{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:22.065174", "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-Aug-28_to_2022-Aug-30_0.5_21.0"}, "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": 2022080001204}, "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": "August 28 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 30 2022"}, "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": 103244.73859426967}, "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": 21.0}, "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": 0.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "0.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -2.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 3.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-2.75, 22.5], [-2.53, 23.03], [-2.0, 23.25], [-1.75, 23.15], [-1.5, 23.25], [-1.25, 23.15], [-1.0, 23.25], [-0.75, 23.15], [-0.5, 23.25], [-0.25, 23.15], [0.0, 23.25], [0.25, 23.15], [0.5, 23.25], [0.75, 23.15], [0.82, 23.18], [0.97, 23.53], [1.5, 23.75], [1.75, 23.65], [1.82, 23.68], [1.97, 24.03], [2.32, 24.18], [2.47, 24.53], [3.0, 24.75], [3.53, 24.53], [3.75, 24.0], [3.53, 23.47], [3.18, 23.32], [3.04, 23.0], [3.18, 22.68], [3.53, 22.53], [3.75, 22.0], [3.53, 21.47], [3.18, 21.32], [3.03, 20.97], [2.5, 20.75], [2.25, 20.85], [2.13, 20.8], [2.25, 20.5], [2.03, 19.97], [1.5, 19.75], [1.25, 19.85], [1.0, 19.75], [0.75, 19.85], [0.5, 19.75], [0.25, 19.85], [0.0, 19.75], [-0.25, 19.85], [-0.5, 19.75], [-1.03, 19.97], [-1.25, 20.5], [-1.15, 20.75], [-1.25, 21.0], [-1.15, 21.25], [-1.25, 21.5], [-1.15, 21.75], [-1.18, 21.82], [-1.25, 21.85], [-1.5, 21.75], [-1.75, 21.85], [-2.0, 21.75], [-2.53, 21.97], [-2.75, 22.5]]]]}}, "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": {"2022-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.0, 21.75], [-2.53, 21.97], [-2.75, 22.5], [-2.53, 23.03], [-2.0, 23.25], [-1.75, 23.15], [-1.5, 23.25], [-1.25, 23.15], [-1.0, 23.25], [-0.75, 23.15], [-0.5, 23.25], [-0.25, 23.15], [0.0, 23.25], [0.25, 23.15], [0.5, 23.25], [0.75, 23.15], [0.82, 23.18], [0.97, 23.53], [1.5, 23.75], [1.75, 23.65], [1.82, 23.68], [1.97, 24.03], [2.32, 24.18], [2.47, 24.53], [3.0, 24.75], [3.53, 24.53], [3.75, 24.0], [3.53, 23.47], [3.18, 23.32], [3.04, 23.0], [3.18, 22.68], [3.53, 22.53], [3.75, 22.0], [3.53, 21.47], [3.18, 21.32], [3.03, 20.97], [2.5, 20.75], [2.25, 20.85], [2.13, 20.8], [2.25, 20.5], [2.03, 19.97], [1.5, 19.75], [1.25, 19.85], [1.0, 19.75], [0.75, 19.85], [0.5, 19.75], [0.25, 19.85], [0.0, 19.75], [-0.25, 19.85], [-0.5, 19.75], [-1.03, 19.97], [-1.25, 20.5], [-1.15, 20.75], [-1.25, 21.0], [-1.15, 21.25], [-1.25, 21.5], [-1.15, 21.75], [-1.18, 21.82], [-1.25, 21.85], [-1.5, 21.75], [-1.75, 21.85], [-2.0, 21.75]]]]}, "2022-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.0, 21.75], [-2.53, 21.97], [-2.75, 22.5], [-2.53, 23.03], [-2.0, 23.25], [-1.75, 23.15], [-1.5, 23.25], [-1.25, 23.15], [-1.0, 23.25], [-0.75, 23.15], [-0.5, 23.25], [-0.25, 23.15], [0.0, 23.25], [0.25, 23.15], [0.5, 23.25], [0.75, 23.15], [0.82, 23.18], [0.97, 23.53], [1.5, 23.75], [1.75, 23.65], [1.82, 23.68], [1.97, 24.03], [2.32, 24.18], [2.47, 24.53], [3.0, 24.75], [3.53, 24.53], [3.75, 24.0], [3.53, 23.47], [3.18, 23.32], [3.04, 23.0], [3.18, 22.68], [3.53, 22.53], [3.75, 22.0], [3.53, 21.47], [3.18, 21.32], [3.03, 20.97], [2.5, 20.75], [2.25, 20.85], [2.13, 20.8], [2.25, 20.5], [2.03, 19.97], [1.5, 19.75], [1.25, 19.85], [1.0, 19.75], [0.75, 19.85], [0.5, 19.75], [0.25, 19.85], [0.0, 19.75], [-0.25, 19.85], [-0.5, 19.75], [-1.03, 19.97], [-1.25, 20.5], [-1.15, 20.75], [-1.25, 21.0], [-1.15, 21.25], [-1.25, 21.5], [-1.15, 21.75], [-1.18, 21.82], [-1.25, 21.85], [-1.5, 21.75], [-1.75, 21.85], [-2.0, 21.75]]]]}, "2022-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.0, 21.75], [-2.53, 21.97], [-2.75, 22.5], [-2.53, 23.03], [-2.0, 23.25], [-1.75, 23.15], [-1.5, 23.25], [-1.25, 23.15], [-1.0, 23.25], [-0.75, 23.15], [-0.5, 23.25], [-0.25, 23.15], [0.0, 23.25], [0.25, 23.15], [0.5, 23.25], [0.75, 23.15], [0.82, 23.18], [0.97, 23.53], [1.5, 23.75], [1.75, 23.65], [1.82, 23.68], [1.97, 24.03], [2.32, 24.18], [2.47, 24.53], [3.0, 24.75], [3.53, 24.53], [3.75, 24.0], [3.53, 23.47], [3.18, 23.32], [3.04, 23.0], [3.18, 22.68], [3.53, 22.53], [3.75, 22.0], [3.53, 21.47], [3.18, 21.32], [3.03, 20.97], [2.5, 20.75], [2.25, 20.85], [2.13, 20.8], [2.25, 20.5], [2.03, 19.97], [1.5, 19.75], [1.25, 19.85], [1.0, 19.75], [0.75, 19.85], [0.5, 19.75], [0.25, 19.85], [0.0, 19.75], [-0.25, 19.85], [-0.5, 19.75], [-1.03, 19.97], [-1.25, 20.5], [-1.15, 20.75], [-1.25, 21.0], [-1.15, 21.25], [-1.25, 21.5], [-1.15, 21.75], [-1.18, 21.82], [-1.25, 21.85], [-1.5, 21.75], [-1.75, 21.85], [-2.0, 21.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.799000437621942}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.8126809596092035}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [31.55633156418594, 32.31109687298289, 33.095742364612875]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.06017054711964, 29.798141296956373, 30.81159886517088]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.5743552522435533, -2.8320867715081226, -2.031600855075934]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.799000437621942, -4.478989629320324, -3.6893504977817884]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.540456643194862, -2.1216397434680836, -1.5686448412679488]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.1916001354520285, -2.9040954583674985, -2.224088210010162]}}