{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:30:40.601231", "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": "2022-Apr-28_to_2022-May-03_44.0_-24.0"}, "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": 2022040000915}, "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 28 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 03 2022"}, "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": 56827.09651297152}, "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": ["Madagascar"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "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": -24.0}, "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": 44.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "44.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 43.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 46.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.47, -22.97], [44.0, -22.75], [44.53, -22.97], [44.68, -23.32], [44.8, -23.37], [44.85, -23.25], [44.75, -23.0], [44.85, -22.75], [44.82, -22.68], [44.47, -22.53], [44.25, -22.0], [44.47, -21.47], [45.0, -21.25], [45.25, -21.35], [45.5, -21.25], [45.75, -21.35], [46.0, -21.25], [46.25, -21.35], [46.5, -21.25], [47.03, -21.47], [47.25, -22.0], [47.15, -22.25], [47.25, -22.5], [47.15, -22.75], [47.25, -23.0], [47.15, -23.25], [47.25, -23.5], [47.03, -24.03], [46.5, -24.25], [46.25, -24.15], [46.0, -24.25], [45.75, -24.15], [45.5, -24.25], [45.2, -24.12], [45.03, -24.53], [44.5, -24.75], [44.25, -24.65], [44.0, -24.75], [43.47, -24.53], [43.25, -24.0], [43.35, -23.75], [43.25, -23.5], [43.47, -22.97]]]]}, "2022-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.47, -22.97], [44.0, -22.75], [44.53, -22.97], [44.68, -23.32], [44.8, -23.37], [44.85, -23.25], [44.75, -23.0], [44.85, -22.75], [44.82, -22.68], [44.47, -22.53], [44.25, -22.0], [44.47, -21.47], [45.0, -21.25], [45.25, -21.35], [45.5, -21.25], [45.75, -21.35], [46.0, -21.25], [46.25, -21.35], [46.5, -21.25], [47.03, -21.47], [47.25, -22.0], [47.15, -22.25], [47.25, -22.5], [47.15, -22.75], [47.25, -23.0], [47.15, -23.25], [47.25, -23.5], [47.03, -24.03], [46.5, -24.25], [46.25, -24.15], [46.0, -24.25], [45.75, -24.15], [45.5, -24.25], [45.2, -24.12], [45.03, -24.53], [44.5, -24.75], [44.25, -24.65], [44.0, -24.75], [43.47, -24.53], [43.25, -24.0], [43.35, -23.75], [43.25, -23.5], [43.47, -22.97]]]]}, "2022-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.47, -22.97], [44.0, -22.75], [44.53, -22.97], [44.68, -23.32], [44.8, -23.37], [44.85, -23.25], [44.75, -23.0], [44.85, -22.75], [44.82, -22.68], [44.47, -22.53], [44.25, -22.0], [44.47, -21.47], [45.0, -21.25], [45.25, -21.35], [45.5, -21.25], [45.75, -21.35], [46.0, -21.25], [46.25, -21.35], [46.5, -21.25], [47.03, -21.47], [47.25, -22.0], [47.15, -22.25], [47.25, -22.5], [47.15, -22.75], [47.25, -23.0], [47.15, -23.25], [47.25, -23.5], [47.03, -24.03], [46.5, -24.25], [46.25, -24.15], [46.0, -24.25], [45.75, -24.15], [45.5, -24.25], [45.2, -24.12], [45.03, -24.53], [44.5, -24.75], [44.25, -24.65], [44.0, -24.75], [43.47, -24.53], [43.25, -24.0], [43.35, -23.75], [43.25, -23.5], [43.47, -22.97]]]]}, "2022-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.0, -22.75], [44.53, -22.97], [44.68, -23.32], [44.75, -23.35], [44.82, -23.32], [44.97, -22.97], [45.5, -22.75], [45.75, -22.85], [46.0, -22.75], [46.53, -22.97], [46.75, -23.5], [46.53, -24.03], [46.18, -24.18], [46.03, -24.53], [45.68, -24.68], [45.53, -25.03], [45.0, -25.25], [44.75, -25.15], [44.5, -25.25], [43.97, -25.03], [43.82, -24.68], [43.47, -24.53], [43.25, -24.0], [43.35, -23.75], [43.25, -23.5], [43.47, -22.97], [44.0, -22.75]]], [[[44.47, -22.53], [44.25, -22.0], [44.47, -21.47], [45.0, -21.25], [45.25, -21.35], [45.5, -21.25], [46.03, -21.47], [46.25, -22.0], [46.03, -22.53], [45.5, -22.75], [45.25, -22.65], [45.0, -22.75], [44.47, -22.53]]]]}, "2022-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.47, -22.97], [44.0, -22.75], [44.53, -22.97], [44.68, -23.32], [44.75, -23.35], [44.82, -23.32], [44.97, -22.97], [45.5, -22.75], [45.75, -22.85], [46.0, -22.75], [46.53, -22.97], [46.75, -23.5], [46.53, -24.03], [46.18, -24.18], [46.03, -24.53], [45.68, -24.68], [45.53, -25.03], [45.0, -25.25], [44.75, -25.15], [44.5, -25.25], [43.97, -25.03], [43.82, -24.68], [43.47, -24.53], [43.25, -24.0], [43.35, -23.75], [43.25, -23.5], [43.47, -22.97]]]]}, "2022-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.25, -24.0], [43.47, -23.47], [44.0, -23.25], [44.25, -23.35], [44.5, -23.25], [44.75, -23.35], [45.0, -23.25], [45.25, -23.35], [45.5, -23.25], [46.03, -23.47], [46.25, -24.0], [46.03, -24.53], [45.68, -24.68], [45.53, -25.03], [45.0, -25.25], [44.75, -25.15], [44.5, -25.25], [43.97, -25.03], [43.82, -24.68], [43.47, -24.53], [43.25, -24.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.426261183975555}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.857781396583772}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.39005400254632, 18.54885441055967, 18.348167351054144, 20.380480196214194, 19.996458553157197, 20.257567597209743]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.007239806280438, 14.054639082700191, 15.020918648551913, 17.985988533510465, 17.645629226172844, 18.788166499777674]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.142680729369058, -2.8815787998341342, -2.97726588913142, -2.5562348880281434, -2.679543641353127, -2.536156685559604]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.426261183975555, -3.7874019766258584, -3.537050800087968, -3.134012953159356, -3.021631161602727, -2.7499284655853558]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0278267595825508, -1.8594904352725838, -1.9443989753308464, -1.520392087028731, -1.538650857552051, -1.4044248964740749]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5104082885908294, -2.3242429006562872, -2.5852784858901945, -1.8053098899222784, -1.7844830319286622, -1.6306909426090344]}}