{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:45:24.636832", "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-Aug-13_to_2010-Aug-18_261.5_69.0"}, "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": 2010080000651}, "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": "August 13 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 18 2010"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 74382.78770153348}, "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": ["The Northwestern Passages"]}, "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": 69.0}, "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": 261.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "261.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 255.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 266.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 65.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 71.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.53, 68.47], [-99.75, 69.0], [-99.53, 69.53], [-99.0, 69.75], [-98.75, 69.65], [-98.68, 69.68], [-98.53, 70.03], [-98.0, 70.25], [-97.75, 70.15], [-97.5, 70.25], [-96.97, 70.03], [-96.82, 69.68], [-96.47, 69.53], [-96.25, 69.0], [-96.47, 68.47], [-96.82, 68.32], [-96.97, 67.97], [-97.5, 67.75], [-97.75, 67.85], [-98.0, 67.75], [-98.53, 67.97], [-98.68, 68.32], [-98.75, 68.35], [-99.0, 68.25], [-99.53, 68.47]]]]}, "2010-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-99.18, 70.18], [-99.03, 70.53], [-98.5, 70.75], [-97.97, 70.53], [-97.82, 70.18], [-97.75, 70.15], [-97.5, 70.25], [-97.25, 70.15], [-97.0, 70.25], [-96.47, 70.03], [-96.32, 69.68], [-95.97, 69.53], [-95.75, 69.0], [-95.96, 68.5], [-95.75, 68.0], [-95.85, 67.75], [-95.82, 67.68], [-95.75, 67.65], [-95.5, 67.75], [-95.25, 67.65], [-95.18, 67.68], [-95.03, 68.03], [-94.5, 68.25], [-94.25, 68.15], [-94.0, 68.25], [-93.47, 68.03], [-93.25, 67.5], [-93.35, 67.25], [-93.32, 67.18], [-92.97, 67.03], [-92.75, 66.5], [-92.97, 65.97], [-93.5, 65.75], [-94.0, 65.96], [-94.32, 65.82], [-94.35, 65.75], [-94.25, 65.5], [-94.47, 64.97], [-95.0, 64.75], [-95.25, 64.85], [-95.5, 64.75], [-96.03, 64.97], [-96.18, 65.32], [-96.5, 65.46], [-97.0, 65.25], [-97.53, 65.47], [-97.75, 66.0], [-97.65, 66.25], [-97.68, 66.32], [-98.03, 66.47], [-98.18, 66.82], [-98.53, 66.97], [-98.75, 67.5], [-98.54, 68.0], [-98.68, 68.32], [-98.75, 68.35], [-99.0, 68.25], [-99.53, 68.47], [-99.75, 69.0], [-99.65, 69.25], [-99.75, 69.5], [-99.53, 70.03], [-99.18, 70.18]]], [[[-104.25, 71.0], [-104.03, 71.53], [-103.5, 71.75], [-103.25, 71.65], [-103.0, 71.75], [-102.75, 71.65], [-102.5, 71.75], [-102.25, 71.65], [-102.0, 71.75], [-101.75, 71.65], [-101.5, 71.75], [-101.25, 71.65], [-101.0, 71.75], [-100.75, 71.65], [-100.5, 71.75], [-99.97, 71.53], [-99.75, 71.0], [-99.97, 70.47], [-100.32, 70.32], [-100.47, 69.97], [-101.0, 69.75], [-101.25, 69.85], [-101.5, 69.75], [-102.03, 69.97], [-102.18, 70.32], [-102.25, 70.35], [-102.5, 70.25], [-102.75, 70.35], [-103.0, 70.25], [-103.25, 70.35], [-103.5, 70.25], [-104.03, 70.47], [-104.25, 71.0]]]]}, "2010-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.03, 70.47], [-104.25, 71.0], [-104.03, 71.53], [-103.5, 71.75], [-103.25, 71.65], [-103.0, 71.75], [-102.75, 71.65], [-102.5, 71.75], [-102.25, 71.65], [-102.0, 71.75], [-101.75, 71.65], [-101.5, 71.75], [-101.25, 71.65], [-101.0, 71.75], [-100.75, 71.65], [-100.5, 71.75], [-99.97, 71.53], [-99.75, 71.0], [-99.85, 70.75], [-99.82, 70.68], [-99.75, 70.65], [-99.5, 70.75], [-99.25, 70.65], [-99.0, 70.75], [-98.75, 70.65], [-98.5, 70.75], [-97.97, 70.53], [-97.82, 70.18], [-97.75, 70.15], [-97.5, 70.25], [-97.25, 70.15], [-97.0, 70.25], [-96.47, 70.03], [-96.32, 69.68], [-95.97, 69.53], [-95.75, 69.0], [-95.96, 68.5], [-95.75, 68.0], [-95.85, 67.75], [-95.82, 67.68], [-95.75, 67.65], [-95.5, 67.75], [-95.25, 67.65], [-95.18, 67.68], [-95.03, 68.03], [-94.5, 68.25], [-94.25, 68.15], [-94.0, 68.25], [-93.47, 68.03], [-93.25, 67.5], [-93.35, 67.25], [-93.32, 67.18], [-92.97, 67.03], [-92.75, 66.5], [-92.97, 65.97], [-93.5, 65.75], [-94.0, 65.96], [-94.32, 65.82], [-94.35, 65.75], [-94.25, 65.5], [-94.47, 64.97], [-95.0, 64.75], [-95.25, 64.85], [-95.5, 64.75], [-96.03, 64.97], [-96.18, 65.32], [-96.5, 65.46], [-97.0, 65.25], [-97.53, 65.47], [-97.75, 66.0], [-97.65, 66.25], [-97.68, 66.32], [-98.03, 66.47], [-98.18, 66.82], [-98.53, 66.97], [-98.75, 67.5], [-98.54, 68.0], [-98.68, 68.32], [-98.75, 68.35], [-99.0, 68.25], [-99.53, 68.47], [-99.68, 68.82], [-100.03, 68.97], [-100.18, 69.32], [-100.25, 69.35], [-100.5, 69.25], [-101.03, 69.47], [-101.18, 69.82], [-101.25, 69.85], [-101.5, 69.75], [-102.03, 69.97], [-102.18, 70.32], [-102.25, 70.35], [-102.5, 70.25], [-102.75, 70.35], [-103.0, 70.25], [-103.25, 70.35], [-103.5, 70.25], [-104.03, 70.47]]]]}, "2010-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.65, 71.25], [-104.75, 71.5], [-104.53, 72.03], [-104.0, 72.25], [-103.75, 72.15], [-103.5, 72.25], [-102.97, 72.03], [-102.82, 71.68], [-102.75, 71.65], [-102.5, 71.75], [-102.25, 71.65], [-102.0, 71.75], [-101.75, 71.65], [-101.5, 71.75], [-101.25, 71.65], [-101.0, 71.75], [-100.75, 71.65], [-100.5, 71.75], [-99.97, 71.53], [-99.75, 71.0], [-99.85, 70.75], [-99.82, 70.68], [-99.75, 70.65], [-99.5, 70.75], [-99.25, 70.65], [-99.0, 70.75], [-98.75, 70.65], [-98.5, 70.75], [-97.97, 70.53], [-97.82, 70.18], [-97.75, 70.15], [-97.5, 70.25], [-97.25, 70.15], [-97.0, 70.25], [-96.47, 70.03], [-96.32, 69.68], [-95.97, 69.53], [-95.75, 69.0], [-95.96, 68.5], [-95.75, 68.0], [-95.85, 67.75], [-95.82, 67.68], [-95.75, 67.65], [-95.5, 67.75], [-95.25, 67.65], [-95.18, 67.68], [-95.03, 68.03], [-94.5, 68.25], [-94.25, 68.15], [-94.0, 68.25], [-93.47, 68.03], [-93.25, 67.5], [-93.35, 67.25], [-93.32, 67.18], [-92.97, 67.03], [-92.75, 66.5], [-92.97, 65.97], [-93.5, 65.75], [-94.0, 65.96], [-94.32, 65.82], [-94.35, 65.75], [-94.25, 65.5], [-94.47, 64.97], [-95.0, 64.75], [-95.25, 64.85], [-95.5, 64.75], [-96.03, 64.97], [-96.18, 65.32], [-96.5, 65.46], [-97.0, 65.25], [-97.53, 65.47], [-97.75, 66.0], [-97.65, 66.25], [-97.68, 66.32], [-98.03, 66.47], [-98.18, 66.82], [-98.53, 66.97], [-98.75, 67.5], [-98.54, 68.0], [-98.68, 68.32], [-98.75, 68.35], [-99.0, 68.25], [-99.53, 68.47], [-99.68, 68.82], [-100.03, 68.97], [-100.18, 69.32], [-100.25, 69.35], [-100.5, 69.25], [-101.03, 69.47], [-101.18, 69.82], [-101.25, 69.85], [-101.5, 69.75], [-102.0, 69.96], [-102.5, 69.75], [-102.75, 69.85], [-103.0, 69.75], [-103.25, 69.85], [-103.5, 69.75], [-103.75, 69.85], [-104.0, 69.75], [-104.53, 69.97], [-104.75, 70.5], [-104.65, 70.75], [-104.75, 71.0], [-104.65, 71.25]]]]}, "2010-08-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.65, 71.25], [-104.75, 71.5], [-104.53, 72.03], [-104.0, 72.25], [-103.75, 72.15], [-103.5, 72.25], [-102.97, 72.03], [-102.82, 71.68], [-102.75, 71.65], [-102.5, 71.75], [-101.97, 71.53], [-101.8, 71.13], [-101.5, 71.25], [-101.25, 71.15], [-101.0, 71.25], [-100.75, 71.15], [-100.5, 71.25], [-99.97, 71.03], [-99.82, 70.68], [-99.75, 70.65], [-99.5, 70.75], [-99.25, 70.65], [-99.0, 70.75], [-98.47, 70.53], [-98.25, 70.0], [-98.35, 69.75], [-98.25, 69.5], [-98.47, 68.97], [-99.0, 68.75], [-99.25, 68.85], [-99.5, 68.75], [-100.03, 68.97], [-100.18, 69.32], [-100.25, 69.35], [-100.5, 69.25], [-101.03, 69.47], [-101.18, 69.82], [-101.25, 69.85], [-101.5, 69.75], [-102.0, 69.96], [-102.5, 69.75], [-102.75, 69.85], [-103.0, 69.75], [-103.25, 69.85], [-103.5, 69.75], [-103.75, 69.85], [-104.0, 69.75], [-104.53, 69.97], [-104.75, 70.5], [-104.65, 70.75], [-104.75, 71.0], [-104.65, 71.25]]]]}, "2010-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.65, 71.25], [-104.75, 71.5], [-104.53, 72.03], [-104.0, 72.25], [-103.75, 72.15], [-103.5, 72.25], [-102.97, 72.03], [-102.82, 71.68], [-102.47, 71.53], [-102.32, 71.18], [-101.97, 71.03], [-101.75, 70.5], [-101.97, 69.97], [-102.5, 69.75], [-102.75, 69.85], [-103.0, 69.75], [-103.25, 69.85], [-103.5, 69.75], [-103.75, 69.85], [-104.0, 69.75], [-104.53, 69.97], [-104.75, 70.5], [-104.65, 70.75], [-104.75, 71.0], [-104.65, 71.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.228646042045625}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.9102163339081693}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.673419771312979, 2.860260659394612, 2.3947943648391856, 1.8947873663690302, -0.0184128571374913, -0.1276580056546095]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.792174340746783, -0.24653536306959722, -0.5983698187904452, -0.5438766600065605, -0.5448750079536353, -0.8671750035701962]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.755055679481554, -4.371000183178175, -4.02515623378661, -3.9692157357720257, -2.180448661671287, -2.8174466711512247]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.2212836689358255, -6.228646042045625, -6.101914480054688, -6.024067938556925, -4.003630844838256, -4.169801640009609]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4676976870531682, -1.4940967034342016, -1.4436273153221346, -1.461405299922567, -1.235637155012842, -1.413511756966878]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.627021779681283, -1.8985645750013036, -1.7541416786972044, -1.8237204134832512, -1.4145637196843484, -1.5520962206419346]}}