{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:27.616148", "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": "2015-Jul-31_to_2015-Aug-02_19.5_-22.0"}, "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": 2015070001307}, "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 31 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 02 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 103150.24627675829}, "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": ["Botswana", "Namibia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-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": -22.0}, "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": 19.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "19.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 18.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 24.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -20.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.25, -21.5], [18.47, -20.97], [19.0, -20.75], [19.25, -20.85], [19.5, -20.75], [19.75, -20.85], [20.0, -20.75], [20.25, -20.85], [20.32, -20.82], [20.47, -20.47], [21.0, -20.25], [21.25, -20.35], [21.5, -20.25], [21.75, -20.35], [22.0, -20.25], [22.53, -20.47], [22.68, -20.82], [22.75, -20.85], [23.0, -20.75], [23.5, -20.96], [24.0, -20.75], [24.53, -20.97], [24.75, -21.5], [24.65, -21.75], [24.75, -22.0], [24.53, -22.53], [24.18, -22.68], [24.15, -22.75], [24.25, -23.0], [24.03, -23.53], [23.5, -23.75], [23.25, -23.65], [23.0, -23.75], [22.75, -23.65], [22.5, -23.75], [22.25, -23.65], [22.0, -23.75], [21.75, -23.65], [21.5, -23.75], [20.97, -23.53], [20.82, -23.18], [20.75, -23.15], [20.5, -23.25], [20.25, -23.15], [20.0, -23.25], [19.47, -23.03], [19.32, -22.68], [18.97, -22.53], [18.82, -22.18], [18.47, -22.03], [18.25, -21.5]]]]}, "2015-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.25, -21.5], [18.47, -20.97], [19.0, -20.75], [19.25, -20.85], [19.5, -20.75], [19.75, -20.85], [20.0, -20.75], [20.25, -20.85], [20.32, -20.82], [20.47, -20.47], [21.0, -20.25], [21.25, -20.35], [21.5, -20.25], [21.75, -20.35], [22.0, -20.25], [22.53, -20.47], [22.68, -20.82], [22.75, -20.85], [23.0, -20.75], [23.5, -20.96], [24.0, -20.75], [24.53, -20.97], [24.75, -21.5], [24.65, -21.75], [24.75, -22.0], [24.53, -22.53], [24.18, -22.68], [24.15, -22.75], [24.25, -23.0], [24.03, -23.53], [23.5, -23.75], [23.25, -23.65], [23.0, -23.75], [22.75, -23.65], [22.5, -23.75], [22.25, -23.65], [22.0, -23.75], [21.75, -23.65], [21.5, -23.75], [20.97, -23.53], [20.82, -23.18], [20.75, -23.15], [20.5, -23.25], [20.25, -23.15], [20.0, -23.25], [19.47, -23.03], [19.32, -22.68], [18.97, -22.53], [18.82, -22.18], [18.47, -22.03], [18.25, -21.5]]]]}, "2015-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.25, -21.5], [18.47, -20.97], [19.0, -20.75], [19.25, -20.85], [19.5, -20.75], [19.75, -20.85], [20.0, -20.75], [20.25, -20.85], [20.32, -20.82], [20.47, -20.47], [21.0, -20.25], [21.25, -20.35], [21.5, -20.25], [21.75, -20.35], [22.0, -20.25], [22.53, -20.47], [22.68, -20.82], [22.75, -20.85], [23.0, -20.75], [23.5, -20.96], [24.0, -20.75], [24.53, -20.97], [24.75, -21.5], [24.65, -21.75], [24.75, -22.0], [24.53, -22.53], [24.18, -22.68], [24.15, -22.75], [24.25, -23.0], [24.03, -23.53], [23.5, -23.75], [23.25, -23.65], [23.0, -23.75], [22.75, -23.65], [22.5, -23.75], [22.25, -23.65], [22.0, -23.75], [21.75, -23.65], [21.5, -23.75], [20.97, -23.53], [20.82, -23.18], [20.75, -23.15], [20.5, -23.25], [20.25, -23.15], [20.0, -23.25], [19.47, -23.03], [19.32, -22.68], [18.97, -22.53], [18.82, -22.18], [18.47, -22.03], [18.25, -21.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.540144179467518}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.113066312315912}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.557961298979023, 11.225689537508401, 12.389539765413133]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.430101730945978, 9.378915059562303, 10.74105157184357]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.995382706455819, -4.638278327060053, -3.7055379034318623]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.963528613454059, -5.540144179467518, -4.4089185081131745]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6252961788850144, -1.9219270928110115, -1.5610648751701477]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8857921609398056, -2.1205459259811823, -1.903993650369579]}}