{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:09.320754", "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-Jan-02_to_2023-Jan-06_49.5_7.5"}, "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": 2023010000217}, "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 02 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 06 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 64152.54300591373}, "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": 7.5}, "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": 49.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "49.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 48.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 49.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 7.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 10.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[50.03, 6.97], [49.5, 6.75], [49.25, 6.85], [49.0, 6.75], [48.75, 6.85], [48.5, 6.75], [47.97, 6.97], [47.82, 7.32], [47.47, 7.47], [47.25, 8.0], [47.35, 8.25], [47.25, 8.5], [47.46, 9.0], [47.25, 9.5], [47.35, 9.75], [47.25, 10.0], [47.47, 10.53], [48.0, 10.75], [48.25, 10.65], [48.5, 10.75], [49.0, 10.54], [49.5, 10.75], [50.03, 10.53], [50.25, 10.0], [50.15, 9.75], [50.25, 9.5], [50.15, 9.25], [50.25, 9.0], [50.15, 8.75], [50.25, 8.5], [50.15, 8.25], [50.25, 8.0], [50.15, 7.75], [50.25, 7.5], [50.03, 6.97]]]]}}, "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": {"2023-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.75, 8.0], [47.85, 8.25], [47.75, 8.5], [47.85, 8.75], [47.75, 9.0], [47.88, 9.3], [47.47, 9.47], [47.25, 10.0], [47.47, 10.53], [48.0, 10.75], [48.53, 10.53], [48.7, 10.13], [48.82, 10.18], [48.97, 10.53], [49.5, 10.75], [50.03, 10.53], [50.25, 10.0], [50.15, 9.75], [50.25, 9.5], [50.15, 9.25], [50.25, 9.0], [50.15, 8.75], [50.25, 8.5], [50.15, 8.25], [50.25, 8.0], [50.15, 7.75], [50.25, 7.5], [50.03, 6.97], [49.5, 6.75], [49.25, 6.85], [49.0, 6.75], [48.75, 6.85], [48.5, 6.75], [47.97, 6.97], [47.75, 7.5], [47.85, 7.75], [47.75, 8.0]]]]}, "2023-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.25, 8.5], [47.46, 9.0], [47.25, 9.5], [47.35, 9.75], [47.25, 10.0], [47.47, 10.53], [48.0, 10.75], [48.25, 10.65], [48.5, 10.75], [49.0, 10.54], [49.5, 10.75], [50.03, 10.53], [50.25, 10.0], [50.15, 9.75], [50.25, 9.5], [50.15, 9.25], [50.25, 9.0], [50.15, 8.75], [50.25, 8.5], [50.15, 8.25], [50.25, 8.0], [50.15, 7.75], [50.25, 7.5], [50.03, 6.97], [49.5, 6.75], [49.25, 6.85], [49.0, 6.75], [48.75, 6.85], [48.5, 6.75], [47.97, 6.97], [47.82, 7.32], [47.47, 7.47], [47.25, 8.0], [47.35, 8.25], [47.25, 8.5]]]]}, "2023-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.25, 8.5], [47.46, 9.0], [47.25, 9.5], [47.35, 9.75], [47.25, 10.0], [47.47, 10.53], [48.0, 10.75], [48.25, 10.65], [48.5, 10.75], [49.0, 10.54], [49.5, 10.75], [50.03, 10.53], [50.25, 10.0], [50.15, 9.75], [50.25, 9.5], [50.15, 9.25], [50.25, 9.0], [50.15, 8.75], [50.25, 8.5], [50.15, 8.25], [50.25, 8.0], [50.15, 7.75], [50.25, 7.5], [50.03, 6.97], [49.5, 6.75], [49.25, 6.85], [49.0, 6.75], [48.75, 6.85], [48.5, 6.75], [47.97, 6.97], [47.82, 7.32], [47.47, 7.47], [47.25, 8.0], [47.35, 8.25], [47.25, 8.5]]]]}, "2023-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.25, 8.5], [47.46, 9.0], [47.25, 9.5], [47.35, 9.75], [47.25, 10.0], [47.47, 10.53], [48.0, 10.75], [48.25, 10.65], [48.5, 10.75], [49.0, 10.54], [49.5, 10.75], [50.03, 10.53], [50.25, 10.0], [50.15, 9.75], [50.25, 9.5], [50.15, 9.25], [50.25, 9.0], [50.15, 8.75], [50.25, 8.5], [50.15, 8.25], [50.25, 8.0], [50.15, 7.75], [50.25, 7.5], [50.03, 6.97], [49.5, 6.75], [49.25, 6.85], [49.0, 6.75], [48.47, 6.97], [48.32, 7.32], [48.25, 7.35], [48.0, 7.25], [47.47, 7.47], [47.25, 8.0], [47.35, 8.25], [47.25, 8.5]]]]}, "2023-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.97, 8.03], [49.5, 8.25], [50.03, 8.03], [50.25, 7.5], [50.03, 6.97], [49.5, 6.75], [48.97, 6.97], [48.75, 7.5], [48.97, 8.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.768549675167378}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6911757178086533}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.75079123857347, 19.975969753741765, 20.304375218114387, 20.367063082945776, 23.751602712958004]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.35773234242197, 17.155358169586975, 17.498955235112078, 17.849378256560442, 23.751602712958004]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4637834555630995, -1.9666121384829445, -1.7437518774099448, -1.563018598464046, -0.876172995497825]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.824728883354453, -2.768549675167378, -2.3188837076825735, -1.938240193208344, -0.876172995497825]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4362325217790384, -1.8199321081945983, -1.6127557444073906, -1.4925302419884623, -1.2668707711552696]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6983045728640669, -2.2108023237460674, -2.038828830748577, -1.878640787837343, -1.2668707711552696]}}