{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:21:39.438974", "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": "2020-Oct-07_to_2020-Oct-17_14.0_-23.0"}, "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": 2020100000214}, "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": "October 07 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 17 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 11}, "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": 130648.065427035}, "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": ["South Atlantic Ocean"]}, "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": -23.0}, "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": 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": 10.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 15.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-10-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.97, -24.03], [13.75, -23.5], [13.97, -22.97], [14.5, -22.75], [15.03, -22.97], [15.25, -23.5], [15.03, -24.03], [14.5, -24.25], [13.97, -24.03]]], [[[12.97, -19.03], [12.75, -18.5], [12.97, -17.97], [13.5, -17.75], [14.03, -17.97], [14.25, -18.5], [14.03, -19.03], [13.5, -19.25], [12.97, -19.03]]]]}, "2020-10-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.75, -18.0], [11.97, -17.47], [12.5, -17.25], [12.75, -17.35], [13.0, -17.25], [13.25, -17.35], [13.5, -17.25], [13.75, -17.35], [14.0, -17.25], [14.25, -17.35], [14.5, -17.25], [15.03, -17.47], [15.25, -18.0], [15.15, -18.25], [15.25, -18.5], [15.15, -18.75], [15.25, -19.0], [15.13, -19.3], [15.53, -19.47], [15.75, -20.0], [15.65, -20.25], [15.68, -20.32], [16.03, -20.47], [16.25, -21.0], [16.03, -21.53], [15.68, -21.68], [15.65, -21.75], [15.68, -21.82], [16.03, -21.97], [16.25, -22.5], [16.15, -22.75], [16.25, -23.0], [16.03, -23.53], [15.5, -23.75], [15.2, -23.62], [15.03, -24.03], [14.5, -24.25], [13.97, -24.03], [13.75, -23.5], [13.97, -22.97], [14.38, -22.8], [14.25, -22.5], [14.35, -22.25], [14.25, -22.0], [14.35, -21.75], [14.32, -21.68], [13.97, -21.53], [13.82, -21.18], [13.47, -21.03], [13.32, -20.68], [12.97, -20.53], [12.75, -20.0], [12.85, -19.75], [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]]]]}, "2020-10-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.97, -18.53], [9.75, -18.0], [9.97, -17.47], [10.5, -17.25], [10.75, -17.35], [11.0, -17.25], [11.25, -17.35], [11.5, -17.25], [12.0, -17.46], [12.5, -17.25], [12.75, -17.35], [13.0, -17.25], [13.25, -17.35], [13.5, -17.25], [13.75, -17.35], [14.0, -17.25], [14.25, -17.35], [14.5, -17.25], [15.03, -17.47], [15.25, -18.0], [15.15, -18.25], [15.25, -18.5], [15.15, -18.75], [15.25, -19.0], [15.13, -19.3], [15.53, -19.47], [15.75, -20.0], [15.65, -20.25], [15.68, -20.32], [16.03, -20.47], [16.25, -21.0], [16.03, -21.53], [15.68, -21.68], [15.65, -21.75], [15.68, -21.82], [16.03, -21.97], [16.25, -22.5], [16.15, -22.75], [16.25, -23.0], [16.03, -23.53], [15.5, -23.75], [15.2, -23.62], [15.03, -24.03], [14.5, -24.25], [13.97, -24.03], [13.75, -23.5], [13.97, -22.97], [14.38, -22.8], [14.25, -22.5], [14.35, -22.25], [14.25, -22.0], [14.35, -21.75], [14.32, -21.68], [13.97, -21.53], [13.82, -21.18], [13.47, -21.03], [13.32, -20.68], [12.97, -20.53], [12.75, -20.0], [12.85, -19.75], [12.75, -19.5], [12.85, -19.25], [12.82, -19.18], [12.7, -19.12], [12.53, -19.53], [12.0, -19.75], [11.47, -19.53], [11.25, -19.0], [11.35, -18.75], [11.32, -18.68], [11.25, -18.65], [11.0, -18.75], [10.75, -18.65], [10.5, -18.75], [9.97, -18.53]]]]}, "2020-10-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.75, -18.0], [9.97, -17.47], [10.5, -17.25], [10.75, -17.35], [11.0, -17.25], [11.25, -17.35], [11.5, -17.25], [12.0, -17.46], [12.5, -17.25], [12.75, -17.35], [13.0, -17.25], [13.25, -17.35], [13.5, -17.25], [13.75, -17.35], [14.0, -17.25], [14.25, -17.35], [14.5, -17.25], [15.03, -17.47], [15.25, -18.0], [15.15, -18.25], [15.25, -18.5], [15.15, -18.75], [15.25, -19.0], [15.13, -19.3], [15.53, -19.47], [15.75, -20.0], [15.65, -20.25], [15.68, -20.32], [16.03, -20.47], [16.25, -21.0], [16.03, -21.53], [15.68, -21.68], [15.65, -21.75], [15.68, -21.82], [16.03, -21.97], [16.25, -22.5], [16.15, -22.75], [16.25, -23.0], [16.03, -23.53], [15.5, -23.75], [15.2, -23.62], [15.03, -24.03], [14.5, -24.25], [13.97, -24.03], [13.75, -23.5], [13.85, -23.25], [13.75, -23.0], [13.97, -22.47], [14.32, -22.32], [14.35, -22.25], [14.25, -22.0], [14.35, -21.75], [14.32, -21.68], [13.97, -21.53], [13.82, -21.18], [13.47, -21.03], [13.32, -20.68], [12.97, -20.53], [12.8, -20.12], [12.5, -20.25], [11.97, -20.03], [11.82, -19.68], [11.47, -19.53], [11.32, -19.18], [11.25, -19.15], [11.0, -19.25], [10.47, -19.03], [10.32, -18.68], [9.97, -18.53], [9.75, -18.0]]]]}, "2020-10-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.47, -22.47], [14.0, -22.25], [14.25, -22.35], [14.5, -22.25], [15.03, -22.47], [15.25, -23.0], [15.15, -23.25], [15.25, -23.5], [15.03, -24.03], [14.5, -24.25], [13.97, -24.03], [13.82, -23.68], [13.47, -23.53], [13.25, -23.0], [13.47, -22.47]]], [[[9.97, -17.47], [10.5, -17.25], [10.75, -17.35], [11.0, -17.25], [11.25, -17.35], [11.5, -17.25], [12.03, -17.47], [12.18, -17.82], [12.53, -17.97], [12.68, -18.32], [13.03, -18.47], [13.25, -19.0], [13.15, -19.25], [13.25, -19.5], [13.15, -19.75], [13.18, -19.82], [13.53, -19.97], [13.75, -20.5], [13.53, -21.03], [13.0, -21.25], [12.47, -21.03], [12.32, -20.68], [11.97, -20.53], [11.75, -20.0], [11.85, -19.75], [11.82, -19.68], [11.47, -19.53], [11.32, -19.18], [11.25, -19.15], [11.0, -19.25], [10.47, -19.03], [10.32, -18.68], [9.97, -18.53], [9.75, -18.0], [9.97, -17.47]]]]}, "2020-10-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.25, -23.0], [13.47, -22.47], [14.0, -22.25], [14.25, -22.35], [14.5, -22.25], [15.03, -22.47], [15.25, -23.0], [15.03, -23.53], [14.5, -23.75], [14.25, -23.65], [14.0, -23.75], [13.47, -23.53], [13.25, -23.0]]], [[[9.97, -17.47], [10.5, -17.25], [10.75, -17.35], [11.0, -17.25], [11.25, -17.35], [11.5, -17.25], [12.03, -17.47], [12.18, -17.82], [12.53, -17.97], [12.68, -18.32], [13.03, -18.47], [13.25, -19.0], [13.15, -19.25], [13.25, -19.5], [13.15, -19.75], [13.18, -19.82], [13.53, -19.97], [13.75, -20.5], [13.53, -21.03], [13.0, -21.25], [12.47, -21.03], [12.32, -20.68], [11.97, -20.53], [11.75, -20.0], [11.85, -19.75], [11.82, -19.68], [11.47, -19.53], [11.32, -19.18], [11.25, -19.15], [11.0, -19.25], [10.47, -19.03], [10.32, -18.68], [9.97, -18.53], [9.75, -18.0], [9.97, -17.47]]]]}, "2020-10-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.0, -22.25], [14.53, -22.47], [14.75, -23.0], [14.65, -23.25], [14.75, -23.5], [14.53, -24.03], [14.0, -24.25], [13.47, -24.03], [13.25, -23.5], [13.35, -23.25], [13.25, -23.0], [13.47, -22.47], [14.0, -22.25]]], [[[9.75, -18.0], [9.97, -17.47], [10.5, -17.25], [10.75, -17.35], [11.0, -17.25], [11.53, -17.47], [11.7, -17.87], [12.0, -17.75], [12.53, -17.97], [12.75, -18.5], [12.65, -18.75], [12.68, -18.82], [13.03, -18.97], [13.25, -19.5], [13.15, -19.75], [13.18, -19.82], [13.53, -19.97], [13.75, -20.5], [13.53, -21.03], [13.0, -21.25], [12.47, -21.03], [12.32, -20.68], [11.97, -20.53], [11.75, -20.0], [11.85, -19.75], [11.82, -19.68], [11.47, -19.53], [11.25, -19.0], [11.35, -18.75], [11.3, -18.62], [11.0, -18.75], [10.75, -18.65], [10.5, -18.75], [9.97, -18.53], [9.75, -18.0]]]]}, "2020-10-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.0, -22.25], [14.53, -22.47], [14.75, -23.0], [14.65, -23.25], [14.75, -23.5], [14.53, -24.03], [14.0, -24.25], [13.47, -24.03], [13.25, -23.5], [13.35, -23.25], [13.25, -23.0], [13.47, -22.47], [14.0, -22.25]]], [[[12.47, -21.03], [12.25, -20.5], [12.47, -19.97], [13.0, -19.75], [13.53, -19.97], [13.75, -20.5], [13.53, -21.03], [13.0, -21.25], [12.47, -21.03]]]]}, "2020-10-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.0, -22.25], [14.53, -22.47], [14.75, -23.0], [14.65, -23.25], [14.75, -23.5], [14.53, -24.03], [14.0, -24.25], [13.75, -24.15], [13.5, -24.25], [12.97, -24.03], [12.75, -23.5], [12.97, -22.97], [13.32, -22.82], [13.47, -22.47], [14.0, -22.25]]]]}, "2020-10-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.0, -22.25], [14.53, -22.47], [14.75, -23.0], [14.65, -23.25], [14.75, -23.5], [14.53, -24.03], [14.0, -24.25], [13.75, -24.15], [13.5, -24.25], [12.97, -24.03], [12.75, -23.5], [12.97, -22.97], [13.32, -22.82], [13.47, -22.47], [14.0, -22.25]]]]}, "2020-10-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.0, -22.25], [14.53, -22.47], [14.75, -23.0], [14.65, -23.25], [14.75, -23.5], [14.53, -24.03], [14.0, -24.25], [13.75, -24.15], [13.5, -24.25], [12.97, -24.03], [12.75, -23.5], [12.97, -22.97], [13.32, -22.82], [13.47, -22.47], [14.0, -22.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.115698986679831}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.9410957617488434}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.00083592431315, 19.22528756428801, 18.46105572403286, 17.53944608869665, 13.92151464086669, 14.092219146133118, 13.9159845149494, 12.681967105781837, 13.01775758649461, 12.667654645901564, 12.78090558683283]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.13434650045167, 12.891130739265975, 13.261573702541114, 12.974123795215576, 12.563697198214697, 12.726873649365643, 12.208455220013605, 12.34274259526552, 12.529981269235066, 12.242891574826047, 12.050393792276225]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0560468556108162, -3.9016817620369277, -3.6430051684043665, -3.762007751969911, -1.2008821549021564, -1.0882612209781628, -1.016089286763329, -1.3489423055273921, -1.1560616745701964, -1.5515399550044056, -1.4825413660899092]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6101050690289185, -5.445093604072554, -6.115698986679831, -6.0497988683668495, -2.088268031215648, -1.5248319450090548, -1.6030891907725504, -1.544021248054662, -1.3901420193531067, -1.7222583281376842, -1.9107342679928934]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1864513028996968, -1.5202713519621456, -1.5680103554165206, -1.7450235471672824, -1.5047963343178201, -1.4827178841249489, -1.4891392085973791, -2.0133031621040227, -1.7433905674806478, -2.3084447076679395, -2.1141871285905025]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3376846147220613, -1.8891431588108796, -1.9800932427964892, -2.349010080750368, -1.7456592587411728, -1.935165981730193, -2.175888814194702, -2.217455401728354, -2.0464262331006675, -2.4989355208500625, -2.6340320948278846]}}