{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:49.719702", "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-Jan-17_to_2026-Jan-21_355.0_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": 2026010000526}, "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 17 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 21 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 76107.67050619065}, "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": ["Morocco"]}, "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": []}, "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": 355.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "355.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 351.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 355.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-8.75, 31.65], [-8.5, 31.75], [-8.25, 31.65], [-8.18, 31.68], [-8.03, 32.03], [-7.68, 32.18], [-7.62, 32.3], [-8.03, 32.47], [-8.25, 33.0], [-8.03, 33.53], [-7.5, 33.75], [-7.25, 33.65], [-7.0, 33.75], [-6.75, 33.65], [-6.68, 33.68], [-6.53, 34.03], [-6.0, 34.25], [-5.75, 34.15], [-5.5, 34.25], [-5.25, 34.15], [-5.0, 34.25], [-4.47, 34.03], [-4.25, 33.5], [-4.35, 33.25], [-4.32, 33.18], [-3.97, 33.03], [-3.75, 32.5], [-3.85, 32.25], [-3.75, 32.0], [-3.97, 31.47], [-4.5, 31.25], [-4.75, 31.35], [-4.82, 31.32], [-4.97, 30.97], [-5.32, 30.82], [-5.47, 30.47], [-6.0, 30.25], [-6.25, 30.35], [-6.5, 30.25], [-6.8, 30.38], [-6.97, 29.97], [-7.32, 29.82], [-7.47, 29.47], [-8.0, 29.25], [-8.53, 29.47], [-8.7, 29.88], [-9.0, 29.75], [-9.53, 29.97], [-9.75, 30.5], [-9.65, 30.75], [-9.75, 31.0], [-9.53, 31.53], [-9.0, 31.75], [-8.75, 31.65]], [[-5.87, 32.2], [-5.75, 32.15], [-5.68, 32.18], [-5.67, 32.2], [-5.63, 32.3], [-5.75, 32.35], [-5.82, 32.32], [-5.87, 32.2]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.0, 32.25], [-7.529999999999973, 32.47], [-7.75, 33.0], [-7.529999999999973, 33.53], [-7.0, 33.75], [-6.75, 33.65], [-6.680000000000007, 33.68], [-6.529999999999973, 34.03], [-6.0, 34.25], [-5.75, 34.15], [-5.5, 34.25], [-5.25, 34.15], [-5.0, 34.25], [-4.470000000000027, 34.03], [-4.25, 33.5], [-4.350000000000023, 33.25], [-4.25, 33.0], [-4.470000000000027, 32.47], [-5.0, 32.25], [-5.25, 32.35], [-5.5, 32.25], [-5.75, 32.35], [-6.0, 32.25], [-6.25, 32.35], [-6.5, 32.25], [-6.75, 32.35], [-7.0, 32.25]]]]}, "2026-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.75, 31.0], [-9.529999999999973, 31.53], [-9.0, 31.75], [-8.75, 31.65], [-8.5, 31.75], [-8.25, 31.65], [-8.180000000000007, 31.68], [-8.029999999999973, 32.03], [-7.680000000000007, 32.18], 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32.15], [-5.680000000000007, 32.18], [-5.6200000000000045, 32.3]]]]}, "2026-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.029999999999973, 33.03], [-4.5, 33.25], [-3.9700000000000273, 33.03], [-3.75, 32.5], [-3.8500000000000227, 32.25], [-3.75, 32.0], [-3.9700000000000273, 31.47], [-4.5, 31.25], [-4.75, 31.35], [-5.0, 31.25], [-5.529999999999973, 31.47], [-5.75, 32.0], [-5.529999999999973, 32.53], [-5.180000000000007, 32.68], [-5.029999999999973, 33.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.900477056999705}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.511500986173876}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.7643905639648665, 2.1824841027972752, 2.2509742736816065, 3.0757678731282567, 1.5104313320583742]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.7499425252278229, -3.4736592610676666, -4.025881195068337, -4.040583038330055, 0.015205637613973977]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3615420527819353, -4.8633629762232315, -4.79070524896294, -4.135021779694512, -4.615077751775705]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.977490809312087, -6.47013550094772, -7.900477056999705, -6.20590367040711, -5.231655590933883]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4670913968438526, -1.9968859435717925, -1.9119238648058223, -1.6299971785892513, -1.7009956577961611]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6435138262205988, -2.5171104853779918, -3.0707143798120575, -2.0960870351180936, -2.0254741593666266]}}