{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:31.227032", "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": "2019-Apr-21_to_2019-Apr-25_352.0_20.5"}, "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": 2019040000597}, "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": "April 21 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 2019"}, "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": 84061.21236341019}, "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": 20.5}, "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": 352.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "352.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 347.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 355.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.5, 22.25], [-6.97, 22.03], [-6.75, 21.5], [-6.97, 20.97], [-7.5, 20.75], [-8.03, 20.97], [-8.25, 21.5], [-8.03, 22.03], [-7.5, 22.25]]]]}, "2019-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-12.53, 20.53], [-12.0, 20.75], [-11.75, 20.65], [-11.5, 20.75], [-11.0, 20.54], [-10.5, 20.75], [-10.25, 20.65], [-10.0, 20.75], [-9.75, 20.65], [-9.68, 20.68], [-9.53, 21.03], [-9.0, 21.25], [-8.75, 21.15], [-8.68, 21.18], [-8.53, 21.53], [-8.18, 21.68], [-8.03, 22.03], [-7.5, 22.25], [-6.97, 22.03], [-6.82, 21.68], [-6.75, 21.65], [-6.5, 21.75], [-6.25, 21.65], [-6.18, 21.68], [-6.03, 22.03], [-5.5, 22.25], [-5.25, 22.15], [-5.0, 22.25], [-4.47, 22.03], [-4.25, 21.5], [-4.47, 20.97], [-4.82, 20.82], [-4.97, 20.47], [-5.5, 20.25], [-5.75, 20.35], [-6.0, 20.25], [-6.25, 20.35], [-6.5, 20.25], [-6.75, 20.35], [-6.82, 20.32], [-6.97, 19.97], [-7.32, 19.82], [-7.47, 19.47], [-8.0, 19.25], [-8.25, 19.35], [-8.5, 19.25], [-8.75, 19.35], [-9.0, 19.25], [-9.25, 19.35], [-9.32, 19.32], [-9.47, 18.97], [-9.82, 18.82], [-9.97, 18.47], [-10.5, 18.25], [-11.0, 18.46], [-11.5, 18.25], [-11.75, 18.35], [-12.0, 18.25], [-12.53, 18.47], [-12.75, 19.0], [-12.54, 19.5], [-12.75, 20.0], [-12.53, 20.53]]]]}, "2019-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-12.53, 20.53], [-12.0, 20.75], [-11.75, 20.65], [-11.5, 20.75], [-11.0, 20.54], [-10.5, 20.75], [-10.25, 20.65], [-10.0, 20.75], [-9.75, 20.65], [-9.68, 20.68], [-9.53, 21.03], [-9.0, 21.25], [-8.75, 21.15], [-8.68, 21.18], [-8.53, 21.53], [-8.18, 21.68], [-8.03, 22.03], [-7.5, 22.25], [-6.97, 22.03], [-6.82, 21.68], [-6.75, 21.65], [-6.5, 21.75], [-6.25, 21.65], [-6.18, 21.68], [-6.03, 22.03], [-5.5, 22.25], [-5.25, 22.15], [-5.0, 22.25], [-4.47, 22.03], [-4.25, 21.5], [-4.37, 21.2], [-3.97, 21.03], [-3.75, 20.5], [-3.97, 19.97], [-4.5, 19.75], [-4.75, 19.85], [-5.0, 19.75], [-5.53, 19.97], [-5.68, 20.32], [-5.75, 20.35], [-6.0, 20.25], [-6.25, 20.35], [-6.5, 20.25], [-6.75, 20.35], [-6.82, 20.32], [-6.97, 19.97], [-7.32, 19.82], [-7.47, 19.47], [-8.0, 19.25], [-8.25, 19.35], [-8.5, 19.25], [-8.75, 19.35], [-9.0, 19.25], [-9.25, 19.35], [-9.32, 19.32], [-9.47, 18.97], [-9.82, 18.82], [-9.97, 18.47], [-10.5, 18.25], [-11.0, 18.46], [-11.5, 18.25], [-11.75, 18.35], [-12.0, 18.25], [-12.53, 18.47], [-12.75, 19.0], [-12.54, 19.5], [-12.75, 20.0], [-12.53, 20.53]]]]}, "2019-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-12.53, 20.53], [-12.0, 20.75], [-11.75, 20.65], [-11.5, 20.75], [-11.0, 20.54], [-10.5, 20.75], [-10.25, 20.65], [-10.0, 20.75], [-9.75, 20.65], [-9.68, 20.68], [-9.53, 21.03], [-9.0, 21.25], [-8.75, 21.15], [-8.68, 21.18], [-8.53, 21.53], [-8.0, 21.75], [-7.75, 21.65], [-7.5, 21.75], [-7.25, 21.65], [-7.0, 21.75], [-6.75, 21.65], [-6.5, 21.75], [-6.25, 21.65], [-6.18, 21.68], [-6.03, 22.03], [-5.5, 22.25], [-5.25, 22.15], [-5.0, 22.25], [-4.47, 22.03], [-4.25, 21.5], [-4.37, 21.2], [-3.97, 21.03], [-3.75, 20.5], [-3.97, 19.97], [-4.5, 19.75], [-4.75, 19.85], [-5.0, 19.75], [-5.53, 19.97], [-5.68, 20.32], [-5.75, 20.35], [-6.0, 20.25], [-6.25, 20.35], [-6.5, 20.25], [-6.75, 20.35], [-6.82, 20.32], [-6.97, 19.97], [-7.32, 19.82], [-7.47, 19.47], [-8.0, 19.25], [-8.25, 19.35], [-8.5, 19.25], [-8.75, 19.35], [-9.0, 19.25], [-9.25, 19.35], [-9.32, 19.32], [-9.47, 18.97], [-9.82, 18.82], [-9.97, 18.47], [-10.5, 18.25], [-11.0, 18.46], [-11.5, 18.25], [-11.75, 18.35], [-12.0, 18.25], [-12.53, 18.47], [-12.75, 19.0], [-12.54, 19.5], [-12.75, 20.0], [-12.53, 20.53]]]]}, "2019-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.53, 19.97], [-5.75, 20.5], [-5.53, 21.03], [-5.0, 21.25], [-4.75, 21.15], [-4.5, 21.25], [-3.97, 21.03], [-3.75, 20.5], [-3.97, 19.97], [-4.5, 19.75], [-4.75, 19.85], [-5.0, 19.75], [-5.53, 19.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.18059321107944}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.444713225819519}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.690927266289577, 23.944118076019322, 23.784224771671745, 23.98142693468867, 25.683409052315938]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.690927266289577, 22.16983977658498, 22.405075745486045, 22.832819274874794, 25.405559536313945]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.602803332681447, -4.246097225162958, -4.55282529489543, -4.572195869361538, -3.6946021700631206]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.602803332681447, -5.18059321107944, -4.907329085196977, -4.914876716384015, -3.812955483438884]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5168933858794502, -1.4713020008171782, -1.580096094161515, -1.6076295806321415, -1.3354699895440902]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5168933858794502, -1.6627667149732575, -1.7402249213096845, -1.7432920927871174, -1.3765397419543892]}}