{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:27.101243", "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": "2012-Sep-28_to_2012-Sep-30_23.0_-24.0"}, "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": 2012090001028}, "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 28 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 30 2012"}, "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": 99642.32670197781}, "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": -24.0}, "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": 23.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "23.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 24.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, -21.47], [19.5, -21.25], [19.75, -21.35], [20.0, -21.25], [20.25, -21.35], [20.32, -21.32], [20.47, -20.97], [21.0, -20.75], [21.53, -20.97], [21.68, -21.32], [21.75, -21.35], [22.0, -21.25], [22.25, -21.35], [22.5, -21.25], [23.03, -21.47], [23.18, -21.82], [23.53, -21.97], [23.68, -22.32], [23.75, -22.35], [24.0, -22.25], [24.53, -22.47], [24.68, -22.82], [25.03, -22.97], [25.25, -23.5], [25.15, -23.75], [25.25, -24.0], [25.03, -24.53], [24.5, -24.75], [24.25, -24.65], [24.0, -24.75], [23.75, -24.65], [23.5, -24.75], [23.25, -24.65], [23.0, -24.75], [22.5, -24.54], [22.0, -24.75], [21.75, -24.65], [21.5, -24.75], [20.97, -24.53], [20.75, -24.0], [20.85, -23.75], [20.82, -23.68], [20.47, -23.53], [20.32, -23.18], [20.25, -23.15], [20.0, -23.25], [19.75, -23.15], [19.5, -23.25], [18.97, -23.03], [18.75, -22.5], [18.85, -22.25], [18.75, -22.0], [18.97, -21.47]]]]}, "2012-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, -21.47], [19.5, -21.25], [19.75, -21.35], [20.0, -21.25], [20.25, -21.35], [20.32, -21.32], [20.47, -20.97], [21.0, -20.75], [21.53, -20.97], [21.68, -21.32], [21.75, -21.35], [22.0, -21.25], [22.25, -21.35], [22.5, -21.25], [23.03, -21.47], [23.18, -21.82], [23.53, -21.97], [23.68, -22.32], [23.75, -22.35], [24.0, -22.25], [24.53, -22.47], [24.68, -22.82], [25.03, -22.97], [25.25, -23.5], [25.15, -23.75], [25.25, -24.0], [25.03, -24.53], [24.5, -24.75], [24.25, -24.65], [24.0, -24.75], [23.75, -24.65], [23.5, -24.75], [23.25, -24.65], [23.0, -24.75], [22.5, -24.54], [22.0, -24.75], [21.75, -24.65], [21.5, -24.75], [20.97, -24.53], [20.75, -24.0], [20.85, -23.75], [20.82, -23.68], [20.47, -23.53], [20.32, -23.18], [20.25, -23.15], [20.0, -23.25], [19.75, -23.15], [19.5, -23.25], [18.97, -23.03], [18.75, -22.5], [18.85, -22.25], [18.75, -22.0], [18.97, -21.47]]]]}, "2012-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, -21.47], [19.5, -21.25], [19.75, -21.35], [20.0, -21.25], [20.25, -21.35], [20.32, -21.32], [20.47, -20.97], [21.0, -20.75], [21.53, -20.97], [21.68, -21.32], [21.75, -21.35], [22.0, -21.25], [22.25, -21.35], [22.5, -21.25], [23.03, -21.47], [23.18, -21.82], [23.53, -21.97], [23.68, -22.32], [23.75, -22.35], [24.0, -22.25], [24.53, -22.47], [24.68, -22.82], [25.03, -22.97], [25.25, -23.5], [25.15, -23.75], [25.25, -24.0], [25.03, -24.53], [24.5, -24.75], [24.25, -24.65], [24.0, -24.75], [23.75, -24.65], [23.5, -24.75], [23.25, -24.65], [23.0, -24.75], [22.5, -24.54], [22.0, -24.75], [21.75, -24.65], [21.5, -24.75], [20.97, -24.53], [20.75, -24.0], [20.85, -23.75], [20.82, -23.68], [20.47, -23.53], [20.32, -23.18], [20.25, -23.15], [20.0, -23.25], [19.75, -23.15], [19.5, -23.25], [18.97, -23.03], [18.75, -22.5], [18.85, -22.25], [18.75, -22.0], [18.97, -21.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.048460361508432}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.130123829572823}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.23139047318773, 14.993264396142308, 18.60566057262139]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.422084535005638, 13.117369713640016, 16.70340422394173]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.760517828300522, -8.000053122296237, -4.629800538121707]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.498269436854173, -9.048460361508432, -5.686655089285637]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9205595160807634, -2.713399801371544, -1.6279934842887152]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4594562192695477, -3.027719222538901, -1.9611992621436602]}}