{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:08.974291", "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-09_to_2025-Jul-12_21.5_48.0"}, "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": 2025070000431}, "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 09 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 12 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": 52870.39457794404}, "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": ["Hungary", "Romania", "Slovakia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["West&Central-Europe"]}, "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": 48.0}, "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": 21.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 20.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 24.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.35, 48.25], [20.25, 48.5], [20.47, 49.03], [21.0, 49.25], [21.25, 49.15], [21.5, 49.25], [21.75, 49.15], [22.0, 49.25], [22.53, 49.03], [22.75, 48.5], [22.65, 48.25], [22.68, 48.18], [23.03, 48.03], [23.18, 47.68], [23.25, 47.65], [23.5, 47.75], [24.03, 47.53], [24.25, 47.0], [24.13, 46.7], [24.53, 46.53], [24.75, 46.0], [24.53, 45.47], [24.0, 45.25], [23.75, 45.35], [23.68, 45.32], [23.53, 44.97], [23.18, 44.82], [23.03, 44.47], [22.5, 44.25], [22.25, 44.35], [22.0, 44.25], [21.47, 44.47], [21.25, 45.0], [21.35, 45.25], [21.25, 45.5], [21.35, 45.75], [21.25, 46.0], [21.46, 46.5], [21.32, 46.82], [21.25, 46.85], [21.0, 46.75], [20.47, 46.97], [20.25, 47.5], [20.35, 47.75], [20.25, 48.0], [20.35, 48.25]]]]}, "2025-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.35, 48.25], [20.25, 48.5], [20.47, 49.03], [21.0, 49.25], [21.25, 49.15], [21.5, 49.25], [21.75, 49.15], [22.0, 49.25], [22.53, 49.03], [22.75, 48.5], [22.65, 48.25], [22.68, 48.18], [23.03, 48.03], [23.18, 47.68], [23.25, 47.65], [23.5, 47.75], [24.03, 47.53], [24.25, 47.0], [24.13, 46.7], [24.53, 46.53], [24.75, 46.0], [24.53, 45.47], [24.0, 45.25], [23.75, 45.35], [23.68, 45.32], [23.53, 44.97], [23.18, 44.82], [23.03, 44.47], [22.5, 44.25], [22.25, 44.35], [22.0, 44.25], [21.47, 44.47], [21.25, 45.0], [21.35, 45.25], [21.25, 45.5], [21.35, 45.75], [21.25, 46.0], [21.46, 46.5], [21.32, 46.82], [21.25, 46.85], [21.0, 46.75], [20.47, 46.97], [20.25, 47.5], [20.35, 47.75], [20.25, 48.0], [20.35, 48.25]]]]}, "2025-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.35, 48.25], [20.25, 48.5], [20.47, 49.03], [21.0, 49.25], [21.25, 49.15], [21.5, 49.25], [21.75, 49.15], [22.0, 49.25], [22.53, 49.03], [22.75, 48.5], [22.65, 48.25], [22.68, 48.18], [23.03, 48.03], [23.18, 47.68], [23.25, 47.65], [23.5, 47.75], [24.03, 47.53], [24.25, 47.0], [24.13, 46.7], [24.53, 46.53], [24.75, 46.0], [24.53, 45.47], [24.0, 45.25], [23.75, 45.35], [23.68, 45.32], [23.53, 44.97], [23.18, 44.82], [23.03, 44.47], [22.5, 44.25], [22.25, 44.35], [22.0, 44.25], [21.47, 44.47], [21.25, 45.0], [21.35, 45.25], [21.25, 45.5], [21.35, 45.75], [21.25, 46.0], [21.46, 46.5], [21.32, 46.82], [21.25, 46.85], [21.0, 46.75], [20.47, 46.97], [20.25, 47.5], [20.35, 47.75], [20.25, 48.0], [20.35, 48.25]]]]}, "2025-07-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.5, 48.75], [22.03, 48.53], [22.25, 48.0], [22.03, 47.47], [21.5, 47.25], [20.97, 47.47], [20.75, 48.0], [20.97, 48.53], [21.5, 48.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.104222025840045}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.788509812985825}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.193545532226608, 15.46272801717123, 15.755676625569663, 18.377539571126306]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.861856079101585, 10.634417470296228, 10.60075149536135, 18.377539571126306]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.074813795277566, -4.809708547093865, -4.502385155672666, -4.254058335820275]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.104222025840045, -5.713557136718634, -5.4250748313710915, -4.254058335820275]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6517955550644907, -1.5655466581158128, -1.463085245243664, -1.2809168151476624]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.035174938261022, -1.7329246539409202, -1.7365725302561035, -1.2809168151476624]}}