{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:27:29.482100", "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-25_to_2021-Oct-02_303.5_46.5"}, "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": 2021090002538}, "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 25 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 02 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 117486.85952695057}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America", "N.Atlantic-Ocean"]}, "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 St. Lawrence", "North Atlantic Ocean"]}, "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": 46.5}, "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": 303.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "303.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 299.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 304.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 42.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.03, 42.97], [-61.25, 43.5], [-61.03, 44.03], [-60.5, 44.25], [-60.25, 44.15], [-60.0, 44.25], [-59.47, 44.03], [-59.25, 43.5], [-59.47, 42.97], [-60.0, 42.75], [-60.25, 42.85], [-60.5, 42.75], [-61.03, 42.97]]]]}, "2021-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.03, 44.47], [-61.25, 45.0], [-61.03, 45.53], [-60.5, 45.75], [-60.25, 45.65], [-60.0, 45.75], [-59.75, 45.65], [-59.5, 45.75], [-58.97, 45.53], [-58.75, 45.0], [-58.85, 44.75], [-58.75, 44.5], [-58.85, 44.25], [-58.82, 44.18], [-58.47, 44.03], [-58.25, 43.5], [-58.47, 42.97], [-59.0, 42.75], [-59.25, 42.85], [-59.5, 42.75], [-59.75, 42.85], [-60.0, 42.75], [-60.25, 42.85], [-60.5, 42.75], [-61.03, 42.97], [-61.25, 43.5], [-61.03, 44.03], [-60.68, 44.18], [-60.65, 44.25], [-60.68, 44.32], [-61.03, 44.47]]], [[[-58.5, 47.75], [-57.97, 47.53], [-57.75, 47.0], [-57.85, 46.75], [-57.75, 46.5], [-57.97, 45.97], [-58.5, 45.75], [-59.03, 45.97], [-59.25, 46.5], [-59.15, 46.75], [-59.25, 47.0], [-59.03, 47.53], [-58.5, 47.75]]]]}, "2021-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-60.68, 44.32], [-61.03, 44.47], [-61.25, 45.0], [-61.03, 45.53], [-60.68, 45.68], [-60.53, 46.03], [-60.0, 46.25], [-59.75, 46.15], [-59.68, 46.18], [-59.53, 46.53], [-59.18, 46.68], [-59.15, 46.75], [-59.25, 47.0], [-59.03, 47.53], [-58.5, 47.75], [-58.0, 47.54], [-57.5, 47.75], [-57.25, 47.65], [-57.0, 47.75], [-56.75, 47.65], [-56.68, 47.68], [-56.53, 48.03], [-56.0, 48.25], [-55.47, 48.03], [-55.25, 47.5], [-55.35, 47.25], [-55.32, 47.18], [-54.97, 47.03], [-54.75, 46.5], [-54.85, 46.25], [-54.75, 46.0], [-54.97, 45.47], [-55.5, 45.25], [-55.75, 45.35], [-56.0, 45.25], [-56.25, 45.35], [-56.32, 45.32], [-56.35, 45.25], [-56.25, 45.0], [-56.47, 44.47], [-57.0, 44.25], [-57.25, 44.35], [-57.5, 44.25], [-57.75, 44.35], [-58.0, 44.25], [-58.25, 44.35], [-58.32, 44.32], [-58.35, 44.25], [-58.32, 44.18], [-57.97, 44.03], [-57.75, 43.5], [-57.97, 42.97], [-58.5, 42.75], [-58.75, 42.85], [-59.0, 42.75], [-59.25, 42.85], [-59.5, 42.75], [-59.75, 42.85], [-60.0, 42.75], [-60.25, 42.85], [-60.5, 42.75], [-61.03, 42.97], [-61.25, 43.5], [-61.03, 44.03], [-60.68, 44.18], [-60.65, 44.25], [-60.68, 44.32]]]]}, "2021-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.03, 45.53], [-60.68, 45.68], [-60.53, 46.03], [-60.0, 46.25], [-59.75, 46.15], [-59.68, 46.18], [-59.53, 46.53], [-59.18, 46.68], [-59.15, 46.75], [-59.25, 47.0], [-59.03, 47.53], [-58.5, 47.75], [-58.0, 47.54], [-57.5, 47.75], [-57.25, 47.65], [-57.0, 47.75], [-56.75, 47.65], [-56.68, 47.68], [-56.53, 48.03], [-56.0, 48.25], [-55.47, 48.03], [-55.25, 47.5], [-55.35, 47.25], [-55.32, 47.18], [-54.97, 47.03], [-54.75, 46.5], [-54.85, 46.25], [-54.75, 46.0], [-54.97, 45.47], [-55.5, 45.25], [-55.75, 45.35], [-56.0, 45.25], [-56.25, 45.35], [-56.32, 45.32], [-56.35, 45.25], [-56.25, 45.0], [-56.47, 44.47], [-57.0, 44.25], [-57.25, 44.35], [-57.32, 44.32], [-57.46, 44.0], [-57.25, 43.5], [-57.47, 42.97], [-57.82, 42.82], [-57.97, 42.47], [-58.5, 42.25], [-58.75, 42.35], [-59.0, 42.25], [-59.25, 42.35], [-59.5, 42.25], [-60.03, 42.47], [-60.18, 42.82], [-60.25, 42.85], [-60.5, 42.75], [-61.03, 42.97], [-61.25, 43.5], [-61.04, 44.0], [-61.25, 44.5], [-61.15, 44.75], [-61.25, 45.0], [-61.03, 45.53]]]]}, "2021-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.03, 45.53], [-60.68, 45.68], [-60.53, 46.03], [-60.0, 46.25], [-59.75, 46.15], [-59.68, 46.18], [-59.53, 46.53], [-59.18, 46.68], [-59.03, 47.03], [-58.5, 47.25], [-58.25, 47.15], [-58.18, 47.18], [-58.03, 47.53], [-57.5, 47.75], [-57.25, 47.65], [-57.0, 47.75], [-56.75, 47.65], [-56.68, 47.68], [-56.53, 48.03], [-56.0, 48.25], [-55.47, 48.03], [-55.25, 47.5], [-55.35, 47.25], [-55.32, 47.18], [-54.97, 47.03], [-54.75, 46.5], [-54.85, 46.25], [-54.75, 46.0], [-54.97, 45.47], [-55.5, 45.25], [-55.75, 45.35], [-56.0, 45.25], [-56.25, 45.35], [-56.32, 45.32], [-56.35, 45.25], [-56.25, 45.0], [-56.47, 44.47], [-57.0, 44.25], [-57.25, 44.35], [-57.32, 44.32], [-57.46, 44.0], [-57.25, 43.5], [-57.47, 42.97], [-57.82, 42.82], [-57.97, 42.47], [-58.5, 42.25], [-58.75, 42.35], [-59.0, 42.25], [-59.25, 42.35], [-59.5, 42.25], [-60.03, 42.47], [-60.18, 42.82], [-60.25, 42.85], [-60.5, 42.75], [-61.03, 42.97], [-61.25, 43.5], [-61.04, 44.0], [-61.25, 44.5], [-61.15, 44.75], [-61.25, 45.0], [-61.03, 45.53]]]]}, "2021-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.03, 45.53], [-60.68, 45.68], [-60.53, 46.03], [-60.0, 46.25], [-59.75, 46.15], [-59.68, 46.18], [-59.53, 46.53], [-59.18, 46.68], [-59.03, 47.03], [-58.5, 47.25], [-58.25, 47.15], [-58.18, 47.18], [-58.03, 47.53], [-57.5, 47.75], [-57.25, 47.65], [-57.0, 47.75], [-56.75, 47.65], [-56.68, 47.68], [-56.53, 48.03], [-56.0, 48.25], [-55.47, 48.03], [-55.25, 47.5], [-55.35, 47.25], [-55.25, 47.0], [-55.35, 46.75], [-55.25, 46.5], [-55.47, 45.97], [-55.82, 45.82], [-55.97, 45.47], [-56.32, 45.32], [-56.35, 45.25], [-56.25, 45.0], [-56.47, 44.47], [-57.0, 44.25], [-57.25, 44.35], [-57.32, 44.32], [-57.46, 44.0], [-57.25, 43.5], [-57.47, 42.97], [-57.82, 42.82], [-57.97, 42.47], [-58.5, 42.25], [-58.75, 42.35], [-59.0, 42.25], [-59.25, 42.35], [-59.5, 42.25], [-60.03, 42.47], [-60.18, 42.82], [-60.53, 42.97], [-60.75, 43.5], [-60.65, 43.75], [-60.68, 43.82], [-61.03, 43.97], [-61.25, 44.5], [-61.15, 44.75], [-61.25, 45.0], [-61.03, 45.53]]]]}, "2021-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-59.53, 46.53], [-59.18, 46.68], [-59.03, 47.03], [-58.5, 47.25], [-58.25, 47.15], [-58.18, 47.18], [-58.03, 47.53], [-57.5, 47.75], [-57.25, 47.65], [-57.0, 47.75], [-56.75, 47.65], [-56.68, 47.68], [-56.53, 48.03], [-56.0, 48.25], [-55.47, 48.03], [-55.25, 47.5], [-55.35, 47.25], [-55.25, 47.0], [-55.35, 46.75], [-55.25, 46.5], [-55.47, 45.97], [-55.82, 45.82], [-55.97, 45.47], [-56.32, 45.32], [-56.35, 45.25], [-56.25, 45.0], [-56.47, 44.47], [-57.0, 44.25], [-57.25, 44.35], [-57.5, 44.25], [-57.75, 44.35], [-58.0, 44.25], [-58.25, 44.35], [-58.5, 44.25], [-59.03, 44.47], [-59.18, 44.82], [-59.53, 44.97], [-59.75, 45.5], [-59.65, 45.75], [-59.75, 46.0], [-59.53, 46.53]]]]}, "2021-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.65, 46.75], [-57.75, 47.0], [-57.53, 47.53], [-57.0, 47.75], [-56.75, 47.65], [-56.5, 47.75], [-55.97, 47.53], [-55.82, 47.18], [-55.47, 47.03], [-55.25, 46.5], [-55.47, 45.97], [-56.0, 45.75], [-56.25, 45.85], [-56.32, 45.82], [-56.47, 45.47], [-57.0, 45.25], [-57.53, 45.47], [-57.75, 46.0], [-57.65, 46.25], [-57.75, 46.5], [-57.65, 46.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 4.780965934030235}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 3.2771939698538115}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.331940702123347, 18.39218807353535, 17.318156245248304, 17.775822602289793, 17.993283572110613, 17.32645916194457, 15.938366441608196, 15.129455111074037]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.469449490151703, 20.03816832636909, 19.791371712494424, 20.841801266068785, 21.290913254256964, 21.038878954880374, 16.7110520744738, 15.632854887684118]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.977111218155045, 3.0635993938591444, 3.0470233587053746, 3.3585965353521696, 3.7144405282527844, 3.2156213894403365, 2.97406194244081, 2.813938087992549]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.0664140125441577, 3.7345360683041235, 3.418289930515755, 4.055149394704642, 4.780965934030235, 4.167465151898625, 3.8185913677551753, 2.9198049341756587]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4687361519952664, 1.5465362885944762, 1.5773975121530377, 1.707777517839602, 1.8721945801882502, 1.6194912801394197, 1.5589639761780827, 1.5036465882400716]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.499596597213287, 1.8160131960942014, 1.8000435639187329, 1.9232041664571133, 2.238056053289816, 1.9365631132724488, 2.0911195383401115, 1.567366566637364]}}