{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:32:37.176127", "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-Oct-05_to_2022-Oct-08_2.5_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": 2022100000260}, "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": "October 05 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 08 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": 51373.89917538289}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "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": 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": 2.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "2.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 0.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 4.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 10.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-10-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.25, 12.0], [0.47, 12.53], [0.82, 12.68], [0.97, 13.03], [1.32, 13.18], [1.47, 13.53], [2.0, 13.75], [2.5, 13.54], [3.0, 13.75], [3.53, 13.53], [3.68, 13.18], [4.03, 13.03], [4.25, 12.5], [4.03, 11.97], [3.68, 11.82], [3.53, 11.47], [3.0, 11.25], [2.75, 11.35], [2.5, 11.25], [2.25, 11.35], [2.18, 11.32], [2.03, 10.97], [1.5, 10.75], [0.97, 10.97], [0.82, 11.32], [0.47, 11.47], [0.25, 12.0]]]]}, "2022-10-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.35, 11.25], [0.25, 11.5], [0.35, 11.75], [0.25, 12.0], [0.47, 12.53], [0.82, 12.68], [0.97, 13.03], [1.32, 13.18], [1.47, 13.53], [2.0, 13.75], [2.5, 13.54], [3.0, 13.75], [3.5, 13.54], [4.0, 13.75], [4.53, 13.53], [4.75, 13.0], [4.53, 12.47], [4.18, 12.32], [4.03, 11.97], [3.68, 11.82], [3.53, 11.47], [3.0, 11.25], [2.75, 11.35], [2.5, 11.25], [2.25, 11.35], [2.18, 11.32], [2.03, 10.97], [1.68, 10.82], [1.65, 10.75], [1.75, 10.5], [1.53, 9.97], [1.0, 9.75], [0.47, 9.97], [0.25, 10.5], [0.35, 10.75], [0.25, 11.0], [0.35, 11.25]]]]}, "2022-10-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.35, 11.25], [0.25, 11.5], [0.35, 11.75], [0.25, 12.0], [0.47, 12.53], [0.82, 12.68], [0.97, 13.03], [1.32, 13.18], [1.47, 13.53], [2.0, 13.75], [2.5, 13.54], [3.0, 13.75], [3.5, 13.54], [4.0, 13.75], [4.53, 13.53], [4.75, 13.0], [4.53, 12.47], [4.18, 12.32], [4.03, 11.97], [3.68, 11.82], [3.53, 11.47], [3.0, 11.25], [2.75, 11.35], [2.5, 11.25], [2.25, 11.35], [2.18, 11.32], [2.03, 10.97], [1.68, 10.82], [1.65, 10.75], [1.75, 10.5], [1.53, 9.97], [1.0, 9.75], [0.47, 9.97], [0.25, 10.5], [0.35, 10.75], [0.25, 11.0], [0.35, 11.25]]]]}, "2022-10-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.25, 11.5], [0.47, 12.03], [0.82, 12.18], [0.97, 12.53], [1.5, 12.75], [1.8, 12.63], [1.97, 13.03], [2.5, 13.25], [3.03, 13.03], [3.25, 12.5], [3.03, 11.97], [2.5, 11.75], [2.2, 11.88], [2.15, 11.75], [2.25, 11.5], [2.03, 10.97], [1.68, 10.82], [1.65, 10.75], [1.75, 10.5], [1.53, 9.97], [1.0, 9.75], [0.47, 9.97], [0.25, 10.5], [0.35, 10.75], [0.25, 11.0], [0.35, 11.25], [0.25, 11.5]]], [[[3.47, 12.47], [3.25, 13.0], [3.47, 13.53], [4.0, 13.75], [4.53, 13.53], [4.75, 13.0], [4.53, 12.47], [4.0, 12.25], [3.47, 12.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.966685292616546}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.2591227057347405}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.976160733934137, 26.43049793550881, 26.63840206529727, 26.60186840008737]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.14256643629102, 24.327853498641844, 25.113581228192913, 25.211294204126204]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.122503135952041, -2.474333741678877, -2.314829679904228, -1.8549010250552393]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6335338828071144, -2.924234808192466, -2.966685292616546, -2.066691743152262]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6182552925467228, -1.9731728760892253, -1.8150671232037587, -1.5353901882709675]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9586053470622036, -2.5929040553837055, -2.2160667150751343, -1.599053889095158]}}