{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:29.049848", "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": "2017-Jul-29_to_2017-Aug-03_284.5_36.5"}, "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": 2017070001022}, "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": "July 29 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 03 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 254205.26590728122}, "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": ["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": 36.5}, "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": 277.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 291.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-07-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.0, 37.75], [-76.75, 37.65], [-76.5, 37.75], [-75.97, 37.53], [-75.75, 37.0], [-75.97, 36.47], [-76.5, 36.25], [-76.75, 36.35], [-77.0, 36.25], [-77.3, 36.38], [-77.47, 35.97], [-78.0, 35.75], [-78.53, 35.97], [-78.75, 36.5], [-78.53, 37.03], [-78.0, 37.25], [-77.7, 37.12], [-77.53, 37.53], [-77.0, 37.75]]]]}, "2017-07-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.5, 33.75], [-81.25, 33.65], [-81.18, 33.68], [-81.03, 34.03], [-80.5, 34.25], [-80.25, 34.15], [-80.0, 34.25], [-79.75, 34.15], [-79.5, 34.25], [-79.25, 34.15], [-79.18, 34.18], [-79.04, 34.5], [-79.25, 35.0], [-79.03, 35.53], [-78.68, 35.68], [-78.54, 36.0], [-78.75, 36.5], [-78.53, 37.03], [-78.0, 37.25], [-77.7, 37.12], [-77.53, 37.53], [-77.0, 37.75], [-76.75, 37.65], [-76.5, 37.75], [-76.25, 37.65], [-76.0, 37.75], [-75.75, 37.65], [-75.5, 37.75], [-75.25, 37.65], [-75.0, 37.75], [-74.47, 37.53], [-74.32, 37.18], [-74.25, 37.15], [-74.18, 37.18], [-74.15, 37.25], [-74.25, 37.5], [-74.15, 37.75], [-74.25, 38.0], [-74.03, 38.53], [-73.68, 38.68], [-73.53, 39.03], [-73.18, 39.18], [-73.03, 39.53], [-72.5, 39.75], [-72.25, 39.65], [-72.0, 39.75], [-71.75, 39.65], [-71.5, 39.75], [-71.25, 39.65], [-71.0, 39.75], [-70.75, 39.65], [-70.5, 39.75], [-70.25, 39.65], [-70.0, 39.75], [-69.75, 39.65], [-69.5, 39.75], [-69.25, 39.65], [-69.0, 39.75], [-68.47, 39.53], [-68.25, 39.0], [-68.35, 38.75], [-68.25, 38.5], [-68.47, 37.97], [-68.82, 37.82], [-68.97, 37.47], [-69.32, 37.32], [-69.47, 36.97], [-70.0, 36.75], [-70.25, 36.85], [-70.5, 36.75], [-70.75, 36.85], [-70.82, 36.82], [-70.97, 36.47], [-71.32, 36.32], [-71.47, 35.97], [-72.0, 35.75], [-72.3, 35.88], [-72.47, 35.47], [-73.0, 35.25], [-73.25, 35.35], [-73.5, 35.25], [-74.0, 35.46], [-74.32, 35.32], [-74.47, 34.97], [-74.82, 34.82], [-74.97, 34.47], [-75.5, 34.25], [-75.75, 34.35], [-75.82, 34.32], [-75.97, 33.97], [-76.5, 33.75], [-76.75, 33.85], [-77.0, 33.75], [-77.25, 33.85], [-77.32, 33.82], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.32, 33.32], [-78.47, 32.97], [-79.0, 32.75], [-79.25, 32.85], [-79.32, 32.82], [-79.47, 32.47], [-79.82, 32.32], [-79.97, 31.97], [-80.5, 31.75], [-80.75, 31.85], [-81.0, 31.75], [-81.25, 31.85], [-81.5, 31.75], [-81.75, 31.85], [-82.0, 31.75], [-82.53, 31.97], [-82.75, 32.5], [-82.53, 33.03], [-82.18, 33.18], [-82.03, 33.53], [-81.5, 33.75]]]]}, "2017-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.65, 33.25], [-82.75, 33.5], [-82.53, 34.03], [-82.0, 34.25], [-81.75, 34.15], [-81.68, 34.18], [-81.53, 34.53], [-81.0, 34.75], [-80.47, 34.53], [-80.32, 34.18], [-80.25, 34.15], [-80.0, 34.25], [-79.75, 34.15], [-79.5, 34.25], [-79.25, 34.15], [-79.18, 34.18], [-79.15, 34.25], [-79.25, 34.5], [-79.15, 34.75], [-79.25, 35.0], [-79.03, 35.53], [-78.68, 35.68], [-78.54, 36.0], [-78.75, 36.5], [-78.53, 37.03], [-78.0, 37.25], [-77.7, 37.12], [-77.53, 37.53], [-77.0, 37.75], [-76.75, 37.65], [-76.5, 37.75], [-76.25, 37.65], [-76.0, 37.75], [-75.75, 37.65], [-75.5, 37.75], [-75.25, 37.65], [-75.0, 37.75], [-74.47, 37.53], [-74.32, 37.18], [-74.25, 37.15], [-74.18, 37.18], [-74.15, 37.25], [-74.25, 37.5], [-74.15, 37.75], [-74.25, 38.0], [-74.03, 38.53], [-73.68, 38.68], [-73.53, 39.03], [-73.18, 39.18], [-73.03, 39.53], [-72.5, 39.75], [-72.25, 39.65], [-72.0, 39.75], [-71.75, 39.65], [-71.5, 39.75], [-71.25, 39.65], [-71.0, 39.75], [-70.75, 39.65], [-70.5, 39.75], [-70.25, 39.65], [-70.0, 39.75], [-69.75, 39.65], [-69.5, 39.75], [-69.25, 39.65], [-69.0, 39.75], [-68.47, 39.53], [-68.25, 39.0], [-68.35, 38.75], [-68.25, 38.5], [-68.35, 38.25], [-68.25, 38.0], [-68.47, 37.47], [-69.0, 37.25], [-69.25, 37.35], [-69.32, 37.32], [-69.47, 36.97], [-70.0, 36.75], [-70.25, 36.85], [-70.5, 36.75], [-70.75, 36.85], [-70.82, 36.82], [-70.97, 36.47], [-71.32, 36.32], [-71.47, 35.97], [-72.0, 35.75], [-72.3, 35.88], [-72.47, 35.47], [-73.0, 35.25], [-73.25, 35.35], [-73.5, 35.25], [-74.0, 35.46], [-74.32, 35.32], [-74.47, 34.97], [-74.82, 34.82], [-74.97, 34.47], [-75.5, 34.25], [-75.75, 34.35], [-75.82, 34.32], [-75.97, 33.97], [-76.5, 33.75], [-76.75, 33.85], [-77.0, 33.75], [-77.25, 33.85], [-77.32, 33.82], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.32, 33.32], [-78.47, 32.97], [-79.0, 32.75], [-79.25, 32.85], [-79.32, 32.82], [-79.47, 32.47], [-79.82, 32.32], [-79.97, 31.97], [-80.5, 31.75], [-80.75, 31.85], [-81.0, 31.75], [-81.25, 31.85], [-81.5, 31.75], [-81.75, 31.85], [-82.0, 31.75], [-82.53, 31.97], [-82.75, 32.5], [-82.65, 32.75], [-82.75, 33.0], [-82.65, 33.25]]]]}, "2017-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.65, 33.25], [-82.75, 33.5], [-82.53, 34.03], [-82.0, 34.25], [-81.75, 34.15], [-81.68, 34.18], [-81.53, 34.53], [-81.0, 34.75], [-80.47, 34.53], [-80.32, 34.18], [-80.25, 34.15], [-80.0, 34.25], [-79.75, 34.15], [-79.5, 34.25], [-79.25, 34.15], [-79.18, 34.18], [-79.15, 34.25], [-79.25, 34.5], [-79.15, 34.75], [-79.25, 35.0], [-79.03, 35.53], [-78.68, 35.68], [-78.53, 36.03], [-78.18, 36.18], [-78.03, 36.53], [-77.5, 36.75], [-77.25, 36.65], [-77.18, 36.68], [-77.03, 37.03], [-76.68, 37.18], [-76.53, 37.53], [-76.0, 37.75], [-75.75, 37.65], [-75.5, 37.75], [-75.25, 37.65], [-75.0, 37.75], [-74.47, 37.53], [-74.32, 37.18], [-74.25, 37.15], [-74.18, 37.18], [-74.15, 37.25], [-74.25, 37.5], [-74.15, 37.75], [-74.25, 38.0], [-74.03, 38.53], [-73.68, 38.68], [-73.53, 39.03], [-73.18, 39.18], [-73.03, 39.53], [-72.5, 39.75], [-72.25, 39.65], [-72.0, 39.75], [-71.75, 39.65], [-71.5, 39.75], [-71.25, 39.65], [-71.0, 39.75], [-70.75, 39.65], [-70.5, 39.75], [-70.25, 39.65], [-70.0, 39.75], [-69.75, 39.65], [-69.5, 39.75], [-69.25, 39.65], [-69.0, 39.75], [-68.47, 39.53], [-68.25, 39.0], [-68.35, 38.75], [-68.25, 38.5], [-68.35, 38.25], [-68.25, 38.0], [-68.47, 37.47], [-69.0, 37.25], [-69.25, 37.35], [-69.32, 37.32], [-69.47, 36.97], [-70.0, 36.75], [-70.25, 36.85], [-70.5, 36.75], [-70.75, 36.85], [-70.82, 36.82], [-70.97, 36.47], [-71.32, 36.32], [-71.47, 35.97], [-72.0, 35.75], [-72.3, 35.88], [-72.47, 35.47], [-73.0, 35.25], [-73.25, 35.35], [-73.5, 35.25], [-74.0, 35.46], [-74.32, 35.32], [-74.47, 34.97], [-74.82, 34.82], [-74.97, 34.47], [-75.5, 34.25], [-75.75, 34.35], [-75.82, 34.32], [-75.97, 33.97], [-76.5, 33.75], [-76.75, 33.85], [-77.0, 33.75], [-77.25, 33.85], [-77.32, 33.82], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.32, 33.32], [-78.47, 32.97], [-79.0, 32.75], [-79.25, 32.85], [-79.32, 32.82], [-79.47, 32.47], [-79.82, 32.32], [-79.97, 31.97], [-80.5, 31.75], [-80.75, 31.85], [-81.0, 31.75], [-81.25, 31.85], [-81.5, 31.75], [-81.75, 31.85], [-82.0, 31.75], [-82.53, 31.97], [-82.75, 32.5], [-82.65, 32.75], [-82.75, 33.0], [-82.65, 33.25]]]]}, "2017-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.53, 34.03], [-82.0, 34.25], [-81.75, 34.15], [-81.68, 34.18], [-81.53, 34.53], [-81.0, 34.75], [-80.47, 34.53], [-80.25, 34.0], [-80.35, 33.75], [-80.25, 33.5], [-80.47, 32.97], [-80.82, 32.82], [-80.85, 32.75], [-80.75, 32.5], [-80.97, 31.97], [-81.5, 31.75], [-81.75, 31.85], [-82.0, 31.75], [-82.53, 31.97], [-82.75, 32.5], [-82.65, 32.75], [-82.75, 33.0], [-82.65, 33.25], [-82.75, 33.5], [-82.53, 34.03]]], [[[-78.25, 35.15], [-78.18, 35.18], [-78.03, 35.53], [-77.5, 35.75], [-76.97, 35.53], [-76.75, 35.0], [-76.97, 34.47], [-77.32, 34.32], [-77.47, 33.97], [-77.82, 33.82], [-77.97, 33.47], [-78.5, 33.25], [-79.03, 33.47], [-79.25, 34.0], [-79.15, 34.25], [-79.25, 34.5], [-79.03, 35.03], [-78.5, 35.25], [-78.25, 35.15]]], [[[-76.25, 36.0], [-76.15, 36.25], [-76.25, 36.5], [-76.15, 36.75], [-76.25, 37.0], [-76.03, 37.53], [-75.5, 37.75], [-74.97, 37.53], [-74.75, 37.0], [-74.85, 36.75], [-74.82, 36.68], [-74.47, 36.53], [-74.25, 36.0], [-74.35, 35.75], [-74.25, 35.5], [-74.47, 34.97], [-75.0, 34.75], [-75.25, 34.85], [-75.32, 34.82], [-75.47, 34.47], [-76.0, 34.25], [-76.53, 34.47], [-76.75, 35.0], [-76.53, 35.53], [-76.18, 35.68], [-76.15, 35.75], [-76.25, 36.0]]], [[[-70.25, 39.15], [-70.0, 39.25], [-69.75, 39.15], [-69.5, 39.25], [-69.25, 39.15], [-69.0, 39.25], [-68.47, 39.03], [-68.25, 38.5], [-68.35, 38.25], [-68.25, 38.0], [-68.47, 37.47], [-69.0, 37.25], [-69.25, 37.35], [-69.5, 37.25], [-69.75, 37.35], [-70.0, 37.25], [-70.25, 37.35], [-70.5, 37.25], [-71.03, 37.47], [-71.25, 38.0], [-71.15, 38.25], [-71.25, 38.5], [-71.03, 39.03], [-70.5, 39.25], [-70.25, 39.15]]]]}, "2017-08-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.03, 37.03], [-75.5, 37.25], [-74.97, 37.03], [-74.82, 36.68], [-74.47, 36.53], [-74.25, 36.0], [-74.47, 35.47], [-75.0, 35.25], [-75.25, 35.35], [-75.5, 35.25], [-76.03, 35.47], [-76.25, 36.0], [-76.15, 36.25], [-76.25, 36.5], [-76.03, 37.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.285592240089727}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.614481443966214}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.299965906816396, 23.259619659776206, 23.14559864815169, 23.357827709703145, 23.925720007542566, 23.686289660672458]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.965776314702737, 21.11211748401655, 21.425420226623146, 21.71504591255149, 22.818444800236023, 23.41168396690898]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7700915382998423, -2.602113178110346, -2.811492461567555, -2.556172836896172, -2.1733005439605475, -2.04284788136664]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.910702550559563, -3.5451845448698123, -4.285592240089727, -4.094196802567012, -3.042098270914323, -2.125505449512275]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2548825929506746, -1.7624843977327203, -1.836111557070725, -1.7132725720684627, -1.4509928947863537, -1.593830059781089]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3021671274332602, -2.2115533004746704, -2.208785132921264, -2.1747863352119423, -1.7487268319693925, -1.6439587491162526]}}