{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:57:19.746019", "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-Sep-30_to_2014-Oct-03_4.5_8.0"}, "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": 2014090001106}, "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": "September 30 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 03 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": 60998.49082134674}, "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": ["Nigeria"]}, "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": 8.0}, "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": 4.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "4.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 2.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 6.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 7.75}, "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": {"2014-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.25, 9.0], [2.47, 9.53], [3.0, 9.75], [3.25, 9.65], [3.5, 9.75], [3.75, 9.65], [3.82, 9.68], [3.97, 10.03], [4.5, 10.25], [4.8, 10.13], [4.85, 10.25], [4.75, 10.5], [4.85, 10.75], [4.75, 11.0], [4.97, 11.53], [5.5, 11.75], [6.03, 11.53], [6.18, 11.18], [6.53, 11.03], [6.68, 10.68], [7.03, 10.53], [7.25, 10.0], [7.15, 9.75], [7.25, 9.5], [7.03, 8.97], [6.5, 8.75], [6.25, 8.85], [6.0, 8.75], [5.75, 8.85], [5.68, 8.82], [5.65, 8.75], [5.75, 8.5], [5.53, 7.97], [5.18, 7.82], [5.03, 7.47], [4.5, 7.25], [4.25, 7.35], [4.0, 7.25], [3.47, 7.47], [3.32, 7.82], [2.97, 7.97], [2.82, 8.32], [2.47, 8.47], [2.25, 9.0]]]]}, "2014-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.25, 9.0], [2.47, 9.53], [3.0, 9.75], [3.25, 9.65], [3.5, 9.75], [3.75, 9.65], [3.82, 9.68], [3.97, 10.03], [4.5, 10.25], [4.8, 10.13], [4.85, 10.25], [4.75, 10.5], [4.85, 10.75], [4.75, 11.0], [4.97, 11.53], [5.5, 11.75], [6.03, 11.53], [6.18, 11.18], [6.53, 11.03], [6.68, 10.68], [7.03, 10.53], [7.25, 10.0], [7.15, 9.75], [7.25, 9.5], [7.03, 8.97], [6.5, 8.75], [6.25, 8.85], [6.0, 8.75], [5.75, 8.85], [5.68, 8.82], [5.65, 8.75], [5.75, 8.5], [5.53, 7.97], [5.18, 7.82], [5.03, 7.47], [4.5, 7.25], [4.25, 7.35], [4.0, 7.25], [3.47, 7.47], [3.32, 7.82], [2.97, 7.97], [2.82, 8.32], [2.47, 8.47], [2.25, 9.0]]]]}, "2014-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.25, 9.0], [2.47, 9.53], [3.0, 9.75], [3.25, 9.65], [3.5, 9.75], [3.75, 9.65], [3.82, 9.68], [3.97, 10.03], [4.5, 10.25], [4.8, 10.13], [4.85, 10.25], [4.75, 10.5], [4.85, 10.75], [4.75, 11.0], [4.97, 11.53], [5.5, 11.75], [6.03, 11.53], [6.18, 11.18], [6.53, 11.03], [6.68, 10.68], [7.03, 10.53], [7.25, 10.0], [7.15, 9.75], [7.25, 9.5], [7.03, 8.97], [6.5, 8.75], [6.25, 8.85], [6.0, 8.75], [5.75, 8.85], [5.68, 8.82], [5.65, 8.75], [5.75, 8.5], [5.53, 7.97], [5.18, 7.82], [5.03, 7.47], [4.5, 7.25], [4.25, 7.35], [4.0, 7.25], [3.47, 7.47], [3.32, 7.82], [2.97, 7.97], [2.82, 8.32], [2.47, 8.47], [2.25, 9.0]]]]}, "2014-10-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.25, 9.0], [2.47, 9.53], [3.0, 9.75], [3.25, 9.65], [3.5, 9.75], [3.75, 9.65], [3.82, 9.68], [3.97, 10.03], [4.5, 10.25], [5.0, 10.04], [5.5, 10.25], [6.03, 10.03], [6.25, 9.5], [6.03, 8.97], [5.68, 8.82], [5.65, 8.75], [5.75, 8.5], [5.53, 7.97], [5.18, 7.82], [5.03, 7.47], [4.5, 7.25], [4.25, 7.35], [4.0, 7.25], [3.47, 7.47], [3.32, 7.82], [2.97, 7.97], [2.82, 8.32], [2.47, 8.47], [2.25, 9.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.2355887960759446}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5095464191256742}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.947604778753714, 24.259850352367607, 24.433861473933575, 24.127100331375516]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.617843594431577, 22.80452859161477, 23.24708456919052, 23.09667591702521]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.77417021396503, -1.469283043363518, -1.3247957538418889, -1.4435301628033177]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.2355887960759446, -1.8105244591757241, -1.5262055566014965, -1.8389052739375416]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.107908255225142, -1.7317105928085226, -1.5440712095313511, -1.7516995572843832]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5665843771626062, -2.1758304311214283, -1.9395716891166568, -2.13078237775579]}}