{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:15.271904", "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": "2023-Feb-28_to_2023-Mar-04_3.0_35.0"}, "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": 2023020001020}, "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": "February 28 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 04 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 53140.06199495462}, "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"]}, "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": []}, "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": 35.0}, "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": 3.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "3.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -1.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 3.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.25, 35.5], [-1.03, 36.03], [-0.5, 36.25], [-0.25, 36.15], [-0.18, 36.18], [-0.03, 36.53], [0.5, 36.75], [0.75, 36.65], [1.0, 36.75], [1.53, 36.53], [1.68, 36.18], [1.75, 36.15], [2.0, 36.25], [2.53, 36.03], [2.68, 35.68], [2.75, 35.65], [3.0, 35.75], [3.53, 35.53], [3.75, 35.0], [3.53, 34.47], [3.0, 34.25], [2.75, 34.35], [2.68, 34.32], [2.53, 33.97], [2.0, 33.75], [1.75, 33.85], [1.5, 33.75], [1.0, 33.96], [0.5, 33.75], [0.25, 33.85], [0.0, 33.75], [-0.53, 33.97], [-0.75, 34.5], [-0.62, 34.8], [-1.03, 34.97], [-1.25, 35.5]]]]}, "2023-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.5, 36.25], [-0.25, 36.15], [-0.18, 36.18], [-0.03, 36.53], [0.5, 36.75], [0.75, 36.65], [1.0, 36.75], [1.53, 36.53], [1.68, 36.18], [1.75, 36.15], [2.0, 36.25], [2.53, 36.03], [2.68, 35.68], [2.75, 35.65], [3.0, 35.75], [3.53, 35.53], [3.75, 35.0], [3.53, 34.47], [3.0, 34.25], [2.75, 34.35], [2.68, 34.32], [2.53, 33.97], [2.0, 33.75], [1.75, 33.85], [1.5, 33.75], [1.25, 33.85], [1.0, 33.75], [0.75, 33.85], [0.5, 33.75], [0.25, 33.85], [0.0, 33.75], [-0.25, 33.85], [-0.5, 33.75], [-1.03, 33.97], [-1.18, 34.32], [-1.53, 34.47], [-1.75, 35.0], [-1.53, 35.53], [-1.18, 35.68], [-1.03, 36.03], [-0.5, 36.25]]]]}, "2023-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.5, 36.25], [-0.25, 36.15], [-0.18, 36.18], [-0.03, 36.53], [0.5, 36.75], [0.75, 36.65], [1.0, 36.75], [1.53, 36.53], [1.68, 36.18], [1.75, 36.15], [2.0, 36.25], [2.53, 36.03], [2.68, 35.68], [2.75, 35.65], [3.0, 35.75], [3.53, 35.53], [3.75, 35.0], [3.53, 34.47], [3.12, 34.3], [3.25, 34.0], [3.03, 33.47], [2.5, 33.25], [1.97, 33.47], [1.82, 33.82], [1.75, 33.85], [1.5, 33.75], [1.25, 33.85], [1.0, 33.75], [0.75, 33.85], [0.5, 33.75], [0.25, 33.85], [0.0, 33.75], [-0.25, 33.85], [-0.5, 33.75], [-1.03, 33.97], [-1.18, 34.32], [-1.53, 34.47], [-1.75, 35.0], [-1.53, 35.53], [-1.18, 35.68], [-1.03, 36.03], [-0.5, 36.25]]]]}, "2023-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.5, 36.25], [-0.25, 36.15], [-0.18, 36.18], [-0.03, 36.53], [0.5, 36.75], [0.75, 36.65], [1.0, 36.75], [1.53, 36.53], [1.68, 36.18], [1.75, 36.15], [2.0, 36.25], [2.53, 36.03], [2.68, 35.68], [2.75, 35.65], [3.0, 35.75], [3.53, 35.53], [3.75, 35.0], [3.53, 34.47], [3.12, 34.3], [3.25, 34.0], [3.03, 33.47], [2.5, 33.25], [1.97, 33.47], [1.82, 33.82], [1.75, 33.85], [1.5, 33.75], [1.25, 33.85], [1.0, 33.75], [0.75, 33.85], [0.5, 33.75], [0.25, 33.85], [0.0, 33.75], [-0.25, 33.85], [-0.5, 33.75], [-1.03, 33.97], [-1.18, 34.32], [-1.53, 34.47], [-1.75, 35.0], [-1.53, 35.53], [-1.18, 35.68], [-1.03, 36.03], [-0.5, 36.25]]]]}, "2023-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.47, 35.53], [3.0, 35.75], [3.53, 35.53], [3.75, 35.0], [3.53, 34.47], [3.12, 34.3], [3.25, 34.0], [3.03, 33.47], [2.5, 33.25], [1.97, 33.47], [1.75, 34.0], [1.97, 34.53], [2.38, 34.7], [2.25, 35.0], [2.47, 35.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.384129557913468}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.770561329353521}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.375358155065726, 5.714861319341708, 5.732179338110313, 5.459546878640083, 5.313996307519517]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.923971915284767, 3.9482447242012313, 3.6079104447812256, 3.2042320870007757, 5.04905829836008]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.940863392704151, -4.586595462449418, -4.624181246746849, -5.000305241044303, -4.457634317881684]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.384129557913468, 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