{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:20.238393", "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-Apr-25_to_2011-Apr-28_11.5_16.0"}, "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": 2011040002544}, "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 25 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 28 2011"}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 59232.575623828074}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 16.0}, "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": 11.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "11.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 7.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 12.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.5, 17.75], [8.8, 17.63], [8.85, 17.75], [8.75, 18.0], [8.97, 18.53], [9.5, 18.75], [9.75, 18.65], [10.0, 18.75], [10.53, 18.53], [10.75, 18.0], [10.65, 17.75], [10.68, 17.68], [11.03, 17.53], [11.2, 17.13], [11.5, 17.25], [12.03, 17.03], [12.25, 16.5], [12.15, 16.25], [12.25, 16.0], [12.03, 15.47], [11.68, 15.32], [11.53, 14.97], [11.0, 14.75], [10.47, 14.97], [10.32, 15.32], [9.97, 15.47], [9.82, 15.82], [9.47, 15.97], [9.25, 16.5], [9.35, 16.75], [9.32, 16.82], [9.2, 16.88], [9.03, 16.47], [8.68, 16.32], [8.53, 15.97], [8.0, 15.75], [7.47, 15.97], [7.25, 16.5], [7.47, 17.03], [7.82, 17.18], [7.97, 17.53], [8.5, 17.75]]]]}, "2011-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.5, 17.75], [8.75, 17.65], [8.82, 17.68], [8.85, 17.75], [8.75, 18.0], [8.97, 18.53], [9.5, 18.75], [9.75, 18.65], [10.0, 18.75], [10.53, 18.53], [10.75, 18.0], [10.65, 17.75], [10.68, 17.68], [11.03, 17.53], [11.2, 17.13], [11.5, 17.25], [12.03, 17.03], [12.18, 16.68], [12.25, 16.65], [12.5, 16.75], [13.03, 16.53], [13.25, 16.0], [13.03, 15.47], [12.5, 15.25], [12.25, 15.35], [12.18, 15.32], [12.03, 14.97], [11.5, 14.75], [11.25, 14.85], [11.0, 14.75], [10.47, 14.97], [10.32, 15.32], [9.97, 15.47], [9.82, 15.82], [9.5, 15.96], [9.0, 15.75], [8.5, 15.96], [8.0, 15.75], [7.47, 15.97], [7.25, 16.5], [7.47, 17.03], [7.82, 17.18], [7.97, 17.53], [8.5, 17.75]]]]}, "2011-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.5, 17.75], [8.75, 17.65], [8.82, 17.68], [8.85, 17.75], [8.75, 18.0], [8.97, 18.53], [9.5, 18.75], [9.75, 18.65], [10.0, 18.75], [10.53, 18.53], [10.75, 18.0], [10.65, 17.75], [10.68, 17.68], [11.03, 17.53], [11.2, 17.13], [11.5, 17.25], [12.03, 17.03], [12.18, 16.68], [12.25, 16.65], [12.5, 16.75], [13.03, 16.53], [13.25, 16.0], [13.03, 15.47], [12.5, 15.25], [12.25, 15.35], [12.18, 15.32], [12.03, 14.97], [11.5, 14.75], [11.25, 14.85], [11.0, 14.75], [10.47, 14.97], [10.32, 15.32], [9.97, 15.47], [9.82, 15.82], [9.5, 15.96], [9.0, 15.75], [8.5, 15.96], [8.0, 15.75], [7.47, 15.97], [7.25, 16.5], [7.47, 17.03], [7.82, 17.18], [7.97, 17.53], [8.5, 17.75]]]]}, "2011-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.25, 16.65], [12.5, 16.75], [13.03, 16.53], [13.25, 16.0], [13.03, 15.47], [12.5, 15.25], [12.25, 15.35], [12.18, 15.32], [12.03, 14.97], [11.5, 14.75], [10.97, 14.97], [10.75, 15.5], [10.97, 16.03], [11.32, 16.18], [11.47, 16.53], [12.0, 16.75], [12.25, 16.65]]], [[[9.0, 17.75], [9.53, 17.53], [9.75, 17.0], [9.65, 16.75], [9.75, 16.5], [9.53, 15.97], [9.0, 15.75], [8.47, 15.97], [8.25, 16.5], [8.35, 16.75], [8.25, 17.0], [8.47, 17.53], [9.0, 17.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 4.543077582940384}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 3.0646176429497274}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [34.27262917638865, 34.55536686822609, 34.686808039499, 34.478758069488606]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [35.468544508995876, 36.116062667032395, 36.20382181659028, 34.972914264349754]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.9408702600998557, 3.1249309365960443, 3.175022297599662, 2.752987998314336]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.840652867547476, 4.543077582940384, 4.153391382413815, 3.0126645924871127]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3050473241525418, 1.3916058369292639, 1.408089437458884, 1.2900046384929906]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.7239891656497446, 1.975963295314836, 1.8410536867701233, 1.425115920684572]}}