{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:58.851701", "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": "2023-Nov-09_to_2023-Nov-15_47.0_5.5"}, "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": 2023110000232}, "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": "November 09 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 15 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 83004.16006375226}, "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", "Somalia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 5.5}, "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": 47.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "47.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 45.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 48.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 4.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 7.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[46.0, 4.25], [45.47, 4.47], [45.32, 4.82], [44.97, 4.97], [44.75, 5.5], [44.85, 5.75], [44.75, 6.0], [44.97, 6.53], [45.32, 6.68], [45.47, 7.03], [46.0, 7.25], [46.25, 7.15], [46.32, 7.18], [46.47, 7.53], [47.0, 7.75], [47.25, 7.65], [47.5, 7.75], [47.75, 7.65], [48.0, 7.75], [48.25, 7.65], [48.5, 7.75], [49.03, 7.53], [49.25, 7.0], [49.15, 6.75], [49.25, 6.5], [49.03, 5.97], [48.68, 5.82], [48.65, 5.75], [48.75, 5.5], [48.53, 4.97], [48.18, 4.82], [48.03, 4.47], [47.68, 4.32], [47.53, 3.97], [47.0, 3.75], [46.47, 3.97], [46.32, 4.32], [46.25, 4.35], [46.0, 4.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-11-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.97, 7.53], [48.5, 7.75], [49.03, 7.53], [49.25, 7.0], [49.15, 6.75], [49.25, 6.5], [49.03, 5.97], [48.5, 5.75], [48.25, 5.85], [48.0, 5.75], [47.47, 5.97], [47.25, 6.5], [47.47, 7.03], [47.82, 7.18], [47.97, 7.53]]]]}, "2023-11-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.75, 6.0], [44.97, 6.53], [45.32, 6.68], [45.47, 7.03], [46.0, 7.25], [46.25, 7.15], [46.32, 7.18], [46.47, 7.53], [47.0, 7.75], [47.25, 7.65], [47.5, 7.75], [47.75, 7.65], [48.0, 7.75], [48.25, 7.65], [48.5, 7.75], [49.03, 7.53], [49.25, 7.0], [49.15, 6.75], [49.25, 6.5], [49.03, 5.97], [48.68, 5.82], [48.65, 5.75], [48.75, 5.5], [48.53, 4.97], [48.18, 4.82], [48.03, 4.47], [47.68, 4.32], [47.53, 3.97], [47.0, 3.75], [46.47, 3.97], [46.32, 4.32], [46.25, 4.35], [46.0, 4.25], [45.47, 4.47], [45.32, 4.82], [44.97, 4.97], [44.75, 5.5], [44.85, 5.75], [44.75, 6.0]]]]}, "2023-11-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.75, 6.0], [44.97, 6.53], [45.32, 6.68], [45.47, 7.03], [46.0, 7.25], [46.25, 7.15], [46.32, 7.18], [46.47, 7.53], [47.0, 7.75], [47.25, 7.65], [47.5, 7.75], [47.75, 7.65], [48.0, 7.75], [48.25, 7.65], [48.5, 7.75], [49.03, 7.53], [49.25, 7.0], [49.15, 6.75], [49.25, 6.5], [49.03, 5.97], [48.68, 5.82], [48.65, 5.75], [48.75, 5.5], [48.53, 4.97], [48.18, 4.82], [48.03, 4.47], [47.68, 4.32], [47.53, 3.97], [47.0, 3.75], [46.47, 3.97], [46.32, 4.32], [46.25, 4.35], [46.0, 4.25], [45.47, 4.47], [45.32, 4.82], [44.97, 4.97], [44.75, 5.5], [44.85, 5.75], [44.75, 6.0]]]]}, "2023-11-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.75, 6.0], [44.97, 6.53], [45.32, 6.68], [45.47, 7.03], [46.0, 7.25], [46.25, 7.15], [46.32, 7.18], [46.47, 7.53], [47.0, 7.75], [47.25, 7.65], [47.5, 7.75], [47.75, 7.65], [48.0, 7.75], [48.53, 7.53], [48.68, 7.18], [49.03, 7.03], [49.25, 6.5], [49.03, 5.97], [48.68, 5.82], [48.65, 5.75], [48.75, 5.5], [48.53, 4.97], [48.18, 4.82], [48.03, 4.47], [47.68, 4.32], [47.53, 3.97], [47.0, 3.75], [46.47, 3.97], [46.32, 4.32], [46.25, 4.35], [46.0, 4.25], [45.47, 4.47], [45.32, 4.82], [44.97, 4.97], [44.75, 5.5], [44.85, 5.75], [44.75, 6.0]]]]}, "2023-11-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.97, 6.03], [46.32, 6.18], [46.47, 6.53], [47.0, 6.75], [47.53, 6.53], [47.68, 6.18], [48.03, 6.03], [48.25, 5.5], [48.03, 4.97], [47.68, 4.82], [47.53, 4.47], [47.0, 4.25], [46.75, 4.35], [46.5, 4.25], [46.25, 4.35], [46.0, 4.25], [45.47, 4.47], [45.25, 5.0], [45.47, 5.53], [45.82, 5.68], [45.97, 6.03]]]]}, "2023-11-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.25, 6.0], [46.47, 6.53], [47.0, 6.75], [47.53, 6.53], [47.68, 6.18], [48.03, 6.03], [48.25, 5.5], [48.03, 4.97], [47.5, 4.75], [47.25, 4.85], [47.0, 4.75], [46.47, 4.97], [46.25, 5.5], [46.35, 5.75], [46.25, 6.0]]]]}, "2023-11-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.25, 6.0], [46.47, 6.53], [47.0, 6.75], [47.53, 6.53], [47.75, 6.0], [47.65, 5.75], [47.75, 5.5], [47.53, 4.97], [47.0, 4.75], [46.47, 4.97], [46.25, 5.5], [46.35, 5.75], [46.25, 6.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.3624091244222996}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.477523735682933}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.3397006634238, 23.03223218575198, 23.802645367460457, 24.713476731955552, 25.067072289410703, 25.122894095641357, 25.100681315906286]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.163965938996682, 21.914751618119453, 22.941726566861178, 24.114118646350448, 24.701354338090653, 24.900229703711375, 25.056848246282925]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2351216319415055, -3.455229166860062, -2.6737050465505185, -1.7535001303536257, -1.7560783945571237, -1.652598081674796, -1.6684099179249472]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.379364457729821, -4.3624091244222996, -3.13512731439198, -2.1222412241928055, -2.0580598098520113, -1.7876703336755781, -1.6956367140831503]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4793016286375555, -3.3433851529770693, -2.5977943513545037, -1.7129564955125067, -1.6508680505414586, -1.6139120601243102, -1.592795060423715]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5130743558124495, -4.13181773848413, -2.9085254009734993, -2.070878394838282, -1.8259723695630932, -1.6599055490188384, -1.710159918346967]}}