{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:27.287825", "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": "2022-Feb-17_to_2022-Feb-21_28.0_-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": 2022020000716}, "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": "February 17 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 21 2022"}, "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": 93815.45957963417}, "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": ["Angola", "Congo, The Democratic Republic of the", "Zambia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "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": 28.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "28.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 24.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 28.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -14.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -10.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[28.68, -12.82], [29.03, -12.97], [29.25, -13.5], [29.15, -13.75], [29.25, -14.0], [29.03, -14.53], [28.5, -14.75], [27.97, -14.53], [27.75, -14.0], [27.85, -13.75], [27.82, -13.68], [27.47, -13.53], [27.32, -13.18], [26.97, -13.03], [26.82, -12.68], [26.75, -12.65], [26.68, -12.68], [26.53, -13.03], [26.0, -13.25], [25.47, -13.03], [25.32, -12.68], [25.25, -12.65], [25.0, -12.75], [24.47, -12.53], [24.32, -12.18], [23.97, -12.03], [23.82, -11.68], [23.47, -11.53], [23.25, -11.0], [23.47, -10.47], [24.0, -10.25], [24.25, -10.35], [24.5, -10.25], [24.75, -10.35], [24.82, -10.32], [24.97, -9.97], [25.5, -9.75], [26.03, -9.97], [26.2, -10.37], [26.5, -10.25], [26.75, -10.35], [27.0, -10.25], [27.25, -10.35], [27.5, -10.25], [27.75, -10.35], [28.0, -10.25], [28.53, -10.47], [28.68, -10.82], [29.03, -10.97], [29.25, -11.5], [29.15, -11.75], [29.25, -12.0], [29.03, -12.53], [28.63, -12.7], [28.68, -12.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "W.Southern-Africa", "E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, -13.53], [27.25, -13.0], [27.47, -12.47], [28.0, -12.25], [28.53, -12.47], [28.68, -12.82], [29.03, -12.97], [29.25, -13.5], [29.15, -13.75], [29.25, -14.0], [29.03, -14.53], [28.5, -14.75], [27.97, -14.53], [27.75, -14.0], [27.85, -13.75], [27.82, -13.68], [27.47, -13.53]]]]}, "2022-02-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, -13.53], [27.25, -13.0], [27.47, -12.47], [28.0, -12.25], [28.53, -12.47], [28.68, -12.82], [29.03, -12.97], [29.25, -13.5], [29.15, -13.75], [29.25, -14.0], [29.03, -14.53], [28.5, -14.75], [27.97, -14.53], [27.75, -14.0], [27.85, -13.75], [27.82, -13.68], [27.47, -13.53]]]]}, "2022-02-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, -11.53], [23.25, -11.0], [23.47, -10.47], [24.0, -10.25], [24.25, -10.35], [24.5, -10.25], 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19.134119544307623, 19.307989729260328]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.94143769992519, 20.203509239579546, 17.85266201099472, 17.656239392023906, 17.794285575536776]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2766976933903986, -1.2015501668471416, -2.1728295126874047, -1.886202893478265, -1.6743720603529064]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.598353575023907, -1.2260146439347182, -2.869100506776533, -2.5099462089614804, -2.2006738721144643]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.39712007341059, -1.2652954909348562, -2.1719691718144354, -1.833182564195501, -1.6128342463896364]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7362525175095438, -1.329382639911706, -2.8681241367945045, -2.380631694965756, -2.0881553270849342]}}