{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:59.008441", "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": "2015-May-19_to_2015-May-23_308.0_67.0"}, "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": 2015050000691}, "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": "May 19 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 23 2015"}, "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": 78137.9305362771}, "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": ["Greenland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland"]}, "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": ["Davis Strait"]}, "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": 67.0}, "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": 308.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "308.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 305.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 311.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 68.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.75, 64.0], [-54.53, 64.53], [-54.12, 64.7], [-54.18, 64.82], [-54.53, 64.97], [-54.68, 65.32], [-55.03, 65.47], [-55.25, 66.0], [-55.03, 66.53], [-54.5, 66.75], [-54.25, 66.65], [-54.0, 66.75], [-53.75, 66.65], [-53.5, 66.75], [-53.25, 66.65], [-53.0, 66.75], [-52.75, 66.65], [-52.62, 66.7], [-52.75, 67.0], [-52.53, 67.53], [-52.0, 67.75], [-51.75, 67.65], [-51.5, 67.75], [-51.2, 67.63], [-51.03, 68.03], [-50.5, 68.25], [-49.97, 68.03], [-49.8, 67.63], [-49.5, 67.75], [-48.97, 67.53], [-48.75, 67.0], [-48.96, 66.5], [-48.75, 66.0], [-48.85, 65.75], [-48.75, 65.5], [-48.85, 65.25], [-48.82, 65.18], [-48.47, 65.03], [-48.25, 64.5], [-48.47, 63.97], [-49.0, 63.75], [-49.25, 63.85], [-49.5, 63.75], [-49.75, 63.85], [-50.0, 63.75], [-50.3, 63.88], [-50.47, 63.47], [-50.82, 63.32], [-50.97, 62.97], [-51.5, 62.75], [-51.75, 62.85], [-51.82, 62.82], [-51.97, 62.47], [-52.5, 62.25], [-52.75, 62.35], [-53.0, 62.25], [-53.25, 62.35], [-53.5, 62.25], [-53.75, 62.35], [-54.0, 62.25], [-54.25, 62.35], [-54.5, 62.25], [-55.03, 62.47], [-55.25, 63.0], [-55.03, 63.53], [-54.68, 63.68], [-54.65, 63.75], [-54.75, 64.0]], [[-50.7, 64.63], [-50.65, 64.75], [-50.75, 65.0], [-50.53, 65.53], [-50.18, 65.68], [-50.15, 65.75], [-50.18, 65.82], [-50.25, 65.85], [-50.5, 65.75], [-50.75, 65.85], [-50.82, 65.82], [-50.85, 65.75], [-50.75, 65.5], [-50.97, 64.97], [-51.32, 64.82], [-51.37, 64.7], [-51.25, 64.65], [-51.0, 64.75], [-50.7, 64.63]]]]}, "2015-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.75, 64.0], [-54.53, 64.53], [-54.12, 64.7], [-54.18, 64.82], [-54.53, 64.97], [-54.68, 65.32], [-55.03, 65.47], [-55.25, 66.0], [-55.03, 66.53], [-54.5, 66.75], [-54.25, 66.65], [-54.0, 66.75], [-53.75, 66.65], [-53.5, 66.75], [-53.25, 66.65], [-53.0, 66.75], [-52.75, 66.65], [-52.62, 66.7], [-52.75, 67.0], [-52.65, 67.25], [-52.68, 67.32], [-52.75, 67.35], [-53.0, 67.25], [-53.25, 67.35], [-53.5, 67.25], [-54.03, 67.47], [-54.25, 68.0], [-54.03, 68.53], [-53.5, 68.75], [-53.25, 68.65], [-53.0, 68.75], [-52.75, 68.65], [-52.5, 68.75], [-52.25, 68.65], [-52.0, 68.75], [-51.75, 68.65], [-51.5, 68.75], [-51.25, 68.65], [-51.0, 68.75], [-50.75, 68.65], [-50.5, 68.75], [-49.97, 68.53], [-49.75, 68.0], [-49.85, 67.75], [-49.8, 67.63], [-49.5, 67.75], [-48.97, 67.53], [-48.75, 67.0], [-48.96, 66.5], [-48.75, 66.0], [-48.85, 65.75], [-48.75, 65.5], [-48.85, 65.25], [-48.82, 65.18], [-48.47, 65.03], [-48.25, 64.5], [-48.47, 63.97], [-49.0, 63.75], [-49.25, 63.85], [-49.5, 63.75], [-49.75, 63.85], [-50.0, 63.75], [-50.3, 63.88], [-50.47, 63.47], [-50.82, 63.32], [-50.97, 62.97], [-51.5, 62.75], [-51.75, 62.85], [-51.82, 62.82], [-51.97, 62.47], [-52.5, 62.25], [-52.75, 62.35], [-53.0, 62.25], [-53.25, 62.35], [-53.5, 62.25], [-53.75, 62.35], [-54.0, 62.25], [-54.25, 62.35], [-54.5, 62.25], [-55.03, 62.47], [-55.25, 63.0], [-55.03, 63.53], [-54.68, 63.68], [-54.65, 63.75], [-54.75, 64.0]], [[-50.7, 64.63], [-50.65, 64.75], [-50.75, 65.0], [-50.53, 65.53], [-50.18, 65.68], [-50.15, 65.75], [-50.18, 65.82], [-50.25, 65.85], [-50.5, 65.75], [-50.75, 65.85], [-50.82, 65.82], [-50.85, 65.75], [-50.75, 65.5], [-50.97, 64.97], [-51.32, 64.82], [-51.37, 64.7], [-51.25, 64.65], [-51.0, 64.75], [-50.7, 64.63]]]]}, "2015-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.75, 64.0], [-54.53, 64.53], [-54.12, 64.7], [-54.18, 64.82], [-54.53, 64.97], [-54.68, 65.32], [-55.03, 65.47], [-55.25, 66.0], [-55.03, 66.53], [-54.5, 66.75], [-54.25, 66.65], [-54.0, 66.75], [-53.75, 66.65], [-53.5, 66.75], [-53.25, 66.65], [-53.0, 66.75], [-52.75, 66.65], [-52.62, 66.7], [-52.75, 67.0], [-52.65, 67.25], [-52.68, 67.32], [-52.75, 67.35], [-53.0, 67.25], [-53.25, 67.35], [-53.5, 67.25], [-54.03, 67.47], [-54.25, 68.0], [-54.03, 68.53], [-53.5, 68.75], [-53.25, 68.65], [-53.18, 68.68], [-53.03, 69.03], [-52.5, 69.25], [-51.97, 69.03], [-51.82, 68.68], [-51.75, 68.65], [-51.5, 68.75], [-51.25, 68.65], [-51.0, 68.75], [-50.75, 68.65], [-50.5, 68.75], [-49.97, 68.53], [-49.75, 68.0], [-49.85, 67.75], [-49.8, 67.63], [-49.5, 67.75], [-48.97, 67.53], [-48.75, 67.0], [-48.96, 66.5], [-48.75, 66.0], [-48.85, 65.75], [-48.75, 65.5], [-48.85, 65.25], [-48.82, 65.18], [-48.47, 65.03], [-48.25, 64.5], [-48.47, 63.97], [-49.0, 63.75], [-49.25, 63.85], [-49.5, 63.75], [-49.75, 63.85], [-50.0, 63.75], [-50.3, 63.88], [-50.47, 63.47], [-50.82, 63.32], [-50.97, 62.97], [-51.5, 62.75], [-51.75, 62.85], [-51.82, 62.82], [-51.97, 62.47], [-52.5, 62.25], [-52.75, 62.35], [-53.0, 62.25], [-53.25, 62.35], [-53.5, 62.25], [-53.75, 62.35], [-54.0, 62.25], [-54.25, 62.35], [-54.5, 62.25], [-55.03, 62.47], [-55.25, 63.0], [-55.03, 63.53], [-54.68, 63.68], [-54.65, 63.75], [-54.75, 64.0]], [[-50.7, 64.63], [-50.65, 64.75], [-50.75, 65.0], [-50.53, 65.53], [-50.18, 65.68], [-50.15, 65.75], [-50.18, 65.82], [-50.25, 65.85], [-50.5, 65.75], [-50.75, 65.85], [-50.82, 65.82], [-50.85, 65.75], [-50.75, 65.5], [-50.97, 64.97], [-51.32, 64.82], [-51.37, 64.7], [-51.25, 64.65], [-51.0, 64.75], [-50.7, 64.63]]]]}, "2015-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.03, 67.47], [-54.25, 68.0], [-54.03, 68.53], [-53.5, 68.75], [-53.25, 68.65], [-53.18, 68.68], [-53.03, 69.03], [-52.5, 69.25], [-51.97, 69.03], [-51.82, 68.68], [-51.75, 68.65], [-51.5, 68.75], [-51.25, 68.65], [-51.0, 68.75], [-50.75, 68.65], [-50.5, 68.75], [-49.97, 68.53], [-49.75, 68.0], [-49.85, 67.75], [-49.75, 67.5], [-49.97, 66.97], [-50.5, 66.75], [-50.75, 66.85], [-51.0, 66.75], [-51.25, 66.85], [-51.32, 66.82], [-51.47, 66.47], [-52.0, 66.25], [-52.53, 66.47], [-52.75, 67.0], [-52.65, 67.25], [-52.68, 67.32], [-52.75, 67.35], [-53.0, 67.25], [-53.25, 67.35], [-53.5, 67.25], [-54.03, 67.47]]]]}, "2015-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.03, 67.47], [-54.25, 68.0], [-54.03, 68.53], [-53.5, 68.75], [-53.25, 68.65], [-53.18, 68.68], [-53.03, 69.03], [-52.5, 69.25], [-51.97, 69.03], [-51.82, 68.68], [-51.75, 68.65], [-51.5, 68.75], [-51.25, 68.65], [-51.0, 68.75], [-50.75, 68.65], [-50.5, 68.75], [-49.97, 68.53], [-49.75, 68.0], [-49.97, 67.47], [-50.5, 67.25], [-50.75, 67.35], [-51.0, 67.25], [-51.25, 67.35], [-51.5, 67.25], [-51.75, 67.35], [-52.0, 67.25], [-52.25, 67.35], [-52.5, 67.25], [-52.75, 67.35], [-53.0, 67.25], [-53.25, 67.35], [-53.5, 67.25], [-54.03, 67.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.921076479144972}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.232723738884668}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.914472853305881, -4.251127621468129, -4.117424416078393, -3.603108163390118, -3.5504216609834884]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-11.766354830941111, -11.260402397014616, -10.68121370727846, -4.510141707669391, -3.7558401840529427]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.37984866891587, -4.039117949444765, -4.028345212114316, -5.008203883596943, -5.063467378455364]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.921076479144972, -6.670409279446858, -6.579568041849711, -6.392163889438336, -5.72638485170944]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7768296626882065, -1.4339917255913919, -1.4380770532876206, -1.3336751575467465, -1.4914657951508201]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4161207886435756, -1.6325756162784348, -1.8929733629238121, -1.4090019714218684, -1.6469656431456765]}}