{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:32.562942", "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-Jan-17_to_2011-Jan-25_48.0_37.0"}, "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": 2011010000884}, "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 17 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 25 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 112026.64844210286}, "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": 37.0}, "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": 48.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "48.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 45.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 50.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.47, 38.03], [46.0, 38.25], [46.5, 38.04], [47.0, 38.25], [47.25, 38.15], [47.5, 38.25], [48.03, 38.03], [48.18, 37.68], [48.53, 37.53], [48.75, 37.0], [48.53, 36.47], [48.0, 36.25], [47.47, 36.47], [47.32, 36.82], [47.25, 36.85], [47.18, 36.82], [47.03, 36.47], [46.5, 36.25], [46.25, 36.35], [46.0, 36.25], [45.47, 36.47], [45.25, 37.0], [45.35, 37.25], [45.25, 37.5], [45.47, 38.03]]]]}, "2011-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, 37.53], [45.32, 37.68], [45.47, 38.03], [46.0, 38.25], [46.5, 38.04], [47.0, 38.25], [47.25, 38.15], [47.5, 38.25], [47.75, 38.15], [48.0, 38.25], [48.25, 38.15], [48.5, 38.25], [49.03, 38.03], [49.18, 37.68], [49.53, 37.53], [49.75, 37.0], [49.65, 36.75], [49.68, 36.68], [49.75, 36.65], [50.0, 36.75], [50.25, 36.65], [50.5, 36.75], [51.03, 36.53], [51.25, 36.0], [51.03, 35.47], [50.5, 35.25], [50.25, 35.35], [50.0, 35.25], [49.75, 35.35], [49.5, 35.25], [49.0, 35.46], [48.5, 35.25], [48.25, 35.35], [48.18, 35.32], [48.15, 35.25], [48.25, 35.0], [48.03, 34.47], [47.5, 34.25], [47.2, 34.38], [47.03, 33.97], [46.5, 33.75], [45.97, 33.97], [45.75, 34.5], [45.85, 34.75], [45.75, 35.0], [45.96, 35.5], [45.82, 35.82], [45.75, 35.85], [45.5, 35.75], [44.97, 35.97], [44.75, 36.5], [44.85, 36.75], [44.75, 37.0], [44.97, 37.53]]]]}, "2011-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, 37.53], [45.32, 37.68], [45.47, 38.03], [46.0, 38.25], [46.25, 38.15], [46.5, 38.25], [46.75, 38.15], [47.0, 38.25], [47.25, 38.15], [47.32, 38.18], [47.47, 38.53], [48.0, 38.75], [48.25, 38.65], [48.5, 38.75], [49.03, 38.53], [49.25, 38.0], [49.15, 37.75], [49.18, 37.68], [49.53, 37.53], [49.75, 37.0], [49.65, 36.75], [49.68, 36.68], [49.75, 36.65], [50.0, 36.75], [50.25, 36.65], [50.5, 36.75], [51.03, 36.53], [51.25, 36.0], [51.03, 35.47], [50.5, 35.25], [50.25, 35.35], [50.0, 35.25], [49.75, 35.35], [49.5, 35.25], [49.25, 35.35], [49.18, 35.32], [49.03, 34.97], [48.68, 34.82], [48.53, 34.47], [48.0, 34.25], [47.75, 34.35], [47.5, 34.25], [47.25, 34.35], [47.18, 34.32], [47.03, 33.97], [46.5, 33.75], [45.97, 33.97], [45.75, 34.5], [45.85, 34.75], [45.75, 35.0], [45.85, 35.25], [45.82, 35.32], [45.47, 35.47], [45.32, 35.82], [44.97, 35.97], [44.75, 36.5], [44.85, 36.75], [44.75, 37.0], [44.97, 37.53]]]]}, "2011-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, 37.53], [45.32, 37.68], [45.47, 38.03], [46.0, 38.25], [46.25, 38.15], [46.5, 38.25], [46.75, 38.15], [47.0, 38.25], [47.25, 38.15], [47.32, 38.18], [47.47, 38.53], [48.0, 38.75], [48.25, 38.65], [48.5, 38.75], [49.03, 38.53], [49.25, 38.0], [49.15, 37.75], [49.18, 37.68], [49.53, 37.53], [49.75, 37.0], [49.65, 36.75], [49.68, 36.68], [49.75, 36.65], [50.0, 36.75], [50.25, 36.65], [50.5, 36.75], [51.03, 36.53], [51.25, 36.0], [51.03, 35.47], [50.5, 35.25], [50.25, 35.35], [50.0, 35.25], [49.75, 35.35], [49.5, 35.25], [49.25, 35.35], [49.18, 35.32], [49.03, 34.97], [48.68, 34.82], [48.53, 34.47], [48.0, 34.25], [47.75, 34.35], [47.5, 34.25], [47.25, 34.35], [47.18, 34.32], [47.03, 33.97], [46.5, 33.75], [45.97, 33.97], [45.75, 34.5], [45.85, 34.75], [45.75, 35.0], [45.85, 35.25], [45.82, 35.32], [45.47, 35.47], [45.32, 35.82], [44.97, 35.97], [44.75, 36.5], [44.85, 36.75], [44.75, 37.0], [44.97, 37.53]]]]}, "2011-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, 37.53], [45.32, 37.68], [45.47, 38.03], [46.0, 38.25], [46.25, 38.15], [46.5, 38.25], [46.75, 38.15], [47.0, 38.25], [47.25, 38.15], [47.32, 38.18], [47.47, 38.53], [48.0, 38.75], [48.25, 38.65], [48.5, 38.75], [49.03, 38.53], [49.25, 38.0], [49.15, 37.75], [49.18, 37.68], [49.53, 37.53], [49.75, 37.0], [49.65, 36.75], [49.68, 36.68], [49.75, 36.65], [50.0, 36.75], [50.25, 36.65], [50.5, 36.75], [51.03, 36.53], [51.25, 36.0], [51.03, 35.47], [50.5, 35.25], [50.25, 35.35], [50.0, 35.25], [49.75, 35.35], [49.5, 35.25], [49.25, 35.35], [49.18, 35.32], [49.03, 34.97], [48.68, 34.82], [48.53, 34.47], [48.0, 34.25], [47.75, 34.35], [47.5, 34.25], [47.25, 34.35], [47.18, 34.32], [47.03, 33.97], [46.5, 33.75], [45.97, 33.97], [45.82, 34.32], [45.47, 34.47], [45.25, 35.0], [45.46, 35.5], [45.32, 35.82], [44.97, 35.97], [44.75, 36.5], [44.85, 36.75], [44.75, 37.0], [44.97, 37.53]]]]}, "2011-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, 37.53], [45.32, 37.68], [45.47, 38.03], [46.0, 38.25], [46.25, 38.15], [46.5, 38.25], [46.75, 38.15], [47.0, 38.25], [47.25, 38.15], [47.32, 38.18], [47.47, 38.53], [48.0, 38.75], [48.25, 38.65], [48.5, 38.75], [49.03, 38.53], [49.25, 38.0], [49.15, 37.75], [49.18, 37.68], [49.53, 37.53], [49.68, 37.18], [50.03, 37.03], [50.18, 36.68], [50.25, 36.65], [50.5, 36.75], [51.03, 36.53], [51.25, 36.0], [51.03, 35.47], [50.5, 35.25], [50.25, 35.35], [50.0, 35.25], [49.75, 35.35], [49.5, 35.25], [49.25, 35.35], [49.18, 35.32], [49.03, 34.97], [48.68, 34.82], [48.53, 34.47], [48.0, 34.25], [47.75, 34.35], [47.5, 34.25], [47.25, 34.35], [47.18, 34.32], [47.03, 33.97], [46.5, 33.75], [45.97, 33.97], [45.82, 34.32], [45.47, 34.47], [45.25, 35.0], [45.46, 35.5], [45.32, 35.82], [44.97, 35.97], [44.75, 36.5], [44.85, 36.75], [44.75, 37.0], [44.97, 37.53]]]]}, "2011-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, 37.53], [45.5, 37.75], [45.75, 37.65], [46.0, 37.75], [46.25, 37.65], [46.32, 37.68], [46.47, 38.03], [47.0, 38.25], [47.25, 38.15], [47.5, 38.25], [47.75, 38.15], [48.0, 38.25], [48.25, 38.15], [48.5, 38.25], [49.03, 38.03], [49.18, 37.68], [49.53, 37.53], [49.68, 37.18], [50.03, 37.03], [50.18, 36.68], [50.53, 36.53], [50.75, 36.0], [50.53, 35.47], [50.0, 35.25], [49.75, 35.35], [49.5, 35.25], [49.25, 35.35], [49.18, 35.32], [49.03, 34.97], [48.68, 34.82], [48.53, 34.47], [48.0, 34.25], [47.75, 34.35], [47.5, 34.25], [47.25, 34.35], [47.0, 34.25], [46.75, 34.35], [46.5, 34.25], [46.25, 34.35], [46.0, 34.25], [45.47, 34.47], [45.25, 35.0], [45.47, 35.53], [45.82, 35.68], [45.85, 35.75], [45.82, 35.82], [45.75, 35.85], [45.5, 35.75], [44.97, 35.97], [44.75, 36.5], [44.85, 36.75], [44.75, 37.0], [44.97, 37.53]]]]}, "2011-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.25, 36.5], [45.47, 37.03], [46.0, 37.25], [46.25, 37.15], [46.38, 37.2], [46.25, 37.5], [46.47, 38.03], [47.0, 38.25], [47.25, 38.15], [47.5, 38.25], [47.75, 38.15], [48.0, 38.25], [48.25, 38.15], [48.5, 38.25], [49.03, 38.03], [49.25, 37.5], [49.15, 37.25], [49.18, 37.18], [49.25, 37.15], [49.5, 37.25], [50.03, 37.03], [50.18, 36.68], [50.53, 36.53], [50.75, 36.0], [50.53, 35.47], [50.0, 35.25], [49.75, 35.35], [49.5, 35.25], [49.25, 35.35], [49.18, 35.32], [49.03, 34.97], [48.5, 34.75], [48.25, 34.85], [48.0, 34.75], [47.75, 34.85], [47.5, 34.75], [46.97, 34.97], [46.82, 35.32], [46.57, 35.43], [46.75, 35.0], [46.53, 34.47], [46.0, 34.25], [45.47, 34.47], [45.25, 35.0], [45.47, 35.53], [46.0, 35.75], [45.47, 35.97], [45.25, 36.5]], [[46.43, 35.57], [46.32, 35.82], [46.25, 35.85], [46.0, 35.75], [46.43, 35.57]]]]}, "2011-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.75, 37.5], [46.97, 38.03], [47.5, 38.25], [48.03, 38.03], [48.18, 37.68], [48.53, 37.53], [48.75, 37.0], [48.65, 36.75], [48.75, 36.5], [48.53, 35.97], [48.0, 35.75], [47.47, 35.97], [47.25, 36.5], [47.35, 36.75], [47.32, 36.82], [46.97, 36.97], [46.75, 37.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -18.37757509905333}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.358106528918697}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-9.419564030213508, -11.397594470343392, -12.995050559847186, -13.142422056233954, -12.589652404183937, -11.905746551593097, -11.81914293714209, -11.686836790702614, -9.14694274804475]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-12.387625987017543, -14.85454154897127, -20.28081766532253, -20.158182275155696, -21.224104069954024, -19.491981153406783, -19.565127317386555, -18.01838505992194, -9.611402761394686]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.388458993110068, -8.719748306829995, -9.841332378681104, -9.949412635235836, -9.671286554070228, -9.115668366256607, -9.188105681646334, -9.195931825111856, -6.931832786662369]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.797830730933185, -12.816617872122492, -17.304920079182835, -17.181110052315944, -18.37757509905333, -16.770192216182323, -16.973289366335564, -15.527958006169712, -7.340598461826858]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6984315922397082, -1.8248212732056102, -2.048319814869061, -2.143210679324224, -2.1478781528847057, -2.0510778337921067, -2.018230668085795, -1.9432701932625014, -1.4067708923197468]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.917952159855011, -2.7028452099096545, -3.395176239907215, -3.3100981363320243, -3.420113561912591, -3.214195227170152, -3.0344733382999687, -2.7297787124197472, -1.5067329520133927]}}