{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:06.489865", "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-Sep-24_to_2025-Sep-27_280.5_34.5"}, "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": 2025090002547}, "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 24 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 27 2025"}, "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": 101166.53992961915}, "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": 34.5}, "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": 280.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "280.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 279.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 284.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-81.53, 34.03], [-81.18, 34.18], [-81.03, 34.53], [-80.68, 34.68], [-80.53, 35.03], [-80.18, 35.18], [-80.03, 35.53], [-79.68, 35.68], [-79.53, 36.03], [-79.18, 36.18], [-79.03, 36.53], [-78.5, 36.75], [-78.25, 36.65], [-78.18, 36.68], [-78.03, 37.03], [-77.68, 37.18], [-77.65, 37.25], [-77.75, 37.5], [-77.53, 38.03], [-77.0, 38.25], [-76.47, 38.03], [-76.32, 37.68], [-75.97, 37.53], [-75.82, 37.18], [-75.47, 37.03], [-75.25, 36.5], [-75.35, 36.25], [-75.25, 36.0], [-75.35, 35.75], [-75.25, 35.5], [-75.47, 34.97], [-76.0, 34.75], [-76.3, 34.88], [-76.47, 34.47], [-77.0, 34.25], [-77.25, 34.35], [-77.32, 34.32], [-77.47, 33.97], [-78.0, 33.75], [-78.25, 33.85], [-78.5, 33.75], [-78.75, 33.85], [-78.82, 33.82], [-78.97, 33.47], [-79.32, 33.32], [-79.35, 33.25], [-79.25, 33.0], [-79.47, 32.47], [-80.0, 32.25], [-80.25, 32.35], [-80.32, 32.32], [-80.47, 31.97], [-81.0, 31.75], [-81.53, 31.97], [-81.75, 32.5], [-81.65, 32.75], [-81.75, 33.0], [-81.65, 33.25], [-81.75, 33.5], [-81.53, 34.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.75, 33.0], [-81.64999999999998, 33.25], [-81.75, 33.5], [-81.52999999999997, 34.03], [-81.18, 34.18], [-81.02999999999997, 34.53], [-80.68, 34.68], [-80.52999999999997, 35.03], [-80.18, 35.18], [-80.02999999999997, 35.53], [-79.68, 35.68], [-79.52999999999997, 36.03], [-79.18, 36.18], [-79.02999999999997, 36.53], [-78.5, 36.75], [-78.25, 36.65], [-78.18, 36.68], [-78.02999999999997, 37.03], [-77.68, 37.18], [-77.64999999999998, 37.25], [-77.75, 37.5], [-77.52999999999997, 38.03], [-77.0, 38.25], [-76.47000000000003, 38.03], [-76.32, 37.68], [-75.97000000000003, 37.53], [-75.82, 37.18], [-75.47000000000003, 37.03], [-75.25, 36.5], [-75.45999999999998, 36.0], [-75.25, 35.5], [-75.47000000000003, 34.97], [-76.0, 34.75], [-76.30000000000001, 34.88], [-76.47000000000003, 34.47], [-77.0, 34.25], [-77.25, 34.35], [-77.32, 34.32], [-77.47000000000003, 33.97], [-78.0, 33.75], [-78.25, 33.85], [-78.5, 33.75], [-78.75, 33.85], [-78.82, 33.82], [-78.97000000000003, 33.47], [-79.32, 33.32], [-79.35000000000002, 33.25], [-79.25, 33.0], [-79.47000000000003, 32.47], [-80.0, 32.25], [-80.25, 32.35], [-80.32, 32.32], [-80.47000000000003, 31.97], [-81.0, 31.75], [-81.52999999999997, 31.97], [-81.75, 32.5], [-81.64999999999998, 32.75], [-81.75, 33.0]]]]}, "2025-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.75, 33.0], [-81.64999999999998, 33.25], [-81.75, 33.5], [-81.52999999999997, 34.03], [-81.18, 34.18], [-81.02999999999997, 34.53], [-80.68, 34.68], [-80.52999999999997, 35.03], [-80.18, 35.18], [-80.02999999999997, 35.53], [-79.68, 35.68], [-79.52999999999997, 36.03], [-79.18, 36.18], [-79.02999999999997, 36.53], [-78.5, 36.75], [-78.25, 36.65], [-78.18, 36.68], [-78.02999999999997, 37.03], [-77.68, 37.18], [-77.64999999999998, 37.25], [-77.75, 37.5], [-77.52999999999997, 38.03], [-77.0, 38.25], [-76.47000000000003, 38.03], [-76.32, 37.68], [-75.97000000000003, 37.53], [-75.82, 37.18], [-75.47000000000003, 37.03], [-75.25, 36.5], [-75.35000000000002, 36.25], [-75.25, 36.0], [-75.35000000000002, 35.75], [-75.25, 35.5], [-75.47000000000003, 34.97], [-76.0, 34.75], [-76.30000000000001, 34.88], [-76.47000000000003, 34.47], [-77.0, 34.25], [-77.25, 34.35], [-77.32, 34.32], [-77.47000000000003, 33.97], [-78.0, 33.75], [-78.25, 33.85], [-78.5, 33.75], [-78.75, 33.85], [-78.82, 33.82], [-78.97000000000003, 33.47], [-79.32, 33.32], [-79.35000000000002, 33.25], [-79.25, 33.0], [-79.47000000000003, 32.47], [-80.0, 32.25], [-80.25, 32.35], [-80.32, 32.32], [-80.47000000000003, 31.97], [-81.0, 31.75], [-81.52999999999997, 31.97], [-81.75, 32.5], [-81.64999999999998, 32.75], [-81.75, 33.0]]]]}, "2025-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.75, 33.0], [-81.64999999999998, 33.25], [-81.75, 33.5], [-81.52999999999997, 34.03], [-81.18, 34.18], [-81.02999999999997, 34.53], [-80.68, 34.68], [-80.52999999999997, 35.03], [-80.18, 35.18], [-80.02999999999997, 35.53], [-79.68, 35.68], [-79.52999999999997, 36.03], [-79.18, 36.18], [-79.02999999999997, 36.53], [-78.5, 36.75], [-78.25, 36.65], [-78.18, 36.68], [-78.02999999999997, 37.03], [-77.68, 37.18], [-77.64999999999998, 37.25], [-77.75, 37.5], [-77.52999999999997, 38.03], [-77.0, 38.25], [-76.47000000000003, 38.03], [-76.32, 37.68], [-75.97000000000003, 37.53], [-75.82, 37.18], [-75.47000000000003, 37.03], [-75.25, 36.5], [-75.35000000000002, 36.25], [-75.25, 36.0], [-75.35000000000002, 35.75], [-75.25, 35.5], [-75.47000000000003, 34.97], [-76.0, 34.75], [-76.30000000000001, 34.88], [-76.47000000000003, 34.47], [-77.0, 34.25], [-77.25, 34.35], [-77.32, 34.32], [-77.47000000000003, 33.97], [-78.0, 33.75], [-78.25, 33.85], [-78.5, 33.75], [-78.75, 33.85], [-78.82, 33.82], [-78.97000000000003, 33.47], [-79.32, 33.32], [-79.35000000000002, 33.25], [-79.25, 33.0], [-79.47000000000003, 32.47], [-80.0, 32.25], [-80.25, 32.35], [-80.32, 32.32], [-80.47000000000003, 31.97], [-81.0, 31.75], [-81.52999999999997, 31.97], [-81.75, 32.5], [-81.64999999999998, 32.75], [-81.75, 33.0]]]]}, "2025-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.52999999999997, 36.53], [-76.0, 36.75], [-75.47000000000003, 36.53], [-75.25, 36.0], [-75.47000000000003, 35.47], [-76.0, 35.25], [-76.52999999999997, 35.47], [-76.75, 36.0], [-76.52999999999997, 36.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 6.5532782907484375}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.553403794227063}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.931210242377347, 26.931612650553404, 26.461542002360034, 24.70707728068038]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.638458506266318, 28.60993092854818, 27.657664235432946, 24.70707728068038]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.05155367321717, 5.006846705131727, 4.635357460653299, 2.7096954203768178]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.472941694116344, 6.5532782907484375, 5.8427372077126165, 2.7096954203768178]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4087304125540292, 1.73453922359165, 1.6101652348601418, 1.3627123231580078]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6812310792689051, 2.0064910337738304, 2.010703087074429, 1.3627123231580078]}}