{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:22:55.111888", "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": "2021-Jan-21_to_2021-Jan-24_14.0_-19.5"}, "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": 2021010000791}, "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": "January 21 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 24 2021"}, "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": 58525.67214600781}, "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": ["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": -19.5}, "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": 14.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "14.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 12.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 15.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.97, -18.47], [13.5, -18.25], [13.75, -18.35], [14.0, -18.25], [14.25, -18.35], [14.5, -18.25], [14.75, -18.35], [15.0, -18.25], [15.53, -18.47], [15.75, -19.0], [15.65, -19.25], [15.75, -19.5], [15.65, -19.75], [15.75, -20.0], [15.53, -20.53], [15.0, -20.75], [14.75, -20.65], [14.5, -20.75], [14.25, -20.65], [14.0, -20.75], [13.47, -20.53], [13.32, -20.18], [12.97, -20.03], [12.75, -19.5], [12.85, -19.25], [12.75, -19.0], [12.97, -18.47]]]]}, "2021-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.97, -16.97], [12.5, -16.75], [12.75, -16.85], [13.0, -16.75], [13.25, -16.85], [13.5, -16.75], [14.03, -16.97], [14.18, -17.32], [14.53, -17.47], [14.75, -18.0], [14.63, -18.3], [14.75, -18.35], [15.0, -18.25], [15.53, -18.47], [15.75, -19.0], [15.65, -19.25], [15.75, -19.5], [15.65, -19.75], [15.75, -20.0], [15.53, -20.53], [15.0, -20.75], [14.75, -20.65], [14.5, -20.75], [14.25, -20.65], [14.0, -20.75], [13.47, -20.53], [13.32, -20.18], [12.97, -20.03], [12.75, -19.5], [12.85, -19.25], [12.82, -19.18], [12.47, -19.03], [12.32, -18.68], [11.97, -18.53], [11.75, -18.0], [11.85, -17.75], [11.75, -17.5], [11.97, -16.97]]]]}, "2021-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.97, -16.97], [12.5, -16.75], [12.75, -16.85], [13.0, -16.75], [13.25, -16.85], [13.5, -16.75], [14.03, -16.97], [14.18, -17.32], [14.53, -17.47], [14.75, -18.0], [14.63, -18.3], [14.75, -18.35], [15.0, -18.25], [15.53, -18.47], [15.75, -19.0], [15.65, -19.25], [15.75, -19.5], [15.65, -19.75], [15.75, -20.0], [15.53, -20.53], [15.0, -20.75], [14.75, -20.65], [14.5, -20.75], [14.25, -20.65], [14.0, -20.75], [13.47, -20.53], [13.32, -20.18], [12.97, -20.03], [12.75, -19.5], [12.85, -19.25], [12.82, -19.18], [12.47, -19.03], [12.32, -18.68], [11.97, -18.53], [11.75, -18.0], [11.85, -17.75], [11.75, -17.5], [11.97, -16.97]]]]}, "2021-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.97, -16.97], [12.5, -16.75], [12.75, -16.85], [13.0, -16.75], [13.25, -16.85], [13.5, -16.75], [14.03, -16.97], [14.18, -17.32], [14.53, -17.47], [14.75, -18.0], [14.54, -18.5], [14.75, -19.0], [14.65, -19.25], [14.68, -19.32], [15.03, -19.47], [15.25, -20.0], [15.03, -20.53], [14.5, -20.75], [14.25, -20.65], [14.0, -20.75], [13.47, -20.53], [13.32, -20.18], [12.97, -20.03], [12.75, -19.5], [12.85, -19.25], [12.82, -19.18], [12.47, -19.03], [12.32, -18.68], [11.97, -18.53], [11.75, -18.0], [11.85, -17.75], [11.75, -17.5], [11.97, -16.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.207228906129217}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.8356320045161896}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.343431723038805, 19.94997996186771, 18.652035613117732, 20.147528702732302]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.187684640234522, 18.321126240101023, 17.32217792946807, 18.76235709625854]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3956979928080333, -3.5349456247380715, -4.837566871767311, -3.2232522964714994]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.152301562297566, -5.132379756207001, -6.207228906129217, -4.14525051791054]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5437114893705361, -1.7229895073063308, -2.3431816933078173, -1.6374127778782648]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8116960989331443, -2.2663217398553104, -2.8382271180861482, -2.0589500560944445]}}