{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:57.644525", "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": "2013-Jul-30_to_2013-Aug-07_343.5_65.5"}, "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": 2013070001526}, "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 30 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 07 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 97387.54136315577}, "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": ["Iceland"]}, "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": ["Europe"]}, "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": ["Greenland Sea", "North Atlantic Ocean"]}, "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": 65.5}, "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": 343.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "343.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 337.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 346.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 63.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-07-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.03, 65.47], [-17.25, 66.0], [-17.03, 66.53], [-16.5, 66.75], [-16.25, 66.65], [-16.0, 66.75], [-15.47, 66.53], [-15.25, 66.0], [-15.47, 65.47], [-16.0, 65.25], [-16.25, 65.35], [-16.5, 65.25], [-17.03, 65.47]]]]}, "2013-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.03, 66.03], [-17.68, 66.18], [-17.53, 66.53], [-17.0, 66.75], [-16.75, 66.65], [-16.5, 66.75], [-16.25, 66.65], [-16.0, 66.75], [-15.75, 66.65], [-15.5, 66.75], [-15.25, 66.65], [-15.0, 66.75], [-14.47, 66.53], [-14.32, 66.18], [-14.25, 66.15], [-14.0, 66.25], [-13.47, 66.03], [-13.25, 65.5], [-13.47, 64.97], [-13.82, 64.82], [-13.97, 64.47], [-14.5, 64.25], [-14.75, 64.35], [-15.0, 64.25], [-15.25, 64.35], [-15.5, 64.25], [-15.75, 64.35], [-16.0, 64.25], [-16.25, 64.35], [-16.5, 64.25], [-16.75, 64.35], [-17.0, 64.25], [-17.25, 64.35], [-17.5, 64.25], [-18.03, 64.47], [-18.25, 65.0], [-18.15, 65.25], [-18.25, 65.5], [-18.03, 66.03]]]]}, "2013-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.03, 66.03], [-17.68, 66.18], [-17.53, 66.53], [-17.0, 66.75], [-16.75, 66.65], [-16.5, 66.75], [-16.25, 66.65], [-16.0, 66.75], [-15.75, 66.65], [-15.5, 66.75], [-15.25, 66.65], [-15.0, 66.75], [-14.47, 66.53], [-14.32, 66.18], [-14.25, 66.15], [-14.0, 66.25], [-13.47, 66.03], [-13.25, 65.5], [-13.47, 64.97], [-13.82, 64.82], [-13.97, 64.47], [-14.5, 64.25], [-14.75, 64.35], [-15.0, 64.25], [-15.25, 64.35], [-15.5, 64.25], [-15.75, 64.35], [-16.0, 64.25], [-16.25, 64.35], [-16.5, 64.25], [-16.75, 64.35], [-17.0, 64.25], [-17.25, 64.35], [-17.5, 64.25], [-18.03, 64.47], [-18.25, 65.0], [-18.15, 65.25], [-18.25, 65.5], [-18.03, 66.03]]]]}, "2013-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-18.03, 66.03], [-17.68, 66.18], [-17.53, 66.53], [-17.0, 66.75], [-16.75, 66.65], [-16.5, 66.75], [-16.25, 66.65], [-16.0, 66.75], [-15.75, 66.65], [-15.5, 66.75], [-15.25, 66.65], [-15.0, 66.75], [-14.47, 66.53], [-14.32, 66.18], [-14.25, 66.15], [-14.0, 66.25], [-13.47, 66.03], [-13.25, 65.5], [-13.47, 64.97], [-13.82, 64.82], [-13.97, 64.47], [-14.5, 64.25], [-14.75, 64.35], [-15.0, 64.25], [-15.25, 64.35], [-15.5, 64.25], [-15.75, 64.35], [-16.0, 64.25], [-16.25, 64.35], [-16.5, 64.25], [-16.75, 64.35], [-17.0, 64.25], [-17.25, 64.35], [-17.5, 64.25], [-18.03, 64.47], [-18.25, 65.0], [-18.15, 65.25], [-18.25, 65.5], [-18.03, 66.03]]]]}, "2013-08-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-22.03, 64.97], [-22.25, 65.5], [-22.03, 66.03], [-21.5, 66.25], [-20.97, 66.03], [-20.75, 65.5], [-20.97, 64.97], [-21.5, 64.75], [-22.03, 64.97]]], [[[-18.25, 65.5], [-18.03, 66.03], [-17.5, 66.25], [-17.25, 66.15], [-17.0, 66.25], [-16.75, 66.15], [-16.5, 66.25], [-15.97, 66.03], [-15.75, 65.5], [-15.97, 64.97], [-16.5, 64.75], [-16.75, 64.85], [-17.0, 64.75], [-17.25, 64.85], [-17.5, 64.75], [-18.03, 64.97], [-18.25, 65.5]]]]}, "2013-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.03, 65.03], [-22.68, 65.18], [-22.53, 65.53], [-22.18, 65.68], [-22.15, 65.75], [-22.25, 66.0], [-22.03, 66.53], [-21.68, 66.68], [-21.53, 67.03], [-21.0, 67.25], [-20.75, 67.15], [-20.5, 67.25], [-20.25, 67.15], [-20.0, 67.25], [-19.75, 67.15], [-19.5, 67.25], [-19.25, 67.15], [-19.0, 67.25], [-18.75, 67.15], [-18.5, 67.25], [-18.25, 67.15], [-18.18, 67.18], [-18.03, 67.53], [-17.5, 67.75], [-16.97, 67.53], [-16.82, 67.18], [-16.75, 67.15], [-16.5, 67.25], [-16.25, 67.15], [-16.0, 67.25], [-15.75, 67.15], [-15.68, 67.18], [-15.53, 67.53], [-15.0, 67.75], [-14.47, 67.53], [-14.25, 67.0], [-14.35, 66.75], [-14.32, 66.68], [-13.97, 66.53], [-13.82, 66.18], [-13.75, 66.15], [-13.5, 66.25], [-12.97, 66.03], [-12.75, 65.5], [-12.97, 64.97], [-13.5, 64.75], [-13.75, 64.85], [-13.82, 64.82], [-13.97, 64.47], [-14.5, 64.25], [-14.75, 64.35], [-15.0, 64.25], [-15.25, 64.35], [-15.5, 64.25], [-15.75, 64.35], [-16.0, 64.25], [-16.25, 64.35], [-16.5, 64.25], [-16.75, 64.35], [-17.0, 64.25], [-17.25, 64.35], [-17.32, 64.32], [-17.47, 63.97], [-18.0, 63.75], [-18.25, 63.85], [-18.5, 63.75], [-18.75, 63.85], [-19.0, 63.75], [-19.5, 63.96], [-20.0, 63.75], [-20.25, 63.85], [-20.5, 63.75], [-20.75, 63.85], [-21.0, 63.75], [-21.25, 63.85], [-21.5, 63.75], [-21.75, 63.85], [-21.82, 63.82], [-21.97, 63.47], [-22.5, 63.25], [-23.03, 63.47], [-23.25, 64.0], [-23.15, 64.25], [-23.25, 64.5], [-23.03, 65.03]]]]}, "2013-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.03, 65.03], [-22.68, 65.18], [-22.53, 65.53], [-22.18, 65.68], [-22.15, 65.75], [-22.25, 66.0], [-22.03, 66.53], [-21.68, 66.68], [-21.53, 67.03], [-21.0, 67.25], [-20.75, 67.15], [-20.5, 67.25], [-20.25, 67.15], [-20.0, 67.25], [-19.75, 67.15], [-19.5, 67.25], [-19.25, 67.15], [-19.0, 67.25], [-18.75, 67.15], [-18.5, 67.25], [-18.25, 67.15], [-18.18, 67.18], [-18.03, 67.53], [-17.5, 67.75], [-16.97, 67.53], [-16.82, 67.18], [-16.75, 67.15], [-16.5, 67.25], [-16.25, 67.15], [-16.0, 67.25], [-15.75, 67.15], [-15.68, 67.18], [-15.53, 67.53], [-15.0, 67.75], [-14.47, 67.53], [-14.25, 67.0], [-14.35, 66.75], [-14.32, 66.68], [-13.97, 66.53], [-13.82, 66.18], [-13.75, 66.15], [-13.5, 66.25], [-12.97, 66.03], [-12.75, 65.5], [-12.97, 64.97], [-13.5, 64.75], [-13.75, 64.85], [-13.82, 64.82], [-13.97, 64.47], [-14.5, 64.25], [-14.75, 64.35], [-15.0, 64.25], [-15.25, 64.35], [-15.5, 64.25], [-15.75, 64.35], [-16.0, 64.25], [-16.25, 64.35], [-16.5, 64.25], [-16.75, 64.35], [-17.0, 64.25], [-17.25, 64.35], [-17.32, 64.32], [-17.47, 63.97], [-18.0, 63.75], [-18.25, 63.85], [-18.5, 63.75], [-18.75, 63.85], [-19.0, 63.75], [-19.5, 63.96], [-20.0, 63.75], [-20.25, 63.85], [-20.32, 63.82], [-20.47, 63.47], [-21.0, 63.25], [-21.25, 63.35], [-21.5, 63.25], [-21.75, 63.35], [-22.0, 63.25], [-22.25, 63.35], [-22.5, 63.25], [-23.03, 63.47], [-23.25, 64.0], [-23.15, 64.25], [-23.25, 64.5], [-23.03, 65.03]]]]}, "2013-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.03, 65.03], [-22.68, 65.18], [-22.53, 65.53], [-22.18, 65.68], [-22.15, 65.75], [-22.25, 66.0], [-22.03, 66.53], [-21.68, 66.68], [-21.53, 67.03], [-21.0, 67.25], [-20.75, 67.15], [-20.5, 67.25], [-20.25, 67.15], [-20.0, 67.25], [-19.75, 67.15], [-19.5, 67.25], [-19.25, 67.15], [-19.0, 67.25], [-18.75, 67.15], [-18.5, 67.25], [-18.25, 67.15], [-18.18, 67.18], [-18.03, 67.53], [-17.5, 67.75], [-16.97, 67.53], [-16.82, 67.18], [-16.75, 67.15], [-16.5, 67.25], [-16.25, 67.15], [-16.0, 67.25], [-15.75, 67.15], [-15.68, 67.18], [-15.53, 67.53], [-15.0, 67.75], [-14.47, 67.53], [-14.25, 67.0], [-14.35, 66.75], [-14.32, 66.68], [-13.97, 66.53], [-13.82, 66.18], [-13.75, 66.15], [-13.5, 66.25], [-12.97, 66.03], [-12.75, 65.5], [-12.97, 64.97], [-13.5, 64.75], [-13.75, 64.85], [-13.82, 64.82], [-13.97, 64.47], [-14.5, 64.25], [-14.75, 64.35], [-15.0, 64.25], [-15.25, 64.35], [-15.5, 64.25], [-15.75, 64.35], [-16.0, 64.25], [-16.25, 64.35], [-16.5, 64.25], [-16.75, 64.35], [-17.0, 64.25], [-17.25, 64.35], [-17.32, 64.32], [-17.47, 63.97], [-18.0, 63.75], [-18.25, 63.85], [-18.5, 63.75], [-18.75, 63.85], [-19.0, 63.75], [-19.5, 63.96], [-20.0, 63.75], [-20.25, 63.85], [-20.32, 63.82], [-20.47, 63.47], [-21.0, 63.25], [-21.25, 63.35], [-21.5, 63.25], [-21.75, 63.35], [-22.0, 63.25], [-22.25, 63.35], [-22.5, 63.25], [-23.03, 63.47], [-23.25, 64.0], [-23.15, 64.25], [-23.25, 64.5], [-23.03, 65.03]]]]}, "2013-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-22.53, 63.47], [-22.75, 64.0], [-22.53, 64.53], [-22.0, 64.75], [-21.75, 64.65], [-21.5, 64.75], [-21.25, 64.65], [-21.0, 64.75], [-20.47, 64.53], [-20.25, 64.0], [-20.47, 63.47], [-21.0, 63.25], [-21.25, 63.35], [-21.5, 63.25], [-21.75, 63.35], [-22.0, 63.25], [-22.53, 63.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.104381756150872}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7391909127925684}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.854179277630067, 5.524147399786784, 5.134817498072152, 5.978362923296515, 7.091009803973293, 5.8845840965364005, 5.457911519725656, 5.793217289385609, 9.551422444839034]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.475859957196064, 3.854194794023954, 3.3317437684812603, 3.6442926353510643, 6.852022366182325, 3.118097576132982, 2.748669411799824, 2.5266513748032935, 9.243415166896057]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8476679618188996, -4.413234613495845, -4.748008310227979, -3.792225928880626, -3.173935482472146, -3.451655796298946, -3.904715986573687, -3.4924010495931923, -1.9033018589645583]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.91572402974964, -5.554823978979982, -5.6328025606249525, -4.654548949510286, -3.593415570730656, -5.4784385137998015, -6.104381756150872, -5.792282789870399, -1.9990498466054873]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3655721125128584, -1.8533165014883966, -2.043857099353171, -1.6282384076067598, -1.4260850740221922, -1.8553895377207612, -2.0820104891138187, -1.7715061249672006, -1.3876682510587173]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3768997438512403, -2.1131242909404033, -2.2017554195846083, -1.9396969096247125, -1.4883504037614967, -2.2823306779334533, -2.6850868175143576, -2.2163268586730664, -1.4504541444147705]}}