{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:01:54.731290", "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": "2014-Dec-25_to_2014-Dec-28_1.0_7.5"}, "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": 2014120001071}, "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 25 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 28 2014"}, "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": 76281.00797000733}, "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", "Ghana", "Togo"]}, "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": 7.5}, "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": 1.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "1.0\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": 2.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 6.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 11.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.5, 9.25], [1.03, 9.03], [1.25, 8.5], [1.03, 7.97], [0.5, 7.75], [-0.03, 7.97], [-0.25, 8.5], [-0.03, 9.03], [0.5, 9.25]]]]}, "2014-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.18, 8.68], [-0.13, 8.8], [-0.53, 8.97], [-0.75, 9.5], [-0.65, 9.75], [-0.75, 10.0], [-0.65, 10.25], [-0.75, 10.5], [-0.65, 10.75], [-0.75, 11.0], [-0.53, 11.53], [0.0, 11.75], [0.53, 11.53], [0.68, 11.18], [0.75, 11.15], [1.0, 11.25], [1.25, 11.15], [1.5, 11.25], [2.03, 11.03], [2.2, 10.63], [2.5, 10.75], [3.03, 10.53], [3.25, 10.0], [3.03, 9.47], [2.68, 9.32], [2.65, 9.25], [2.75, 9.0], [2.65, 8.75], [2.75, 8.5], [2.65, 8.25], [2.75, 8.0], [2.65, 7.75], [2.75, 7.5], [2.53, 6.97], [2.0, 6.75], [1.7, 6.88], [1.53, 6.47], [1.0, 6.25], [0.47, 6.47], [0.25, 7.0], [0.35, 7.25], [0.32, 7.32], [0.25, 7.35], [0.18, 7.32], [0.03, 6.97], [-0.5, 6.75], [-1.03, 6.97], [-1.25, 7.5], [-1.03, 8.03], [-0.68, 8.18], [-0.53, 8.53], [-0.18, 8.68]], [[1.35, 8.25], [1.32, 8.32], [1.25, 8.35], [1.18, 8.32], [1.15, 8.25], [1.18, 8.18], [1.3, 8.13], [1.35, 8.25]]]]}, "2014-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.18, 8.68], [-0.13, 8.8], [-0.53, 8.97], [-0.75, 9.5], [-0.65, 9.75], [-0.75, 10.0], [-0.65, 10.25], [-0.75, 10.5], [-0.65, 10.75], [-0.75, 11.0], [-0.53, 11.53], [0.0, 11.75], [0.53, 11.53], [0.68, 11.18], [0.75, 11.15], [1.0, 11.25], [1.25, 11.15], [1.5, 11.25], [2.03, 11.03], [2.2, 10.63], [2.5, 10.75], [3.03, 10.53], [3.25, 10.0], [3.03, 9.47], [2.68, 9.32], [2.65, 9.25], [2.75, 9.0], [2.65, 8.75], [2.75, 8.5], [2.65, 8.25], [2.75, 8.0], [2.65, 7.75], [2.75, 7.5], [2.53, 6.97], [2.0, 6.75], [1.7, 6.88], [1.53, 6.47], [1.0, 6.25], [0.47, 6.47], [0.25, 7.0], [0.35, 7.25], [0.32, 7.32], [0.25, 7.35], [0.18, 7.32], [0.03, 6.97], [-0.5, 6.75], [-1.03, 6.97], [-1.25, 7.5], [-1.03, 8.03], [-0.68, 8.18], [-0.53, 8.53], [-0.18, 8.68]], [[1.35, 8.25], [1.32, 8.32], [1.25, 8.35], [1.18, 8.32], [1.15, 8.25], [1.18, 8.18], [1.3, 8.13], [1.35, 8.25]]]]}, "2014-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.0, 8.75], [-0.53, 8.97], [-0.75, 9.5], [-0.65, 9.75], [-0.75, 10.0], [-0.65, 10.25], [-0.75, 10.5], [-0.65, 10.75], [-0.75, 11.0], [-0.53, 11.53], [0.0, 11.75], [0.53, 11.53], [0.68, 11.18], [0.75, 11.15], [1.0, 11.25], [1.25, 11.15], [1.5, 11.25], [2.03, 11.03], [2.2, 10.63], [2.5, 10.75], [3.03, 10.53], [3.25, 10.0], [3.03, 9.47], [2.68, 9.32], [2.65, 9.25], [2.75, 9.0], [2.65, 8.75], [2.75, 8.5], [2.65, 8.25], [2.75, 8.0], [2.65, 7.75], [2.75, 7.5], [2.53, 6.97], [2.0, 6.75], [1.7, 6.88], [1.53, 6.47], [1.0, 6.25], [0.47, 6.47], [0.25, 7.0], [0.35, 7.25], [0.32, 7.32], [0.25, 7.35], [0.18, 7.32], [0.03, 6.97], [-0.5, 6.75], [-1.03, 6.97], [-1.25, 7.5], [-1.03, 8.03], [-0.68, 8.18], [-0.53, 8.53], [0.0, 8.75]], [[0.25, 8.65], [0.37, 8.7], [0.3, 8.88], [0.0, 8.75], [0.25, 8.65]], [[1.35, 8.25], [1.32, 8.32], [1.25, 8.35], [1.13, 8.3], [1.18, 8.18], [1.3, 8.13], [1.35, 8.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.822451135304618}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.935041403677764}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.023067024120053, 24.58455773641532, 24.33551728311744, 24.774640999300516]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.023067024120053, 23.02901813253925, 22.782852244578407, 22.96234820454987]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.604438910706051, -1.9266561150971528, -2.1666122864964588, -1.7163315135535815]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.604438910706051, -2.6948803661657053, -2.822451135304618, -2.203957273461924]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3926868000781256, -1.7007826622099702, -1.9453049166587402, -1.552488801791397]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3926868000781256, -2.3512147353382655, -2.6336717407274306, -2.067223872961552]}}