{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:53.082533", "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-Jun-25_to_2023-Jun-28_37.5_-12.5"}, "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": 2023060000918}, "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": "June 25 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 28 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 96234.13506664478}, "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": ["Malawi", "Mozambique", "Tanzania, United Republic of"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "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": -12.5}, "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": 37.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "37.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 35.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 38.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -15.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -11.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[34.82, -13.82], [34.97, -13.47], [35.32, -13.32], [35.47, -12.97], [35.82, -12.82], [35.97, -12.47], [36.38, -12.3], [36.25, -12.0], [36.35, -11.75], [36.25, -11.5], [36.47, -10.97], [37.0, -10.75], [37.25, -10.85], [37.32, -10.82], [37.47, -10.47], [38.0, -10.25], [38.53, -10.47], [38.75, -11.0], [38.65, -11.25], [38.68, -11.32], [39.03, -11.47], [39.25, -12.0], [39.15, -12.25], [39.25, -12.5], [39.15, -12.75], [39.25, -13.0], [39.03, -13.53], [38.68, -13.68], [38.53, -14.03], [38.13, -14.2], [38.25, -14.5], [38.15, -14.75], [38.25, -15.0], [38.03, -15.53], [37.5, -15.75], [37.0, -15.54], [36.68, -15.68], [36.53, -16.03], [36.0, -16.25], [35.47, -16.03], [35.32, -15.68], [34.97, -15.53], [34.82, -15.18], [34.47, -15.03], [34.25, -14.5], [34.47, -13.97], [34.82, -13.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.47, -15.03], [34.25, -14.5], [34.47, -13.97], [34.82, -13.82], [34.97, -13.47], [35.32, -13.32], [35.47, -12.97], [35.82, -12.82], [35.97, -12.47], [36.38, -12.3], [36.25, -12.0], [36.35, -11.75], [36.25, -11.5], [36.47, -10.97], [37.0, -10.75], [37.25, -10.85], [37.5, -10.75], [37.75, -10.85], [38.0, -10.75], [38.53, -10.97], [38.68, -11.32], [39.03, -11.47], [39.25, -12.0], [39.15, -12.25], [39.25, -12.5], [39.15, -12.75], [39.25, -13.0], [39.03, -13.53], [38.68, -13.68], [38.53, -14.03], [38.13, -14.2], [38.25, -14.5], [38.15, -14.75], [38.25, -15.0], [38.03, -15.53], [37.5, -15.75], [37.0, -15.54], [36.68, -15.68], [36.53, -16.03], [36.0, -16.25], [35.47, -16.03], [35.32, -15.68], [34.97, -15.53], [34.82, -15.18], [34.47, -15.03]]]]}, "2023-06-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.47, -15.03], [34.25, -14.5], [34.47, -13.97], [34.82, -13.82], [34.97, -13.47], [35.32, -13.32], [35.47, -12.97], [35.82, -12.82], [35.97, -12.47], [36.38, -12.3], [36.25, -12.0], [36.35, -11.75], [36.25, -11.5], [36.47, -10.97], [37.0, -10.75], [37.25, -10.85], [37.32, -10.82], [37.47, -10.47], [38.0, -10.25], [38.53, -10.47], [38.75, -11.0], [38.65, -11.25], [38.68, -11.32], [39.03, -11.47], [39.25, -12.0], [39.15, -12.25], [39.25, -12.5], [39.15, -12.75], [39.25, -13.0], [39.03, -13.53], [38.68, -13.68], [38.53, -14.03], [38.13, -14.2], [38.25, -14.5], [38.15, -14.75], [38.25, -15.0], [38.03, -15.53], [37.5, -15.75], [37.0, -15.54], [36.68, -15.68], [36.53, -16.03], [36.0, -16.25], [35.47, -16.03], [35.32, -15.68], [34.97, -15.53], [34.82, -15.18], [34.47, -15.03]]]]}, "2023-06-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.47, -15.03], [34.25, -14.5], [34.47, -13.97], [34.82, -13.82], [34.97, -13.47], [35.32, -13.32], [35.47, -12.97], [35.82, -12.82], [35.97, -12.47], [36.38, -12.3], [36.25, -12.0], [36.35, -11.75], [36.25, -11.5], [36.47, -10.97], [37.0, -10.75], [37.25, -10.85], [37.32, -10.82], 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duration", "value": -3.065013003825925}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9348285449121732}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.94021750854182, 19.07468100893226, 19.043855383356913, 21.47088730396615]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.52080634358424, 15.870844860879288, 15.770096069835859, 21.16126306981539]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9937180827496084, -1.923723000395535, -1.9145488686878824, -1.5242042402867924]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.065013003825925, -2.2724691260534087, -2.428916526713806, -1.5540098344106354]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.793421257636912, -1.7078310666954954, -1.6566875941014807, -1.4382812958382671]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4786985446899172, -2.2126384686081932, -2.2443543915217408, -1.4585250065924955]}}