{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:52.320482", "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": "2025-Aug-05_to_2025-Aug-09_13.0_30.5"}, "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": 2025080000278}, "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": "August 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 09 2025"}, "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": 55816.64064054386}, "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": 30.5}, "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": 13.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "13.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 12.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[12.25, 31.65], [12.38, 31.7], [12.25, 32.0], [12.47, 32.53], [13.0, 32.75], [13.25, 32.65], [13.5, 32.75], [14.03, 32.53], [14.18, 32.18], [14.53, 32.03], [14.68, 31.68], [15.03, 31.53], [15.25, 31.0], [15.03, 30.47], [14.68, 30.32], [14.65, 30.25], [14.75, 30.0], [14.65, 29.75], [14.75, 29.5], [14.53, 28.97], [14.0, 28.75], [13.75, 28.85], [13.5, 28.75], [12.97, 28.97], [12.82, 29.32], [12.75, 29.35], [12.5, 29.25], [11.97, 29.47], [11.82, 29.82], [11.47, 29.97], [11.25, 30.5], [11.35, 30.75], [11.25, 31.0], [11.47, 31.53], [12.0, 31.75], [12.25, 31.65]]]]}}, "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": {"2025-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.0, 31.25], [12.47, 31.47], [12.25, 32.0], [12.47, 32.53], [13.0, 32.75], [13.25, 32.65], [13.5, 32.75], [14.03, 32.53], [14.25, 32.0], [14.03, 31.47], [13.5, 31.25], [13.25, 31.35], [13.0, 31.25]]]]}, "2025-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.0, 30.25], [11.47, 30.47], [11.25, 31.0], [11.47, 31.53], [12.0, 31.75], [12.25, 31.65], [12.38, 31.7], [12.25, 32.0], [12.47, 32.53], [13.0, 32.75], [13.25, 32.65], [13.5, 32.75], [14.03, 32.53], [14.18, 32.18], [14.53, 32.03], [14.68, 31.68], [15.03, 31.53], [15.25, 31.0], [15.03, 30.47], [14.68, 30.32], [14.53, 29.97], [14.0, 29.75], [13.75, 29.85], [13.5, 29.75], [13.25, 29.85], [13.0, 29.75], [12.47, 29.97], [12.32, 30.32], [12.25, 30.35], [12.0, 30.25]]]]}, "2025-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, 31.0], [11.47, 31.53], [12.0, 31.75], [12.25, 31.65], [12.38, 31.7], [12.25, 32.0], [12.47, 32.53], [13.0, 32.75], [13.25, 32.65], [13.5, 32.75], [14.03, 32.53], [14.18, 32.18], [14.53, 32.03], [14.68, 31.68], [15.03, 31.53], [15.25, 31.0], [15.03, 30.47], [14.68, 30.32], [14.65, 30.25], [14.75, 30.0], [14.65, 29.75], [14.75, 29.5], [14.53, 28.97], [14.0, 28.75], [13.75, 28.85], [13.5, 28.75], [12.97, 28.97], [12.82, 29.32], [12.75, 29.35], [12.5, 29.25], [11.97, 29.47], [11.82, 29.82], [11.47, 29.97], [11.25, 30.5], [11.35, 30.75], [11.25, 31.0]]]]}, "2025-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, 31.0], [11.47, 31.53], [12.0, 31.75], [12.25, 31.65], [12.5, 31.75], [12.75, 31.65], [12.82, 31.68], [12.97, 32.03], [13.5, 32.25], [13.75, 32.15], [14.0, 32.25], [14.53, 32.03], [14.68, 31.68], [15.03, 31.53], [15.25, 31.0], [15.03, 30.47], [14.68, 30.32], [14.65, 30.25], [14.75, 30.0], [14.65, 29.75], [14.75, 29.5], [14.53, 28.97], [14.0, 28.75], [13.75, 28.85], [13.5, 28.75], [12.97, 28.97], [12.82, 29.32], [12.75, 29.35], [12.5, 29.25], [11.97, 29.47], [11.82, 29.82], [11.47, 29.97], [11.25, 30.5], [11.35, 30.75], [11.25, 31.0]]]]}, "2025-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, 31.0], [11.47, 31.53], [12.0, 31.75], [12.25, 31.65], [12.5, 31.75], [12.75, 31.65], [13.0, 31.75], [13.53, 31.53], [13.68, 31.18], [13.75, 31.15], [14.0, 31.25], [14.53, 31.03], [14.75, 30.5], [14.65, 30.25], [14.75, 30.0], [14.65, 29.75], [14.75, 29.5], [14.53, 28.97], [14.0, 28.75], [13.75, 28.85], [13.5, 28.75], [12.97, 28.97], [12.82, 29.32], [12.75, 29.35], [12.5, 29.25], [11.97, 29.47], [11.82, 29.82], [11.47, 29.97], [11.25, 30.5], [11.35, 30.75], [11.25, 31.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.141026313009775}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.875007424899563}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.69497578938808, 26.371046369503688, 26.546031479608473, 26.624955214115573, 26.746801721482086]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.35309753417971, 23.681392923990927, 24.511410013834677, 25.75318044026693, 25.999888356526696]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.0999025299723257, -2.798756417924984, -2.857266288342024, -2.977140604403249, -2.801686449018299]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.365452828954119, -4.141026313009775, -3.3423592062017633, -3.416118589875964, -3.0933472926306536]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.255070001160742, -1.2920503367506049, -1.3091275046209636, -1.3883337375296028, -1.283540855210304]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3221767935329165, -1.5852467491763356, -1.468468250105596, -1.6013843947673734, -1.4851132953544972]}}