{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:14.077885", "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": "2013-Jan-04_to_2013-Jan-06_354.0_15.0"}, "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": 2013010000224}, "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 04 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 06 2013"}, "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": 89342.33632565395}, "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": ["Mali", "Mauritania"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-Africa"]}, "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": 15.0}, "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": 354.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "354.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 352.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 358.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.53, 16.53], [-7.0, 16.75], [-6.75, 16.65], [-6.5, 16.75], [-6.25, 16.65], [-6.0, 16.75], [-5.75, 16.65], [-5.5, 16.75], [-5.25, 16.65], [-5.0, 16.75], [-4.75, 16.65], [-4.5, 16.75], [-4.25, 16.65], [-4.0, 16.75], [-3.75, 16.65], [-3.5, 16.75], [-3.25, 16.65], [-3.0, 16.75], [-2.75, 16.65], [-2.68, 16.68], [-2.53, 17.03], [-2.0, 17.25], [-1.47, 17.03], [-1.25, 16.5], [-1.47, 15.97], [-1.82, 15.82], [-1.85, 15.75], [-1.75, 15.5], [-1.85, 15.25], [-1.75, 15.0], [-1.97, 14.47], [-2.5, 14.25], [-2.75, 14.35], [-3.0, 14.25], [-3.25, 14.35], [-3.5, 14.25], [-3.75, 14.35], [-4.0, 14.25], [-4.25, 14.35], [-4.32, 14.32], [-4.47, 13.97], [-5.0, 13.75], [-5.53, 13.97], [-5.68, 14.32], [-5.75, 14.35], [-6.0, 14.25], [-6.53, 14.47], [-6.68, 14.82], [-6.75, 14.85], [-7.0, 14.75], [-7.53, 14.97], [-7.75, 15.5], [-7.65, 15.75], [-7.75, 16.0], [-7.53, 16.53]]]]}, "2013-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.53, 16.53], [-7.0, 16.75], [-6.75, 16.65], [-6.5, 16.75], [-6.25, 16.65], [-6.0, 16.75], [-5.75, 16.65], [-5.5, 16.75], [-5.25, 16.65], [-5.0, 16.75], [-4.75, 16.65], [-4.5, 16.75], [-4.25, 16.65], [-4.0, 16.75], [-3.75, 16.65], [-3.5, 16.75], [-3.25, 16.65], [-3.0, 16.75], [-2.75, 16.65], [-2.68, 16.68], [-2.53, 17.03], [-2.0, 17.25], [-1.47, 17.03], [-1.25, 16.5], [-1.47, 15.97], [-1.82, 15.82], [-1.85, 15.75], [-1.75, 15.5], [-1.85, 15.25], [-1.75, 15.0], [-1.97, 14.47], [-2.5, 14.25], [-2.75, 14.35], [-3.0, 14.25], [-3.25, 14.35], [-3.5, 14.25], [-3.75, 14.35], [-4.0, 14.25], [-4.25, 14.35], [-4.32, 14.32], [-4.47, 13.97], [-5.0, 13.75], [-5.53, 13.97], [-5.68, 14.32], [-5.75, 14.35], [-6.0, 14.25], [-6.53, 14.47], [-6.68, 14.82], [-6.75, 14.85], [-7.0, 14.75], [-7.53, 14.97], [-7.75, 15.5], [-7.65, 15.75], [-7.75, 16.0], [-7.53, 16.53]]]]}, "2013-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.53, 16.53], [-7.0, 16.75], [-6.75, 16.65], [-6.5, 16.75], [-6.25, 16.65], [-6.0, 16.75], [-5.75, 16.65], [-5.5, 16.75], [-5.25, 16.65], [-5.0, 16.75], [-4.75, 16.65], [-4.5, 16.75], [-4.25, 16.65], [-4.0, 16.75], [-3.75, 16.65], [-3.5, 16.75], [-3.25, 16.65], [-3.0, 16.75], [-2.75, 16.65], [-2.68, 16.68], [-2.53, 17.03], [-2.0, 17.25], [-1.47, 17.03], [-1.25, 16.5], [-1.47, 15.97], [-1.82, 15.82], [-1.85, 15.75], [-1.75, 15.5], [-1.85, 15.25], [-1.75, 15.0], [-1.97, 14.47], [-2.5, 14.25], [-2.75, 14.35], [-3.0, 14.25], [-3.25, 14.35], [-3.5, 14.25], [-3.75, 14.35], [-4.0, 14.25], [-4.25, 14.35], [-4.32, 14.32], [-4.47, 13.97], [-5.0, 13.75], [-5.53, 13.97], [-5.68, 14.32], [-5.75, 14.35], [-6.0, 14.25], [-6.53, 14.47], [-6.68, 14.82], [-6.75, 14.85], [-7.0, 14.75], [-7.53, 14.97], [-7.75, 15.5], [-7.65, 15.75], [-7.75, 16.0], [-7.53, 16.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.139219132966446}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.604285230679041}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.795949488467784, 17.69323793016656, 18.503926761140406]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.48236819944509, 16.413677720077317, 17.446147410497815]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.131530351522315, -4.242651626022753, -3.4386737144920554]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5982832787253756, -5.139219132966446, -4.048083512218568]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4297369102123116, -1.9778825995444518, -1.6285465349574653]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5890529480286473, -2.1760548042623453, -1.9002542900018549]}}