{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:23:02.893709", "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-Jan-14_to_2021-Jan-19_223.5_59.0"}, "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": 2021010001927}, "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 14 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 19 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 68566.805539818}, "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": ["Canada", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": ["Gulf of Alaska", "The Coastal Waters of Southeast Alaska and British Columbia"]}, "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": 59.0}, "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": 223.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "223.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 220.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 227.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-136.5, 59.75], [-135.97, 59.53], [-135.75, 59.0], [-135.97, 58.47], [-136.5, 58.25], [-137.03, 58.47], [-137.25, 59.0], [-137.03, 59.53], [-136.5, 59.75]]]]}, "2021-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-140.03, 59.47], [-140.25, 60.0], [-140.03, 60.53], [-139.5, 60.75], [-139.25, 60.65], [-139.0, 60.75], [-138.47, 60.53], [-138.25, 60.0], [-138.37, 59.7], [-138.0, 59.54], [-137.68, 59.68], [-137.53, 60.03], [-137.0, 60.25], [-136.75, 60.15], [-136.5, 60.25], [-136.25, 60.15], [-136.0, 60.25], [-135.75, 60.15], [-135.5, 60.25], [-135.25, 60.15], [-135.0, 60.25], [-134.75, 60.15], [-134.5, 60.25], [-133.97, 60.03], [-133.75, 59.5], [-133.85, 59.25], [-133.82, 59.18], [-133.75, 59.15], [-133.5, 59.25], [-132.97, 59.03], [-132.75, 58.5], [-132.97, 57.97], [-133.32, 57.82], [-133.35, 57.75], [-133.25, 57.5], [-133.47, 56.97], [-134.0, 56.75], [-134.25, 56.85], [-134.5, 56.75], [-134.75, 56.85], [-135.0, 56.75], [-135.25, 56.85], [-135.5, 56.75], [-136.03, 56.97], [-136.18, 57.32], [-136.53, 57.47], [-136.68, 57.82], [-136.75, 57.85], [-137.0, 57.75], [-137.25, 57.85], [-137.5, 57.75], [-138.03, 57.97], [-138.2, 58.38], [-138.5, 58.25], [-139.03, 58.47], [-139.25, 59.0], [-139.12, 59.3], [-139.25, 59.35], [-139.5, 59.25], [-140.03, 59.47]]]]}, "2021-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-140.15, 59.75], [-140.25, 60.0], [-140.03, 60.53], [-139.5, 60.75], [-139.25, 60.65], [-139.0, 60.75], [-138.75, 60.65], [-138.5, 60.75], [-137.97, 60.53], [-137.82, 60.18], [-137.75, 60.15], [-137.68, 60.18], [-137.53, 60.53], [-137.0, 60.75], [-136.47, 60.53], [-136.32, 60.18], [-136.25, 60.15], [-136.0, 60.25], [-135.75, 60.15], [-135.5, 60.25], [-135.25, 60.15], [-135.0, 60.25], [-134.75, 60.15], [-134.5, 60.25], [-133.97, 60.03], [-133.82, 59.68], [-133.47, 59.53], [-133.32, 59.18], [-133.25, 59.15], [-133.0, 59.25], [-132.47, 59.03], [-132.25, 58.5], [-132.47, 57.97], [-133.0, 57.75], [-133.25, 57.85], [-133.32, 57.82], [-133.35, 57.75], [-133.25, 57.5], [-133.47, 56.97], [-134.0, 56.75], [-134.25, 56.85], [-134.5, 56.75], [-134.75, 56.85], [-135.0, 56.75], [-135.25, 56.85], [-135.5, 56.75], [-136.03, 56.97], [-136.18, 57.32], [-136.53, 57.47], [-136.68, 57.82], [-136.75, 57.85], [-137.0, 57.75], [-137.25, 57.85], [-137.5, 57.75], [-138.03, 57.97], [-138.2, 58.38], [-138.5, 58.25], [-138.75, 58.35], [-139.0, 58.25], [-139.25, 58.35], [-139.5, 58.25], [-140.03, 58.47], [-140.25, 59.0], [-140.15, 59.25], [-140.25, 59.5], [-140.15, 59.75]]]]}, "2021-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-140.15, 59.75], [-140.25, 60.0], [-140.03, 60.53], [-139.5, 60.75], [-139.25, 60.65], [-139.0, 60.75], [-138.75, 60.65], [-138.5, 60.75], [-138.0, 60.54], [-137.5, 60.75], [-137.25, 60.65], [-137.0, 60.75], [-136.75, 60.65], [-136.5, 60.75], [-135.97, 60.53], [-135.82, 60.18], [-135.75, 60.15], [-135.5, 60.25], [-135.25, 60.15], [-135.0, 60.25], [-134.75, 60.15], [-134.5, 60.25], [-133.97, 60.03], [-133.82, 59.68], [-133.47, 59.53], [-133.32, 59.18], [-133.25, 59.15], [-133.0, 59.25], [-132.47, 59.03], [-132.25, 58.5], [-132.47, 57.97], [-133.0, 57.75], [-133.25, 57.85], [-133.32, 57.82], [-133.35, 57.75], [-133.25, 57.5], [-133.47, 56.97], [-134.0, 56.75], [-134.25, 56.85], [-134.5, 56.75], [-134.75, 56.85], [-135.0, 56.75], [-135.25, 56.85], [-135.5, 56.75], [-136.03, 56.97], [-136.18, 57.32], [-136.53, 57.47], [-136.68, 57.82], [-136.75, 57.85], [-137.0, 57.75], [-137.25, 57.85], [-137.5, 57.75], [-138.03, 57.97], [-138.2, 58.38], [-138.5, 58.25], [-138.75, 58.35], [-139.0, 58.25], [-139.25, 58.35], [-139.5, 58.25], [-140.03, 58.47], [-140.25, 59.0], [-140.15, 59.25], [-140.25, 59.5], [-140.15, 59.75]]]]}, "2021-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-140.15, 59.75], [-140.25, 60.0], [-140.03, 60.53], [-139.5, 60.75], [-139.25, 60.65], [-139.0, 60.75], [-138.75, 60.65], [-138.5, 60.75], [-138.0, 60.54], [-137.5, 60.75], [-137.25, 60.65], [-137.0, 60.75], [-136.75, 60.65], [-136.5, 60.75], [-135.97, 60.53], [-135.82, 60.18], [-135.75, 60.15], [-135.5, 60.25], [-135.25, 60.15], [-135.0, 60.25], [-134.75, 60.15], [-134.5, 60.25], [-133.97, 60.03], [-133.82, 59.68], [-133.47, 59.53], [-133.32, 59.18], [-133.25, 59.15], [-133.0, 59.25], [-132.47, 59.03], [-132.25, 58.5], [-132.47, 57.97], [-133.0, 57.75], [-133.25, 57.85], [-133.32, 57.82], [-133.35, 57.75], [-133.25, 57.5], [-133.47, 56.97], [-134.0, 56.75], [-134.25, 56.85], [-134.5, 56.75], [-134.75, 56.85], [-135.0, 56.75], [-135.25, 56.85], [-135.5, 56.75], [-136.03, 56.97], [-136.18, 57.32], [-136.53, 57.47], [-136.68, 57.82], [-137.03, 57.97], [-137.18, 58.32], [-137.53, 58.47], [-137.68, 58.82], [-137.75, 58.85], [-137.82, 58.82], [-137.97, 58.47], [-138.5, 58.25], [-138.75, 58.35], [-139.0, 58.25], [-139.25, 58.35], [-139.5, 58.25], [-140.03, 58.47], [-140.25, 59.0], [-140.15, 59.25], [-140.25, 59.5], [-140.15, 59.75]]]]}, "2021-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-135.25, 59.5], [-135.03, 60.03], [-134.5, 60.25], [-133.97, 60.03], [-133.75, 59.5], [-133.93, 59.07], [-133.5, 59.25], [-133.25, 59.15], [-133.0, 59.25], [-132.47, 59.03], [-132.25, 58.5], [-132.47, 57.97], [-133.0, 57.75], [-133.25, 57.85], [-133.5, 57.75], [-134.03, 57.97], [-134.25, 58.5], [-134.07, 58.93], [-134.5, 58.75], [-135.03, 58.97], [-135.25, 59.5]]], [[[-138.25, 60.0], [-138.03, 60.53], [-137.5, 60.75], [-137.25, 60.65], [-137.0, 60.75], [-136.75, 60.65], [-136.5, 60.75], [-135.97, 60.53], [-135.75, 60.0], [-135.97, 59.47], [-136.5, 59.25], [-136.75, 59.35], [-137.0, 59.25], [-137.25, 59.35], [-137.5, 59.25], [-138.03, 59.47], [-138.25, 60.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 11.93202755462022}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 7.836365967722148}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.1761853346243356, 1.2063740895666228, 0.7909124426157064, 0.7087595634758372, 1.0370434009983, -2.5676562997649057]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.1761853346243356, 6.52988736274682, 6.284659665815354, 6.494982690555901, 6.589438726544017, 0.23568685967217107]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [7.57601089444961, 7.581336676640908, 7.498464722904297, 7.709748387692847, 8.137968767913367, 10.360637430530952]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [7.57601089444961, 9.535819810747057, 11.0823373235433, 11.50995845808336, 11.93202755462022, 11.629431758819521]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.1217656285452717, 1.1879371415683369, 1.1563469323621143, 1.1699461534171205, 1.1891713418472665, 1.1670669067715427]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.1217656285452717, 1.301585108815369, 1.3351742741765296, 1.3323125715640756, 1.340430133919531, 1.2472832425281941]}}