{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:20.939814", "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-Aug-25_to_2022-Aug-29_12.5_16.0"}, "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": 2022080001081}, "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": "August 25 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 29 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": 71396.72708965161}, "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", "Niger"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 16.0}, "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": 12.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "12.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 10.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[11.75, 16.65], [11.82, 16.68], [11.97, 17.03], [12.5, 17.25], [13.03, 17.03], [13.18, 16.68], [13.5, 16.54], [14.0, 16.75], [14.25, 16.65], [14.5, 16.75], [15.03, 16.53], [15.25, 16.0], [15.15, 15.75], [15.25, 15.5], [15.03, 14.97], [14.5, 14.75], [14.25, 14.85], [14.18, 14.82], [14.15, 14.75], [14.25, 14.5], [14.03, 13.97], [13.5, 13.75], [12.97, 13.97], [12.75, 14.5], [12.85, 14.75], [12.82, 14.82], [12.75, 14.85], [12.68, 14.82], [12.53, 14.47], [12.0, 14.25], [11.75, 14.35], [11.5, 14.25], [10.97, 14.47], [10.82, 14.82], [10.75, 14.85], [10.5, 14.75], [9.97, 14.97], [9.75, 15.5], [9.96, 16.0], [9.82, 16.32], [9.47, 16.47], [9.25, 17.0], [9.47, 17.53], [10.0, 17.75], [10.25, 17.65], [10.5, 17.75], [11.03, 17.53], [11.25, 17.0], [11.15, 16.75], [11.18, 16.68], [11.25, 16.65], [11.5, 16.75], [11.75, 16.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-08-25T11:30:00.000000000": 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14.82], [14.15, 14.75], [14.25, 14.5], [14.03, 13.97], [13.5, 13.75], [12.97, 13.97], [12.75, 14.5], [12.85, 14.75], [12.82, 14.82], [12.75, 14.85], [12.68, 14.82], [12.53, 14.47], [12.0, 14.25], [11.75, 14.35], [11.5, 14.25], [10.97, 14.47], [10.82, 14.82], [10.75, 14.85], [10.5, 14.75], [9.97, 14.97], [9.75, 15.5], [9.97, 16.03], [10.32, 16.18], [10.47, 16.53]]]]}, "2022-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.47, 16.47], [9.25, 17.0], [9.47, 17.53], [10.0, 17.75], [10.25, 17.65], [10.5, 17.75], [11.03, 17.53], [11.25, 17.0], [11.15, 16.75], [11.18, 16.68], [11.25, 16.65], [11.5, 16.75], [11.75, 16.65], [11.82, 16.68], [11.97, 17.03], [12.5, 17.25], [13.03, 17.03], [13.18, 16.68], [13.5, 16.54], [14.0, 16.75], [14.25, 16.65], [14.5, 16.75], [15.03, 16.53], [15.25, 16.0], [15.15, 15.75], [15.25, 15.5], [15.03, 14.97], [14.5, 14.75], [14.25, 14.85], [14.18, 14.82], [14.15, 14.75], [14.25, 14.5], [14.03, 13.97], [13.5, 13.75], [12.97, 13.97], [12.75, 14.5], [12.85, 14.75], [12.82, 14.82], [12.75, 14.85], [12.68, 14.82], [12.53, 14.47], [12.0, 14.25], [11.75, 14.35], [11.5, 14.25], [10.97, 14.47], [10.82, 14.82], [10.75, 14.85], [10.5, 14.75], [9.97, 14.97], [9.75, 15.5], [9.96, 16.0], [9.82, 16.32], [9.47, 16.47]]]]}, "2022-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.47, 16.47], [9.25, 17.0], [9.47, 17.53], [10.0, 17.75], [10.25, 17.65], [10.5, 17.75], [11.03, 17.53], [11.25, 17.0], [11.15, 16.75], [11.18, 16.68], [11.25, 16.65], [11.5, 16.75], [11.75, 16.65], [11.82, 16.68], [11.97, 17.03], [12.5, 17.25], [13.03, 17.03], [13.18, 16.68], [13.5, 16.54], [14.0, 16.75], [14.25, 16.65], [14.5, 16.75], [15.03, 16.53], [15.25, 16.0], [15.15, 15.75], [15.25, 15.5], [15.03, 14.97], [14.5, 14.75], [14.25, 14.85], [14.18, 14.82], [14.15, 14.75], [14.25, 14.5], [14.03, 13.97], [13.5, 13.75], [12.97, 13.97], [12.75, 14.5], [12.85, 14.75], [12.82, 14.82], [12.75, 14.85], [12.68, 14.82], [12.53, 14.47], [12.0, 14.25], [11.75, 14.35], [11.5, 14.25], [10.97, 14.47], [10.82, 14.82], [10.75, 14.85], [10.5, 14.75], [9.97, 14.97], [9.75, 15.5], [9.96, 16.0], [9.82, 16.32], [9.47, 16.47]]]]}, "2022-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.47, 16.47], [9.25, 17.0], [9.47, 17.53], [10.0, 17.75], [10.25, 17.65], [10.5, 17.75], [11.03, 17.53], [11.25, 17.0], [11.15, 16.75], [11.25, 16.5], [11.03, 15.97], [10.5, 15.75], [9.97, 15.97], [9.82, 16.32], [9.47, 16.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.089945732766978}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.5559222402761943}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.939998761007416, 27.704811178208956, 26.599794989490988, 26.956247801194536, 29.385718050978596]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.20572685516578, 26.968140344528194, 25.266884019763324, 26.28351386043198, 29.211020450395097]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9221583675056615, -3.076770913066639, -4.23467587232862, -3.8366054085908416, -1.9807972431454648]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.229866273985067, -3.7958579029578914, -5.089945732766978, -4.829457998861869, -2.049674987662627]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.574378209059538, -1.7163838029831304, -2.4742005469623725, -2.3268939057192477, -1.453977668282933]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.778753025336448, -2.1632996439928105, -3.0384993691360984, -3.523817169425549, -1.5458171594046228]}}