{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:19.454418", "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-Nov-02_to_2017-Nov-08_1.0_13.0"}, "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": 2017110000172}, "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 02 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 08 2017"}, "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": 51187.08473393387}, "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": ["Benin", "Burkina Faso", "Niger"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": 13.0}, "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": 1.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "1.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 0.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 3.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 14.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.0, 13.75], [1.53, 13.53], [1.75, 13.0], [1.65, 12.75], [1.75, 12.5], [1.53, 11.97], [1.0, 11.75], [0.75, 11.85], [0.5, 11.75], [-0.03, 11.97], [-0.25, 12.5], [-0.03, 13.03], [0.32, 13.18], [0.47, 13.53], [1.0, 13.75]]]]}, "2017-11-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.0, 13.75], [1.53, 13.53], [1.75, 13.0], [1.65, 12.75], [1.75, 12.5], [1.53, 11.97], [1.0, 11.75], [0.75, 11.85], [0.5, 11.75], [-0.03, 11.97], [-0.25, 12.5], [-0.03, 13.03], [0.32, 13.18], [0.47, 13.53], [1.0, 13.75]]]]}, "2017-11-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.0, 13.75], [1.53, 13.53], [1.75, 13.0], [1.65, 12.75], [1.75, 12.5], [1.53, 11.97], [1.0, 11.75], [0.75, 11.85], [0.5, 11.75], [-0.03, 11.97], [-0.25, 12.5], [-0.03, 13.03], [0.32, 13.18], [0.47, 13.53], [1.0, 13.75]]]]}, "2017-11-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.47, 11.97], [2.25, 12.5], [2.47, 13.03], [3.0, 13.25], [3.53, 13.03], [3.75, 12.5], [3.53, 11.97], [3.0, 11.75], [2.47, 11.97]]], [[[0.47, 12.97], [0.25, 13.5], [0.47, 14.03], [1.0, 14.25], [1.53, 14.03], [1.75, 13.5], [1.53, 12.97], [1.0, 12.75], [0.47, 12.97]]]]}, "2017-11-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.82, 14.18], [0.97, 14.53], [1.5, 14.75], [1.75, 14.65], [2.0, 14.75], [2.53, 14.53], [2.68, 14.18], [3.03, 14.03], [3.18, 13.68], [3.53, 13.53], [3.75, 13.0], [3.65, 12.75], [3.75, 12.5], [3.65, 12.25], [3.75, 12.0], [3.53, 11.47], [3.0, 11.25], [2.47, 11.47], [2.32, 11.82], [1.97, 11.97], [1.82, 12.32], [1.75, 12.35], [1.5, 12.25], [1.25, 12.35], [1.0, 12.25], [0.75, 12.35], [0.5, 12.25], [-0.03, 12.47], [-0.25, 13.0], [-0.03, 13.53], [0.32, 13.68], [0.47, 14.03], [0.82, 14.18]]]]}, "2017-11-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.82, 14.18], [0.97, 14.53], [1.5, 14.75], [1.75, 14.65], [2.0, 14.75], [2.53, 14.53], [2.68, 14.18], [3.03, 14.03], [3.18, 13.68], [3.53, 13.53], [3.75, 13.0], [3.65, 12.75], [3.75, 12.5], [3.65, 12.25], [3.75, 12.0], [3.53, 11.47], [3.0, 11.25], [2.47, 11.47], [2.32, 11.82], [1.97, 11.97], [1.82, 12.32], [1.75, 12.35], [1.5, 12.25], [1.25, 12.35], [1.0, 12.25], [0.75, 12.35], [0.5, 12.25], [-0.03, 12.47], [-0.25, 13.0], [-0.03, 13.53], [0.32, 13.68], [0.47, 14.03], [0.82, 14.18]]]]}, "2017-11-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.82, 14.18], [0.97, 14.53], [1.5, 14.75], [1.75, 14.65], [2.0, 14.75], [2.53, 14.53], [2.68, 14.18], [3.03, 14.03], [3.18, 13.68], [3.53, 13.53], [3.75, 13.0], [3.54, 12.5], [3.75, 12.0], [3.53, 11.47], [3.0, 11.25], [2.47, 11.47], [2.32, 11.82], [1.97, 11.97], [1.82, 12.32], [1.75, 12.35], [1.5, 12.25], [1.25, 12.35], [1.0, 12.25], [0.75, 12.35], [0.5, 12.25], [-0.03, 12.47], [-0.25, 13.0], [-0.03, 13.53], [0.32, 13.68], [0.47, 14.03], [0.82, 14.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.7342894285207535}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1293407155323085}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.51916005143886, 27.883481284486322, 27.678950065933407, 27.272130105640997, 26.99631412414726, 26.763885194046736, 26.665426378742723]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.19182343598351, 27.657348622617974, 27.492510326987656, 27.262217708131686, 26.192978763683698, 25.83886242512125, 25.911856670386612]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.224583942215683, -1.7649081628641738, -1.834413270975593, -1.7481467883989694, -2.077743040197663, -2.225913557073549, -2.2564914778746066]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.274592755709648, -1.9668692739230664, -1.9739744800057792, -1.8864620047749554, -2.4887751214929494, -2.7342894285207535, -2.642614177742473]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0030858485254353, -1.5671255024707305, -1.5983147768298511, -1.2931820543218149, -1.5046535089433632, -1.6020566503242821, -1.5814654160734514]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0959775443390236, -1.6566833980324465, -1.634377391461933, -1.3263184298507145, -1.6947373243137691, -1.865338627962929, -1.9100947182393344]}}