{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:45:38.288410", "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-19_to_2010-Sep-25_236.5_58.5"}, "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": 2010090000865}, "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 19 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 25 2010"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 247773.36064495586}, "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": 58.5}, "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": 236.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "236.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 231.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 242.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 56.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 65.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.53, 58.47], [-126.75, 59.0], [-126.53, 59.53], [-126.0, 59.75], [-125.75, 59.65], [-125.5, 59.75], [-125.25, 59.65], [-125.0, 59.75], [-124.47, 59.53], [-124.32, 59.18], [-124.0, 59.04], [-123.5, 59.25], [-122.97, 59.03], [-122.82, 58.68], [-122.47, 58.53], [-122.25, 58.0], [-122.35, 57.75], [-122.25, 57.5], [-122.47, 56.97], [-123.0, 56.75], [-123.25, 56.85], [-123.5, 56.75], [-124.03, 56.97], [-124.18, 57.32], [-124.53, 57.47], [-124.68, 57.82], [-125.03, 57.97], [-125.18, 58.32], [-125.25, 58.35], [-125.5, 58.25], [-125.75, 58.35], [-126.0, 58.25], [-126.53, 58.47]]]]}, "2010-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.75, 59.0], [-126.53, 59.53], [-126.0, 59.75], [-125.75, 59.65], [-125.5, 59.75], [-125.25, 59.65], [-125.0, 59.75], [-124.47, 59.53], [-124.32, 59.18], [-124.0, 59.04], [-123.5, 59.25], [-123.25, 59.15], [-123.0, 59.25], [-122.5, 59.04], [-122.0, 59.25], [-121.47, 59.03], [-121.32, 58.68], [-121.0, 58.54], [-120.5, 58.75], [-119.97, 58.53], [-119.75, 58.0], [-119.97, 57.47], [-120.37, 57.3], [-120.25, 57.0], [-120.47, 56.47], [-121.0, 56.25], [-121.53, 56.47], [-121.68, 56.82], [-122.03, 56.97], [-122.18, 57.32], [-122.25, 57.35], [-122.32, 57.32], [-122.47, 56.97], [-123.0, 56.75], [-123.25, 56.85], [-123.5, 56.75], [-123.75, 56.85], [-124.0, 56.75], [-124.53, 56.97], [-124.68, 57.32], [-125.03, 57.47], [-125.18, 57.82], [-125.25, 57.85], [-125.5, 57.75], [-126.03, 57.97], [-126.18, 58.32], [-126.53, 58.47], [-126.75, 59.0]]]]}, "2010-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.75, 59.0], [-126.53, 59.53], [-126.0, 59.75], [-125.75, 59.65], [-125.5, 59.75], [-125.25, 59.65], [-125.0, 59.75], [-124.7, 59.63], [-124.53, 60.03], [-124.0, 60.25], [-123.75, 60.15], [-123.5, 60.25], [-122.97, 60.03], [-122.75, 59.5], [-122.85, 59.25], [-122.82, 59.18], [-122.75, 59.15], [-122.5, 59.25], [-122.25, 59.15], [-122.0, 59.25], [-121.47, 59.03], [-121.32, 58.68], [-121.25, 58.65], [-121.0, 58.75], [-120.75, 58.65], [-120.5, 58.75], [-119.97, 58.53], [-119.75, 58.0], [-119.97, 57.47], [-120.37, 57.3], [-120.25, 57.0], [-120.47, 56.47], [-121.0, 56.25], [-121.53, 56.47], [-121.68, 56.82], [-122.03, 56.97], [-122.18, 57.32], [-122.25, 57.35], [-122.32, 57.32], [-122.47, 56.97], [-123.0, 56.75], [-123.25, 56.85], [-123.5, 56.75], [-123.75, 56.85], [-124.0, 56.75], [-124.53, 56.97], [-124.68, 57.32], [-125.03, 57.47], [-125.18, 57.82], [-125.25, 57.85], [-125.5, 57.75], [-126.03, 57.97], [-126.18, 58.32], [-126.53, 58.47], [-126.75, 59.0]]]]}, "2010-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.53, 60.03], [-125.18, 60.18], [-125.03, 60.53], [-124.68, 60.68], [-124.65, 60.75], [-124.75, 61.0], [-124.62, 61.3], [-125.03, 61.47], [-125.25, 62.0], [-125.03, 62.53], [-124.5, 62.75], [-124.25, 62.65], [-124.0, 62.75], [-123.75, 62.65], [-123.68, 62.68], [-123.65, 62.75], [-123.68, 62.82], [-124.03, 62.97], [-124.18, 63.32], [-124.53, 63.47], [-124.68, 63.82], [-124.75, 63.85], [-125.0, 63.75], [-125.53, 63.97], [-125.75, 64.5], [-125.53, 65.03], [-125.0, 65.25], [-124.75, 65.15], [-124.68, 65.18], [-124.53, 65.53], [-124.0, 65.75], [-123.75, 65.65], [-123.5, 65.75], [-123.25, 65.65], [-123.0, 65.75], [-122.75, 65.65], [-122.68, 65.68], [-122.53, 66.03], [-122.0, 66.25], [-121.47, 66.03], [-121.32, 65.68], [-121.25, 65.65], [-121.18, 65.68], [-121.03, 66.03], [-120.5, 66.25], [-119.97, 66.03], [-119.75, 65.5], [-119.87, 65.2], [-119.47, 65.03], [-119.3, 64.63], [-119.0, 64.75], [-118.75, 64.65], [-118.5, 64.75], [-117.97, 64.53], [-117.82, 64.18], [-117.47, 64.03], [-117.25, 63.5], [-117.47, 62.97], [-117.82, 62.82], [-117.85, 62.75], [-117.75, 62.5], [-117.87, 62.2], [-117.47, 62.03], [-117.25, 61.5], [-117.47, 60.97], [-118.0, 60.75], [-118.25, 60.85], [-118.5, 60.75], [-118.75, 60.85], [-119.0, 60.75], [-119.25, 60.85], [-119.5, 60.75], [-119.75, 60.85], [-120.0, 60.75], [-120.25, 60.85], [-120.32, 60.82], [-120.35, 60.75], [-120.25, 60.5], [-120.47, 59.97], [-121.0, 59.75], [-121.25, 59.85], [-121.32, 59.82], [-121.47, 59.47], [-121.82, 59.32], [-121.87, 59.2], [-121.47, 59.03], [-121.32, 58.68], [-121.25, 58.65], [-121.0, 58.75], [-120.75, 58.65], [-120.5, 58.75], [-119.97, 58.53], [-119.75, 58.0], [-119.97, 57.47], [-120.37, 57.3], [-120.25, 57.0], [-120.47, 56.47], [-121.0, 56.25], [-121.53, 56.47], [-121.68, 56.82], [-122.03, 56.97], [-122.18, 57.32], [-122.25, 57.35], [-122.5, 57.25], [-122.75, 57.35], [-123.0, 57.25], [-123.3, 57.38], [-123.47, 56.97], [-124.0, 56.75], [-124.53, 56.97], [-124.68, 57.32], [-125.03, 57.47], [-125.18, 57.82], [-125.25, 57.85], [-125.5, 57.75], [-126.03, 57.97], [-126.25, 58.5], [-126.03, 59.03], [-125.62, 59.2], [-125.75, 59.5], [-125.53, 60.03]]]]}, "2010-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-128.75, 60.5], [-128.53, 61.03], [-128.0, 61.25], [-127.75, 61.15], [-127.5, 61.25], [-127.25, 61.15], [-127.18, 61.18], [-127.15, 61.25], [-127.25, 61.5], [-127.15, 61.75], [-127.25, 62.0], [-127.03, 62.53], [-126.5, 62.75], [-126.25, 62.65], [-126.18, 62.68], [-126.15, 62.75], [-126.25, 63.0], [-126.03, 63.53], [-125.5, 63.75], [-125.25, 63.65], [-125.0, 63.75], [-125.53, 63.97], [-125.75, 64.5], [-125.53, 65.03], [-125.0, 65.25], [-124.75, 65.15], [-124.68, 65.18], [-124.53, 65.53], [-124.0, 65.75], [-123.75, 65.65], [-123.5, 65.75], [-123.25, 65.65], [-123.0, 65.75], [-122.75, 65.65], [-122.68, 65.68], [-122.53, 66.03], [-122.0, 66.25], [-121.47, 66.03], [-121.32, 65.68], [-121.25, 65.65], [-121.18, 65.68], [-121.03, 66.03], [-120.5, 66.25], [-119.97, 66.03], [-119.75, 65.5], [-119.87, 65.2], [-119.47, 65.03], [-119.3, 64.63], [-119.0, 64.75], [-118.75, 64.65], [-118.5, 64.75], [-117.97, 64.53], [-117.82, 64.18], [-117.47, 64.03], [-117.25, 63.5], [-117.47, 62.97], [-117.82, 62.82], [-117.85, 62.75], [-117.75, 62.5], [-117.87, 62.2], [-117.47, 62.03], [-117.25, 61.5], [-117.47, 60.97], [-118.0, 60.75], [-118.25, 60.85], [-118.5, 60.75], [-118.75, 60.85], [-119.0, 60.75], [-119.25, 60.85], [-119.5, 60.75], [-119.75, 60.85], [-120.0, 60.75], [-120.25, 60.85], [-120.32, 60.82], [-120.35, 60.75], [-120.25, 60.5], [-120.47, 59.97], [-121.0, 59.75], [-121.25, 59.85], [-121.32, 59.82], [-121.47, 59.47], [-121.82, 59.32], [-121.87, 59.2], [-121.47, 59.03], [-121.32, 58.68], [-121.25, 58.65], [-121.0, 58.75], [-120.75, 58.65], [-120.5, 58.75], [-119.97, 58.53], [-119.75, 58.0], [-119.97, 57.47], [-120.5, 57.25], [-120.75, 57.35], [-121.0, 57.25], [-121.25, 57.35], [-121.5, 57.25], [-121.75, 57.35], [-122.0, 57.25], [-122.25, 57.35], [-122.5, 57.25], [-122.75, 57.35], [-123.0, 57.25], [-123.53, 57.47], [-123.68, 57.82], [-124.03, 57.97], [-124.18, 58.32], [-124.53, 58.47], [-124.68, 58.82], [-124.75, 58.85], [-125.0, 58.75], [-125.53, 58.97], [-125.75, 59.5], [-125.57, 59.93], [-126.0, 59.75], [-126.25, 59.85], [-126.5, 59.75], [-126.75, 59.85], [-126.82, 59.82], [-126.97, 59.47], [-127.5, 59.25], [-128.03, 59.47], [-128.18, 59.82], [-128.53, 59.97], [-128.75, 60.5]], [[-124.57, 63.57], [-124.68, 63.82], [-124.75, 63.85], [-125.0, 63.75], [-124.57, 63.57]], [[-125.18, 60.32], [-125.25, 60.35], [-125.32, 60.32], [-125.43, 60.07], [-125.18, 60.18], [-125.15, 60.25], [-125.18, 60.32]]]]}, "2010-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-128.75, 60.5], [-128.53, 61.03], [-128.0, 61.25], [-127.75, 61.15], [-127.5, 61.25], [-127.25, 61.15], [-127.18, 61.18], [-127.15, 61.25], [-127.25, 61.5], [-127.15, 61.75], [-127.25, 62.0], [-127.03, 62.53], [-126.5, 62.75], [-126.25, 62.65], [-126.18, 62.68], [-126.15, 62.75], [-126.25, 63.0], [-126.03, 63.53], [-125.5, 63.75], [-125.25, 63.65], [-125.0, 63.75], [-125.53, 63.97], [-125.75, 64.5], [-125.53, 65.03], [-125.0, 65.25], [-124.75, 65.15], [-124.68, 65.18], [-124.53, 65.53], [-124.0, 65.75], [-123.75, 65.65], [-123.5, 65.75], [-123.25, 65.65], [-123.0, 65.75], [-122.75, 65.65], [-122.68, 65.68], [-122.53, 66.03], [-122.0, 66.25], [-121.47, 66.03], [-121.32, 65.68], [-121.25, 65.65], [-121.18, 65.68], [-121.03, 66.03], [-120.5, 66.25], [-119.97, 66.03], [-119.75, 65.5], [-119.87, 65.2], [-119.47, 65.03], [-119.3, 64.63], [-119.0, 64.75], [-118.75, 64.65], [-118.5, 64.75], [-117.97, 64.53], [-117.82, 64.18], [-117.47, 64.03], [-117.25, 63.5], [-117.47, 62.97], [-117.82, 62.82], [-117.85, 62.75], [-117.75, 62.5], [-117.87, 62.2], [-117.47, 62.03], [-117.25, 61.5], [-117.47, 60.97], [-118.0, 60.75], [-118.25, 60.85], [-118.5, 60.75], [-118.75, 60.85], [-119.0, 60.75], [-119.25, 60.85], [-119.5, 60.75], [-119.75, 60.85], [-120.0, 60.75], [-120.25, 60.85], [-120.32, 60.82], [-120.35, 60.75], [-120.25, 60.5], [-120.47, 59.97], [-121.0, 59.75], [-121.25, 59.85], [-121.32, 59.82], [-121.47, 59.47], [-121.82, 59.32], [-121.87, 59.2], [-121.47, 59.03], [-121.25, 58.5], [-121.47, 57.97], [-122.0, 57.75], [-122.25, 57.85], [-122.5, 57.75], [-122.75, 57.85], [-123.0, 57.75], [-123.25, 57.85], [-123.5, 57.75], [-124.03, 57.97], [-124.18, 58.32], [-124.53, 58.47], [-124.68, 58.82], [-124.75, 58.85], [-125.0, 58.75], [-125.53, 58.97], [-125.75, 59.5], [-125.57, 59.93], [-126.0, 59.75], [-126.25, 59.85], [-126.5, 59.75], [-126.75, 59.85], [-126.82, 59.82], [-126.97, 59.47], [-127.5, 59.25], [-128.03, 59.47], [-128.18, 59.82], [-128.53, 59.97], [-128.75, 60.5]], [[-124.57, 63.57], [-124.68, 63.82], [-124.75, 63.85], [-125.0, 63.75], [-124.57, 63.57]], [[-125.18, 60.32], [-125.25, 60.35], [-125.32, 60.32], [-125.43, 60.07], [-125.18, 60.18], [-125.15, 60.25], [-125.18, 60.32]]]]}, "2010-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-128.75, 60.5], [-128.53, 61.03], [-128.0, 61.25], [-127.75, 61.15], [-127.5, 61.25], [-127.25, 61.15], [-127.18, 61.18], [-127.15, 61.25], [-127.25, 61.5], [-127.15, 61.75], [-127.25, 62.0], [-127.03, 62.53], [-126.5, 62.75], [-126.25, 62.65], [-126.18, 62.68], [-126.15, 62.75], [-126.25, 63.0], [-126.03, 63.53], [-125.5, 63.75], [-125.25, 63.65], [-125.0, 63.75], [-124.5, 63.54], [-124.0, 63.75], [-123.75, 63.65], [-123.5, 63.75], [-123.25, 63.65], [-123.0, 63.75], [-122.75, 63.65], [-122.5, 63.75], [-121.97, 63.53], [-121.82, 63.18], [-121.75, 63.15], [-121.5, 63.25], [-121.25, 63.15], [-121.0, 63.25], [-120.47, 63.03], [-120.25, 62.5], [-120.47, 61.97], [-120.82, 61.82], [-120.85, 61.75], [-120.75, 61.5], [-120.85, 61.25], [-120.75, 61.0], [-120.97, 60.47], [-121.5, 60.25], [-121.75, 60.35], [-122.0, 60.25], [-122.25, 60.35], [-122.32, 60.32], [-122.35, 60.25], [-122.25, 60.0], [-122.47, 59.47], [-122.82, 59.32], [-122.85, 59.25], [-122.75, 59.0], [-122.97, 58.47], [-123.5, 58.25], [-124.03, 58.47], [-124.18, 58.82], [-124.25, 58.85], [-124.5, 58.75], [-125.03, 58.97], [-125.25, 59.5], [-125.15, 59.75], [-125.25, 60.0], [-125.15, 60.25], [-125.18, 60.32], [-125.25, 60.35], [-125.32, 60.32], [-125.47, 59.97], [-126.0, 59.75], [-126.25, 59.85], [-126.5, 59.75], [-126.75, 59.85], [-126.82, 59.82], [-126.97, 59.47], [-127.5, 59.25], [-128.03, 59.47], [-128.18, 59.82], [-128.53, 59.97], [-128.75, 60.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.431717238985925}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.0629344132014635}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.3405738167026584, -0.6150161507326857, -0.22068580019617912, 0.971835284123415, -0.7798344829228085, -0.7184130885810873, -0.9431167217318261]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.259909234343695, -6.184249571149564, -8.511184414009392, -4.831411606369841, -8.175829260526086, -7.695749342519946, -6.960078246254454]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.245811761540767, -6.18799508399203, -6.449086083961969, -5.576521683291523, -6.576872607237746, -6.15163749249047, -5.531254520477101]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.560173816823351, -7.371201175732608, -9.431717238985925, -6.811613968199026, -8.130035971575069, -7.7944926889114186, -7.29056192738841]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4452910919197983, -1.6566139348987738, -1.6839260812677974, -1.3430246737706668, -1.616699387061644, -1.5223762922694457, -1.4150319510847422]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.550615125521235, -1.9646063663595492, -2.47713472157639, -1.6266753442269317, -1.9822625376343628, -1.9114103901656474, -1.7746430893736815]}}