{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:26.168159", "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": "2017-Nov-23_to_2017-Nov-26_53.5_27.5"}, "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": 2017110000871}, "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 23 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 26 2017"}, "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": 51827.7025149381}, "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": ["Iran"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.Asia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": 27.5}, "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": 53.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "53.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 51.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 55.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[52.47, 29.03], [52.82, 29.18], [52.85, 29.25], [52.75, 29.5], [52.97, 30.03], [53.5, 30.25], [54.03, 30.03], [54.18, 29.68], [54.53, 29.53], [54.75, 29.0], [54.63, 28.7], [54.75, 28.65], [55.0, 28.75], [55.25, 28.65], [55.5, 28.75], [56.03, 28.53], [56.25, 28.0], [56.15, 27.75], [56.25, 27.5], [56.03, 26.97], [55.5, 26.75], [55.25, 26.85], [55.0, 26.75], [54.75, 26.85], [54.5, 26.75], [54.25, 26.85], [54.0, 26.75], [53.75, 26.85], [53.5, 26.75], [52.97, 26.97], [52.82, 27.32], [52.47, 27.47], [52.25, 28.0], [52.35, 28.25], [52.25, 28.5], [52.47, 29.03]]]]}, "2017-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[50.75, 28.5], [50.97, 29.03], [51.5, 29.25], [52.03, 29.03], [52.18, 28.68], [52.25, 28.65], [52.32, 28.68], [52.47, 29.03], [52.82, 29.18], [52.85, 29.25], [52.75, 29.5], [52.97, 30.03], [53.5, 30.25], [54.03, 30.03], [54.18, 29.68], [54.53, 29.53], [54.75, 29.0], [54.63, 28.7], [54.75, 28.65], [55.0, 28.75], [55.25, 28.65], [55.5, 28.75], [56.03, 28.53], [56.25, 28.0], [56.15, 27.75], [56.25, 27.5], [56.03, 26.97], [55.5, 26.75], [55.25, 26.85], [55.0, 26.75], [54.75, 26.85], [54.5, 26.75], [54.25, 26.85], [54.18, 26.82], [54.03, 26.47], [53.5, 26.25], [52.97, 26.47], [52.75, 27.0], [52.85, 27.25], [52.82, 27.32], [52.75, 27.35], [52.5, 27.25], [52.25, 27.35], [52.0, 27.25], [51.47, 27.47], [51.32, 27.82], [50.97, 27.97], [50.75, 28.5]]]]}, "2017-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[50.75, 28.5], [50.97, 29.03], [51.5, 29.25], [52.03, 29.03], [52.18, 28.68], [52.25, 28.65], [52.32, 28.68], [52.47, 29.03], [52.82, 29.18], [52.85, 29.25], [52.75, 29.5], [52.97, 30.03], [53.5, 30.25], [54.03, 30.03], [54.18, 29.68], [54.53, 29.53], [54.75, 29.0], [54.63, 28.7], [54.75, 28.65], [55.0, 28.75], [55.25, 28.65], [55.5, 28.75], [56.03, 28.53], [56.25, 28.0], [56.15, 27.75], [56.25, 27.5], [56.03, 26.97], [55.5, 26.75], [55.25, 26.85], [55.0, 26.75], [54.75, 26.85], [54.5, 26.75], [54.25, 26.85], [54.18, 26.82], [54.03, 26.47], [53.5, 26.25], [52.97, 26.47], [52.75, 27.0], [52.85, 27.25], [52.82, 27.32], [52.75, 27.35], [52.5, 27.25], [52.25, 27.35], [52.0, 27.25], [51.47, 27.47], [51.32, 27.82], [50.97, 27.97], [50.75, 28.5]]]]}, "2017-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[50.75, 28.5], [50.97, 29.03], [51.5, 29.25], [52.03, 29.03], [52.18, 28.68], [52.25, 28.65], [52.5, 28.75], [53.0, 28.54], [53.5, 28.75], [54.0, 28.54], [54.5, 28.75], [54.75, 28.65], [55.0, 28.75], [55.25, 28.65], [55.5, 28.75], [56.03, 28.53], [56.25, 28.0], [56.15, 27.75], [56.25, 27.5], [56.03, 26.97], [55.5, 26.75], [55.25, 26.85], [55.0, 26.75], [54.75, 26.85], [54.5, 26.75], [54.25, 26.85], [54.18, 26.82], [54.03, 26.47], [53.5, 26.25], [52.97, 26.47], [52.75, 27.0], [52.85, 27.25], [52.8, 27.38], [52.5, 27.25], [52.25, 27.35], [52.0, 27.25], [51.47, 27.47], [51.32, 27.82], [50.97, 27.97], [50.75, 28.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.796581861413529}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.2183285160149087}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.740605189795417, 13.165686882320585, 12.403590288445287, 14.331971402299018]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.735704605361548, 7.637620619515246, 7.300924100838017, 11.842687140616647]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.0297933233320276, -3.054787567530115, -3.671130704878058, -3.0131026947114057]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.55370720761141, -3.957044400622692, -4.796581861413529, -3.5944676520842904]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.561963761101636, -1.600301621977082, -1.9365103642940615, -1.6069277242087567]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.754415009380388, -1.9192976304688663, -2.4269005602125002, -2.032455845067973]}}