{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:50.789675", "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-Jun-09_to_2010-Jun-11_258.0_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": 2010060000348}, "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": "June 09 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 11 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": 69767.38098167832}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "N.W.North-America"]}, "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": 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": 258.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "258.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 254.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 259.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-06-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.03, 52.97], [-106.25, 53.5], [-106.03, 54.03], [-105.5, 54.25], [-105.25, 54.15], [-105.0, 54.25], [-104.75, 54.15], [-104.5, 54.25], [-104.25, 54.15], [-104.0, 54.25], [-103.75, 54.15], [-103.5, 54.25], [-103.25, 54.15], [-103.0, 54.25], [-102.75, 54.15], [-102.5, 54.25], [-101.97, 54.03], [-101.82, 53.68], [-101.47, 53.53], [-101.32, 53.18], [-101.25, 53.15], [-101.0, 53.25], [-100.47, 53.03], [-100.32, 52.68], [-99.97, 52.53], [-99.75, 52.0], [-99.85, 51.75], [-99.75, 51.5], [-99.97, 50.97], [-100.32, 50.82], [-100.47, 50.47], [-101.0, 50.25], [-101.25, 50.35], [-101.5, 50.25], [-101.75, 50.35], [-102.0, 50.25], [-102.53, 50.47], [-102.68, 50.82], [-103.03, 50.97], [-103.18, 51.32], [-103.25, 51.35], [-103.5, 51.25], [-103.75, 51.35], [-104.0, 51.25], [-104.53, 51.47], [-104.68, 51.82], [-105.03, 51.97], [-105.25, 52.5], [-105.15, 52.75], [-105.18, 52.82], [-105.25, 52.85], [-105.5, 52.75], [-106.03, 52.97]]]]}, "2010-06-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.03, 52.97], [-106.25, 53.5], [-106.03, 54.03], [-105.5, 54.25], [-105.25, 54.15], [-105.0, 54.25], [-104.75, 54.15], [-104.5, 54.25], [-104.25, 54.15], [-104.0, 54.25], [-103.75, 54.15], [-103.5, 54.25], [-103.25, 54.15], [-103.0, 54.25], [-102.75, 54.15], [-102.5, 54.25], [-101.97, 54.03], [-101.82, 53.68], [-101.47, 53.53], [-101.32, 53.18], [-101.25, 53.15], [-101.0, 53.25], [-100.47, 53.03], [-100.32, 52.68], [-99.97, 52.53], [-99.75, 52.0], [-99.85, 51.75], [-99.75, 51.5], [-99.97, 50.97], [-100.32, 50.82], [-100.47, 50.47], [-101.0, 50.25], [-101.25, 50.35], [-101.5, 50.25], [-101.75, 50.35], [-102.0, 50.25], [-102.53, 50.47], [-102.68, 50.82], [-103.03, 50.97], [-103.18, 51.32], [-103.25, 51.35], [-103.5, 51.25], [-103.75, 51.35], [-104.0, 51.25], [-104.53, 51.47], [-104.68, 51.82], [-105.03, 51.97], [-105.25, 52.5], [-105.15, 52.75], [-105.18, 52.82], [-105.25, 52.85], [-105.5, 52.75], [-106.03, 52.97]]]]}, "2010-06-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.03, 52.97], [-106.25, 53.5], [-106.03, 54.03], [-105.5, 54.25], [-105.25, 54.15], [-105.0, 54.25], [-104.75, 54.15], [-104.5, 54.25], [-104.25, 54.15], [-104.0, 54.25], [-103.75, 54.15], [-103.5, 54.25], [-103.25, 54.15], [-103.0, 54.25], [-102.75, 54.15], [-102.5, 54.25], [-101.97, 54.03], [-101.82, 53.68], [-101.47, 53.53], [-101.32, 53.18], [-101.25, 53.15], [-101.0, 53.25], [-100.47, 53.03], [-100.32, 52.68], [-99.97, 52.53], [-99.75, 52.0], [-99.85, 51.75], [-99.75, 51.5], [-99.97, 50.97], [-100.32, 50.82], [-100.47, 50.47], [-101.0, 50.25], [-101.25, 50.35], [-101.5, 50.25], [-101.75, 50.35], [-102.0, 50.25], [-102.53, 50.47], [-102.68, 50.82], [-103.03, 50.97], [-103.18, 51.32], [-103.25, 51.35], [-103.5, 51.25], [-103.75, 51.35], [-104.0, 51.25], [-104.53, 51.47], [-104.68, 51.82], [-105.03, 51.97], [-105.25, 52.5], [-105.15, 52.75], [-105.18, 52.82], [-105.25, 52.85], [-105.5, 52.75], [-106.03, 52.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.418141987040485}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.420484904485439}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.735937744000864, 8.323180746574906, 9.450515914249877]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.647587422931792, 6.847659933667728, 8.391241657702437]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.34173241962891, -5.879168785620817, -5.040553508206585]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.418141987040485, -6.369904131994417, -5.680745700636294]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4320748456435408, -1.6589369108449281, -1.4697365025113003]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7140045510271829, -1.7926619615572574, -1.6661848683486382]}}