{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:52.701803", "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": "2024-Mar-28_to_2024-Apr-04_14.0_-22.5"}, "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": 2024030000604}, "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 28 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 04 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 63485.37494517924}, "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"]}, "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": ["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": -22.5}, "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": 11.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[14.5, -25.25], [13.97, -25.03], [13.75, -24.5], [13.85, -24.25], [13.75, -24.0], [13.85, -23.75], [13.82, -23.68], [13.47, -23.53], [13.32, -23.18], [12.97, -23.03], [12.75, -22.5], [12.85, -22.25], [12.75, -22.0], [12.85, -21.75], [12.82, -21.68], [12.47, -21.53], [12.25, -21.0], [12.35, -20.75], [12.25, -20.5], [12.35, -20.25], [12.32, -20.18], [11.97, -20.03], [11.82, -19.68], [11.5, -19.54], [11.0, -19.75], [10.47, -19.53], [10.25, -19.0], [10.47, -18.47], [10.82, -18.32], [10.85, -18.25], [10.75, -18.0], [10.85, -17.75], [10.75, -17.5], [10.97, -16.97], [11.5, -16.75], [12.03, -16.97], [12.25, -17.5], [12.15, -17.75], [12.18, -17.82], [12.53, -17.97], [12.68, -18.32], [13.03, -18.47], [13.25, -19.0], [13.15, -19.25], [13.18, -19.32], [13.53, -19.47], [13.75, -20.0], [13.65, -20.25], [13.68, -20.32], [14.03, -20.47], [14.25, -21.0], [14.15, -21.25], [14.18, -21.32], [14.53, -21.47], [14.75, -22.0], [14.65, -22.25], [14.68, -22.32], [15.03, -22.47], [15.25, -23.0], [15.15, -23.25], [15.25, -23.5], [15.15, -23.75], [15.25, -24.0], [15.15, -24.25], [15.25, -24.5], [15.03, -25.03], [14.5, -25.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.97, -23.97], [14.5, -23.75], [15.03, -23.97], [15.25, -24.5], [15.03, -25.03], [14.5, -25.25], [13.97, -25.03], [13.75, -24.5], [13.97, -23.97]]]]}, "2024-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.25, -20.5], [12.47, -19.97], [13.0, -19.75], [13.53, -19.97], [13.68, -20.32], [14.03, -20.47], [14.25, -21.0], [14.15, -21.25], [14.18, -21.32], [14.53, -21.47], [14.75, -22.0], [14.65, -22.25], [14.75, -22.5], [14.65, -22.75], [14.75, -23.0], [14.63, -23.3], [15.03, -23.47], [15.25, -24.0], [15.15, -24.25], [15.25, -24.5], [15.03, -25.03], [14.5, -25.25], [13.97, -25.03], [13.75, -24.5], [13.85, -24.25], [13.75, -24.0], [13.88, -23.7], [13.47, -23.53], [13.32, -23.18], [12.97, -23.03], [12.75, -22.5], [12.85, -22.25], [12.75, -22.0], [12.85, -21.75], [12.82, -21.68], [12.47, -21.53], [12.25, -21.0], [12.35, -20.75], [12.25, -20.5]]]]}, "2024-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.97, -18.53], [10.75, -18.0], [10.97, -17.47], [11.5, -17.25], [12.03, -17.47], [12.18, -17.82], [12.53, -17.97], [12.75, -18.5], [12.63, -18.8], [13.03, -18.97], [13.25, -19.5], [13.13, -19.8], [13.53, -19.97], [13.68, -20.32], [14.03, -20.47], [14.25, -21.0], [14.15, -21.25], [14.18, -21.32], [14.53, -21.47], [14.75, -22.0], [14.65, -22.25], [14.68, -22.32], [15.03, -22.47], [15.25, -23.0], [15.15, -23.25], [15.25, -23.5], [15.15, -23.75], [15.25, -24.0], [15.15, -24.25], [15.25, -24.5], [15.03, -25.03], [14.5, -25.25], [13.97, -25.03], [13.75, -24.5], [13.85, -24.25], [13.75, -24.0], [13.85, -23.75], [13.82, -23.68], [13.47, -23.53], [13.32, -23.18], [12.97, -23.03], [12.75, -22.5], [12.85, -22.25], [12.75, -22.0], [12.85, -21.75], [12.82, -21.68], [12.47, -21.53], [12.25, -21.0], [12.35, -20.75], [12.25, -20.5], [12.38, -20.2], [11.97, -20.03], [11.75, -19.5], [11.88, -19.2], [11.47, -19.03], [11.32, -18.68], [10.97, -18.53]]]]}, "2024-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.85, -18.25], [10.75, -18.0], [10.85, -17.75], [10.75, -17.5], [10.97, -16.97], [11.5, -16.75], [12.03, -16.97], [12.25, -17.5], [12.15, -17.75], [12.18, -17.82], [12.53, -17.97], [12.68, -18.32], [13.03, -18.47], [13.25, -19.0], [13.15, -19.25], [13.18, -19.32], [13.53, -19.47], [13.75, -20.0], [13.65, -20.25], [13.68, -20.32], [14.03, -20.47], [14.25, -21.0], [14.15, -21.25], [14.18, -21.32], [14.53, -21.47], [14.75, -22.0], [14.65, -22.25], [14.68, -22.32], [15.03, -22.47], [15.25, -23.0], [15.15, -23.25], [15.25, -23.5], [15.15, -23.75], [15.25, -24.0], [15.15, -24.25], [15.25, -24.5], [15.03, -25.03], [14.5, -25.25], [13.97, -25.03], [13.75, -24.5], [13.85, -24.25], [13.75, -24.0], [13.85, -23.75], [13.82, -23.68], [13.47, -23.53], [13.32, -23.18], [12.97, -23.03], [12.75, -22.5], [12.85, -22.25], [12.75, -22.0], [12.85, -21.75], [12.82, -21.68], [12.47, -21.53], [12.25, -21.0], [12.35, -20.75], [12.25, -20.5], [12.35, -20.25], [12.32, -20.18], [11.97, -20.03], [11.82, -19.68], [11.5, -19.54], [11.0, -19.75], [10.47, -19.53], [10.25, -19.0], [10.47, -18.47], [10.82, -18.32], [10.85, -18.25]]]]}, "2024-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.85, -18.25], [10.75, -18.0], [10.85, -17.75], [10.75, -17.5], [10.97, -16.97], [11.5, -16.75], [12.03, -16.97], [12.25, -17.5], [12.15, -17.75], [12.18, -17.82], [12.53, -17.97], [12.68, -18.32], [13.03, -18.47], [13.25, -19.0], [13.15, -19.25], [13.18, -19.32], [13.53, -19.47], [13.75, -20.0], [13.65, -20.25], [13.68, -20.32], [14.03, -20.47], [14.25, -21.0], [14.15, -21.25], [14.18, -21.32], [14.53, -21.47], [14.75, -22.0], [14.65, -22.25], [14.68, -22.32], [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], [13.35, -22.75], [13.25, -22.5], [13.35, -22.25], [13.32, -22.18], [12.97, -22.03], [12.82, -21.68], [12.47, -21.53], [12.25, -21.0], [12.35, -20.75], [12.25, -20.5], [12.35, -20.25], [12.32, -20.18], [11.97, -20.03], [11.82, -19.68], [11.5, -19.54], [11.0, -19.75], [10.47, -19.53], [10.25, -19.0], [10.47, -18.47], [10.82, -18.32], [10.85, -18.25]]]]}, "2024-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.85, -18.25], [10.75, -18.0], [10.85, -17.75], [10.75, -17.5], [10.97, -16.97], [11.5, -16.75], [12.03, -16.97], [12.25, -17.5], [12.15, -17.75], [12.18, -17.82], [12.53, -17.97], [12.68, -18.32], [13.03, -18.47], [13.25, -19.0], [13.15, -19.25], [13.18, -19.32], [13.53, -19.47], [13.75, -20.0], [13.65, -20.25], [13.68, -20.32], [14.03, -20.47], [14.25, -21.0], [14.15, -21.25], [14.18, -21.32], [14.53, -21.47], [14.75, -22.0], [14.65, -22.25], [14.68, -22.32], [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], [13.35, -22.75], [13.25, -22.5], [13.35, -22.25], [13.32, -22.18], [12.97, -22.03], [12.82, -21.68], [12.47, -21.53], [12.25, -21.0], [12.35, -20.75], [12.25, -20.5], [12.35, -20.25], [12.32, -20.18], [11.97, -20.03], [11.82, -19.68], [11.5, -19.54], [11.0, -19.75], [10.47, -19.53], [10.25, -19.0], [10.47, -18.47], [10.82, -18.32], [10.85, -18.25]]]]}, "2024-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.85, -18.25], [10.75, -18.0], [10.97, -17.47], [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], [13.18, -19.32], [13.53, -19.47], [13.75, -20.0], [13.65, -20.25], [13.68, -20.32], [14.03, -20.47], [14.25, -21.0], [14.15, -21.25], [14.18, -21.32], [14.53, -21.47], [14.75, -22.0], [14.65, -22.25], [14.68, -22.32], [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], [13.35, -22.75], [13.25, -22.5], [13.35, -22.25], [13.32, -22.18], [12.97, -22.03], [12.75, -21.5], [12.85, -21.25], [12.82, -21.18], [12.47, -21.03], [12.25, -20.5], [12.35, -20.25], [12.32, -20.18], [11.97, -20.03], [11.75, -19.5], [11.85, -19.25], [11.82, -19.18], [11.75, -19.15], [11.68, -19.18], [11.53, -19.53], [11.0, -19.75], [10.47, -19.53], [10.25, -19.0], [10.47, -18.47], [10.82, -18.32], [10.85, -18.25]]]]}, "2024-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.47, -21.97], [14.0, -21.75], [14.53, -21.97], [14.75, -22.5], [14.53, -23.03], [14.0, -23.25], [13.47, -23.03], [13.25, -22.5], [13.47, -21.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.3027420273940606}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.139363186310978}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.904736560632557, 15.959082846858223, 16.018106925841153, 16.66924523283012, 16.869640882861518, 16.748708139827954, 16.73541259917306, 15.756888298107015]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.904736560632557, 14.92533624000879, 14.48545958773974, 15.337565586936023, 15.49946960912115, 15.360044371430774, 14.85303631764009, 15.756888298107015]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5975127962959732, -1.8845477646891646, -2.2828936484349533, -2.1246090550898824, -2.1287300210572813, -2.2344909057796496, -2.172658507971034, -1.5252502279361124]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.5975127962959732, -2.4897740731033764, -3.3027420273940606, -2.8893126403138467, -2.8550523667092307, -3.1701322845840423, -2.7567173400734077, -1.5252502279361124]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.0432690222986774, -1.2566127311286628, -1.3908582893984764, -1.2365949266888245, -1.193711903012193, -1.2568170692469804, -1.261366312329243, -1.0990715553086488]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.0432690222986774, -1.5060509966487658, -1.8017596217768164, -1.4045898301221829, -1.4404981403421744, -1.417804393067332, -1.5456927073138564, -1.0990715553086488]}}