{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:51.524430", "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-03_to_2025-Aug-06_82.0_28.0"}, "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": 2025080000219}, "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 03 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 06 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": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 126531.89617952949}, "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": ["India", "Nepal"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia"]}, "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": 28.0}, "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": 82.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "82.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 79.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 84.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 25.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 28.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[78.35, 27.75], [78.25, 28.0], [78.47, 28.53], [79.0, 28.75], [79.25, 28.65], [79.5, 28.75], [79.8, 28.63], [79.97, 29.03], 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"polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[78.25, 27.0], [78.35, 27.25], [78.25, 27.5], [78.35, 27.75], [78.25, 28.0], [78.47, 28.53], [79.0, 28.75], [79.25, 28.65], [79.5, 28.75], [80.03, 28.53], [80.18, 28.18], [80.25, 28.15], [80.32, 28.18], [80.47, 28.53], [81.0, 28.75], [81.25, 28.65], [81.5, 28.75], [81.75, 28.65], [82.0, 28.75], [82.53, 28.53], [82.68, 28.18], [83.03, 28.03], [83.18, 27.68], [83.25, 27.65], [83.5, 27.75], [83.75, 27.65], [84.0, 27.75], [84.53, 27.53], [84.75, 27.0], [84.65, 26.75], [84.75, 26.5], [84.65, 26.25], [84.68, 26.18], [85.03, 26.03], [85.25, 25.5], [85.03, 24.97], [84.5, 24.75], [84.25, 24.85], [84.0, 24.75], [83.75, 24.85], [83.5, 24.75], [82.97, 24.97], [82.82, 25.32], [82.47, 25.47], [82.32, 25.82], [82.25, 25.85], [82.0, 25.75], [81.47, 25.97], [81.32, 26.32], [81.25, 26.35], [81.18, 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{"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.5040719796876942}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.3766326562428226}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.35658270028921, 26.47623203664591, 26.759784510515715, 26.212892877487945]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.60014114379885, 22.3995134989421, 21.70246276855471, 22.076575215657556]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.163470993760169, -2.6558808750843554, -2.401230284122368, -1.9720895053609573]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m 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