{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:05.680879", "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-Apr-13_to_2025-Apr-15_84.0_26.0"}, "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": 2025040000333}, "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": "April 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 15 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 61502.53195885905}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia"]}, "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": 26.0}, "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": 84.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "84.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 83.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 86.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.97, 25.53], [83.32, 25.68], [83.35, 25.75], [83.25, 26.0], [83.47, 26.53], [84.0, 26.75], [84.3, 26.63], [84.47, 27.03], [85.0, 27.25], [85.25, 27.15], [85.5, 27.25], [86.03, 27.03], [86.18, 26.68], [86.25, 26.65], [86.5, 26.75], [87.03, 26.53], [87.25, 26.0], [87.03, 25.47], [86.68, 25.32], [86.65, 25.25], [86.75, 25.0], [86.65, 24.75], [86.75, 24.5], [86.53, 23.97], [86.0, 23.75], [85.75, 23.85], [85.5, 23.75], [85.25, 23.85], [85.0, 23.75], [84.75, 23.85], [84.5, 23.75], [84.25, 23.85], [84.0, 23.75], [83.75, 23.85], [83.5, 23.75], [82.97, 23.97], [82.75, 24.5], [82.85, 24.75], [82.75, 25.0], [82.97, 25.53]]]]}, "2025-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.97, 25.53], [83.32, 25.68], [83.35, 25.75], [83.25, 26.0], [83.47, 26.53], [84.0, 26.75], [84.3, 26.63], [84.47, 27.03], [85.0, 27.25], [85.25, 27.15], [85.5, 27.25], [86.03, 27.03], [86.18, 26.68], [86.25, 26.65], [86.5, 26.75], [87.03, 26.53], [87.25, 26.0], [87.03, 25.47], [86.68, 25.32], [86.65, 25.25], [86.75, 25.0], [86.65, 24.75], [86.75, 24.5], [86.53, 23.97], [86.0, 23.75], [85.75, 23.85], [85.5, 23.75], [85.25, 23.85], [85.0, 23.75], [84.75, 23.85], [84.5, 23.75], [84.25, 23.85], [84.0, 23.75], [83.75, 23.85], [83.5, 23.75], [82.97, 23.97], [82.75, 24.5], [82.85, 24.75], [82.75, 25.0], [82.97, 25.53]]]]}, "2025-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.97, 25.53], [83.32, 25.68], [83.35, 25.75], [83.25, 26.0], [83.47, 26.53], [84.0, 26.75], [84.3, 26.63], [84.47, 27.03], [85.0, 27.25], [85.25, 27.15], [85.5, 27.25], [86.03, 27.03], [86.18, 26.68], [86.25, 26.65], [86.5, 26.75], [87.03, 26.53], [87.25, 26.0], [87.03, 25.47], [86.68, 25.32], [86.65, 25.25], [86.75, 25.0], [86.65, 24.75], [86.75, 24.5], [86.53, 23.97], [86.0, 23.75], [85.75, 23.85], [85.5, 23.75], [85.25, 23.85], [85.0, 23.75], [84.75, 23.85], [84.5, 23.75], [84.25, 23.85], [84.0, 23.75], [83.75, 23.85], [83.5, 23.75], [82.97, 23.97], [82.75, 24.5], [82.85, 24.75], [82.75, 25.0], [82.97, 25.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.549366586080055}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.5525558480299857}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.868983205159566, 26.854897955692195, 27.2266590465199]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.816289520263695, 25.02078781127932, 25.05139567057296]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.5575782880471976, -3.6953378670803545, -3.4047513889624046]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.504346234028446, -4.517287869699203, -4.549366586080055]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8026051195404937, -1.8361586996364232, -1.6639352250377746]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4362943145561666, -2.2622287001691106, -2.0923076912785725]}}