{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:51.689380", "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-Mar-18_to_2025-Mar-23_16.0_-25.0"}, "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": 2025030000504}, "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 18 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 23 2025"}, "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": 56360.636628077365}, "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": ["Namibia"]}, "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": -25.0}, "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": 16.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 19.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[17.0, -23.75], [17.25, -23.85], [17.32, -23.82], [17.47, -23.47], [18.0, -23.25], [18.53, -23.47], [18.68, -23.82], [18.75, -23.85], [19.0, -23.75], [19.53, -23.97], [19.75, -24.5], [19.53, -25.03], [19.18, -25.18], [19.03, -25.53], [18.5, -25.75], [18.25, -25.65], [18.0, -25.75], [17.75, -25.65], [17.5, -25.75], [17.25, -25.65], [17.18, -25.68], [17.03, -26.03], [16.5, -26.25], [15.97, -26.03], [15.82, -25.68], [15.47, -25.53], [15.25, -25.0], [15.35, -24.75], [15.25, -24.5], [15.35, -24.25], [15.32, -24.18], [14.97, -24.03], [14.75, -23.5], [14.85, -23.25], [14.75, -23.0], [14.85, -22.75], [14.75, -22.5], [14.97, -21.97], [15.5, -21.75], [15.75, -21.85], [16.0, -21.75], [16.53, -21.97], [16.75, -22.5], [16.54, -23.0], [16.75, -23.5], [16.65, -23.75], [16.68, -23.82], [16.75, -23.85], [17.0, -23.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-03-18T11:30:00.000000000": {"type": 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-22.5], [14.97, -21.97], [15.5, -21.75], [16.03, -21.97], [16.25, -22.5], [16.04, -23.0], [16.25, -23.5], [16.13, -23.8], [16.53, -23.97], [16.75, -24.5], [16.65, -24.75], [16.68, -24.82], [17.03, -24.97], [17.25, -25.5], [17.03, -26.03], [16.5, -26.25], [15.97, -26.03], [15.82, -25.68], [15.47, -25.53], [15.25, -25.0], [15.35, -24.75], [15.25, -24.5], [15.38, -24.2], [14.97, -24.03], [14.75, -23.5], [14.96, -23.0], [14.75, -22.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.831465934801827}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7040205899699123}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.514129469129784, 21.415890539260147, 21.207312266031977, 21.19875055948893, 21.055346284089296, 20.48865712483729]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.319210306803427, 19.486778513590536, 19.359619394938193, 19.433174387613974, 19.645605977376306, 18.722006734212243]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.064415874697953, -3.7154973593819016, -3.726766386169186, -3.545286598753315, -3.424028628127423, -3.6961412724382283]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.831465934801827, -4.54811184998573, -4.564451228725829, -4.098861322960147, -3.699490548486267, -4.170619732843875]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7110448172871964, -1.576178347283832, -1.5721216003951142, -1.4549656356304503, -1.4453062975126805, -1.5344794895394145]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0984738086832104, -1.9028587731448605, -2.0670368742731724, -1.790697788321129, -1.6063151908312638, -1.781682528621909]}}