{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:48.651254", "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": "2013-Jul-01_to_2013-Jul-04_254.0_32.5"}, "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": 2013070000154}, "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 01 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 04 2013"}, "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": 63570.97700456061}, "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", "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": 32.5}, "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": 254.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "254.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 253.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 256.75}, "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": 36.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.0, 36.25], [-105.75, 36.15], [-105.68, 36.18], [-105.65, 36.25], [-105.75, 36.5], [-105.53, 37.03], [-105.0, 37.25], [-104.75, 37.15], [-104.5, 37.25], [-104.25, 37.15], [-104.0, 37.25], [-103.75, 37.15], [-103.5, 37.25], [-102.97, 37.03], [-102.75, 36.5], [-102.85, 36.25], [-102.75, 36.0], [-102.97, 35.47], [-103.5, 35.25], [-103.75, 35.35], [-104.0, 35.25], [-104.25, 35.35], [-104.32, 35.32], [-104.46, 35.0], [-104.25, 34.5], [-104.47, 33.97], [-104.82, 33.82], [-104.96, 33.5], [-104.75, 33.0], [-104.85, 32.75], [-104.82, 32.68], [-104.47, 32.53], [-104.25, 32.0], [-104.47, 31.47], [-105.0, 31.25], [-105.25, 31.35], [-105.5, 31.25], [-105.75, 31.35], [-106.0, 31.25], [-106.53, 31.47], [-106.75, 32.0], [-106.65, 32.25], [-106.75, 32.5], [-106.53, 33.03], [-106.18, 33.18], [-106.04, 33.5], [-106.25, 34.0], [-106.15, 34.25], [-106.18, 34.32], [-106.25, 34.35], [-106.5, 34.25], [-107.03, 34.47], [-107.25, 35.0], [-107.03, 35.53], [-106.68, 35.68], [-106.53, 36.03], [-106.0, 36.25]]]]}, "2013-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.0, 36.25], [-105.75, 36.15], [-105.68, 36.18], [-105.65, 36.25], [-105.75, 36.5], [-105.53, 37.03], [-105.0, 37.25], [-104.75, 37.15], [-104.5, 37.25], [-104.25, 37.15], [-104.0, 37.25], [-103.75, 37.15], [-103.5, 37.25], [-102.97, 37.03], [-102.75, 36.5], [-102.85, 36.25], [-102.75, 36.0], [-102.97, 35.47], [-103.5, 35.25], [-103.75, 35.35], [-104.0, 35.25], [-104.25, 35.35], [-104.32, 35.32], [-104.46, 35.0], [-104.25, 34.5], [-104.47, 33.97], [-104.82, 33.82], [-104.96, 33.5], [-104.75, 33.0], [-104.85, 32.75], [-104.82, 32.68], [-104.47, 32.53], [-104.25, 32.0], [-104.47, 31.47], [-105.0, 31.25], [-105.25, 31.35], [-105.5, 31.25], [-105.75, 31.35], [-106.0, 31.25], [-106.53, 31.47], [-106.75, 32.0], [-106.65, 32.25], [-106.75, 32.5], [-106.62, 32.8], [-107.03, 32.97], [-107.25, 33.5], [-107.03, 34.03], [-106.5, 34.25], [-107.03, 34.47], [-107.25, 35.0], [-107.03, 35.53], [-106.68, 35.68], [-106.53, 36.03], [-106.0, 36.25]], [[-106.25, 34.15], [-106.18, 34.18], [-106.15, 34.25], [-106.18, 34.32], [-106.25, 34.35], [-106.5, 34.25], [-106.25, 34.15]]]]}, "2013-07-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.0, 36.25], [-105.75, 36.15], [-105.68, 36.18], [-105.65, 36.25], [-105.75, 36.5], [-105.53, 37.03], [-105.0, 37.25], [-104.75, 37.15], [-104.5, 37.25], [-104.25, 37.15], [-104.0, 37.25], [-103.75, 37.15], [-103.5, 37.25], [-102.97, 37.03], [-102.75, 36.5], [-102.85, 36.25], [-102.75, 36.0], [-102.97, 35.47], [-103.5, 35.25], [-103.75, 35.35], [-104.0, 35.25], [-104.25, 35.35], [-104.32, 35.32], [-104.46, 35.0], [-104.25, 34.5], [-104.47, 33.97], [-104.82, 33.82], [-104.96, 33.5], [-104.75, 33.0], [-104.85, 32.75], [-104.82, 32.68], [-104.47, 32.53], [-104.25, 32.0], [-104.47, 31.47], [-105.0, 31.25], [-105.25, 31.35], [-105.5, 31.25], [-105.75, 31.35], [-106.0, 31.25], [-106.53, 31.47], [-106.75, 32.0], [-106.65, 32.25], [-106.75, 32.5], [-106.62, 32.8], [-107.03, 32.97], [-107.25, 33.5], [-107.03, 34.03], [-106.5, 34.25], [-107.03, 34.47], [-107.25, 35.0], [-107.03, 35.53], [-106.68, 35.68], [-106.53, 36.03], [-106.0, 36.25]], [[-106.25, 34.15], [-106.18, 34.18], [-106.15, 34.25], [-106.18, 34.32], [-106.25, 34.35], [-106.5, 34.25], [-106.25, 34.15]]]]}, "2013-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.03, 32.97], [-107.25, 33.5], [-107.03, 34.03], [-106.5, 34.25], [-106.25, 34.15], [-106.0, 34.25], [-105.47, 34.03], [-105.25, 33.5], [-105.47, 32.97], [-106.0, 32.75], [-106.25, 32.85], [-106.5, 32.75], [-107.03, 32.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.476864607325979}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.367733668108401}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.71448878699124, 18.352976123381268, 19.195609478346682, 22.529644926888864]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.425551873940947, 13.252027845240889, 14.771853203531577, 21.52980400680252]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.309451526891952, -4.872282074907023, -4.009885476820203, -3.2042255982172776]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.0896765321035105, -6.476864607325979, -5.328499055815996, -3.447818418691895]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.560915365361042, -1.8476092797493717, -1.627528264996074, -1.343195609499804]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8644568835217694, -2.4740473102331753, -2.0827110154133432, -1.4229230618691353]}}