{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:18:32.853290", "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": "2020-Jan-28_to_2020-Jan-31_50.0_11.5"}, "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": 2020010000726}, "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 28 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 31 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 120877.86482840542}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-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": ["Arabian Sea", "Gulf of Aden"]}, "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": 11.5}, "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": 50.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "50.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 48.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 51.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 9.25}, "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": {"2020-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.35, 12.75], [48.25, 13.0], [48.47, 13.53], [48.82, 13.68], [48.97, 14.03], [49.32, 14.18], [49.47, 14.53], [50.0, 14.75], [50.25, 14.65], [50.5, 14.75], [50.75, 14.65], [51.0, 14.75], [51.25, 14.65], [51.5, 14.75], [52.03, 14.53], [52.25, 14.0], [52.15, 13.75], [52.25, 13.5], [52.03, 12.97], [51.68, 12.82], [51.65, 12.75], [51.75, 12.5], [51.65, 12.25], [51.75, 12.0], [51.65, 11.75], [51.75, 11.5], [51.65, 11.25], [51.75, 11.0], [51.53, 10.47], [51.13, 10.3], [51.25, 10.0], [51.03, 9.47], [50.68, 9.32], [50.53, 8.97], [50.0, 8.75], [49.47, 8.97], [49.25, 9.5], [49.35, 9.75], [49.25, 10.0], [49.47, 10.53], [49.88, 10.7], [49.82, 10.82], [49.47, 10.97], [49.32, 11.32], [49.25, 11.35], [49.0, 11.25], [48.47, 11.47], [48.25, 12.0], [48.35, 12.25], [48.25, 12.5], [48.35, 12.75]]]]}, "2020-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.46, 11.5], [48.25, 12.0], [48.35, 12.25], [48.25, 12.5], [48.35, 12.75], [48.25, 13.0], [48.47, 13.53], [48.82, 13.68], [48.97, 14.03], [49.32, 14.18], [49.47, 14.53], [50.0, 14.75], [50.25, 14.65], [50.5, 14.75], [50.75, 14.65], [51.0, 14.75], [51.25, 14.65], [51.5, 14.75], [52.03, 14.53], [52.25, 14.0], [52.15, 13.75], [52.25, 13.5], [52.03, 12.97], [51.68, 12.82], [51.65, 12.75], [51.75, 12.5], [51.65, 12.25], [51.75, 12.0], [51.65, 11.75], [51.75, 11.5], [51.65, 11.25], [51.75, 11.0], [51.53, 10.47], [51.13, 10.3], [51.25, 10.0], [51.03, 9.47], [50.68, 9.32], [50.53, 8.97], [50.0, 8.75], [49.47, 8.97], [49.32, 9.32], [48.97, 9.47], [48.82, 9.82], [48.47, 9.97], [48.25, 10.5], [48.35, 10.75], [48.25, 11.0], [48.46, 11.5]]]]}, "2020-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.46, 11.5], [48.25, 12.0], [48.35, 12.25], [48.25, 12.5], [48.35, 12.75], [48.25, 13.0], [48.47, 13.53], [48.82, 13.68], [48.97, 14.03], [49.32, 14.18], [49.47, 14.53], [50.0, 14.75], [50.25, 14.65], [50.5, 14.75], [50.75, 14.65], [51.0, 14.75], [51.25, 14.65], [51.5, 14.75], [52.03, 14.53], [52.25, 14.0], [52.15, 13.75], [52.25, 13.5], [52.03, 12.97], [51.68, 12.82], [51.65, 12.75], [51.75, 12.5], [51.65, 12.25], [51.75, 12.0], [51.65, 11.75], [51.75, 11.5], [51.65, 11.25], [51.75, 11.0], [51.53, 10.47], [51.13, 10.3], [51.25, 10.0], [51.03, 9.47], [50.68, 9.32], [50.53, 8.97], [50.0, 8.75], [49.47, 8.97], [49.32, 9.32], [48.97, 9.47], [48.82, 9.82], [48.47, 9.97], [48.25, 10.5], [48.35, 10.75], [48.25, 11.0], [48.46, 11.5]]]]}, "2020-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.47, 11.53], [48.82, 11.68], [48.97, 12.03], [49.5, 12.25], [49.75, 12.15], [50.0, 12.25], [50.25, 12.15], [50.5, 12.25], [51.03, 12.03], [51.25, 11.5], [51.15, 11.25], [51.25, 11.0], [51.03, 10.47], [50.68, 10.32], [50.65, 10.25], [50.75, 10.0], [50.53, 9.47], [50.0, 9.25], [49.75, 9.35], [49.5, 9.25], [48.97, 9.47], [48.82, 9.82], [48.47, 9.97], [48.25, 10.5], [48.35, 10.75], [48.25, 11.0], [48.47, 11.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.7047573797136693}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.3663223194577585}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.408405407198813, 21.741990012962788, 21.86959073525901, 19.690557862682965]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.53112996579938, 16.416986600833923, 16.17209875491494, 16.527131162283922]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.294885857737622, -1.429820073442977, -1.3038312882882934, -1.5534638079922776]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.9200399020647865, -2.265660702227592, -2.7047573797136693, -1.9375361907449928]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.956778914651648, -1.864787008987054, -1.6090442435583963, -1.3632570093901446]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.9260993930039128, -2.687850004963178, -2.2154740355508253, -1.5404911661491172]}}