{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:43:53.733473", "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-29_to_2010-Jan-31_284.5_43.5"}, "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": 2010010000933}, "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 29 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 31 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": 86559.64573456158}, "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": ["E.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": 43.5}, "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": 284.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "284.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 279.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 286.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.25, 42.0], [-81.03, 42.53], [-80.5, 42.75], [-80.25, 42.65], [-80.0, 42.75], [-79.75, 42.65], [-79.68, 42.68], [-79.65, 42.75], [-79.75, 43.0], [-79.53, 43.53], [-79.0, 43.75], [-78.75, 43.65], [-78.5, 43.75], [-78.25, 43.65], [-78.0, 43.75], [-77.75, 43.65], [-77.5, 43.75], [-77.25, 43.65], [-77.0, 43.75], [-76.75, 43.65], [-76.68, 43.68], [-76.53, 44.03], [-76.0, 44.25], [-75.75, 44.15], [-75.5, 44.25], [-75.25, 44.15], [-75.0, 44.25], [-74.75, 44.15], [-74.5, 44.25], [-74.25, 44.15], [-74.0, 44.25], [-73.47, 44.03], [-73.25, 43.5], [-73.47, 42.97], [-73.82, 42.82], [-73.85, 42.75], [-73.75, 42.5], [-73.85, 42.25], [-73.75, 42.0], [-73.97, 41.47], [-74.5, 41.25], [-74.75, 41.35], [-75.0, 41.25], [-75.53, 41.47], [-75.68, 41.82], [-75.75, 41.85], [-76.0, 41.75], [-76.25, 41.85], [-76.5, 41.75], [-76.75, 41.85], [-76.82, 41.82], [-76.97, 41.47], [-77.5, 41.25], [-77.75, 41.35], [-77.82, 41.32], [-77.97, 40.97], [-78.5, 40.75], [-78.75, 40.85], [-78.82, 40.82], [-78.97, 40.47], [-79.5, 40.25], [-80.03, 40.47], [-80.18, 40.82], [-80.53, 40.97], [-80.68, 41.32], [-81.03, 41.47], [-81.25, 42.0]]]]}, "2010-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.25, 42.0], [-81.03, 42.53], [-80.5, 42.75], [-80.25, 42.65], [-80.0, 42.75], [-79.75, 42.65], [-79.68, 42.68], [-79.65, 42.75], [-79.75, 43.0], [-79.53, 43.53], [-79.0, 43.75], [-78.75, 43.65], [-78.5, 43.75], [-78.25, 43.65], [-78.0, 43.75], [-77.75, 43.65], [-77.5, 43.75], [-77.25, 43.65], [-77.0, 43.75], [-76.75, 43.65], [-76.68, 43.68], [-76.53, 44.03], [-76.0, 44.25], [-75.75, 44.15], [-75.5, 44.25], [-75.25, 44.15], [-75.0, 44.25], [-74.75, 44.15], [-74.5, 44.25], [-74.25, 44.15], [-74.0, 44.25], [-73.47, 44.03], [-73.25, 43.5], [-73.47, 42.97], [-73.82, 42.82], [-73.85, 42.75], [-73.75, 42.5], [-73.85, 42.25], [-73.75, 42.0], [-73.97, 41.47], [-74.5, 41.25], [-74.75, 41.35], [-75.0, 41.25], [-75.53, 41.47], [-75.68, 41.82], [-75.75, 41.85], [-76.0, 41.75], [-76.25, 41.85], [-76.5, 41.75], [-76.75, 41.85], [-76.82, 41.82], [-76.97, 41.47], [-77.5, 41.25], [-77.75, 41.35], [-77.82, 41.32], [-77.97, 40.97], [-78.5, 40.75], [-78.75, 40.85], [-78.82, 40.82], [-78.97, 40.47], [-79.5, 40.25], [-80.03, 40.47], [-80.18, 40.82], [-80.53, 40.97], [-80.68, 41.32], [-81.03, 41.47], [-81.25, 42.0]]]]}, "2010-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.25, 42.0], [-81.03, 42.53], [-80.5, 42.75], [-80.25, 42.65], [-80.0, 42.75], [-79.75, 42.65], [-79.68, 42.68], [-79.65, 42.75], [-79.75, 43.0], [-79.53, 43.53], [-79.0, 43.75], [-78.75, 43.65], [-78.5, 43.75], [-78.25, 43.65], [-78.0, 43.75], [-77.75, 43.65], [-77.5, 43.75], [-77.25, 43.65], [-77.0, 43.75], [-76.75, 43.65], [-76.68, 43.68], [-76.53, 44.03], [-76.0, 44.25], [-75.75, 44.15], [-75.5, 44.25], [-75.25, 44.15], [-75.0, 44.25], [-74.75, 44.15], [-74.5, 44.25], [-74.25, 44.15], [-74.0, 44.25], [-73.47, 44.03], [-73.25, 43.5], [-73.47, 42.97], [-73.82, 42.82], [-73.85, 42.75], [-73.75, 42.5], [-73.85, 42.25], [-73.75, 42.0], [-73.97, 41.47], [-74.5, 41.25], [-74.75, 41.35], [-75.0, 41.25], [-75.53, 41.47], [-75.68, 41.82], [-75.75, 41.85], [-76.0, 41.75], [-76.25, 41.85], [-76.5, 41.75], [-76.75, 41.85], [-76.82, 41.82], [-76.97, 41.47], [-77.5, 41.25], [-77.75, 41.35], [-77.82, 41.32], [-77.97, 40.97], [-78.5, 40.75], [-78.75, 40.85], [-78.82, 40.82], [-78.97, 40.47], [-79.5, 40.25], [-80.03, 40.47], [-80.18, 40.82], [-80.53, 40.97], [-80.68, 41.32], [-81.03, 41.47], [-81.25, 42.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.596881795678513}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.516004266309894}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-14.003960469021877, -16.044327164359515, -13.752371702115454]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-18.883382658077835, -21.449216849130153, -17.571817503798655]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.652298938281362, -10.990827613682741, -8.904886246965564]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.448764834445342, -13.596881795678513, -10.683417159641579]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5206389461804932, -1.9405322311572042, -1.5702507163387829]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.820871839777986, -2.304967202382367, -1.8932467984618215]}}