{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:20.610257", "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-May-29_to_2023-Jun-02_7.0_35.0"}, "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": 2023050000890}, "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": "May 29 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 02 2023"}, "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": 63268.5048243112}, "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", "Tunisia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 35.0}, "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": 7.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "7.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 5.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 10.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[6.03, 36.03], [6.18, 35.68], [6.25, 35.65], [6.32, 35.68], [6.47, 36.03], [7.0, 36.25], [7.25, 36.15], [7.5, 36.25], [7.75, 36.15], [8.0, 36.25], [8.25, 36.15], [8.5, 36.25], [8.75, 36.15], [9.0, 36.25], [9.25, 36.15], [9.32, 36.18], [9.47, 36.53], [10.0, 36.75], [10.53, 36.53], [10.75, 36.0], [10.65, 35.75], [10.75, 35.5], [10.53, 34.97], [10.18, 34.82], [10.03, 34.47], [9.68, 34.32], [9.53, 33.97], [9.0, 33.75], [8.75, 33.85], [8.5, 33.75], [8.25, 33.85], [8.0, 33.75], [7.75, 33.85], [7.5, 33.75], [7.25, 33.85], [7.0, 33.75], [6.5, 33.96], [6.18, 33.82], [6.03, 33.47], [5.5, 33.25], [4.97, 33.47], [4.75, 34.0], [4.96, 34.5], [4.75, 35.0], [4.85, 35.25], [4.75, 35.5], [4.97, 36.03], [5.5, 36.25], [6.03, 36.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.0, 34.25], [6.47, 34.47], [6.25, 35.0], [6.47, 35.53], [7.0, 35.75], [7.53, 35.53], [7.75, 35.0], [7.53, 34.47], [7.0, 34.25]]], [[[9.0, 34.75], [8.47, 34.97], [8.25, 35.5], [8.47, 36.03], [9.0, 36.25], [9.53, 36.03], [9.75, 35.5], [9.53, 34.97], [9.0, 34.75]]]]}, "2023-05-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.5, 34.75], [4.97, 34.97], [4.75, 35.5], [4.97, 36.03], [5.5, 36.25], [6.03, 36.03], [6.25, 35.5], [6.03, 34.97], [5.5, 34.75]]], [[[6.47, 34.47], [6.25, 35.0], [6.47, 35.53], [7.0, 35.75], [7.25, 35.65], [7.5, 35.75], [7.75, 35.65], [8.0, 35.75], [8.25, 35.65], [8.32, 35.68], [8.47, 36.03], [9.0, 36.25], [9.3, 36.13], [9.47, 36.53], [10.0, 36.75], [10.53, 36.53], [10.75, 36.0], [10.53, 35.47], [10.0, 35.25], [9.7, 35.38], [9.65, 35.25], [9.75, 35.0], [9.53, 34.47], [9.0, 34.25], [8.75, 34.35], [8.5, 34.25], [8.25, 34.35], [8.0, 34.25], [7.75, 34.35], [7.5, 34.25], [7.25, 34.35], [7.0, 34.25], [6.47, 34.47]]]]}, "2023-05-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.75, 35.5], [4.97, 36.03], [5.5, 36.25], [6.03, 36.03], [6.18, 35.68], [6.25, 35.65], [6.32, 35.68], [6.47, 36.03], [7.0, 36.25], [7.25, 36.15], [7.5, 36.25], [7.75, 36.15], [8.0, 36.25], [8.25, 36.15], [8.5, 36.25], [8.75, 36.15], [9.0, 36.25], [9.25, 36.15], [9.32, 36.18], [9.47, 36.53], [10.0, 36.75], [10.53, 36.53], [10.75, 36.0], [10.65, 35.75], [10.75, 35.5], [10.53, 34.97], [10.18, 34.82], [10.03, 34.47], [9.68, 34.32], [9.53, 33.97], [9.0, 33.75], [8.75, 33.85], [8.5, 33.75], [8.25, 33.85], [8.0, 33.75], [7.75, 33.85], [7.5, 33.75], [7.25, 33.85], [7.0, 33.75], [6.5, 33.96], [6.18, 33.82], [6.03, 33.47], [5.5, 33.25], [4.97, 33.47], [4.75, 34.0], [4.96, 34.5], [4.75, 35.0], [4.85, 35.25], [4.75, 35.5]]]]}, "2023-06-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.75, 35.5], [4.97, 36.03], [5.5, 36.25], [6.03, 36.03], [6.18, 35.68], [6.25, 35.65], [6.32, 35.68], [6.47, 36.03], [7.0, 36.25], [7.25, 36.15], [7.5, 36.25], [7.75, 36.15], [8.0, 36.25], [8.25, 36.15], [8.5, 36.25], [8.75, 36.15], [9.0, 36.25], [9.25, 36.15], [9.32, 36.18], [9.47, 36.53], [10.0, 36.75], [10.53, 36.53], [10.75, 36.0], [10.65, 35.75], [10.75, 35.5], [10.53, 34.97], [10.18, 34.82], [10.03, 34.47], [9.68, 34.32], [9.53, 33.97], [9.0, 33.75], [8.75, 33.85], [8.5, 33.75], [8.25, 33.85], [8.0, 33.75], [7.75, 33.85], [7.5, 33.75], [7.25, 33.85], [7.0, 33.75], [6.5, 33.96], [6.18, 33.82], [6.03, 33.47], [5.5, 33.25], [4.97, 33.47], [4.75, 34.0], [4.96, 34.5], [4.75, 35.0], [4.85, 35.25], [4.75, 35.5]]]]}, "2023-06-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.75, 35.5], [4.97, 36.03], [5.5, 36.25], [6.03, 36.03], [6.18, 35.68], [6.25, 35.65], [6.32, 35.68], [6.47, 36.03], [7.0, 36.25], [7.25, 36.15], [7.5, 36.25], [7.75, 36.15], [8.0, 36.25], [8.25, 36.15], [8.5, 36.25], [8.75, 36.15], [9.0, 36.25], [9.25, 36.15], [9.5, 36.25], [9.75, 36.15], [10.0, 36.25], [10.53, 36.03], [10.75, 35.5], [10.53, 34.97], [10.18, 34.82], [10.03, 34.47], [9.68, 34.32], [9.53, 33.97], [9.0, 33.75], [8.75, 33.85], [8.5, 33.75], [8.25, 33.85], [8.0, 33.75], [7.75, 33.85], [7.5, 33.75], [7.25, 33.85], [7.0, 33.75], [6.5, 33.96], [6.18, 33.82], [6.03, 33.47], [5.5, 33.25], [4.97, 33.47], [4.75, 34.0], [4.96, 34.5], [4.75, 35.0], [4.85, 35.25], [4.75, 35.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.9835607894765985}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.691404035508055}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.270296451692616, 17.068476507866137, 17.2463856822244, 18.323163887784062, 18.671357939824077]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.16342847448442, 15.743837684914354, 12.948089437505303, 14.407077234457518, 14.991813708430698]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.760586368470001, -4.681894973089491, -6.45847577060739, -5.555133856049001, -5.4483902414421195]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.965974445125994, -5.231832611706579, -7.9835607894765985, -6.734873751090504, -6.653123734503424]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3892638732226938, -1.3643176945134514, -1.8997968046590028, -1.6500929975985164, -1.6180833336792222]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4059155187497057, -1.4384884257802242, -2.26744522055295, -1.9629472429916954, -1.9425333723667078]}}