{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:59.010744", "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": "2023-Jan-07_to_2023-Jan-10_239.0_38.0"}, "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": 2023010001901}, "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 07 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 10 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 51720.67985826809}, "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": ["North Pacific 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": 38.0}, "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": 239.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "239.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 237.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 241.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.03, 38.53], [-122.5, 38.75], [-122.2, 38.63], [-122.15, 38.75], [-122.25, 39.0], [-122.03, 39.53], [-121.5, 39.75], [-120.97, 39.53], [-120.82, 39.18], [-120.47, 39.03], [-120.25, 38.5], [-120.35, 38.25], [-120.25, 38.0], [-120.47, 37.47], [-121.0, 37.25], [-121.25, 37.35], [-121.32, 37.32], [-121.47, 36.97], [-122.0, 36.75], [-122.25, 36.85], [-122.5, 36.75], [-123.03, 36.97], [-123.25, 37.5], [-123.15, 37.75], [-123.25, 38.0], [-123.03, 38.53]]]]}, "2023-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.03, 38.53], [-122.5, 38.75], [-122.2, 38.63], [-122.15, 38.75], [-122.25, 39.0], [-122.03, 39.53], [-121.5, 39.75], [-120.97, 39.53], [-120.82, 39.18], [-120.47, 39.03], [-120.25, 38.5], [-120.35, 38.25], [-120.32, 38.18], [-119.97, 38.03], [-119.82, 37.68], [-119.75, 37.65], [-119.5, 37.75], [-118.97, 37.53], [-118.75, 37.0], [-118.85, 36.75], [-118.82, 36.68], [-118.47, 36.53], [-118.25, 36.0], [-118.47, 35.47], [-119.0, 35.25], [-119.25, 35.35], [-119.5, 35.25], [-119.75, 35.35], [-119.82, 35.32], [-119.97, 34.97], [-120.5, 34.75], [-121.03, 34.97], [-121.18, 35.32], [-121.53, 35.47], [-121.75, 36.0], [-121.54, 36.5], [-121.7, 36.88], [-122.0, 36.75], [-122.25, 36.85], [-122.5, 36.75], [-123.03, 36.97], [-123.25, 37.5], [-123.15, 37.75], [-123.25, 38.0], [-123.03, 38.53]]]]}, "2023-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.03, 38.53], [-122.5, 38.75], [-122.2, 38.63], [-122.15, 38.75], [-122.25, 39.0], [-122.03, 39.53], [-121.5, 39.75], [-120.97, 39.53], [-120.82, 39.18], [-120.47, 39.03], [-120.25, 38.5], [-120.35, 38.25], [-120.32, 38.18], [-119.97, 38.03], [-119.82, 37.68], [-119.75, 37.65], [-119.5, 37.75], [-118.97, 37.53], [-118.75, 37.0], [-118.85, 36.75], [-118.82, 36.68], [-118.47, 36.53], [-118.25, 36.0], [-118.47, 35.47], [-119.0, 35.25], [-119.25, 35.35], [-119.5, 35.25], [-119.75, 35.35], [-119.82, 35.32], [-119.97, 34.97], [-120.5, 34.75], [-121.03, 34.97], [-121.18, 35.32], [-121.53, 35.47], [-121.75, 36.0], [-121.54, 36.5], [-121.7, 36.88], [-122.0, 36.75], [-122.25, 36.85], [-122.5, 36.75], [-123.03, 36.97], [-123.25, 37.5], [-123.15, 37.75], [-123.25, 38.0], [-123.03, 38.53]]]]}, "2023-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.03, 39.03], [-121.5, 39.25], [-121.25, 39.15], [-121.0, 39.25], [-120.47, 39.03], [-120.25, 38.5], [-120.35, 38.25], [-120.32, 38.18], [-119.97, 38.03], [-119.82, 37.68], [-119.75, 37.65], [-119.5, 37.75], [-118.97, 37.53], [-118.75, 37.0], [-118.85, 36.75], [-118.82, 36.68], [-118.47, 36.53], [-118.25, 36.0], [-118.47, 35.47], [-119.0, 35.25], [-119.25, 35.35], [-119.5, 35.25], [-119.75, 35.35], [-119.82, 35.32], [-119.97, 34.97], [-120.5, 34.75], [-121.03, 34.97], [-121.18, 35.32], [-121.53, 35.47], [-121.75, 36.0], [-121.54, 36.5], [-121.75, 37.0], [-121.65, 37.25], [-121.68, 37.32], [-122.03, 37.47], [-122.25, 38.0], [-122.15, 38.25], [-122.25, 38.5], [-122.03, 39.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 5.744261160223914}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.255195740235544}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.432461303262471, 12.96478578546953, 14.100915681297124, 13.339243055084467]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.847605164688218, 13.793610803480249, 14.920396495986267, 15.081632760109812]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.3326478717008996, 3.88802826358239, 4.965766386095091, 4.265131998761594]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.050150000789813, 4.837101865706131, 5.744261160223914, 5.5918721939505645]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3697977330808935, 1.5909901563164406, 2.034547887829996, 1.6921396669486064]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.463525862457094, 1.8367607430441437, 2.261874010230319, 2.2123819005054526]}}