{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:01.584819", "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": "2012-Dec-20_to_2012-Dec-27_243.5_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": 2012120000833}, "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": "December 20 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 27 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 98895.0544731377}, "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": 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": 243.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "243.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 238.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 249.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.53, 59.97], [-121.75, 60.5], [-121.53, 61.03], [-121.0, 61.25], [-120.75, 61.15], [-120.5, 61.25], [-119.97, 61.03], [-119.75, 60.5], [-119.97, 59.97], [-120.5, 59.75], [-120.75, 59.85], [-121.0, 59.75], [-121.53, 59.97]]]]}, "2012-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.53, 59.97], [-121.75, 60.5], [-121.53, 61.03], [-121.0, 61.25], [-120.75, 61.15], [-120.5, 61.25], [-119.97, 61.03], [-119.75, 60.5], [-119.97, 59.97], [-120.5, 59.75], [-120.75, 59.85], [-121.0, 59.75], [-121.53, 59.97]]]]}, "2012-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.53, 61.53], [-121.0, 61.75], [-120.75, 61.65], [-120.5, 61.75], [-120.25, 61.65], [-120.0, 61.75], [-119.75, 61.65], [-119.5, 61.75], [-118.97, 61.53], [-118.82, 61.18], [-118.75, 61.15], [-118.68, 61.18], [-118.53, 61.53], [-118.0, 61.75], [-117.5, 61.54], [-117.0, 61.75], [-116.75, 61.65], [-116.5, 61.75], [-116.25, 61.65], [-116.0, 61.75], [-115.47, 61.53], [-115.3, 61.13], [-115.0, 61.25], [-114.75, 61.15], [-114.5, 61.25], [-114.25, 61.15], [-114.0, 61.25], [-113.75, 61.15], [-113.5, 61.25], [-113.25, 61.15], [-113.0, 61.25], [-112.47, 61.03], [-112.25, 60.5], [-112.47, 59.97], [-113.0, 59.75], [-113.25, 59.85], [-113.32, 59.82], [-113.47, 59.47], [-114.0, 59.25], [-114.25, 59.35], [-114.5, 59.25], [-115.03, 59.47], [-115.18, 59.82], [-115.53, 59.97], [-115.7, 60.38], [-115.82, 60.32], [-115.97, 59.97], [-116.5, 59.75], [-116.75, 59.85], [-117.0, 59.75], [-117.25, 59.85], [-117.5, 59.75], [-118.0, 59.96], [-118.5, 59.75], [-118.75, 59.85], [-119.0, 59.75], [-119.25, 59.85], [-119.5, 59.75], [-119.75, 59.85], [-120.0, 59.75], [-120.25, 59.85], [-120.5, 59.75], [-120.75, 59.85], [-121.0, 59.75], [-121.53, 59.97], [-121.75, 60.5], [-121.65, 60.75], [-121.75, 61.0], [-121.53, 61.53]]]]}, "2012-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.75, 61.0], [-121.53, 61.53], [-121.0, 61.75], [-120.75, 61.65], [-120.5, 61.75], [-120.25, 61.65], [-120.0, 61.75], [-119.75, 61.65], [-119.5, 61.75], [-118.97, 61.53], [-118.82, 61.18], [-118.75, 61.15], [-118.68, 61.18], [-118.53, 61.53], [-118.0, 61.75], [-117.5, 61.54], [-117.0, 61.75], [-116.75, 61.65], [-116.5, 61.75], [-116.25, 61.65], [-116.0, 61.75], [-115.75, 61.65], [-115.5, 61.75], [-115.25, 61.65], [-115.0, 61.75], [-114.75, 61.65], [-114.5, 61.75], [-114.25, 61.65], [-114.0, 61.75], [-113.75, 61.65], [-113.68, 61.68], [-113.53, 62.03], [-113.0, 62.25], [-112.75, 62.15], [-112.5, 62.25], [-111.97, 62.03], [-111.75, 61.5], [-111.96, 61.0], [-111.82, 60.68], [-111.47, 60.53], [-111.25, 60.0], [-111.35, 59.75], [-111.25, 59.5], [-111.35, 59.25], [-111.32, 59.18], [-111.25, 59.15], [-111.0, 59.25], [-110.47, 59.03], [-110.25, 58.5], [-110.47, 57.97], [-111.0, 57.75], [-111.25, 57.85], [-111.5, 57.75], [-111.75, 57.85], [-112.0, 57.75], [-112.25, 57.85], [-112.5, 57.75], [-112.75, 57.85], [-112.82, 57.82], [-112.97, 57.47], [-113.5, 57.25], [-113.75, 57.35], [-114.0, 57.25], [-114.25, 57.35], [-114.5, 57.25], [-114.75, 57.35], [-114.82, 57.32], [-114.97, 56.97], [-115.5, 56.75], [-116.03, 56.97], [-116.18, 57.32], [-116.53, 57.47], [-116.75, 58.0], [-116.53, 58.53], [-116.0, 58.75], [-115.75, 58.65], [-115.5, 58.75], [-115.25, 58.65], [-115.0, 58.75], [-114.75, 58.65], [-114.68, 58.68], [-114.53, 59.03], [-114.18, 59.18], [-114.15, 59.25], [-114.18, 59.32], [-114.25, 59.35], [-114.5, 59.25], [-115.03, 59.47], [-115.18, 59.82], [-115.53, 59.97], [-115.68, 60.32], [-115.75, 60.35], [-115.82, 60.32], [-115.97, 59.97], [-116.5, 59.75], [-116.75, 59.85], [-117.0, 59.75], [-117.25, 59.85], [-117.5, 59.75], [-118.0, 59.96], [-118.5, 59.75], [-118.75, 59.85], [-119.0, 59.75], [-119.25, 59.85], [-119.5, 59.75], [-119.75, 59.85], [-120.0, 59.75], [-120.25, 59.85], [-120.5, 59.75], [-121.03, 59.97], [-121.18, 60.32], [-121.53, 60.47], [-121.75, 61.0]]]]}, "2012-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-121.53, 60.47], [-121.75, 61.0], [-121.53, 61.53], [-121.0, 61.75], [-120.75, 61.65], [-120.5, 61.75], [-120.25, 61.65], [-120.0, 61.75], [-119.75, 61.65], [-119.5, 61.75], [-118.97, 61.53], [-118.82, 61.18], [-118.75, 61.15], [-118.68, 61.18], [-118.53, 61.53], [-118.0, 61.75], [-117.5, 61.54], [-117.0, 61.75], [-116.75, 61.65], [-116.5, 61.75], [-116.25, 61.65], [-116.0, 61.75], [-115.75, 61.65], [-115.68, 61.68], [-115.53, 62.03], [-115.0, 62.25], [-114.75, 62.15], [-114.5, 62.25], [-114.25, 62.15], [-114.0, 62.25], [-113.5, 62.04], [-113.0, 62.25], [-112.75, 62.15], [-112.5, 62.25], [-111.97, 62.03], [-111.75, 61.5], [-111.96, 61.0], [-111.82, 60.68], [-111.47, 60.53], [-111.25, 60.0], [-111.35, 59.75], [-111.25, 59.5], [-111.35, 59.25], [-111.32, 59.18], [-111.25, 59.15], [-111.0, 59.25], [-110.47, 59.03], [-110.25, 58.5], [-110.47, 57.97], [-111.0, 57.75], [-111.25, 57.85], [-111.5, 57.75], [-111.75, 57.85], [-112.0, 57.75], [-112.25, 57.85], [-112.5, 57.75], [-112.75, 57.85], [-112.82, 57.82], [-112.97, 57.47], [-113.5, 57.25], [-113.75, 57.35], [-114.0, 57.25], [-114.25, 57.35], [-114.5, 57.25], [-114.75, 57.35], [-114.82, 57.32], [-114.97, 56.97], [-115.5, 56.75], [-116.03, 56.97], [-116.18, 57.32], [-116.53, 57.47], [-116.75, 58.0], [-116.53, 58.53], [-116.0, 58.75], [-115.75, 58.65], [-115.5, 58.75], [-115.25, 58.65], [-115.0, 58.75], [-114.75, 58.65], [-114.68, 58.68], [-114.53, 59.03], [-114.18, 59.18], [-114.15, 59.25], [-114.18, 59.32], [-114.25, 59.35], [-114.5, 59.25], [-115.03, 59.47], [-115.18, 59.82], [-115.53, 59.97], [-115.68, 60.32], [-115.75, 60.35], [-115.82, 60.32], [-115.97, 59.97], [-116.5, 59.75], [-116.75, 59.85], [-117.0, 59.75], [-117.25, 59.85], [-117.5, 59.75], [-118.0, 59.96], [-118.5, 59.75], [-118.75, 59.85], [-119.0, 59.75], [-119.25, 59.85], [-119.5, 59.75], [-119.75, 59.85], [-120.0, 59.75], [-120.53, 59.97], [-120.68, 60.32], [-120.75, 60.35], [-121.0, 60.25], [-121.53, 60.47]]]]}, "2012-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.03, 61.53], [-119.5, 61.75], [-119.0, 61.54], [-118.5, 61.75], [-118.25, 61.65], [-118.0, 61.75], [-117.75, 61.65], [-117.5, 61.75], [-117.25, 61.65], [-117.0, 61.75], [-116.75, 61.65], [-116.5, 61.75], [-116.25, 61.65], [-116.0, 61.75], [-115.75, 61.65], [-115.68, 61.68], [-115.53, 62.03], [-115.0, 62.25], [-114.75, 62.15], [-114.5, 62.25], [-114.25, 62.15], [-114.0, 62.25], [-113.5, 62.04], [-113.0, 62.25], [-112.75, 62.15], [-112.5, 62.25], [-111.97, 62.03], [-111.75, 61.5], [-111.96, 61.0], [-111.82, 60.68], [-111.47, 60.53], [-111.25, 60.0], [-111.35, 59.75], [-111.25, 59.5], [-111.35, 59.25], [-111.32, 59.18], [-111.25, 59.15], [-111.0, 59.25], [-110.47, 59.03], [-110.25, 58.5], [-110.47, 57.97], [-111.0, 57.75], [-111.25, 57.85], [-111.5, 57.75], [-111.75, 57.85], [-112.0, 57.75], [-112.25, 57.85], [-112.5, 57.75], [-112.75, 57.85], [-112.82, 57.82], [-112.97, 57.47], [-113.5, 57.25], [-113.75, 57.35], [-114.0, 57.25], [-114.25, 57.35], [-114.5, 57.25], [-114.75, 57.35], [-114.82, 57.32], [-114.97, 56.97], [-115.5, 56.75], [-116.03, 56.97], [-116.18, 57.32], [-116.53, 57.47], [-116.75, 58.0], [-116.53, 58.53], [-116.0, 58.75], [-115.75, 58.65], [-115.5, 58.75], [-115.25, 58.65], [-115.0, 58.75], [-114.75, 58.65], [-114.68, 58.68], [-114.53, 59.03], [-114.18, 59.18], [-114.15, 59.25], [-114.18, 59.32], [-114.25, 59.35], [-114.5, 59.25], [-115.03, 59.47], [-115.18, 59.82], [-115.53, 59.97], [-115.68, 60.32], [-115.75, 60.35], [-115.82, 60.32], [-115.97, 59.97], [-116.5, 59.75], [-116.75, 59.85], [-117.0, 59.75], [-117.25, 59.85], [-117.5, 59.75], [-118.0, 59.96], [-118.5, 59.75], [-118.75, 59.85], [-119.0, 59.75], [-119.25, 59.85], [-119.5, 59.75], [-120.03, 59.97], [-120.25, 60.5], [-120.15, 60.75], [-120.25, 61.0], [-120.03, 61.53]]]]}, "2012-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.25, 61.0], [-120.03, 61.53], [-119.5, 61.75], [-119.0, 61.54], [-118.5, 61.75], [-118.25, 61.65], [-118.0, 61.75], [-117.75, 61.65], [-117.5, 61.75], [-117.25, 61.65], [-117.0, 61.75], [-116.75, 61.65], [-116.5, 61.75], [-116.25, 61.65], [-116.0, 61.75], [-115.75, 61.65], [-115.68, 61.68], [-115.53, 62.03], [-115.0, 62.25], [-114.75, 62.15], [-114.5, 62.25], [-114.25, 62.15], [-114.0, 62.25], [-113.47, 62.03], [-113.32, 61.68], [-112.97, 61.53], [-112.75, 61.0], [-112.85, 60.75], [-112.82, 60.68], [-112.47, 60.53], [-112.25, 60.0], [-112.37, 59.7], [-111.97, 59.53], [-111.82, 59.18], [-111.47, 59.03], [-111.25, 58.5], [-111.47, 57.97], [-112.0, 57.75], [-112.25, 57.85], [-112.5, 57.75], [-112.75, 57.85], [-112.82, 57.82], [-112.97, 57.47], [-113.5, 57.25], [-113.75, 57.35], [-114.0, 57.25], [-114.25, 57.35], [-114.5, 57.25], [-114.75, 57.35], [-115.0, 57.25], [-115.53, 57.47], [-115.75, 58.0], [-115.53, 58.53], [-115.0, 58.75], [-114.75, 58.65], [-114.68, 58.68], [-114.53, 59.03], [-114.0, 59.25], [-114.25, 59.35], [-114.5, 59.25], [-115.03, 59.47], [-115.18, 59.82], [-115.53, 59.97], [-115.68, 60.32], [-115.75, 60.35], [-115.82, 60.32], [-115.97, 59.97], [-116.5, 59.75], [-116.75, 59.85], [-117.0, 59.75], [-117.53, 59.97], [-117.68, 60.32], [-117.75, 60.35], [-117.82, 60.32], [-117.97, 59.97], [-118.5, 59.75], [-118.75, 59.85], [-119.0, 59.75], [-119.53, 59.97], [-119.68, 60.32], [-120.03, 60.47], [-120.25, 61.0]], [[-113.75, 59.15], [-113.5, 59.25], [-113.75, 59.35], [-114.0, 59.25], [-113.75, 59.15]], [[-113.25, 59.15], [-113.18, 59.18], [-113.12, 59.3], [-113.25, 59.35], [-113.5, 59.25], [-113.25, 59.15]]]]}, "2012-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.53, 57.97], [-112.75, 58.5], [-112.53, 59.03], [-112.0, 59.25], [-111.47, 59.03], [-111.25, 58.5], [-111.47, 57.97], [-112.0, 57.75], [-112.53, 57.97]]], [[[-118.5, 61.75], [-118.25, 61.65], [-118.0, 61.75], [-117.75, 61.65], [-117.5, 61.75], [-117.25, 61.65], [-117.0, 61.75], [-116.75, 61.65], [-116.5, 61.75], [-116.25, 61.65], [-116.0, 61.75], [-115.47, 61.53], [-115.25, 61.0], [-115.47, 60.47], [-115.82, 60.32], [-115.97, 59.97], [-116.5, 59.75], [-117.03, 59.97], [-117.18, 60.32], [-117.25, 60.35], [-117.5, 60.25], [-117.75, 60.35], [-117.82, 60.32], [-117.97, 59.97], [-118.5, 59.75], [-119.03, 59.97], [-119.25, 60.5], [-119.15, 60.75], [-119.25, 61.0], [-119.03, 61.53], [-118.5, 61.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -17.882298606741017}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -12.833844750764841}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-27.4638199439687, -26.776131914517606, -28.80463521739975, -31.926462775048606, -30.866969320491364, -31.646309101209056, -31.152493148418813, -30.98695933808378]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-28.058635685832286, -27.030858350537045, -30.91277327609211, -36.63124729375929, -35.365892936963405, -34.89541918224219, -34.52665437880145, -32.47640869193171]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.959120504152892, -9.956817786204539, -10.6741430556104, -14.19062048710364, -12.836322942681514, -13.179892319400546, -12.251653261230208, -11.274398641355301]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.264954983905483, -9.994486447989942, -12.173969664281032, -17.882298606741017, -16.283035885186422, -16.82076061205055, -15.133438005068172, -11.788734119743339]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3426428832206607, -1.329036916957187, -1.342298036687726, -1.709149313719869, -1.569782908149435, -1.604758814214767, -1.536876213459896, -1.4517158482004358]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3473368187448498, -1.3716020547014494, -1.4741930684763647, -2.113547714787191, -1.9327042635136815, -1.817196543360263, -1.8535116327523413, -1.5591798231638052]}}