{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:32.582234", "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": "2025-Aug-30_to_2025-Sep-04_240.0_36.5"}, "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": 2025080002992}, "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": "August 30 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 04 2025"}, "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": 54024.58712974633}, "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": 36.5}, "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": 240.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "240.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 238.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 241.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-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], [-120.0, 35.25], [-120.53, 35.47], [-120.68, 35.82], [-120.75, 35.85], [-121.0, 35.75], [-121.53, 35.97], [-121.75, 36.5], [-121.65, 36.75], [-121.68, 36.82], [-122.03, 36.97], [-122.18, 37.32], [-122.53, 37.47], [-122.75, 38.0], [-122.53, 38.53], [-122.18, 38.68], [-122.15, 38.75], [-122.25, 39.0], [-122.15, 39.25], [-122.25, 39.5], [-122.03, 40.03], [-121.5, 40.25], [-120.97, 40.03], [-120.82, 39.68], [-120.47, 39.53], [-120.25, 39.0], [-120.35, 38.75], [-120.32, 38.68], [-119.97, 38.53], [-119.82, 38.18], [-119.47, 38.03], [-119.32, 37.68], [-118.97, 37.53], [-118.75, 37.0], [-118.85, 36.75], [-118.82, 36.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.03, 36.47], [-121.25, 37.0], [-121.03, 37.53], [-120.5, 37.75], [-119.97, 37.53], [-119.82, 37.18], [-119.47, 37.03], [-119.25, 36.5], [-119.35, 36.25], [-119.25, 36.0], [-119.47, 35.47], [-120.0, 35.25], [-120.53, 35.47], [-120.75, 36.0], [-120.65, 36.25], [-120.68, 36.32], [-121.03, 36.47]]]]}, "2025-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.53, 37.47], [-122.75, 38.0], [-122.53, 38.53], [-122.18, 38.68], [-122.15, 38.75], [-122.25, 39.0], [-122.03, 39.53], [-121.5, 39.75], [-121.25, 39.65], [-121.0, 39.75], [-120.47, 39.53], [-120.25, 39.0], [-120.35, 38.75], [-120.32, 38.68], [-119.97, 38.53], [-119.82, 38.18], [-119.47, 38.03], [-119.32, 37.68], [-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], [-120.0, 35.25], [-120.53, 35.47], [-120.68, 35.82], [-120.75, 35.85], [-121.0, 35.75], [-121.53, 35.97], [-121.75, 36.5], [-121.65, 36.75], [-121.68, 36.82], [-122.03, 36.97], [-122.18, 37.32], [-122.53, 37.47]]]]}, "2025-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.53, 37.47], [-122.75, 38.0], [-122.53, 38.53], [-122.18, 38.68], [-122.15, 38.75], [-122.25, 39.0], [-122.15, 39.25], [-122.25, 39.5], [-122.03, 40.03], [-121.5, 40.25], [-120.97, 40.03], [-120.82, 39.68], [-120.47, 39.53], [-120.25, 39.0], [-120.35, 38.75], [-120.32, 38.68], [-119.97, 38.53], [-119.82, 38.18], [-119.47, 38.03], [-119.32, 37.68], [-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], [-120.0, 35.25], [-120.53, 35.47], [-120.68, 35.82], [-120.75, 35.85], [-121.0, 35.75], [-121.53, 35.97], [-121.75, 36.5], [-121.65, 36.75], [-121.68, 36.82], [-122.03, 36.97], [-122.18, 37.32], [-122.53, 37.47]]]]}, "2025-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.53, 37.47], [-122.75, 38.0], [-122.53, 38.53], [-122.18, 38.68], [-122.15, 38.75], [-122.25, 39.0], [-122.15, 39.25], [-122.25, 39.5], [-122.03, 40.03], [-121.5, 40.25], [-120.97, 40.03], [-120.82, 39.68], [-120.47, 39.53], [-120.25, 39.0], [-120.35, 38.75], [-120.32, 38.68], [-119.97, 38.53], [-119.82, 38.18], [-119.47, 38.03], [-119.32, 37.68], [-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], [-120.0, 35.25], [-120.53, 35.47], [-120.68, 35.82], [-120.75, 35.85], [-121.0, 35.75], [-121.53, 35.97], [-121.75, 36.5], [-121.65, 36.75], [-121.68, 36.82], [-122.03, 36.97], [-122.18, 37.32], [-122.53, 37.47]]]]}, "2025-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.53, 37.53], [-120.0, 37.75], [-119.47, 37.53], [-119.32, 37.18], [-118.97, 37.03], [-118.82, 36.68], [-118.47, 36.53], [-118.25, 36.0], [-118.47, 35.47], [-119.0, 35.25], [-119.53, 35.47], [-119.68, 35.82], [-119.75, 35.85], [-120.0, 35.75], [-120.53, 35.97], [-120.75, 36.5], [-120.65, 36.75], [-120.75, 37.0], [-120.53, 37.53]]], [[[-121.5, 38.75], [-122.03, 38.97], [-122.25, 39.5], [-122.03, 40.03], [-121.5, 40.25], [-120.97, 40.03], [-120.75, 39.5], [-120.97, 38.97], [-121.5, 38.75]]]]}, "2025-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.75, 37.0], [-120.53, 37.53], [-120.0, 37.75], [-119.47, 37.53], [-119.32, 37.18], [-118.97, 37.03], [-118.82, 36.68], [-118.47, 36.53], [-118.25, 36.0], [-118.47, 35.47], [-119.0, 35.25], [-119.53, 35.47], [-119.68, 35.82], [-119.75, 35.85], [-120.0, 35.75], [-120.53, 35.97], [-120.75, 36.5], [-120.65, 36.75], [-120.75, 37.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 7.019215076388491}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.765063500367751}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.354109700520837, 29.998289332314187, 29.77324933138766, 30.319869209058368, 29.947180684407556, 30.578247324625693]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [31.04266764322921, 34.33483912150069, 34.09005508422854, 34.00941111246749, 31.18953094482424, 31.730652109781943]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.446102963416062, 4.820485852534375, 4.674547377014216, 5.395975509192588, 3.611088985679646, 3.933607327474718]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.6852418175705566, 7.019215076388491, 6.847381594836918, 6.985840740737331, 4.271633902167537, 4.917832142941052]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.2821000642737628, 1.7175108443895981, 1.6792338850446737, 1.955246069930356, 1.3089738516421288, 1.4280480383083562]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.335886895604544, 2.4321652389763897, 2.371663553850061, 2.5596707153757032, 1.4880307903270846, 1.733857267256997]}}