{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:21:42.130818", "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-Oct-22_to_2020-Oct-28_6.5_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": 2020100000570}, "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": "October 22 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 28 2020"}, "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": 57086.2355709043}, "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": ["Niger", "Nigeria"]}, "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": 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": 6.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "6.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 5.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 8.25}, "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": 15.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-10-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.97, 12.47], [5.75, 13.0], [5.97, 13.53], [6.5, 13.75], [6.75, 13.65], [7.0, 13.75], [7.53, 13.53], [7.75, 13.0], [7.53, 12.47], [7.0, 12.25], [6.75, 12.35], [6.5, 12.25], [5.97, 12.47]]]]}, "2020-10-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.82, 13.18], [5.97, 13.53], [6.5, 13.75], [6.75, 13.65], [7.0, 13.75], [7.53, 13.53], [7.75, 13.0], [7.53, 12.47], [7.0, 12.25], [6.75, 12.35], [6.68, 12.32], [6.53, 11.97], [6.18, 11.82], [6.03, 11.47], [5.5, 11.25], [4.97, 11.47], [4.75, 12.0], [4.97, 12.53], [5.32, 12.68], [5.47, 13.03], [5.82, 13.18]]]]}, "2020-10-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.82, 13.18], [5.97, 13.53], [6.5, 13.75], [6.75, 13.65], [7.0, 13.75], [7.53, 13.53], [7.75, 13.0], [7.53, 12.47], [7.0, 12.25], [6.75, 12.35], [6.68, 12.32], [6.53, 11.97], [6.18, 11.82], [6.03, 11.47], [5.5, 11.25], [4.97, 11.47], [4.75, 12.0], [4.97, 12.53], [5.32, 12.68], [5.47, 13.03], [5.82, 13.18]]]]}, "2020-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.53, 13.03], [6.75, 12.5], [6.53, 11.97], [6.18, 11.82], [6.03, 11.47], [5.5, 11.25], [4.97, 11.47], [4.75, 12.0], [4.97, 12.53], [5.32, 12.68], [5.47, 13.03], [6.0, 13.25], [6.53, 13.03]]], [[[8.03, 13.03], [8.18, 12.68], [8.53, 12.53], [8.75, 12.0], [8.53, 11.47], [8.0, 11.25], [7.47, 11.47], [7.32, 11.82], [6.97, 11.97], [6.75, 12.5], [6.97, 13.03], [7.5, 13.25], [8.03, 13.03]]]]}, "2020-10-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.85, 15.25], [4.75, 15.5], [4.97, 16.03], [5.5, 16.25], [6.03, 16.03], [6.18, 15.68], [6.53, 15.53], [6.68, 15.18], [7.03, 15.03], [7.18, 14.68], [7.53, 14.53], [7.75, 14.0], [7.54, 13.5], [7.68, 13.18], [8.03, 13.03], [8.18, 12.68], [8.53, 12.53], [8.75, 12.0], [8.53, 11.47], [8.0, 11.25], [7.47, 11.47], [7.32, 11.82], [7.0, 11.96], [6.5, 11.75], [6.25, 11.85], [6.18, 11.82], [6.03, 11.47], [5.5, 11.25], [4.97, 11.47], [4.75, 12.0], [4.97, 12.53], [5.32, 12.68], [5.35, 12.75], [5.32, 12.82], [4.97, 12.97], [4.75, 13.5], [4.96, 14.0], [4.75, 14.5], [4.85, 14.75], [4.75, 15.0], [4.85, 15.25]]]]}, "2020-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.85, 15.25], [4.75, 15.5], [4.97, 16.03], [5.5, 16.25], [6.03, 16.03], [6.18, 15.68], [6.53, 15.53], [6.68, 15.18], [7.03, 15.03], [7.18, 14.68], [7.53, 14.53], [7.75, 14.0], [7.54, 13.5], [7.68, 13.18], [8.03, 13.03], [8.18, 12.68], [8.53, 12.53], [8.75, 12.0], [8.53, 11.47], [8.0, 11.25], [7.47, 11.47], [7.32, 11.82], [7.0, 11.96], [6.5, 11.75], [6.25, 11.85], [6.18, 11.82], [6.03, 11.47], [5.5, 11.25], [4.97, 11.47], [4.75, 12.0], [4.97, 12.53], [5.32, 12.68], [5.35, 12.75], [5.32, 12.82], [4.97, 12.97], [4.75, 13.5], [4.96, 14.0], [4.75, 14.5], [4.85, 14.75], [4.75, 15.0], [4.85, 15.25]]]]}, "2020-10-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.85, 15.25], [4.75, 15.5], [4.97, 16.03], [5.5, 16.25], [6.03, 16.03], [6.18, 15.68], [6.53, 15.53], [6.68, 15.18], [7.03, 15.03], [7.18, 14.68], [7.53, 14.53], [7.75, 14.0], [7.54, 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24.11565338611979, 25.44527130331278]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5310864017617405, -1.8628990168043202, -2.009021649896013, -1.507720047070464, -1.8908861538877684, -2.453343172832798, -2.0797412528571915]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.543273769507664, -2.06376860076233, -2.48048834341256, -1.6293451256486833, -2.371127433035042, -3.1545659385189992, -2.6413617616705096]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3917988876189877, -1.7105802674215163, -1.835587198024208, -1.4024973300394386, -1.5886898812588692, -2.0564423203728106, -1.6857216650400593]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4005680020633924, -1.9200324756044236, -2.2995907171937793, -1.495941621487079, -1.7801006789077882, -2.549176431895152, -1.912786171397206]}}