{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:10.160101", "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-12_to_2025-Jul-14_3.0_13.5"}, "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": 2025070000533}, "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 12 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 14 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": 96047.52826660483}, "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": ["Burkina Faso", "Mali", "Niger", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "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": 13.5}, "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": 3.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "3.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -3.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 4.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 15.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.53, 13.03], [-3.18, 13.18], [-3.15, 13.25], [-3.25, 13.5], 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[-2.35, 12.25], [-2.25, 12.0], [-2.47, 11.47], [-3.0, 11.25], [-3.53, 11.47], [-3.75, 12.0], [-3.65, 12.25], [-3.75, 12.5], [-3.53, 13.03]], [[1.85, 13.75], [1.82, 13.82], [1.75, 13.85], [1.68, 13.82], [1.65, 13.75], [1.75, 13.5], [1.85, 13.75]]]]}, "2025-07-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.53, 13.03], [-3.18, 13.18], [-3.15, 13.25], [-3.25, 13.5], [-3.15, 13.75], [-3.25, 14.0], [-3.03, 14.53], [-2.68, 14.68], [-2.53, 15.03], [-2.0, 15.25], [-1.75, 15.15], [-1.5, 15.25], [-1.25, 15.15], [-1.0, 15.25], [-0.75, 15.15], [-0.5, 15.25], [-0.25, 15.15], [0.0, 15.25], [0.25, 15.15], [0.5, 15.25], [0.75, 15.15], [0.82, 15.18], [0.97, 15.53], [1.5, 15.75], [2.03, 15.53], [2.18, 15.18], [2.53, 15.03], [2.68, 14.68], [2.75, 14.65], [3.0, 14.75], [3.25, 14.65], [3.5, 14.75], [4.03, 14.53], [4.18, 14.18], [4.25, 14.15], [4.5, 14.25], [5.03, 14.03], [5.25, 13.5], [5.03, 12.97], [4.68, 12.82], [4.53, 12.47], [4.0, 12.25], [3.75, 12.35], [3.5, 12.25], [3.25, 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[1.75, 13.5], [1.85, 13.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.6622026407300154}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.2625877989386614}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.588863627115927, 25.906001027425134, 27.39668426513674]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.23024139404299, 23.317525482177757, 25.410984293619833]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.423746342092821, -3.9913307002780325, -2.372686354445131]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.6622026407300154, -4.704133614670809, -3.142486540209859]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.286152954898541, -2.622530240594097, -1.5407290976667518]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.774378938586403, -3.2809061659370427, -1.8173782693967806]}}