{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:40.106331", "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": "2012-Feb-29_to_2012-Mar-03_26.5_-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": 2012020001608}, "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": "February 29 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 03 2012"}, "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": 282894.20277408336}, "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": ["Angola", "Congo DRC", "Zambia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "E.Southern-Africa", "W.Southern-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": 26.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "26.5\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": 27.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -12.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -7.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-02-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.35, -10.75], [18.25, -10.5], [18.47, -9.97], [18.82, -9.82], [18.97, -9.47], [19.32, -9.32], [19.47, -8.97], [20.0, -8.75], [20.25, -8.85], [20.5, -8.75], [20.75, -8.85], [21.0, -8.75], [21.25, -8.85], [21.32, -8.82], [21.46, -8.5], [21.25, -8.0], [21.47, -7.47], [22.0, -7.25], [22.25, -7.35], [22.5, -7.25], [23.03, -7.47], [23.18, -7.82], [23.25, -7.85], [23.5, -7.75], [23.75, -7.85], [24.0, -7.75], [24.25, -7.85], [24.5, -7.75], [24.75, -7.85], [25.0, -7.75], [25.53, -7.97], [25.68, -8.32], [26.03, -8.47], [26.18, -8.82], [26.25, -8.85], [26.5, -8.75], [27.03, -8.97], [27.18, -9.32], [27.53, -9.47], [27.75, -10.0], [27.65, -10.25], [27.75, -10.5], [27.65, -10.75], [27.75, -11.0], [27.53, -11.53], [27.0, -11.75], [26.7, -11.62], [26.53, -12.03], [26.0, -12.25], [25.75, -12.15], [25.5, -12.25], [25.25, -12.15], [25.0, -12.25], [24.75, -12.15], [24.68, -12.18], [24.53, -12.53], [24.0, -12.75], [23.47, -12.53], [23.32, -12.18], [23.25, -12.15], [23.0, -12.25], [22.75, -12.15], [22.5, -12.25], [22.25, -12.15], [22.0, -12.25], [21.47, -12.03], [21.32, -11.68], [21.25, -11.65], [21.18, -11.68], [21.03, -12.03], [20.5, -12.25], [20.25, -12.15], [20.0, -12.25], [19.75, -12.15], [19.5, -12.25], [19.25, -12.15], [19.0, -12.25], [18.47, -12.03], [18.25, -11.5], [18.35, -11.25], [18.25, -11.0], [18.35, -10.75]]]]}, "2012-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.35, -10.75], [18.25, -10.5], [18.47, -9.97], [18.82, -9.82], [18.97, -9.47], [19.32, -9.32], [19.47, -8.97], [20.0, -8.75], [20.25, -8.85], [20.5, -8.75], [20.75, -8.85], [21.0, -8.75], [21.25, -8.85], [21.32, -8.82], [21.46, -8.5], [21.25, -8.0], [21.47, -7.47], [22.0, -7.25], [22.25, -7.35], [22.5, -7.25], [23.03, -7.47], [23.18, -7.82], [23.25, -7.85], [23.5, -7.75], [23.75, -7.85], [24.0, -7.75], [24.25, -7.85], [24.5, -7.75], [24.75, -7.85], [25.0, -7.75], [25.53, -7.97], [25.68, -8.32], [26.03, -8.47], [26.18, -8.82], [26.25, -8.85], [26.5, -8.75], [27.03, -8.97], [27.18, -9.32], [27.53, -9.47], [27.75, -10.0], [27.65, -10.25], [27.75, -10.5], [27.65, -10.75], [27.75, -11.0], [27.53, -11.53], [27.0, -11.75], [26.7, -11.62], [26.53, -12.03], [26.0, -12.25], [25.75, -12.15], [25.5, -12.25], [25.25, -12.15], [25.0, -12.25], [24.75, -12.15], [24.68, -12.18], [24.53, -12.53], [24.0, -12.75], [23.47, -12.53], [23.32, -12.18], [23.25, -12.15], [23.0, -12.25], [22.75, -12.15], [22.5, -12.25], [22.25, -12.15], [22.0, -12.25], [21.47, -12.03], [21.32, -11.68], [21.25, -11.65], [21.18, -11.68], [21.03, -12.03], [20.5, -12.25], [20.25, -12.15], [20.0, -12.25], [19.75, -12.15], [19.5, -12.25], [19.25, -12.15], [19.0, -12.25], [18.47, -12.03], [18.25, -11.5], [18.35, -11.25], [18.25, -11.0], [18.35, -10.75]]]]}, "2012-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.35, -10.75], [18.25, -10.5], [18.47, -9.97], [18.82, -9.82], [18.97, -9.47], [19.32, -9.32], [19.47, -8.97], [20.0, -8.75], [20.25, -8.85], [20.5, -8.75], [20.75, -8.85], [21.0, -8.75], [21.25, -8.85], [21.32, -8.82], [21.46, -8.5], [21.25, -8.0], [21.47, -7.47], [22.0, -7.25], [22.25, -7.35], [22.5, -7.25], [23.03, -7.47], [23.18, -7.82], [23.25, -7.85], [23.5, -7.75], [23.75, -7.85], [24.0, -7.75], [24.25, -7.85], [24.5, -7.75], [24.75, -7.85], [25.0, -7.75], [25.53, -7.97], [25.68, -8.32], [26.03, -8.47], [26.18, -8.82], [26.25, -8.85], [26.5, -8.75], [27.03, -8.97], [27.18, -9.32], [27.53, -9.47], [27.75, -10.0], [27.65, -10.25], [27.75, -10.5], [27.65, -10.75], [27.75, -11.0], [27.53, -11.53], [27.0, -11.75], [26.7, -11.62], [26.53, -12.03], [26.0, -12.25], [25.75, -12.15], [25.5, -12.25], [25.25, -12.15], [25.0, -12.25], [24.75, -12.15], [24.68, -12.18], [24.53, -12.53], [24.0, -12.75], [23.47, -12.53], [23.32, -12.18], [23.25, -12.15], [23.0, -12.25], [22.75, -12.15], [22.5, -12.25], [22.25, -12.15], [22.0, -12.25], [21.47, -12.03], [21.32, -11.68], [21.25, -11.65], [21.18, -11.68], [21.03, -12.03], [20.5, -12.25], [20.25, -12.15], [20.0, -12.25], [19.75, -12.15], [19.5, -12.25], [19.25, -12.15], [19.0, -12.25], [18.47, -12.03], [18.25, -11.5], [18.35, -11.25], [18.25, -11.0], [18.35, -10.75]]]]}, "2012-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, -10.47], [24.0, -10.25], [24.53, -10.47], [24.75, -11.0], [24.65, -11.25], [24.75, -11.5], [24.53, -12.03], [24.0, -12.25], [23.47, -12.03], [23.25, -11.5], [23.35, -11.25], [23.25, -11.0], [23.47, -10.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.104104795072544}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0564987473568084}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.693352031951804, 19.814424657513314, 19.709637711534924, 19.415880576430595]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.63543156594102, 17.40635123632478, 17.781570467092422, 19.25010216361528]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0710952159728193, -1.9875710572209853, -2.1230203552408273, -1.4896457814211885]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.008542728028658, -2.958629501198004, -3.104104795072544, -1.5264006568149853]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.06975348286901, -1.9703622291306853, -2.093348127633644, -1.4727557846116253]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.1028709894165476, -3.1731120837845452, -3.1358763760891315, -1.4829983294772213]}}