{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:23:29.906438", "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-Oct-07_to_2022-Oct-11_19.5_22.0"}, "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": 2022100000359}, "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 07 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 11 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": 295095.99205500295}, "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": ["Chad", "Libya", "Niger"]}, "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": 22.0}, "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": 19.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "19.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[14.47, 24.03], [15.0, 24.25], [15.53, 24.03], [15.68, 23.68], [15.8, 23.63], [15.97, 24.03], [16.32, 24.18], [16.47, 24.53], [16.82, 24.68], [16.97, 25.03], [17.5, 25.25], [17.75, 25.15], [17.82, 25.18], [17.97, 25.53], [18.5, 25.75], [18.75, 25.65], [19.0, 25.75], [19.25, 25.65], [19.5, 25.75], [19.75, 25.65], [20.0, 25.75], [20.25, 25.65], [20.5, 25.75], [21.03, 25.53], [21.25, 25.0], [21.03, 24.47], [20.68, 24.32], [20.65, 24.25], [20.68, 24.18], [21.03, 24.03], [21.25, 23.5], [21.15, 23.25], [21.18, 23.18], [21.25, 23.15], [21.5, 23.25], [22.03, 23.03], [22.18, 22.68], [22.25, 22.65], [22.5, 22.75], [22.75, 22.65], [23.0, 22.75], [23.53, 22.53], [23.75, 22.0], [23.53, 21.47], [23.0, 21.25], [22.75, 21.35], [22.68, 21.32], [22.65, 21.25], [22.75, 21.0], [22.53, 20.47], [22.18, 20.32], [22.03, 19.97], [21.68, 19.82], [21.53, 19.47], [21.0, 19.25], [20.75, 19.35], [20.68, 19.32], [20.65, 19.25], [20.68, 19.18], [21.03, 19.03], [21.25, 18.5], [21.03, 17.97], [20.5, 17.75], [20.2, 17.88], [20.03, 17.47], [19.5, 17.25], [18.97, 17.47], [18.82, 17.82], [18.75, 17.85], [18.5, 17.75], [17.97, 17.97], [17.75, 18.5], [17.85, 18.75], [17.75, 19.0], [17.97, 19.53], [18.32, 19.68], [18.35, 19.75], [18.32, 19.82], [17.97, 19.97], [17.75, 20.5], [17.85, 20.75], [17.8, 20.88], [17.5, 20.75], [17.0, 20.96], [16.5, 20.75], [15.97, 20.97], [15.82, 21.32], [15.75, 21.35], [15.5, 21.25], [15.25, 21.35], [15.0, 21.25], [14.47, 21.47], [14.25, 22.0], [14.35, 22.25], [14.25, 22.5], [14.35, 22.75], [14.25, 23.0], [14.35, 23.25], [14.25, 23.5], [14.47, 24.03]], [[16.25, 22.65], [16.32, 22.68], [16.35, 22.75], [16.32, 22.82], [16.2, 22.88], [16.15, 22.75], [16.18, 22.68], [16.25, 22.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-10-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, 22.5], [14.35, 22.75], [14.25, 23.0], [14.47, 23.53], [15.0, 23.75], [15.53, 23.53], [15.75, 23.0], [15.65, 22.75], [15.68, 22.68], [15.75, 22.65], [16.0, 22.75], [16.53, 22.53], [16.68, 22.18], [17.0, 22.04], [17.5, 22.25], [17.93, 22.07], [17.82, 22.32], [17.47, 22.47], [17.25, 23.0], [17.47, 23.53], [17.82, 23.68], [17.97, 24.03], [18.32, 24.18], [18.47, 24.53], [19.0, 24.75], [19.25, 24.65], [19.5, 24.75], [19.75, 24.65], [20.0, 24.75], [20.53, 24.53], [20.75, 24.0], [20.65, 23.75], [20.75, 23.5], [20.57, 23.07], [21.0, 23.25], [21.25, 23.15], [21.5, 23.25], [22.03, 23.03], [22.18, 22.68], [22.25, 22.65], [22.5, 22.75], [22.75, 22.65], [23.0, 22.75], [23.53, 22.53], [23.75, 22.0], [23.53, 21.47], [23.0, 21.25], [22.75, 21.35], [22.5, 21.25], [22.25, 21.35], [22.0, 21.25], [21.7, 21.38], [21.53, 20.97], [21.0, 20.75], [20.5, 20.96], [20.18, 20.82], [20.03, 20.47], [19.68, 20.32], [19.53, 19.97], [19.0, 19.75], [18.75, 19.85], [18.5, 19.75], [17.97, 19.97], [17.75, 20.5], [17.85, 20.75], [17.8, 20.88], [17.5, 20.75], [17.0, 20.96], [16.5, 20.75], [15.97, 20.97], [15.82, 21.32], [15.75, 21.35], [15.5, 21.25], [15.25, 21.35], [15.0, 21.25], [14.47, 21.47], [14.25, 22.0], [14.35, 22.25], [14.25, 22.5]], [[20.25, 22.5], [20.15, 22.25], [20.18, 22.18], [20.43, 22.07], [20.25, 22.5]], [[20.43, 22.93], [20.18, 22.82], [20.15, 22.75], [20.25, 22.5], [20.43, 22.93]], [[18.35, 21.75], [18.32, 21.82], [18.07, 21.93], [18.2, 21.63], [18.32, 21.68], [18.35, 21.75]]]]}, "2022-10-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, 22.5], [14.35, 22.75], [14.25, 23.0], [14.35, 23.25], [14.25, 23.5], [14.47, 24.03], [15.0, 24.25], [15.53, 24.03], [15.68, 23.68], [15.8, 23.63], [15.97, 24.03], [16.32, 24.18], [16.47, 24.53], [16.82, 24.68], [16.97, 25.03], [17.5, 25.25], [17.75, 25.15], [17.82, 25.18], [17.97, 25.53], [18.5, 25.75], [18.75, 25.65], [19.0, 25.75], [19.25, 25.65], [19.5, 25.75], [19.75, 25.65], [20.0, 25.75], [20.25, 25.65], [20.5, 25.75], [21.03, 25.53], [21.25, 25.0], [21.03, 24.47], [20.68, 24.32], [20.65, 24.25], [20.68, 24.18], [21.03, 24.03], [21.25, 23.5], [21.15, 23.25], [21.18, 23.18], [21.25, 23.15], [21.5, 23.25], [22.03, 23.03], [22.18, 22.68], [22.25, 22.65], [22.5, 22.75], [22.75, 22.65], [23.0, 22.75], [23.53, 22.53], [23.75, 22.0], [23.53, 21.47], [23.0, 21.25], [22.75, 21.35], [22.68, 21.32], [22.65, 21.25], [22.75, 21.0], [22.53, 20.47], [22.18, 20.32], [22.03, 19.97], [21.68, 19.82], [21.53, 19.47], [21.0, 19.25], [20.75, 19.35], [20.68, 19.32], [20.65, 19.25], [20.68, 19.18], [21.03, 19.03], [21.25, 18.5], [21.03, 17.97], [20.5, 17.75], [20.2, 17.88], [20.03, 17.47], [19.5, 17.25], [18.97, 17.47], [18.82, 17.82], [18.75, 17.85], [18.5, 17.75], [17.97, 17.97], [17.75, 18.5], [17.85, 18.75], [17.75, 19.0], [17.97, 19.53], [18.32, 19.68], [18.35, 19.75], [18.32, 19.82], [17.97, 19.97], [17.75, 20.5], [17.85, 20.75], [17.8, 20.88], [17.5, 20.75], [17.0, 20.96], [16.5, 20.75], [15.97, 20.97], [15.82, 21.32], [15.75, 21.35], [15.5, 21.25], [15.25, 21.35], [15.0, 21.25], [14.47, 21.47], [14.25, 22.0], [14.35, 22.25], [14.25, 22.5]], [[16.25, 22.65], [16.32, 22.68], [16.35, 22.75], [16.32, 22.82], [16.2, 22.88], [16.15, 22.75], [16.18, 22.68], [16.25, 22.65]]]]}, "2022-10-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, 22.5], [14.35, 22.75], [14.25, 23.0], [14.35, 23.25], [14.25, 23.5], [14.47, 24.03], [15.0, 24.25], [15.53, 24.03], [15.68, 23.68], [15.8, 23.63], [15.97, 24.03], [16.32, 24.18], [16.47, 24.53], [16.82, 24.68], [16.97, 25.03], [17.5, 25.25], [17.75, 25.15], [17.82, 25.18], [17.97, 25.53], [18.5, 25.75], [18.75, 25.65], [19.0, 25.75], [19.25, 25.65], [19.5, 25.75], [19.75, 25.65], [20.0, 25.75], [20.25, 25.65], [20.5, 25.75], [21.03, 25.53], [21.25, 25.0], [21.03, 24.47], [20.68, 24.32], [20.65, 24.25], [20.68, 24.18], [21.03, 24.03], [21.25, 23.5], [21.15, 23.25], [21.18, 23.18], [21.25, 23.15], [21.5, 23.25], [22.03, 23.03], [22.18, 22.68], [22.25, 22.65], [22.5, 22.75], [22.75, 22.65], [23.0, 22.75], [23.53, 22.53], [23.75, 22.0], [23.53, 21.47], [23.0, 21.25], [22.75, 21.35], [22.68, 21.32], [22.65, 21.25], [22.75, 21.0], [22.53, 20.47], [22.18, 20.32], [22.03, 19.97], [21.68, 19.82], [21.53, 19.47], [21.0, 19.25], [20.75, 19.35], [20.68, 19.32], [20.65, 19.25], [20.68, 19.18], [21.03, 19.03], [21.25, 18.5], [21.03, 17.97], [20.5, 17.75], [20.2, 17.88], [20.03, 17.47], [19.5, 17.25], [18.97, 17.47], [18.82, 17.82], [18.75, 17.85], [18.5, 17.75], [17.97, 17.97], [17.75, 18.5], [17.85, 18.75], [17.75, 19.0], [17.97, 19.53], [18.32, 19.68], [18.35, 19.75], [18.32, 19.82], [17.97, 19.97], [17.75, 20.5], [17.85, 20.75], [17.8, 20.88], [17.5, 20.75], [17.0, 20.96], [16.5, 20.75], [15.97, 20.97], [15.82, 21.32], [15.75, 21.35], [15.5, 21.25], [15.25, 21.35], [15.0, 21.25], [14.47, 21.47], [14.25, 22.0], [14.35, 22.25], [14.25, 22.5]], [[16.25, 22.65], [16.32, 22.68], [16.35, 22.75], [16.32, 22.82], [16.2, 22.88], [16.15, 22.75], [16.18, 22.68], [16.25, 22.65]]]]}, "2022-10-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, 23.0], [14.35, 23.25], [14.25, 23.5], [14.47, 24.03], [15.0, 24.25], [15.53, 24.03], [15.68, 23.68], [15.8, 23.63], [15.97, 24.03], [16.32, 24.18], [16.47, 24.53], [16.82, 24.68], [16.97, 25.03], [17.5, 25.25], [17.75, 25.15], [17.82, 25.18], [17.97, 25.53], [18.5, 25.75], [18.75, 25.65], [19.0, 25.75], [19.25, 25.65], [19.5, 25.75], [19.75, 25.65], [20.0, 25.75], [20.25, 25.65], [20.5, 25.75], [21.03, 25.53], [21.25, 25.0], [21.03, 24.47], [20.68, 24.32], [20.65, 24.25], [20.68, 24.18], [21.03, 24.03], [21.25, 23.5], [21.15, 23.25], [21.2, 23.13], [21.5, 23.25], [22.03, 23.03], [22.18, 22.68], [22.53, 22.53], [22.75, 22.0], [22.65, 21.75], [22.75, 21.5], [22.65, 21.25], [22.75, 21.0], [22.53, 20.47], [22.18, 20.32], [22.03, 19.97], [21.68, 19.82], [21.53, 19.47], [21.0, 19.25], [20.75, 19.35], [20.68, 19.32], [20.65, 19.25], [20.68, 19.18], [21.03, 19.03], [21.25, 18.5], [21.03, 17.97], [20.5, 17.75], [20.2, 17.88], [20.03, 17.47], [19.5, 17.25], [18.97, 17.47], [18.82, 17.82], [18.75, 17.85], [18.5, 17.75], [17.97, 17.97], [17.75, 18.5], [17.85, 18.75], [17.75, 19.0], [17.97, 19.53], [18.32, 19.68], [18.35, 19.75], [18.32, 19.82], [17.97, 19.97], [17.75, 20.5], [17.97, 21.03], [18.32, 21.18], [18.35, 21.25], [18.3, 21.38], [18.0, 21.25], [17.75, 21.35], [17.5, 21.25], [17.25, 21.35], [17.0, 21.25], [16.75, 21.35], [16.5, 21.25], [16.25, 21.35], [16.0, 21.25], [15.75, 21.35], [15.5, 21.25], [14.97, 21.47], [14.82, 21.82], [14.47, 21.97], [14.25, 22.5], [14.35, 22.75], [14.25, 23.0]], [[16.2, 22.88], [16.15, 22.75], [16.18, 22.68], [16.25, 22.65], [16.32, 22.68], [16.35, 22.75], [16.32, 22.82], [16.2, 22.88]], [[17.75, 23.15], [17.82, 23.18], [17.88, 23.3], [17.75, 23.35], [17.68, 23.32], [17.65, 23.25], [17.68, 23.18], [17.75, 23.15]]]]}, "2022-10-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, 23.0], [18.97, 23.53], [19.5, 23.75], [20.03, 23.53], [20.18, 23.18], [20.53, 23.03], [20.75, 22.5], [20.65, 22.25], [20.68, 22.18], [21.03, 22.03], [21.25, 21.5], [21.03, 20.97], [20.68, 20.82], [20.53, 20.47], [20.0, 20.25], [19.47, 20.47], [19.25, 21.0], [19.35, 21.25], [19.32, 21.32], [18.97, 21.47], [18.75, 22.0], [18.96, 22.5], [18.75, 23.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.6530646334239805}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.555353317945306}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.601270815793328, 22.71747752111969, 22.369587011585338, 22.785832511197952, 21.67441853680174]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.842126249931255, 17.599096540559003, 17.607220307788964, 18.71379888139097, 20.6845337036886]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.219225902323198, -3.701898473803637, -3.842278809088543, -3.255525414659988, -2.937243709715444]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.916978423660396, -4.58154464552814, -4.6530646334239805, -4.0420443813339375, -3.132488911626183]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5245202194664564, -1.7278245667571865, -1.774435385996298, -1.4703483038832734, -1.265931921639367]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9395136306784686, -2.276436172074084, -2.175105599347448, -1.8005359248238328, -1.3075820560386304]}}