{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:11.173080", "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": "2022-May-17_to_2022-May-20_232.5_51.0"}, "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": 2022050000684}, "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": "May 17 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 20 2022"}, "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": 80712.65581979674}, "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": ["Canada"]}, "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": 51.0}, "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": 232.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "232.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 232.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 238.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-127.25, 51.65], [-127.0, 51.75], [-126.75, 51.65], [-126.5, 51.75], [-126.25, 51.65], [-126.18, 51.68], [-126.03, 52.03], [-125.5, 52.25], [-125.25, 52.15], [-125.0, 52.25], [-124.75, 52.15], [-124.5, 52.25], [-123.97, 52.03], [-123.82, 51.68], [-123.75, 51.65], [-123.5, 51.75], [-123.25, 51.65], [-123.0, 51.75], [-122.75, 51.65], [-122.5, 51.75], [-121.97, 51.53], [-121.82, 51.18], [-121.47, 51.03], [-121.32, 50.68], [-120.97, 50.53], [-120.75, 50.0], [-120.97, 49.47], [-121.5, 49.25], [-121.75, 49.35], [-122.0, 49.25], [-122.25, 49.35], [-122.5, 49.25], [-122.75, 49.35], [-123.0, 49.25], [-123.25, 49.35], [-123.32, 49.32], [-123.47, 48.97], [-124.0, 48.75], [-124.25, 48.85], [-124.5, 48.75], [-124.75, 48.85], [-125.0, 48.75], [-125.5, 48.96], [-126.0, 48.75], [-126.25, 48.85], [-126.5, 48.75], [-126.75, 48.85], [-127.0, 48.75], [-127.53, 48.97], [-127.75, 49.5], [-127.65, 49.75], [-127.68, 49.82], [-128.03, 49.97], [-128.25, 50.5], [-128.15, 50.75], [-128.25, 51.0], [-128.03, 51.53], [-127.5, 51.75], [-127.25, 51.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-128.25, 51.0], [-128.03, 51.53], [-127.5, 51.75], [-127.25, 51.65], [-127.0, 51.75], [-126.75, 51.65], [-126.5, 51.75], [-126.25, 51.65], [-126.18, 51.68], [-126.03, 52.03], [-125.5, 52.25], [-125.25, 52.15], [-125.0, 52.25], [-124.75, 52.15], [-124.5, 52.25], [-123.97, 52.03], [-123.82, 51.68], [-123.75, 51.65], [-123.5, 51.75], [-123.25, 51.65], [-123.0, 51.75], [-122.75, 51.65], [-122.5, 51.75], [-121.97, 51.53], [-121.82, 51.18], [-121.47, 51.03], [-121.32, 50.68], [-120.97, 50.53], [-120.75, 50.0], [-120.97, 49.47], [-121.5, 49.25], [-121.75, 49.35], [-122.0, 49.25], [-122.25, 49.35], [-122.5, 49.25], [-122.75, 49.35], [-123.0, 49.25], [-123.25, 49.35], [-123.32, 49.32], [-123.47, 48.97], [-124.0, 48.75], [-124.25, 48.85], [-124.5, 48.75], [-124.75, 48.85], [-125.0, 48.75], [-125.5, 48.96], [-126.0, 48.75], [-126.25, 48.85], [-126.5, 48.75], [-126.75, 48.85], [-127.0, 48.75], [-127.53, 48.97], [-127.75, 49.5], [-127.65, 49.75], [-127.68, 49.82], [-128.03, 49.97], [-128.25, 50.5], [-128.15, 50.75], [-128.25, 51.0]]]]}, "2022-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-128.25, 51.0], [-128.03, 51.53], [-127.5, 51.75], [-127.25, 51.65], [-127.0, 51.75], [-126.75, 51.65], [-126.5, 51.75], [-126.25, 51.65], [-126.18, 51.68], [-126.03, 52.03], [-125.5, 52.25], [-125.25, 52.15], [-125.0, 52.25], [-124.75, 52.15], [-124.5, 52.25], [-123.97, 52.03], [-123.82, 51.68], [-123.75, 51.65], [-123.5, 51.75], [-123.25, 51.65], [-123.0, 51.75], [-122.75, 51.65], [-122.5, 51.75], [-121.97, 51.53], [-121.82, 51.18], [-121.47, 51.03], [-121.32, 50.68], [-120.97, 50.53], [-120.75, 50.0], [-120.97, 49.47], [-121.5, 49.25], [-121.75, 49.35], [-122.0, 49.25], [-122.25, 49.35], [-122.5, 49.25], [-122.75, 49.35], [-123.0, 49.25], [-123.25, 49.35], [-123.32, 49.32], [-123.47, 48.97], [-124.0, 48.75], [-124.25, 48.85], [-124.5, 48.75], [-124.75, 48.85], [-125.0, 48.75], [-125.5, 48.96], [-126.0, 48.75], [-126.25, 48.85], [-126.5, 48.75], [-126.75, 48.85], [-127.0, 48.75], [-127.53, 48.97], [-127.75, 49.5], [-127.65, 49.75], [-127.68, 49.82], [-128.03, 49.97], [-128.25, 50.5], [-128.15, 50.75], [-128.25, 51.0]]]]}, "2022-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-128.25, 51.0], [-128.03, 51.53], [-127.5, 51.75], [-127.25, 51.65], [-127.0, 51.75], [-126.75, 51.65], [-126.5, 51.75], [-126.25, 51.65], [-126.18, 51.68], [-126.03, 52.03], [-125.5, 52.25], [-125.25, 52.15], [-125.0, 52.25], [-124.75, 52.15], [-124.5, 52.25], [-123.97, 52.03], [-123.82, 51.68], [-123.75, 51.65], [-123.5, 51.75], [-123.25, 51.65], [-123.0, 51.75], [-122.75, 51.65], [-122.5, 51.75], [-121.97, 51.53], [-121.82, 51.18], [-121.47, 51.03], [-121.32, 50.68], [-120.97, 50.53], [-120.75, 50.0], [-120.97, 49.47], [-121.5, 49.25], [-121.75, 49.35], [-122.0, 49.25], [-122.25, 49.35], [-122.5, 49.25], [-122.75, 49.35], [-123.0, 49.25], [-123.25, 49.35], [-123.32, 49.32], [-123.47, 48.97], [-124.0, 48.75], [-124.25, 48.85], [-124.5, 48.75], [-124.75, 48.85], [-125.0, 48.75], [-125.5, 48.96], [-126.0, 48.75], [-126.25, 48.85], [-126.5, 48.75], [-126.75, 48.85], [-127.0, 48.75], [-127.53, 48.97], [-127.75, 49.5], [-127.65, 49.75], [-127.68, 49.82], [-128.03, 49.97], [-128.25, 50.5], [-128.15, 50.75], [-128.25, 51.0]]]]}, "2022-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-128.03, 51.53], [-127.5, 51.75], [-126.97, 51.53], [-126.75, 51.0], [-126.97, 50.47], [-127.5, 50.25], [-128.03, 50.47], [-128.25, 51.0], [-128.03, 51.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.046745706269348}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7120439439382515}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.034554346071104, 3.794566763467344, 3.275178738687032, 8.211322289434236]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-3.5273384566712025, -2.1014763596112402, -2.6827461136577426, 8.211322289434236]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.029864048190849, -3.311806603287349, -3.8456159589728185, -1.6146980198514598]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.924667529737405, -4.5970819676417705, -5.046745706269348, -1.6146980198514598]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.624035807898526, -1.3629704913772611, -1.6357679469676796, -1.3009048765783833]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.12186370962959, -1.60484140629309, -2.0128928509583077, -1.3009048765783833]}}