{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:23.013272", "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": "2023-Apr-10_to_2023-Apr-12_19.5_26.5"}, "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": 2023040000468}, "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 10 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 60060.72418150629}, "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": ["Libya"]}, "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": 26.5}, "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": 19.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "19.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 17.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[16.75, 29.5], [16.97, 30.03], [17.5, 30.25], [17.75, 30.15], [18.0, 30.25], [18.53, 30.03], [18.68, 29.68], [19.03, 29.53], [19.18, 29.18], [19.25, 29.15], [19.5, 29.25], [20.03, 29.03], [20.25, 28.5], [20.15, 28.25], [20.25, 28.0], [20.15, 27.75], [20.18, 27.68], [20.53, 27.53], [20.75, 27.0], [20.65, 26.75], [20.75, 26.5], [20.53, 25.97], [20.0, 25.75], [19.75, 25.85], [19.5, 25.75], [19.25, 25.85], [19.0, 25.75], [18.47, 25.97], [18.32, 26.32], [17.97, 26.47], [17.75, 27.0], [17.96, 27.5], [17.82, 27.82], [17.75, 27.85], [17.5, 27.75], [16.97, 27.97], [16.75, 28.5], [16.85, 28.75], [16.75, 29.0], [16.85, 29.25], [16.75, 29.5]]]]}}, "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": {"2023-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, 29.0], [16.85, 29.25], [16.75, 29.5], [16.97, 30.03], [17.5, 30.25], [17.75, 30.15], [18.0, 30.25], [18.53, 30.03], [18.68, 29.68], [19.03, 29.53], [19.18, 29.18], [19.25, 29.15], [19.5, 29.25], [20.03, 29.03], [20.25, 28.5], [20.15, 28.25], [20.25, 28.0], [20.15, 27.75], [20.18, 27.68], [20.53, 27.53], [20.75, 27.0], [20.65, 26.75], [20.75, 26.5], [20.53, 25.97], [20.0, 25.75], [19.75, 25.85], [19.5, 25.75], [19.25, 25.85], [19.0, 25.75], [18.47, 25.97], [18.32, 26.32], [17.97, 26.47], [17.75, 27.0], [17.96, 27.5], [17.82, 27.82], [17.75, 27.85], [17.5, 27.75], [16.97, 27.97], [16.75, 28.5], [16.85, 28.75], [16.75, 29.0]]]]}, "2023-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, 29.0], [16.85, 29.25], [16.75, 29.5], [16.97, 30.03], [17.5, 30.25], [17.75, 30.15], [18.0, 30.25], [18.53, 30.03], [18.68, 29.68], [19.03, 29.53], [19.18, 29.18], [19.25, 29.15], [19.5, 29.25], [20.03, 29.03], [20.25, 28.5], [20.15, 28.25], [20.25, 28.0], [20.15, 27.75], [20.18, 27.68], [20.53, 27.53], [20.75, 27.0], [20.65, 26.75], [20.75, 26.5], [20.53, 25.97], [20.0, 25.75], [19.75, 25.85], [19.5, 25.75], [19.25, 25.85], [19.0, 25.75], [18.47, 25.97], [18.32, 26.32], [17.97, 26.47], [17.75, 27.0], [17.96, 27.5], [17.82, 27.82], [17.75, 27.85], [17.5, 27.75], [16.97, 27.97], [16.75, 28.5], [16.85, 28.75], [16.75, 29.0]]]]}, "2023-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.75, 29.0], [16.85, 29.25], [16.75, 29.5], [16.97, 30.03], [17.5, 30.25], [17.75, 30.15], [18.0, 30.25], [18.53, 30.03], [18.68, 29.68], [19.03, 29.53], [19.18, 29.18], [19.25, 29.15], [19.5, 29.25], [20.03, 29.03], [20.25, 28.5], [20.15, 28.25], [20.25, 28.0], [20.15, 27.75], [20.18, 27.68], [20.53, 27.53], [20.75, 27.0], [20.65, 26.75], [20.75, 26.5], [20.53, 25.97], [20.0, 25.75], [19.75, 25.85], [19.5, 25.75], [19.25, 25.85], [19.0, 25.75], [18.47, 25.97], [18.32, 26.32], [17.97, 26.47], [17.75, 27.0], [17.96, 27.5], [17.82, 27.82], [17.75, 27.85], [17.5, 27.75], [16.97, 27.97], [16.75, 28.5], [16.85, 28.75], [16.75, 29.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.479758755306705}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.875622594390623}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.17435745620577, 15.95310503904932, 15.89238413073258]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.316744094620901, 13.986852966740969, 15.110798085711508]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.407639020786302, -5.915669612272291, -6.3035591501132755]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.866240179888621, -6.213778648566063, -7.479758755306705]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2659488867736037, -1.3682564551932346, -1.464552191049505]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3167866541307116, -1.49073022327891, -1.8062087951647647]}}