{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:36.839322", "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-Sep-01_to_2021-Sep-03_198.0_63.0"}, "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": 2021090001298}, "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": "September 01 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 03 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": "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": 88085.42391883892}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": []}, "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": 63.0}, "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": 198.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "198.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 195.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 201.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 60.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 65.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-165.75, 60.5], [-165.53, 61.03], [-165.0, 61.25], [-164.75, 61.15], [-164.5, 61.25], [-164.25, 61.15], [-164.18, 61.18], [-164.03, 61.53], [-163.68, 61.68], [-163.54, 62.0], [-163.75, 62.5], [-163.53, 63.03], [-163.18, 63.18], [-163.03, 63.53], [-162.5, 63.75], [-162.25, 63.65], [-162.0, 63.75], [-161.75, 63.65], [-161.68, 63.68], [-161.53, 64.03], [-161.18, 64.18], [-161.15, 64.25], [-161.25, 64.5], [-161.15, 64.75], [-161.25, 65.0], [-161.03, 65.53], [-160.68, 65.68], [-160.53, 66.03], [-160.0, 66.25], [-159.75, 66.15], [-159.5, 66.25], [-158.97, 66.03], [-158.82, 65.68], [-158.47, 65.53], [-158.25, 65.0], [-158.47, 64.47], [-159.0, 64.25], [-159.25, 64.35], [-159.32, 64.32], [-159.46, 64.0], [-159.32, 63.68], [-158.97, 63.53], [-158.82, 63.18], [-158.47, 63.03], [-158.25, 62.5], [-158.35, 62.25], [-158.25, 62.0], [-158.35, 61.75], [-158.25, 61.5], [-158.47, 60.97], [-159.0, 60.75], [-159.25, 60.85], [-159.37, 60.8], [-159.25, 60.5], [-159.47, 59.97], [-159.82, 59.82], [-159.97, 59.47], [-160.5, 59.25], [-160.75, 59.35], [-161.0, 59.25], [-161.25, 59.35], [-161.5, 59.25], [-162.03, 59.47], [-162.18, 59.82], [-162.25, 59.85], [-162.5, 59.75], [-162.75, 59.85], [-162.82, 59.82], [-162.97, 59.47], [-163.5, 59.25], [-163.75, 59.35], [-164.0, 59.25], [-164.53, 59.47], [-164.68, 59.82], [-164.75, 59.85], [-165.0, 59.75], [-165.53, 59.97], [-165.75, 60.5]], [[-161.5, 61.46], [-161.82, 61.32], [-161.85, 61.25], [-161.82, 61.18], [-161.75, 61.15], [-161.5, 61.25], [-161.25, 61.15], [-161.18, 61.18], [-161.15, 61.25], [-161.18, 61.32], [-161.5, 61.46]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-165.0, 59.75], [-165.53, 59.97], [-165.75, 60.5], [-165.53, 61.03], [-165.0, 61.25], [-164.75, 61.15], [-164.5, 61.25], [-164.25, 61.15], [-164.18, 61.18], [-164.03, 61.53], [-163.68, 61.68], [-163.54, 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[-161.18, 61.18], [-161.15, 61.25]]]]}, "2021-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-165.0, 59.75], [-165.53, 59.97], [-165.75, 60.5], [-165.53, 61.03], [-165.0, 61.25], [-164.75, 61.15], [-164.5, 61.25], [-164.25, 61.15], [-164.18, 61.18], [-164.03, 61.53], [-163.68, 61.68], [-163.54, 62.0], [-163.75, 62.5], [-163.53, 63.03], [-163.18, 63.18], [-163.03, 63.53], [-162.5, 63.75], [-162.25, 63.65], [-162.0, 63.75], [-161.75, 63.65], [-161.68, 63.68], [-161.53, 64.03], [-161.18, 64.18], [-161.15, 64.25], [-161.25, 64.5], [-161.15, 64.75], [-161.25, 65.0], [-161.03, 65.53], [-160.68, 65.68], [-160.53, 66.03], [-160.0, 66.25], [-159.75, 66.15], [-159.5, 66.25], [-158.97, 66.03], [-158.82, 65.68], [-158.47, 65.53], [-158.25, 65.0], [-158.47, 64.47], [-159.0, 64.25], [-159.25, 64.35], [-159.32, 64.32], [-159.46, 64.0], [-159.32, 63.68], [-158.97, 63.53], [-158.82, 63.18], [-158.47, 63.03], [-158.25, 62.5], [-158.35, 62.25], [-158.25, 62.0], [-158.35, 61.75], 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"Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.167508446840543, 12.956267743786213, 12.538537014439726]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.262088600666175, 14.355279556771336, 13.59636237986416]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.7991858013571576, 3.6726409900473524, 3.341874260383778]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.6872930362519583, 5.340750181104966, 4.679974980989414]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4076988447401289, 1.850732045311744, 1.7141637647413304]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6125265412265497, 2.436991625010982, 2.1900947036941663]}}