{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:22.790924", "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": "2010-Dec-28_to_2011-Jan-02_13.0_-17.0"}, "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": 2010120001272}, "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": "December 28 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 02 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 56089.54851638582}, "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": ["Angola", "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": -17.0}, "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": 13.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "13.0\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": -18.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -16.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.85, -17.25], [11.75, -17.0], [11.85, -16.75], [11.75, -16.5], [11.97, -15.97], [12.5, -15.75], [12.75, -15.85], [13.0, -15.75], [13.25, -15.85], [13.5, -15.75], [13.75, -15.85], [14.0, -15.75], [14.25, -15.85], [14.5, -15.75], [15.03, -15.97], [15.18, -16.32], [15.53, -16.47], [15.75, -17.0], [15.53, -17.53], [15.0, -17.75], [14.75, -17.65], [14.68, -17.68], [14.65, -17.75], [14.75, -18.0], [14.53, -18.53], [14.18, -18.68], [14.03, -19.03], [13.5, -19.25], [12.97, -19.03], [12.8, -18.62], [12.5, -18.75], [11.97, -18.53], [11.75, -18.0], [11.85, -17.75], [11.75, -17.5], [11.85, -17.25]]]]}, "2010-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.85, -17.25], [11.75, -17.0], [11.85, -16.75], [11.75, -16.5], [11.97, -15.97], [12.5, -15.75], [12.75, -15.85], [13.0, -15.75], [13.25, -15.85], [13.5, -15.75], [13.75, -15.85], [14.0, -15.75], [14.25, -15.85], [14.5, -15.75], [15.03, -15.97], [15.18, -16.32], [15.53, -16.47], [15.75, -17.0], [15.53, -17.53], [15.0, -17.75], [14.75, -17.65], [14.68, -17.68], [14.65, -17.75], [14.75, -18.0], [14.53, -18.53], [14.18, -18.68], [14.03, -19.03], [13.5, -19.25], [12.97, -19.03], [12.82, -18.68], [12.75, -18.65], [12.5, -18.75], [11.97, -18.53], [11.75, -18.0], [11.85, -17.75], [11.75, -17.5], [11.85, -17.25]]]]}, "2010-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.85, -17.25], [11.75, -17.0], [11.85, -16.75], [11.75, -16.5], [11.97, -15.97], [12.5, -15.75], [12.75, -15.85], [13.0, -15.75], [13.25, -15.85], [13.5, -15.75], [13.75, -15.85], [14.0, -15.75], [14.25, -15.85], [14.5, -15.75], [15.03, -15.97], [15.18, -16.32], [15.53, -16.47], [15.75, -17.0], [15.53, -17.53], [15.0, -17.75], [14.75, -17.65], [14.68, -17.68], [14.65, -17.75], [14.75, -18.0], [14.53, -18.53], [14.18, -18.68], [14.03, -19.03], [13.5, -19.25], [12.97, -19.03], [12.82, -18.68], [12.75, -18.65], [12.5, -18.75], [11.97, -18.53], [11.75, -18.0], [11.85, -17.75], [11.75, -17.5], [11.85, -17.25]]]]}, "2010-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.35, -17.25], [12.25, -17.0], [12.47, -16.47], [13.0, -16.25], [13.25, -16.35], [13.5, -16.25], [14.03, -16.47], [14.25, -17.0], [14.04, -17.5], [14.25, -18.0], [14.03, -18.53], [13.5, -18.75], [13.25, -18.65], [13.0, -18.75], [12.47, -18.53], [12.25, -18.0], [12.35, -17.75], [12.25, -17.5], [12.35, -17.25]]]]}, "2011-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.25, -17.0], [12.47, -16.47], [13.0, -16.25], [13.25, -16.35], [13.5, -16.25], [14.03, -16.47], [14.25, -17.0], [14.04, -17.5], [14.25, -18.0], [14.03, -18.53], [13.5, -18.75], [12.97, -18.53], [12.75, -18.0], [12.88, -17.7], [12.47, -17.53], [12.25, -17.0]]]]}, "2011-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.5, -17.25], [14.03, -17.47], [14.25, -18.0], [14.03, -18.53], [13.5, -18.75], [12.97, -18.53], [12.75, -18.0], [12.97, -17.47], [13.5, -17.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.700333233858373}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.677981065632235}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.399489047578356, 19.3927490852667, 21.22038321332633, 22.302400327432792, 22.946321916419436, 22.250277703604354]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.564628166662203, 17.75567916114079, 18.784920351735934, 20.638280116901058, 22.16197206511947, 22.250277703604354]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2232647493725732, -5.139351164336299, -3.2905898146908132, -2.175453955832404, -2.5538145278928255, -2.3424118130333227]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.876918703926037, -6.700333233858373, -4.620146358608224, -2.6073700039833625, -2.7182833858073536, -2.3424118130333227]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9072681861168315, -3.1328566311649357, -2.056828476301248, -1.4365734360222027, -1.6019179932113612, -1.4247677079286512]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5464518128889377, -3.7445527092207485, -2.9542197877941105, -1.7040296729724378, -1.704517191888026, -1.4247677079286512]}}