{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:11.984443", "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": "2012-Aug-30_to_2012-Sep-02_4.5_21.5"}, "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": 2012080001304}, "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 30 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 02 2012"}, "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": 54254.89037850814}, "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": 21.5}, "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": 4.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "4.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 3.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 6.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.97, 23.53], [3.5, 23.75], [3.75, 23.65], [3.88, 23.7], [3.75, 24.0], [3.97, 24.53], [4.5, 24.75], [4.75, 24.65], [5.0, 24.75], [5.53, 24.53], [5.75, 24.0], [5.65, 23.75], [5.75, 23.5], [5.65, 23.25], [5.75, 23.0], [5.65, 22.75], [5.68, 22.68], [6.03, 22.53], [6.18, 22.18], [6.53, 22.03], [6.75, 21.5], [6.53, 20.97], [6.0, 20.75], [5.75, 20.85], [5.5, 20.75], [5.25, 20.85], [5.0, 20.75], [4.75, 20.85], [4.5, 20.75], [3.97, 20.97], [3.82, 21.32], [3.47, 21.47], [3.32, 21.82], [2.97, 21.97], [2.75, 22.5], [2.85, 22.75], [2.75, 23.0], [2.97, 23.53]]]]}, "2012-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.97, 23.53], [3.5, 23.75], [3.75, 23.65], [3.88, 23.7], [3.75, 24.0], [3.97, 24.53], [4.5, 24.75], [4.75, 24.65], [5.0, 24.75], [5.53, 24.53], [5.75, 24.0], [5.65, 23.75], [5.75, 23.5], [5.65, 23.25], [5.75, 23.0], [5.65, 22.75], [5.68, 22.68], [6.03, 22.53], [6.18, 22.18], [6.53, 22.03], [6.75, 21.5], [6.53, 20.97], [6.0, 20.75], [5.75, 20.85], [5.5, 20.75], [5.25, 20.85], [5.0, 20.75], [4.75, 20.85], [4.5, 20.75], [3.97, 20.97], [3.82, 21.32], [3.47, 21.47], [3.32, 21.82], [2.97, 21.97], [2.75, 22.5], [2.85, 22.75], [2.75, 23.0], [2.97, 23.53]]]]}, "2012-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.97, 23.53], [3.5, 23.75], [3.75, 23.65], [3.88, 23.7], [3.75, 24.0], [3.97, 24.53], [4.5, 24.75], [4.75, 24.65], [5.0, 24.75], [5.53, 24.53], [5.75, 24.0], [5.65, 23.75], [5.75, 23.5], [5.65, 23.25], [5.75, 23.0], [5.65, 22.75], [5.68, 22.68], [6.03, 22.53], [6.18, 22.18], [6.53, 22.03], [6.75, 21.5], [6.53, 20.97], [6.0, 20.75], [5.75, 20.85], [5.5, 20.75], [5.25, 20.85], [5.0, 20.75], [4.75, 20.85], [4.5, 20.75], [3.97, 20.97], [3.82, 21.32], [3.47, 21.47], [3.32, 21.82], [2.97, 21.97], [2.75, 22.5], [2.85, 22.75], [2.75, 23.0], [2.97, 23.53]]]]}, "2012-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.5, 23.75], [4.03, 23.53], [4.25, 23.0], [4.03, 22.47], [3.5, 22.25], [2.97, 22.47], [2.75, 23.0], [2.97, 23.53], [3.5, 23.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.2474821941964365}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0275670794871368}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [31.02480843351117, 30.813496632694125, 30.71799857581408, 32.63168634844243]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.320229207904617, 29.03685125365388, 29.08449122064053, 32.63168634844243]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8960675169853731, -2.078188268729772, -2.1387504739641043, -1.4517716763481872]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.274985095897023, -3.2474821941964365, -2.8431519161111964, -1.4517716763481872]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5290281256383733, -1.6598348354164993, -1.7051303019225486, -1.228110997121408]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.760064458740651, -2.7857305567388773, -2.2840781029809185, -1.228110997121408]}}