{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:04.873374", "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-Apr-07_to_2025-Apr-09_17.0_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": 2025040000224}, "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 07 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 09 2025"}, "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": 80672.04782976204}, "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": ["Italy"]}, "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": ["Ionian Sea", "Mediterranean Sea - Eastern Basin"]}, "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": 17.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 16.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.25}, "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": 39.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.35, 37.25], [16.25, 37.5], [16.35, 37.75], [16.25, 38.0], 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[17.0, 40.25], [17.53, 40.03], [17.75, 39.5], [17.65, 39.25], [17.68, 39.18], [17.75, 39.15], [18.0, 39.25], [18.25, 39.15], [18.5, 39.25], [18.75, 39.15], [19.0, 39.25], [19.3, 39.13], [19.47, 39.53], [20.0, 39.75], [20.53, 39.53], [20.75, 39.0], [20.65, 38.75], [20.75, 38.5], [20.65, 38.25], [20.75, 38.0], [20.65, 37.75], [20.75, 37.5], [20.53, 36.97], [20.18, 36.82], [20.03, 36.47], [19.5, 36.25], [19.25, 36.35], [19.18, 36.32], [19.03, 35.97], [18.5, 35.75], [18.25, 35.85], [18.0, 35.75], [17.75, 35.85], [17.5, 35.75], [17.25, 35.85], [17.0, 35.75], [16.47, 35.97], [16.25, 36.5], [16.35, 36.75], [16.25, 37.0], [16.35, 37.25]]]]}, "2025-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.35, 37.25], [16.25, 37.5], [16.35, 37.75], [16.25, 38.0], [16.35, 38.25], [16.25, 38.5], [16.35, 38.75], [16.25, 39.0], [16.35, 39.25], [16.25, 39.5], [16.47, 40.03], [17.0, 40.25], [17.53, 40.03], [17.75, 39.5], [17.65, 39.25], [17.68, 39.18], [17.75, 39.15], [18.0, 39.25], [18.25, 39.15], [18.5, 39.25], [18.75, 39.15], [19.0, 39.25], [19.3, 39.13], [19.47, 39.53], [20.0, 39.75], [20.53, 39.53], [20.75, 39.0], [20.65, 38.75], [20.75, 38.5], [20.65, 38.25], [20.75, 38.0], [20.65, 37.75], [20.75, 37.5], [20.53, 36.97], [20.18, 36.82], [20.03, 36.47], [19.5, 36.25], [19.25, 36.35], [19.18, 36.32], [19.03, 35.97], [18.5, 35.75], [18.25, 35.85], [18.0, 35.75], [17.75, 35.85], [17.5, 35.75], [17.25, 35.85], [17.0, 35.75], [16.47, 35.97], [16.25, 36.5], [16.35, 36.75], [16.25, 37.0], [16.35, 37.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.3006097017007505}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.102603357429211}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.734837911586567, 12.712505479292474, 13.24419490159164]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.04004821777346, 9.409319814046228, 11.011548614501976]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2007610926206804, -2.2895495386419187, -1.817499441025034]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.3006097017007505, -4.000833773242448, -2.870733875800795]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7580351053918823, -1.856775128447307, -1.4975362908949743]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.347524066500065, -2.243307061385714, -1.7391364715100766]}}