{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:19:08.028209", "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-Mar-11_to_2020-Mar-13_15.0_28.0"}, "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": 2020030000334}, "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 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 13 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 125089.74460548698}, "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": ["Libya", "Niger"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 28.0}, "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": 15.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "15.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 12.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 17.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 22.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 28.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-03-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.96, 24.0], [11.75, 24.5], [11.97, 25.03], [12.5, 25.25], 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24.5], [11.97, 25.03], [12.5, 25.25], [12.75, 25.15], [12.82, 25.18], [12.85, 25.25], [12.75, 25.5], [12.85, 25.75], [12.75, 26.0], [12.97, 26.53], [13.5, 26.75], [13.75, 26.65], [14.0, 26.75], [14.25, 26.65], [14.32, 26.68], [14.46, 27.0], [14.25, 27.5], [14.35, 27.75], [14.25, 28.0], [14.35, 28.25], [14.25, 28.5], [14.47, 29.03], [15.0, 29.25], [15.25, 29.15], [15.5, 29.25], [16.03, 29.03], [16.18, 28.68], [16.53, 28.53], [16.68, 28.18], [17.03, 28.03], [17.18, 27.68], [17.53, 27.53], [17.75, 27.0], [17.65, 26.75], [17.75, 26.5], [17.53, 25.97], [17.18, 25.82], [17.03, 25.47], [16.68, 25.32], [16.53, 24.97], [16.0, 24.75], [15.75, 24.85], [15.68, 24.82], [15.53, 24.47], [15.18, 24.32], [15.03, 23.97], [14.68, 23.82], [14.53, 23.47], [14.0, 23.25], [13.75, 23.35], [13.68, 23.32], [13.53, 22.97], [13.18, 22.82], [13.03, 22.47], [12.5, 22.25], [11.97, 22.47], [11.75, 23.0], [11.85, 23.25], [11.75, 23.5], [11.96, 24.0]]]]}, "2020-03-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.96, 24.0], [11.75, 24.5], [11.97, 25.03], [12.5, 25.25], [12.75, 25.15], [12.82, 25.18], [12.85, 25.25], [12.75, 25.5], [12.85, 25.75], [12.75, 26.0], [12.97, 26.53], [13.5, 26.75], [13.75, 26.65], [14.0, 26.75], [14.25, 26.65], [14.32, 26.68], [14.46, 27.0], [14.25, 27.5], [14.35, 27.75], [14.25, 28.0], [14.35, 28.25], [14.25, 28.5], [14.47, 29.03], [15.0, 29.25], [15.25, 29.15], [15.5, 29.25], [16.03, 29.03], [16.18, 28.68], [16.53, 28.53], [16.68, 28.18], [17.03, 28.03], [17.18, 27.68], [17.53, 27.53], [17.75, 27.0], [17.65, 26.75], [17.75, 26.5], [17.53, 25.97], [17.18, 25.82], [17.03, 25.47], [16.68, 25.32], [16.53, 24.97], [16.0, 24.75], [15.75, 24.85], [15.68, 24.82], [15.53, 24.47], [15.18, 24.32], [15.03, 23.97], [14.68, 23.82], [14.53, 23.47], [14.0, 23.25], [13.75, 23.35], [13.68, 23.32], [13.53, 22.97], [13.18, 22.82], [13.03, 22.47], [12.5, 22.25], [11.97, 22.47], [11.75, 23.0], [11.85, 23.25], [11.75, 23.5], [11.96, 24.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.191180550065326}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.7308721676997925}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.496049541102423, 12.053909317462171, 12.795209507836717]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.51520245277186, 10.559296045055078, 11.004985527929705]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.304313408381024, -5.7734064105026155, -5.1148966842157275]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.191180550065326, -6.986523101901355, 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