{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:58.249959", "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": "2011-Jul-29_to_2011-Aug-01_236.5_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": 2011070001585}, "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": "July 29 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 01 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 69734.59316875858}, "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": 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": 233.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 238.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-07-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.75, 55.0], [-126.53, 55.53], [-126.0, 55.75], [-125.75, 55.65], [-125.5, 55.75], [-125.25, 55.65], [-125.18, 55.68], [-125.15, 55.75], [-125.25, 56.0], [-125.03, 56.53], [-124.5, 56.75], [-124.25, 56.65], [-124.0, 56.75], [-123.75, 56.65], [-123.5, 56.75], [-123.0, 56.54], [-122.5, 56.75], [-121.97, 56.53], [-121.75, 56.0], [-121.96, 55.5], [-121.75, 55.0], [-121.85, 54.75], [-121.75, 54.5], [-121.97, 53.97], [-122.32, 53.82], [-122.47, 53.47], [-123.0, 53.25], [-123.53, 53.47], [-123.68, 53.82], [-123.75, 53.85], [-124.0, 53.75], [-124.25, 53.85], [-124.5, 53.75], [-124.75, 53.85], [-125.0, 53.75], [-125.25, 53.85], [-125.5, 53.75], [-126.03, 53.97], [-126.18, 54.32], [-126.53, 54.47], [-126.75, 55.0]]]]}, "2011-07-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.54, 54.5], [-126.75, 55.0], [-126.53, 55.53], [-126.0, 55.75], [-125.75, 55.65], [-125.5, 55.75], [-125.25, 55.65], [-125.18, 55.68], [-125.15, 55.75], [-125.25, 56.0], [-125.03, 56.53], [-124.5, 56.75], [-124.25, 56.65], [-124.0, 56.75], [-123.75, 56.65], [-123.5, 56.75], [-123.0, 56.54], [-122.5, 56.75], [-121.97, 56.53], [-121.82, 56.18], [-121.47, 56.03], [-121.25, 55.5], [-121.47, 54.97], [-121.82, 54.82], [-121.85, 54.75], [-121.75, 54.5], [-121.85, 54.25], [-121.75, 54.0], [-121.97, 53.47], [-122.32, 53.32], [-122.47, 52.97], [-123.0, 52.75], [-123.25, 52.85], [-123.5, 52.75], [-123.75, 52.85], [-124.0, 52.75], [-124.5, 52.96], [-125.0, 52.75], [-125.25, 52.85], [-125.5, 52.75], [-125.75, 52.85], [-126.0, 52.75], [-126.53, 52.97], [-126.75, 53.5], [-126.65, 53.75], [-126.75, 54.0], [-126.54, 54.5]]]]}, "2011-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.54, 54.5], [-126.75, 55.0], [-126.53, 55.53], [-126.0, 55.75], [-125.75, 55.65], [-125.5, 55.75], [-125.25, 55.65], [-125.18, 55.68], [-125.15, 55.75], [-125.25, 56.0], [-125.03, 56.53], [-124.5, 56.75], [-124.25, 56.65], [-124.0, 56.75], [-123.75, 56.65], [-123.5, 56.75], [-123.0, 56.54], [-122.5, 56.75], [-121.97, 56.53], [-121.82, 56.18], [-121.47, 56.03], [-121.25, 55.5], [-121.47, 54.97], [-121.82, 54.82], [-121.85, 54.75], [-121.75, 54.5], [-121.85, 54.25], [-121.75, 54.0], [-121.97, 53.47], [-122.32, 53.32], [-122.47, 52.97], [-123.0, 52.75], [-123.25, 52.85], [-123.5, 52.75], [-123.75, 52.85], [-124.0, 52.75], [-124.5, 52.96], [-125.0, 52.75], [-125.25, 52.85], [-125.5, 52.75], [-125.75, 52.85], [-126.0, 52.75], [-126.53, 52.97], [-126.75, 53.5], [-126.65, 53.75], [-126.75, 54.0], [-126.54, 54.5]]]]}, "2011-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.54, 54.5], [-126.75, 55.0], [-126.53, 55.53], [-126.0, 55.75], [-125.75, 55.65], [-125.5, 55.75], [-125.25, 55.65], [-125.0, 55.75], [-124.75, 55.65], [-124.62, 55.7], [-124.75, 56.0], [-124.53, 56.53], [-124.0, 56.75], [-123.75, 56.65], [-123.5, 56.75], [-122.97, 56.53], [-122.82, 56.18], [-122.75, 56.15], [-122.5, 56.25], [-122.25, 56.15], [-122.0, 56.25], [-121.47, 56.03], [-121.25, 55.5], [-121.47, 54.97], [-121.82, 54.82], [-121.85, 54.75], [-121.75, 54.5], [-121.85, 54.25], [-121.75, 54.0], [-121.97, 53.47], [-122.32, 53.32], [-122.47, 52.97], [-123.0, 52.75], [-123.25, 52.85], [-123.5, 52.75], [-123.75, 52.85], [-124.0, 52.75], [-124.5, 52.96], [-125.0, 52.75], [-125.25, 52.85], [-125.5, 52.75], [-125.75, 52.85], [-126.0, 52.75], [-126.53, 52.97], [-126.75, 53.5], [-126.65, 53.75], [-126.75, 54.0], [-126.54, 54.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.659837127435935}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.294624732490276}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.686502574230815, 10.907093679414743, 10.29739266480658, 10.692617649128124]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.350652578613278, 8.568148886416111, 8.325753217987256, 8.322820005269989]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.114069710184308, -3.9875329160669004, -4.615082871094572, -4.403539988784197]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.524736003270789, -4.465756057551914, -5.659837127435935, -5.265802787939606]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4261804188238134, -1.2861859796977722, -1.445253833129132, -1.369850010634045]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6653475159922964, -1.391002215413272, -1.6765537596626066, -1.5868453493331625]}}