{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:13:09.715536", "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": "2018-Jul-07_to_2018-Jul-10_282.5_36.0"}, "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": 2018070000405}, "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 07 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 10 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 84923.76822645341}, "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": 36.0}, "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": 282.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "282.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 278.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 284.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-07-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.53, 35.47], [-81.75, 36.0], [-81.53, 36.53], [-81.0, 36.75], [-80.75, 36.65], [-80.5, 36.75], [-80.25, 36.65], [-80.0, 36.75], [-79.75, 36.65], [-79.68, 36.68], [-79.53, 37.03], [-79.18, 37.18], [-79.15, 37.25], [-79.25, 37.5], [-79.03, 38.03], [-78.68, 38.18], [-78.53, 38.53], [-78.0, 38.75], [-77.47, 38.53], [-77.25, 38.0], [-77.37, 37.7], [-76.97, 37.53], [-76.75, 37.0], [-76.85, 36.75], [-76.75, 36.5], [-76.85, 36.25], [-76.75, 36.0], [-76.97, 35.47], [-77.32, 35.32], [-77.47, 34.97], [-78.0, 34.75], [-78.25, 34.85], [-78.5, 34.75], [-78.75, 34.85], [-79.0, 34.75], [-79.25, 34.85], [-79.5, 34.75], [-79.75, 34.85], [-80.0, 34.75], [-80.53, 34.97], [-80.68, 35.32], [-80.75, 35.35], [-81.0, 35.25], [-81.53, 35.47]]]]}, "2018-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.53, 35.47], [-81.75, 36.0], [-81.53, 36.53], [-81.0, 36.75], [-80.75, 36.65], [-80.5, 36.75], [-80.25, 36.65], [-80.0, 36.75], [-79.75, 36.65], [-79.68, 36.68], [-79.53, 37.03], [-79.18, 37.18], [-79.15, 37.25], [-79.25, 37.5], [-79.03, 38.03], [-78.68, 38.18], [-78.53, 38.53], [-78.0, 38.75], [-77.47, 38.53], [-77.25, 38.0], [-77.37, 37.7], [-76.97, 37.53], [-76.8, 37.12], [-76.5, 37.25], [-76.25, 37.15], [-76.0, 37.25], [-75.75, 37.15], [-75.5, 37.25], [-74.97, 37.03], [-74.75, 36.5], [-74.97, 35.97], [-75.32, 35.82], [-75.47, 35.47], [-75.82, 35.32], [-75.85, 35.25], [-75.75, 35.0], [-75.97, 34.47], [-76.5, 34.25], [-76.75, 34.35], [-77.0, 34.25], [-77.5, 34.46], [-78.0, 34.25], [-78.53, 34.47], [-78.68, 34.82], [-78.75, 34.85], [-79.0, 34.75], [-79.25, 34.85], [-79.5, 34.75], [-79.75, 34.85], [-80.0, 34.75], [-80.53, 34.97], [-80.68, 35.32], [-80.75, 35.35], [-81.0, 35.25], [-81.53, 35.47]]]]}, "2018-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.53, 35.47], [-81.75, 36.0], [-81.53, 36.53], [-81.0, 36.75], [-80.75, 36.65], [-80.5, 36.75], [-80.25, 36.65], [-80.0, 36.75], [-79.75, 36.65], [-79.68, 36.68], [-79.53, 37.03], [-79.18, 37.18], [-79.15, 37.25], [-79.25, 37.5], [-79.03, 38.03], [-78.68, 38.18], [-78.53, 38.53], [-78.0, 38.75], [-77.47, 38.53], [-77.25, 38.0], [-77.37, 37.7], [-76.97, 37.53], [-76.8, 37.12], [-76.5, 37.25], [-76.25, 37.15], [-76.0, 37.25], [-75.75, 37.15], [-75.5, 37.25], [-74.97, 37.03], [-74.75, 36.5], [-74.97, 35.97], [-75.32, 35.82], [-75.47, 35.47], [-75.82, 35.32], [-75.85, 35.25], [-75.75, 35.0], [-75.97, 34.47], [-76.5, 34.25], [-76.75, 34.35], [-77.0, 34.25], [-77.5, 34.46], [-78.0, 34.25], [-78.53, 34.47], [-78.68, 34.82], [-78.75, 34.85], [-79.0, 34.75], [-79.25, 34.85], [-79.5, 34.75], [-79.75, 34.85], [-80.0, 34.75], [-80.53, 34.97], [-80.68, 35.32], [-80.75, 35.35], [-81.0, 35.25], [-81.53, 35.47]]]]}, "2018-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-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], [-76.5, 37.25], [-76.25, 37.15], [-76.0, 37.25], [-75.75, 37.15], [-75.5, 37.25], [-74.97, 37.03], [-74.75, 36.5], [-74.97, 35.97], [-75.32, 35.82], [-75.47, 35.47], [-75.82, 35.32], [-75.85, 35.25], [-75.75, 35.0], [-75.97, 34.47], [-76.5, 34.25], [-76.75, 34.35], [-77.0, 34.25], [-77.5, 34.46], [-78.0, 34.25], [-78.53, 34.47], [-78.75, 35.0], [-78.65, 35.25], [-78.75, 35.5], [-78.53, 36.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.69905932195087}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.3728565634394077}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.119046803226468, 22.645189383893126, 22.74866407225568, 23.347324026073636]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.577953100127672, 21.715345978009452, 21.518867865912682, 22.744069437916437]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1366404060689437, -3.6237951052392647, -3.484655272420821, -2.863120058838478]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6450440678996188, -4.577923484963492, -4.69905932195087, -3.3024247353415035]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6008348231210905, -1.8925627019044389, -1.7507828428059289, -1.5227186888698454]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.981084526027143, -2.152654748932286, -2.174292444134399, -1.6969658375221166]}}