{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:21:31.808026", "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": "2022-Jul-08_to_2022-Jul-11_341.5_19.5"}, "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": 2022070000407}, "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": "July 08 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 11 2022"}, "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": 52281.28089427991}, "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": ["Mauritania"]}, "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": ["Atlantic Ocean"]}, "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": 19.5}, "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": 341.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "341.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 341.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 344.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-18.65, 20.75], [-18.75, 21.0], [-18.53, 21.53], [-18.0, 21.75], [-17.5, 21.54], [-17.0, 21.75], [-16.47, 21.53], [-16.32, 21.18], [-15.97, 21.03], [-15.82, 20.68], [-15.47, 20.53], [-15.25, 20.0], [-15.46, 19.5], [-15.25, 19.0], [-15.47, 18.47], [-16.0, 18.25], [-16.53, 18.47], [-16.68, 18.82], [-16.75, 18.85], [-17.0, 18.75], [-17.3, 18.88], [-17.47, 18.47], [-18.0, 18.25], [-18.53, 18.47], [-18.68, 18.82], [-19.03, 18.97], [-19.25, 19.5], [-19.15, 19.75], [-19.25, 20.0], [-19.03, 20.53], [-18.68, 20.68], [-18.65, 20.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-19.25, 20.0], [-19.029999999999973, 20.53], [-18.680000000000007, 20.68], [-18.649999999999977, 20.75], [-18.75, 21.0], [-18.529999999999973, 21.53], [-18.0, 21.75], [-17.470000000000027, 21.53], [-17.319999999999993, 21.18], [-17.25, 21.15], [-17.0, 21.25], [-16.470000000000027, 21.03], [-16.25, 20.5], [-16.350000000000023, 20.25], [-16.25, 20.0], [-16.350000000000023, 19.75], [-16.25, 19.5], [-16.470000000000027, 18.97], [-17.0, 18.75], [-17.30000000000001, 18.88], [-17.470000000000027, 18.47], [-18.0, 18.25], [-18.529999999999973, 18.47], [-18.680000000000007, 18.82], [-19.029999999999973, 18.97], [-19.25, 19.5], [-19.149999999999977, 19.75], [-19.25, 20.0]]]]}, "2022-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-19.25, 20.0], [-19.029999999999973, 20.53], [-18.680000000000007, 20.68], [-18.649999999999977, 20.75], [-18.75, 21.0], [-18.529999999999973, 21.53], [-18.0, 21.75], [-17.5, 21.54], [-17.0, 21.75], [-16.470000000000027, 21.53], [-16.319999999999993, 21.18], [-15.970000000000027, 21.03], [-15.819999999999993, 20.68], [-15.470000000000027, 20.53], [-15.25, 20.0], [-15.45999999999998, 19.5], [-15.25, 19.0], [-15.470000000000027, 18.47], [-16.0, 18.25], [-16.529999999999973, 18.47], [-16.680000000000007, 18.82], [-16.75, 18.85], [-17.0, 18.75], [-17.30000000000001, 18.88], [-17.470000000000027, 18.47], [-18.0, 18.25], [-18.529999999999973, 18.47], [-18.680000000000007, 18.82], [-19.029999999999973, 18.97], [-19.25, 19.5], [-19.149999999999977, 19.75], [-19.25, 20.0]]]]}, "2022-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-19.25, 20.0], [-19.029999999999973, 20.53], [-18.680000000000007, 20.68], [-18.649999999999977, 20.75], [-18.75, 21.0], [-18.529999999999973, 21.53], [-18.0, 21.75], [-17.5, 21.54], [-17.0, 21.75], [-16.470000000000027, 21.53], [-16.319999999999993, 21.18], [-15.970000000000027, 21.03], [-15.819999999999993, 20.68], [-15.470000000000027, 20.53], [-15.25, 20.0], [-15.45999999999998, 19.5], [-15.25, 19.0], [-15.470000000000027, 18.47], [-16.0, 18.25], [-16.529999999999973, 18.47], [-16.680000000000007, 18.82], [-16.75, 18.85], [-17.0, 18.75], [-17.30000000000001, 18.88], [-17.470000000000027, 18.47], [-18.0, 18.25], [-18.529999999999973, 18.47], [-18.680000000000007, 18.82], [-19.029999999999973, 18.97], [-19.25, 19.5], [-19.149999999999977, 19.75], [-19.25, 20.0]]]]}, "2022-07-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.529999999999973, 20.47], [-17.75, 21.0], [-17.529999999999973, 21.53], [-17.0, 21.75], [-16.470000000000027, 21.53], [-16.319999999999993, 21.18], [-15.970000000000027, 21.03], [-15.819999999999993, 20.68], [-15.470000000000027, 20.53], [-15.25, 20.0], [-15.45999999999998, 19.5], [-15.25, 19.0], [-15.470000000000027, 18.47], [-16.0, 18.25], [-16.529999999999973, 18.47], [-16.680000000000007, 18.82], [-17.029999999999973, 18.97], [-17.25, 19.5], [-17.149999999999977, 19.75], [-17.25, 20.0], [-17.149999999999977, 20.25], [-17.180000000000007, 20.32], [-17.529999999999973, 20.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.064995831314093}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0018119347587437}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.89665747121734, 20.85333052397499, 20.963527794715787, 22.80845715938898]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.571938382821315, 18.549296031134304, 19.24732738743222, 20.622284193634016]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6065372736690098, -2.081124336408433, -1.948974310787602, -2.71293692390257]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8823797953265853, -4.010725847997321, -5.022120158530242, -5.064995831314093]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.706189555351302, -1.7378887481330745, -1.5156553158248085, -1.3460170004830208]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1188511624029363, -2.1611380752961327, -1.8190126722243618, -1.7057671404506034]}}