{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:48.025299", "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": "2025-Mar-09_to_2025-Mar-14_36.0_3.0"}, "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": 2025030000262}, "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 09 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 14 2025"}, "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": 67841.00945741011}, "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": ["Ethiopia", "Kenya", "South Sudan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "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": 3.0}, "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": 36.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "36.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 34.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 36.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 2.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 5.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[36.75, 2.5], [36.53, 1.97], [36.0, 1.75], [35.75, 1.85], [35.5, 1.75], [34.97, 1.97], [34.82, 2.32], [34.47, 2.47], [34.32, 2.82], [33.97, 2.97], [33.75, 3.5], [33.85, 3.75], [33.75, 4.0], [33.85, 4.25], [33.75, 4.5], [33.85, 4.75], [33.75, 5.0], [33.97, 5.53], [34.5, 5.75], [34.75, 5.65], [35.0, 5.75], [35.25, 5.65], [35.5, 5.75], [35.75, 5.65], [36.0, 5.75], [36.53, 5.53], [36.75, 5.0], [36.65, 4.75], [36.75, 4.5], [36.65, 4.25], [36.68, 4.18], [37.03, 4.03], [37.25, 3.5], [37.03, 2.97], [36.68, 2.82], [36.65, 2.75], [36.75, 2.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa", "S.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-03-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.47, 4.53], [36.0, 4.75], [36.53, 4.53], [36.75, 4.0], [36.53, 3.47], [36.0, 3.25], [35.47, 3.47], [35.25, 4.0], [35.47, 4.53]]]]}, "2025-03-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.75, 4.0], [33.85, 4.25], [33.75, 4.5], [33.85, 4.75], [33.75, 5.0], [33.97, 5.53], [34.5, 5.75], [34.75, 5.65], [35.0, 5.75], [35.25, 5.65], [35.5, 5.75], [35.75, 5.65], [36.0, 5.75], [36.53, 5.53], [36.75, 5.0], [36.65, 4.75], [36.75, 4.5], [36.65, 4.25], [36.68, 4.18], [37.03, 4.03], [37.25, 3.5], [37.03, 2.97], [36.68, 2.82], [36.65, 2.75], [36.75, 2.5], [36.53, 1.97], [36.0, 1.75], [35.75, 1.85], [35.5, 1.75], [34.97, 1.97], [34.82, 2.32], [34.47, 2.47], [34.32, 2.82], [33.97, 2.97], [33.75, 3.5], [33.85, 3.75], [33.75, 4.0]]]]}, "2025-03-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.75, 4.0], [33.85, 4.25], [33.75, 4.5], [33.85, 4.75], [33.75, 5.0], [33.97, 5.53], [34.5, 5.75], [34.75, 5.65], [35.0, 5.75], [35.25, 5.65], [35.5, 5.75], [35.75, 5.65], [36.0, 5.75], [36.53, 5.53], [36.75, 5.0], [36.65, 4.75], [36.75, 4.5], [36.65, 4.25], [36.68, 4.18], [37.03, 4.03], [37.25, 3.5], [37.03, 2.97], [36.68, 2.82], [36.65, 2.75], [36.75, 2.5], [36.53, 1.97], [36.0, 1.75], [35.75, 1.85], [35.5, 1.75], [34.97, 1.97], [34.82, 2.32], [34.47, 2.47], [34.32, 2.82], [33.97, 2.97], [33.75, 3.5], [33.85, 3.75], [33.75, 4.0]]]]}, "2025-03-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.75, 4.0], [33.85, 4.25], [33.75, 4.5], [33.85, 4.75], [33.75, 5.0], [33.97, 5.53], [34.5, 5.75], [34.75, 5.65], [35.0, 5.75], [35.25, 5.65], [35.5, 5.75], [35.75, 5.65], [36.0, 5.75], [36.53, 5.53], [36.75, 5.0], [36.65, 4.75], [36.75, 4.5], [36.65, 4.25], [36.68, 4.18], [37.03, 4.03], [37.25, 3.5], [37.03, 2.97], [36.68, 2.82], [36.65, 2.75], [36.75, 2.5], [36.53, 1.97], [36.0, 1.75], [35.75, 1.85], [35.5, 1.75], [34.97, 1.97], [34.82, 2.32], [34.47, 2.47], [34.32, 2.82], [33.97, 2.97], [33.75, 3.5], [33.85, 3.75], [33.75, 4.0]]]]}, "2025-03-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.75, 4.0], [33.85, 4.25], [33.75, 4.5], [33.97, 5.03], [34.5, 5.25], [34.75, 5.15], [35.0, 5.25], [35.53, 5.03], [35.68, 4.68], [36.03, 4.53], [36.25, 4.0], [36.15, 3.75], [36.18, 3.68], [36.53, 3.53], [36.75, 3.0], [36.65, 2.75], [36.75, 2.5], [36.53, 1.97], [36.0, 1.75], [35.75, 1.85], [35.5, 1.75], [34.97, 1.97], [34.75, 2.5], [34.85, 2.75], [34.8, 2.88], [34.5, 2.75], [33.97, 2.97], [33.75, 3.5], [33.85, 3.75], [33.75, 4.0]]]]}, "2025-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.47, 3.53], [36.0, 3.75], [36.53, 3.53], [36.75, 3.0], [36.53, 2.47], [36.0, 2.25], [35.47, 2.47], [35.25, 3.0], [35.47, 3.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.17998930320016}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.245993840934949}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.850195821126306, 24.234925495494508, 27.338326910770377, 27.31609462391242, 27.78126192959877, 30.635032908121786]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.850195821126306, 21.337331390380882, 24.59621709187826, 23.990318552653036, 24.56325174967452, 30.635032908121786]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8126322977898326, -6.648742144117082, -3.5058214006529442, -3.479958959003746, -2.9276001109243763, -1.4577848328799519]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8126322977898326, -8.17998930320016, -4.559286460137059, -4.716163187679001, -3.673695726380913, -1.4577848328799519]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8941727180629455, -4.472095254445757, -2.361217530418972, -2.218631170109477, -1.7368584309612318, -1.0366124892819748]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8941727180629455, -5.646700369619181, -3.0450857626151646, -2.6692649012349614, -1.9459015002302027, -1.0366124892819748]}}