{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:57.521335", "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": "2011-Jul-25_to_2011-Jul-29_9.5_4.0"}, "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": 2011070001352}, "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 25 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 29 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 61637.10091074956}, "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": ["Cameroon", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "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": ["Gulf of Guinea"]}, "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": 4.0}, "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": 9.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "9.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 7.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 12.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 3.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 5.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.97, 5.03], [9.5, 5.25], [9.75, 5.15], [10.0, 5.25], [10.25, 5.15], [10.5, 5.25], [11.0, 5.04], [11.5, 5.25], [11.75, 5.15], [12.0, 5.25], [12.53, 5.03], [12.75, 4.5], [12.53, 3.97], [12.18, 3.82], [12.03, 3.47], [11.68, 3.32], [11.53, 2.97], [11.0, 2.75], [10.75, 2.85], [10.5, 2.75], [9.97, 2.97], [9.82, 3.32], [9.75, 3.35], [9.5, 3.25], [8.97, 3.47], [8.75, 4.0], [8.85, 4.25], [8.75, 4.5], [8.97, 5.03]]]]}, "2011-07-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.47, 5.53], [9.0, 5.75], [9.53, 5.53], [9.68, 5.18], [9.75, 5.15], [10.0, 5.25], [10.25, 5.15], [10.5, 5.25], [11.0, 5.04], [11.5, 5.25], [11.75, 5.15], [12.0, 5.25], [12.53, 5.03], [12.75, 4.5], [12.53, 3.97], [12.18, 3.82], [12.03, 3.47], [11.68, 3.32], [11.53, 2.97], [11.0, 2.75], [10.75, 2.85], [10.5, 2.75], [9.97, 2.97], [9.82, 3.32], [9.75, 3.35], [9.5, 3.25], [8.97, 3.47], [8.82, 3.82], [8.47, 3.97], [8.25, 4.5], [8.35, 4.75], [8.25, 5.0], [8.47, 5.53]]]]}, "2011-07-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.25, 5.5], [7.47, 6.03], [8.0, 6.25], [8.53, 6.03], [8.68, 5.68], [8.75, 5.65], [9.0, 5.75], [9.53, 5.53], [9.68, 5.18], [9.75, 5.15], [10.0, 5.25], [10.25, 5.15], [10.5, 5.25], [11.0, 5.04], [11.5, 5.25], [11.75, 5.15], [12.0, 5.25], [12.53, 5.03], [12.75, 4.5], [12.53, 3.97], [12.18, 3.82], [12.03, 3.47], [11.68, 3.32], [11.53, 2.97], [11.0, 2.75], [10.75, 2.85], [10.5, 2.75], [9.97, 2.97], [9.82, 3.32], [9.75, 3.35], [9.5, 3.25], [8.97, 3.47], [8.82, 3.82], [8.75, 3.85], [8.5, 3.75], [8.25, 3.85], [8.0, 3.75], [7.75, 3.85], [7.5, 3.75], [6.97, 3.97], [6.75, 4.5], [6.97, 5.03], [7.32, 5.18], [7.35, 5.25], [7.25, 5.5]]]]}, "2011-07-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.25, 5.5], [7.47, 6.03], [8.0, 6.25], [8.53, 6.03], [8.68, 5.68], [8.75, 5.65], [9.0, 5.75], [9.53, 5.53], [9.68, 5.18], [9.75, 5.15], [10.0, 5.25], [10.25, 5.15], [10.5, 5.25], [11.0, 5.04], [11.5, 5.25], [11.75, 5.15], [12.0, 5.25], [12.53, 5.03], [12.75, 4.5], [12.53, 3.97], [12.0, 3.75], [11.75, 3.85], [11.5, 3.75], [11.0, 3.96], [10.5, 3.75], [10.25, 3.85], [10.18, 3.82], [10.03, 3.47], [9.5, 3.25], [8.97, 3.47], [8.82, 3.82], [8.75, 3.85], [8.5, 3.75], [8.25, 3.85], [8.0, 3.75], [7.75, 3.85], [7.5, 3.75], [6.97, 3.97], [6.75, 4.5], [6.97, 5.03], [7.32, 5.18], [7.35, 5.25], [7.25, 5.5]]]]}, "2011-07-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.25, 5.5], [7.47, 6.03], [8.0, 6.25], [8.53, 6.03], [8.68, 5.68], [8.75, 5.65], [9.0, 5.75], [9.53, 5.53], [9.68, 5.18], [10.03, 5.03], [10.25, 4.5], [10.15, 4.25], [10.25, 4.0], [10.03, 3.47], [9.5, 3.25], [8.97, 3.47], [8.82, 3.82], [8.75, 3.85], [8.5, 3.75], [8.25, 3.85], [8.0, 3.75], [7.75, 3.85], [7.5, 3.75], [6.97, 3.97], [6.75, 4.5], [6.97, 5.03], [7.32, 5.18], [7.35, 5.25], [7.25, 5.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.90743323986527}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2414350300286774}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.89957028019768, 22.10652260458386, 22.43326752211692, 22.70604287912579, 23.169644512240325]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.380185636149463, 20.66059799398846, 20.207303955588202, 20.40453516862283, 21.35086796617037]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5046603395174571, -1.210589500831629, -1.2624982963989595, -1.1985679231610504, -0.9866358163921234]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8782285664904634, -1.433028171680803, -1.90743323986527, -1.681369857251923, -1.3527813864731684]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.951453049174334, -1.623688036123012, -1.8481655987635832, -1.889377736170094, -1.7892003872518196]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3579249869673853, -1.8046691228318197, -2.4038256065036196, -2.3622674666013523, -2.169827997760548]}}