{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:58.804188", "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-Jan-19_to_2025-Jan-24_249.0_35.5"}, "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": 2025010000546}, "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": "January 19 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 24 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 60009.447623775966}, "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": 35.5}, "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": 249.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "249.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 248.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 251.0}, "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": [[[[-109.5, 37.75], [-108.97, 37.53], [-108.75, 37.0], [-108.85, 36.75], [-108.75, 36.5], [-108.97, 35.97], [-109.32, 35.82], [-109.35, 35.75], [-109.32, 35.68], [-109.25, 35.65], [-109.0, 35.75], [-108.47, 35.53], [-108.25, 35.0], [-108.47, 34.47], [-108.82, 34.32], [-108.97, 33.97], [-109.5, 33.75], [-109.75, 33.85], [-110.0, 33.75], [-110.53, 33.97], [-110.68, 34.32], [-110.75, 34.35], [-111.0, 34.25], [-111.53, 34.47], [-111.75, 35.0], [-111.65, 35.25], [-111.68, 35.32], [-112.03, 35.47], [-112.25, 36.0], [-112.15, 36.25], [-112.25, 36.5], [-112.15, 36.75], [-112.25, 37.0], [-112.03, 37.53], [-111.5, 37.75], [-111.2, 37.63], [-111.15, 37.75], [-111.25, 38.0], [-111.03, 38.53], [-110.5, 38.75], [-109.97, 38.53], [-109.75, 38.0], [-109.85, 37.75], [-109.82, 37.68], [-109.75, 37.65], [-109.5, 37.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America", "N.Central-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": 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{"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.200745739016833}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.469670554919162, -4.131345905977128, -7.315820651584147, -4.161988543081975, -3.662597125509535, -3.4536604764168715]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-6.572466278076149, -6.320042673746741, -8.867453002929665, -6.747310384114542, -5.909663899739542, -5.00847218831376]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.8792221796438575, -5.503890520853565, -8.723305034496372, -5.809794494136522, -5.360075592500698, -5.348756996450169]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.592897846807205, -6.699831456289132, -9.839622756372762, -7.7734567650712165, -6.693958263861077, -6.627505937212959]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5068432546404884, -1.4620679604134466, -2.421594035051234, -1.6594357372892916, -1.5596594301479687, -1.614507905536838]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7307920299908992, -1.8896829654105518, -2.8449542717541774, -2.207809136971044, -1.9496740347016026, -2.046903688918535]}}