{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:39.658119", "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": "2018-May-10_to_2018-May-12_7.0_10.0"}, "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": 2018050000499}, "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": "May 10 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 12 2018"}, "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": 79216.43162234133}, "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": ["Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "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": 10.0}, "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": 7.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "7.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 3.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 8.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 8.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 11.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-05-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.25, 9.5], [3.35, 9.75], [3.25, 10.0], [3.47, 10.53], [4.0, 10.75], [4.5, 10.54], [5.0, 10.75], [5.25, 10.65], [5.5, 10.75], [5.75, 10.65], [5.82, 10.68], [5.85, 10.75], [5.75, 11.0], [5.97, 11.53], [6.5, 11.75], [7.03, 11.53], [7.18, 11.18], [7.25, 11.15], [7.5, 11.25], [8.03, 11.03], [8.18, 10.68], [8.25, 10.65], [8.5, 10.75], [9.03, 10.53], [9.25, 10.0], [9.03, 9.47], [8.5, 9.25], [8.25, 9.35], [8.0, 9.25], [7.75, 9.35], [7.68, 9.32], [7.53, 8.97], [7.0, 8.75], [6.75, 8.85], [6.5, 8.75], [6.25, 8.85], [6.18, 8.82], [6.03, 8.47], [5.5, 8.25], [5.25, 8.35], [5.18, 8.32], [5.03, 7.97], [4.5, 7.75], [4.0, 7.96], [3.5, 7.75], [2.97, 7.97], [2.75, 8.5], [2.97, 9.03], [3.32, 9.18], [3.35, 9.25], [3.25, 9.5]]]]}, "2018-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.25, 9.5], [3.35, 9.75], [3.25, 10.0], [3.47, 10.53], [4.0, 10.75], [4.5, 10.54], [5.0, 10.75], [5.25, 10.65], [5.5, 10.75], [5.75, 10.65], [5.82, 10.68], [5.85, 10.75], [5.75, 11.0], [5.97, 11.53], [6.5, 11.75], [7.03, 11.53], [7.18, 11.18], [7.25, 11.15], [7.5, 11.25], [8.03, 11.03], [8.18, 10.68], [8.25, 10.65], [8.5, 10.75], [9.03, 10.53], [9.25, 10.0], [9.03, 9.47], [8.5, 9.25], [8.25, 9.35], [8.0, 9.25], [7.75, 9.35], [7.68, 9.32], [7.53, 8.97], [7.0, 8.75], [6.75, 8.85], [6.5, 8.75], [6.25, 8.85], [6.18, 8.82], [6.03, 8.47], [5.5, 8.25], [5.25, 8.35], [5.18, 8.32], [5.03, 7.97], [4.5, 7.75], [4.0, 7.96], [3.5, 7.75], [2.97, 7.97], [2.75, 8.5], [2.97, 9.03], [3.32, 9.18], [3.35, 9.25], [3.25, 9.5]]]]}, "2018-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.25, 9.5], [3.35, 9.75], [3.25, 10.0], [3.47, 10.53], [4.0, 10.75], [4.5, 10.54], [5.0, 10.75], [5.25, 10.65], [5.5, 10.75], [5.75, 10.65], [5.82, 10.68], [5.85, 10.75], [5.75, 11.0], [5.97, 11.53], [6.5, 11.75], [7.03, 11.53], [7.18, 11.18], [7.25, 11.15], [7.5, 11.25], [8.03, 11.03], [8.18, 10.68], [8.25, 10.65], [8.5, 10.75], [9.03, 10.53], [9.25, 10.0], [9.03, 9.47], [8.5, 9.25], [8.25, 9.35], [8.0, 9.25], [7.75, 9.35], [7.68, 9.32], [7.53, 8.97], [7.0, 8.75], [6.75, 8.85], [6.5, 8.75], [6.25, 8.85], [6.18, 8.82], [6.03, 8.47], [5.5, 8.25], [5.25, 8.35], [5.18, 8.32], [5.03, 7.97], [4.5, 7.75], [4.0, 7.96], [3.5, 7.75], [2.97, 7.97], [2.75, 8.5], [2.97, 9.03], [3.32, 9.18], [3.35, 9.25], [3.25, 9.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.040628952629049}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.94995957918272}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.805236197024612, 26.62072525034904, 25.00861164247158]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.737730597406824, 24.027191318047073, 21.65992537365713]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.0399566775745916, -2.1497143499444658, -3.6602077100291015]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.487460649713455, -3.0469452067891893, -5.040628952629049]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.229172090730818, -1.614121922419611, -2.6430170191384352]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.0197075838798444, -2.3322186572045696, -3.3976299535638868]}}