{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:26.752295", "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": "2012-Sep-25_to_2012-Sep-30_357.0_39.5"}, "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": 2012090000923}, "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": "September 25 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 30 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 130299.89113313092}, "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": ["Portugal", "Spain"]}, "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": ["Europe"]}, "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": 39.5}, "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": 357.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "357.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 351.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 358.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.53, 39.47], [-6.75, 40.0], [-6.53, 40.53], [-6.0, 40.75], [-5.75, 40.65], [-5.5, 40.75], [-5.25, 40.65], [-5.0, 40.75], [-4.47, 40.53], [-4.25, 40.0], [-4.47, 39.47], [-5.0, 39.25], [-5.25, 39.35], [-5.5, 39.25], [-5.75, 39.35], [-6.0, 39.25], [-6.53, 39.47]]]]}, "2012-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.75, 38.5], [-8.53, 39.03], [-8.18, 39.18], [-8.03, 39.53], [-7.68, 39.68], [-7.53, 40.03], [-7.0, 40.25], [-6.75, 40.15], [-6.68, 40.18], [-6.53, 40.53], [-6.0, 40.75], [-5.75, 40.65], [-5.5, 40.75], [-5.25, 40.65], [-5.0, 40.75], [-4.47, 40.53], [-4.32, 40.18], [-4.25, 40.15], [-4.0, 40.25], [-3.75, 40.15], [-3.5, 40.25], [-3.25, 40.15], [-3.0, 40.25], [-2.75, 40.15], [-2.5, 40.25], [-2.25, 40.15], [-2.0, 40.25], [-1.47, 40.03], [-1.25, 39.5], [-1.47, 38.97], [-1.82, 38.82], [-1.85, 38.75], [-1.75, 38.5], [-1.97, 37.97], [-2.32, 37.82], [-2.47, 37.47], [-3.0, 37.25], [-3.25, 37.35], [-3.5, 37.25], [-3.75, 37.35], [-3.82, 37.32], [-3.97, 36.97], [-4.5, 36.75], [-4.75, 36.85], [-5.0, 36.75], [-5.25, 36.85], [-5.5, 36.75], [-6.03, 36.97], [-6.18, 37.32], [-6.25, 37.35], [-6.5, 37.25], [-6.75, 37.35], [-7.0, 37.25], [-7.25, 37.35], [-7.5, 37.25], [-8.03, 37.47], [-8.18, 37.82], [-8.53, 37.97], [-8.75, 38.5]]]]}, "2012-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.75, 38.5], [-8.53, 39.03], [-8.18, 39.18], [-8.03, 39.53], [-7.68, 39.68], [-7.53, 40.03], [-7.0, 40.25], [-6.75, 40.15], [-6.68, 40.18], [-6.53, 40.53], [-6.0, 40.75], [-5.75, 40.65], [-5.5, 40.75], [-5.25, 40.65], [-5.0, 40.75], [-4.47, 40.53], [-4.32, 40.18], [-4.25, 40.15], [-4.0, 40.25], [-3.75, 40.15], [-3.5, 40.25], [-3.25, 40.15], [-3.0, 40.25], [-2.75, 40.15], [-2.5, 40.25], [-2.25, 40.15], [-2.0, 40.25], [-1.75, 40.15], [-1.5, 40.25], [-0.97, 40.03], [-0.75, 39.5], [-0.97, 38.97], [-1.5, 38.75], [-1.75, 38.85], [-1.82, 38.82], [-1.85, 38.75], [-1.75, 38.5], [-1.97, 37.97], [-2.32, 37.82], [-2.47, 37.47], [-3.0, 37.25], [-3.25, 37.35], [-3.5, 37.25], [-3.75, 37.35], [-3.82, 37.32], [-3.97, 36.97], [-4.5, 36.75], [-4.75, 36.85], [-4.87, 36.8], [-4.75, 36.5], [-4.97, 35.97], [-5.5, 35.75], [-6.03, 35.97], [-6.18, 36.32], [-6.53, 36.47], [-6.75, 37.0], [-6.65, 37.25], [-6.68, 37.32], [-6.75, 37.35], [-7.0, 37.25], [-7.25, 37.35], [-7.5, 37.25], [-8.03, 37.47], [-8.18, 37.82], [-8.53, 37.97], [-8.75, 38.5]]]]}, "2012-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.75, 38.5], [-8.53, 39.03], [-8.18, 39.18], [-8.03, 39.53], [-7.68, 39.68], [-7.53, 40.03], [-7.0, 40.25], [-6.75, 40.15], [-6.5, 40.25], [-6.25, 40.15], [-6.0, 40.25], [-5.75, 40.15], [-5.5, 40.25], [-5.25, 40.15], [-5.0, 40.25], [-4.75, 40.15], [-4.5, 40.25], [-4.25, 40.15], [-4.0, 40.25], [-3.75, 40.15], [-3.5, 40.25], [-3.25, 40.15], [-3.0, 40.25], [-2.75, 40.15], [-2.5, 40.25], [-2.25, 40.15], [-2.0, 40.25], [-1.75, 40.15], [-1.5, 40.25], [-0.97, 40.03], [-0.75, 39.5], [-0.97, 38.97], [-1.5, 38.75], [-1.75, 38.85], [-1.82, 38.82], [-1.85, 38.75], [-1.75, 38.5], [-1.97, 37.97], 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"value": -4.363427605154221}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.524816810382447, 15.556842948943086, 14.989065773562459, 15.126093480775523, 15.607702989690665, 14.088205621573422]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.338593187958395, 12.30855376283597, 12.60386280472352, 12.966147483239013, 12.239713187173663, 13.356892753106251]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.6932284761268193, -4.134533317199469, -4.710327959632558, -4.531778312190877, -3.9125821861484478, -4.081699754700291]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.7244703764993687, -5.048535089531299, -5.56697980557243, -5.669186331340427, -4.574587466754053, 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