{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:25.261499", "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-Mar-28_to_2018-Apr-02_11.0_17.5"}, "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": 2018030001126}, "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 28 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 02 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 94367.43898322535}, "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": ["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": 17.5}, "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": 11.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "11.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 8.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 12.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 19.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.47, 19.03], [8.82, 19.18], [8.97, 19.53], [9.5, 19.75], [10.03, 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16.82], [7.97, 16.97], [7.75, 17.5]]]]}, "2018-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.75, 17.5], [7.97, 18.03], [8.32, 18.18], [8.35, 18.25], [8.25, 18.5], [8.47, 19.03], [8.82, 19.18], [8.97, 19.53], [9.5, 19.75], [10.03, 19.53], [10.25, 19.0], [10.15, 18.75], [10.18, 18.68], [10.25, 18.65], [10.32, 18.68], [10.47, 19.03], [11.0, 19.25], [11.25, 19.15], [11.5, 19.25], [11.75, 19.15], [12.0, 19.25], [12.53, 19.03], [12.75, 18.5], [12.65, 18.25], [12.75, 18.0], [12.53, 17.47], [12.0, 17.25], [11.75, 17.35], [11.68, 17.32], [11.65, 17.25], [11.68, 17.18], [12.03, 17.03], [12.25, 16.5], [12.03, 15.97], [11.68, 15.82], [11.53, 15.47], [11.0, 15.25], [10.75, 15.35], [10.5, 15.25], [10.25, 15.35], [10.0, 15.25], [9.47, 15.47], [9.3, 15.88], [9.0, 15.75], [8.47, 15.97], [8.25, 16.5], [8.35, 16.75], [8.32, 16.82], [7.97, 16.97], [7.75, 17.5]]]]}, "2018-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.75, 17.5], [7.97, 18.03], [8.5, 18.25], [8.75, 18.15], [9.0, 18.25], [9.25, 18.15], [9.32, 18.18], [9.47, 18.53], [10.0, 18.75], [10.25, 18.65], [10.32, 18.68], [10.47, 19.03], [11.0, 19.25], [11.25, 19.15], [11.5, 19.25], [11.75, 19.15], [12.0, 19.25], [12.53, 19.03], [12.75, 18.5], [12.65, 18.25], [12.75, 18.0], [12.54, 17.5], [12.75, 17.0], [12.53, 16.47], [12.18, 16.32], [12.03, 15.97], [11.68, 15.82], [11.53, 15.47], [11.0, 15.25], [10.75, 15.35], [10.5, 15.25], [10.25, 15.35], [10.0, 15.25], [9.47, 15.47], [9.3, 15.88], [9.0, 15.75], [8.47, 15.97], [8.25, 16.5], [8.35, 16.75], [8.32, 16.82], [7.97, 16.97], [7.75, 17.5]]]]}, "2018-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.97, 18.03], [9.32, 18.18], [9.47, 18.53], [10.0, 18.75], [10.25, 18.65], [10.5, 18.75], [10.75, 18.65], [11.0, 18.75], [11.25, 18.65], [11.5, 18.75], [11.75, 18.65], [12.0, 18.75], [12.53, 18.53], [12.75, 18.0], [12.54, 17.5], [12.75, 17.0], [12.53, 16.47], [12.0, 16.25], [11.75, 16.35], [11.5, 16.25], [11.25, 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[20.494122661770916, 20.932176421509723, 22.33096212687326, 23.11585582298403, 22.892349537960627, 23.255818903826878]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.900166942774206, 18.05855191853891, 20.69372110571385, 21.989029246117468, 22.256343114342826, 22.88844891415539]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.807075549849728, -4.949983226708732, -3.7176448929035018, -3.1797807840472467, -3.275062028097735, -3.0593396791718797]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.115793543936263, -7.160730198346641, -4.652312087273742, -3.87729664726146, -3.680950653308116, -3.2292534743189094]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6504493344716662, -1.9330052989778415, -1.5261928120569337, -1.3635398520893258, -1.4169777409788806, -1.3969614941799968]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6783258655655913, -2.3905003540687497, -1.9067697477192183, -1.5203622570749513, -1.5706799427230531, -1.4737335055760812]}}