{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:01.612011", "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": "2013-Apr-15_to_2013-Apr-19_12.0_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": 2013040000555}, "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": "April 15 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 19 2013"}, "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": 93464.75692454385}, "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": ["Niger", "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": []}, "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": 12.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "12.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 9.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 13.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 14.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.75, 12.0], [9.97, 12.53], [10.5, 12.75], [10.8, 12.63], [10.97, 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[9.47, 11.47], [9.25, 12.0], [9.35, 12.25], [9.25, 12.5], [9.47, 13.03]]]]}, "2013-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.47, 13.03], [10.0, 13.25], [10.25, 13.15], [10.5, 13.25], [10.8, 13.13], [10.97, 13.53], [11.32, 13.68], [11.35, 13.75], [11.25, 14.0], [11.47, 14.53], [11.82, 14.68], [11.97, 15.03], [12.5, 15.25], [12.75, 15.15], [13.0, 15.25], [13.53, 15.03], [13.75, 14.5], [13.65, 14.25], [13.75, 14.0], [13.65, 13.75], [13.68, 13.68], [14.03, 13.53], [14.25, 13.0], [14.15, 12.75], [14.25, 12.5], [14.15, 12.25], [14.25, 12.0], [14.15, 11.75], [14.25, 11.5], [14.03, 10.97], [13.5, 10.75], [12.97, 10.97], [12.82, 11.32], [12.5, 11.46], [12.18, 11.32], [12.03, 10.97], [11.5, 10.75], [11.25, 10.85], [11.0, 10.75], [10.75, 10.85], [10.5, 10.75], [9.97, 10.97], [9.82, 11.32], [9.47, 11.47], [9.25, 12.0], [9.35, 12.25], [9.25, 12.5], [9.47, 13.03]]]]}, "2013-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.25, 12.5], [9.47, 13.03], [10.0, 13.25], [10.25, 13.15], [10.5, 13.25], [11.0, 13.04], [11.5, 13.25], [11.75, 13.15], [11.88, 13.2], [11.75, 13.5], [11.97, 14.03], [12.5, 14.25], [12.75, 14.15], [13.0, 14.25], [13.53, 14.03], [13.68, 13.68], [14.03, 13.53], [14.25, 13.0], [14.15, 12.75], [14.25, 12.5], [14.15, 12.25], [14.25, 12.0], [14.03, 11.47], [13.5, 11.25], [13.25, 11.35], [13.0, 11.25], [12.5, 11.46], [12.0, 11.25], [11.7, 11.38], [11.53, 10.97], [11.0, 10.75], [10.47, 10.97], [10.32, 11.32], [9.97, 11.47], [9.82, 11.82], [9.47, 11.97], [9.25, 12.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.025634613475631}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.7428872826746455}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.05021520503476, 29.885112600997786, 29.665638504426397, 30.194066071507393, 30.68835671267658]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.88804066441935, 28.75906768285887, 27.461751221279712, 29.124376181432183, 29.5862419924037]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.274163589472399, -2.739296181894722, -3.0878173481518583, -2.696524742400056, -2.3697872650140606]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.442624779313178, -3.2526973330832334, -4.025634613475631, -3.2622486927556906, -3.182819178814441]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5133268371571489, -1.6816239944379228, -1.9213402758803408, -1.7088241921717193, -1.60795021200384]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6243901032380212, -2.117529726496455, -2.614597864857833, -2.0810606380135828, -2.1093008432735307]}}