{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:57:43.173092", "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-Nov-26_to_2025-Nov-29_4.5_36.0"}, "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": 2025110000651}, "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": "November 26 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 29 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 52418.58419058233}, "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"]}, "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": ["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 - Western 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": 36.0}, "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": 4.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "4.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 3.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 9.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.5, 37.25], [4.75, 37.15], [5.0, 37.25], [5.53, 37.03], [5.68, 36.68], [5.75, 36.65], [6.0, 36.75], [6.25, 36.65], [6.32, 36.68], [6.47, 37.03], [7.0, 37.25], [7.5, 37.04], [7.82, 37.18], [7.97, 37.53], [8.5, 37.75], [8.75, 37.65], [9.0, 37.75], [9.53, 37.53], [9.75, 37.0], [9.65, 36.75], [9.75, 36.5], [9.53, 35.97], [9.0, 35.75], [8.75, 35.85], [8.68, 35.82], [8.53, 35.47], [8.0, 35.25], [7.75, 35.35], [7.68, 35.32], [7.53, 34.97], [7.0, 34.75], [6.75, 34.85], [6.5, 34.75], [6.25, 34.85], [6.0, 34.75], [5.47, 34.97], [5.32, 35.32], [5.25, 35.35], [5.0, 35.25], [4.75, 35.35], [4.5, 35.25], [4.25, 35.35], [4.0, 35.25], [3.47, 35.47], [3.25, 36.0], [3.47, 36.53], [3.82, 36.68], [3.97, 37.03], [4.5, 37.25]]]]}, "2025-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.5, 37.25], [4.75, 37.15], [5.0, 37.25], [5.53, 37.03], [5.68, 36.68], [5.75, 36.65], [6.0, 36.75], [6.25, 36.65], [6.32, 36.68], [6.47, 37.03], [7.0, 37.25], [7.5, 37.04], [7.82, 37.18], [7.97, 37.53], [8.5, 37.75], [8.75, 37.65], [9.0, 37.75], [9.53, 37.53], [9.75, 37.0], [9.65, 36.75], [9.75, 36.5], [9.53, 35.97], [9.0, 35.75], [8.75, 35.85], [8.68, 35.82], [8.53, 35.47], [8.0, 35.25], [7.75, 35.35], [7.68, 35.32], [7.53, 34.97], [7.0, 34.75], [6.75, 34.85], [6.5, 34.75], [6.25, 34.85], [6.0, 34.75], [5.5, 34.96], [5.0, 34.75], [4.47, 34.97], [4.32, 35.32], [4.25, 35.35], [4.0, 35.25], [3.47, 35.47], [3.25, 36.0], [3.47, 36.53], [3.82, 36.68], [3.97, 37.03], [4.5, 37.25]]]]}, "2025-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.5, 37.25], [4.75, 37.15], [5.0, 37.25], [5.53, 37.03], [5.68, 36.68], [5.75, 36.65], [6.0, 36.75], [6.25, 36.65], [6.32, 36.68], [6.47, 37.03], [7.0, 37.25], [7.5, 37.04], [7.82, 37.18], [7.97, 37.53], [8.5, 37.75], [8.75, 37.65], [9.0, 37.75], [9.53, 37.53], [9.75, 37.0], [9.65, 36.75], [9.75, 36.5], [9.53, 35.97], [9.0, 35.75], [8.75, 35.85], [8.68, 35.82], [8.53, 35.47], [8.0, 35.25], [7.75, 35.35], [7.68, 35.32], [7.53, 34.97], [7.0, 34.75], [6.75, 34.85], [6.5, 34.75], [6.25, 34.85], [6.0, 34.75], [5.5, 34.96], [5.0, 34.75], [4.47, 34.97], [4.32, 35.32], [4.25, 35.35], [4.0, 35.25], [3.47, 35.47], [3.25, 36.0], [3.47, 36.53], [3.82, 36.68], [3.97, 37.03], [4.5, 37.25]]]]}, "2025-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.75, 36.0], [3.97, 36.53], [4.5, 36.75], [5.03, 36.53], [5.18, 36.18], [5.53, 36.03], [5.75, 35.5], [5.53, 34.97], [5.0, 34.75], [4.47, 34.97], [4.32, 35.32], [3.97, 35.47], [3.75, 36.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.642155174930053}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.333685184396449}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.543878428141284, 4.899863058423307, 6.53671659439334, 6.302301025390648]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.939809417724632, 0.8064463297526459, 2.5598363240559934, 5.764621988932333]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8906774638798423, -5.445500120468715, -3.702767278564043, -3.714343572043987]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.609813055146219, -6.642155174930053, -4.5856252730670235, -4.094961437517156]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.649177830961711, -2.305833843335086, -1.5793551463317104, -1.6389410158010538]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9032183095731725, -2.6727825124337685, -1.8491014541800874, -1.805136892348814]}}