{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:47.137833", "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-Jun-17_to_2025-Jun-20_88.0_23.0"}, "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": 2025060000603}, "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": "June 17 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 20 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": 73748.64079697036}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 23.0}, "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": 88.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "88.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 83.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 88.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 22.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[88.53, 23.53], [88.75, 23.0], [88.53, 22.47], [88.18, 22.32], [88.03, 21.97], [87.68, 21.82], [87.53, 21.47], [87.0, 21.25], [86.47, 21.47], [86.25, 22.0], [86.35, 22.25], [86.32, 22.32], [86.25, 22.35], [86.0, 22.25], [85.75, 22.35], [85.5, 22.25], [85.25, 22.35], [85.18, 22.32], [85.03, 21.97], [84.5, 21.75], [84.25, 21.85], [84.0, 21.75], [83.75, 21.85], [83.5, 21.75], [82.97, 21.97], [82.75, 22.5], [82.97, 23.03], [83.32, 23.18], [83.47, 23.53], [83.82, 23.68], [83.85, 23.75], [83.75, 24.0], [83.97, 24.53], [84.32, 24.68], [84.47, 25.03], [85.0, 25.25], [85.25, 25.15], [85.32, 25.18], [85.47, 25.53], [86.0, 25.75], [86.25, 25.65], [86.5, 25.75], [87.03, 25.53], [87.25, 25.0], [87.03, 24.47], [86.68, 24.32], [86.57, 24.07], [87.0, 24.25], [87.53, 24.03], [87.7, 23.63], [88.0, 23.75], [88.53, 23.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-06-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[86.25, 22.5], [86.47, 23.03], [87.0, 23.25], [87.25, 23.15], [87.32, 23.18], [87.47, 23.53], [88.0, 23.75], [88.53, 23.53], [88.75, 23.0], [88.53, 22.47], [88.18, 22.32], [88.03, 21.97], [87.68, 21.82], [87.53, 21.47], [87.0, 21.25], [86.47, 21.47], [86.25, 22.0], [86.35, 22.25], [86.25, 22.5]]]]}, "2025-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[83.47, 23.53], [83.82, 23.68], [83.85, 23.75], [83.75, 24.0], [83.97, 24.53], [84.32, 24.68], [84.47, 25.03], [85.0, 25.25], [85.25, 25.15], [85.32, 25.18], [85.47, 25.53], [86.0, 25.75], [86.25, 25.65], [86.5, 25.75], [87.03, 25.53], [87.25, 25.0], [87.03, 24.47], [86.68, 24.32], [86.57, 24.07], [87.0, 24.25], [87.53, 24.03], [87.7, 23.63], [88.0, 23.75], [88.53, 23.53], [88.75, 23.0], [88.53, 22.47], [88.18, 22.32], [88.03, 21.97], [87.68, 21.82], [87.53, 21.47], [87.0, 21.25], [86.47, 21.47], [86.25, 22.0], [86.35, 22.25], [86.32, 22.32], [86.25, 22.35], [86.0, 22.25], [85.75, 22.35], [85.5, 22.25], [85.25, 22.35], [85.18, 22.32], [85.03, 21.97], [84.5, 21.75], [84.25, 21.85], [84.0, 21.75], [83.75, 21.85], [83.5, 21.75], [82.97, 21.97], [82.75, 22.5], [82.97, 23.03], [83.32, 23.18], [83.47, 23.53]]]]}, "2025-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[83.47, 23.53], [83.82, 23.68], [83.85, 23.75], [83.75, 24.0], [83.97, 24.53], [84.32, 24.68], [84.47, 25.03], [85.0, 25.25], [85.25, 25.15], [85.32, 25.18], [85.47, 25.53], [86.0, 25.75], [86.25, 25.65], [86.5, 25.75], [87.03, 25.53], [87.25, 25.0], [87.03, 24.47], [86.68, 24.32], [86.57, 24.07], [87.0, 24.25], [87.53, 24.03], [87.7, 23.63], [88.0, 23.75], [88.53, 23.53], [88.75, 23.0], [88.53, 22.47], [88.18, 22.32], [88.03, 21.97], [87.68, 21.82], [87.53, 21.47], [87.0, 21.25], [86.47, 21.47], [86.25, 22.0], [86.35, 22.25], [86.32, 22.32], [86.25, 22.35], [86.0, 22.25], [85.75, 22.35], [85.5, 22.25], [85.25, 22.35], [85.18, 22.32], [85.03, 21.97], [84.5, 21.75], [84.25, 21.85], [84.0, 21.75], [83.75, 21.85], [83.5, 21.75], [82.97, 21.97], [82.75, 22.5], [82.97, 23.03], [83.32, 23.18], [83.47, 23.53]]]]}, "2025-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[83.47, 23.53], [83.82, 23.68], [83.85, 23.75], [83.75, 24.0], [83.97, 24.53], [84.32, 24.68], [84.47, 25.03], [85.0, 25.25], [85.25, 25.15], [85.32, 25.18], [85.47, 25.53], [86.0, 25.75], [86.25, 25.65], [86.5, 25.75], [87.03, 25.53], [87.25, 25.0], [87.03, 24.47], [86.68, 24.32], [86.57, 24.07], [87.0, 24.25], [87.53, 24.03], [87.75, 23.5], [87.53, 22.97], [87.18, 22.82], [87.03, 22.47], [86.5, 22.25], [86.25, 22.35], [86.0, 22.25], [85.75, 22.35], [85.5, 22.25], [85.25, 22.35], [85.18, 22.32], [85.03, 21.97], [84.5, 21.75], [84.25, 21.85], [84.0, 21.75], [83.75, 21.85], [83.5, 21.75], [82.97, 21.97], [82.75, 22.5], [82.97, 23.03], [83.32, 23.18], [83.47, 23.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.596704195801578}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.3395053274698294}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.27908859252932, 25.729928882305444, 25.4200728587615, 25.571776442094233]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.22427902221682, 23.460619862874353, 23.470002746582054, 23.53751907348635]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7810650435077093, -3.4706029227119584, -3.5630490897259985, -3.0219183202376807]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.914639077266145, -4.453882904729539, -4.596704195801578, -4.189362539169565]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3554903767339508, -1.4385645443554624, -1.54631983274459, -1.3222646509810074]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4433652073452554, -1.7898711082981071, -2.1178098067089466, -1.5833133168997513]}}