{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:30:18.861425", "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-Mar-25_to_2022-Mar-27_257.5_60.5"}, "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": 2022030000833}, "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": "March 25 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 27 2022"}, "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": 50889.67848818682}, "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"]}, "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": 60.5}, "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": 257.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "257.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 255.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 259.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 63.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.25, 62.5], [-105.03, 63.03], [-104.5, 63.25], [-103.97, 63.03], [-103.82, 62.68], [-103.75, 62.65], [-103.5, 62.75], [-103.25, 62.65], [-103.18, 62.68], [-103.03, 63.03], [-102.68, 63.18], [-102.53, 63.53], [-102.0, 63.75], [-101.75, 63.65], [-101.5, 63.75], [-101.25, 63.65], [-101.0, 63.75], [-100.47, 63.53], [-100.25, 63.0], [-100.35, 62.75], [-100.25, 62.5], [-100.47, 61.97], [-100.82, 61.82], [-100.97, 61.47], [-101.37, 61.3], [-101.32, 61.18], [-101.25, 61.15], [-101.0, 61.25], [-100.47, 61.03], [-100.25, 60.5], [-100.35, 60.25], [-100.32, 60.18], [-99.97, 60.03], [-99.75, 59.5], [-99.85, 59.25], [-99.75, 59.0], [-99.97, 58.47], [-100.5, 58.25], [-101.0, 58.46], [-101.32, 58.32], [-101.47, 57.97], [-102.0, 57.75], [-102.25, 57.85], [-102.5, 57.75], [-103.03, 57.97], [-103.25, 58.5], [-103.03, 59.03], [-102.68, 59.18], [-102.65, 59.25], [-102.75, 59.5], [-102.62, 59.8], [-103.03, 59.97], [-103.18, 60.32], [-103.53, 60.47], [-103.68, 60.82], [-104.03, 60.97], [-104.18, 61.32], [-104.53, 61.47], [-104.68, 61.82], [-105.03, 61.97], [-105.25, 62.5]]]]}, "2022-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.25, 62.5], [-105.03, 63.03], [-104.5, 63.25], [-103.97, 63.03], [-103.82, 62.68], [-103.75, 62.65], [-103.5, 62.75], [-103.25, 62.65], [-103.18, 62.68], [-103.03, 63.03], [-102.68, 63.18], [-102.53, 63.53], [-102.0, 63.75], [-101.75, 63.65], [-101.5, 63.75], [-101.25, 63.65], [-101.0, 63.75], [-100.47, 63.53], [-100.25, 63.0], [-100.35, 62.75], [-100.25, 62.5], [-100.47, 61.97], [-100.82, 61.82], [-100.97, 61.47], [-101.37, 61.3], [-101.32, 61.18], [-101.25, 61.15], [-101.0, 61.25], [-100.47, 61.03], [-100.25, 60.5], [-100.35, 60.25], [-100.32, 60.18], [-99.97, 60.03], [-99.75, 59.5], [-99.85, 59.25], [-99.75, 59.0], [-99.97, 58.47], [-100.5, 58.25], [-101.0, 58.46], [-101.32, 58.32], [-101.47, 57.97], [-102.0, 57.75], [-102.25, 57.85], [-102.5, 57.75], [-103.03, 57.97], [-103.25, 58.5], [-103.03, 59.03], [-102.68, 59.18], [-102.65, 59.25], [-102.75, 59.5], [-102.62, 59.8], [-103.03, 59.97], [-103.18, 60.32], [-103.53, 60.47], [-103.68, 60.82], [-104.03, 60.97], [-104.18, 61.32], [-104.53, 61.47], [-104.68, 61.82], [-105.03, 61.97], [-105.25, 62.5]]]]}, "2022-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.25, 62.5], [-105.03, 63.03], [-104.5, 63.25], [-103.97, 63.03], [-103.82, 62.68], [-103.75, 62.65], [-103.5, 62.75], [-103.25, 62.65], [-103.18, 62.68], [-103.03, 63.03], [-102.68, 63.18], [-102.53, 63.53], [-102.0, 63.75], [-101.75, 63.65], [-101.5, 63.75], [-101.25, 63.65], [-101.0, 63.75], [-100.47, 63.53], [-100.25, 63.0], [-100.35, 62.75], [-100.25, 62.5], [-100.47, 61.97], [-100.82, 61.82], [-100.97, 61.47], [-101.37, 61.3], [-101.32, 61.18], [-101.25, 61.15], [-101.0, 61.25], [-100.47, 61.03], [-100.25, 60.5], [-100.35, 60.25], [-100.32, 60.18], [-99.97, 60.03], [-99.75, 59.5], [-99.85, 59.25], [-99.75, 59.0], [-99.97, 58.47], [-100.5, 58.25], [-101.0, 58.46], [-101.32, 58.32], [-101.47, 57.97], [-102.0, 57.75], [-102.25, 57.85], [-102.5, 57.75], [-103.03, 57.97], [-103.25, 58.5], [-103.03, 59.03], [-102.68, 59.18], [-102.65, 59.25], [-102.75, 59.5], [-102.62, 59.8], [-103.03, 59.97], [-103.18, 60.32], [-103.53, 60.47], [-103.68, 60.82], [-104.03, 60.97], [-104.18, 61.32], [-104.53, 61.47], [-104.68, 61.82], [-105.03, 61.97], [-105.25, 62.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -15.613787848229293}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.82117850535505}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-27.442979450988474, -29.68293140596691, -25.729331286935576]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-31.04136382718397, -31.16100076987388, -28.007763166582208]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.325227257165748, -13.925352990796357, -10.212955268103041]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-13.422872533234198, -15.613787848229293, -11.303123425727591]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.561669046454117, -1.8800244799208523, -1.3708215367659287]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7764812949660633, -2.2239298263762586, -1.4606643747624497]}}