{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:31.086979", "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": "2019-Apr-19_to_2019-Apr-23_354.5_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": 2019040000553}, "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 19 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 23 2019"}, "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": 85687.48125149484}, "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", "Morocco"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "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": 354.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "354.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 354.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 359.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.0, 34.75], [-4.75, 34.65], [-4.5, 34.75], [-3.97, 34.53], 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34.03], [0.25, 33.5], [0.03, 32.97], [-0.32, 32.82], [-0.47, 32.47], [-0.82, 32.32], [-0.97, 31.97], [-1.32, 31.82], [-1.47, 31.47], [-1.82, 31.32], [-1.97, 30.97], [-2.5, 30.75], [-2.75, 30.85], [-3.0, 30.75], [-3.53, 30.97], [-3.7, 31.38], [-4.0, 31.25], [-4.25, 31.35], [-4.5, 31.25], [-4.8, 31.38], [-4.97, 30.97], [-5.5, 30.75], [-6.03, 30.97], [-6.25, 31.5], [-6.15, 31.75], [-6.25, 32.0], [-6.03, 32.53]]]]}, "2019-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.03, 32.53], [-5.68, 32.68], [-5.54, 33.0], [-5.75, 33.5], [-5.65, 33.75], [-5.75, 34.0], [-5.53, 34.53], [-5.0, 34.75], [-4.75, 34.65], [-4.5, 34.75], [-3.97, 34.53], [-3.82, 34.18], [-3.5, 34.04], [-3.18, 34.18], [-3.03, 34.53], [-2.68, 34.68], [-2.53, 35.03], [-2.0, 35.25], [-1.47, 35.03], [-1.25, 34.5], [-1.43, 34.07], [-1.0, 34.25], [-0.75, 34.15], [-0.5, 34.25], [0.03, 34.03], [0.25, 33.5], [0.03, 32.97], [-0.32, 32.82], [-0.47, 32.47], [-0.82, 32.32], [-0.97, 31.97], [-1.32, 31.82], [-1.47, 31.47], [-1.82, 31.32], [-1.97, 30.97], [-2.5, 30.75], [-2.75, 30.85], [-3.0, 30.75], [-3.53, 30.97], [-3.7, 31.38], [-4.0, 31.25], [-4.25, 31.35], [-4.5, 31.25], [-4.8, 31.38], [-4.97, 30.97], [-5.5, 30.75], [-6.03, 30.97], [-6.25, 31.5], [-6.15, 31.75], [-6.25, 32.0], [-6.03, 32.53]]]]}, "2019-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.03, 32.53], [-5.68, 32.68], [-5.53, 33.03], [-5.18, 33.18], [-5.03, 33.53], [-4.68, 33.68], [-4.53, 34.03], [-4.0, 34.25], [-3.5, 34.04], [-3.0, 34.25], [-2.75, 34.15], [-2.5, 34.25], [-2.25, 34.15], [-2.0, 34.25], [-1.5, 34.04], [-1.0, 34.25], [-0.75, 34.15], [-0.5, 34.25], [0.03, 34.03], [0.25, 33.5], [0.03, 32.97], [-0.32, 32.82], [-0.47, 32.47], [-0.82, 32.32], [-0.97, 31.97], [-1.32, 31.82], [-1.47, 31.47], [-1.82, 31.32], [-1.97, 30.97], [-2.5, 30.75], [-2.75, 30.85], [-3.0, 30.75], [-3.53, 30.97], [-3.7, 31.38], [-4.0, 31.25], [-4.25, 31.35], [-4.5, 31.25], [-4.8, 31.38], [-4.97, 30.97], [-5.5, 30.75], [-6.03, 30.97], [-6.25, 31.5], [-6.15, 31.75], [-6.25, 32.0], [-6.03, 32.53]], [[-3.7, 32.88], [-3.82, 32.82], [-3.85, 32.75], [-3.82, 32.68], [-3.57, 32.57], [-3.7, 32.88]]]]}, "2019-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.5, 32.75], [-4.97, 32.53], [-4.75, 32.0], [-4.97, 31.47], [-5.5, 31.25], [-6.03, 31.47], [-6.25, 32.0], [-6.03, 32.53], [-5.5, 32.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.890237427616}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.613726216108894}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.82728338974988, 9.484001792584081, 9.360336766082469, 11.000808170829714, 3.8718200315705076]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.421588030421788, 1.910524826015319, 1.9991211853964046, 3.1457433853723273, 3.8718200315705076]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.789851502431972, -6.030444443974037, -6.148352733519933, -4.9873077593854855, -5.097227206218861]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.394225917280551, -7.890237427616, -7.700925538915669, -6.151602204819824, -5.097227206218861]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.302407471086567, -1.822683361824205, -1.8610130907733788, -1.4541293151816332, -1.5039668257151146]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4375502615872693, -2.3104391614307813, -2.10009742534121, -1.70795499205976, -1.5039668257151146]}}