{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:00.732066", "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-Jan-24_to_2025-Jan-29_46.0_2.5"}, "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": 2025010000648}, "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": "January 24 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 29 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": 64836.621589355695}, "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": ["Somalia"]}, "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": ["Indian 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": 2.5}, "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": 46.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "46.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 44.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 47.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 1.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 4.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[43.46, 2.0], [43.25, 2.5], [43.47, 3.03], [44.0, 3.25], [44.25, 3.15], [44.5, 3.25], [44.8, 3.12], [44.97, 3.53], [45.38, 3.7], [45.25, 4.0], [45.47, 4.53], [46.0, 4.75], [46.5, 4.54], [47.0, 4.75], [47.25, 4.65], [47.5, 4.75], [48.03, 4.53], [48.25, 4.0], [48.03, 3.47], [47.68, 3.32], [47.54, 3.0], [47.75, 2.5], [47.53, 1.97], [47.18, 1.82], [47.03, 1.47], [46.5, 1.25], [46.25, 1.35], [46.0, 1.25], [45.75, 1.35], [45.5, 1.25], [45.25, 1.35], [45.18, 1.32], [45.03, 0.97], [44.5, 0.75], [44.25, 0.85], [44.0, 0.75], [43.47, 0.97], [43.25, 1.5], [43.46, 2.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa", "S.Eastern-Africa", "Equatorial.Indian-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.0, 0.75], [43.47, 0.97], [43.25, 1.5], [43.47, 2.03], [44.0, 2.25], [44.25, 2.15], [44.32, 2.18], [44.47, 2.53], [44.82, 2.68], [44.97, 3.03], [45.5, 3.25], [45.75, 3.15], [46.0, 3.25], [46.53, 3.03], [46.75, 2.5], [46.53, 1.97], [46.18, 1.82], [46.03, 1.47], [45.5, 1.25], [45.25, 1.35], [45.18, 1.32], [45.03, 0.97], [44.5, 0.75], [44.25, 0.85], [44.0, 0.75]]]]}, "2025-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.25, 2.5], [43.47, 3.03], [44.0, 3.25], [44.25, 3.15], [44.5, 3.25], [44.8, 3.12], [44.97, 3.53], [45.38, 3.7], [45.25, 4.0], [45.47, 4.53], [46.0, 4.75], [46.5, 4.54], [47.0, 4.75], [47.25, 4.65], [47.5, 4.75], [48.03, 4.53], [48.25, 4.0], [48.03, 3.47], [47.68, 3.32], [47.53, 2.97], [47.18, 2.82], [47.15, 2.75], [47.25, 2.5], [47.15, 2.25], [47.25, 2.0], [47.03, 1.47], [46.5, 1.25], [46.25, 1.35], [46.0, 1.25], [45.75, 1.35], [45.5, 1.25], [45.25, 1.35], [45.18, 1.32], [45.03, 0.97], [44.5, 0.75], [44.25, 0.85], [44.0, 0.75], [43.47, 0.97], [43.25, 1.5], [43.46, 2.0], [43.25, 2.5]]]]}, "2025-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.25, 2.5], [43.47, 3.03], [44.0, 3.25], [44.25, 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3.0], [47.75, 2.5], [47.53, 1.97], [47.18, 1.82], [47.03, 1.47], [46.5, 1.25], [46.25, 1.35], [46.0, 1.25], [45.75, 1.35], [45.5, 1.25], [44.97, 1.47], [44.75, 2.0], [44.97, 2.53], [45.32, 2.68], [45.47, 3.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.2094357522358337}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.810633920083595}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.973678419325097, 25.76494725545257, 25.870984649658226, 25.952421049087718, 25.4837646484375, 25.499529774983728]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.431062316894554, 25.039853668212913, 25.167310333251976, 25.203626251220726, 25.244165039062523, 25.398699696858728]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.6776844723982265, -0.9825072123103297, -0.8827899144226109, -0.7665484170695626, -0.6555399222437245, -0.5429416694986932]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.7561705241202503, -1.2094357522358337, -1.1780999666435719, -1.0247928438482745, -0.7569027597261311, -0.6471427654790318]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3216354477048198, -1.7446245913686453, -1.5877891049165636, -1.466328908525203, -1.463171592669584, -1.2396794060008802]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4738045550725196, -2.2281096813089283, -2.107057185374028, -1.9181168519503238, -1.6310305952114583, -1.4924787170338836]}}