{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:04.907447", "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": "2019-Feb-04_to_2019-Feb-07_8.0_27.5"}, "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": 2019020000177}, "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 04 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 07 2019"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 55079.422806695584}, "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"]}, "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": 27.5}, "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": 8.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "8.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 6.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 9.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 25.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 28.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-02-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.97, 28.53], [6.5, 28.75], [6.75, 28.65], [7.0, 28.75], [7.25, 28.65], [7.5, 28.75], [8.03, 28.53], [8.18, 28.18], [8.25, 28.15], [8.5, 28.25], [9.03, 28.03], [9.18, 27.68], [9.25, 27.65], [9.5, 27.75], [10.03, 27.53], [10.25, 27.0], [10.15, 26.75], [10.25, 26.5], [10.03, 25.97], [9.68, 25.82], [9.65, 25.75], [9.75, 25.5], [9.53, 24.97], [9.0, 24.75], [8.47, 24.97], [8.32, 25.32], [7.97, 25.47], [7.82, 25.82], [7.47, 25.97], [7.32, 26.32], [6.97, 26.47], [6.82, 26.82], [6.75, 26.85], [6.5, 26.75], [5.97, 26.97], [5.75, 27.5], [5.85, 27.75], [5.75, 28.0], [5.97, 28.53]]]]}, "2019-02-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.97, 28.53], [6.5, 28.75], [6.75, 28.65], [7.0, 28.75], [7.25, 28.65], [7.5, 28.75], [8.03, 28.53], [8.18, 28.18], [8.25, 28.15], [8.5, 28.25], [9.03, 28.03], [9.18, 27.68], [9.25, 27.65], [9.5, 27.75], [10.03, 27.53], [10.25, 27.0], [10.15, 26.75], [10.25, 26.5], [10.03, 25.97], [9.68, 25.82], [9.65, 25.75], [9.75, 25.5], [9.53, 24.97], [9.0, 24.75], [8.47, 24.97], [8.32, 25.32], [7.97, 25.47], [7.82, 25.82], [7.47, 25.97], [7.32, 26.32], [6.97, 26.47], [6.82, 26.82], [6.75, 26.85], [6.5, 26.75], [5.97, 26.97], [5.75, 27.5], [5.85, 27.75], [5.75, 28.0], [5.97, 28.53]]]]}, "2019-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.97, 28.53], [6.5, 28.75], [6.75, 28.65], [7.0, 28.75], [7.25, 28.65], [7.5, 28.75], [8.03, 28.53], [8.18, 28.18], [8.25, 28.15], [8.5, 28.25], [9.03, 28.03], [9.18, 27.68], [9.25, 27.65], [9.5, 27.75], [10.03, 27.53], [10.25, 27.0], [10.15, 26.75], [10.25, 26.5], [10.03, 25.97], [9.68, 25.82], [9.65, 25.75], [9.75, 25.5], [9.53, 24.97], [9.0, 24.75], [8.47, 24.97], [8.32, 25.32], [7.97, 25.47], [7.82, 25.82], [7.47, 25.97], [7.32, 26.32], [6.97, 26.47], [6.82, 26.82], [6.75, 26.85], [6.5, 26.75], [5.97, 26.97], [5.75, 27.5], [5.85, 27.75], [5.75, 28.0], [5.97, 28.53]]]]}, "2019-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[6.97, 26.97], [6.75, 27.5], [6.97, 28.03], [7.5, 28.25], [7.75, 28.15], [8.0, 28.25], [8.53, 28.03], [8.75, 27.5], [8.53, 26.97], [8.0, 26.75], [7.75, 26.85], [7.5, 26.75], [6.97, 26.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.0347868556641515}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.225256690288596}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.558356894831945, 7.884557930985238, 8.766324860928194, 8.938057998856664]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.083305316269104, 6.003485141711678, 7.580726612040451, 8.774598192889641]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.728540539119427, -5.476745671351222, -4.602717982029901, -3.902915473940965]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.897961303249758, -7.0347868556641515, -5.386090522218524, -3.9563538126759]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.543598329890163, -1.5165555933904171, -1.335744071910615, -1.245905880575121]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6932632729452817, -1.7606178833954014, -1.472591147200909, -1.2578472592385646]}}