{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:13:11.999226", "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": "2018-Jul-20_to_2018-Jul-22_238.0_71.5"}, "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": 2018070000916}, "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": "July 20 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 22 2018"}, "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": 82335.01931751017}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": ["The Northwestern Passages"]}, "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": 71.5}, "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": 238.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "238.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 234.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 244.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 71.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 74.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.03, 71.47], [-126.25, 72.0], [-126.03, 72.53], [-125.5, 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[-118.25, 71.35], [-118.5, 71.25], [-118.75, 71.35], [-119.0, 71.25], [-119.25, 71.35], [-119.5, 71.25], [-119.75, 71.35], [-120.0, 71.25], [-120.25, 71.35], [-120.32, 71.32], [-120.47, 70.97], [-121.0, 70.75], [-121.25, 70.85], [-121.5, 70.75], [-121.75, 70.85], [-122.0, 70.75], [-122.25, 70.85], [-122.5, 70.75], [-122.75, 70.85], [-123.0, 70.75], [-123.25, 70.85], [-123.5, 70.75], [-123.75, 70.85], [-124.0, 70.75], [-124.25, 70.85], [-124.5, 70.75], [-125.03, 70.97], [-125.18, 71.32], [-125.25, 71.35], [-125.5, 71.25], [-126.03, 71.47]]]]}, "2018-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.03, 71.47], [-126.25, 72.0], [-126.03, 72.53], [-125.5, 72.75], [-125.25, 72.65], [-125.18, 72.68], [-125.15, 72.75], [-125.25, 73.0], [-125.03, 73.53], [-124.68, 73.68], [-124.65, 73.75], [-124.75, 74.0], [-124.53, 74.53], [-124.0, 74.75], [-123.75, 74.65], [-123.5, 74.75], [-123.25, 74.65], [-123.0, 74.75], [-122.75, 74.65], [-122.5, 74.75], [-122.25, 74.65], 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anomaly recorded over entire duration", "value": -8.489242594457039}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.586893117031075}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.328812003687574, 0.8138190076198839, 1.4792917966441337]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.19171397194742212, -0.6210211423671694, 0.09485126775336994]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.606911403616002, -6.994935016952272, -6.158832930524962]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.366603061775265, -8.489242594457039, -7.743895690239697]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5873105818156745, -1.6761462290057507, -1.4933727701806792]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9683469013644261, -1.9680687797108891, -1.774560323894064]}}