{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:36:27.986457", "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-19_to_2023-Sep-27_17.5_78.5"}, "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": 2023090000398}, "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 19 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 27 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": 50529.736895847884}, "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": ["Norway"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arctic-Ocean"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": ["Barentsz Sea", "Greenland Sea"]}, "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": 78.5}, "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": 17.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 11.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 24.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 76.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 79.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.5, 79.75], [18.03, 79.53], [18.25, 79.0], [18.03, 78.47], [17.5, 78.25], [16.97, 78.47], [16.75, 79.0], [16.97, 79.53], [17.5, 79.75]]]]}, "2023-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.5, 79.75], [17.75, 79.65], [18.0, 79.75], [18.53, 79.53], [18.75, 79.0], [18.65, 78.75], [18.75, 78.5], [18.53, 77.97], [18.0, 77.75], [17.75, 77.85], [17.5, 77.75], [17.25, 77.85], [17.0, 77.75], [16.47, 77.97], [16.25, 78.5], [16.47, 79.03], [16.82, 79.18], [16.97, 79.53], [17.5, 79.75]]]]}, "2023-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.5, 79.75], [17.75, 79.65], [18.0, 79.75], [18.53, 79.53], [18.75, 79.0], [18.65, 78.75], [18.75, 78.5], [18.53, 77.97], [18.0, 77.75], [17.75, 77.85], [17.5, 77.75], [17.25, 77.85], [17.0, 77.75], [16.47, 77.97], [16.25, 78.5], [16.47, 79.03], [16.82, 79.18], [16.97, 79.53], [17.5, 79.75]]]]}, "2023-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.75, 79.65], [18.0, 79.75], [18.53, 79.53], [18.75, 79.0], [18.65, 78.75], [18.75, 78.5], [18.53, 77.97], [18.0, 77.75], [17.75, 77.85], [17.5, 77.75], [17.25, 77.85], [17.0, 77.75], [16.47, 77.97], [16.25, 78.5], [16.47, 79.03], [16.82, 79.18], [16.97, 79.53], [17.5, 79.75], [17.75, 79.65]]], [[[11.25, 79.0], [11.47, 79.53], [12.0, 79.75], [12.25, 79.65], [12.5, 79.75], [12.75, 79.65], [13.0, 79.75], [13.53, 79.53], [13.75, 79.0], [13.53, 78.47], [13.0, 78.25], [12.75, 78.35], [12.5, 78.25], [12.25, 78.35], [12.0, 78.25], [11.47, 78.47], [11.25, 79.0]]]]}, "2023-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.47, 78.47], [11.25, 79.0], [11.47, 79.53], [12.0, 79.75], [12.25, 79.65], [12.5, 79.75], [12.75, 79.65], [13.0, 79.75], [13.25, 79.65], [13.5, 79.75], [13.75, 79.65], [14.0, 79.75], [14.25, 79.65], [14.5, 79.75], [14.75, 79.65], [15.0, 79.75], [15.25, 79.65], [15.5, 79.75], [15.75, 79.65], [16.0, 79.75], [16.5, 79.54], [17.0, 79.75], [17.25, 79.65], [17.5, 79.75], [17.75, 79.65], [18.0, 79.75], [18.53, 79.53], [18.75, 79.0], [18.53, 78.47], [18.18, 78.32], [18.03, 77.97], [17.5, 77.75], [17.25, 77.85], [17.0, 77.75], [16.75, 77.85], [16.5, 77.75], [16.25, 77.85], [16.0, 77.75], [15.75, 77.85], [15.5, 77.75], [14.97, 77.97], [14.82, 78.32], [14.75, 78.35], [14.5, 78.25], [14.25, 78.35], [14.18, 78.32], [14.03, 77.97], [13.5, 77.75], [12.97, 77.97], [12.82, 78.32], [12.75, 78.35], [12.5, 78.25], [12.25, 78.35], [12.0, 78.25], [11.47, 78.47]]]]}, "2023-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, 79.0], [11.47, 79.53], [12.0, 79.75], [12.25, 79.65], [12.5, 79.75], [12.75, 79.65], [13.0, 79.75], [13.25, 79.65], [13.5, 79.75], [13.75, 79.65], [14.0, 79.75], [14.25, 79.65], [14.5, 79.75], [14.75, 79.65], [15.0, 79.75], [15.25, 79.65], [15.5, 79.75], [15.75, 79.65], [16.0, 79.75], [16.5, 79.54], [17.0, 79.75], [17.25, 79.65], [17.5, 79.75], [17.75, 79.65], [18.0, 79.75], [18.25, 79.65], [18.5, 79.75], [18.75, 79.65], [19.0, 79.75], [19.25, 79.65], [19.5, 79.75], [19.75, 79.65], [20.0, 79.75], [20.25, 79.65], [20.5, 79.75], [21.03, 79.53], [21.25, 79.0], [21.03, 78.47], [20.5, 78.25], [20.25, 78.35], [20.18, 78.32], [20.03, 77.97], [19.68, 77.82], [19.53, 77.47], [19.18, 77.32], [19.03, 76.97], [18.5, 76.75], [18.25, 76.85], [18.18, 76.82], [18.03, 76.47], [17.5, 76.25], [17.25, 76.35], [17.0, 76.25], [16.75, 76.35], [16.5, 76.25], [16.25, 76.35], [16.0, 76.25], [15.75, 76.35], [15.5, 76.25], [14.97, 76.47], [14.75, 77.0], [14.85, 77.25], [14.75, 77.5], [14.96, 78.0], [14.82, 78.32], [14.75, 78.35], [14.5, 78.25], [14.25, 78.35], [14.18, 78.32], [14.03, 77.97], [13.5, 77.75], [12.97, 77.97], [12.82, 78.32], [12.75, 78.35], [12.5, 78.25], [12.25, 78.35], [12.0, 78.25], [11.47, 78.47], [11.25, 79.0]]], [[[21.75, 78.0], [21.97, 78.53], [22.5, 78.75], [22.75, 78.65], [23.0, 78.75], [23.53, 78.53], [23.75, 78.0], [23.53, 77.47], [23.0, 77.25], [22.75, 77.35], [22.5, 77.25], [21.97, 77.47], [21.75, 78.0]]]]}, "2023-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.75, 79.0], [10.97, 79.53], [11.5, 79.75], [11.75, 79.65], [12.0, 79.75], [12.25, 79.65], [12.5, 79.75], [12.75, 79.65], [13.0, 79.75], [13.25, 79.65], [13.5, 79.75], [13.75, 79.65], [14.0, 79.75], [14.25, 79.65], [14.5, 79.75], [14.75, 79.65], [15.0, 79.75], [15.25, 79.65], [15.5, 79.75], [15.75, 79.65], [16.0, 79.75], [16.5, 79.54], [17.0, 79.75], [17.25, 79.65], [17.5, 79.75], [17.75, 79.65], [18.0, 79.75], [18.25, 79.65], [18.5, 79.75], [18.75, 79.65], [19.0, 79.75], [19.25, 79.65], [19.5, 79.75], [19.75, 79.65], [20.0, 79.75], [20.25, 79.65], [20.5, 79.75], [21.03, 79.53], [21.25, 79.0], [21.13, 78.7], [21.25, 78.65], [21.5, 78.75], [21.75, 78.65], [22.0, 78.75], [22.25, 78.65], [22.5, 78.75], [22.75, 78.65], [23.0, 78.75], [23.53, 78.53], [23.68, 78.18], [23.75, 78.15], [24.0, 78.25], [24.25, 78.15], [24.5, 78.25], [25.03, 78.03], [25.25, 77.5], [25.15, 77.25], [25.25, 77.0], [25.03, 76.47], [24.5, 76.25], [24.25, 76.35], [24.0, 76.25], [23.75, 76.35], [23.5, 76.25], [23.25, 76.35], [23.0, 76.25], [22.75, 76.35], [22.5, 76.25], [21.97, 76.47], [21.82, 76.82], [21.75, 76.85], [21.5, 76.75], [21.25, 76.85], [21.0, 76.75], [20.47, 76.97], [20.32, 77.32], [20.25, 77.35], [20.0, 77.25], [19.75, 77.35], [19.68, 77.32], [19.53, 76.97], [19.0, 76.75], [18.75, 76.85], [18.5, 76.75], [18.25, 76.85], [18.18, 76.82], [18.03, 76.47], [17.5, 76.25], [17.25, 76.35], [17.0, 76.25], [16.75, 76.35], [16.5, 76.25], [16.25, 76.35], [16.0, 76.25], [15.75, 76.35], [15.5, 76.25], [15.25, 76.35], [15.0, 76.25], [14.5, 76.46], [14.0, 76.25], [13.47, 76.47], [13.32, 76.82], [12.97, 76.97], [12.75, 77.5], [12.87, 77.8], [12.75, 77.85], [12.5, 77.75], [12.25, 77.85], [12.0, 77.75], [11.47, 77.97], [11.32, 78.32], [10.97, 78.47], [10.75, 79.0]]]]}, "2023-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.75, 79.0], [10.97, 79.53], [11.5, 79.75], [11.75, 79.65], [12.0, 79.75], [12.25, 79.65], [12.5, 79.75], [12.75, 79.65], [13.0, 79.75], [13.25, 79.65], [13.5, 79.75], [13.75, 79.65], [14.0, 79.75], [14.25, 79.65], [14.5, 79.75], [14.75, 79.65], [15.0, 79.75], [15.25, 79.65], [15.5, 79.75], [15.75, 79.65], [16.0, 79.75], [16.5, 79.54], [17.0, 79.75], [17.25, 79.65], [17.5, 79.75], [17.75, 79.65], [18.0, 79.75], [18.25, 79.65], [18.5, 79.75], [18.75, 79.65], [19.0, 79.75], [19.25, 79.65], [19.5, 79.75], [19.75, 79.65], [20.0, 79.75], [20.25, 79.65], [20.5, 79.75], [21.03, 79.53], [21.25, 79.0], [21.13, 78.7], [21.25, 78.65], [21.5, 78.75], [21.75, 78.65], [22.0, 78.75], [22.25, 78.65], [22.5, 78.75], [22.75, 78.65], [23.0, 78.75], [23.53, 78.53], [23.68, 78.18], [23.75, 78.15], [24.0, 78.25], [24.25, 78.15], [24.5, 78.25], [25.03, 78.03], [25.25, 77.5], [25.15, 77.25], [25.25, 77.0], [25.03, 76.47], [24.5, 76.25], [24.25, 76.35], [24.0, 76.25], [23.75, 76.35], [23.5, 76.25], [23.25, 76.35], [23.0, 76.25], [22.75, 76.35], [22.5, 76.25], [21.97, 76.47], [21.82, 76.82], [21.75, 76.85], [21.5, 76.75], [21.25, 76.85], [21.0, 76.75], [20.47, 76.97], [20.32, 77.32], [20.25, 77.35], [20.0, 77.25], [19.75, 77.35], [19.68, 77.32], [19.53, 76.97], [19.0, 76.75], [18.75, 76.85], [18.5, 76.75], [18.25, 76.85], [18.18, 76.82], [18.03, 76.47], [17.5, 76.25], [17.25, 76.35], [17.0, 76.25], [16.75, 76.35], [16.5, 76.25], [16.25, 76.35], [16.0, 76.25], [15.75, 76.35], [15.5, 76.25], [15.25, 76.35], [15.0, 76.25], [14.5, 76.46], [14.0, 76.25], [13.47, 76.47], [13.32, 76.82], [12.97, 76.97], [12.75, 77.5], [12.87, 77.8], [12.75, 77.85], [12.5, 77.75], [12.25, 77.85], [12.0, 77.75], [11.47, 77.97], [11.32, 78.32], [10.97, 78.47], [10.75, 79.0]]]]}, "2023-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.75, 79.0], [10.97, 79.53], [11.5, 79.75], [11.75, 79.65], [12.0, 79.75], [12.25, 79.65], [12.5, 79.75], [12.75, 79.65], [13.0, 79.75], [13.25, 79.65], [13.5, 79.75], [13.75, 79.65], [14.0, 79.75], [14.25, 79.65], [14.5, 79.75], [14.75, 79.65], [15.0, 79.75], [15.53, 79.53], [15.68, 79.18], [15.75, 79.15], [16.0, 79.25], [16.25, 79.15], [16.5, 79.25], [16.75, 79.15], [16.82, 79.18], [16.97, 79.53], [17.5, 79.75], [17.75, 79.65], [18.0, 79.75], [18.25, 79.65], [18.5, 79.75], [18.75, 79.65], [19.0, 79.75], [19.25, 79.65], [19.5, 79.75], [19.75, 79.65], [20.0, 79.75], [20.25, 79.65], [20.5, 79.75], [21.03, 79.53], [21.25, 79.0], [21.13, 78.7], [21.25, 78.65], [21.5, 78.75], [21.75, 78.65], [22.0, 78.75], [22.25, 78.65], [22.5, 78.75], [22.75, 78.65], [23.0, 78.75], [23.53, 78.53], [23.68, 78.18], [23.75, 78.15], [24.0, 78.25], [24.25, 78.15], [24.5, 78.25], [25.03, 78.03], [25.25, 77.5], [25.15, 77.25], [25.25, 77.0], [25.03, 76.47], [24.5, 76.25], [24.25, 76.35], [24.0, 76.25], [23.75, 76.35], [23.5, 76.25], [23.25, 76.35], [23.0, 76.25], [22.75, 76.35], [22.5, 76.25], [21.97, 76.47], [21.82, 76.82], [21.75, 76.85], [21.5, 76.75], [21.25, 76.85], [21.0, 76.75], [20.47, 76.97], [20.32, 77.32], [20.25, 77.35], [20.0, 77.25], [19.75, 77.35], [19.68, 77.32], [19.53, 76.97], [19.0, 76.75], [18.5, 76.96], [18.18, 76.82], [18.03, 76.47], [17.5, 76.25], [17.25, 76.35], [17.0, 76.25], [16.75, 76.35], [16.5, 76.25], [16.25, 76.35], [16.0, 76.25], [15.75, 76.35], [15.5, 76.25], [15.25, 76.35], [15.0, 76.25], [14.5, 76.46], [14.0, 76.25], [13.47, 76.47], [13.32, 76.82], [12.97, 76.97], [12.75, 77.5], [12.87, 77.8], [12.75, 77.85], [12.5, 77.75], [12.25, 77.85], [12.0, 77.75], [11.47, 77.97], [11.32, 78.32], [10.97, 78.47], [10.75, 79.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.300967002894083}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.2350341586949485}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-9.533335765248182, -9.1332564248616, -9.295860522023986, -8.666180303407373, -8.651653280634605, -7.703968035184403, -6.334136161517506, -7.208839541322959, -6.669594917328993]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-9.533335765248182, -10.035652493324221, -10.858200242127793, -10.921852214701232, -11.402978995778653, -12.634131342714738, -12.746897998641543, -15.19630803484398, -13.72073211322595]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.089370748391673, -5.724173781172089, -5.706150362025892, -5.138559663303788, -5.447737497776308, -5.316361777909899, -4.88649222661342, -5.624939228779511, -5.039835350348481]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.089370748391673, -6.264179484895067, -6.1643026683852895, -5.958886034357533, -6.124864276145729, -8.129141334036376, -7.638447975796396, -10.300967002894083, -8.303977675025692]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.37419219949564, -1.6182862869739416, -1.5685827670366679, -1.4327860162741222, -1.5837784463377558, -1.6608790162487224, -1.7452834077725938, -1.9907466011380701, -1.788400401882291]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.37419219949564, -1.8060944095884617, -1.6537826870787822, -1.490775432556838, -1.7690451136883525, -2.1742299340851066, -2.642920662325233, -2.851447379999777, -2.349090833307317]}}