{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:59.233064", "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-Apr-02_to_2013-Apr-04_259.5_36.0"}, "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": 2013040000166}, "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": "April 02 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 04 2013"}, "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": 133173.98871517164}, "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": 36.0}, "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": 259.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "259.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 264.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.15, 34.75], [-102.25, 35.0], [-102.15, 35.25], [-102.25, 35.5], [-102.15, 35.75], [-102.25, 36.0], [-102.03, 36.53], [-101.68, 36.68], [-101.65, 36.75], [-101.75, 37.0], [-101.53, 37.53], [-101.0, 37.75], [-100.75, 37.65], [-100.5, 37.75], [-100.25, 37.65], [-100.0, 37.75], [-99.75, 37.65], [-99.5, 37.75], [-98.97, 37.53], [-98.82, 37.18], [-98.75, 37.15], [-98.5, 37.25], [-98.25, 37.15], [-98.0, 37.25], [-97.75, 37.15], [-97.5, 37.25], [-96.97, 37.03], [-96.82, 36.68], [-96.75, 36.65], [-96.5, 36.75], [-95.97, 36.53], [-95.82, 36.18], [-95.47, 36.03], [-95.25, 35.5], [-95.47, 34.97], [-95.82, 34.82], [-95.97, 34.47], [-96.5, 34.25], [-96.75, 34.35], [-97.0, 34.25], [-97.25, 34.35], [-97.5, 34.25], [-97.75, 34.35], [-98.0, 34.25], [-98.25, 34.35], [-98.5, 34.25], [-98.75, 34.35], [-98.82, 34.32], [-98.97, 33.97], [-99.5, 33.75], [-99.75, 33.85], [-100.0, 33.75], [-100.25, 33.85], [-100.32, 33.82], [-100.47, 33.47], [-101.0, 33.25], [-101.25, 33.35], [-101.5, 33.25], [-102.03, 33.47], [-102.25, 34.0], [-102.15, 34.25], [-102.25, 34.5], [-102.15, 34.75]]]]}, "2013-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.15, 34.75], [-102.25, 35.0], [-102.15, 35.25], [-102.25, 35.5], [-102.15, 35.75], [-102.25, 36.0], [-102.03, 36.53], [-101.68, 36.68], [-101.65, 36.75], [-101.75, 37.0], [-101.53, 37.53], [-101.0, 37.75], [-100.75, 37.65], [-100.5, 37.75], [-100.25, 37.65], [-100.0, 37.75], [-99.75, 37.65], [-99.5, 37.75], [-98.97, 37.53], [-98.82, 37.18], [-98.75, 37.15], [-98.5, 37.25], [-98.25, 37.15], [-98.0, 37.25], [-97.75, 37.15], [-97.5, 37.25], [-96.97, 37.03], [-96.82, 36.68], [-96.75, 36.65], [-96.5, 36.75], [-95.97, 36.53], [-95.82, 36.18], [-95.47, 36.03], [-95.25, 35.5], [-95.47, 34.97], [-95.82, 34.82], [-95.97, 34.47], [-96.5, 34.25], [-96.75, 34.35], [-97.0, 34.25], [-97.25, 34.35], [-97.5, 34.25], [-97.75, 34.35], [-98.0, 34.25], [-98.25, 34.35], [-98.5, 34.25], [-98.75, 34.35], [-98.82, 34.32], [-98.97, 33.97], [-99.5, 33.75], [-99.75, 33.85], [-100.0, 33.75], [-100.25, 33.85], [-100.32, 33.82], [-100.47, 33.47], [-101.0, 33.25], [-101.25, 33.35], [-101.5, 33.25], [-102.03, 33.47], [-102.25, 34.0], [-102.15, 34.25], [-102.25, 34.5], [-102.15, 34.75]]]]}, "2013-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-102.15, 34.75], [-102.25, 35.0], [-102.15, 35.25], [-102.25, 35.5], [-102.15, 35.75], [-102.25, 36.0], [-102.03, 36.53], [-101.68, 36.68], [-101.65, 36.75], [-101.75, 37.0], [-101.53, 37.53], [-101.0, 37.75], [-100.75, 37.65], [-100.5, 37.75], [-100.25, 37.65], [-100.0, 37.75], [-99.75, 37.65], [-99.5, 37.75], [-98.97, 37.53], [-98.82, 37.18], [-98.75, 37.15], [-98.5, 37.25], [-98.25, 37.15], [-98.0, 37.25], [-97.75, 37.15], [-97.5, 37.25], [-96.97, 37.03], [-96.82, 36.68], [-96.75, 36.65], [-96.5, 36.75], [-95.97, 36.53], [-95.82, 36.18], [-95.47, 36.03], [-95.25, 35.5], [-95.47, 34.97], [-95.82, 34.82], [-95.97, 34.47], [-96.5, 34.25], [-96.75, 34.35], [-97.0, 34.25], [-97.25, 34.35], [-97.5, 34.25], [-97.75, 34.35], [-98.0, 34.25], [-98.25, 34.35], [-98.5, 34.25], [-98.75, 34.35], [-98.82, 34.32], [-98.97, 33.97], [-99.5, 33.75], [-99.75, 33.85], [-100.0, 33.75], [-100.25, 33.85], [-100.32, 33.82], [-100.47, 33.47], [-101.0, 33.25], [-101.25, 33.35], [-101.5, 33.25], [-102.03, 33.47], [-102.25, 34.0], [-102.15, 34.25], [-102.25, 34.5], [-102.15, 34.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.591914591390491}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.177431863262335}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.368586466145587, 2.8809806716001845, 5.251978877867089]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.9376107710596102, 1.063288542752673, 3.7430604929541573]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.77974792506502, -10.494008885010278, -8.258538779711703]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.653325875139728, -11.591914591390491, -10.032752749244253]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8522767008083556, -2.149236552282614, -1.653635674060223]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.224902590294766, -2.4102815424280752, -2.0161680989336963]}}