{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:21:00.312282", "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": "2019-Dec-03_to_2019-Dec-05_281.5_25.5"}, "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": 2019120000161}, "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": "December 03 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 05 2019"}, "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": 72726.08000154518}, "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": ["Bahamas"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Caribbean", "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": ["North Atlantic Ocean"]}, "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": 25.5}, "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": 281.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "281.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 281.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 285.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-12-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.15, 24.75], [-79.25, 25.0], [-79.15, 25.25], [-79.25, 25.5], [-79.03, 26.03], [-78.5, 26.25], [-78.2, 26.12], [-78.15, 26.25], [-78.25, 26.5], [-78.03, 27.03], [-77.5, 27.25], [-77.25, 27.15], [-77.0, 27.25], [-76.75, 27.15], [-76.5, 27.25], [-75.97, 27.03], [-75.82, 26.68], [-75.75, 26.65], [-75.5, 26.75], [-75.25, 26.65], [-75.0, 26.75], [-74.47, 26.53], [-74.25, 26.0], [-74.47, 25.47], [-74.82, 25.32], [-74.97, 24.97], [-75.32, 24.82], [-75.47, 24.47], [-76.0, 24.25], [-76.25, 24.35], [-76.32, 24.32], [-76.47, 23.97], [-76.82, 23.82], [-76.85, 23.75], [-76.75, 23.5], [-76.97, 22.97], [-77.5, 22.75], [-77.75, 22.85], [-78.0, 22.75], [-78.53, 22.97], [-78.68, 23.32], [-79.03, 23.47], [-79.25, 24.0], [-79.15, 24.25], [-79.25, 24.5], [-79.15, 24.75]], [[-77.18, 25.18], [-77.15, 25.25], [-77.18, 25.32], [-77.25, 25.35], [-77.37, 25.3], [-77.32, 25.18], [-77.25, 25.15], [-77.18, 25.18]]]]}, "2019-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.15, 24.75], [-79.25, 25.0], [-79.15, 25.25], [-79.25, 25.5], [-79.03, 26.03], [-78.5, 26.25], [-78.2, 26.12], [-78.15, 26.25], [-78.25, 26.5], [-78.03, 27.03], [-77.5, 27.25], [-77.25, 27.15], [-77.0, 27.25], [-76.75, 27.15], [-76.5, 27.25], [-75.97, 27.03], [-75.82, 26.68], [-75.75, 26.65], [-75.5, 26.75], [-75.25, 26.65], [-75.0, 26.75], [-74.47, 26.53], [-74.25, 26.0], [-74.47, 25.47], [-74.82, 25.32], [-74.97, 24.97], [-75.32, 24.82], [-75.47, 24.47], [-76.0, 24.25], [-76.25, 24.35], [-76.32, 24.32], [-76.47, 23.97], [-76.82, 23.82], [-76.85, 23.75], [-76.75, 23.5], [-76.97, 22.97], [-77.5, 22.75], [-77.75, 22.85], [-78.0, 22.75], [-78.53, 22.97], [-78.68, 23.32], [-79.03, 23.47], [-79.25, 24.0], [-79.15, 24.25], [-79.25, 24.5], [-79.15, 24.75]], [[-77.18, 25.18], [-77.15, 25.25], [-77.18, 25.32], [-77.25, 25.35], [-77.37, 25.3], [-77.32, 25.18], [-77.25, 25.15], [-77.18, 25.18]]]]}, "2019-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.15, 24.75], [-79.25, 25.0], [-79.15, 25.25], [-79.25, 25.5], [-79.03, 26.03], [-78.5, 26.25], [-78.2, 26.12], [-78.15, 26.25], [-78.25, 26.5], [-78.03, 27.03], [-77.5, 27.25], [-77.25, 27.15], [-77.0, 27.25], [-76.75, 27.15], [-76.5, 27.25], [-75.97, 27.03], [-75.82, 26.68], [-75.75, 26.65], [-75.5, 26.75], [-75.25, 26.65], [-75.0, 26.75], [-74.47, 26.53], [-74.25, 26.0], [-74.47, 25.47], [-74.82, 25.32], [-74.97, 24.97], [-75.32, 24.82], [-75.47, 24.47], [-76.0, 24.25], [-76.25, 24.35], [-76.32, 24.32], [-76.47, 23.97], [-76.82, 23.82], [-76.85, 23.75], [-76.75, 23.5], [-76.97, 22.97], [-77.5, 22.75], [-77.75, 22.85], [-78.0, 22.75], [-78.53, 22.97], [-78.68, 23.32], [-79.03, 23.47], [-79.25, 24.0], [-79.15, 24.25], [-79.25, 24.5], [-79.15, 24.75]], [[-77.18, 25.18], [-77.15, 25.25], [-77.18, 25.32], [-77.25, 25.35], [-77.37, 25.3], [-77.32, 25.18], [-77.25, 25.15], [-77.18, 25.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.1948999090754455}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1049333942064377}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.65691634433415, 21.399813789495738, 21.961515960770384]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.00966214802787, 20.07955351266014, 20.83415564705865]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.1536053419019763, -2.3814183294059648, -1.7797765113113717]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.15792325427833, -3.1948999090754455, -2.3624625751297685]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7514929790755074, -1.8505188243997854, -1.3485085569637485]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5408068765543232, -2.285387243435812, -1.5401742650271535]}}