{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:27.524555", "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": "2010-Apr-18_to_2010-Apr-24_7.0_61.0"}, "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": 2010040000523}, "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": "April 18 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 24 2010"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 57504.36318692161}, "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": ["Norway"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe"]}, "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": ["North Sea"]}, "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": 61.0}, "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": 7.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "7.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 5.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 9.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.35, 61.25], [5.25, 61.5], [5.47, 62.03], [6.0, 62.25], [6.25, 62.15], [6.5, 62.25], [6.75, 62.15], [6.82, 62.18], [6.97, 62.53], [7.5, 62.75], [7.75, 62.65], [8.0, 62.75], [8.53, 62.53], [8.68, 62.18], [9.03, 62.03], [9.25, 61.5], [9.03, 60.97], [8.68, 60.82], [8.65, 60.75], [8.75, 60.5], [8.53, 59.97], [8.0, 59.75], [7.75, 59.85], [7.62, 59.8], [7.75, 59.5], [7.53, 58.97], [7.18, 58.82], [7.03, 58.47], [6.5, 58.25], [5.97, 58.47], [5.75, 59.0], [5.85, 59.25], [5.75, 59.5], [5.85, 59.75], [5.82, 59.82], [5.47, 59.97], [5.25, 60.5], [5.35, 60.75], [5.25, 61.0], [5.35, 61.25]]]]}, "2010-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.35, 61.25], [5.25, 61.5], [5.47, 62.03], [6.0, 62.25], [6.25, 62.15], [6.5, 62.25], [6.75, 62.15], [6.82, 62.18], [6.97, 62.53], [7.5, 62.75], [7.75, 62.65], [8.0, 62.75], [8.53, 62.53], [8.68, 62.18], [9.03, 62.03], [9.25, 61.5], [9.15, 61.25], [9.18, 61.18], [9.53, 61.03], [9.75, 60.5], [9.65, 60.25], [9.75, 60.0], [9.53, 59.47], [9.18, 59.32], [9.03, 58.97], [8.5, 58.75], [8.25, 58.85], [8.0, 58.75], [7.75, 58.85], [7.68, 58.82], [7.53, 58.47], [7.0, 58.25], [6.75, 58.35], [6.5, 58.25], [5.97, 58.47], [5.75, 59.0], [5.85, 59.25], [5.75, 59.5], [5.85, 59.75], [5.82, 59.82], [5.47, 59.97], [5.25, 60.5], [5.35, 60.75], [5.25, 61.0], [5.35, 61.25]]]]}, "2010-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.35, 61.25], [5.25, 61.5], [5.47, 62.03], [6.0, 62.25], [6.25, 62.15], [6.5, 62.25], [6.75, 62.15], [6.82, 62.18], [6.97, 62.53], [7.5, 62.75], [7.75, 62.65], [8.0, 62.75], [8.53, 62.53], [8.68, 62.18], [9.03, 62.03], [9.25, 61.5], [9.15, 61.25], [9.18, 61.18], [9.53, 61.03], [9.75, 60.5], [9.65, 60.25], [9.75, 60.0], [9.53, 59.47], [9.18, 59.32], [9.03, 58.97], [8.5, 58.75], [8.25, 58.85], [8.0, 58.75], [7.75, 58.85], [7.68, 58.82], [7.53, 58.47], [7.0, 58.25], [6.75, 58.35], [6.5, 58.25], [5.97, 58.47], [5.75, 59.0], [5.85, 59.25], [5.75, 59.5], [5.85, 59.75], [5.82, 59.82], [5.47, 59.97], [5.25, 60.5], [5.35, 60.75], [5.25, 61.0], [5.35, 61.25]]]]}, "2010-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.25, 61.5], [5.47, 62.03], [6.0, 62.25], [6.25, 62.15], [6.32, 62.18], [6.47, 62.53], [7.0, 62.75], [7.25, 62.65], [7.5, 62.75], [7.75, 62.65], [8.0, 62.75], [8.53, 62.53], [8.68, 62.18], [9.03, 62.03], [9.25, 61.5], [9.15, 61.25], [9.18, 61.18], [9.53, 61.03], [9.75, 60.5], [9.65, 60.25], [9.75, 60.0], [9.53, 59.47], [9.18, 59.32], [9.03, 58.97], [8.5, 58.75], [8.25, 58.85], [8.0, 58.75], [7.75, 58.85], [7.68, 58.82], [7.53, 58.47], [7.0, 58.25], [6.75, 58.35], [6.5, 58.25], [5.97, 58.47], [5.75, 59.0], [5.97, 59.53], [6.38, 59.7], [6.32, 59.82], [5.97, 59.97], [5.75, 60.5], [5.85, 60.75], [5.82, 60.82], [5.47, 60.97], [5.25, 61.5]]]]}, "2010-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.85, 61.25], [5.75, 61.5], [5.97, 62.03], [6.32, 62.18], [6.47, 62.53], [7.0, 62.75], [7.25, 62.65], [7.5, 62.75], [7.75, 62.65], [7.82, 62.68], [7.97, 63.03], [8.5, 63.25], [9.03, 63.03], [9.25, 62.5], [9.15, 62.25], [9.18, 62.18], [9.53, 62.03], [9.75, 61.5], [9.54, 61.0], [9.75, 60.5], [9.65, 60.25], [9.75, 60.0], [9.53, 59.47], [9.0, 59.25], [8.75, 59.35], [8.5, 59.25], [8.25, 59.35], [8.18, 59.32], [8.03, 58.97], [7.68, 58.82], [7.53, 58.47], [7.0, 58.25], [6.75, 58.35], [6.5, 58.25], [5.97, 58.47], [5.75, 59.0], [5.97, 59.53], [6.5, 59.75], [5.97, 59.97], [5.75, 60.5], [5.85, 60.75], [5.75, 61.0], [5.85, 61.25]], [[6.75, 59.65], [6.82, 59.68], [6.85, 59.75], [6.82, 59.82], [6.75, 59.85], [6.5, 59.75], [6.75, 59.65]]]]}, "2010-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.85, 61.25], [5.75, 61.5], [5.97, 62.03], [6.32, 62.18], [6.47, 62.53], [7.0, 62.75], [7.25, 62.65], [7.5, 62.75], [7.75, 62.65], [7.82, 62.68], [7.97, 63.03], [8.5, 63.25], [9.03, 63.03], [9.25, 62.5], [9.15, 62.25], [9.18, 62.18], [9.53, 62.03], [9.75, 61.5], [9.54, 61.0], [9.75, 60.5], [9.65, 60.25], [9.75, 60.0], [9.53, 59.47], [9.0, 59.25], [8.75, 59.35], [8.5, 59.25], [8.25, 59.35], [8.18, 59.32], [8.03, 58.97], [7.68, 58.82], [7.53, 58.47], [7.0, 58.25], [6.75, 58.35], [6.5, 58.25], [5.97, 58.47], [5.75, 59.0], [5.97, 59.53], [6.5, 59.75], [5.97, 59.97], [5.75, 60.5], [5.85, 60.75], [5.75, 61.0], [5.85, 61.25]], [[6.75, 59.65], [6.82, 59.68], [6.85, 59.75], [6.82, 59.82], [6.75, 59.85], [6.5, 59.75], [6.75, 59.65]]]]}, "2010-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.5, 63.25], [9.03, 63.03], [9.25, 62.5], [9.15, 62.25], [9.18, 62.18], [9.53, 62.03], [9.75, 61.5], [9.53, 60.97], [9.0, 60.75], [8.47, 60.97], [8.32, 61.32], [8.25, 61.35], [8.0, 61.25], [7.47, 61.47], [7.25, 62.0], [7.47, 62.53], [7.82, 62.68], [7.97, 63.03], [8.5, 63.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.3707044016364875}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.358466120228077}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.064854368328554, -5.3821525354012465, -4.73300531359348, -4.664957940548845, -4.873103800585909, -4.647169814378856, -5.441912845259367]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.429585853699962, -9.049888888801831, -8.06863084518659, -7.600376685066806, -8.265703260123189, -7.966582534208101, -6.239337920316018]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.225850826755487, -5.6750551675096, -5.263828650798231, -5.34004892416876, -5.634709908251327, -5.654706437811932, -5.688881027381555]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.847820788221895, -7.3707044016364875, -6.756719401858334, -6.955116584964912, -7.081857747509844, -6.698465847789805, -6.165731436548242]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.504759509838891, -1.962883496451156, -1.7624839064849531, -1.734872859912307, -1.8008338109513335, -1.851861601211449, -1.8082269195349703]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7468682560120914, -2.4263748792929216, -2.190635520422123, -2.220680220708297, -2.0775915876837265, -2.0593942357462023, -1.996589012989466]}}