{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:24:28.611168", "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-Nov-15_to_2022-Nov-18_0.5_12.5"}, "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": 2022110000606}, "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 15 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 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": 63440.327998206616}, "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": ["Benin", "Burkina Faso", "Niger", "Nigeria"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "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": 12.5}, "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": 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": 0.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 4.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[1.0, 13.25], [1.25, 13.15], [1.5, 13.25], [1.75, 13.15], [2.0, 13.25], [2.25, 13.15], [2.5, 13.25], [2.75, 13.15], [2.82, 13.18], [2.97, 13.53], [3.5, 13.75], [3.75, 13.65], [3.82, 13.68], [3.97, 14.03], [4.5, 14.25], [5.03, 14.03], [5.25, 13.5], [5.03, 12.97], [4.68, 12.82], [4.53, 12.47], [4.18, 12.32], [4.03, 11.97], [3.68, 11.82], [3.65, 11.75], [3.75, 11.5], [3.53, 10.97], [3.0, 10.75], [2.75, 10.85], [2.5, 10.75], [2.25, 10.85], [2.0, 10.75], [1.75, 10.85], [1.5, 10.75], [1.25, 10.85], [1.0, 10.75], [0.47, 10.97], [0.32, 11.32], [-0.03, 11.47], [-0.25, 12.0], [-0.15, 12.25], [-0.25, 12.5], [-0.03, 13.03], [0.5, 13.25], [0.75, 13.15], [1.0, 13.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-11-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.25, 12.5], [-0.03, 13.03], [0.5, 13.25], [0.75, 13.15], [1.0, 13.25], [1.25, 13.15], [1.5, 13.25], [1.75, 13.15], [2.0, 13.25], [2.25, 13.15], [2.5, 13.25], [2.75, 13.15], [2.82, 13.18], [2.97, 13.53], [3.5, 13.75], [3.75, 13.65], [3.82, 13.68], [3.97, 14.03], [4.5, 14.25], [5.03, 14.03], [5.25, 13.5], [5.03, 12.97], [4.68, 12.82], [4.53, 12.47], [4.18, 12.32], [4.03, 11.97], [3.68, 11.82], [3.65, 11.75], [3.75, 11.5], [3.53, 10.97], [3.0, 10.75], [2.75, 10.85], [2.5, 10.75], [2.25, 10.85], [2.0, 10.75], [1.75, 10.85], [1.5, 10.75], [1.25, 10.85], [1.0, 10.75], [0.47, 10.97], [0.32, 11.32], [-0.03, 11.47], [-0.25, 12.0], [-0.15, 12.25], [-0.25, 12.5]]]]}, "2022-11-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.25, 12.5], [-0.03, 13.03], [0.5, 13.25], [0.75, 13.15], [1.0, 13.25], [1.25, 13.15], [1.5, 13.25], [1.75, 13.15], [2.0, 13.25], [2.25, 13.15], [2.5, 13.25], [2.75, 13.15], [2.82, 13.18], [2.97, 13.53], [3.5, 13.75], [3.75, 13.65], [3.82, 13.68], [3.97, 14.03], [4.5, 14.25], [5.03, 14.03], [5.25, 13.5], [5.03, 12.97], [4.68, 12.82], [4.53, 12.47], [4.18, 12.32], [4.03, 11.97], [3.68, 11.82], [3.65, 11.75], [3.75, 11.5], [3.53, 10.97], [3.0, 10.75], [2.75, 10.85], [2.5, 10.75], [2.25, 10.85], [2.0, 10.75], [1.75, 10.85], [1.5, 10.75], [1.25, 10.85], [1.0, 10.75], [0.47, 10.97], [0.32, 11.32], [-0.03, 11.47], [-0.25, 12.0], [-0.15, 12.25], [-0.25, 12.5]]]]}, "2022-11-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.25, 12.5], [-0.03, 13.03], [0.5, 13.25], [0.75, 13.15], [1.0, 13.25], [1.25, 13.15], [1.5, 13.25], [1.75, 13.15], [2.0, 13.25], [2.25, 13.15], [2.5, 13.25], [2.75, 13.15], [2.82, 13.18], [2.97, 13.53], [3.5, 13.75], [3.75, 13.65], [3.82, 13.68], [3.97, 14.03], [4.5, 14.25], [5.03, 14.03], [5.25, 13.5], [5.03, 12.97], [4.68, 12.82], [4.53, 12.47], [4.18, 12.32], [4.03, 11.97], [3.68, 11.82], [3.65, 11.75], [3.75, 11.5], [3.53, 10.97], [3.0, 10.75], [2.75, 10.85], [2.5, 10.75], [2.25, 10.85], [2.0, 10.75], [1.75, 10.85], [1.5, 10.75], [1.25, 10.85], [1.0, 10.75], [0.47, 10.97], [0.32, 11.32], [-0.03, 11.47], [-0.25, 12.0], [-0.15, 12.25], [-0.25, 12.5]]]]}, "2022-11-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.03, 13.03], [0.5, 13.25], [1.03, 13.03], [1.25, 12.5], [1.03, 11.97], [0.5, 11.75], [-0.03, 11.97], [-0.25, 12.5], [-0.03, 13.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.0093120116764567}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1904316013832776}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.819715418967576, 26.000689197195925, 26.41672095842523, 26.30662853679354]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.849787945294565, 25.09309555305066, 25.28289468003186, 26.30662853679354]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8400727968129982, -2.6029470952356335, -2.147121454406277, -1.7946542129766954]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.3297904207406646, -3.0093120116764567, -2.8704974399058187, -1.7946542129766954]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5757916488485517, -2.2343679950716684, -1.766820824573148, -1.3010673789439888]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8247035132924905, -2.502284866370435, -2.2141050996879503, -1.3010673789439888]}}