{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:01.412225", "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": "2017-Jan-08_to_2017-Jan-12_232.0_55.5"}, "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": 2017010000321}, "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": "January 08 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 12 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 79093.71960291007}, "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": 55.5}, "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": 232.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "232.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 230.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 237.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-129.75, 58.0], [-129.53, 58.53], [-129.0, 58.75], [-128.75, 58.65], [-128.5, 58.75], [-128.25, 58.65], [-128.0, 58.75], [-127.75, 58.65], [-127.5, 58.75], [-127.25, 58.65], [-127.0, 58.75], [-126.47, 58.53], [-126.3, 58.13], [-126.18, 58.18], [-126.03, 58.53], [-125.5, 58.75], [-124.97, 58.53], [-124.75, 58.0], [-124.97, 57.47], [-125.32, 57.32], [-125.37, 57.2], [-124.97, 57.03], [-124.75, 56.5], [-124.97, 55.97], [-125.5, 55.75], [-126.03, 55.97], [-126.25, 56.5], [-126.12, 56.8], [-126.53, 56.97], [-126.7, 57.38], [-127.0, 57.25], [-127.25, 57.35], [-127.5, 57.25], [-127.75, 57.35], [-127.82, 57.32], [-127.97, 56.97], [-128.5, 56.75], [-129.03, 56.97], [-129.18, 57.32], [-129.53, 57.47], [-129.75, 58.0]]]]}, "2017-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.03, 55.97], [-130.25, 56.5], [-130.03, 57.03], [-129.5, 57.25], [-129.2, 57.13], [-129.15, 57.25], [-129.18, 57.32], [-129.53, 57.47], [-129.75, 58.0], [-129.53, 58.53], [-129.0, 58.75], [-128.75, 58.65], [-128.5, 58.75], [-128.25, 58.65], [-128.0, 58.75], [-127.75, 58.65], [-127.5, 58.75], [-127.25, 58.65], [-127.0, 58.75], [-126.47, 58.53], [-126.32, 58.18], [-126.25, 58.15], [-126.18, 58.18], [-126.03, 58.53], [-125.5, 58.75], [-124.97, 58.53], [-124.75, 58.0], [-124.97, 57.47], [-125.32, 57.32], [-125.35, 57.25], [-125.32, 57.18], [-124.97, 57.03], [-124.75, 56.5], [-124.97, 55.97], [-125.5, 55.75], [-126.0, 55.96], [-126.5, 55.75], [-126.75, 55.85], [-127.0, 55.75], [-127.25, 55.85], [-127.5, 55.75], [-127.75, 55.85], [-127.82, 55.82], [-127.97, 55.47], [-128.5, 55.25], [-129.03, 55.47], [-129.2, 55.88], [-129.5, 55.75], [-130.03, 55.97]]]]}, "2017-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.25, 56.5], [-130.03, 57.03], [-129.5, 57.25], [-129.2, 57.13], [-129.15, 57.25], [-129.18, 57.32], [-129.53, 57.47], [-129.75, 58.0], [-129.53, 58.53], [-129.0, 58.75], [-128.75, 58.65], [-128.5, 58.75], [-128.25, 58.65], [-128.0, 58.75], [-127.75, 58.65], [-127.5, 58.75], [-127.25, 58.65], [-127.0, 58.75], [-126.47, 58.53], [-126.32, 58.18], [-126.25, 58.15], [-126.18, 58.18], [-126.03, 58.53], [-125.5, 58.75], [-124.97, 58.53], [-124.75, 58.0], [-124.97, 57.47], [-125.32, 57.32], [-125.35, 57.25], [-125.32, 57.18], [-124.97, 57.03], [-124.75, 56.5], [-124.87, 56.2], [-124.75, 56.15], [-124.5, 56.25], [-124.25, 56.15], [-124.0, 56.25], [-123.47, 56.03], [-123.32, 55.68], [-123.25, 55.65], [-123.0, 55.75], [-122.47, 55.53], [-122.25, 55.0], [-122.35, 54.75], [-122.25, 54.5], [-122.47, 53.97], [-123.0, 53.75], [-123.53, 53.97], [-123.68, 54.32], [-123.75, 54.35], [-124.0, 54.25], [-124.25, 54.35], [-124.5, 54.25], [-125.0, 54.46], [-125.32, 54.32], [-125.47, 53.97], [-126.0, 53.75], [-126.53, 53.97], [-126.68, 54.32], [-126.75, 54.35], [-127.0, 54.25], [-127.25, 54.35], [-127.5, 54.25], [-127.75, 54.35], [-128.0, 54.25], [-128.53, 54.47], [-128.68, 54.82], [-128.75, 54.85], [-129.0, 54.75], [-129.53, 54.97], [-129.75, 55.5], [-129.65, 55.75], [-129.68, 55.82], [-130.03, 55.97], [-130.25, 56.5]]]]}, "2017-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.25, 56.5], [-130.03, 57.03], [-129.5, 57.25], [-129.2, 57.13], [-129.03, 57.53], [-128.5, 57.75], [-128.2, 57.63], [-128.03, 58.03], [-127.5, 58.25], [-127.25, 58.15], [-127.0, 58.25], [-126.75, 58.15], [-126.5, 58.25], [-125.97, 58.03], [-125.82, 57.68], [-125.47, 57.53], [-125.25, 57.0], [-125.47, 56.47], [-125.82, 56.32], [-125.87, 56.2], [-125.5, 56.04], [-125.0, 56.25], [-124.75, 56.15], [-124.5, 56.25], [-124.25, 56.15], [-124.0, 56.25], [-123.47, 56.03], [-123.32, 55.68], [-123.25, 55.65], [-123.0, 55.75], [-122.47, 55.53], [-122.25, 55.0], [-122.35, 54.75], [-122.25, 54.5], [-122.47, 53.97], [-123.0, 53.75], [-123.53, 53.97], [-123.68, 54.32], [-123.75, 54.35], [-124.0, 54.25], [-124.25, 54.35], [-124.5, 54.25], [-125.0, 54.46], [-125.32, 54.32], [-125.47, 53.97], [-126.0, 53.75], [-126.53, 53.97], [-126.68, 54.32], [-126.75, 54.35], [-127.0, 54.25], [-127.25, 54.35], [-127.5, 54.25], [-127.75, 54.35], [-128.0, 54.25], [-128.53, 54.47], [-128.68, 54.82], [-128.75, 54.85], [-129.0, 54.75], [-129.53, 54.97], [-129.75, 55.5], [-129.65, 55.75], [-129.68, 55.82], [-130.03, 55.97], [-130.25, 56.5]]]]}, "2017-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-129.53, 56.53], [-129.0, 56.75], [-128.47, 56.53], [-128.32, 56.18], [-128.25, 56.15], [-128.0, 56.25], [-127.75, 56.15], [-127.5, 56.25], [-127.25, 56.15], [-127.0, 56.25], [-126.75, 56.15], [-126.5, 56.25], [-126.25, 56.15], [-126.0, 56.25], [-125.5, 56.04], [-125.0, 56.25], [-124.75, 56.15], [-124.5, 56.25], [-124.25, 56.15], [-124.0, 56.25], [-123.47, 56.03], [-123.32, 55.68], [-123.25, 55.65], [-123.0, 55.75], [-122.47, 55.53], [-122.25, 55.0], [-122.35, 54.75], [-122.25, 54.5], [-122.47, 53.97], [-123.0, 53.75], [-123.53, 53.97], [-123.68, 54.32], [-123.75, 54.35], [-124.0, 54.25], [-124.25, 54.35], [-124.5, 54.25], [-125.0, 54.46], [-125.32, 54.32], [-125.47, 53.97], [-126.0, 53.75], [-126.53, 53.97], [-126.68, 54.32], [-126.75, 54.35], [-127.0, 54.25], [-127.25, 54.35], [-127.5, 54.25], [-127.75, 54.35], [-128.0, 54.25], [-128.53, 54.47], [-128.68, 54.82], [-128.75, 54.85], [-129.0, 54.75], [-129.53, 54.97], [-129.75, 55.5], [-129.65, 55.75], [-129.75, 56.0], [-129.53, 56.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -17.455240395095473}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -14.024936176192806}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-29.4113515828156, -29.265230824472525, -27.370324306470962, -26.93330115400991, -24.614715785830043]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-32.381701721766035, -35.2037107064632, -34.84109736994648, -33.25128880773897, -26.580546916024304]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.831984757892009, -13.481345089431091, -14.041137576305767, -14.828213407597952, -14.102007297629312]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-14.292557292213132, -17.147207142382, -17.33634692476292, -17.455240395095473, -15.840917136995529]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.564884259717261, -1.733140254814683, -1.7598274727934244, -1.7809357079124402, -1.6496512149747655]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7885811124930906, -2.176888541837188, -2.1377390210573166, -2.168930526822818, -1.8116400124372223]}}