{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:29.321299", "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-Nov-06_to_2018-Nov-09_251.0_54.0"}, "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": 2018110000258}, "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": "November 06 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 09 2018"}, "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": 56669.41524824826}, "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.E.North-America", "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": []}, "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": 54.0}, "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": 251.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "251.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 250.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 256.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-11-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.03, 54.53], [-109.5, 54.75], [-109.25, 54.65], [-109.0, 54.75], [-108.75, 54.65], [-108.5, 54.75], [-107.97, 54.53], [-107.75, 54.0], [-107.85, 53.75], [-107.75, 53.5], [-107.96, 53.0], [-107.75, 52.5], [-107.97, 51.97], [-108.5, 51.75], [-109.03, 51.97], [-109.25, 52.5], [-109.12, 52.8], [-109.53, 52.97], [-109.68, 53.32], [-110.03, 53.47], [-110.25, 54.0], [-110.03, 54.53]]], [[[-106.75, 54.0], [-106.53, 54.53], [-106.0, 54.75], [-105.75, 54.65], [-105.5, 54.75], [-104.97, 54.53], [-104.75, 54.0], [-104.97, 53.47], [-105.5, 53.25], [-105.75, 53.35], [-106.0, 53.25], [-106.53, 53.47], [-106.75, 54.0]]]]}, "2018-11-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.03, 54.53], [-109.5, 54.75], [-109.25, 54.65], [-109.0, 54.75], [-108.75, 54.65], [-108.5, 54.75], [-108.25, 54.65], [-108.18, 54.68], [-108.03, 55.03], [-107.5, 55.25], [-107.2, 55.13], [-107.03, 55.53], [-106.5, 55.75], [-105.97, 55.53], [-105.82, 55.18], [-105.75, 55.15], [-105.5, 55.25], [-104.97, 55.03], [-104.82, 54.68], [-104.5, 54.54], [-104.0, 54.75], [-103.47, 54.53], [-103.25, 54.0], [-103.47, 53.47], [-103.82, 53.32], [-103.97, 52.97], [-104.5, 52.75], [-104.75, 52.85], [-105.0, 52.75], [-105.3, 52.88], [-105.47, 52.47], [-106.0, 52.25], [-106.5, 52.46], [-107.0, 52.25], [-107.3, 52.38], [-107.47, 51.97], [-108.0, 51.75], [-108.25, 51.85], [-108.5, 51.75], [-109.03, 51.97], [-109.25, 52.5], [-109.12, 52.8], [-109.25, 52.85], [-109.5, 52.75], [-110.03, 52.97], [-110.25, 53.5], [-110.15, 53.75], [-110.25, 54.0], [-110.03, 54.53]]]]}, "2018-11-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.03, 54.53], [-109.5, 54.75], [-109.25, 54.65], [-109.0, 54.75], [-108.75, 54.65], [-108.5, 54.75], [-108.25, 54.65], [-108.18, 54.68], [-108.03, 55.03], [-107.5, 55.25], [-107.2, 55.13], [-107.03, 55.53], [-106.5, 55.75], [-105.97, 55.53], [-105.82, 55.18], [-105.75, 55.15], [-105.5, 55.25], [-104.97, 55.03], [-104.82, 54.68], [-104.5, 54.54], [-104.0, 54.75], [-103.47, 54.53], [-103.25, 54.0], [-103.47, 53.47], [-103.82, 53.32], [-103.97, 52.97], [-104.5, 52.75], [-104.75, 52.85], [-105.0, 52.75], [-105.3, 52.88], [-105.47, 52.47], [-106.0, 52.25], [-106.5, 52.46], [-107.0, 52.25], [-107.3, 52.38], [-107.47, 51.97], [-108.0, 51.75], [-108.25, 51.85], [-108.5, 51.75], [-109.03, 51.97], [-109.25, 52.5], [-109.12, 52.8], [-109.25, 52.85], [-109.5, 52.75], [-110.03, 52.97], [-110.25, 53.5], [-110.15, 53.75], [-110.25, 54.0], [-110.03, 54.53]]]]}, "2018-11-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-110.03, 54.53], [-109.5, 54.75], [-109.25, 54.65], [-109.0, 54.75], [-108.75, 54.65], [-108.5, 54.75], [-108.25, 54.65], [-108.18, 54.68], [-108.03, 55.03], [-107.5, 55.25], [-107.2, 55.13], [-107.03, 55.53], [-106.5, 55.75], [-105.97, 55.53], [-105.82, 55.18], [-105.75, 55.15], [-105.5, 55.25], [-104.97, 55.03], [-104.82, 54.68], [-104.5, 54.54], [-104.0, 54.75], [-103.47, 54.53], [-103.25, 54.0], [-103.47, 53.47], [-103.82, 53.32], [-103.97, 52.97], [-104.5, 52.75], [-104.75, 52.85], [-105.0, 52.75], [-105.3, 52.88], [-105.47, 52.47], [-106.0, 52.25], [-106.5, 52.46], [-107.0, 52.25], [-107.3, 52.38], [-107.47, 51.97], [-108.0, 51.75], [-108.25, 51.85], [-108.5, 51.75], [-109.03, 51.97], [-109.25, 52.5], [-109.12, 52.8], [-109.25, 52.85], [-109.5, 52.75], [-110.03, 52.97], [-110.25, 53.5], [-110.15, 53.75], [-110.25, 54.0], [-110.03, 54.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.150803801215886}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.604391579728023}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-11.887469177994149, -12.999633460954897, -13.98622944619376, -15.991031462834428]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-13.528212214768871, 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-2.1823209549033447]}}