{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:55.819182", "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-25_to_2025-Mar-30_37.5_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": 2025030000655}, "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 25 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 30 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": 52540.438744957806}, "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": 37.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "37.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 37.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 40.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -1.0}, "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": [[[[36.85, 0.75], [36.75, 1.0], [36.96, 1.5], [36.75, 2.0], [36.97, 2.53], [37.5, 2.75], [37.75, 2.65], [38.0, 2.75], [38.53, 2.53], [38.75, 2.0], [38.65, 1.75], [38.68, 1.68], [38.75, 1.65], [39.0, 1.75], [39.53, 1.53], [39.75, 1.0], [39.65, 0.75], [39.68, 0.68], [40.03, 0.53], [40.18, 0.18], [40.53, 0.03], [40.75, -0.5], [40.53, -1.03], [40.18, -1.18], [40.03, -1.53], [39.5, -1.75], [38.97, -1.53], [38.82, -1.18], [38.47, -1.03], [38.32, -0.68], [37.97, -0.53], [37.82, -0.18], [37.75, -0.15], [37.5, -0.25], [36.97, -0.03], [36.75, 0.5], [36.85, 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": {"2025-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.97, 1.47], [36.75, 2.0], [36.97, 2.53], [37.5, 2.75], [37.75, 2.65], [38.0, 2.75], [38.53, 2.53], [38.75, 2.0], [38.65, 1.75], [38.68, 1.68], [38.75, 1.65], [39.0, 1.75], [39.53, 1.53], [39.75, 1.0], [39.53, 0.47], [39.0, 0.25], [38.75, 0.35], [38.5, 0.25], [38.25, 0.35], [38.0, 0.25], [37.47, 0.47], [37.25, 1.0], [37.35, 1.25], [37.32, 1.32], [36.97, 1.47]]]]}, "2025-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.75, 1.0], [36.96, 1.5], [36.75, 2.0], [36.97, 2.53], [37.5, 2.75], [37.75, 2.65], [38.0, 2.75], [38.53, 2.53], [38.75, 2.0], [38.65, 1.75], [38.68, 1.68], [38.75, 1.65], [39.0, 1.75], [39.53, 1.53], [39.75, 1.0], [39.65, 0.75], [39.75, 0.5], [39.53, -0.03], [39.0, -0.25], [38.5, -0.04], [38.0, -0.25], [37.75, -0.15], [37.5, -0.25], [36.97, -0.03], [36.75, 0.5], [36.85, 0.75], [36.75, 1.0]]]]}, "2025-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.75, 1.0], [36.96, 1.5], [36.75, 2.0], [36.97, 2.53], [37.5, 2.75], [37.75, 2.65], [38.0, 2.75], [38.53, 2.53], [38.75, 2.0], [38.65, 1.75], [38.68, 1.68], [38.75, 1.65], [39.0, 1.75], [39.53, 1.53], [39.75, 1.0], [39.65, 0.75], [39.68, 0.68], [40.03, 0.53], [40.18, 0.18], [40.53, 0.03], [40.75, -0.5], [40.53, -1.03], [40.18, -1.18], [40.03, -1.53], [39.5, -1.75], [38.97, -1.53], [38.82, -1.18], [38.47, -1.03], [38.32, -0.68], [37.97, -0.53], [37.82, -0.18], [37.75, -0.15], [37.5, -0.25], [36.97, -0.03], [36.75, 0.5], [36.85, 0.75], [36.75, 1.0]]]]}, "2025-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[36.75, 1.0], [36.96, 1.5], [36.75, 2.0], [36.97, 2.53], [37.5, 2.75], [37.75, 2.65], [38.0, 2.75], [38.53, 2.53], [38.75, 2.0], [38.65, 1.75], [38.68, 1.68], [38.75, 1.65], [39.0, 1.75], [39.53, 1.53], [39.75, 1.0], [39.65, 0.75], [39.68, 0.68], [40.03, 0.53], [40.18, 0.18], [40.53, 0.03], [40.75, -0.5], [40.53, -1.03], [40.18, -1.18], [40.03, -1.53], [39.5, -1.75], [38.97, -1.53], [38.82, -1.18], [38.47, -1.03], [38.32, -0.68], [37.97, -0.53], [37.82, -0.18], [37.75, -0.15], [37.5, -0.25], [36.97, -0.03], [36.75, 0.5], [36.85, 0.75], [36.75, 1.0]]]]}, "2025-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.5, -0.25], [36.97, -0.03], [36.75, 0.5], [36.97, 1.03], [37.5, 1.25], [38.03, 1.03], [38.2, 0.62], [38.5, 0.75], [38.75, 0.65], [39.0, 0.75], [39.25, 0.65], [39.5, 0.75], [40.03, 0.53], [40.18, 0.18], [40.53, 0.03], [40.75, -0.5], [40.53, -1.03], [40.18, -1.18], [40.03, -1.53], [39.5, -1.75], [38.97, -1.53], [38.82, -1.18], [38.47, -1.03], [38.32, -0.68], [37.97, -0.53], [37.8, -0.12], [37.5, -0.25]]]]}, "2025-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.97, 0.53], [39.5, 0.75], [40.03, 0.53], [40.25, 0.0], [40.03, -0.53], [39.5, -0.75], [38.97, -0.53], [38.75, 0.0], [38.97, 0.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.5653710151738665}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.531417981763123}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.84033949110244, 25.584305826822913, 26.45396373973182, 24.605765952316005, 27.18050537109383, 28.10193532307943]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.906813557942712, 22.534224446614587, 22.18112462361654, 21.320274607340536, 23.389510091145837, 28.10193532307943]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.056363567703348, -2.0938125870647184, -2.045496298113388, -3.828599285160782, -1.8087796465222965, -1.747491559317723]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.303239189409908, -2.4345770581727493, -2.5824655332324937, -4.5653710151738665, -2.2071238936890722, -1.747491559317723]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.478969349129667, -1.6562294947605984, -1.6885400934915193, -3.059285536317386, -1.494804431091721, -1.3165798793322971]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6407648516389057, -2.1148784230815303, -1.9504703470440432, -3.8825728684546124, -1.6318489103546179, -1.3165798793322971]}}