{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:36:27.043561", "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": "2023-Sep-09_to_2023-Sep-17_21.0_31.0"}, "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": 2023090000255}, "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": "September 09 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 17 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 254038.58420735382}, "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": ["Libya"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "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": ["Mediterranean Sea - Eastern Basin"]}, "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": 31.0}, "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": 21.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 14.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.47, 30.53], [16.0, 30.75], [16.53, 30.53], [16.75, 30.0], [16.65, 29.75], [16.75, 29.5], [16.53, 28.97], [16.0, 28.75], [15.47, 28.97], [15.25, 29.5], [15.35, 29.75], [15.25, 30.0], [15.47, 30.53]]]]}, "2023-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.0, 30.75], [16.53, 30.53], [16.68, 30.18], [17.03, 30.03], [17.25, 29.5], [17.03, 28.97], [16.5, 28.75], [16.25, 28.85], [16.0, 28.75], [15.47, 28.97], [15.25, 29.5], [15.35, 29.75], [15.25, 30.0], [15.47, 30.53], [16.0, 30.75]]], [[[19.75, 31.5], [19.85, 31.75], [19.75, 32.0], [19.85, 32.25], [19.75, 32.5], [19.97, 33.03], [20.5, 33.25], [21.03, 33.03], [21.18, 32.68], [21.53, 32.53], [21.75, 32.0], [21.65, 31.75], [21.75, 31.5], [21.65, 31.25], [21.68, 31.18], [22.03, 31.03], [22.25, 30.5], [22.03, 29.97], [21.5, 29.75], [21.0, 29.96], [20.5, 29.75], [19.97, 29.97], [19.75, 30.5], [19.85, 30.75], [19.75, 31.0], [19.85, 31.25], [19.75, 31.5]]]]}, "2023-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.5, 31.25], [15.75, 31.15], [16.0, 31.25], [16.25, 31.15], [16.5, 31.25], [17.03, 31.03], [17.25, 30.5], [17.04, 30.0], [17.25, 29.5], [17.03, 28.97], [16.5, 28.75], [16.25, 28.85], [16.0, 28.75], [15.47, 28.97], [15.32, 29.32], [14.97, 29.47], [14.75, 30.0], [14.85, 30.25], [14.75, 30.5], [14.97, 31.03], [15.5, 31.25]]], [[[19.75, 31.5], [19.85, 31.75], [19.75, 32.0], [19.85, 32.25], [19.75, 32.5], [19.97, 33.03], [20.5, 33.25], [21.03, 33.03], [21.18, 32.68], [21.25, 32.65], [21.32, 32.68], [21.47, 33.03], [22.0, 33.25], [22.25, 33.15], [22.5, 33.25], [23.03, 33.03], [23.18, 32.68], [23.53, 32.53], [23.75, 32.0], [23.53, 31.47], [23.18, 31.32], [23.03, 30.97], [22.68, 30.82], [22.65, 30.75], [22.75, 30.5], [22.53, 29.97], [22.18, 29.82], [22.03, 29.47], [21.5, 29.25], [21.25, 29.35], [21.0, 29.25], [20.47, 29.47], [20.32, 29.82], [19.97, 29.97], [19.75, 30.5], [19.85, 30.75], [19.75, 31.0], [19.85, 31.25], [19.75, 31.5]]]]}, "2023-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.47, 32.53], [19.82, 32.68], [19.97, 33.03], [20.5, 33.25], [21.03, 33.03], [21.18, 32.68], [21.25, 32.65], [21.32, 32.68], [21.47, 33.03], [22.0, 33.25], [22.25, 33.15], [22.5, 33.25], [23.03, 33.03], [23.18, 32.68], [23.53, 32.53], [23.75, 32.0], [23.53, 31.47], [23.18, 31.32], [23.03, 30.97], [22.68, 30.82], [22.65, 30.75], [22.75, 30.5], [22.53, 29.97], [22.18, 29.82], [22.03, 29.47], [21.5, 29.25], [21.25, 29.35], [21.0, 29.25], [20.47, 29.47], [20.32, 29.82], [19.97, 29.97], [19.82, 30.32], [19.47, 30.47], [19.25, 31.0], [19.35, 31.25], [19.25, 31.5], [19.35, 31.75], [19.25, 32.0], [19.47, 32.53]]], [[[14.82, 33.68], [14.85, 33.75], [14.75, 34.0], [14.97, 34.53], [15.32, 34.68], [15.47, 35.03], [16.0, 35.25], [16.25, 35.15], [16.5, 35.25], [17.03, 35.03], [17.18, 34.68], [17.53, 34.53], [17.68, 34.18], [17.75, 34.15], [18.0, 34.25], [18.53, 34.03], [18.68, 33.68], [19.03, 33.53], [19.25, 33.0], [19.15, 32.75], [19.25, 32.5], [19.15, 32.25], [19.25, 32.0], [19.15, 31.75], [19.25, 31.5], [19.03, 30.97], [18.5, 30.75], [18.25, 30.85], [18.0, 30.75], [17.75, 30.85], [17.68, 30.82], [17.65, 30.75], [17.68, 30.68], [18.03, 30.53], [18.25, 30.0], [18.03, 29.47], [17.5, 29.25], [17.25, 29.35], [17.18, 29.32], [17.03, 28.97], [16.5, 28.75], [16.25, 28.85], [16.0, 28.75], [15.47, 28.97], [15.32, 29.32], [14.97, 29.47], [14.75, 30.0], [14.85, 30.25], [14.75, 30.5], [14.97, 31.03], [15.5, 31.25], [15.75, 31.15], [15.82, 31.18], [15.88, 31.3], [15.47, 31.47], [15.32, 31.82], [15.25, 31.85], [15.0, 31.75], [14.47, 31.97], [14.25, 32.5], [14.35, 32.75], [14.25, 33.0], [14.47, 33.53], [14.82, 33.68]]]]}, "2023-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.47, 33.53], [14.82, 33.68], [14.85, 33.75], [14.75, 34.0], [14.97, 34.53], [15.32, 34.68], [15.47, 35.03], [16.0, 35.25], [16.25, 35.15], [16.5, 35.25], [16.75, 35.15], [17.0, 35.25], [17.25, 35.15], [17.5, 35.25], [17.75, 35.15], [18.0, 35.25], [18.53, 35.03], [18.68, 34.68], [19.03, 34.53], [19.18, 34.18], [19.53, 34.03], [19.75, 33.5], [19.65, 33.25], [19.75, 33.0], [19.65, 32.75], [19.7, 32.63], [19.82, 32.68], [19.97, 33.03], [20.5, 33.25], [21.03, 33.03], [21.18, 32.68], [21.25, 32.65], [21.32, 32.68], [21.47, 33.03], [22.0, 33.25], [22.25, 33.15], [22.5, 33.25], [23.03, 33.03], [23.18, 32.68], [23.53, 32.53], [23.75, 32.0], [23.53, 31.47], [23.18, 31.32], [23.03, 30.97], [22.68, 30.82], [22.65, 30.75], [22.75, 30.5], [22.53, 29.97], [22.18, 29.82], [22.03, 29.47], [21.5, 29.25], [21.25, 29.35], [21.0, 29.25], [20.47, 29.47], [20.32, 29.82], [19.97, 29.97], [19.82, 30.32], [19.5, 30.46], [19.0, 30.25], [18.75, 30.35], [18.5, 30.25], [18.25, 30.35], [18.18, 30.32], [18.15, 30.25], [18.25, 30.0], [18.03, 29.47], [17.5, 29.25], [17.25, 29.35], [17.0, 29.25], [16.47, 29.47], [16.32, 29.82], [16.25, 29.85], [16.18, 29.82], [16.03, 29.47], [15.5, 29.25], [14.97, 29.47], [14.75, 30.0], [14.85, 30.25], [14.75, 30.5], [14.97, 31.03], [15.38, 31.2], [15.25, 31.5], [15.35, 31.75], [15.32, 31.82], [15.25, 31.85], [15.0, 31.75], [14.47, 31.97], [14.25, 32.5], [14.35, 32.75], [14.25, 33.0], [14.47, 33.53]]]]}, "2023-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.47, 33.53], [14.82, 33.68], [14.85, 33.75], [14.75, 34.0], [14.97, 34.53], [15.32, 34.68], [15.47, 35.03], [16.0, 35.25], [16.25, 35.15], [16.5, 35.25], [16.75, 35.15], [17.0, 35.25], [17.25, 35.15], [17.5, 35.25], [17.75, 35.15], [18.0, 35.25], [18.53, 35.03], [18.68, 34.68], [19.03, 34.53], [19.18, 34.18], [19.53, 34.03], [19.75, 33.5], [19.65, 33.25], [19.68, 33.18], [20.0, 33.04], [20.5, 33.25], [21.03, 33.03], [21.18, 32.68], [21.25, 32.65], [21.5, 32.75], [21.75, 32.65], [22.0, 32.75], [22.25, 32.65], [22.5, 32.75], [22.75, 32.65], [23.0, 32.75], [23.53, 32.53], [23.75, 32.0], [23.53, 31.47], [23.18, 31.32], [23.03, 30.97], [22.68, 30.82], [22.65, 30.75], [22.75, 30.5], [22.53, 29.97], [22.18, 29.82], [22.03, 29.47], [21.5, 29.25], [21.25, 29.35], [21.0, 29.25], [20.47, 29.47], [20.32, 29.82], [19.97, 29.97], [19.82, 30.32], [19.5, 30.46], [19.0, 30.25], [18.75, 30.35], [18.5, 30.25], [18.25, 30.35], [18.18, 30.32], [18.15, 30.25], [18.25, 30.0], [18.03, 29.47], [17.5, 29.25], [17.25, 29.35], [17.0, 29.25], [16.47, 29.47], [16.25, 30.0], [16.35, 30.25], [16.32, 30.32], [15.97, 30.47], [15.82, 30.82], [15.47, 30.97], [15.25, 31.5], [15.35, 31.75], [15.32, 31.82], [15.25, 31.85], [15.0, 31.75], [14.47, 31.97], [14.25, 32.5], [14.35, 32.75], [14.25, 33.0], [14.47, 33.53]]]]}, "2023-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.85, 33.25], [14.75, 33.5], [14.85, 33.75], [14.75, 34.0], [14.97, 34.53], [15.32, 34.68], [15.47, 35.03], [16.0, 35.25], [16.25, 35.15], [16.5, 35.25], [16.75, 35.15], [17.0, 35.25], [17.25, 35.15], [17.5, 35.25], [17.75, 35.15], [18.0, 35.25], [18.53, 35.03], [18.68, 34.68], [19.03, 34.53], [19.18, 34.18], [19.53, 34.03], [19.75, 33.5], [19.65, 33.25], [19.68, 33.18], [20.0, 33.04], [20.5, 33.25], [21.03, 33.03], [21.2, 32.63], [21.5, 32.75], [21.75, 32.65], [22.0, 32.75], [22.25, 32.65], [22.5, 32.75], [22.75, 32.65], [23.0, 32.75], [23.53, 32.53], [23.75, 32.0], [23.53, 31.47], [23.0, 31.25], [22.75, 31.35], [22.68, 31.32], [22.65, 31.25], [22.75, 31.0], [22.65, 30.75], [22.75, 30.5], [22.53, 29.97], [22.18, 29.82], [22.03, 29.47], [21.5, 29.25], [21.25, 29.35], [21.0, 29.25], [20.47, 29.47], [20.25, 30.0], [20.35, 30.25], [20.32, 30.32], [19.97, 30.47], [19.82, 30.82], [19.7, 30.88], [19.53, 30.47], [19.0, 30.25], [18.75, 30.35], [18.5, 30.25], [18.25, 30.35], [18.18, 30.32], [18.15, 30.25], [18.25, 30.0], [18.03, 29.47], [17.5, 29.25], [17.25, 29.35], [17.0, 29.25], [16.47, 29.47], [16.25, 30.0], [16.35, 30.25], [16.25, 30.5], [16.38, 30.8], [16.25, 30.85], [16.0, 30.75], [15.47, 30.97], [15.25, 31.5], [15.35, 31.75], [15.32, 31.82], [14.97, 31.97], [14.75, 32.5], [14.85, 32.75], [14.75, 33.0], [14.85, 33.25]]]]}, "2023-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.35, 33.75], [16.25, 34.0], [16.47, 34.53], [17.0, 34.75], [17.53, 34.53], [17.68, 34.18], [17.75, 34.15], [18.0, 34.25], [18.25, 34.15], [18.5, 34.25], [19.03, 34.03], [19.18, 33.68], [19.53, 33.53], [19.68, 33.18], [20.0, 33.04], [20.5, 33.25], [21.03, 33.03], [21.25, 32.5], [21.13, 32.2], [21.25, 32.15], [21.32, 32.18], [21.47, 32.53], [22.0, 32.75], [22.53, 32.53], [22.75, 32.0], [22.65, 31.75], [22.75, 31.5], [22.53, 30.97], [22.18, 30.82], [22.15, 30.75], [22.25, 30.5], [22.03, 29.97], [21.5, 29.75], [21.25, 29.85], [21.0, 29.75], [20.47, 29.97], [20.32, 30.32], [19.97, 30.47], [19.82, 30.82], [19.5, 30.96], [19.18, 30.82], [19.03, 30.47], [18.5, 30.25], [18.07, 30.43], [18.25, 30.0], [18.03, 29.47], [17.5, 29.25], [16.97, 29.47], [16.75, 30.0], [16.97, 30.53], [17.5, 30.75], [16.97, 30.97], [16.75, 31.5], [16.85, 31.75], [16.75, 32.0], [16.85, 32.25], [16.82, 32.32], [16.47, 32.47], [16.25, 33.0], [16.35, 33.25], [16.25, 33.5], [16.35, 33.75]], [[17.93, 30.57], [17.82, 30.82], [17.75, 30.85], [17.5, 30.75], [17.93, 30.57]]]]}, "2023-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.47, 30.47], [20.25, 31.0], [20.47, 31.53], [21.0, 31.75], [21.25, 31.65], [21.5, 31.75], [22.03, 31.53], [22.25, 31.0], [22.03, 30.47], [21.5, 30.25], [21.25, 30.35], [21.0, 30.25], [20.47, 30.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.75041508171779}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.4015869861213828}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.35570663905628, 24.537669282717957, 24.262038578770216, 24.294027469101252, 24.02830182365284, 24.000387213246427, 24.15560926822309, 24.150295882353817, 24.569543179091454]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.153457629427805, 22.216843075411987, 20.98486941270079, 20.636960050351092, 20.327324003123124, 21.926836475209768, 22.216268154369345, 22.98181658837808, 24.518498403666456]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.5864352997787137, -3.0577164652974225, -3.1824253099112303, -2.437251790232705, -2.44136927098582, -2.3506792316913514, -2.077609936292088, -2.0939503283389027, -2.844297931252214]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6405685839491184, -3.7906639802908444, -4.1192358825879865, -4.852391785932582, -5.4027338825457605, -5.75041508171779, -5.33301452167791, -4.066450104484602, -2.9640972611604184]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4238494363340657, -1.421383716138639, -1.5030786323453293, -1.612686871960329, -1.8318479950593403, -1.800235559259094, -1.607762668876455, -1.555484068399883, -1.283708660876115]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4564519702696612, -1.8816371203215774, -1.959065606463008, -2.241986816747107, -2.574644876587116, -2.766221280237197, -2.5264950630524052, -1.9777567697949503, -1.3313775574955031]}}