{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:40.255601", "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-Mar-14_to_2022-Mar-17_352.0_30.5"}, "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": 2022030000512}, "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 14 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 17 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": 145162.1792868112}, "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": ["Algeria", "Morocco"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 30.5}, "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": 352.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "352.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 350.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 354.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-10.18, 31.18], [-10.15, 31.25], [-10.25, 31.5], [-10.03, 32.03], [-9.68, 32.18], [-9.53, 32.53], [-9.0, 32.75], [-8.75, 32.65], [-8.68, 32.68], [-8.65, 32.75], [-8.68, 32.82], [-9.03, 32.97], [-9.25, 33.5], [-9.03, 34.03], [-8.68, 34.18], [-8.53, 34.53], [-8.0, 34.75], [-7.75, 34.65], [-7.5, 34.75], [-7.25, 34.65], [-7.0, 34.75], [-6.75, 34.65], [-6.68, 34.68], [-6.53, 35.03], [-6.0, 35.25], [-5.47, 35.03], [-5.25, 34.5], [-5.35, 34.25], [-5.25, 34.0], [-5.46, 33.5], [-5.25, 33.0], [-5.47, 32.47], [-5.82, 32.32], [-5.97, 31.97], [-6.5, 31.75], [-6.75, 31.85], [-6.82, 31.82], [-6.97, 31.47], [-7.32, 31.32], [-7.35, 31.25], [-7.32, 31.18], [-6.97, 31.03], [-6.75, 30.5], [-6.97, 29.97], [-7.32, 29.82], [-7.46, 29.5], [-7.25, 29.0], [-7.35, 28.75], [-7.25, 28.5], [-7.47, 27.97], [-7.82, 27.82], [-7.97, 27.47], [-8.5, 27.25], [-8.75, 27.35], [-9.0, 27.25], [-9.53, 27.47], [-9.68, 27.82], [-10.03, 27.97], [-10.25, 28.5], [-10.15, 28.75], [-10.25, 29.0], [-10.15, 29.25], [-10.25, 29.5], [-10.15, 29.75], [-10.18, 29.82], [-10.53, 29.97], [-10.75, 30.5], [-10.53, 31.03], [-10.18, 31.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "Sahara", "N.Atlantic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.529999999999973, 29.97], [-10.75, 30.5], [-10.529999999999973, 31.03], [-10.180000000000007, 31.18], [-10.149999999999977, 31.25], [-10.25, 31.5], [-10.029999999999973, 32.03], [-9.680000000000007, 32.18], [-9.529999999999973, 32.53], [-9.0, 32.75], [-8.75, 32.65], [-8.680000000000007, 32.68], [-8.649999999999977, 32.75], [-8.680000000000007, 32.82], [-9.029999999999973, 32.97], [-9.25, 33.5], [-9.029999999999973, 34.03], [-8.680000000000007, 34.18], [-8.529999999999973, 34.53], [-8.0, 34.75], [-7.75, 34.65], [-7.5, 34.75], [-7.25, 34.65], [-7.0, 34.75], [-6.75, 34.65], [-6.680000000000007, 34.68], [-6.529999999999973, 35.03], [-6.0, 35.25], [-5.470000000000027, 35.03], [-5.25, 34.5], [-5.350000000000023, 34.25], [-5.25, 34.0], [-5.470000000000027, 33.47], [-5.819999999999993, 33.32], [-5.850000000000023, 33.25], [-5.75, 33.0], [-5.850000000000023, 32.75], [-5.75, 32.5], [-5.970000000000027, 31.97], [-6.5, 31.75], [-6.75, 31.85], [-6.819999999999993, 31.82], [-6.970000000000027, 31.47], [-7.319999999999993, 31.32], [-7.350000000000023, 31.25], [-7.319999999999993, 31.18], [-6.970000000000027, 31.03], [-6.75, 30.5], [-6.970000000000027, 29.97], [-7.319999999999993, 29.82], [-7.4599999999999795, 29.5], [-7.25, 29.0], [-7.350000000000023, 28.75], [-7.25, 28.5], [-7.470000000000027, 27.97], [-7.819999999999993, 27.82], [-7.970000000000027, 27.47], [-8.5, 27.25], [-8.75, 27.35], [-9.0, 27.25], [-9.529999999999973, 27.47], [-9.680000000000007, 27.82], [-10.029999999999973, 27.97], [-10.25, 28.5], [-10.149999999999977, 28.75], [-10.25, 29.0], [-10.149999999999977, 29.25], [-10.25, 29.5], [-10.149999999999977, 29.75], [-10.180000000000007, 29.82], [-10.529999999999973, 29.97]]]]}, "2022-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.529999999999973, 29.97], [-10.75, 30.5], [-10.529999999999973, 31.03], [-10.180000000000007, 31.18], [-10.149999999999977, 31.25], [-10.25, 31.5], [-10.029999999999973, 32.03], [-9.680000000000007, 32.18], [-9.529999999999973, 32.53], [-9.0, 32.75], [-8.75, 32.65], [-8.680000000000007, 32.68], [-8.649999999999977, 32.75], [-8.680000000000007, 32.82], [-9.029999999999973, 32.97], [-9.25, 33.5], [-9.029999999999973, 34.03], [-8.680000000000007, 34.18], [-8.529999999999973, 34.53], [-8.0, 34.75], [-7.75, 34.65], [-7.5, 34.75], [-7.25, 34.65], [-7.0, 34.75], [-6.75, 34.65], [-6.680000000000007, 34.68], [-6.529999999999973, 35.03], [-6.0, 35.25], [-5.470000000000027, 35.03], [-5.25, 34.5], [-5.350000000000023, 34.25], [-5.25, 34.0], [-5.4599999999999795, 33.5], [-5.25, 33.0], [-5.470000000000027, 32.47], [-5.819999999999993, 32.32], [-5.970000000000027, 31.97], [-6.5, 31.75], [-6.75, 31.85], [-6.819999999999993, 31.82], [-6.970000000000027, 31.47], [-7.319999999999993, 31.32], [-7.350000000000023, 31.25], [-7.319999999999993, 31.18], [-6.970000000000027, 31.03], [-6.75, 30.5], [-6.970000000000027, 29.97], [-7.319999999999993, 29.82], [-7.4599999999999795, 29.5], [-7.25, 29.0], [-7.350000000000023, 28.75], [-7.25, 28.5], [-7.470000000000027, 27.97], [-7.819999999999993, 27.82], [-7.970000000000027, 27.47], [-8.5, 27.25], [-8.75, 27.35], [-9.0, 27.25], [-9.529999999999973, 27.47], [-9.680000000000007, 27.82], [-10.029999999999973, 27.97], [-10.25, 28.5], [-10.149999999999977, 28.75], [-10.25, 29.0], [-10.149999999999977, 29.25], [-10.25, 29.5], [-10.149999999999977, 29.75], [-10.180000000000007, 29.82], [-10.529999999999973, 29.97]]]]}, "2022-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.529999999999973, 29.97], [-10.75, 30.5], [-10.529999999999973, 31.03], [-10.180000000000007, 31.18], [-10.149999999999977, 31.25], [-10.25, 31.5], [-10.029999999999973, 32.03], [-9.680000000000007, 32.18], [-9.529999999999973, 32.53], [-9.0, 32.75], [-8.75, 32.65], [-8.680000000000007, 32.68], [-8.649999999999977, 32.75], [-8.680000000000007, 32.82], [-9.029999999999973, 32.97], [-9.25, 33.5], [-9.029999999999973, 34.03], [-8.680000000000007, 34.18], [-8.529999999999973, 34.53], [-8.0, 34.75], [-7.75, 34.65], [-7.5, 34.75], [-7.25, 34.65], [-7.0, 34.75], [-6.75, 34.65], [-6.680000000000007, 34.68], [-6.529999999999973, 35.03], [-6.0, 35.25], [-5.470000000000027, 35.03], [-5.25, 34.5], [-5.350000000000023, 34.25], [-5.25, 34.0], [-5.4599999999999795, 33.5], [-5.25, 33.0], [-5.470000000000027, 32.47], [-5.819999999999993, 32.32], [-5.970000000000027, 31.97], [-6.5, 31.75], [-6.75, 31.85], [-6.819999999999993, 31.82], [-6.970000000000027, 31.47], [-7.319999999999993, 31.32], [-7.350000000000023, 31.25], [-7.319999999999993, 31.18], [-6.970000000000027, 31.03], [-6.75, 30.5], [-6.970000000000027, 29.97], [-7.319999999999993, 29.82], [-7.4599999999999795, 29.5], [-7.25, 29.0], [-7.350000000000023, 28.75], [-7.25, 28.5], [-7.470000000000027, 27.97], [-7.819999999999993, 27.82], [-7.970000000000027, 27.47], [-8.5, 27.25], [-8.75, 27.35], [-9.0, 27.25], [-9.529999999999973, 27.47], [-9.680000000000007, 27.82], [-10.029999999999973, 27.97], [-10.25, 28.5], [-10.149999999999977, 28.75], [-10.25, 29.0], [-10.149999999999977, 29.25], [-10.25, 29.5], [-10.149999999999977, 29.75], [-10.180000000000007, 29.82], [-10.529999999999973, 29.97]]]]}, "2022-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.529999999999973, 33.53], [-6.0, 33.75], [-5.470000000000027, 33.53], [-5.25, 33.0], [-5.470000000000027, 32.47], [-6.0, 32.25], [-6.529999999999973, 32.47], [-6.75, 33.0], [-6.529999999999973, 33.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.852574408688838}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.994456395303835}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.160135318631035, 9.588193528348938, 11.601931576909124, 9.370880871203155]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.099762273531951, -0.15669204413637772, 1.1794889514017655, 9.370880871203155]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.566843727286933, -6.145976673797281, -4.282014151074889, -3.936248583669112]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.620467282956554, -8.852574408688838, -6.315573036721787, -3.936248583669112]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6420598461634819, -2.247341449944547, -1.5949332154289235, -1.5108410593718293]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5465442105299796, -3.1303316072090026, -2.1599620306947713, -1.5108410593718293]}}