{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:24.755007", "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_83.5_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": 2025040000382}, "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": 81155.41326281353}, "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": 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": 83.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "83.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 83.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 86.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[82.47, 25.53], [82.82, 25.68], [82.85, 25.75], [82.75, 26.0], [82.97, 26.53], [83.5, 26.75], [83.75, 26.65], [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], [87.15, 25.75], [87.25, 25.5], [87.03, 24.97], [86.68, 24.82], [86.65, 24.75], [86.75, 24.5], [86.53, 23.97], [86.18, 23.82], [86.15, 23.75], [86.25, 23.5], [86.03, 22.97], [85.5, 22.75], [85.25, 22.85], [85.0, 22.75], [84.47, 22.97], [84.25, 23.5], [84.38, 23.8], [84.25, 23.85], [84.0, 23.75], [83.75, 23.85], [83.5, 23.75], [82.97, 23.97], [82.82, 24.32], [82.47, 24.47], [82.25, 25.0], [82.47, 25.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau", "S.Asia"]}, "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": [[[[82.47, 24.47], [82.25, 25.0], [82.47, 25.53], [82.82, 25.68], [82.85, 25.75], [82.75, 26.0], [82.97, 26.53], [83.5, 26.75], [83.75, 26.65], [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], [87.15, 25.75], [87.25, 25.5], [87.03, 24.97], [86.68, 24.82], [86.65, 24.75], [86.75, 24.5], [86.53, 23.97], [86.18, 23.82], [86.15, 23.75], [86.25, 23.5], [86.03, 22.97], [85.5, 22.75], [85.25, 22.85], [85.0, 22.75], [84.47, 22.97], [84.25, 23.5], [84.38, 23.8], [84.25, 23.85], [84.0, 23.75], [83.75, 23.85], [83.5, 23.75], [82.97, 23.97], [82.82, 24.32], [82.47, 24.47]]]]}, "2025-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.47, 24.47], [82.25, 25.0], [82.47, 25.53], [82.82, 25.68], [82.85, 25.75], [82.75, 26.0], [82.97, 26.53], [83.5, 26.75], [83.75, 26.65], [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], [87.15, 25.75], [87.25, 25.5], [87.03, 24.97], [86.68, 24.82], [86.65, 24.75], [86.75, 24.5], [86.53, 23.97], [86.18, 23.82], [86.15, 23.75], [86.25, 23.5], [86.03, 22.97], [85.5, 22.75], [85.25, 22.85], [85.0, 22.75], [84.47, 22.97], [84.25, 23.5], [84.38, 23.8], [84.25, 23.85], [84.0, 23.75], [83.75, 23.85], [83.5, 23.75], [82.97, 23.97], [82.82, 24.32], [82.47, 24.47]]]]}, "2025-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.47, 24.47], [82.25, 25.0], [82.47, 25.53], [82.82, 25.68], [82.85, 25.75], [82.75, 26.0], [82.97, 26.53], [83.5, 26.75], [83.75, 26.65], [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], [87.15, 25.75], [87.25, 25.5], [87.03, 24.97], [86.68, 24.82], [86.65, 24.75], [86.75, 24.5], [86.53, 23.97], [86.18, 23.82], [86.15, 23.75], [86.25, 23.5], [86.03, 22.97], [85.5, 22.75], [85.25, 22.85], [85.0, 22.75], [84.47, 22.97], [84.25, 23.5], [84.38, 23.8], [84.25, 23.85], [84.0, 23.75], [83.75, 23.85], [83.5, 23.75], [82.97, 23.97], [82.82, 24.32], [82.47, 24.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.7396484234959075}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.625001473470299}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.65470210108265, 26.649438695797983, 27.021043659078714]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.036260223388695, 24.608352915446005, 24.178918457031273]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.6410169804649968, -3.764844376443375, -3.469143063502525]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.642606930038312, -4.7396484234959075, -4.616884457090066]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8226922181604075, -1.8632790628997409, -1.6990920600315704]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.505890826648179, -2.4925660594072827, -2.099194793756176]}}