{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:46.992302", "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": "2011-Nov-03_to_2011-Nov-06_15.0_11.5"}, "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": 2011110000281}, "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": "November 03 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 06 2011"}, "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": 63528.9044701064}, "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", "Chad", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-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": 11.5}, "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": 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": 14.25}, "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": 10.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-11-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.97, 13.03], [14.5, 13.25], [14.8, 13.13], [14.97, 13.53], [15.5, 13.75], [15.75, 13.65], [16.0, 13.75], [16.53, 13.53], [16.68, 13.18], [17.03, 13.03], [17.18, 12.68], [17.53, 12.53], [17.75, 12.0], [17.65, 11.75], [17.75, 11.5], [17.53, 10.97], [17.0, 10.75], [16.75, 10.85], [16.68, 10.82], [16.53, 10.47], [16.0, 10.25], [15.75, 10.35], [15.5, 10.25], [15.25, 10.35], [15.0, 10.25], [14.47, 10.47], [14.32, 10.82], [13.97, 10.97], [13.75, 11.5], [13.96, 12.0], [13.75, 12.5], [13.97, 13.03]]]]}, "2011-11-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.97, 13.03], [14.5, 13.25], [14.8, 13.13], [14.97, 13.53], [15.5, 13.75], [15.75, 13.65], [16.0, 13.75], [16.53, 13.53], [16.68, 13.18], [17.03, 13.03], [17.18, 12.68], [17.53, 12.53], [17.75, 12.0], [17.65, 11.75], [17.75, 11.5], [17.53, 10.97], [17.0, 10.75], [16.75, 10.85], [16.68, 10.82], [16.65, 10.75], [16.75, 10.5], [16.53, 9.97], [16.0, 9.75], [15.47, 9.97], [15.32, 10.32], [15.25, 10.35], [15.0, 10.25], [14.47, 10.47], [14.32, 10.82], [13.97, 10.97], [13.75, 11.5], [13.96, 12.0], [13.75, 12.5], [13.97, 13.03]]]]}, "2011-11-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.97, 13.03], [14.5, 13.25], [14.8, 13.13], [14.97, 13.53], [15.5, 13.75], [15.75, 13.65], [16.0, 13.75], [16.53, 13.53], [16.68, 13.18], [17.03, 13.03], [17.18, 12.68], [17.53, 12.53], [17.75, 12.0], [17.65, 11.75], [17.75, 11.5], [17.53, 10.97], [17.0, 10.75], [16.75, 10.85], [16.68, 10.82], [16.65, 10.75], [16.75, 10.5], [16.53, 9.97], [16.0, 9.75], [15.47, 9.97], [15.32, 10.32], [15.25, 10.35], [15.0, 10.25], [14.47, 10.47], [14.32, 10.82], [13.97, 10.97], [13.75, 11.5], [13.96, 12.0], [13.75, 12.5], [13.97, 13.03]]]]}, "2011-11-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.97, 10.97], [13.75, 11.5], [13.97, 12.03], [14.5, 12.25], [14.75, 12.15], [15.0, 12.25], [15.53, 12.03], [15.7, 11.63], [15.82, 11.68], [15.97, 12.03], [16.5, 12.25], [16.75, 12.15], [17.0, 12.25], [17.53, 12.03], [17.75, 11.5], [17.53, 10.97], [17.0, 10.75], [16.75, 10.85], [16.68, 10.82], [16.65, 10.75], [16.75, 10.5], [16.53, 9.97], [16.0, 9.75], [15.47, 9.97], [15.25, 10.5], [15.35, 10.75], [15.3, 10.88], [15.0, 10.75], [14.75, 10.85], [14.5, 10.75], [13.97, 10.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.3919504006797183}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.3848167050484403}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.29163231985234, 26.217115793517166, 26.5018775173495, 27.2171381760013]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.78477160811343, 25.698855544182322, 25.99217540324628, 26.849694845931197]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.871963908487831, -2.8922964074737716, -2.5483896204348184, -1.7456418645761573]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.205020631267473, -3.3919504006797183, -3.0722026318586586, -1.8800371416328403]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.602769607622972, -2.4760956896304016, -2.1351745532044855, -1.446320611125272]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9622817358511941, -2.936973331103614, -2.693664563490214, -1.5906567548682644]}}