{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:45:38.436298", "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-20_to_2010-Sep-23_236.0_53.0"}, "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": 2010090000919}, "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 20 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 23 2010"}, "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": 57815.29256307206}, "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": []}, "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": 53.0}, "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": 236.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "236.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 233.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 238.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-127.25, 53.0], [-127.03, 53.53], [-126.68, 53.68], [-126.53, 54.03], [-126.0, 54.25], [-125.47, 54.03], [-125.32, 53.68], [-125.25, 53.65], [-125.18, 53.68], [-125.03, 54.03], [-124.5, 54.25], [-124.25, 54.15], [-124.18, 54.18], [-124.03, 54.53], [-123.5, 54.75], [-123.0, 54.54], [-122.5, 54.75], [-122.25, 54.65], [-122.0, 54.75], [-121.47, 54.53], [-121.25, 54.0], [-121.35, 53.75], [-121.25, 53.5], [-121.47, 52.97], [-121.82, 52.82], [-121.85, 52.75], [-121.75, 52.5], [-121.97, 51.97], [-122.32, 51.82], [-122.47, 51.47], [-123.0, 51.25], [-123.25, 51.35], [-123.5, 51.25], [-123.75, 51.35], [-124.0, 51.25], [-124.25, 51.35], [-124.5, 51.25], [-124.75, 51.35], [-125.0, 51.25], [-125.25, 51.35], [-125.5, 51.25], [-126.03, 51.47], [-126.18, 51.82], [-126.53, 51.97], [-126.68, 52.32], [-127.03, 52.47], [-127.25, 53.0]]]]}, "2010-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-127.25, 53.0], [-127.03, 53.53], [-126.68, 53.68], [-126.53, 54.03], [-126.0, 54.25], [-125.47, 54.03], [-125.32, 53.68], [-125.25, 53.65], [-125.18, 53.68], [-125.03, 54.03], [-124.5, 54.25], [-124.25, 54.15], [-124.18, 54.18], [-124.03, 54.53], [-123.5, 54.75], [-123.0, 54.54], [-122.5, 54.75], [-122.25, 54.65], [-122.0, 54.75], [-121.47, 54.53], [-121.25, 54.0], [-121.35, 53.75], [-121.25, 53.5], [-121.47, 52.97], [-121.82, 52.82], [-121.85, 52.75], [-121.75, 52.5], [-121.97, 51.97], [-122.32, 51.82], [-122.47, 51.47], [-123.0, 51.25], [-123.25, 51.35], [-123.5, 51.25], [-123.75, 51.35], [-124.0, 51.25], [-124.25, 51.35], [-124.5, 51.25], [-124.75, 51.35], [-125.0, 51.25], [-125.25, 51.35], [-125.5, 51.25], [-126.03, 51.47], [-126.18, 51.82], [-126.53, 51.97], [-126.68, 52.32], [-127.03, 52.47], [-127.25, 53.0]]]]}, "2010-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-127.25, 53.0], [-127.03, 53.53], [-126.68, 53.68], [-126.53, 54.03], [-126.0, 54.25], [-125.47, 54.03], [-125.32, 53.68], [-125.25, 53.65], [-125.18, 53.68], [-125.03, 54.03], [-124.5, 54.25], [-124.25, 54.15], [-124.18, 54.18], [-124.03, 54.53], [-123.5, 54.75], [-123.0, 54.54], [-122.5, 54.75], [-122.25, 54.65], [-122.0, 54.75], [-121.47, 54.53], [-121.25, 54.0], [-121.35, 53.75], [-121.25, 53.5], [-121.47, 52.97], [-121.82, 52.82], [-121.85, 52.75], [-121.75, 52.5], [-121.97, 51.97], [-122.32, 51.82], [-122.47, 51.47], [-123.0, 51.25], [-123.25, 51.35], [-123.5, 51.25], [-123.75, 51.35], [-124.0, 51.25], [-124.25, 51.35], [-124.5, 51.25], [-124.75, 51.35], [-125.0, 51.25], [-125.25, 51.35], [-125.5, 51.25], [-126.03, 51.47], [-126.18, 51.82], [-126.53, 51.97], [-126.68, 52.32], [-127.03, 52.47], [-127.25, 53.0]]]]}, "2010-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.53, 52.97], [-126.75, 53.5], [-126.53, 54.03], [-126.0, 54.25], [-125.47, 54.03], [-125.25, 53.5], [-125.47, 52.97], [-126.0, 52.75], [-126.53, 52.97]]], [[[-124.25, 54.15], [-124.0, 54.25], [-123.75, 54.15], [-123.5, 54.25], [-123.2, 54.13], [-123.03, 54.53], [-122.5, 54.75], [-122.25, 54.65], [-122.0, 54.75], [-121.47, 54.53], [-121.25, 54.0], [-121.47, 53.47], [-122.0, 53.25], [-122.25, 53.35], [-122.5, 53.25], [-122.8, 53.38], [-122.97, 52.97], [-123.32, 52.82], [-123.47, 52.47], [-124.0, 52.25], [-124.53, 52.47], [-124.68, 52.82], [-125.03, 52.97], [-125.25, 53.5], [-125.03, 54.03], [-124.5, 54.25], [-124.25, 54.15]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.069530474731437}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.860258752361226}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.669478018376253, 1.1326975144197036, 3.119021920392072, 3.9673726356121506]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.8491535116740465, -2.027625199881129, -1.7179394007147835, 3.23577354033813]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.54122585204334, -7.120967773561961, -5.146796924449444, -4.849595454917911]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.004725907648492, -9.069530474731437, -7.475527150941275, -5.425807583971391]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7013794328943725, -2.159805555817505, -1.5800511562057682, -1.521237738457042]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0054742416520557, -2.5349841030694176, -2.2902774630629303, -1.6938010962994112]}}