{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:53.364884", "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-Jan-13_to_2022-Jan-17_8.5_29.0"}, "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": 2022010000562}, "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 13 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 17 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": 51404.93557815643}, "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": ["Algeria", "Libya"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 29.0}, "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": 8.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "8.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 6.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 11.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.47, 28.47], [7.25, 29.0], [7.47, 29.53], [8.0, 29.75], [8.25, 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27.75], [7.25, 27.85], [7.0, 27.75], [6.47, 27.97], [6.25, 28.5], [6.47, 29.03], [6.82, 29.18], [6.97, 29.53], [7.5, 29.75]]]]}, "2022-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.5, 29.75], [7.75, 29.65], [8.0, 29.75], [8.25, 29.65], [8.32, 29.68], [8.47, 30.03], [9.0, 30.25], [9.25, 30.15], [9.5, 30.25], [9.75, 30.15], [10.0, 30.25], [10.25, 30.15], [10.5, 30.25], [11.03, 30.03], [11.18, 29.68], [11.53, 29.53], [11.75, 29.0], [11.53, 28.47], [11.0, 28.25], [10.75, 28.35], [10.68, 28.32], [10.53, 27.97], [10.0, 27.75], [9.75, 27.85], [9.5, 27.75], [9.25, 27.85], [9.0, 27.75], [8.75, 27.85], [8.5, 27.75], [8.25, 27.85], [8.0, 27.75], [7.75, 27.85], [7.5, 27.75], [7.25, 27.85], [7.0, 27.75], [6.47, 27.97], [6.25, 28.5], [6.47, 29.03], [6.82, 29.18], [6.97, 29.53], [7.5, 29.75]]]]}, "2022-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.5, 29.75], [7.75, 29.65], [8.0, 29.75], [8.25, 29.65], [8.32, 29.68], [8.47, 30.03], [9.0, 30.25], 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entire duration", "value": -5.5788835926384195}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.018316236473114}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.743217558178401, 6.192749964765312, 6.80664670870658, 6.345479671444878, 7.449066550092937]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.129407703928507, 5.367028797514365, 5.646407362188256, 5.289306941176562, 6.873016815917481]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7121826164866434, -4.3182036718876855, -3.726131054927054, -4.247272835800671, -3.7925065582982938]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": 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