{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:55:50.129338", "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": "2014-Mar-01_to_2014-Mar-07_7.5_9.0"}, "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": 2014030000094}, "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 01 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 07 2014"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 223730.9233711391}, "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": ["Cameroon", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "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": 9.0}, "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": 7.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "7.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 6.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 13.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.85, 6.75], [6.75, 7.0], [6.85, 7.25], [6.75, 7.5], [6.96, 8.0], [6.75, 8.5], [6.85, 8.75], [6.75, 9.0], [6.85, 9.25], [6.75, 9.5], [6.97, 10.03], [7.5, 10.25], [7.75, 10.15], [8.0, 10.25], [8.25, 10.15], [8.5, 10.25], [9.03, 10.03], [9.18, 9.68], [9.5, 9.54], [10.0, 9.75], [10.53, 9.53], [10.75, 9.0], [10.65, 8.75], [10.68, 8.68], [10.75, 8.65], [11.0, 8.75], [11.53, 8.53], [11.68, 8.18], [11.75, 8.15], [12.0, 8.25], [12.25, 8.15], [12.5, 8.25], [13.03, 8.03], [13.25, 7.5], [13.13, 7.2], [13.53, 7.03], [13.68, 6.68], [14.03, 6.53], [14.25, 6.0], [14.03, 5.47], [13.5, 5.25], [13.25, 5.35], [13.0, 5.25], [12.75, 5.35], [12.5, 5.25], [12.25, 5.35], [12.0, 5.25], [11.75, 5.35], [11.5, 5.25], [11.2, 5.38], [11.03, 4.97], [10.5, 4.75], [9.97, 4.97], [9.82, 5.32], [9.47, 5.47], [9.32, 5.82], [9.25, 5.85], [9.0, 5.75], [8.75, 5.85], [8.5, 5.75], [8.25, 5.85], [8.18, 5.82], [8.03, 5.47], [7.5, 5.25], [6.97, 5.47], [6.75, 6.0], [6.85, 6.25], [6.75, 6.5], [6.85, 6.75]]]]}, "2014-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.85, 6.75], [6.75, 7.0], [6.85, 7.25], [6.75, 7.5], [6.96, 8.0], [6.75, 8.5], [6.85, 8.75], [6.75, 9.0], [6.85, 9.25], [6.75, 9.5], [6.97, 10.03], [7.5, 10.25], [7.75, 10.15], [8.0, 10.25], [8.25, 10.15], [8.5, 10.25], [9.03, 10.03], [9.18, 9.68], [9.5, 9.54], [10.0, 9.75], [10.53, 9.53], [10.68, 9.18], [10.75, 9.15], [11.0, 9.25], [11.53, 9.03], [11.75, 8.5], [11.65, 8.25], [11.68, 8.18], [11.75, 8.15], [12.0, 8.25], [12.25, 8.15], [12.5, 8.25], [13.03, 8.03], [13.25, 7.5], [13.13, 7.2], [13.53, 7.03], [13.68, 6.68], [14.03, 6.53], [14.25, 6.0], [14.03, 5.47], [13.5, 5.25], [13.25, 5.35], [13.0, 5.25], [12.75, 5.35], [12.5, 5.25], [12.25, 5.35], [12.18, 5.32], [12.03, 4.97], [11.5, 4.75], [11.0, 4.96], [10.5, 4.75], [9.97, 4.97], [9.82, 5.32], [9.5, 5.46], [9.0, 5.25], [8.75, 5.35], [8.68, 5.32], [8.53, 4.97], [8.0, 4.75], [7.47, 4.97], [7.32, 5.32], [6.97, 5.47], [6.75, 6.0], [6.85, 6.25], [6.75, 6.5], [6.85, 6.75]]]]}, "2014-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.85, 6.75], [6.75, 7.0], [6.85, 7.25], [6.75, 7.5], [6.96, 8.0], [6.75, 8.5], [6.85, 8.75], [6.75, 9.0], [6.85, 9.25], [6.75, 9.5], [6.97, 10.03], [7.5, 10.25], [7.75, 10.15], [8.0, 10.25], [8.25, 10.15], [8.5, 10.25], [9.03, 10.03], [9.18, 9.68], [9.5, 9.54], [10.0, 9.75], [10.53, 9.53], [10.68, 9.18], [10.75, 9.15], [11.0, 9.25], [11.53, 9.03], [11.75, 8.5], [11.65, 8.25], [11.68, 8.18], [11.75, 8.15], [12.0, 8.25], [12.25, 8.15], [12.5, 8.25], [13.03, 8.03], [13.25, 7.5], [13.13, 7.2], [13.53, 7.03], [13.68, 6.68], [14.03, 6.53], [14.25, 6.0], [14.03, 5.47], [13.5, 5.25], [13.25, 5.35], [13.0, 5.25], [12.75, 5.35], [12.5, 5.25], [12.25, 5.35], [12.18, 5.32], [12.03, 4.97], [11.5, 4.75], [11.0, 4.96], [10.5, 4.75], [9.97, 4.97], [9.82, 5.32], [9.5, 5.46], [9.0, 5.25], [8.75, 5.35], [8.68, 5.32], [8.53, 4.97], [8.0, 4.75], [7.47, 4.97], [7.32, 5.32], [6.97, 5.47], [6.75, 6.0], [6.85, 6.25], [6.75, 6.5], [6.85, 6.75]]]]}, "2014-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.85, 6.75], [6.75, 7.0], [6.97, 7.53], [7.32, 7.68], [7.35, 7.75], [7.25, 8.0], [7.35, 8.25], [7.32, 8.32], [6.97, 8.47], [6.75, 9.0], [6.97, 9.53], [7.32, 9.68], [7.47, 10.03], [8.0, 10.25], [8.53, 10.03], [8.75, 9.5], [8.65, 9.25], [8.7, 9.13], [9.0, 9.25], [9.25, 9.15], [9.5, 9.25], [10.0, 9.04], [10.5, 9.25], [10.75, 9.15], [11.0, 9.25], [11.53, 9.03], [11.75, 8.5], [11.65, 8.25], [11.68, 8.18], [12.03, 8.03], [12.25, 7.5], [12.15, 7.25], [12.25, 7.0], [12.13, 6.7], [12.53, 6.53], [12.75, 6.0], [12.53, 5.47], [12.18, 5.32], [12.03, 4.97], [11.5, 4.75], [10.97, 4.97], [10.8, 5.38], [10.5, 5.25], [9.97, 5.47], [9.75, 6.0], [9.53, 5.47], [9.0, 5.25], [8.75, 5.35], [8.68, 5.32], [8.53, 4.97], [8.0, 4.75], [7.47, 4.97], [7.32, 5.32], [6.97, 5.47], [6.75, 6.0], [6.85, 6.25], [6.75, 6.5], [6.85, 6.75]], [[9.85, 6.25], [9.75, 6.5], [9.65, 6.25], [9.75, 6.0], [9.85, 6.25]], [[9.88, 6.8], [9.7, 6.88], [9.65, 6.75], [9.75, 6.5], [9.88, 6.8]], [[11.38, 6.3], [11.2, 6.38], [11.15, 6.25], [11.2, 6.13], [11.32, 6.18], [11.38, 6.3]]]]}, "2014-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.75, 9.0], [5.97, 9.53], [6.32, 9.68], [6.47, 10.03], [7.0, 10.25], [7.5, 10.04], [8.0, 10.25], [8.53, 10.03], [8.75, 9.5], [8.53, 8.97], [8.18, 8.82], [8.15, 8.75], [8.25, 8.5], [8.03, 7.97], [7.5, 7.75], [7.25, 7.85], [7.0, 7.75], [6.47, 7.97], [6.32, 8.32], [5.97, 8.47], [5.75, 9.0]]]]}, "2014-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.75, 9.0], [5.97, 9.53], [6.32, 9.68], [6.47, 10.03], [7.0, 10.25], [7.5, 10.04], [8.0, 10.25], [8.53, 10.03], [8.75, 9.5], [8.53, 8.97], [8.18, 8.82], [8.15, 8.75], [8.25, 8.5], [8.03, 7.97], [7.5, 7.75], [7.25, 7.85], [7.0, 7.75], [6.47, 7.97], [6.32, 8.32], [5.97, 8.47], [5.75, 9.0]]]]}, "2014-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.75, 9.0], [5.97, 9.53], [6.32, 9.68], [6.47, 10.03], [7.0, 10.25], [7.53, 10.03], [7.68, 9.68], [8.03, 9.53], [8.25, 9.0], [8.15, 8.75], [8.25, 8.5], [8.03, 7.97], [7.5, 7.75], [7.25, 7.85], [7.0, 7.75], [6.47, 7.97], [6.32, 8.32], [5.97, 8.47], [5.75, 9.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.303560878657663}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.446858984470694}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.292484444348588, 25.99132537119533, 25.98744683052547, 27.721234152757404, 29.168892764907298, 28.835724847262952, 29.558081837966313]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.747775462354355, 19.860721916607872, 18.96307903333428, 20.914088316543257, 27.363143235726, 27.560818292539295, 28.397372528794563]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.275660613887444, -2.7377838419487532, -2.788881875575486, -1.9792476295428103, -1.6294602996951457, -1.9955887110558268, -1.534532522536163]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.0576098714954014, -4.303560878657663, -3.9335645368437326, -2.9030888545306652, -1.950310862729168, -2.370089908433215, -1.754970967317945]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.762691188937981, -2.2092110690311544, -2.3299951542867445, -1.6492061152102644, -1.581445868416573, -1.9910824783375176, -1.5290667167035432]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.51129542863313, -3.4744887138826224, -3.3473316309361283, -2.379969092294928, -1.8316390423520486, -2.326901261654504, -1.7520369248731116]}}