-8.0, 32.75], [-7.75, 32.65], [-7.5, 32.75], [-7.25, 32.65], [-7.18, 32.68], [-7.03, 33.03], [-6.5, 33.25], [-5.97, 33.03], [-5.75, 32.5], [-5.85, 32.25], [-5.75, 32.0], [-5.97, 31.47], [-6.5, 31.25], [-6.75, 31.35], [-6.82, 31.32], [-6.85, 31.25], [-6.75, 31.0], [-6.97, 30.47], [-7.32, 30.32], [-7.35, 30.25], [-7.25, 30.0], [-7.47, 29.47], [-7.82, 29.32], [-7.87, 29.2], [-7.47, 29.03], [-7.25, 28.5], [-7.03, 29.03], [-6.5, 29.25], [-5.97, 29.03], [-5.82, 28.68], [-5.47, 28.53], [-5.25, 28.0], [-5.47, 27.47], [-5.82, 27.32], [-5.97, 26.97], [-6.32, 26.82], [-6.47, 26.47], [-7.0, 26.25], [-7.25, 26.35], [-7.32, 26.32], [-7.47, 25.97], [-8.0, 25.75], [-8.25, 25.85], [-8.5, 25.75], [-8.75, 25.85], [-9.0, 25.75], [-9.53, 25.97], [-9.75, 26.5], [-9.65, 26.75], [-9.75, 27.0], [-9.65, 27.25], [-9.75, 27.5], [-9.65, 27.75], [-9.68, 27.82], [-10.03, 27.97], [-10.25, 28.5], [-10.15, 28.75], [-10.25, 29.0], [-10.15, 29.25], [-10.2, 29.38], [-10.32, 29.32], [-10.47, 28.97], [-11.0, 28.75], [-11.25, 28.85], [-11.5, 28.75], [-11.75, 28.85], [-12.0, 28.75], [-12.25, 28.85], [-12.5, 28.75], [-12.75, 28.85], [-13.0, 28.75], [-13.25, 28.85], [-13.5, 28.75], [-14.03, 28.97], [-14.18, 29.32], [-14.53, 29.47], [-14.68, 29.82], [-15.03, 29.97], [-15.25, 30.5], [-15.15, 30.75], [-15.25, 31.0], [-15.15, 31.25]], [[-7.35, 28.25], [-7.32, 28.18], [-7.25, 28.15], [-7.18, 28.18], [-7.15, 28.25], [-7.25, 28.5], [-7.35, 28.25]], [[-8.87, 32.2], [-8.75, 32.15], [-8.68, 32.18], [-8.57, 32.43], [-8.82, 32.32], [-8.87, 32.2]]]]}, "2026-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.15, 29.25], [-10.25, 29.5], [-10.03, 30.03], [-9.68, 30.18], [-9.62, 30.3], [-10.03, 30.47], [-10.25, 31.0], [-10.15, 31.25], [-10.25, 31.5], [-10.03, 32.03], [-9.5, 32.25], [-9.25, 32.15], [-9.0, 32.25], [-8.75, 32.15], [-8.5, 32.25], [-8.25, 32.15], [-8.18, 32.18], [-8.03, 32.53], [-7.68, 32.68], [-7.53, 33.03], [-7.0, 33.25], [-6.75, 33.15], [-6.68, 33.18], [-6.53, 33.53], [-6.0, 33.75], [-5.75, 33.65], [-5.5, 33.75], [-4.97, 33.53], [-4.82, 33.18], [-4.47, 33.03], [-4.25, 32.5], [-4.47, 31.97], [-5.0, 31.75], [-5.5, 31.96], [-5.82, 31.82], [-5.97, 31.47], [-6.5, 31.25], [-6.75, 31.35], [-6.82, 31.32], [-6.85, 31.25], [-6.75, 31.0], [-6.97, 30.47], [-7.32, 30.32], [-7.35, 30.25], [-7.25, 30.0], [-7.47, 29.47], [-7.82, 29.32], [-7.87, 29.2], [-7.47, 29.03], [-7.25, 28.5], [-7.03, 29.03], [-6.5, 29.25], [-5.97, 29.03], [-5.82, 28.68], [-5.47, 28.53], [-5.25, 28.0], [-5.47, 27.47], [-5.82, 27.32], [-5.97, 26.97], [-6.32, 26.82], [-6.47, 26.47], [-7.0, 26.25], [-7.25, 26.35], [-7.32, 26.32], [-7.47, 25.97], [-8.0, 25.75], [-8.25, 25.85], [-8.5, 25.75], [-8.75, 25.85], [-9.0, 25.75], [-9.53, 25.97], [-9.75, 26.5], [-9.65, 26.75], [-9.75, 27.0], [-9.65, 27.25], [-9.75, 27.5], [-9.65, 27.75], [-9.68, 27.82], [-10.03, 27.97], [-10.25, 28.5], [-10.15, 28.75], [-10.25, 29.0], [-10.15, 29.25]], [[-7.35, 28.25], [-7.32, 28.18], [-7.25, 28.15], [-7.18, 28.18], [-7.15, 28.25], [-7.25, 28.5], [-7.35, 28.25]]]]}, "2026-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.25, 31.5], [-10.03, 32.03], [-9.5, 32.25], [-9.25, 32.15], [-9.0, 32.25], [-8.75, 32.15], [-8.5, 32.25], [-8.25, 32.15], [-8.18, 32.18], [-8.03, 32.53], [-7.68, 32.68], [-7.53, 33.03], [-7.0, 33.25], [-6.75, 33.15], [-6.68, 33.18], [-6.53, 33.53], [-6.0, 33.75], [-5.75, 33.65], [-5.5, 33.75], [-4.97, 33.53], [-4.82, 33.18], [-4.47, 33.03], [-4.25, 32.5], [-4.47, 31.97], [-5.0, 31.75], [-5.5, 31.96], [-5.82, 31.82], [-5.97, 31.47], [-6.5, 31.25], [-6.75, 31.35], [-6.82, 31.32], [-6.85, 31.25], [-6.75, 31.0], [-6.97, 30.47], [-7.5, 30.25], [-8.0, 30.46], [-8.5, 30.25], [-8.75, 30.35], [-9.0, 30.25], [-9.53, 30.47], [-9.68, 30.82], [-10.03, 30.97], [-10.25, 31.5]]]]}, "2026-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.53, 30.97], [-9.75, 31.5], [-9.53, 32.03], [-9.0, 32.25], [-8.75, 32.15], [-8.5, 32.25], [-8.2, 32.12], [-8.03, 32.53], [-7.68, 32.68], [-7.53, 33.03], [-7.0, 33.25], [-6.75, 33.15], [-6.68, 33.18], [-6.53, 33.53], [-6.0, 33.75], [-5.75, 33.65], [-5.5, 33.75], [-4.97, 33.53], [-4.82, 33.18], [-4.47, 33.03], [-4.25, 32.5], [-4.47, 31.97], [-5.0, 31.75], [-5.5, 31.96], [-6.0, 31.75], [-6.25, 31.85], [-6.32, 31.82], [-6.47, 31.47], [-7.0, 31.25], [-7.25, 31.35], [-7.5, 31.25], [-7.8, 31.38], [-7.97, 30.97], [-8.5, 30.75], [-8.75, 30.85], [-9.0, 30.75], [-9.53, 30.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.86082347054213}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.1297278472700256}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.217167518252438, 14.839295265891394, 14.94844399540807, 14.893004561915575, 13.973000316130879, 10.123189993465644, 11.227151489257778]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.839418029785179, 8.145252482096396, 6.558157857259118, 5.855039215087913, 3.6327199300130246, 5.050158437093103, 4.991352335612021]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2777285217141485, -2.065392029114764, -2.9808103199871954, -3.1947259780457546, -4.884355849893831, -4.659277370571808, -4.466196693875366]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.5183081123104216, -5.944924223002602, -6.843199785065394, -6.86082347054213, -6.430146209435065, -5.701801939538996, -5.547875074916988]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4683997282287227, -1.8537505499028493, -1.8035426641341252, -1.7273311941261462, -1.494812656520966, -1.5155904947561012, -1.4009184191108566]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7440974285693136, -2.421073295748296, -2.8116537898940686, -2.596039764191556, -2.161088973204142, -1.7722182862168578, -1.6697884248331223]}}