{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:45:39.628480", "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": "2010-Sep-25_to_2010-Sep-27_1.0_50.5"}, "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": 2010090001121}, "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 25 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 27 2010"}, "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": 61174.05430424465}, "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": ["Belgium", "France", "Netherlands"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe", "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": ["English Channel", "North 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": 50.5}, "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": 1.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "1.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 0.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 4.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 52.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.0, 51.25], [1.25, 51.15], [1.32, 51.18], [1.47, 51.53], [2.0, 51.75], [2.25, 51.65], [2.32, 51.68], [2.47, 52.03], [3.0, 52.25], [3.25, 52.15], [3.32, 52.18], [3.47, 52.53], [4.0, 52.75], [4.53, 52.53], [4.75, 52.0], [4.65, 51.75], [4.75, 51.5], [4.65, 51.25], [4.75, 51.0], [4.65, 50.75], [4.68, 50.68], [5.03, 50.53], [5.25, 50.0], [5.03, 49.47], [4.5, 49.25], [4.25, 49.35], [4.0, 49.25], [3.75, 49.35], [3.5, 49.25], [3.25, 49.35], [3.0, 49.25], [2.75, 49.35], [2.68, 49.32], [2.65, 49.25], [2.75, 49.0], [2.65, 48.75], [2.75, 48.5], [2.53, 47.97], [2.0, 47.75], [1.47, 47.97], [1.32, 48.32], [0.97, 48.47], [0.82, 48.82], [0.47, 48.97], [0.32, 49.32], [-0.03, 49.47], [-0.25, 50.0], [-0.03, 50.53], [0.32, 50.68], [0.47, 51.03], [1.0, 51.25]]]]}, "2010-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.0, 51.25], [1.25, 51.15], [1.32, 51.18], [1.47, 51.53], [2.0, 51.75], [2.25, 51.65], [2.32, 51.68], [2.47, 52.03], [3.0, 52.25], [3.25, 52.15], [3.32, 52.18], [3.47, 52.53], [4.0, 52.75], [4.53, 52.53], [4.75, 52.0], [4.65, 51.75], [4.75, 51.5], [4.65, 51.25], [4.75, 51.0], [4.65, 50.75], [4.68, 50.68], [5.03, 50.53], [5.25, 50.0], [5.03, 49.47], [4.5, 49.25], [4.25, 49.35], [4.0, 49.25], [3.75, 49.35], [3.5, 49.25], [3.25, 49.35], [3.0, 49.25], [2.75, 49.35], [2.68, 49.32], [2.65, 49.25], [2.75, 49.0], [2.65, 48.75], [2.75, 48.5], [2.53, 47.97], [2.0, 47.75], [1.47, 47.97], [1.32, 48.32], [0.97, 48.47], [0.82, 48.82], [0.47, 48.97], [0.32, 49.32], [-0.03, 49.47], [-0.25, 50.0], [-0.03, 50.53], [0.32, 50.68], [0.47, 51.03], [1.0, 51.25]]]]}, "2010-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.0, 51.25], [1.25, 51.15], [1.32, 51.18], [1.47, 51.53], [2.0, 51.75], [2.25, 51.65], [2.32, 51.68], [2.47, 52.03], [3.0, 52.25], [3.25, 52.15], [3.32, 52.18], [3.47, 52.53], [4.0, 52.75], [4.53, 52.53], [4.75, 52.0], [4.65, 51.75], [4.75, 51.5], [4.65, 51.25], [4.75, 51.0], [4.65, 50.75], [4.68, 50.68], [5.03, 50.53], [5.25, 50.0], [5.03, 49.47], [4.5, 49.25], [4.25, 49.35], [4.0, 49.25], [3.75, 49.35], [3.5, 49.25], [3.25, 49.35], [3.0, 49.25], [2.75, 49.35], [2.68, 49.32], [2.65, 49.25], [2.75, 49.0], [2.65, 48.75], [2.75, 48.5], [2.53, 47.97], [2.0, 47.75], [1.47, 47.97], [1.32, 48.32], [0.97, 48.47], [0.82, 48.82], [0.47, 48.97], [0.32, 49.32], [-0.03, 49.47], [-0.25, 50.0], [-0.03, 50.53], [0.32, 50.68], [0.47, 51.03], [1.0, 51.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.025996305804654}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.3618891884005153}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.293596205350752, 10.78485733971388, 10.829277057534284]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.860435462858447, 8.632164732830972, 9.386418551853637]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.0881898223698894, -3.551360606215425, -3.446117136616232]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.323765753358714, -5.025996305804654, -4.224912187643724]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5665291090561333, -1.7546765878176294, -1.7003036430857537]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2894027739191736, -2.19538735024001, -2.0929852676983236]}}