{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:29.260312", "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-31_to_2017-Aug-04_259.5_34.5"}, "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": 2017070001083}, "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 31 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 04 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 97758.62834303662}, "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": ["C.North-America", "N.Central-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": 34.5}, "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": 259.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "259.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 256.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 261.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.75, 35.5], [-101.53, 36.03], [-101.0, 36.25], [-100.75, 36.15], [-100.5, 36.25], [-100.25, 36.15], [-100.0, 36.25], [-99.47, 36.03], [-99.25, 35.5], [-99.47, 34.97], [-99.87, 34.8], [-99.75, 34.5], [-99.97, 33.97], [-100.5, 33.75], [-101.0, 33.96], [-101.5, 33.75], [-102.03, 33.97], [-102.25, 34.5], [-102.03, 35.03], [-101.68, 35.18], [-101.65, 35.25], [-101.75, 35.5]]]]}, "2017-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.25, 33.0], [-104.03, 33.53], [-103.68, 33.68], [-103.53, 34.03], [-103.0, 34.25], [-102.75, 34.15], [-102.68, 34.18], [-102.53, 34.53], [-102.18, 34.68], [-102.03, 35.03], [-101.68, 35.18], [-101.65, 35.25], [-101.75, 35.5], [-101.53, 36.03], [-101.0, 36.25], [-100.75, 36.15], [-100.5, 36.25], [-100.25, 36.15], [-100.0, 36.25], [-99.47, 36.03], [-99.25, 35.5], [-99.37, 35.2], [-98.97, 35.03], [-98.82, 34.68], [-98.47, 34.53], [-98.25, 34.0], [-98.35, 33.75], [-98.25, 33.5], [-98.47, 32.97], [-99.0, 32.75], [-99.25, 32.85], [-99.5, 32.75], [-99.75, 32.85], [-99.82, 32.82], [-99.97, 32.47], [-100.32, 32.32], [-100.47, 31.97], [-101.0, 31.75], [-101.25, 31.85], [-101.5, 31.75], [-101.75, 31.85], [-102.0, 31.75], [-102.25, 31.85], [-102.5, 31.75], [-102.75, 31.85], [-103.0, 31.75], [-103.53, 31.97], [-103.68, 32.32], [-104.03, 32.47], [-104.25, 33.0]]]]}, "2017-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.25, 33.0], [-104.03, 33.53], [-103.68, 33.68], [-103.53, 34.03], [-103.0, 34.25], [-102.75, 34.15], [-102.68, 34.18], [-102.53, 34.53], [-102.18, 34.68], [-102.03, 35.03], [-101.68, 35.18], [-101.65, 35.25], [-101.75, 35.5], [-101.53, 36.03], [-101.0, 36.25], [-100.75, 36.15], [-100.5, 36.25], [-100.25, 36.15], [-100.0, 36.25], [-99.47, 36.03], [-99.25, 35.5], [-99.37, 35.2], [-98.97, 35.03], [-98.82, 34.68], [-98.47, 34.53], [-98.25, 34.0], [-98.35, 33.75], [-98.25, 33.5], [-98.47, 32.97], [-99.0, 32.75], [-99.25, 32.85], [-99.5, 32.75], [-99.75, 32.85], [-99.82, 32.82], [-99.96, 32.5], [-99.75, 32.0], [-99.97, 31.47], [-100.5, 31.25], [-101.03, 31.47], [-101.18, 31.82], [-101.25, 31.85], [-101.5, 31.75], [-101.75, 31.85], [-102.0, 31.75], [-102.25, 31.85], [-102.5, 31.75], [-102.75, 31.85], [-103.0, 31.75], [-103.53, 31.97], [-103.68, 32.32], [-104.03, 32.47], [-104.25, 33.0]]]]}, "2017-08-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.25, 33.0], [-104.03, 33.53], [-103.68, 33.68], [-103.53, 34.03], [-103.0, 34.25], [-102.75, 34.15], [-102.68, 34.18], [-102.53, 34.53], [-102.0, 34.75], [-101.75, 34.65], [-101.68, 34.68], [-101.53, 35.03], [-101.0, 35.25], [-100.75, 35.15], [-100.5, 35.25], [-100.25, 35.15], [-100.0, 35.25], [-99.75, 35.15], [-99.5, 35.25], [-98.97, 35.03], [-98.82, 34.68], [-98.47, 34.53], [-98.25, 34.0], [-98.35, 33.75], [-98.25, 33.5], [-98.47, 32.97], [-99.0, 32.75], [-99.25, 32.85], [-99.5, 32.75], [-99.75, 32.85], [-99.82, 32.82], [-99.96, 32.5], [-99.75, 32.0], [-99.97, 31.47], [-100.5, 31.25], [-101.03, 31.47], [-101.18, 31.82], [-101.25, 31.85], [-101.5, 31.75], [-101.75, 31.85], [-102.0, 31.75], [-102.25, 31.85], [-102.5, 31.75], [-102.75, 31.85], [-103.0, 31.75], [-103.53, 31.97], [-103.68, 32.32], [-104.03, 32.47], [-104.25, 33.0]]]]}, "2017-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.03, 31.47], [-101.25, 32.0], [-101.03, 32.53], [-100.5, 32.75], [-99.97, 32.53], [-99.75, 32.0], [-99.97, 31.47], [-100.5, 31.25], [-101.03, 31.47]]], [[[-101.75, 34.5], [-101.53, 35.03], [-101.0, 35.25], [-100.75, 35.15], [-100.5, 35.25], [-99.97, 35.03], [-99.75, 34.5], [-99.97, 33.97], [-100.5, 33.75], [-100.75, 33.85], [-101.0, 33.75], [-101.53, 33.97], [-101.75, 34.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.730993828921385}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.528901295024714}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.013858122628505, 23.312590765133564, 22.906962243124156, 24.249974553662412, 25.007745049126754]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.08297749956222, 20.904696788272418, 21.281880716864066, 22.662102913723686, 24.123051720380943]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9401132759085535, -4.573924940611628, -5.082544041801589, -4.021516438361874, -3.7196110018026047]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.318746806012655, -6.182896625547528, -6.730993828921385, -4.480582239001478, -4.153894523610006]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3919350326701778, -1.7153743913826212, -1.910516994512347, -1.5312587987620654, -1.355498922226359]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.492207229103609, -2.262527314365451, -2.415621470798102, -1.9496597997997154, -1.4087262118581825]}}