{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:18.718878", "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": "2019-Mar-08_to_2019-Mar-13_16.5_-27.0"}, "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": 2019030000248}, "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": "March 08 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 13 2019"}, "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": 136146.01529192305}, "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", "South Africa"]}, "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": -27.0}, "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": 16.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 19.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -30.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -25.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-03-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -27.5], [15.47, -26.97], [16.0, -26.75], [16.53, -26.97], [16.68, -27.32], [17.03, -27.47], [17.25, -28.0], [17.13, -28.3], [17.53, -28.47], [17.75, -29.0], [17.63, -29.3], [18.03, -29.47], [18.25, -30.0], [18.03, -30.53], [17.5, -30.75], [16.97, -30.53], [16.75, -30.0], [16.88, -29.7], [16.47, -29.53], [16.25, -29.0], [16.38, -28.7], [15.97, -28.53], [15.82, -28.18], [15.47, -28.03], [15.25, -27.5]]]]}, "2019-03-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.85, -26.25], [14.75, -26.0], [14.85, -25.75], [14.75, -25.5], [14.97, -24.97], [15.5, -24.75], [16.03, -24.97], [16.18, -25.32], [16.53, -25.47], [16.75, -26.0], [16.65, -26.25], [16.68, -26.32], [16.75, -26.35], [16.82, -26.32], [16.97, -25.97], [17.5, -25.75], [17.75, -25.85], [18.0, -25.75], [18.53, -25.97], [18.75, -26.5], [18.65, -26.75], [18.68, -26.82], [19.03, -26.97], [19.18, -27.32], [19.53, -27.47], [19.75, -28.0], [19.65, -28.25], [19.75, -28.5], [19.54, -29.0], [19.75, -29.5], [19.65, -29.75], [19.75, -30.0], [19.65, -30.25], [19.75, -30.5], [19.53, -31.03], [19.0, -31.25], [18.75, -31.15], [18.5, -31.25], [18.25, -31.15], [18.0, -31.25], [17.75, -31.15], [17.5, -31.25], [16.97, -31.03], [16.75, -30.5], [16.85, -30.25], [16.82, -30.18], [16.47, -30.03], [16.25, -29.5], [16.35, -29.25], [16.25, -29.0], [16.35, -28.75], [16.32, -28.68], [15.97, -28.53], [15.82, -28.18], [15.47, -28.03], [15.32, -27.68], [14.97, -27.53], [14.75, -27.0], [14.85, -26.75], [14.75, -26.5], [14.85, -26.25]]]]}, "2019-03-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.85, -26.25], [14.75, -26.0], [14.85, -25.75], [14.75, -25.5], [14.97, -24.97], [15.5, -24.75], [16.03, -24.97], [16.18, -25.32], [16.53, -25.47], [16.68, -25.82], [17.0, -25.96], [17.5, -25.75], [17.75, -25.85], [18.0, -25.75], [18.53, -25.97], [18.75, -26.5], [18.65, -26.75], [18.68, -26.82], [19.03, -26.97], [19.18, -27.32], [19.53, -27.47], [19.75, -28.0], [19.65, -28.25], [19.68, -28.32], [20.03, -28.47], [20.25, -29.0], [20.03, -29.53], [19.68, -29.68], [19.65, -29.75], [19.75, -30.0], [19.65, -30.25], [19.75, -30.5], [19.53, -31.03], [19.0, -31.25], [18.75, -31.15], [18.5, -31.25], [18.25, -31.15], [18.0, -31.25], [17.75, -31.15], [17.5, -31.25], [16.97, -31.03], [16.75, -30.5], [16.85, -30.25], [16.82, -30.18], [16.47, -30.03], [16.25, -29.5], [16.35, -29.25], [16.25, -29.0], [16.35, -28.75], [16.32, -28.68], [15.97, -28.53], [15.82, -28.18], [15.47, -28.03], [15.32, -27.68], [14.97, -27.53], [14.75, -27.0], [14.85, -26.75], [14.75, -26.5], [14.85, -26.25]]]]}, "2019-03-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.85, -26.25], [14.75, -26.0], [14.85, -25.75], [14.75, -25.5], [14.97, -24.97], [15.5, -24.75], [16.03, -24.97], [16.18, -25.32], [16.53, -25.47], [16.68, -25.82], [17.0, -25.96], [17.5, -25.75], [17.75, -25.85], [18.0, -25.75], [18.53, -25.97], [18.75, -26.5], [18.65, -26.75], [18.68, -26.82], [19.03, -26.97], [19.18, -27.32], [19.53, -27.47], [19.75, -28.0], [19.65, -28.25], [19.68, -28.32], [20.03, -28.47], [20.25, -29.0], [20.03, -29.53], [19.68, -29.68], [19.65, -29.75], [19.75, -30.0], [19.65, -30.25], [19.75, -30.5], [19.53, -31.03], [19.0, -31.25], [18.75, -31.15], [18.5, -31.25], [18.25, -31.15], [18.0, -31.25], [17.75, -31.15], [17.5, -31.25], [16.97, -31.03], [16.75, -30.5], [16.85, -30.25], [16.82, -30.18], [16.47, -30.03], [16.25, -29.5], [16.46, -29.0], [16.25, -28.5], [16.35, -28.25], [16.32, -28.18], [16.25, -28.15], [16.0, -28.25], [15.47, -28.03], [15.32, -27.68], [14.97, -27.53], [14.75, -27.0], [14.85, -26.75], [14.75, -26.5], [14.85, -26.25]]]]}, "2019-03-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.97, -29.03], [16.75, -28.5], [16.97, -27.97], [17.5, -27.75], [18.03, -27.97], [18.18, -28.32], [18.25, -28.35], [18.5, -28.25], [18.75, -28.35], [19.0, -28.25], [19.25, -28.35], [19.5, -28.25], [20.03, -28.47], [20.25, -29.0], [20.03, -29.53], [19.5, -29.75], [19.25, -29.65], [19.0, -29.75], [18.75, -29.65], [18.68, -29.68], [18.65, -29.75], [18.75, -30.0], [18.53, -30.53], [18.0, -30.75], [17.75, -30.65], [17.5, -30.75], [16.97, -30.53], [16.75, -30.0], [16.97, -29.47], [17.32, -29.32], [17.35, -29.25], [17.32, -29.18], [16.97, -29.03]]], [[[18.75, -27.0], [18.53, -27.53], [18.0, -27.75], [17.47, -27.53], [17.25, -27.0], [17.47, -26.47], [18.0, -26.25], [18.53, -26.47], [18.75, -27.0]]], [[[15.5, -25.25], [16.03, -25.47], [16.18, -25.82], [16.25, -25.85], [16.5, -25.75], [17.03, -25.97], [17.25, -26.5], [17.15, -26.75], [17.25, -27.0], [17.03, -27.53], [16.5, -27.75], [16.25, -27.65], [16.0, -27.75], [15.47, -27.53], [15.25, -27.0], [15.35, -26.75], [15.32, -26.68], [14.97, -26.53], [14.75, -26.0], [14.97, -25.47], [15.5, -25.25]]]]}, "2019-03-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.5, -25.25], [16.03, -25.47], [16.25, -26.0], [16.03, -26.53], [15.5, -26.75], [14.97, -26.53], [14.75, -26.0], [14.97, -25.47], [15.5, -25.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.79839594160336}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.729930088341746}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.88513743627726, 17.84634263560872, 16.619255092282515, 18.335813336117496, 19.84504720705496, 20.466088423042777]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.22932098553059, 14.486436215241326, 13.828991112609913, 15.392724175591638, 17.128412577088454, 20.466088423042777]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.332159350469567, -5.757046399606279, -6.843656914493603, -5.17516607555681, -4.087502326277347, -3.9828663853834314]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.655955798985701, -7.773358720202964, -8.79839594160336, -6.95809289643671, -5.024746666820818, -3.9828663853834314]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2402301296762284, -1.8905797702023812, -2.3058225381426602, -1.8021844758834256, -1.4912960559325008, -1.415127677192356]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3172723708336183, -2.4842597233166344, -3.044378402728654, -2.3065063229989438, -1.726495783656881, -1.415127677192356]}}