{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:45:38.112760", "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": "2010-Sep-17_to_2010-Sep-21_252.5_53.5"}, "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": 2010090000793}, "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": "September 17 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 21 2010"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 91190.38042532007}, "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": 53.5}, "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": 252.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "252.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 252.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 258.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.04, 53.0], [-108.25, 53.5], [-108.03, 54.03], [-107.5, 54.25], [-107.25, 54.15], [-107.0, 54.25], [-106.75, 54.15], [-106.5, 54.25], [-105.97, 54.03], [-105.8, 53.63], [-105.5, 53.75], [-105.25, 53.65], [-105.0, 53.75], [-104.75, 53.65], [-104.5, 53.75], [-104.25, 53.65], [-104.0, 53.75], [-103.75, 53.65], [-103.5, 53.75], [-102.97, 53.53], [-102.82, 53.18], [-102.47, 53.03], [-102.32, 52.68], [-102.25, 52.65], [-102.0, 52.75], [-101.47, 52.53], [-101.25, 52.0], [-101.35, 51.75], [-101.32, 51.68], [-100.97, 51.53], [-100.75, 51.0], [-100.97, 50.47], [-101.5, 50.25], [-101.75, 50.35], [-102.0, 50.25], [-102.25, 50.35], [-102.5, 50.25], [-102.75, 50.35], [-103.0, 50.25], [-103.25, 50.35], [-103.5, 50.25], [-103.75, 50.35], [-104.0, 50.25], [-104.25, 50.35], [-104.5, 50.25], [-104.75, 50.35], [-105.0, 50.25], [-105.53, 50.47], [-105.68, 50.82], [-105.75, 50.85], [-106.0, 50.75], [-106.53, 50.97], [-106.68, 51.32], [-106.75, 51.35], [-107.0, 51.25], [-107.25, 51.35], [-107.5, 51.25], [-108.03, 51.47], [-108.25, 52.0], [-108.15, 52.25], [-108.25, 52.5], [-108.04, 53.0]]]]}, "2010-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.04, 53.0], [-108.25, 53.5], [-108.03, 54.03], [-107.5, 54.25], [-107.25, 54.15], [-107.0, 54.25], [-106.75, 54.15], [-106.5, 54.25], [-105.97, 54.03], [-105.8, 53.63], [-105.5, 53.75], [-105.25, 53.65], [-105.0, 53.75], [-104.75, 53.65], [-104.5, 53.75], [-104.25, 53.65], [-104.0, 53.75], [-103.75, 53.65], [-103.5, 53.75], [-102.97, 53.53], [-102.82, 53.18], [-102.47, 53.03], [-102.32, 52.68], [-102.25, 52.65], [-102.0, 52.75], [-101.47, 52.53], [-101.25, 52.0], [-101.35, 51.75], [-101.32, 51.68], [-100.97, 51.53], [-100.75, 51.0], [-100.97, 50.47], [-101.5, 50.25], [-101.75, 50.35], [-102.0, 50.25], [-102.25, 50.35], [-102.5, 50.25], [-102.75, 50.35], [-103.0, 50.25], [-103.25, 50.35], [-103.5, 50.25], [-103.75, 50.35], [-104.0, 50.25], [-104.25, 50.35], [-104.5, 50.25], [-104.75, 50.35], [-105.0, 50.25], [-105.53, 50.47], [-105.68, 50.82], [-105.75, 50.85], [-106.0, 50.75], [-106.53, 50.97], [-106.68, 51.32], [-106.75, 51.35], [-107.0, 51.25], [-107.25, 51.35], [-107.5, 51.25], [-108.03, 51.47], [-108.25, 52.0], [-108.15, 52.25], [-108.25, 52.5], [-108.04, 53.0]]]]}, "2010-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.04, 53.0], [-108.25, 53.5], [-108.03, 54.03], [-107.5, 54.25], [-107.25, 54.15], [-107.0, 54.25], [-106.75, 54.15], [-106.5, 54.25], [-105.97, 54.03], [-105.8, 53.63], [-105.5, 53.75], [-105.25, 53.65], [-105.0, 53.75], [-104.75, 53.65], [-104.5, 53.75], [-104.25, 53.65], [-104.0, 53.75], [-103.75, 53.65], [-103.5, 53.75], [-102.97, 53.53], [-102.82, 53.18], [-102.47, 53.03], [-102.32, 52.68], [-102.25, 52.65], [-102.0, 52.75], [-101.47, 52.53], [-101.25, 52.0], [-101.35, 51.75], [-101.32, 51.68], [-100.97, 51.53], [-100.75, 51.0], [-100.97, 50.47], [-101.5, 50.25], [-101.75, 50.35], [-102.0, 50.25], [-102.25, 50.35], [-102.5, 50.25], [-102.75, 50.35], [-103.0, 50.25], [-103.25, 50.35], [-103.5, 50.25], [-103.75, 50.35], [-104.0, 50.25], [-104.25, 50.35], [-104.5, 50.25], [-104.75, 50.35], [-105.0, 50.25], [-105.53, 50.47], [-105.68, 50.82], [-105.75, 50.85], [-106.0, 50.75], [-106.53, 50.97], [-106.68, 51.32], [-106.75, 51.35], [-107.0, 51.25], [-107.25, 51.35], [-107.5, 51.25], [-108.03, 51.47], [-108.25, 52.0], [-108.15, 52.25], [-108.25, 52.5], [-108.04, 53.0]]]]}, "2010-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.5, 54.25], [-106.97, 54.03], [-106.75, 53.5], [-106.97, 52.97], [-107.5, 52.75], [-108.03, 52.97], [-108.25, 53.5], [-108.03, 54.03], [-107.5, 54.25]]]]}, "2010-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.5, 54.25], [-106.97, 54.03], [-106.75, 53.5], [-106.97, 52.97], [-107.5, 52.75], [-108.03, 52.97], [-108.25, 53.5], [-108.03, 54.03], [-107.5, 54.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.064831831695528}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.35753626326182}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.398684045016637, 4.188307045303588, 4.657174665459763, 3.5500262798431095, 3.5909712621891003]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.6112813657632046, 3.2215215368676695, 3.422230690713434, 3.5500262798431095, 3.5909712621891003]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.20402134048843, -6.3261086280001875, -5.572836297445558, -5.601097966446389, -5.656815704939561]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.064831831695528, -7.3212811455811675, -5.992683394885262, -5.601097966446389, -5.656815704939561]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7981092072505682, -1.6155743873209643, -1.39641812311005, -1.3338095811190875, -1.3827578347062377]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9587171120308018, -1.8752409603550577, -1.545612740457584, -1.3338095811190875, -1.3827578347062377]}}