{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:28.223122", "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-Apr-22_to_2025-Apr-24_39.5_0.5"}, "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": 2025040000553}, "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": "April 22 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 24 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 86528.76188466005}, "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": ["Kenya"]}, "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": 0.5}, "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": 39.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "39.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 38.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 40.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -3.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 2.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[38.0, 0.75], [38.25, 0.65], [38.32, 0.68], [38.46, 1.0], [38.25, 1.5], [38.35, 1.75], [38.25, 2.0], [38.47, 2.53], [39.0, 2.75], [39.25, 2.65], [39.5, 2.75], [40.03, 2.53], [40.18, 2.18], [40.53, 2.03], [40.68, 1.68], [41.03, 1.53], [41.25, 1.0], [41.03, 0.47], [40.68, 0.32], [40.65, 0.25], [40.75, 0.0], [40.65, -0.25], [40.75, -0.5], [40.53, -1.03], [40.18, -1.18], [40.15, -1.25], [40.25, -1.5], [40.04, -2.0], [40.25, -2.5], [40.15, -2.75], [40.25, -3.0], [40.03, -3.53], [39.5, -3.75], [38.97, -3.53], [38.75, -3.0], [38.85, -2.75], [38.82, -2.68], [38.47, -2.53], [38.25, -2.0], [38.35, -1.75], [38.25, -1.5], [38.35, -1.25], [38.32, -1.18], [38.25, -1.15], [38.0, -1.25], [37.47, -1.03], [37.25, -0.5], [37.35, -0.25], [37.25, 0.0], [37.47, 0.53], [38.0, 0.75]]]]}}, "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": {"2025-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.25, 0.0], [37.47, 0.53], [38.0, 0.75], [38.25, 0.65], [38.32, 0.68], [38.46, 1.0], [38.25, 1.5], [38.35, 1.75], [38.25, 2.0], [38.47, 2.53], [39.0, 2.75], [39.25, 2.65], [39.5, 2.75], [40.03, 2.53], [40.18, 2.18], [40.53, 2.03], [40.68, 1.68], [41.03, 1.53], [41.25, 1.0], [41.03, 0.47], [40.68, 0.32], [40.65, 0.25], [40.75, 0.0], [40.65, -0.25], [40.75, -0.5], [40.53, -1.03], [40.18, -1.18], [40.15, -1.25], [40.25, -1.5], [40.04, -2.0], [40.25, -2.5], [40.15, -2.75], [40.25, -3.0], [40.03, -3.53], [39.5, -3.75], [38.97, -3.53], [38.75, -3.0], [38.85, -2.75], [38.82, -2.68], [38.47, -2.53], [38.25, -2.0], [38.35, -1.75], [38.25, -1.5], [38.35, -1.25], [38.32, -1.18], [38.25, -1.15], [38.0, -1.25], [37.47, -1.03], [37.25, -0.5], [37.35, -0.25], [37.25, 0.0]]]]}, "2025-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.25, 0.0], [37.47, 0.53], [38.0, 0.75], [38.25, 0.65], [38.32, 0.68], [38.46, 1.0], [38.25, 1.5], [38.35, 1.75], [38.25, 2.0], [38.47, 2.53], [39.0, 2.75], [39.25, 2.65], [39.5, 2.75], [40.03, 2.53], [40.18, 2.18], [40.53, 2.03], [40.68, 1.68], [41.03, 1.53], [41.25, 1.0], [41.03, 0.47], [40.68, 0.32], [40.65, 0.25], [40.75, 0.0], [40.65, -0.25], [40.75, -0.5], [40.53, -1.03], [40.18, -1.18], [40.15, -1.25], [40.25, -1.5], [40.04, -2.0], [40.25, -2.5], [40.15, -2.75], [40.25, -3.0], [40.03, -3.53], [39.5, -3.75], [38.97, -3.53], [38.75, -3.0], [38.85, -2.75], [38.82, -2.68], [38.47, -2.53], [38.25, -2.0], [38.35, -1.75], [38.25, -1.5], [38.35, -1.25], [38.32, -1.18], [38.25, -1.15], [38.0, -1.25], [37.47, -1.03], [37.25, -0.5], [37.35, -0.25], [37.25, 0.0]]]]}, "2025-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.25, 0.0], [37.47, 0.53], [38.0, 0.75], [38.25, 0.65], [38.32, 0.68], [38.46, 1.0], [38.25, 1.5], [38.35, 1.75], [38.25, 2.0], [38.47, 2.53], [39.0, 2.75], [39.25, 2.65], [39.5, 2.75], [40.03, 2.53], [40.18, 2.18], [40.53, 2.03], [40.68, 1.68], [41.03, 1.53], [41.25, 1.0], [41.03, 0.47], [40.68, 0.32], [40.65, 0.25], [40.75, 0.0], [40.65, -0.25], [40.75, -0.5], [40.53, -1.03], [40.18, -1.18], [40.15, -1.25], [40.25, -1.5], [40.04, -2.0], [40.25, -2.5], [40.15, -2.75], [40.25, -3.0], [40.03, -3.53], [39.5, -3.75], [38.97, -3.53], [38.75, -3.0], [38.85, -2.75], [38.82, -2.68], [38.47, -2.53], [38.25, -2.0], [38.35, -1.75], [38.25, -1.5], [38.35, -1.25], [38.32, -1.18], [38.25, -1.15], [38.0, -1.25], [37.47, -1.03], [37.25, -0.5], [37.35, -0.25], [37.25, 0.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.116859266070378}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.2488092704729623}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.89073842366537, 25.596915544782405, 26.56810640607563]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.40300649007162, 22.324187215169275, 23.5263496398926]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.73242604085951, -3.00636687011971, -2.0076349004396667]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.364416686404411, -4.116859266070378, -2.8855221307015313]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4997851354537342, -2.663168120540715, -1.7809950025041001]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8751813363865895, -3.5651058241242604, -2.3426490915513924]}}