{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:50.791053", "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": "2017-May-31_to_2017-Jun-02_352.5_21.5"}, "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": 2017050000812}, "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": "May 31 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 02 2017"}, "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": 83546.06268687581}, "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"]}, "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": 21.5}, "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": 352.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "352.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 350.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 354.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 22.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-05-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.65, 20.75], [-9.75, 21.0], [-9.65, 21.25], [-9.75, 21.5], [-9.53, 22.03], [-9.18, 22.18], [-9.03, 22.53], [-8.5, 22.75], [-8.25, 22.65], [-8.0, 22.75], [-7.75, 22.65], [-7.5, 22.75], [-7.25, 22.65], [-7.0, 22.75], [-6.75, 22.65], [-6.68, 22.68], [-6.53, 23.03], [-6.0, 23.25], [-5.47, 23.03], [-5.25, 22.5], [-5.35, 22.25], [-5.32, 22.18], [-4.97, 22.03], [-4.75, 21.5], [-4.97, 20.97], [-5.32, 20.82], [-5.47, 20.47], [-6.0, 20.25], [-6.25, 20.35], [-6.32, 20.32], [-6.47, 19.97], [-7.0, 19.75], [-7.25, 19.85], [-7.5, 19.75], [-7.75, 19.85], [-7.82, 19.82], [-7.97, 19.47], [-8.5, 19.25], [-8.75, 19.35], [-9.0, 19.25], [-9.53, 19.47], [-9.75, 20.0], [-9.65, 20.25], [-9.75, 20.5], [-9.65, 20.75]]]]}, "2017-06-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.65, 20.75], [-9.75, 21.0], [-9.65, 21.25], [-9.75, 21.5], [-9.53, 22.03], [-9.18, 22.18], [-9.03, 22.53], [-8.5, 22.75], [-8.25, 22.65], [-8.0, 22.75], [-7.75, 22.65], [-7.5, 22.75], [-7.25, 22.65], [-7.0, 22.75], [-6.75, 22.65], [-6.68, 22.68], [-6.53, 23.03], [-6.0, 23.25], [-5.47, 23.03], [-5.25, 22.5], [-5.35, 22.25], [-5.32, 22.18], [-4.97, 22.03], [-4.75, 21.5], [-4.97, 20.97], [-5.32, 20.82], [-5.47, 20.47], [-6.0, 20.25], [-6.25, 20.35], [-6.32, 20.32], [-6.47, 19.97], [-7.0, 19.75], [-7.25, 19.85], [-7.5, 19.75], [-7.75, 19.85], [-7.82, 19.82], [-7.97, 19.47], [-8.5, 19.25], [-8.75, 19.35], [-9.0, 19.25], [-9.53, 19.47], [-9.75, 20.0], [-9.65, 20.25], [-9.75, 20.5], [-9.65, 20.75]]]]}, "2017-06-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.65, 20.75], [-9.75, 21.0], [-9.65, 21.25], [-9.75, 21.5], [-9.53, 22.03], [-9.18, 22.18], [-9.03, 22.53], [-8.5, 22.75], [-8.25, 22.65], [-8.0, 22.75], [-7.75, 22.65], [-7.5, 22.75], [-7.25, 22.65], [-7.0, 22.75], [-6.75, 22.65], [-6.68, 22.68], [-6.53, 23.03], [-6.0, 23.25], [-5.47, 23.03], [-5.25, 22.5], [-5.35, 22.25], [-5.32, 22.18], [-4.97, 22.03], [-4.75, 21.5], [-4.97, 20.97], [-5.32, 20.82], [-5.47, 20.47], [-6.0, 20.25], [-6.25, 20.35], [-6.32, 20.32], [-6.47, 19.97], [-7.0, 19.75], [-7.25, 19.85], [-7.5, 19.75], [-7.75, 19.85], [-7.82, 19.82], [-7.97, 19.47], [-8.5, 19.25], [-8.75, 19.35], [-9.0, 19.25], [-9.53, 19.47], [-9.75, 20.0], [-9.65, 20.25], [-9.75, 20.5], [-9.65, 20.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.975312235861907}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6632394238334953}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.002735449835995, 28.5332664823722, 30.008094847087875]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.472052798002494, 26.622417727674588, 28.13476422028009]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.641135546914188, -4.328077320055934, -3.020505404530364]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.405060628509204, -4.975312235861907, -3.6008817947256944]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6070999082813544, -2.0293170421044575, -1.4704925876482715]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8679025203816506, -2.1477179973831793, -1.5920716198559988]}}