{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:52.870704", "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-Feb-23_to_2011-Feb-25_197.5_73.0"}, "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": 2011020002400}, "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 23 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 25 2011"}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 79030.61761820491}, "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": ["Arctic-Ocean", "N.W.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": ["Arctic Ocean", "Chukchi 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": 73.0}, "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": 197.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "197.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 191.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 200.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 69.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 73.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-167.5, 73.75], [-167.25, 73.65], [-167.18, 73.68], [-167.03, 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[-165.5, 70.25], [-166.03, 70.47], [-166.18, 70.82], [-166.25, 70.85], [-166.5, 70.75], [-166.75, 70.85], [-167.0, 70.75], [-167.53, 70.97], [-167.75, 71.5], [-167.65, 71.75], [-167.68, 71.82], [-167.75, 71.85], [-168.0, 71.75], [-168.53, 71.97], [-168.75, 72.5], [-168.53, 73.03], [-168.18, 73.18], [-168.03, 73.53], [-167.5, 73.75]]]]}, "2011-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-167.5, 73.75], [-167.25, 73.65], [-167.18, 73.68], [-167.03, 74.03], [-166.5, 74.25], [-166.25, 74.15], [-166.0, 74.25], [-165.75, 74.15], [-165.5, 74.25], [-165.25, 74.15], [-165.0, 74.25], [-164.75, 74.15], [-164.5, 74.25], [-164.25, 74.15], [-164.0, 74.25], [-163.75, 74.15], [-163.5, 74.25], [-163.25, 74.15], [-163.0, 74.25], [-162.47, 74.03], [-162.32, 73.68], [-161.97, 73.53], [-161.82, 73.18], [-161.47, 73.03], [-161.32, 72.68], [-160.97, 72.53], [-160.75, 72.0], [-160.85, 71.75], [-160.82, 71.68], [-160.47, 71.53], [-160.32, 71.18], [-159.97, 71.03], [-159.82, 70.68], [-159.75, 70.65], [-159.5, 70.75], [-158.97, 70.53], [-158.75, 70.0], [-158.97, 69.47], [-159.5, 69.25], [-159.75, 69.35], [-160.0, 69.25], [-160.25, 69.35], [-160.5, 69.25], [-160.75, 69.35], [-161.0, 69.25], [-161.25, 69.35], [-161.5, 69.25], [-161.75, 69.35], [-162.0, 69.25], [-162.5, 69.46], [-163.0, 69.25], [-163.53, 69.47], [-163.68, 69.82], [-163.75, 69.85], [-164.0, 69.75], [-164.25, 69.85], [-164.5, 69.75], [-165.03, 69.97], [-165.18, 70.32], [-165.25, 70.35], [-165.5, 70.25], [-166.03, 70.47], [-166.18, 70.82], [-166.25, 70.85], [-166.5, 70.75], [-166.75, 70.85], [-167.0, 70.75], [-167.53, 70.97], [-167.75, 71.5], [-167.65, 71.75], [-167.68, 71.82], [-167.75, 71.85], [-168.0, 71.75], [-168.53, 71.97], [-168.75, 72.5], [-168.53, 73.03], [-168.18, 73.18], [-168.03, 73.53], [-167.5, 73.75]]]]}, "2011-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-167.5, 73.75], [-167.25, 73.65], [-167.18, 73.68], [-167.03, 74.03], [-166.5, 74.25], [-166.25, 74.15], 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70.82], [-166.25, 70.85], [-166.5, 70.75], [-166.75, 70.85], [-167.0, 70.75], [-167.53, 70.97], [-167.75, 71.5], [-167.65, 71.75], [-167.68, 71.82], [-167.75, 71.85], [-168.0, 71.75], [-168.53, 71.97], [-168.75, 72.5], [-168.53, 73.03], [-168.18, 73.18], [-168.03, 73.53], [-167.5, 73.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 20.588066881352148}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 11.148065590777142}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-11.570439912831603, -10.361864409627515, -11.371932264420707]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.32161994112613, -4.562297473459296, -8.879599067507854]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [10.598236795864743, 11.941675470205737, 10.90428450626093]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [15.285607398676177, 20.588066881352148, 15.716411465068035]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.743960153222513, 2.0028879698662547, 1.8207815166622014]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.00603654990847, 2.360116989672497, 2.2533738865362314]}}