{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:54.079368", "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-08_to_2011-Jul-10_241.0_54.0"}, "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": 2011070000616}, "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 08 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 10 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 51284.55920215282}, "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": 54.0}, "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": 241.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "241.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 237.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 243.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 52.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-07-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.0, 54.75], [-121.75, 54.65], [-121.5, 54.75], [-121.25, 54.65], [-121.18, 54.68], [-121.03, 55.03], [-120.5, 55.25], [-120.25, 55.15], [-120.0, 55.25], [-119.75, 55.15], [-119.5, 55.25], [-118.97, 55.03], [-118.82, 54.68], [-118.75, 54.65], [-118.5, 54.75], [-118.25, 54.65], [-118.0, 54.75], [-117.75, 54.65], [-117.5, 54.75], [-117.25, 54.65], [-117.0, 54.75], [-116.47, 54.53], [-116.25, 54.0], [-116.47, 53.47], [-117.0, 53.25], [-117.25, 53.35], [-117.32, 53.32], [-117.35, 53.25], [-117.25, 53.0], [-117.35, 52.75], [-117.25, 52.5], [-117.47, 51.97], [-118.0, 51.75], [-118.53, 51.97], [-118.68, 52.32], [-118.75, 52.35], [-119.0, 52.25], [-119.25, 52.35], [-119.5, 52.25], [-119.75, 52.35], [-120.0, 52.25], [-120.25, 52.35], [-120.5, 52.25], [-121.03, 52.47], [-121.25, 53.0], [-121.15, 53.25], [-121.18, 53.32], [-121.25, 53.35], [-121.32, 53.32], [-121.47, 52.97], [-122.0, 52.75], [-122.25, 52.85], [-122.5, 52.75], [-123.03, 52.97], [-123.25, 53.5], [-123.03, 54.03], [-122.68, 54.18], [-122.53, 54.53], [-122.0, 54.75]]]]}, "2011-07-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.0, 54.75], [-121.75, 54.65], [-121.5, 54.75], [-121.25, 54.65], [-121.18, 54.68], [-121.03, 55.03], [-120.5, 55.25], [-120.25, 55.15], [-120.0, 55.25], [-119.75, 55.15], [-119.5, 55.25], [-118.97, 55.03], [-118.82, 54.68], [-118.75, 54.65], [-118.5, 54.75], [-118.25, 54.65], [-118.0, 54.75], [-117.75, 54.65], [-117.5, 54.75], [-117.25, 54.65], [-117.0, 54.75], [-116.47, 54.53], [-116.25, 54.0], [-116.47, 53.47], [-117.0, 53.25], [-117.25, 53.35], [-117.32, 53.32], [-117.35, 53.25], [-117.25, 53.0], [-117.35, 52.75], [-117.25, 52.5], [-117.47, 51.97], [-118.0, 51.75], [-118.53, 51.97], [-118.68, 52.32], [-118.75, 52.35], [-119.0, 52.25], [-119.25, 52.35], [-119.5, 52.25], [-119.75, 52.35], [-120.0, 52.25], [-120.25, 52.35], [-120.5, 52.25], [-121.03, 52.47], [-121.25, 53.0], [-121.15, 53.25], [-121.18, 53.32], [-121.25, 53.35], [-121.32, 53.32], [-121.47, 52.97], [-122.0, 52.75], [-122.25, 52.85], [-122.5, 52.75], [-123.03, 52.97], [-123.25, 53.5], [-123.03, 54.03], [-122.68, 54.18], [-122.53, 54.53], [-122.0, 54.75]]]]}, "2011-07-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.0, 54.75], [-121.75, 54.65], [-121.5, 54.75], [-121.25, 54.65], [-121.18, 54.68], [-121.03, 55.03], [-120.5, 55.25], [-120.25, 55.15], [-120.0, 55.25], [-119.75, 55.15], [-119.5, 55.25], [-118.97, 55.03], [-118.82, 54.68], [-118.75, 54.65], [-118.5, 54.75], [-118.25, 54.65], [-118.0, 54.75], [-117.75, 54.65], [-117.5, 54.75], [-117.25, 54.65], [-117.0, 54.75], [-116.47, 54.53], [-116.25, 54.0], [-116.47, 53.47], [-117.0, 53.25], [-117.25, 53.35], [-117.32, 53.32], [-117.35, 53.25], [-117.25, 53.0], [-117.35, 52.75], [-117.25, 52.5], [-117.47, 51.97], [-118.0, 51.75], [-118.53, 51.97], [-118.68, 52.32], [-118.75, 52.35], [-119.0, 52.25], [-119.25, 52.35], [-119.5, 52.25], [-119.75, 52.35], [-120.0, 52.25], [-120.25, 52.35], [-120.5, 52.25], [-121.03, 52.47], [-121.25, 53.0], [-121.15, 53.25], [-121.18, 53.32], [-121.25, 53.35], [-121.32, 53.32], [-121.47, 52.97], [-122.0, 52.75], [-122.25, 52.85], [-122.5, 52.75], [-123.03, 52.97], [-123.25, 53.5], [-123.03, 54.03], [-122.68, 54.18], [-122.53, 54.53], [-122.0, 54.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.8024247365456745}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.0281475183225695}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.558613951185805, 5.397404945297467, 7.4800333618788954]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.3640254218154837, 1.5318409235092645, 3.8720666348415875]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.730170106281499, -6.119049506105952, -4.235222942580257]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.597724759280084, -7.8024247365456745, -5.1714759043396725]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6061322265874958, -2.063007477316297, -1.3988617313534246]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0485204166191706, -2.4193678646920853, -1.88899829964076]}}