{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:30.232524", "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-Nov-12_to_2018-Nov-15_249.0_35.5"}, "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": 2018110000438}, "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": "November 12 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 15 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": 62574.161717193216}, "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": ["W.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": 35.5}, "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": 249.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "249.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 248.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 252.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-11-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.15, 36.25], [-112.25, 36.5], [-112.03, 37.03], [-111.5, 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36.5], [-112.03, 37.03], [-111.5, 37.25], [-111.07, 37.07], [-111.25, 37.5], [-111.03, 38.03], [-110.5, 38.25], [-110.0, 38.04], [-109.5, 38.25], [-108.97, 38.03], [-108.82, 37.68], [-108.47, 37.53], [-108.32, 37.18], [-108.25, 37.15], [-108.0, 37.25], [-107.47, 37.03], [-107.25, 36.5], [-107.35, 36.25], [-107.25, 36.0], [-107.47, 35.47], [-108.0, 35.25], [-108.25, 35.35], [-108.5, 35.25], [-108.93, 35.43], [-108.75, 35.0], [-108.85, 34.75], [-108.75, 34.5], [-108.97, 33.97], [-109.5, 33.75], [-109.75, 33.85], [-110.0, 33.75], [-110.25, 33.85], [-110.5, 33.75], [-111.03, 33.97], [-111.18, 34.32], [-111.53, 34.47], [-111.68, 34.82], [-112.03, 34.97], [-112.25, 35.5], [-112.15, 35.75], [-112.25, 36.0], [-112.15, 36.25]], [[-110.75, 36.65], [-110.62, 36.7], [-110.68, 36.82], [-110.93, 36.93], [-110.82, 36.68], [-110.75, 36.65]], [[-109.37, 35.7], [-109.07, 35.57], [-109.2, 35.88], [-109.32, 35.82], [-109.37, 35.7]]]]}, "2018-11-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.15, 36.25], [-112.25, 36.5], [-112.03, 37.03], [-111.5, 37.25], [-111.07, 37.07], [-111.25, 37.5], [-111.03, 38.03], [-110.5, 38.25], [-110.0, 38.04], [-109.5, 38.25], [-108.97, 38.03], [-108.82, 37.68], [-108.47, 37.53], [-108.32, 37.18], [-108.25, 37.15], [-108.0, 37.25], [-107.47, 37.03], [-107.25, 36.5], [-107.35, 36.25], [-107.25, 36.0], [-107.47, 35.47], [-108.0, 35.25], [-108.25, 35.35], [-108.5, 35.25], [-108.93, 35.43], [-108.75, 35.0], [-108.85, 34.75], [-108.75, 34.5], [-108.97, 33.97], [-109.5, 33.75], [-109.75, 33.85], [-110.0, 33.75], [-110.25, 33.85], [-110.5, 33.75], [-111.03, 33.97], [-111.18, 34.32], [-111.53, 34.47], [-111.68, 34.82], [-112.03, 34.97], [-112.25, 35.5], [-112.15, 35.75], [-112.25, 36.0], [-112.15, 36.25]], [[-110.75, 36.65], [-110.62, 36.7], [-110.68, 36.82], [-110.93, 36.93], [-110.82, 36.68], [-110.75, 36.65]], [[-109.37, 35.7], [-109.07, 35.57], [-109.2, 35.88], [-109.32, 35.82], [-109.37, 35.7]]]]}, 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1.8955049475255805]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.482021621459041, -8.457451344207543, -5.7519932810145065, -5.090775969579113]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.957866354850637, -9.551820332397938, -7.0190677233072165, -5.23066830824132]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8245049946431728, -2.405161165864884, -1.6101390340237176, -1.4260354841842844]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.121132330091924, -2.67707340584959, -1.9999318802527364, -1.4777356665999248]}}