{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:30.948415", "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": "2024-Dec-30_to_2025-Jan-02_37.0_17.0"}, "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": 2024120000724}, "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": "December 30 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 02 2025"}, "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": 82640.1849403145}, "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": ["Eritrea", "Sudan"]}, "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": ["Red Sea"]}, "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": 17.0}, "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": 37.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "37.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 36.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 38.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 19.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[35.82, 16.68], [35.85, 16.75], [35.75, 17.0], [35.85, 17.25], [35.82, 17.32], [35.47, 17.47], [35.25, 18.0], [35.47, 18.53], [35.82, 18.68], [35.96, 19.0], [35.75, 19.5], [35.97, 20.03], [36.5, 20.25], [36.75, 20.15], [37.0, 20.25], [37.53, 20.03], [37.75, 19.5], [37.65, 19.25], [37.68, 19.18], [38.03, 19.03], [38.18, 18.68], [38.53, 18.53], [38.68, 18.18], [39.03, 18.03], [39.25, 17.5], [39.15, 17.25], [39.25, 17.0], [39.03, 16.47], [38.5, 16.25], [38.25, 16.35], [38.18, 16.32], [38.15, 16.25], [38.25, 16.0], [38.15, 15.75], [38.25, 15.5], [38.03, 14.97], [37.5, 14.75], [37.25, 14.85], [37.0, 14.75], [36.75, 14.85], [36.5, 14.75], [35.97, 14.97], [35.82, 15.32], [35.47, 15.47], [35.25, 16.0], [35.47, 16.53], [35.82, 16.68]]]]}}, "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": {"2024-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.5, 18.75], [35.97, 18.97], [35.75, 19.5], [35.97, 20.03], [36.5, 20.25], [36.75, 20.15], [37.0, 20.25], [37.53, 20.03], [37.75, 19.5], [37.53, 18.97], [37.0, 18.75], [36.75, 18.85], [36.5, 18.75]]]]}, "2024-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.47, 15.47], [35.25, 16.0], [35.47, 16.53], [35.82, 16.68], [35.85, 16.75], [35.75, 17.0], [35.85, 17.25], [35.82, 17.32], [35.47, 17.47], [35.25, 18.0], [35.47, 18.53], [35.82, 18.68], [35.96, 19.0], [35.75, 19.5], [35.97, 20.03], [36.5, 20.25], [36.75, 20.15], [37.0, 20.25], [37.53, 20.03], [37.75, 19.5], [37.65, 19.25], [37.68, 19.18], [38.03, 19.03], [38.18, 18.68], [38.53, 18.53], [38.68, 18.18], [39.03, 18.03], [39.25, 17.5], [39.15, 17.25], [39.25, 17.0], [39.03, 16.47], [38.5, 16.25], [38.25, 16.35], [38.18, 16.32], [38.15, 16.25], [38.25, 16.0], [38.15, 15.75], [38.25, 15.5], [38.03, 14.97], [37.5, 14.75], [37.25, 14.85], [37.0, 14.75], [36.75, 14.85], [36.5, 14.75], [35.97, 14.97], [35.82, 15.32], [35.47, 15.47]]]]}, "2025-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.47, 15.47], [35.25, 16.0], [35.47, 16.53], [35.82, 16.68], [35.85, 16.75], [35.75, 17.0], [35.85, 17.25], [35.82, 17.32], [35.47, 17.47], [35.25, 18.0], [35.47, 18.53], [35.82, 18.68], [35.96, 19.0], [35.75, 19.5], [35.97, 20.03], [36.5, 20.25], [36.75, 20.15], [37.0, 20.25], [37.53, 20.03], [37.75, 19.5], [37.65, 19.25], [37.68, 19.18], [38.03, 19.03], [38.18, 18.68], [38.53, 18.53], [38.68, 18.18], [39.03, 18.03], [39.25, 17.5], [39.15, 17.25], [39.25, 17.0], [39.03, 16.47], [38.5, 16.25], [38.25, 16.35], [38.18, 16.32], [38.15, 16.25], [38.25, 16.0], [38.15, 15.75], [38.25, 15.5], [38.03, 14.97], [37.5, 14.75], [37.25, 14.85], [37.0, 14.75], [36.75, 14.85], [36.5, 14.75], [35.97, 14.97], [35.82, 15.32], [35.47, 15.47]]]]}, "2025-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.47, 15.47], [35.25, 16.0], [35.47, 16.53], [35.82, 16.68], [35.85, 16.75], [35.75, 17.0], [35.85, 17.25], [35.82, 17.32], [35.47, 17.47], [35.25, 18.0], [35.47, 18.53], [35.82, 18.68], [35.97, 19.03], [36.32, 19.18], [36.47, 19.53], [37.0, 19.75], [37.53, 19.53], [37.68, 19.18], [38.03, 19.03], [38.18, 18.68], [38.53, 18.53], [38.68, 18.18], [39.03, 18.03], [39.25, 17.5], [39.15, 17.25], [39.25, 17.0], [39.03, 16.47], [38.5, 16.25], [38.25, 16.35], [38.18, 16.32], [38.15, 16.25], [38.25, 16.0], [38.15, 15.75], [38.25, 15.5], [38.03, 14.97], [37.5, 14.75], [37.25, 14.85], [37.0, 14.75], [36.75, 14.85], [36.5, 14.75], [35.97, 14.97], [35.82, 15.32], [35.47, 15.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.101055376157319}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.9194555075644293}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.37426020304366, 20.53639936901277, 19.921903955368748, 20.816603303567035]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.24303461710616, 15.556384023030603, 15.089846547444665, 16.120051320393884]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4599033635408034, -2.8302671496421175, -3.359550753125124, -2.5769059473402955]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.576880938598947, -3.91815098636971, -4.101055376157319, -2.921457054524751]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5683861114395523, -1.7462755276778257, -2.0940717347753735, -1.5681867762681887]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6321736129268967, -2.1606206605863196, -2.425088096577793, -1.7728078384403712]}}