{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:43:49.628827", "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-Jan-07_to_2010-Jan-09_251.5_42.0"}, "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": 2010010000266}, "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": "January 07 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 09 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": 64885.98257678411}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": 42.0}, "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": 251.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "251.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 249.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 253.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.53, 41.47], [-110.75, 42.0], [-110.53, 42.53], [-110.0, 42.75], [-109.75, 42.65], [-109.5, 42.75], [-109.25, 42.65], [-109.0, 42.75], [-108.75, 42.65], [-108.68, 42.68], [-108.65, 42.75], [-108.75, 43.0], [-108.53, 43.53], [-108.0, 43.75], [-107.75, 43.65], [-107.5, 43.75], [-106.97, 43.53], [-106.82, 43.18], [-106.47, 43.03], [-106.25, 42.5], [-106.35, 42.25], [-106.25, 42.0], [-106.35, 41.75], [-106.32, 41.68], [-105.97, 41.53], [-105.75, 41.0], [-105.85, 40.75], [-105.75, 40.5], [-105.97, 39.97], [-106.5, 39.75], [-107.0, 39.96], [-107.5, 39.75], [-107.75, 39.85], [-107.82, 39.82], [-107.97, 39.47], [-108.5, 39.25], [-108.75, 39.35], [-109.0, 39.25], [-109.25, 39.35], [-109.5, 39.25], [-110.03, 39.47], [-110.25, 40.0], [-110.03, 40.53], [-109.68, 40.68], [-109.54, 41.0], [-109.68, 41.32], [-109.75, 41.35], [-110.0, 41.25], [-110.53, 41.47]]]]}, "2010-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.53, 41.47], [-110.75, 42.0], [-110.53, 42.53], [-110.0, 42.75], [-109.75, 42.65], [-109.5, 42.75], [-109.25, 42.65], [-109.0, 42.75], [-108.75, 42.65], [-108.68, 42.68], [-108.65, 42.75], [-108.75, 43.0], [-108.53, 43.53], [-108.0, 43.75], [-107.75, 43.65], [-107.5, 43.75], [-106.97, 43.53], [-106.82, 43.18], [-106.47, 43.03], [-106.25, 42.5], [-106.35, 42.25], [-106.25, 42.0], [-106.35, 41.75], [-106.32, 41.68], [-105.97, 41.53], [-105.75, 41.0], [-105.85, 40.75], [-105.75, 40.5], [-105.97, 39.97], [-106.5, 39.75], [-107.0, 39.96], [-107.5, 39.75], [-107.75, 39.85], [-107.82, 39.82], [-107.97, 39.47], [-108.5, 39.25], [-108.75, 39.35], [-109.0, 39.25], [-109.25, 39.35], [-109.5, 39.25], [-110.03, 39.47], [-110.25, 40.0], [-110.03, 40.53], [-109.68, 40.68], [-109.54, 41.0], [-109.68, 41.32], [-109.75, 41.35], [-110.0, 41.25], [-110.53, 41.47]]]]}, "2010-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.53, 41.47], [-110.75, 42.0], [-110.53, 42.53], [-110.0, 42.75], [-109.75, 42.65], [-109.5, 42.75], [-109.25, 42.65], [-109.0, 42.75], [-108.75, 42.65], [-108.68, 42.68], [-108.65, 42.75], [-108.75, 43.0], [-108.53, 43.53], [-108.0, 43.75], [-107.75, 43.65], [-107.5, 43.75], [-106.97, 43.53], [-106.82, 43.18], [-106.47, 43.03], [-106.25, 42.5], [-106.35, 42.25], [-106.25, 42.0], [-106.35, 41.75], [-106.32, 41.68], [-105.97, 41.53], [-105.75, 41.0], [-105.85, 40.75], [-105.75, 40.5], [-105.97, 39.97], [-106.5, 39.75], [-107.0, 39.96], [-107.5, 39.75], [-107.75, 39.85], [-107.82, 39.82], [-107.97, 39.47], [-108.5, 39.25], [-108.75, 39.35], [-109.0, 39.25], [-109.25, 39.35], [-109.5, 39.25], [-110.03, 39.47], [-110.25, 40.0], [-110.03, 40.53], [-109.68, 40.68], [-109.54, 41.0], [-109.68, 41.32], [-109.75, 41.35], [-110.0, 41.25], [-110.53, 41.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -16.721685820466234}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.393585783412991}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.3665155852687, -21.39773471646609, -16.018433736456473]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-23.6256546776078, -24.26521240630666, -21.424506201295884]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.506210061154913, -13.949359490051425, -8.725187799032632]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-16.721685820466234, -16.701509662835008, -12.236455989233178]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.188982018010736, -2.6826338800225495, -1.6712507171384752]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.9110037444375845, -3.107688222698545, -2.246468648667313]}}