{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:40.602754", "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-15_to_2022-Mar-18_355.0_32.0"}, "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": 2022030000539}, "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 15 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 18 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": 60764.14436874967}, "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": []}, "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": 32.0}, "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": 355.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "355.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 354.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 356.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-5.65, 30.75], [-5.75, 31.0], [-5.65, 31.25], [-5.68, 31.32], [-6.03, 31.47], [-6.25, 32.0], [-6.03, 32.53], [-5.68, 32.68], [-5.53, 33.03], [-5.0, 33.25], [-4.75, 33.15], [-4.5, 33.25], [-4.25, 33.15], [-4.0, 33.25], [-3.75, 33.15], [-3.5, 33.25], [-2.97, 33.03], [-2.75, 32.5], [-2.85, 32.25], [-2.75, 32.0], [-2.85, 31.75], [-2.75, 31.5], [-2.97, 30.97], [-3.32, 30.82], [-3.47, 30.47], [-3.82, 30.32], [-3.85, 30.25], [-3.75, 30.0], [-3.97, 29.47], [-4.32, 29.32], [-4.47, 28.97], [-5.0, 28.75], [-5.25, 28.85], [-5.5, 28.75], [-6.03, 28.97], [-6.25, 29.5], [-6.15, 29.75], [-6.25, 30.0], [-6.03, 30.53], [-5.68, 30.68], [-5.65, 30.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.25, 30.0], [-6.029999999999973, 30.53], [-5.680000000000007, 30.68], [-5.649999999999977, 30.75], [-5.75, 31.0], [-5.649999999999977, 31.25], [-5.680000000000007, 31.32], [-6.029999999999973, 31.47], [-6.25, 32.0], [-6.029999999999973, 32.53], [-5.680000000000007, 32.68], [-5.529999999999973, 33.03], [-5.0, 33.25], [-4.75, 33.15], [-4.5, 33.25], [-4.25, 33.15], [-4.0, 33.25], [-3.75, 33.15], [-3.5, 33.25], [-2.9700000000000273, 33.03], [-2.75, 32.5], [-2.8500000000000227, 32.25], [-2.75, 32.0], [-2.8500000000000227, 31.75], [-2.75, 31.5], [-2.9700000000000273, 30.97], [-3.319999999999993, 30.82], [-3.4700000000000273, 30.47], [-3.819999999999993, 30.32], [-3.8500000000000227, 30.25], [-3.75, 30.0], [-3.9700000000000273, 29.47], [-4.319999999999993, 29.32], [-4.470000000000027, 28.97], [-5.0, 28.75], [-5.25, 28.85], [-5.5, 28.75], [-6.029999999999973, 28.97], [-6.25, 29.5], [-6.149999999999977, 29.75], [-6.25, 30.0]]]]}, "2022-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.25, 30.0], [-6.029999999999973, 30.53], [-5.680000000000007, 30.68], [-5.649999999999977, 30.75], [-5.75, 31.0], [-5.649999999999977, 31.25], [-5.680000000000007, 31.32], [-6.029999999999973, 31.47], [-6.25, 32.0], [-6.029999999999973, 32.53], [-5.680000000000007, 32.68], [-5.529999999999973, 33.03], [-5.0, 33.25], [-4.75, 33.15], [-4.5, 33.25], [-4.25, 33.15], [-4.0, 33.25], [-3.75, 33.15], [-3.5, 33.25], [-2.9700000000000273, 33.03], [-2.75, 32.5], [-2.8500000000000227, 32.25], [-2.75, 32.0], [-2.8500000000000227, 31.75], [-2.75, 31.5], [-2.9700000000000273, 30.97], [-3.319999999999993, 30.82], [-3.4700000000000273, 30.47], [-3.819999999999993, 30.32], [-3.8500000000000227, 30.25], [-3.75, 30.0], [-3.9700000000000273, 29.47], [-4.319999999999993, 29.32], [-4.470000000000027, 28.97], [-5.0, 28.75], [-5.25, 28.85], [-5.5, 28.75], [-6.029999999999973, 28.97], [-6.25, 29.5], [-6.149999999999977, 29.75], [-6.25, 30.0]]]]}, "2022-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.25, 30.0], [-6.029999999999973, 30.53], [-5.680000000000007, 30.68], [-5.649999999999977, 30.75], [-5.75, 31.0], [-5.649999999999977, 31.25], [-5.680000000000007, 31.32], [-6.029999999999973, 31.47], [-6.25, 32.0], [-6.029999999999973, 32.53], [-5.680000000000007, 32.68], [-5.529999999999973, 33.03], [-5.0, 33.25], [-4.75, 33.15], [-4.5, 33.25], [-4.25, 33.15], [-4.0, 33.25], [-3.75, 33.15], [-3.5, 33.25], [-2.9700000000000273, 33.03], [-2.75, 32.5], [-2.8500000000000227, 32.25], [-2.75, 32.0], [-2.8500000000000227, 31.75], [-2.75, 31.5], [-2.9700000000000273, 30.97], [-3.319999999999993, 30.82], [-3.4700000000000273, 30.47], [-3.819999999999993, 30.32], [-3.8500000000000227, 30.25], [-3.75, 30.0], [-3.9700000000000273, 29.47], [-4.319999999999993, 29.32], [-4.470000000000027, 28.97], [-5.0, 28.75], [-5.25, 28.85], [-5.5, 28.75], [-6.029999999999973, 28.97], [-6.25, 29.5], [-6.149999999999977, 29.75], [-6.25, 30.0]]]]}, "2022-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.5, 31.25], [-6.029999999999973, 31.47], [-6.25, 32.0], [-6.029999999999973, 32.53], [-5.5, 32.75], [-5.25, 32.65], [-5.0, 32.75], [-4.75, 32.65], [-4.5, 32.75], [-3.9700000000000273, 32.53], [-3.75, 32.0], [-3.8500000000000227, 31.75], [-3.75, 31.5], [-3.9700000000000273, 30.97], [-4.5, 30.75], [-5.029999999999973, 30.97], [-5.180000000000007, 31.32], [-5.25, 31.35], [-5.5, 31.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.732615068778102}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.495288048331303}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.741044874720274, 8.938997274023961, 10.964443230321649, 8.057325789207368]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.1363605937106627, -2.755550677734618, -1.2343415567980855, 0.639429733692964]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.212566332809076, -6.177252957333832, -4.377485858028323, -3.8770022800617028]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.106376336436256, -8.732615068778102, -6.14680634241887, -4.460325184221688]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.135935829901888, -2.207351346220875, -1.6491123964220744, -1.4630280238004154]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7802368275026375, -2.9903388904344257, -2.1253519902270948, -1.564969750023368]}}