{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:11.873197", "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-29_to_2012-Sep-01_312.5_78.0"}, "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": 2012080001276}, "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 29 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 01 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": 125410.671860212}, "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": ["Greenland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": 78.0}, "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": 312.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "312.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 300.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 323.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 75.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 80.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-60.03, 78.03], [-59.5, 78.25], [-59.25, 78.15], [-59.0, 78.25], [-58.75, 78.15], [-58.5, 78.25], [-58.25, 78.15], [-58.18, 78.18], [-58.03, 78.53], [-57.5, 78.75], [-57.25, 78.65], [-57.0, 78.75], [-56.75, 78.65], [-56.5, 78.75], [-56.25, 78.65], [-56.0, 78.75], [-55.75, 78.65], [-55.5, 78.75], [-55.25, 78.65], [-55.0, 78.75], [-54.75, 78.65], [-54.5, 78.75], [-54.25, 78.65], [-54.0, 78.75], [-53.75, 78.65], [-53.68, 78.68], [-53.53, 79.03], [-53.0, 79.25], [-52.5, 79.04], [-52.0, 79.25], [-51.75, 79.15], [-51.5, 79.25], [-51.25, 79.15], [-51.0, 79.25], [-50.75, 79.15], [-50.5, 79.25], [-50.25, 79.15], [-50.0, 79.25], [-49.75, 79.15], [-49.5, 79.25], [-49.25, 79.15], [-49.0, 79.25], [-48.75, 79.15], [-48.5, 79.25], [-48.25, 79.15], [-48.18, 79.18], [-48.03, 79.53], [-47.5, 79.75], [-46.97, 79.53], [-46.82, 79.18], [-46.75, 79.15], [-46.5, 79.25], [-46.25, 79.15], [-46.0, 79.25], [-45.47, 79.03], [-45.32, 78.68], [-45.25, 78.65], [-45.0, 78.75], [-44.75, 78.65], [-44.5, 78.75], [-44.25, 78.65], [-44.0, 78.75], [-43.57, 78.57], [-43.75, 79.0], [-43.53, 79.53], [-43.0, 79.75], [-42.75, 79.65], [-42.5, 79.75], [-41.97, 79.53], [-41.75, 79.0], [-41.97, 78.47], [-42.5, 78.25], [-41.97, 78.03], [-41.82, 77.68], [-41.75, 77.65], [-41.5, 77.75], [-40.97, 77.53], [-40.8, 77.13], [-40.5, 77.25], [-39.97, 77.03], [-39.75, 76.5], [-39.97, 75.97], [-40.5, 75.75], [-41.03, 75.97], [-41.2, 76.38], [-41.5, 76.25], [-41.75, 76.35], [-42.0, 76.25], [-42.25, 76.35], [-42.5, 76.25], [-42.75, 76.35], [-43.0, 76.25], [-43.25, 76.35], [-43.5, 76.25], [-43.75, 76.35], [-44.0, 76.25], [-44.25, 76.35], [-44.5, 76.25], [-44.75, 76.35], [-45.0, 76.25], [-45.25, 76.35], [-45.5, 76.25], [-45.75, 76.35], [-46.0, 76.25], [-46.25, 76.35], [-46.5, 76.25], [-46.75, 76.35], [-47.0, 76.25], [-47.25, 76.35], [-47.5, 76.25], [-48.0, 76.46], [-48.5, 76.25], [-48.75, 76.35], [-49.0, 76.25], [-49.25, 76.35], [-49.32, 76.32], [-49.47, 75.97], [-50.0, 75.75], [-50.25, 75.85], [-50.32, 75.82], [-50.47, 75.47], [-51.0, 75.25], [-51.25, 75.35], [-51.5, 75.25], [-51.75, 75.35], [-52.0, 75.25], [-52.53, 75.47], [-52.68, 75.82], [-52.75, 75.85], [-53.0, 75.75], [-53.25, 75.85], [-53.5, 75.75], [-54.03, 75.97], [-54.18, 76.32], [-54.25, 76.35], [-54.5, 76.25], [-54.75, 76.35], [-55.0, 76.25], [-55.25, 76.35], [-55.5, 76.25], [-55.75, 76.35], [-56.0, 76.25], [-56.25, 76.35], [-56.5, 76.25], [-56.75, 76.35], [-57.0, 76.25], [-57.25, 76.35], [-57.5, 76.25], [-57.75, 76.35], [-58.0, 76.25], [-58.25, 76.35], [-58.5, 76.25], [-58.75, 76.35], [-59.0, 76.25], [-59.25, 76.35], [-59.5, 76.25], [-60.03, 76.47], [-60.25, 77.0], [-60.15, 77.25], [-60.25, 77.5], [-60.03, 78.03]], [[-42.75, 78.35], [-43.0, 78.25], [-42.75, 78.15], [-42.5, 78.25], [-42.75, 78.35]], [[-43.43, 78.43], [-43.32, 78.18], [-43.25, 78.15], [-43.0, 78.25], [-43.43, 78.43]]]]}, "2012-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-60.03, 78.03], [-59.5, 78.25], [-59.25, 78.15], [-59.0, 78.25], [-58.75, 78.15], [-58.5, 78.25], [-58.25, 78.15], [-58.18, 78.18], [-58.03, 78.53], [-57.5, 78.75], [-57.25, 78.65], [-57.0, 78.75], [-56.75, 78.65], [-56.5, 78.75], [-56.25, 78.65], [-56.0, 78.75], [-55.75, 78.65], [-55.5, 78.75], [-55.25, 78.65], [-55.0, 78.75], [-54.75, 78.65], [-54.5, 78.75], [-54.25, 78.65], [-54.0, 78.75], [-53.75, 78.65], [-53.68, 78.68], [-53.53, 79.03], [-53.0, 79.25], [-52.5, 79.04], [-52.0, 79.25], [-51.75, 79.15], [-51.5, 79.25], [-51.25, 79.15], [-51.0, 79.25], [-50.75, 79.15], [-50.5, 79.25], [-50.25, 79.15], [-50.18, 79.18], [-50.15, 79.25], [-50.25, 79.5], [-50.03, 80.03], [-49.5, 80.25], [-49.25, 80.15], [-49.0, 80.25], [-48.75, 80.15], [-48.5, 80.25], [-48.25, 80.15], [-48.0, 80.25], [-47.75, 80.15], [-47.5, 80.25], [-47.25, 80.15], [-47.0, 80.25], [-46.75, 80.15], [-46.5, 80.25], [-46.25, 80.15], [-46.0, 80.25], [-45.75, 80.15], [-45.5, 80.25], [-45.25, 80.15], [-45.0, 80.25], [-44.75, 80.15], [-44.5, 80.25], [-44.2, 80.13], [-44.03, 80.53], [-43.5, 80.75], [-42.97, 80.53], [-42.75, 80.0], [-42.85, 79.75], [-42.82, 79.68], [-42.75, 79.65], [-42.5, 79.75], [-42.25, 79.65], [-42.0, 79.75], [-41.47, 79.53], [-41.32, 79.18], [-41.25, 79.15], [-41.0, 79.25], [-40.47, 79.03], [-40.32, 78.68], [-40.25, 78.65], [-40.0, 78.75], [-39.75, 78.65], [-39.5, 78.75], [-38.97, 78.53], [-38.82, 78.18], [-38.75, 78.15], [-38.5, 78.25], [-38.25, 78.15], [-38.0, 78.25], [-37.75, 78.15], [-37.5, 78.25], [-37.25, 78.15], [-37.0, 78.25], [-36.47, 78.03], [-36.25, 77.5], [-36.47, 76.97], [-36.82, 76.82], [-36.97, 76.47], [-37.5, 76.25], [-37.75, 76.35], [-38.0, 76.25], [-38.25, 76.35], [-38.5, 76.25], [-38.75, 76.35], [-39.0, 76.25], [-39.25, 76.35], [-39.5, 76.25], [-39.75, 76.35], [-39.82, 76.32], [-39.97, 75.97], [-40.5, 75.75], [-41.03, 75.97], [-41.18, 76.32], [-41.25, 76.35], [-41.5, 76.25], [-41.75, 76.35], [-42.0, 76.25], [-42.25, 76.35], [-42.5, 76.25], [-42.75, 76.35], [-43.0, 76.25], [-43.25, 76.35], [-43.5, 76.25], [-43.75, 76.35], [-44.0, 76.25], [-44.25, 76.35], [-44.5, 76.25], [-44.75, 76.35], [-45.0, 76.25], [-45.25, 76.35], [-45.5, 76.25], [-45.75, 76.35], [-46.0, 76.25], [-46.25, 76.35], [-46.5, 76.25], [-46.75, 76.35], [-47.0, 76.25], [-47.25, 76.35], [-47.5, 76.25], [-48.0, 76.46], [-48.5, 76.25], [-48.75, 76.35], [-49.0, 76.25], [-49.25, 76.35], [-49.32, 76.32], [-49.47, 75.97], [-50.0, 75.75], [-50.25, 75.85], [-50.32, 75.82], [-50.47, 75.47], [-51.0, 75.25], [-51.25, 75.35], [-51.5, 75.25], [-51.75, 75.35], [-52.0, 75.25], [-52.53, 75.47], [-52.68, 75.82], [-52.75, 75.85], [-53.0, 75.75], [-53.25, 75.85], [-53.5, 75.75], [-54.03, 75.97], [-54.18, 76.32], [-54.25, 76.35], [-54.5, 76.25], [-54.75, 76.35], [-55.0, 76.25], [-55.25, 76.35], [-55.5, 76.25], [-55.75, 76.35], [-56.0, 76.25], [-56.25, 76.35], [-56.5, 76.25], [-56.75, 76.35], [-57.0, 76.25], [-57.25, 76.35], [-57.5, 76.25], [-57.75, 76.35], [-58.0, 76.25], [-58.25, 76.35], [-58.5, 76.25], [-58.75, 76.35], [-59.0, 76.25], [-59.25, 76.35], [-59.5, 76.25], [-60.03, 76.47], [-60.25, 77.0], [-60.15, 77.25], [-60.25, 77.5], [-60.03, 78.03]]]]}, "2012-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-60.03, 78.03], [-59.5, 78.25], [-59.25, 78.15], [-59.0, 78.25], [-58.75, 78.15], [-58.5, 78.25], [-58.25, 78.15], [-58.18, 78.18], [-58.03, 78.53], [-57.5, 78.75], [-57.25, 78.65], [-57.0, 78.75], [-56.75, 78.65], [-56.5, 78.75], [-56.25, 78.65], [-56.0, 78.75], [-55.75, 78.65], [-55.5, 78.75], [-55.25, 78.65], [-55.0, 78.75], [-54.75, 78.65], [-54.5, 78.75], [-54.25, 78.65], [-54.0, 78.75], [-53.75, 78.65], [-53.68, 78.68], [-53.53, 79.03], [-53.0, 79.25], [-52.5, 79.04], [-52.0, 79.25], [-51.75, 79.15], [-51.5, 79.25], [-51.25, 79.15], [-51.0, 79.25], [-50.75, 79.15], [-50.5, 79.25], [-50.25, 79.15], [-50.18, 79.18], [-50.15, 79.25], [-50.25, 79.5], [-50.03, 80.03], [-49.5, 80.25], [-49.25, 80.15], [-49.0, 80.25], [-48.75, 80.15], [-48.5, 80.25], [-48.25, 80.15], [-48.0, 80.25], [-47.75, 80.15], [-47.5, 80.25], [-47.25, 80.15], [-47.0, 80.25], [-46.75, 80.15], [-46.5, 80.25], [-46.25, 80.15], [-46.0, 80.25], [-45.75, 80.15], [-45.5, 80.25], [-45.25, 80.15], [-45.0, 80.25], [-44.75, 80.15], [-44.5, 80.25], [-44.2, 80.13], [-44.03, 80.53], [-43.5, 80.75], [-42.97, 80.53], [-42.75, 80.0], [-42.85, 79.75], [-42.82, 79.68], [-42.75, 79.65], [-42.5, 79.75], [-42.25, 79.65], [-42.0, 79.75], [-41.47, 79.53], [-41.32, 79.18], [-41.25, 79.15], [-41.0, 79.25], [-40.47, 79.03], [-40.32, 78.68], [-40.25, 78.65], [-40.0, 78.75], [-39.75, 78.65], [-39.5, 78.75], [-38.97, 78.53], [-38.82, 78.18], [-38.75, 78.15], [-38.5, 78.25], [-38.25, 78.15], [-38.0, 78.25], [-37.75, 78.15], [-37.5, 78.25], [-37.25, 78.15], [-37.0, 78.25], [-36.47, 78.03], [-36.25, 77.5], [-36.47, 76.97], [-36.82, 76.82], [-36.97, 76.47], [-37.5, 76.25], [-37.75, 76.35], [-38.0, 76.25], [-38.25, 76.35], [-38.5, 76.25], [-38.75, 76.35], [-39.0, 76.25], [-39.25, 76.35], [-39.5, 76.25], [-39.75, 76.35], [-39.82, 76.32], [-39.97, 75.97], [-40.5, 75.75], [-41.03, 75.97], [-41.18, 76.32], [-41.25, 76.35], [-41.5, 76.25], [-41.75, 76.35], [-42.0, 76.25], [-42.25, 76.35], [-42.5, 76.25], [-42.75, 76.35], [-43.0, 76.25], [-43.25, 76.35], [-43.5, 76.25], [-43.75, 76.35], [-44.0, 76.25], [-44.25, 76.35], [-44.5, 76.25], [-44.75, 76.35], [-45.0, 76.25], [-45.25, 76.35], [-45.5, 76.25], [-45.75, 76.35], [-46.0, 76.25], [-46.25, 76.35], [-46.5, 76.25], [-46.75, 76.35], [-47.0, 76.25], [-47.25, 76.35], [-47.5, 76.25], [-48.0, 76.46], [-48.5, 76.25], [-48.75, 76.35], [-49.0, 76.25], [-49.25, 76.35], [-49.32, 76.32], [-49.47, 75.97], [-50.0, 75.75], [-50.25, 75.85], [-50.32, 75.82], [-50.47, 75.47], [-51.0, 75.25], [-51.25, 75.35], [-51.5, 75.25], [-51.75, 75.35], [-52.0, 75.25], [-52.53, 75.47], [-52.68, 75.82], [-52.75, 75.85], [-53.0, 75.75], [-53.25, 75.85], [-53.5, 75.75], [-54.03, 75.97], [-54.18, 76.32], [-54.25, 76.35], [-54.5, 76.25], [-54.75, 76.35], [-55.0, 76.25], [-55.25, 76.35], [-55.5, 76.25], [-55.75, 76.35], [-56.0, 76.25], [-56.25, 76.35], [-56.5, 76.25], [-56.75, 76.35], [-57.0, 76.25], [-57.25, 76.35], [-57.5, 76.25], [-57.75, 76.35], [-58.0, 76.25], [-58.25, 76.35], [-58.5, 76.25], [-58.75, 76.35], [-59.0, 76.25], [-59.25, 76.35], [-59.5, 76.25], [-60.03, 76.47], [-60.25, 77.0], [-60.15, 77.25], [-60.25, 77.5], [-60.03, 78.03]]]]}, "2012-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.53, 79.03], [-50.18, 79.18], [-50.15, 79.25], [-50.25, 79.5], [-50.03, 80.03], [-49.5, 80.25], [-49.25, 80.15], [-49.0, 80.25], [-48.75, 80.15], [-48.5, 80.25], [-48.25, 80.15], [-48.0, 80.25], [-47.75, 80.15], [-47.5, 80.25], [-47.25, 80.15], [-47.0, 80.25], [-46.75, 80.15], [-46.5, 80.25], [-46.25, 80.15], [-46.0, 80.25], [-45.75, 80.15], [-45.5, 80.25], [-45.25, 80.15], [-45.0, 80.25], [-44.75, 80.15], [-44.5, 80.25], [-44.2, 80.13], [-44.03, 80.53], [-43.5, 80.75], [-42.97, 80.53], [-42.75, 80.0], [-42.85, 79.75], [-42.82, 79.68], [-42.75, 79.65], [-42.5, 79.75], [-42.25, 79.65], [-42.0, 79.75], [-41.47, 79.53], [-41.32, 79.18], [-41.25, 79.15], [-41.0, 79.25], [-40.47, 79.03], [-40.32, 78.68], [-40.25, 78.65], [-40.0, 78.75], [-39.75, 78.65], [-39.5, 78.75], [-38.97, 78.53], [-38.82, 78.18], [-38.75, 78.15], [-38.5, 78.25], [-38.25, 78.15], [-38.0, 78.25], [-37.75, 78.15], [-37.5, 78.25], [-37.25, 78.15], [-37.0, 78.25], [-36.47, 78.03], [-36.25, 77.5], [-36.47, 76.97], [-36.82, 76.82], [-36.97, 76.47], [-37.5, 76.25], [-37.75, 76.35], [-38.0, 76.25], [-38.25, 76.35], [-38.5, 76.25], [-38.75, 76.35], [-39.0, 76.25], [-39.25, 76.35], [-39.5, 76.25], [-39.75, 76.35], [-40.0, 76.25], [-40.25, 76.35], [-40.5, 76.25], [-40.75, 76.35], [-41.0, 76.25], [-41.25, 76.35], [-41.5, 76.25], [-42.03, 76.47], [-42.18, 76.82], [-42.25, 76.85], [-42.5, 76.75], [-42.75, 76.85], [-43.0, 76.75], [-43.25, 76.85], [-43.5, 76.75], [-43.75, 76.85], [-44.0, 76.75], [-44.25, 76.85], [-44.5, 76.75], [-44.75, 76.85], [-45.0, 76.75], [-45.25, 76.85], [-45.5, 76.75], [-45.75, 76.85], [-46.0, 76.75], [-46.25, 76.85], [-46.5, 76.75], [-47.03, 76.97], [-47.18, 77.32], [-47.25, 77.35], [-47.5, 77.25], [-47.75, 77.35], [-48.0, 77.25], [-48.25, 77.35], [-48.32, 77.32], [-48.47, 76.97], [-49.0, 76.75], [-49.25, 76.85], [-49.5, 76.75], [-50.03, 76.97], [-50.18, 77.32], [-50.53, 77.47], [-50.75, 78.0], [-50.65, 78.25], [-50.75, 78.5], [-50.53, 79.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.377521799477506}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.628940876594186}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-21.9666686591695, -23.133140307915227, -23.41900218143988, -23.50730174634876]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-25.364541837072323, -26.692172140840825, -26.58989914351625, -24.9433601970928]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.319629772213824, -6.905884513931668, -6.973171835540473, -5.840092350596198]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.146326509745705, -8.306802648348395, -8.377521799477506, -6.605517486211966]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4285620732277857, -1.557365155854323, -1.6029860400935803, -1.3815527273975778]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5118881858486317, -1.717825369952925, -1.9056183014535708, -1.509840460669462]}}