{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:23:10.955603", "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": "2021-Feb-05_to_2021-Feb-09_83.0_71.0"}, "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": 2021020000276}, "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": "February 05 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 09 2021"}, "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": 132339.5608933553}, "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": ["Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Arctic"]}, "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": ["Kara Sea"]}, "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": 71.0}, "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": 83.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "83.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 72.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 85.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 68.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 73.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-02-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 70.53], [73.82, 70.68], [73.97, 71.03], [74.5, 71.25], [74.75, 71.15], [75.0, 71.25], [75.25, 71.15], [75.5, 71.25], [76.03, 71.03], [76.18, 70.68], [76.25, 70.65], [76.5, 70.75], [76.75, 70.65], [76.82, 70.68], [76.97, 71.03], [77.5, 71.25], [78.0, 71.04], [78.5, 71.25], [78.75, 71.15], [79.0, 71.25], [79.5, 71.04], [80.0, 71.25], [80.53, 71.03], [80.68, 70.68], [80.75, 70.65], [81.0, 70.75], [81.25, 70.65], [81.5, 70.75], [81.75, 70.65], [82.0, 70.75], [82.25, 70.65], [82.32, 70.68], [82.35, 70.75], [82.25, 71.0], [82.47, 71.53], [83.0, 71.75], [83.53, 71.53], [83.75, 71.0], [83.65, 70.75], [83.68, 70.68], [83.75, 70.65], [84.0, 70.75], [84.53, 70.53], [84.68, 70.18], [84.75, 70.15], [85.0, 70.25], [85.25, 70.15], [85.5, 70.25], [86.03, 70.03], [86.25, 69.5], [86.15, 69.25], [86.25, 69.0], [86.03, 68.47], [85.68, 68.32], [85.53, 67.97], [85.0, 67.75], [84.75, 67.85], [84.5, 67.75], [84.25, 67.85], [84.0, 67.75], [83.75, 67.85], [83.5, 67.75], [83.25, 67.85], [83.0, 67.75], [82.75, 67.85], [82.5, 67.75], [82.25, 67.85], [82.0, 67.75], [81.47, 67.97], [81.32, 68.32], [81.25, 68.35], [81.0, 68.25], [80.75, 68.35], [80.5, 68.25], [80.25, 68.35], [80.0, 68.25], [79.75, 68.35], [79.5, 68.25], [79.25, 68.35], [79.0, 68.25], [78.75, 68.35], [78.5, 68.25], [78.25, 68.35], [78.0, 68.25], [77.75, 68.35], [77.5, 68.25], [77.25, 68.35], [77.0, 68.25], [76.75, 68.35], [76.5, 68.25], [76.25, 68.35], [76.0, 68.25], [75.47, 68.47], [75.32, 68.82], [75.25, 68.85], [75.0, 68.75], [74.75, 68.85], [74.5, 68.75], [74.25, 68.85], [74.0, 68.75], [73.47, 68.97], [73.25, 69.5], [73.35, 69.75], [73.25, 70.0], [73.47, 70.53]]]]}, "2021-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.35, 70.75], [72.25, 71.0], [72.47, 71.53], [73.0, 71.75], [73.25, 71.65], [73.5, 71.75], [73.75, 71.65], [74.0, 71.75], [74.53, 71.53], [74.68, 71.18], [74.75, 71.15], [74.88, 71.2], [74.75, 71.5], [74.97, 72.03], [75.32, 72.18], [75.35, 72.25], [75.25, 72.5], [75.47, 73.03], [75.82, 73.18], [75.97, 73.53], [76.5, 73.75], [76.75, 73.65], [77.0, 73.75], [77.25, 73.65], [77.5, 73.75], [77.75, 73.65], [78.0, 73.75], [78.25, 73.65], [78.5, 73.75], [78.75, 73.65], [79.0, 73.75], [79.25, 73.65], [79.5, 73.75], [79.75, 73.65], [80.0, 73.75], [80.25, 73.65], [80.5, 73.75], [80.75, 73.65], [81.0, 73.75], [81.25, 73.65], [81.5, 73.75], [81.75, 73.65], [82.0, 73.75], [82.25, 73.65], [82.5, 73.75], [82.75, 73.65], [83.0, 73.75], [83.53, 73.53], [83.75, 73.0], [83.53, 72.47], [83.0, 72.25], [83.25, 72.15], [83.5, 72.25], [84.03, 72.03], [84.25, 71.5], [84.15, 71.25], [84.25, 71.0], [84.13, 70.7], [84.53, 70.53], [84.68, 70.18], [84.75, 70.15], [85.0, 70.25], [85.25, 70.15], [85.5, 70.25], [86.03, 70.03], [86.25, 69.5], [86.15, 69.25], [86.25, 69.0], [86.03, 68.47], [85.68, 68.32], [85.53, 67.97], [85.0, 67.75], [84.75, 67.85], [84.5, 67.75], [84.25, 67.85], [84.0, 67.75], [83.75, 67.85], [83.5, 67.75], [83.25, 67.85], [83.0, 67.75], [82.75, 67.85], [82.5, 67.75], [82.25, 67.85], [82.0, 67.75], [81.47, 67.97], [81.32, 68.32], [81.25, 68.35], [81.0, 68.25], [80.75, 68.35], [80.5, 68.25], [80.25, 68.35], [80.0, 68.25], [79.75, 68.35], [79.5, 68.25], [79.25, 68.35], [79.0, 68.25], [78.75, 68.35], [78.5, 68.25], [78.25, 68.35], [78.0, 68.25], [77.75, 68.35], [77.5, 68.25], [77.25, 68.35], [77.0, 68.25], [76.75, 68.35], [76.5, 68.25], [76.25, 68.35], [76.0, 68.25], [75.47, 68.47], [75.32, 68.82], [75.25, 68.85], [75.0, 68.75], [74.75, 68.85], [74.5, 68.75], [74.25, 68.85], [74.0, 68.75], [73.47, 68.97], [73.32, 69.32], [73.25, 69.35], [73.0, 69.25], [72.47, 69.47], [72.25, 70.0], [72.35, 70.25], [72.25, 70.5], [72.35, 70.75]], [[82.75, 72.35], [82.63, 72.3], [82.68, 72.18], [82.75, 72.15], [83.0, 72.25], [82.75, 72.35]], [[76.75, 70.85], [76.5, 70.75], [76.75, 70.65], [76.82, 70.68], [76.88, 70.8], [76.75, 70.85]], [[76.25, 70.85], [76.13, 70.8], [76.18, 70.68], [76.25, 70.65], [76.5, 70.75], [76.25, 70.85]], [[78.5, 71.25], [78.75, 71.15], [79.0, 71.25], [79.5, 71.04], [80.0, 71.25], [80.53, 71.03], [80.68, 70.68], [80.75, 70.65], [81.0, 70.75], [81.25, 70.65], [81.5, 70.75], [81.75, 70.65], [81.88, 70.7], [81.75, 71.0], [81.85, 71.25], [81.82, 71.32], [81.75, 71.35], [81.5, 71.25], [81.25, 71.35], [81.0, 71.25], [80.47, 71.47], [80.32, 71.82], [80.25, 71.85], [80.0, 71.75], [79.75, 71.85], [79.5, 71.75], [78.97, 71.97], [78.82, 72.32], [78.75, 72.35], [78.5, 72.25], [78.25, 72.35], [78.18, 72.32], [78.15, 72.25], [78.25, 72.0], [78.03, 71.47], [77.68, 71.32], [77.63, 71.2], [78.0, 71.04], [78.5, 71.25]]]]}, "2021-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.35, 70.75], [72.25, 71.0], [72.47, 71.53], [73.0, 71.75], [73.25, 71.65], [73.5, 71.75], [73.75, 71.65], [74.0, 71.75], [74.53, 71.53], [74.68, 71.18], [74.75, 71.15], [74.88, 71.2], [74.75, 71.5], [74.97, 72.03], [75.32, 72.18], [75.35, 72.25], [75.25, 72.5], [75.47, 73.03], [75.82, 73.18], [75.97, 73.53], [76.5, 73.75], [76.75, 73.65], [77.0, 73.75], [77.25, 73.65], [77.5, 73.75], [77.75, 73.65], [78.0, 73.75], [78.25, 73.65], [78.5, 73.75], [78.75, 73.65], [79.0, 73.75], [79.25, 73.65], [79.5, 73.75], [79.75, 73.65], [80.0, 73.75], [80.25, 73.65], [80.5, 73.75], [80.75, 73.65], [81.0, 73.75], [81.25, 73.65], [81.5, 73.75], [81.75, 73.65], [82.0, 73.75], [82.25, 73.65], [82.5, 73.75], [82.75, 73.65], [83.0, 73.75], [83.53, 73.53], [83.75, 73.0], [83.53, 72.47], [83.0, 72.25], [83.25, 72.15], [83.5, 72.25], [84.03, 72.03], [84.25, 71.5], [84.15, 71.25], [84.25, 71.0], [84.13, 70.7], [84.53, 70.53], [84.68, 70.18], [84.75, 70.15], [85.0, 70.25], [85.25, 70.15], [85.5, 70.25], [86.03, 70.03], [86.25, 69.5], [86.15, 69.25], [86.25, 69.0], [86.03, 68.47], [85.68, 68.32], [85.53, 67.97], [85.0, 67.75], [84.75, 67.85], [84.5, 67.75], [84.25, 67.85], [84.0, 67.75], [83.75, 67.85], [83.5, 67.75], [83.25, 67.85], [83.0, 67.75], [82.75, 67.85], [82.5, 67.75], [82.25, 67.85], [82.0, 67.75], [81.47, 67.97], [81.32, 68.32], [81.25, 68.35], [81.0, 68.25], [80.75, 68.35], [80.5, 68.25], [80.25, 68.35], [80.0, 68.25], [79.75, 68.35], [79.5, 68.25], [79.25, 68.35], [79.0, 68.25], [78.75, 68.35], [78.5, 68.25], [78.25, 68.35], [78.0, 68.25], [77.75, 68.35], [77.5, 68.25], [77.25, 68.35], [77.0, 68.25], [76.75, 68.35], [76.5, 68.25], [76.25, 68.35], [76.0, 68.25], [75.47, 68.47], [75.32, 68.82], [75.25, 68.85], [75.0, 68.75], [74.75, 68.85], [74.5, 68.75], [74.25, 68.85], [74.0, 68.75], [73.47, 68.97], [73.32, 69.32], [73.25, 69.35], [73.0, 69.25], [72.47, 69.47], [72.25, 70.0], [72.35, 70.25], [72.25, 70.5], [72.35, 70.75]], [[82.75, 72.35], [82.63, 72.3], [82.68, 72.18], [82.75, 72.15], [83.0, 72.25], [82.75, 72.35]], [[76.75, 70.85], [76.5, 70.75], [76.75, 70.65], [76.82, 70.68], [76.88, 70.8], [76.75, 70.85]], [[76.25, 70.85], [76.13, 70.8], [76.18, 70.68], [76.25, 70.65], [76.5, 70.75], [76.25, 70.85]], [[78.5, 71.25], [78.75, 71.15], [79.0, 71.25], [79.5, 71.04], [80.0, 71.25], [80.53, 71.03], [80.68, 70.68], [80.75, 70.65], [81.0, 70.75], [81.25, 70.65], [81.5, 70.75], [81.75, 70.65], [81.88, 70.7], [81.75, 71.0], [81.85, 71.25], [81.82, 71.32], [81.75, 71.35], [81.5, 71.25], [81.25, 71.35], [81.0, 71.25], [80.47, 71.47], [80.32, 71.82], [80.25, 71.85], [80.0, 71.75], [79.75, 71.85], [79.5, 71.75], [78.97, 71.97], [78.82, 72.32], [78.75, 72.35], [78.5, 72.25], [78.25, 72.35], [78.18, 72.32], [78.15, 72.25], [78.25, 72.0], [78.03, 71.47], [77.68, 71.32], [77.63, 71.2], [78.0, 71.04], [78.5, 71.25]]]]}, "2021-02-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.25, 71.0], [72.47, 71.53], [73.0, 71.75], [73.25, 71.65], [73.5, 71.75], [73.75, 71.65], [74.0, 71.75], [74.53, 71.53], [74.75, 71.0], [74.65, 70.75], [74.75, 70.5], [74.53, 69.97], [74.18, 69.82], [74.03, 69.47], [73.5, 69.25], [73.25, 69.35], [73.0, 69.25], [72.47, 69.47], [72.25, 70.0], [72.35, 70.25], [72.25, 70.5], [72.35, 70.75], [72.25, 71.0]]], [[[75.47, 73.03], [75.82, 73.18], [75.97, 73.53], [76.5, 73.75], [76.75, 73.65], [77.0, 73.75], [77.25, 73.65], [77.5, 73.75], [77.75, 73.65], [78.0, 73.75], [78.25, 73.65], [78.5, 73.75], [78.75, 73.65], [79.0, 73.75], [79.25, 73.65], [79.5, 73.75], [79.75, 73.65], [80.0, 73.75], [80.25, 73.65], [80.5, 73.75], [80.75, 73.65], [81.0, 73.75], [81.25, 73.65], [81.5, 73.75], [81.75, 73.65], [82.0, 73.75], [82.25, 73.65], [82.5, 73.75], [82.75, 73.65], [83.0, 73.75], [83.53, 73.53], [83.75, 73.0], [83.53, 72.47], [83.0, 72.25], [83.25, 72.15], [83.5, 72.25], [84.03, 72.03], [84.25, 71.5], [84.15, 71.25], [84.25, 71.0], [84.03, 70.47], [83.68, 70.32], [83.53, 69.97], [83.0, 69.75], [82.47, 69.97], [82.32, 70.32], [81.97, 70.47], [81.75, 71.0], [81.85, 71.25], [81.82, 71.32], [81.75, 71.35], [81.5, 71.25], [81.25, 71.35], [81.0, 71.25], [80.47, 71.47], [80.32, 71.82], [80.25, 71.85], [80.0, 71.75], [79.75, 71.85], [79.5, 71.75], [78.97, 71.97], [78.82, 72.32], [78.75, 72.35], [78.5, 72.25], [78.25, 72.35], [78.18, 72.32], [78.15, 72.25], [78.25, 72.0], [78.03, 71.47], [77.68, 71.32], [77.53, 70.97], [77.0, 70.75], [76.75, 70.85], [76.5, 70.75], [76.25, 70.85], [76.0, 70.75], [75.75, 70.85], [75.5, 70.75], [74.97, 70.97], [74.75, 71.5], [74.97, 72.03], [75.32, 72.18], [75.35, 72.25], [75.25, 72.5], [75.47, 73.03]], [[82.75, 72.35], [82.63, 72.3], [82.68, 72.18], [82.75, 72.15], [83.0, 72.25], [82.75, 72.35]]]]}, "2021-02-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.47, 73.53], [80.0, 73.75], [80.25, 73.65], [80.5, 73.75], [80.75, 73.65], [81.0, 73.75], [81.25, 73.65], [81.5, 73.75], [81.75, 73.65], [82.0, 73.75], [82.25, 73.65], [82.5, 73.75], [83.03, 73.53], [83.25, 73.0], [83.03, 72.47], [82.5, 72.25], [82.25, 72.35], [82.0, 72.25], [81.75, 72.35], [81.5, 72.25], [81.25, 72.35], [81.18, 72.32], [81.03, 71.97], [80.5, 71.75], [80.25, 71.85], [80.0, 71.75], [79.47, 71.97], [79.25, 72.5], [79.35, 72.75], [79.25, 73.0], [79.47, 73.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -21.593336406527555}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -14.986356253463912}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-41.20244420710776, -40.28026554511726, -39.38202329850006, -34.996332336917675, -35.5053050709904]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-44.5262281618856, -46.57196905106332, -43.45109523337217, -39.04730028869207, -37.90775235457889]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-15.90863886521832, -15.821629105198442, -14.9324634586226, -12.012939209093897, -11.358343295925447]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-19.38176756256732, -21.593336406527555, -18.056587786898632, -13.423339384093339, -11.896313966904358]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6025258164496794, -1.6564495263930241, -1.5624874646899054, -1.410021399064373, -1.3642912385851875]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9675172557481382, -2.1183395112558103, -1.836746727015803, -1.5529086863247943, -1.399659152164668]}}