{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:27.354202", "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": "2021-Nov-09_to_2021-Nov-12_1.0_20.0"}, "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": 2021110000369}, "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 09 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 12 2021"}, "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": 144659.09289444695}, "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", "Mali"]}, "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": 20.5}, "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": 359.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "1.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 356.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 362.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[2.53, 19.97], [2.18, 19.82], [2.03, 19.47], [1.5, 19.25], [1.25, 19.35], [1.18, 19.32], [1.03, 18.97], [0.5, 18.75], [0.25, 18.85], [0.0, 18.75], [-0.25, 18.85], [-0.5, 18.75], [-0.75, 18.85], [-1.0, 18.75], [-1.25, 18.85], [-1.5, 18.75], [-1.75, 18.85], [-2.0, 18.75], [-2.25, 18.85], [-2.5, 18.75], [-3.03, 18.97], [-3.18, 19.32], [-3.25, 19.35], [-3.5, 19.25], [-3.75, 19.35], [-4.0, 19.25], [-4.53, 19.47], [-4.75, 20.0], [-4.53, 20.53], [-4.0, 20.75], [-3.75, 20.65], [-3.68, 20.68], [-3.53, 21.03], [-3.0, 21.25], [-2.75, 21.15], [-2.5, 21.25], [-2.25, 21.15], [-2.18, 21.18], [-2.03, 21.53], [-1.68, 21.68], [-1.53, 22.03], [-1.0, 22.25], [-0.75, 22.15], [-0.5, 22.25], [-0.25, 22.15], [0.0, 22.25], [0.25, 22.15], [0.32, 22.18], [0.47, 22.53], [1.0, 22.75], [1.25, 22.65], [1.5, 22.75], [1.75, 22.65], [2.0, 22.75], [2.25, 22.65], [2.5, 22.75], [3.03, 22.53], [3.25, 22.0], [3.15, 21.75], [3.25, 21.5], [3.03, 20.97], [2.68, 20.82], [2.65, 20.75], [2.75, 20.5], [2.53, 19.97]]]]}}, "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": {"2021-11-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.0, 19.25], [-4.529999999999973, 19.47], [-4.75, 20.0], [-4.529999999999973, 20.53], [-4.0, 20.75], [-3.75, 20.65], [-3.680000000000007, 20.68], [-3.5299999999999727, 21.03], [-3.0, 21.25], [-2.75, 21.15], [-2.5, 21.25], [-2.25, 21.15], [-2.180000000000007, 21.18], [-2.0299999999999727, 21.53], [-1.6800000000000068, 21.68], [-1.5299999999999727, 22.03], [-1.0, 22.25], [-0.75, 22.15], [-0.5, 22.25], [-0.25, 22.15], [0.0, 22.25], [0.25, 22.15], [0.3199999999999932, 22.18], [0.4700000000000273, 22.53], [1.0, 22.75], [1.25, 22.65], [1.5, 22.75], [1.75, 22.65], [2.0, 22.75], [2.25, 22.65], [2.5, 22.75], [3.0299999999999727, 22.53], [3.25, 22.0], [3.1499999999999773, 21.75], [3.25, 21.5], [3.0299999999999727, 20.97], [2.680000000000007, 20.82], [2.6499999999999773, 20.75], [2.75, 20.5], 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amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.099436403796454}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.33593515377254, 19.882304913003168, 20.6290238761444, NaN]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.579992590060726, 19.05730804737442, 19.840415846446774, NaN]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.359544765198666, -4.49217566961952, -3.4465887765711756, NaN]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.3314680369708185, -5.044936386760696, -4.009050261710172, NaN]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8529792683599127, -1.9390472719639869, -1.517240291801509, NaN]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.209862913840333, -2.155574739576877, -1.7387222181191295, NaN]}}