{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:53.949983", "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": "2011-Nov-19_to_2011-Nov-23_241.0_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": 2011110000967}, "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 19 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 23 2011"}, "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": 63827.46241633986}, "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": ["N.Central-America", "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": ["North Pacific 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": 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": 241.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "241.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 239.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 243.25}, "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": 36.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-11-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.25, 35.0], [-121.03, 35.53], [-120.5, 35.75], [-119.97, 35.53], [-119.82, 35.18], [-119.5, 35.04], [-119.0, 35.25], [-118.47, 35.03], [-118.25, 34.5], [-118.47, 33.97], [-119.0, 33.75], [-119.5, 33.96], [-120.0, 33.75], [-120.53, 33.97], [-120.68, 34.32], [-121.03, 34.47], [-121.25, 35.0]]]]}, "2011-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.25, 35.0], [-121.03, 35.53], [-120.68, 35.68], [-120.65, 35.75], [-120.75, 36.0], [-120.53, 36.53], [-120.0, 36.75], [-119.47, 36.53], [-119.25, 36.0], [-119.03, 36.53], [-118.5, 36.75], [-118.25, 36.65], [-118.0, 36.75], [-117.47, 36.53], [-117.25, 36.0], [-117.35, 35.75], [-117.25, 35.5], [-117.47, 34.97], [-117.87, 34.8], [-117.82, 34.68], [-117.75, 34.65], [-117.5, 34.75], [-116.97, 34.53], [-116.82, 34.18], [-116.47, 34.03], [-116.25, 33.5], [-116.35, 33.25], [-116.25, 33.0], [-116.35, 32.75], [-116.25, 32.5], [-116.35, 32.25], [-116.25, 32.0], [-116.47, 31.47], [-117.0, 31.25], [-117.53, 31.47], [-117.75, 32.0], [-117.65, 32.25], [-117.75, 32.5], [-117.65, 32.75], [-117.68, 32.82], [-117.75, 32.85], [-118.0, 32.75], [-118.53, 32.97], [-118.68, 33.32], [-118.75, 33.35], [-119.0, 33.25], [-119.25, 33.35], [-119.5, 33.25], [-120.03, 33.47], [-120.18, 33.82], [-120.53, 33.97], [-120.68, 34.32], [-121.03, 34.47], [-121.25, 35.0]], [[-119.35, 35.75], [-119.3, 35.63], [-119.18, 35.68], [-119.15, 35.75], [-119.25, 36.0], [-119.35, 35.75]]]]}, "2011-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.25, 35.0], [-121.03, 35.53], [-120.68, 35.68], [-120.65, 35.75], [-120.75, 36.0], [-120.53, 36.53], [-120.0, 36.75], [-119.47, 36.53], [-119.25, 36.0], [-119.03, 36.53], [-118.5, 36.75], [-118.25, 36.65], [-118.0, 36.75], [-117.47, 36.53], [-117.25, 36.0], [-117.35, 35.75], [-117.25, 35.5], [-117.47, 34.97], [-117.87, 34.8], [-117.82, 34.68], [-117.75, 34.65], [-117.5, 34.75], [-116.97, 34.53], [-116.82, 34.18], [-116.47, 34.03], [-116.25, 33.5], [-116.35, 33.25], [-116.25, 33.0], [-116.35, 32.75], [-116.25, 32.5], [-116.35, 32.25], 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anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.670943040027737}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.772969886854511}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.06991224927333, 9.114611799893282, 9.138204079404886, 9.499462278038948, 13.973818676189353]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.759000118619042, 0.28536992071337863, -0.4429689256980964, -0.8161943082302514, 13.795995592504767]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.390460425871481, -3.967049207353583, -4.0382768200087025, -3.520921978279043, -1.949084085355679]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.309577528461716, -6.144348326730608, -6.908028537454754, -7.670943040027737, -2.0059466567622053]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.384255495806193, -1.5327873501628047, -1.6667080829912473, -1.4477962318978057, -1.4012285215038967]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4429133527238798, -1.9761509199424845, -2.180597115924934, -2.2660958982350556, -1.4099717759311314]}}