{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:22:23.960823", "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": "2020-Dec-08_to_2020-Dec-14_47.5_-21.5"}, "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": 2020120000324}, "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": "December 08 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 14 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 110403.62498739976}, "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": -21.5}, "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": 47.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "47.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 46.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 49.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -16.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.85, -22.75], [45.75, -22.5], [45.97, -21.97], [46.5, -21.75], [46.75, -21.85], [46.82, -21.82], [46.85, -21.75], [46.75, -21.5], [46.85, -21.25], [46.75, -21.0], [46.97, -20.47], [47.32, -20.32], [47.35, -20.25], [47.25, -20.0], [47.47, -19.47], [48.0, -19.25], [48.25, -19.35], [48.5, -19.25], [49.03, -19.47], [49.25, -20.0], [49.03, -20.53], [48.68, -20.68], [48.65, -20.75], [48.75, -21.0], [48.65, -21.25], [48.75, -21.5], [48.65, -21.75], [48.75, -22.0], [48.53, -22.53], [48.18, -22.68], [48.15, -22.75], [48.25, -23.0], [48.03, -23.53], [47.68, -23.68], [47.53, -24.03], [47.0, -24.25], [46.75, -24.15], [46.5, -24.25], [45.97, -24.03], [45.75, -23.5], [45.85, -23.25], [45.75, -23.0], [45.85, -22.75]]]]}, "2020-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.85, -22.75], [45.75, -22.5], [45.97, -21.97], [46.5, -21.75], [46.75, -21.85], [46.82, -21.82], [46.85, -21.75], [46.75, -21.5], [46.85, -21.25], [46.75, -21.0], [46.97, -20.47], [47.32, -20.32], [47.35, -20.25], [47.25, -20.0], [47.46, -19.5], [47.25, -19.0], [47.35, -18.75], [47.25, -18.5], [47.35, -18.25], [47.25, -18.0], [47.47, -17.47], [48.0, -17.25], [48.25, -17.35], [48.5, -17.25], [49.03, -17.47], [49.18, -17.82], [49.53, -17.97], [49.75, -18.5], [49.65, -18.75], [49.75, -19.0], [49.53, -19.53], [49.18, -19.68], [49.15, -19.75], [49.25, -20.0], [49.03, -20.53], [48.68, -20.68], [48.65, -20.75], [48.75, -21.0], [48.65, -21.25], [48.75, -21.5], [48.65, -21.75], [48.75, -22.0], [48.53, -22.53], [48.18, -22.68], [48.15, -22.75], [48.25, -23.0], [48.03, -23.53], [47.68, -23.68], [47.53, -24.03], [47.0, -24.25], [46.75, -24.15], [46.5, -24.25], [45.97, -24.03], [45.75, -23.5], [45.85, -23.25], [45.75, -23.0], [45.85, -22.75]]]]}, "2020-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.85, -22.75], [45.75, -22.5], [45.97, -21.97], [46.5, -21.75], [46.75, -21.85], [46.82, -21.82], [46.85, -21.75], [46.75, -21.5], [46.85, -21.25], [46.75, -21.0], [46.97, -20.47], [47.32, -20.32], [47.35, -20.25], [47.25, -20.0], [47.46, -19.5], [47.32, -19.18], [46.97, -19.03], [46.75, -18.5], [46.85, -18.25], [46.75, -18.0], [46.85, -17.75], [46.75, -17.5], [46.97, -16.97], [47.5, -16.75], [47.75, -16.85], [48.0, -16.75], [48.25, -16.85], [48.5, -16.75], [49.03, -16.97], [49.18, -17.32], [49.53, -17.47], [49.75, -18.0], [49.65, -18.25], [49.75, -18.5], [49.65, -18.75], [49.75, -19.0], [49.53, -19.53], [49.18, -19.68], [49.15, -19.75], [49.25, -20.0], [49.03, -20.53], [48.68, -20.68], [48.65, -20.75], [48.75, -21.0], [48.65, -21.25], [48.75, -21.5], [48.65, -21.75], [48.75, -22.0], [48.53, -22.53], [48.18, -22.68], [48.15, -22.75], [48.25, -23.0], [48.03, -23.53], [47.68, -23.68], [47.53, -24.03], [47.0, -24.25], [46.75, -24.15], [46.5, -24.25], [45.97, -24.03], [45.75, -23.5], [45.85, -23.25], [45.75, -23.0], [45.85, -22.75]]]]}, "2020-12-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.85, -18.25], [46.75, -18.0], [46.85, -17.75], [46.75, -17.5], [46.97, -16.97], [47.32, -16.82], [47.47, -16.47], [47.82, -16.32], [47.97, -15.97], [48.5, -15.75], [49.03, -15.97], [49.25, -16.5], [49.15, -16.75], [49.18, -16.82], [49.53, -16.97], [49.75, -17.5], [49.65, -17.75], [49.75, -18.0], [49.65, -18.25], [49.75, -18.5], [49.65, -18.75], [49.75, -19.0], [49.53, -19.53], [49.18, -19.68], [49.15, -19.75], [49.25, -20.0], [49.03, -20.53], [48.68, -20.68], [48.53, -21.03], [48.13, -21.2], [48.25, -21.5], [48.03, -22.03], [47.5, -22.25], [46.97, -22.03], [46.75, -21.5], [46.97, -20.97], [47.38, -20.8], [47.25, -20.5], [47.35, -20.25], [47.25, -20.0], [47.35, -19.75], [47.32, -19.68], [46.97, -19.53], [46.75, -19.0], [46.85, -18.75], [46.75, -18.5], [46.85, -18.25]]]]}, "2020-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.85, -18.25], [46.75, -18.0], [46.85, -17.75], [46.75, -17.5], [46.97, -16.97], [47.32, -16.82], [47.47, -16.47], [47.82, -16.32], [47.97, -15.97], [48.5, -15.75], [49.03, -15.97], [49.25, -16.5], [49.15, -16.75], [49.18, -16.82], [49.53, -16.97], [49.75, -17.5], [49.65, -17.75], [49.75, -18.0], [49.65, -18.25], [49.75, -18.5], [49.65, -18.75], [49.75, -19.0], [49.53, -19.53], [49.18, -19.68], [49.15, -19.75], [49.25, -20.0], [49.03, -20.53], [48.68, -20.68], [48.53, -21.03], [48.13, -21.2], [48.25, -21.5], [48.03, -22.03], [47.5, -22.25], [46.97, -22.03], [46.75, -21.5], [46.97, -20.97], [47.38, -20.8], [47.25, -20.5], [47.35, -20.25], [47.25, -20.0], [47.35, -19.75], [47.32, -19.68], [46.97, -19.53], [46.75, -19.0], [46.85, -18.75], [46.75, -18.5], [46.85, -18.25]]]]}, "2020-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.85, -18.25], [46.75, -18.0], [46.97, -17.47], [47.32, -17.32], [47.35, -17.25], [47.25, -17.0], [47.47, -16.47], [47.82, -16.32], [47.97, -15.97], [48.5, -15.75], [49.03, -15.97], [49.25, -16.5], [49.15, -16.75], [49.18, -16.82], [49.53, -16.97], [49.75, -17.5], [49.65, -17.75], [49.75, -18.0], [49.65, -18.25], [49.75, -18.5], [49.53, -19.03], [49.18, -19.18], [49.15, -19.25], [49.25, -19.5], [49.15, -19.75], [49.25, -20.0], [49.03, -20.53], [48.68, -20.68], [48.53, -21.03], [48.13, -21.2], [48.25, -21.5], [48.03, -22.03], [47.5, -22.25], [46.97, -22.03], [46.75, -21.5], [46.97, -20.97], [47.38, -20.8], [47.25, -20.5], [47.35, -20.25], [47.25, -20.0], [47.35, -19.75], [47.32, -19.68], [46.97, -19.53], [46.75, -19.0], [46.85, -18.75], [46.75, -18.5], [46.85, -18.25]]]]}, "2020-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.97, -22.03], [46.75, -21.5], [46.97, -20.97], [47.5, -20.75], [48.03, -20.97], [48.25, -21.5], [48.03, -22.03], [47.5, -22.25], [46.97, -22.03]]], [[[47.47, -20.03], [47.25, -19.5], [47.47, -18.97], [48.0, -18.75], [48.53, -18.97], [48.75, -19.5], [48.53, -20.03], [48.0, -20.25], [47.47, -20.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.045136836582628}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.53189983643158}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.999256332157984, 19.71300901440918, 20.96745095720769, 20.478755786405202, 20.398624082544984, 20.495480335263665, 19.694763695026722]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.08249169067949, 15.622656453167565, 18.289945702996704, 18.329106014282218, 18.408623386603665, 18.46706466609419, 19.07175572066302]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3547561693431107, -3.4244533836488813, -2.165375372756115, -2.2227346966653316, -2.33008253125515, -2.040780961553881, -1.8339639345431067]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.507490738368119, -5.045136836582628, -3.1471053874305426, -2.717364203259308, -2.9325472976398146, -2.5281822870824726, -1.83683119957999]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.4367435257969317, -2.5631838469941988, -1.7174605773261038, -1.8770109977648923, -1.9693132221580152, -1.677061972208026, -1.4174905914278575]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.071295882868108, -3.465943442232981, -2.556664734031384, -2.4430904040035806, -2.647546538781607, -2.0198238661263686, -1.4628949767633697]}}