{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:27.149575", "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-Jul-26_to_2025-Aug-01_6.0_36.5"}, "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": 2025070000988}, "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": "July 26 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 01 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 59761.47661522473}, "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": ["Mediterranean Sea"]}, "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": 36.5}, "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": 6.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "6.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 4.5}, "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": 35.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[4.5, 37.25], [4.75, 37.15], [5.0, 37.25], [5.25, 37.15], [5.5, 37.25], [5.75, 37.15], [5.82, 37.18], [5.97, 37.53], [6.5, 37.75], [7.0, 37.54], [7.5, 37.75], [8.03, 37.53], [8.18, 37.18], [8.25, 37.15], [8.5, 37.25], [8.75, 37.15], [8.82, 37.18], [8.97, 37.53], [9.5, 37.75], [10.03, 37.53], [10.18, 37.18], [10.53, 37.03], [10.75, 36.5], [10.53, 35.97], [10.18, 35.82], [10.03, 35.47], [9.68, 35.32], [9.53, 34.97], [9.0, 34.75], [8.75, 34.85], [8.5, 34.75], [7.97, 34.97], [7.82, 35.32], [7.75, 35.35], [7.5, 35.25], [7.25, 35.35], [7.0, 35.25], [6.75, 35.35], [6.5, 35.25], [5.97, 35.47], [5.82, 35.82], [5.75, 35.85], [5.5, 35.75], [5.25, 35.85], [5.0, 35.75], [4.75, 35.85], [4.5, 35.75], [3.97, 35.97], [3.75, 36.5], [3.97, 37.03], [4.5, 37.25]]]]}}, "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": {"2025-07-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.0, 35.75], [5.47, 35.97], [5.25, 36.5], [5.47, 37.03], [6.0, 37.25], [6.25, 37.15], [6.5, 37.25], [7.03, 37.03], [7.25, 36.5], [7.03, 35.97], [6.5, 35.75], [6.25, 35.85], [6.0, 35.75]]]]}, "2025-07-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.0, 35.75], [5.47, 35.97], [5.25, 36.5], [5.47, 37.03], [6.0, 37.25], [6.25, 37.15], [6.5, 37.25], [7.03, 37.03], [7.25, 36.5], [7.03, 35.97], [6.5, 35.75], [6.25, 35.85], [6.0, 35.75]]]]}, "2025-07-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.0, 35.75], [5.47, 35.97], [5.25, 36.5], [5.47, 37.03], [6.0, 37.25], [6.25, 37.15], [6.5, 37.25], [7.03, 37.03], [7.25, 36.5], [7.03, 35.97], [6.5, 35.75], [6.25, 35.85], [6.0, 35.75]]]]}, "2025-07-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.5, 35.75], [3.97, 35.97], [3.75, 36.5], [3.97, 37.03], [4.5, 37.25], [4.75, 37.15], [5.0, 37.25], [5.25, 37.15], [5.5, 37.25], [5.75, 37.15], [6.0, 37.25], [6.25, 37.15], [6.5, 37.25], [6.75, 37.15], [7.0, 37.25], [7.25, 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mean t2m.", "value": [22.127426401774073, 22.78051401774087, 23.868188476562523, 23.23859709482349, 22.921180555555623, 23.84715296427413, 25.199645826551716]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.82229131062826, 22.523352559407556, 23.620222981770837, 21.464737192789755, 21.398614501953148, 22.32078577677413, 24.825649515787802]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.854558081062947, -4.121142298900168, -3.067387527038619, -3.8224341593377393, -4.271568352849859, -3.4116131779954912, -2.103517863778412]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.998782549369025, -4.224214893919623, -3.1851814829929594, -4.806340234036725, -5.55425913105347, -4.4385268417175325, -2.5355566443287216]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7970318556508054, -1.6108349039900027, -1.2318386270330133, -1.524957028683612, -1.7675061893242232, -1.4822165540412138, -1.2190116918730594]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8133819055553357, -1.6114681869131056, -1.2444010689981118, -1.7728824719219438, -2.085108343549105, -1.7416601966477936, -1.244559372228878]}}