{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:27:36.032638", "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-Oct-14_to_2021-Oct-16_85.0_38.0"}, "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": 2021100000461}, "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": "October 14 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 16 2021"}, "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": 72568.10910745629}, "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": ["China"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.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": 38.0}, "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": 85.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "85.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 81.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 86.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-10-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.0, 40.25], [82.25, 40.15], [82.5, 40.25], [82.75, 40.15], [83.0, 40.25], [83.25, 40.15], [83.5, 40.25], [83.75, 40.15], [84.0, 40.25], [84.53, 40.03], [84.68, 39.68], [84.75, 39.65], [85.0, 39.75], [85.53, 39.53], [85.68, 39.18], [86.03, 39.03], [86.18, 38.68], [86.53, 38.53], [86.75, 38.0], [86.53, 37.47], [86.0, 37.25], [85.75, 37.35], [85.68, 37.32], [85.53, 36.97], [85.0, 36.75], [84.75, 36.85], [84.5, 36.75], [84.25, 36.85], [84.0, 36.75], [83.75, 36.85], [83.5, 36.75], [83.25, 36.85], [83.0, 36.75], [82.47, 36.97], [82.32, 37.32], [81.97, 37.47], [81.75, 38.0], [81.88, 38.3], [81.75, 38.35], [81.5, 38.25], [80.97, 38.47], [80.75, 39.0], [80.97, 39.53], [81.32, 39.68], [81.47, 40.03], [82.0, 40.25]]]]}, "2021-10-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.0, 40.25], [82.25, 40.15], [82.5, 40.25], [82.75, 40.15], [83.0, 40.25], [83.25, 40.15], [83.5, 40.25], [83.75, 40.15], [84.0, 40.25], [84.53, 40.03], [84.68, 39.68], [84.75, 39.65], [85.0, 39.75], [85.53, 39.53], [85.68, 39.18], [86.03, 39.03], [86.18, 38.68], [86.53, 38.53], [86.75, 38.0], [86.53, 37.47], [86.0, 37.25], [85.75, 37.35], [85.68, 37.32], [85.53, 36.97], [85.0, 36.75], [84.75, 36.85], [84.5, 36.75], [84.25, 36.85], [84.0, 36.75], [83.75, 36.85], [83.5, 36.75], [83.25, 36.85], [83.0, 36.75], [82.47, 36.97], [82.32, 37.32], [81.97, 37.47], [81.75, 38.0], [81.88, 38.3], [81.75, 38.35], [81.5, 38.25], [80.97, 38.47], [80.75, 39.0], [80.97, 39.53], [81.32, 39.68], [81.47, 40.03], [82.0, 40.25]]]]}, "2021-10-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.0, 40.25], [82.25, 40.15], [82.5, 40.25], [82.75, 40.15], [83.0, 40.25], [83.25, 40.15], [83.5, 40.25], [83.75, 40.15], [84.0, 40.25], [84.53, 40.03], [84.68, 39.68], [84.75, 39.65], [85.0, 39.75], [85.53, 39.53], [85.68, 39.18], [86.03, 39.03], [86.18, 38.68], [86.53, 38.53], [86.75, 38.0], [86.53, 37.47], [86.0, 37.25], [85.75, 37.35], [85.68, 37.32], [85.53, 36.97], [85.0, 36.75], [84.75, 36.85], [84.5, 36.75], [84.25, 36.85], [84.0, 36.75], [83.75, 36.85], [83.5, 36.75], [83.25, 36.85], [83.0, 36.75], [82.47, 36.97], [82.32, 37.32], [81.97, 37.47], [81.75, 38.0], [81.88, 38.3], [81.75, 38.35], [81.5, 38.25], [80.97, 38.47], [80.75, 39.0], [80.97, 39.53], [81.32, 39.68], [81.47, 40.03], [82.0, 40.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.4691583547963205}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.573753920496097}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.269867821352818, 7.300462245053268, 7.215023662863018]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.231120072543206, 6.005249402010293, 5.398758775662941]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.295786359814499, -4.8619240976384805, -4.563551304035311]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.4691583547963205, -5.374435883750209, -5.116951211947651]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5468080223803187, -1.7688338440141984, -1.7005370628923884]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9463039448143449, -1.9194546948688087, -1.9352722313288224]}}