{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:05:01.900336", "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": "2016-Apr-19_to_2016-Apr-22_20.5_14.5"}, "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": 2016040000402}, "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": "April 19 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 22 2016"}, "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": 59690.3932411305}, "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": ["Chad"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "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": 14.5}, "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": 20.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "20.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 18.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 21.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.32, 14.68], [19.47, 15.03], [19.82, 15.18], [19.85, 15.25], [19.75, 15.5], [19.96, 16.0], [19.75, 16.5], [19.97, 17.03], [20.32, 17.18], [20.47, 17.53], [21.0, 17.75], [21.53, 17.53], [21.75, 17.0], [21.65, 16.75], [21.68, 16.68], [22.03, 16.53], [22.25, 16.0], [22.03, 15.47], [21.68, 15.32], [21.65, 15.25], [21.75, 15.0], [21.65, 14.75], [21.75, 14.5], [21.53, 13.97], [21.18, 13.82], [21.03, 13.47], [20.68, 13.32], [20.53, 12.97], [20.0, 12.75], [19.75, 12.85], [19.5, 12.75], [19.25, 12.85], [19.0, 12.75], [18.47, 12.97], [18.25, 13.5], [18.47, 14.03], [18.82, 14.18], [18.97, 14.53], [19.32, 14.68]]]]}, "2016-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.32, 14.68], [19.47, 15.03], [19.82, 15.18], [19.85, 15.25], [19.82, 15.32], [19.75, 15.35], [19.5, 15.25], [18.97, 15.47], [18.75, 16.0], [18.97, 16.53], [19.5, 16.75], [19.75, 16.65], [19.82, 16.68], [19.97, 17.03], [20.32, 17.18], [20.47, 17.53], [21.0, 17.75], [21.53, 17.53], [21.75, 17.0], [21.65, 16.75], [21.68, 16.68], [22.03, 16.53], [22.25, 16.0], [22.03, 15.47], [21.68, 15.32], [21.65, 15.25], [21.75, 15.0], [21.65, 14.75], [21.75, 14.5], [21.53, 13.97], [21.18, 13.82], [21.03, 13.47], [20.68, 13.32], [20.53, 12.97], [20.0, 12.75], [19.75, 12.85], [19.5, 12.75], [19.25, 12.85], [19.0, 12.75], [18.47, 12.97], [18.25, 13.5], [18.47, 14.03], [18.82, 14.18], [18.97, 14.53], [19.32, 14.68]]]]}, "2016-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.32, 14.68], [19.47, 15.03], [19.82, 15.18], [19.85, 15.25], [19.82, 15.32], [19.75, 15.35], [19.5, 15.25], [18.97, 15.47], [18.75, 16.0], [18.97, 16.53], [19.5, 16.75], [19.75, 16.65], [19.82, 16.68], [19.97, 17.03], [20.32, 17.18], [20.47, 17.53], [21.0, 17.75], [21.53, 17.53], [21.75, 17.0], [21.65, 16.75], [21.68, 16.68], [22.03, 16.53], [22.25, 16.0], [22.03, 15.47], [21.68, 15.32], [21.65, 15.25], [21.75, 15.0], [21.65, 14.75], [21.75, 14.5], [21.53, 13.97], [21.18, 13.82], [21.03, 13.47], [20.68, 13.32], [20.53, 12.97], [20.0, 12.75], [19.75, 12.85], [19.5, 12.75], [19.25, 12.85], [19.0, 12.75], [18.47, 12.97], [18.25, 13.5], [18.47, 14.03], [18.82, 14.18], [18.97, 14.53], [19.32, 14.68]]]]}, "2016-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, 15.47], [18.75, 16.0], [18.97, 16.53], [19.5, 16.75], [19.75, 16.65], [20.0, 16.75], [20.53, 16.53], [20.75, 16.0], [20.53, 15.47], [20.0, 15.25], [19.75, 15.35], [19.5, 15.25], [18.97, 15.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.63420330036854}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.6309781092714513}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.92261659444773, 30.510565180188678, 30.42392052396798, 30.71709042712223]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.517477915780944, 28.917748479559066, 28.96937114910446, 30.585345072553196]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.208298481028774, -2.7361566116768983, -2.942754670169387, -2.2655441304217163]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.8174201751970713, -3.63420330036854, -3.631587223083784, -2.393163590430561]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4720496005767538, -1.8481326500764037, -2.0703617763032516, -1.3715949805267653]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8423462510402437, -2.2752676123787072, -2.3089815017605457, -1.4231392586181113]}}