{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:22:49.888526", "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": "2020-Dec-31_to_2021-Jan-08_240.5_47.5"}, "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": 2020120003008}, "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": "December 31 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 08 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 70364.41359649047}, "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": ["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": []}, "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": 47.5}, "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": 240.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "240.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 238.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 242.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.65, 46.25], [-121.75, 46.5], [-121.53, 47.03], [-121.0, 47.25], [-120.75, 47.15], [-120.5, 47.25], [-119.97, 47.03], [-119.75, 46.5], [-119.85, 46.25], [-119.75, 46.0], [-119.85, 45.75], [-119.75, 45.5], [-119.97, 44.97], [-120.5, 44.75], [-120.75, 44.85], [-121.0, 44.75], [-121.53, 44.97], [-121.75, 45.5], [-121.65, 45.75], [-121.75, 46.0], [-121.65, 46.25]]]]}, "2021-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.65, 46.25], [-121.75, 46.5], [-121.53, 47.03], [-121.0, 47.25], [-120.75, 47.15], [-120.5, 47.25], [-119.97, 47.03], [-119.75, 46.5], [-119.85, 46.25], [-119.75, 46.0], [-119.85, 45.75], [-119.75, 45.5], [-119.97, 44.97], [-120.5, 44.75], [-120.75, 44.85], [-121.0, 44.75], [-121.53, 44.97], [-121.75, 45.5], [-121.65, 45.75], [-121.75, 46.0], [-121.65, 46.25]]]]}, "2021-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.15, 45.25], [-122.25, 45.5], [-122.15, 45.75], [-122.25, 46.0], [-122.03, 46.53], [-121.68, 46.68], [-121.53, 47.03], [-121.0, 47.25], [-120.75, 47.15], [-120.5, 47.25], [-120.25, 47.15], [-120.12, 47.2], [-120.25, 47.5], [-120.15, 47.75], [-120.25, 48.0], [-120.03, 48.53], [-119.5, 48.75], [-119.25, 48.65], [-119.0, 48.75], [-118.47, 48.53], [-118.32, 48.18], [-118.25, 48.15], [-118.0, 48.25], [-117.47, 48.03], [-117.25, 47.5], [-117.35, 47.25], [-117.25, 47.0], [-117.35, 46.75], [-117.25, 46.5], [-117.47, 45.97], [-117.82, 45.82], [-117.97, 45.47], [-118.5, 45.25], [-118.75, 45.35], [-118.82, 45.32], [-118.97, 44.97], [-119.5, 44.75], [-119.75, 44.85], [-120.0, 44.75], [-120.25, 44.85], [-120.32, 44.82], [-120.47, 44.47], [-120.82, 44.32], [-120.97, 43.97], [-121.5, 43.75], [-122.03, 43.97], [-122.25, 44.5], [-122.15, 44.75], [-122.25, 45.0], [-122.15, 45.25]]]]}, "2021-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.15, 45.25], [-122.25, 45.5], [-122.15, 45.75], [-122.25, 46.0], [-122.03, 46.53], [-121.68, 46.68], [-121.53, 47.03], [-121.0, 47.25], [-120.75, 47.15], [-120.5, 47.25], [-120.25, 47.15], [-120.12, 47.2], [-120.25, 47.5], [-120.15, 47.75], [-120.25, 48.0], [-120.03, 48.53], [-119.5, 48.75], [-119.25, 48.65], [-119.0, 48.75], [-118.47, 48.53], [-118.32, 48.18], [-118.25, 48.15], [-118.0, 48.25], [-117.47, 48.03], [-117.25, 47.5], [-117.35, 47.25], [-117.25, 47.0], [-117.35, 46.75], [-117.25, 46.5], [-117.47, 45.97], [-117.82, 45.82], [-117.97, 45.47], [-118.5, 45.25], [-118.75, 45.35], [-118.82, 45.32], [-118.97, 44.97], [-119.5, 44.75], [-119.75, 44.85], [-120.0, 44.75], [-120.25, 44.85], [-120.32, 44.82], [-120.47, 44.47], [-120.82, 44.32], [-120.97, 43.97], [-121.5, 43.75], [-122.03, 43.97], [-122.25, 44.5], [-122.15, 44.75], [-122.25, 45.0], [-122.15, 45.25]]]]}, "2021-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.15, 45.25], [-122.25, 45.5], [-122.15, 45.75], [-122.25, 46.0], [-122.03, 46.53], [-121.5, 46.75], [-121.25, 46.65], [-121.18, 46.68], [-121.03, 47.03], [-120.5, 47.25], [-120.25, 47.15], [-120.12, 47.2], [-120.25, 47.5], [-120.15, 47.75], [-120.25, 48.0], [-120.03, 48.53], [-119.5, 48.75], [-119.25, 48.65], [-119.0, 48.75], [-118.47, 48.53], [-118.32, 48.18], [-118.25, 48.15], [-118.0, 48.25], [-117.47, 48.03], [-117.25, 47.5], [-117.35, 47.25], [-117.25, 47.0], [-117.35, 46.75], [-117.25, 46.5], [-117.47, 45.97], [-117.82, 45.82], [-117.97, 45.47], [-118.5, 45.25], [-118.75, 45.35], [-118.82, 45.32], [-118.97, 44.97], [-119.5, 44.75], [-119.75, 44.85], [-120.0, 44.75], [-120.25, 44.85], [-120.32, 44.82], [-120.47, 44.47], [-120.82, 44.32], [-120.97, 43.97], [-121.5, 43.75], [-122.03, 43.97], [-122.25, 44.5], [-122.15, 44.75], [-122.25, 45.0], [-122.15, 45.25]]]]}, "2021-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.5, 48.25], [-118.97, 48.03], [-118.75, 47.5], [-118.97, 46.97], [-119.5, 46.75], [-120.03, 46.97], [-120.25, 47.5], [-120.03, 48.03], [-119.5, 48.25]]]]}, "2021-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.53, 48.03], [-120.18, 48.18], [-120.03, 48.53], [-119.5, 48.75], [-118.97, 48.53], [-118.75, 48.0], [-118.85, 47.75], [-118.75, 47.5], [-118.85, 47.25], [-118.75, 47.0], [-118.97, 46.47], [-119.5, 46.25], [-119.75, 46.35], [-120.0, 46.25], [-120.53, 46.47], [-120.75, 47.0], [-120.65, 47.25], [-120.75, 47.5], [-120.53, 48.03]]]]}, "2021-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.53, 48.03], [-120.18, 48.18], [-120.03, 48.53], [-119.5, 48.75], [-118.97, 48.53], [-118.75, 48.0], [-118.85, 47.75], [-118.75, 47.5], [-118.85, 47.25], [-118.75, 47.0], [-118.97, 46.47], [-119.5, 46.25], [-119.75, 46.35], [-120.0, 46.25], [-120.53, 46.47], [-120.75, 47.0], [-120.65, 47.25], [-120.75, 47.5], [-120.53, 48.03]]]]}, "2021-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.53, 48.03], [-120.18, 48.18], [-120.03, 48.53], [-119.5, 48.75], [-118.97, 48.53], [-118.75, 48.0], [-118.85, 47.75], [-118.75, 47.5], [-118.85, 47.25], [-118.75, 47.0], [-118.97, 46.47], [-119.5, 46.25], [-119.75, 46.35], [-120.0, 46.25], [-120.53, 46.47], [-120.75, 47.0], [-120.65, 47.25], [-120.75, 47.5], [-120.53, 48.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 9.975590585322266}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 6.356647111382748}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.408185257297248, 4.31291286306481, 5.450616998770329, 7.266222191009945, 6.110549377904306, 2.1308659840761948, 4.318982741956688, 4.055745060320817, 3.5815096679732505]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.970869714105845, 6.15495473009986, 8.34857912856279, 11.219849855182815, 8.851357868228718, 2.1308659840761948, 6.288033095672176, 5.829384326172828, 4.591060186727248]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.289515942834659, 5.114454048101227, 5.814921987528282, 7.528222421883102, 6.30136967840258, 5.438781961441293, 7.003144097815072, 6.64432717320849, 6.1187401627181774]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.092399383108045, 5.5772324504259245, 6.731537913751481, 9.975590585322266, 7.5512866033091655, 5.438781961441293, 7.746515151144081, 7.450272598150832, 6.671056160423973]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.065924999294748, 1.242995871906852, 1.3000584752218278, 1.6705049431105727, 1.3737429657307125, 1.0982842282830327, 1.4568044848290904, 1.3614658071823122, 1.228812422651405]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.2231564078035377, 1.3203307857565214, 1.5298662314563476, 2.0802707972903263, 1.568609168722562, 1.0982842282830327, 1.5201138587039291, 1.4435164184064875, 1.3415032868162453]}}