{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:21.291475", "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": "2025-Jul-13_to_2025-Jul-15_359.0_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": 2025070000584}, "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 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 15 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 101263.58971864737}, "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": ["Mali"]}, "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": 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": 359.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "359.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 356.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 361.5}, "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": [[[[-4.03, 21.03], [-3.68, 21.18], [-3.53, 21.53], [-3.18, 21.68], [-3.03, 22.03], [-2.68, 22.18], [-2.53, 22.53], [-2.0, 22.75], [-1.75, 22.65], [-1.5, 22.75], [-0.97, 22.53], [-0.82, 22.18], [-0.47, 22.03], [-0.32, 21.68], [-0.25, 21.65], [0.0, 21.75], [0.53, 21.53], [0.68, 21.18], [0.75, 21.15], [1.0, 21.25], [1.25, 21.15], [1.5, 21.25], [2.03, 21.03], [2.25, 20.5], [2.03, 19.97], [1.5, 19.75], [1.25, 19.85], [1.18, 19.82], [1.03, 19.47], [0.5, 19.25], [0.25, 19.35], [0.0, 19.25], [-0.25, 19.35], [-0.32, 19.32], [-0.47, 18.97], [-1.0, 18.75], [-1.25, 18.85], [-1.5, 18.75], [-1.75, 18.85], [-2.0, 18.75], [-2.53, 18.97], [-2.68, 19.32], [-2.75, 19.35], [-3.0, 19.25], [-3.53, 19.47], [-3.68, 19.82], [-4.03, 19.97], [-4.25, 20.5], [-4.03, 21.03]]]]}}, "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": {"2025-07-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.029999999999973, 19.97], [-4.25, 20.5], [-4.029999999999973, 21.03], [-3.680000000000007, 21.18], [-3.5299999999999727, 21.53], [-3.180000000000007, 21.68], [-3.0299999999999727, 22.03], [-2.680000000000007, 22.18], [-2.5299999999999727, 22.53], [-2.0, 22.75], [-1.75, 22.65], [-1.5, 22.75], [-0.9700000000000273, 22.53], [-0.8199999999999932, 22.18], [-0.4700000000000273, 22.03], [-0.3199999999999932, 21.68], [-0.25, 21.65], [0.0, 21.75], [0.5299999999999727, 21.53], [0.6800000000000068, 21.18], [0.75, 21.15], [1.0, 21.25], [1.25, 21.15], [1.5, 21.25], [2.0299999999999727, 21.03], [2.25, 20.5], [2.0299999999999727, 19.97], [1.5, 19.75], [1.25, 19.85], [1.1800000000000068, 19.82], [1.0299999999999727, 19.47], [0.5, 19.25], [0.25, 19.35], [0.0, 19.25], [-0.25, 19.35], [-0.3199999999999932, 19.32], [-0.4700000000000273, 18.97], [-1.0, 18.75], [-1.25, 18.85], [-1.5, 18.75], [-1.75, 18.85], [-2.0, 18.75], [-2.5299999999999727, 18.97], [-2.680000000000007, 19.32], [-2.75, 19.35], [-3.0, 19.25], [-3.5299999999999727, 19.47], [-3.680000000000007, 19.82], [-4.029999999999973, 19.97]]]]}, "2025-07-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.029999999999973, 19.97], [-4.25, 20.5], [-4.029999999999973, 21.03], [-3.680000000000007, 21.18], [-3.5299999999999727, 21.53], [-3.180000000000007, 21.68], [-3.0299999999999727, 22.03], [-2.680000000000007, 22.18], [-2.5299999999999727, 22.53], [-2.0, 22.75], [-1.75, 22.65], [-1.5, 22.75], [-0.9700000000000273, 22.53], [-0.8199999999999932, 22.18], [-0.4700000000000273, 22.03], [-0.3199999999999932, 21.68], [-0.25, 21.65], [0.0, 21.75], [0.5299999999999727, 21.53], [0.6800000000000068, 21.18], [0.75, 21.15], [1.0, 21.25], [1.25, 21.15], [1.5, 21.25], [2.0299999999999727, 21.03], [2.25, 20.5], [2.0299999999999727, 19.97], [1.5, 19.75], [1.25, 19.85], [1.1800000000000068, 19.82], [1.0299999999999727, 19.47], [0.5, 19.25], [0.25, 19.35], [0.0, 19.25], [-0.25, 19.35], [-0.3199999999999932, 19.32], [-0.4700000000000273, 18.97], [-1.0, 18.75], [-1.25, 18.85], [-1.5, 18.75], [-1.75, 18.85], [-2.0, 18.75], [-2.5299999999999727, 18.97], [-2.680000000000007, 19.32], [-2.75, 19.35], [-3.0, 19.25], [-3.5299999999999727, 19.47], [-3.680000000000007, 19.82], [-4.029999999999973, 19.97]]]]}, "2025-07-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.029999999999973, 19.97], [-4.25, 20.5], [-4.029999999999973, 21.03], [-3.680000000000007, 21.18], [-3.5299999999999727, 21.53], [-3.180000000000007, 21.68], [-3.0299999999999727, 22.03], [-2.680000000000007, 22.18], [-2.5299999999999727, 22.53], [-2.0, 22.75], [-1.75, 22.65], [-1.5, 22.75], [-0.9700000000000273, 22.53], [-0.8199999999999932, 22.18], [-0.4700000000000273, 22.03], [-0.3199999999999932, 21.68], [-0.25, 21.65], [0.0, 21.75], [0.5299999999999727, 21.53], [0.6800000000000068, 21.18], [0.75, 21.15], [1.0, 21.25], [1.25, 21.15], [1.5, 21.25], [2.0299999999999727, 21.03], [2.25, 20.5], [2.0299999999999727, 19.97], [1.5, 19.75], [1.25, 19.85], [1.1800000000000068, 19.82], [1.0299999999999727, 19.47], [0.5, 19.25], [0.25, 19.35], [0.0, 19.25], [-0.25, 19.35], [-0.3199999999999932, 19.32], [-0.4700000000000273, 18.97], [-1.0, 18.75], [-1.25, 18.85], [-1.5, 18.75], [-1.75, 18.85], [-2.0, 18.75], [-2.5299999999999727, 18.97], [-2.680000000000007, 19.32], [-2.75, 19.35], [-3.0, 19.25], [-3.5299999999999727, 19.47], [-3.680000000000007, 19.82], [-4.029999999999973, 19.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.0152678644768685}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.9156434580050874}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [33.46983144850964, 32.498438953218056, 34.20168566022602]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [30.58542912801107, 31.318210856119833, 33.10277964274093]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.777327755177264, -3.8106815581552786, -2.158921060682719]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.0152678644768685, -4.36844788409195, -2.8610813467797698]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.102617149122261, -2.957317728927221, -1.7171696005533887]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.488762292120198, -3.566293446633134, -2.4525302652131495]}}