{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:38.310677", "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-Mar-11_to_2022-Mar-17_49.5_-13.0"}, "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": 2022030000405}, "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": "March 11 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 17 2022"}, "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": 63316.92580599947}, "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"]}, "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": ["Indian Ocean"]}, "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": -13.0}, "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": 49.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "49.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 47.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 51.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -14.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -12.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[48.35, -13.25], [48.32, -13.18], [48.25, -13.15], [48.0, -13.25], [47.75, -13.15], [47.5, -13.25], [46.97, -13.03], [46.75, -12.5], [46.97, -11.97], [47.5, -11.75], [47.75, -11.85], [47.82, -11.82], [47.97, -11.47], [48.5, -11.25], [48.75, -11.35], [49.0, -11.25], [49.25, -11.35], [49.5, -11.25], [49.75, -11.35], [50.0, -11.25], [50.25, -11.35], [50.5, -11.25], [50.75, -11.35], [51.0, -11.25], [51.53, -11.47], [51.75, -12.0], [51.53, -12.53], [51.18, -12.68], [51.03, -13.03], [50.68, -13.18], [50.65, -13.25], [50.75, -13.5], [50.65, -13.75], [50.75, -14.0], [50.53, -14.53], [50.0, -14.75], [49.5, -14.54], [49.0, -14.75], [48.47, -14.53], [48.25, -14.0], [48.35, -13.75], [48.25, -13.5], [48.35, -13.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.25, -13.0], [48.47, -12.47], [49.0, -12.25], [49.53, -12.47], [49.75, -13.0], [49.65, -13.25], [49.75, -13.5], [49.53, -14.03], [49.0, -14.25], [48.47, -14.03], [48.25, -13.5], [48.35, -13.25], [48.25, -13.0]]]]}, "2022-03-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.25, -13.0], [48.35, -12.75], [48.25, -12.5], [48.47, -11.97], [49.0, -11.75], [49.25, -11.85], [49.5, -11.75], [49.8, -11.87], [49.97, -11.47], [50.5, -11.25], [50.75, -11.35], [51.0, -11.25], [51.53, -11.47], [51.75, -12.0], [51.53, -12.53], [51.18, -12.68], [51.03, -13.03], [50.68, -13.18], [50.65, -13.25], [50.75, -13.5], [50.65, -13.75], [50.75, -14.0], [50.53, -14.53], [50.0, -14.75], [49.47, -14.53], [49.32, -14.18], [49.25, -14.15], [49.0, -14.25], [48.47, -14.03], [48.25, -13.5], [48.35, -13.25], [48.25, -13.0]]]]}, "2022-03-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.25, -13.5], [48.35, -13.25], [48.25, -13.0], [48.35, -12.75], [48.25, -12.5], [48.47, -11.97], [48.82, -11.82], [48.97, -11.47], [49.5, -11.25], [49.75, -11.35], [50.0, -11.25], [50.25, -11.35], [50.5, -11.25], [50.75, -11.35], [51.0, -11.25], [51.53, -11.47], [51.75, -12.0], [51.53, -12.53], [51.18, -12.68], [51.03, -13.03], [50.68, -13.18], [50.65, -13.25], [50.75, -13.5], [50.65, -13.75], [50.75, -14.0], [50.53, -14.53], [50.0, -14.75], [49.5, -14.54], [49.0, -14.75], [48.47, -14.53], [48.25, -14.0], [48.35, -13.75], [48.25, -13.5]]]]}, "2022-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.5, -13.25], [46.97, -13.03], [46.75, -12.5], [46.97, -11.97], [47.5, -11.75], [47.75, -11.85], [47.82, -11.82], [47.97, -11.47], [48.5, -11.25], [48.75, -11.35], [49.0, -11.25], [49.25, -11.35], [49.5, -11.25], [49.75, -11.35], [50.0, -11.25], [50.25, -11.35], [50.5, -11.25], [50.75, -11.35], [51.0, -11.25], [51.53, -11.47], [51.75, -12.0], [51.53, -12.53], [51.18, -12.68], [51.03, -13.03], [50.68, -13.18], [50.65, -13.25], [50.75, -13.5], [50.65, -13.75], [50.75, -14.0], [50.53, -14.53], [50.0, -14.75], [49.5, -14.54], [49.0, 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"2022-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.5, -13.25], [46.97, -13.03], [46.75, -12.5], [46.97, -11.97], [47.5, -11.75], [47.75, -11.85], [47.82, -11.82], [47.97, -11.47], [48.5, -11.25], [48.75, -11.35], [49.0, -11.25], [49.53, -11.47], [49.75, -12.0], [49.65, -12.25], [49.68, -12.32], [50.03, -12.47], [50.25, -13.0], [50.03, -13.53], [49.68, -13.68], [49.53, -14.03], [49.0, -14.25], [48.47, -14.03], [48.25, -13.5], [48.35, -13.25], [48.32, -13.18], [48.25, -13.15], [48.0, -13.25], [47.75, -13.15], [47.5, -13.25]]]]}, "2022-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.25, -12.5], [48.47, -11.97], [49.0, -11.75], [49.53, -11.97], [49.68, -12.32], [50.03, -12.47], [50.25, -13.0], [50.03, -13.53], [49.5, -13.75], [49.25, -13.65], [49.0, -13.75], [48.47, -13.53], [48.25, -13.0], [48.35, -12.75], [48.25, -12.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.7276097491362066}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2236515440968145}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.669172755077852, 24.9219316614155, 24.439435083842966, 24.75599150004541, 24.873055388543378, 25.423573657256156, 24.95157049126226]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.71715614037072, 21.796475317516013, 18.6323039134478, 18.165254268665933, 18.526634019491837, 23.97709843625063, 24.576764503354013]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.0590856666401862, -1.085800308009965, -1.3089752891698332, -1.3232517874369105, -1.2072250387582162, -1.1361273746138068, -1.110063442131074]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.1354450070325015, -1.5748983891785997, -2.7276097491362066, -2.162115847979294, -2.1898165535110934, -1.3680559652476063, -1.1469777335187246]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3790838267264558, -1.604095269091534, -1.9469118478405087, -2.0525775149601415, -1.8528293246985765, -1.9447662570480968, -1.6233118534852533]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5077288818262875, -2.2384887118623085, -3.7608087369347794, -2.9987122638145123, -3.0533425121677813, -2.5679881131980116, -1.6771532314371083]}}