{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:43:53.651408", "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": "2010-Jan-29_to_2010-Feb-01_262.0_30.5"}, "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": 2010010000922}, "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": "January 29 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 01 2010"}, "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": 258235.9950446499}, "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": ["Mexico", "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": 30.5}, "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": 262.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "262.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 266.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.25, 31.5], [-101.15, 31.75], [-101.25, 32.0], [-101.03, 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[-101.18, 28.32], [-101.53, 28.47], [-101.75, 29.0], [-101.65, 29.25], [-101.75, 29.5], [-101.65, 29.75]]]]}, "2010-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.65, 29.75], [-101.75, 30.0], [-101.65, 30.25], [-101.75, 30.5], [-101.53, 31.03], [-101.18, 31.18], [-101.15, 31.25], [-101.25, 31.5], [-101.15, 31.75], [-101.25, 32.0], [-101.03, 32.53], [-100.68, 32.68], [-100.53, 33.03], [-100.18, 33.18], [-100.15, 33.25], [-100.25, 33.5], [-100.03, 34.03], [-99.5, 34.25], [-99.25, 34.15], [-99.0, 34.25], [-98.47, 34.03], [-98.32, 33.68], [-98.25, 33.65], [-98.0, 33.75], [-97.75, 33.65], [-97.5, 33.75], [-96.97, 33.53], [-96.75, 33.0], [-96.85, 32.75], [-96.75, 32.5], [-96.85, 32.25], [-96.82, 32.18], [-96.75, 32.15], [-96.5, 32.25], [-96.25, 32.15], [-96.0, 32.25], [-95.47, 32.03], [-95.32, 31.68], [-94.97, 31.53], [-94.82, 31.18], [-94.75, 31.15], [-94.5, 31.25], [-94.25, 31.15], [-94.0, 31.25], [-93.75, 31.15], [-93.5, 31.25], [-92.97, 31.03], [-92.75, 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27.85], [-100.5, 27.75], [-101.03, 27.97], [-101.18, 28.32], [-101.53, 28.47], [-101.75, 29.0], [-101.65, 29.25], [-101.75, 29.5], [-101.65, 29.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.00185162281241}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.323946359948447}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.28788807639483593, 2.0023140198947544, 1.9191181928500782, 4.033736891770559]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.887718687484835, -3.0718265911289677, -1.539562766220513, 0.39659318297464097]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.195032110809052, -8.863303955425689, -8.772375334839095, -7.166505997732971]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.180517364072386, -11.00185162281241, -10.330598174311206, -8.377805010261739]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6688618449189148, -1.7963881986471397, -1.6839946268938113, -1.3839968252309818]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9610859383680548, -2.0350771648413324, -1.9377138970517434, -1.6070952863691692]}}