{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:38.183002", "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-14_37.0_-15.0"}, "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": 2022030000404}, "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 14 2022"}, "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": 74214.16012339658}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": -15.0}, "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": 37.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "37.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 35.5}, "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": -17.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -14.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[38.68, -16.32], [39.03, -16.47], [39.25, -17.0], [39.03, -17.53], [38.5, -17.75], [38.25, -17.65], [38.0, -17.75], [37.75, 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"description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.25, -15.5], [35.35, -15.25], [35.25, -15.0], [35.47, -14.47], [36.0, -14.25], [36.25, -14.35], [36.5, -14.25], [36.75, -14.35], [36.82, -14.32], [36.97, -13.97], [37.5, -13.75], [38.03, -13.97], [38.18, -14.32], [38.53, -14.47], [38.75, -15.0], [38.53, -15.53], [38.0, -15.75], [38.53, -15.97], [38.68, -16.32], [39.03, -16.47], [39.25, -17.0], [39.03, -17.53], [38.5, -17.75], [38.25, -17.65], [38.0, -17.75], [37.75, -17.65], [37.5, -17.75], [37.25, -17.65], [37.0, -17.75], [36.47, -17.53], [36.32, -17.18], [35.97, -17.03], [35.82, -16.68], [35.47, -16.53], [35.25, -16.0], [35.35, -15.75], [35.25, -15.5]], [[37.75, -15.65], [37.5, -15.75], [37.75, -15.85], [38.0, -15.75], [37.75, -15.65]], [[37.25, -15.65], [37.18, -15.68], [37.15, -15.75], [37.18, -15.82], [37.25, -15.85], [37.5, -15.75], [37.25, -15.65]]]]}, 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[37.5, -15.75], [37.25, -15.65]]]]}, "2022-03-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.75, -16.5], [34.97, -15.97], [35.32, -15.82], [35.35, -15.75], [35.32, -15.68], [34.97, -15.53], [34.75, -15.0], [34.97, -14.47], [35.5, -14.25], [35.75, -14.35], [36.0, -14.25], [36.25, -14.35], [36.5, -14.25], [36.75, -14.35], [36.82, -14.32], [36.97, -13.97], [37.5, -13.75], [38.03, -13.97], [38.18, -14.32], [38.53, -14.47], [38.75, -15.0], [38.53, -15.53], [38.0, -15.75], [38.53, -15.97], [38.68, -16.32], [39.03, -16.47], [39.25, -17.0], [39.03, -17.53], [38.5, -17.75], [38.25, -17.65], [38.0, -17.75], [37.75, -17.65], [37.68, -17.68], [37.53, -18.03], [37.0, -18.25], [36.75, -18.15], [36.5, -18.25], [35.97, -18.03], [35.82, -17.68], [35.75, -17.65], [35.5, -17.75], [34.97, -17.53], [34.75, -17.0], [34.85, -16.75], [34.75, -16.5]], [[37.75, -15.65], [37.5, -15.75], [37.75, -15.85], [38.0, -15.75], [37.75, -15.65]], [[37.25, -15.65], [37.18, -15.68], [37.15, -15.75], [37.18, -15.82], [37.25, -15.85], [37.5, -15.75], [37.25, -15.65]]]]}, "2022-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.97, -15.97], [35.5, -15.75], [36.03, -15.97], [36.18, -16.32], [36.25, -16.35], [36.5, -16.25], [36.75, -16.35], [37.0, -16.25], [37.25, -16.35], [37.32, -16.32], [37.47, -15.97], [38.0, -15.75], [38.53, -15.97], [38.68, -16.32], [39.03, -16.47], [39.25, -17.0], [39.03, -17.53], [38.5, -17.75], [38.25, -17.65], [38.0, -17.75], [37.75, -17.65], [37.68, -17.68], [37.53, -18.03], [37.0, -18.25], [36.75, -18.15], [36.5, -18.25], [35.97, -18.03], [35.82, -17.68], [35.75, -17.65], [35.5, -17.75], [34.97, -17.53], [34.75, -17.0], [34.85, -16.75], [34.75, -16.5], [34.97, -15.97]]], [[[34.97, -14.47], [35.5, -14.25], [36.03, -14.47], [36.25, -15.0], [36.03, -15.53], [35.5, -15.75], [34.97, -15.53], [34.75, -15.0], [34.97, -14.47]]], [[[37.53, -14.47], [37.75, -15.0], [37.53, -15.53], [37.0, -15.75], [36.47, -15.53], [36.25, -15.0], [36.47, -14.47], [37.0, -14.25], [37.53, -14.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.8394368738261164}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0681011639091356}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.281618639066778, 22.722981611495356, 23.147416238695996, 24.093767245429603]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.673679788745005, 20.92868423911301, 21.860244065270592, 22.21485191367998]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.421836743534919, -2.272111869463083, -1.8486051653124174, -1.6080928479710705]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1725088783645106, -2.9910638879951534, -3.8394368738261164, -2.4775283465959888]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0705592167800866, -1.9285939227420477, -1.5584080130384004, -1.4117971149462591]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.1751749051051337, -3.157571044596232, -2.2063591356590204, -1.7426468523357908]}}