{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:31.483223", "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": "2021-May-06_to_2021-May-08_15.5_52.5"}, "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": 2021050000384}, "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": "May 06 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 08 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 77738.6993018207}, "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": ["Poland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["West&Central-Europe"]}, "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": []}, "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": 52.5}, "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": 15.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "15.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, 52.5], [14.97, 53.03], [15.32, 53.18], [15.47, 53.53], [16.0, 53.75], [16.25, 53.65], [16.32, 53.68], [16.47, 54.03], [16.82, 54.18], [16.97, 54.53], [17.5, 54.75], [17.75, 54.65], [18.0, 54.75], [18.53, 54.53], [18.75, 54.0], [18.63, 53.7], [18.75, 53.65], [19.0, 53.75], [19.25, 53.65], [19.5, 53.75], [20.03, 53.53], [20.25, 53.0], [20.15, 52.75], [20.25, 52.5], [20.13, 52.2], [20.53, 52.03], [20.75, 51.5], [20.53, 50.97], [20.18, 50.82], [20.15, 50.75], [20.25, 50.5], [20.03, 49.97], [19.5, 49.75], [19.25, 49.85], [19.0, 49.75], [18.75, 49.85], [18.5, 49.75], [17.97, 49.97], [17.82, 50.32], [17.75, 50.35], [17.5, 50.25], [16.97, 50.47], [16.82, 50.82], [16.47, 50.97], [16.32, 51.32], [16.25, 51.35], [16.0, 51.25], [15.47, 51.47], [15.32, 51.82], [14.97, 51.97], [14.75, 52.5]]]]}, "2021-05-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, 52.5], [14.97, 53.03], [15.32, 53.18], [15.47, 53.53], [16.0, 53.75], [16.25, 53.65], [16.32, 53.68], [16.47, 54.03], [16.82, 54.18], [16.97, 54.53], [17.5, 54.75], [17.75, 54.65], [18.0, 54.75], [18.53, 54.53], [18.75, 54.0], [18.63, 53.7], [18.75, 53.65], [19.0, 53.75], [19.25, 53.65], [19.5, 53.75], [20.03, 53.53], [20.25, 53.0], [20.15, 52.75], [20.25, 52.5], [20.13, 52.2], [20.53, 52.03], [20.75, 51.5], [20.53, 50.97], [20.18, 50.82], [20.15, 50.75], [20.25, 50.5], [20.03, 49.97], [19.5, 49.75], [19.25, 49.85], [19.0, 49.75], [18.75, 49.85], [18.5, 49.75], [17.97, 49.97], [17.82, 50.32], [17.75, 50.35], [17.5, 50.25], [16.97, 50.47], [16.82, 50.82], [16.47, 50.97], [16.32, 51.32], [16.25, 51.35], [16.0, 51.25], [15.47, 51.47], [15.32, 51.82], [14.97, 51.97], [14.75, 52.5]]]]}, "2021-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.75, 52.5], [14.97, 53.03], [15.32, 53.18], [15.47, 53.53], [16.0, 53.75], [16.25, 53.65], [16.32, 53.68], [16.47, 54.03], [16.82, 54.18], [16.97, 54.53], [17.5, 54.75], [17.75, 54.65], [18.0, 54.75], [18.53, 54.53], [18.75, 54.0], [18.63, 53.7], [18.75, 53.65], [19.0, 53.75], [19.25, 53.65], [19.5, 53.75], [20.03, 53.53], [20.25, 53.0], [20.15, 52.75], [20.25, 52.5], [20.13, 52.2], [20.53, 52.03], [20.75, 51.5], [20.53, 50.97], [20.18, 50.82], [20.15, 50.75], [20.25, 50.5], [20.03, 49.97], [19.5, 49.75], [19.25, 49.85], [19.0, 49.75], [18.75, 49.85], [18.5, 49.75], [17.97, 49.97], [17.82, 50.32], [17.75, 50.35], [17.5, 50.25], [16.97, 50.47], [16.82, 50.82], [16.47, 50.97], [16.32, 51.32], [16.25, 51.35], [16.0, 51.25], [15.47, 51.47], [15.32, 51.82], [14.97, 51.97], [14.75, 52.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.527345742649516}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.604592928713365}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.85705937737049, 6.576744526544644, 7.388837629600175]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.178617765104093, 5.684870278468736, 6.079916414777188]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.035739200450028, -6.312670127017058, -5.465369458673004]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.728990718818238, -7.527345742649516, -6.148200471315931]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3443524370228872, -1.6935435671083534, -1.4935430831296708]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5177631623202426, -2.006470241089191, -1.6893807434490937]}}