{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:30.877205", "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-Jul-03_to_2025-Jul-09_276.5_36.0"}, "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": 2025070001526}, "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": "July 03 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 09 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 54657.48201372788}, "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": 36.0}, "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": 276.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "276.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 275.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 278.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-82.25, 36.5], [-82.35, 36.25], [-82.25, 36.0], [-82.35, 35.75], [-82.25, 35.5], [-82.47, 34.97], [-83.0, 34.75], [-83.3, 34.88], [-83.47, 34.47], [-83.82, 34.32], [-83.97, 33.97], [-84.5, 33.75], [-85.03, 33.97], [-85.25, 34.5], [-85.15, 34.75], [-85.25, 35.0], [-85.04, 35.5], [-85.25, 36.0], [-85.03, 36.53], [-84.68, 36.68], [-84.65, 36.75], [-84.75, 37.0], [-84.65, 37.25], [-84.75, 37.5], [-84.53, 38.03], [-84.0, 38.25], [-83.75, 38.15], [-83.5, 38.25], [-83.25, 38.15], [-83.0, 38.25], [-82.75, 38.15], [-82.68, 38.18], [-82.53, 38.53], [-82.0, 38.75], [-81.47, 38.53], [-81.32, 38.18], [-80.97, 38.03], [-80.75, 37.5], [-80.97, 36.97], [-81.5, 36.75], [-81.75, 36.85], [-82.0, 36.75], [-82.25, 36.85], [-82.32, 36.82], [-82.35, 36.75], [-82.25, 36.5]]]]}}, "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": {"2025-07-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.02999999999997, 36.53], [-83.5, 36.75], [-82.97000000000003, 36.53], [-82.75, 36.0], [-82.97000000000003, 35.47], [-83.5, 35.25], [-84.02999999999997, 35.47], [-84.25, 36.0], [-84.02999999999997, 36.53]]]]}, "2025-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.02999999999997, 37.03], [-83.62, 37.2], [-83.75, 37.5], [-83.52999999999997, 38.03], [-83.0, 38.25], [-82.75, 38.15], [-82.5, 38.25], [-81.97000000000003, 38.03], [-81.75, 37.5], [-81.97000000000003, 36.97], [-82.37, 36.8], [-82.25, 36.5], [-82.47000000000003, 35.97], [-82.82, 35.82], [-82.97000000000003, 35.47], [-83.5, 35.25], [-83.75, 35.35], [-84.0, 35.25], [-84.52999999999997, 35.47], [-84.75, 36.0], [-84.52999999999997, 36.53], [-84.18, 36.68], [-84.02999999999997, 37.03]]]]}, "2025-07-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.64999999999998, 36.75], [-84.75, 37.0], [-84.64999999999998, 37.25], [-84.75, 37.5], [-84.52999999999997, 38.03], [-84.0, 38.25], [-83.75, 38.15], [-83.5, 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"description": "Maximum t2m anomaly recorded over entire duration", "value": 4.983922783360924}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 3.2332014307124886}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.630825297037802, 27.37515157063808, 27.27787806193038, 27.454287465413472, 27.210015753543814, 26.712115224202478, 26.366657511393214]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.630825297037802, 28.563709513346396, 29.315501149495446, 29.237134552001976, 29.668589528401696, 29.19583918253585, 28.5833730061849]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.869999857726782, 3.1944644011563716, 3.3958654068294756, 3.447325261650043, 3.3586785022354904, 2.9214157652302597, 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