{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:17:59.296201", "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-Sep-09_to_2018-Sep-11_264.5_32.0"}, "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": 2018090000410}, "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": "September 09 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 11 2018"}, "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": 55157.99048364678}, "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"]}, "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": 32.0}, "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": 264.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "264.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 262.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 264.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.03, 31.53], [-97.68, 31.68], [-97.65, 31.75], [-97.75, 32.0], [-97.65, 32.25], [-97.75, 32.5], [-97.65, 32.75], [-97.75, 33.0], [-97.53, 33.53], [-97.0, 33.75], [-96.75, 33.65], [-96.5, 33.75], [-96.25, 33.65], [-96.0, 33.75], [-95.47, 33.53], [-95.32, 33.18], [-94.97, 33.03], [-94.75, 32.5], [-94.85, 32.25], [-94.75, 32.0], [-94.85, 31.75], [-94.75, 31.5], [-94.97, 30.97], [-95.32, 30.82], [-95.47, 30.47], [-95.82, 30.32], [-95.97, 29.97], [-96.5, 29.75], [-97.0, 29.96], [-97.5, 29.75], [-98.03, 29.97], [-98.25, 30.5], [-98.15, 30.75], [-98.25, 31.0], [-98.03, 31.53]]]]}, "2018-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.03, 31.53], [-97.68, 31.68], [-97.65, 31.75], [-97.75, 32.0], [-97.65, 32.25], [-97.75, 32.5], [-97.65, 32.75], [-97.75, 33.0], [-97.53, 33.53], [-97.0, 33.75], [-96.75, 33.65], [-96.5, 33.75], [-96.25, 33.65], [-96.0, 33.75], [-95.47, 33.53], [-95.32, 33.18], [-94.97, 33.03], [-94.75, 32.5], [-94.85, 32.25], [-94.75, 32.0], [-94.85, 31.75], [-94.75, 31.5], [-94.97, 30.97], [-95.32, 30.82], [-95.47, 30.47], [-95.82, 30.32], [-95.97, 29.97], [-96.5, 29.75], [-97.0, 29.96], [-97.5, 29.75], [-98.03, 29.97], [-98.25, 30.5], [-98.15, 30.75], [-98.25, 31.0], [-98.03, 31.53]]]]}, "2018-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-98.03, 31.53], [-97.68, 31.68], [-97.65, 31.75], [-97.75, 32.0], [-97.65, 32.25], [-97.75, 32.5], [-97.65, 32.75], [-97.75, 33.0], [-97.53, 33.53], [-97.0, 33.75], [-96.75, 33.65], [-96.5, 33.75], [-96.25, 33.65], [-96.0, 33.75], [-95.47, 33.53], [-95.32, 33.18], [-94.97, 33.03], [-94.75, 32.5], [-94.85, 32.25], [-94.75, 32.0], [-94.85, 31.75], [-94.75, 31.5], [-94.97, 30.97], [-95.32, 30.82], [-95.47, 30.47], [-95.82, 30.32], [-95.97, 29.97], [-96.5, 29.75], [-97.0, 29.96], [-97.5, 29.75], [-98.03, 29.97], [-98.25, 30.5], [-98.15, 30.75], [-98.25, 31.0], [-98.03, 31.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.740279708252672}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.786171725098554}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.500621929226327, 22.70167344371282, 22.56259215174606]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.5472595960984, 21.993898284948443, 21.37019168702676]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3771896492437925, -3.9863387685629164, -3.994986757488954]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.915586669121069, -4.56108645314788, -4.740279708252672]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5184625166423953, -1.7615683134142603, -1.7408984912827306]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7532042195948936, -2.2112504086414875, -2.1731131892913864]}}