{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:52.254852", "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": "2017-Sep-18_to_2017-Sep-23_15.5_40.0"}, "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": 2017090000529}, "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": "September 18 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 23 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 85690.30605902284}, "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": ["Italy"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "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": ["Ionian Sea", "Tyrrhenian 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": 40.0}, "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": 15.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "15.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 10.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[10.5, 44.75], [11.03, 44.53], [11.25, 44.0], [11.03, 43.47], [10.5, 43.25], [9.97, 43.47], [9.75, 44.0], [9.97, 44.53], [10.5, 44.75]]]]}, "2017-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.75, 44.0], [9.97, 44.53], [10.5, 44.75], [10.75, 44.65], [11.0, 44.75], [11.53, 44.53], [11.75, 44.0], [11.65, 43.75], [11.68, 43.68], [11.8, 43.63], [11.97, 44.03], [12.5, 44.25], [12.75, 44.15], [13.0, 44.25], [13.25, 44.15], [13.5, 44.25], [14.03, 44.03], [14.25, 43.5], [14.03, 42.97], [13.68, 42.82], [13.65, 42.75], [13.68, 42.68], [14.03, 42.53], [14.18, 42.18], [14.25, 42.15], [14.5, 42.25], [15.03, 42.03], [15.25, 41.5], [15.07, 41.07], [15.5, 41.25], [16.03, 41.03], [16.25, 40.5], [16.15, 40.25], [16.25, 40.0], [16.03, 39.47], [15.5, 39.25], [14.97, 39.47], [14.75, 40.0], [14.85, 40.25], [14.75, 40.5], [14.93, 40.93], [14.5, 40.75], [14.25, 40.85], [14.0, 40.75], [13.5, 40.96], [13.0, 40.75], [12.75, 40.85], [12.5, 40.75], [11.97, 40.97], [11.82, 41.32], [11.47, 41.47], [11.32, 41.82], [10.97, 41.97], [10.82, 42.32], [10.47, 42.47], [10.25, 43.0], [10.35, 43.25], [10.32, 43.32], [9.97, 43.47], [9.75, 44.0]]]]}, "2017-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.75, 44.0], [9.97, 44.53], [10.5, 44.75], [10.75, 44.65], [11.0, 44.75], [11.53, 44.53], [11.75, 44.0], [11.65, 43.75], [11.68, 43.68], [11.8, 43.63], [11.97, 44.03], [12.5, 44.25], [12.75, 44.15], [13.0, 44.25], [13.25, 44.15], [13.5, 44.25], [14.03, 44.03], [14.25, 43.5], [14.03, 42.97], [13.68, 42.82], [13.65, 42.75], [13.68, 42.68], [14.03, 42.53], [14.18, 42.18], [14.25, 42.15], [14.5, 42.25], [15.03, 42.03], [15.25, 41.5], [15.15, 41.25], [15.18, 41.18], [15.25, 41.15], [15.5, 41.25], [16.0, 41.04], [16.5, 41.25], [17.03, 41.03], [17.25, 40.5], [17.04, 40.0], [17.25, 39.5], [17.15, 39.25], [17.25, 39.0], [17.03, 38.47], [16.68, 38.32], [16.65, 38.25], [16.75, 38.0], [16.53, 37.47], [16.0, 37.25], [15.75, 37.35], [15.5, 37.25], [15.25, 37.35], [15.0, 37.25], [14.47, 37.47], [14.25, 38.0], [14.47, 38.53], [15.0, 38.75], [15.25, 38.65], [15.32, 38.68], [15.46, 39.0], [15.32, 39.32], [14.97, 39.47], [14.82, 39.82], [14.47, 39.97], [14.32, 40.32], [14.25, 40.35], [14.0, 40.25], [13.47, 40.47], [13.32, 40.82], [13.25, 40.85], [13.0, 40.75], [12.75, 40.85], [12.5, 40.75], [11.97, 40.97], [11.82, 41.32], [11.47, 41.47], [11.32, 41.82], [10.97, 41.97], [10.82, 42.32], [10.47, 42.47], [10.25, 43.0], [10.35, 43.25], [10.32, 43.32], [9.97, 43.47], [9.75, 44.0]]]]}, "2017-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.75, 44.0], [9.97, 44.53], [10.5, 44.75], [10.75, 44.65], [11.0, 44.75], [11.53, 44.53], [11.75, 44.0], [11.65, 43.75], [11.68, 43.68], [11.8, 43.63], [11.97, 44.03], [12.5, 44.25], [12.75, 44.15], [13.0, 44.25], [13.25, 44.15], [13.5, 44.25], [14.03, 44.03], [14.25, 43.5], [14.03, 42.97], [13.68, 42.82], [13.65, 42.75], [13.68, 42.68], [14.03, 42.53], [14.18, 42.18], [14.25, 42.15], [14.5, 42.25], [15.03, 42.03], [15.25, 41.5], [15.15, 41.25], [15.18, 41.18], [15.25, 41.15], [15.5, 41.25], [16.0, 41.04], [16.5, 41.25], [17.03, 41.03], [17.25, 40.5], [17.04, 40.0], [17.25, 39.5], [17.15, 39.25], [17.25, 39.0], [17.03, 38.47], [16.68, 38.32], [16.65, 38.25], [16.75, 38.0], [16.53, 37.47], [16.0, 37.25], [15.75, 37.35], [15.5, 37.25], [15.25, 37.35], [15.0, 37.25], [14.47, 37.47], [14.25, 38.0], [14.47, 38.53], [15.0, 38.75], [15.25, 38.65], [15.32, 38.68], [15.46, 39.0], [15.32, 39.32], [14.97, 39.47], [14.82, 39.82], [14.47, 39.97], [14.32, 40.32], [14.25, 40.35], [14.0, 40.25], [13.47, 40.47], [13.32, 40.82], [13.25, 40.85], [13.0, 40.75], [12.75, 40.85], [12.5, 40.75], [11.97, 40.97], [11.82, 41.32], [11.47, 41.47], [11.32, 41.82], [10.97, 41.97], [10.82, 42.32], [10.47, 42.47], [10.25, 43.0], [10.35, 43.25], [10.32, 43.32], [9.97, 43.47], [9.75, 44.0]]]]}, "2017-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.97, 42.53], [12.5, 42.75], [13.03, 42.53], [13.18, 42.18], [13.25, 42.15], [13.5, 42.25], [13.75, 42.15], [14.0, 42.25], [14.53, 42.03], [14.68, 41.68], [15.03, 41.53], [15.18, 41.18], [15.25, 41.15], [15.5, 41.25], [16.0, 41.04], [16.5, 41.25], [17.03, 41.03], [17.25, 40.5], [17.04, 40.0], [17.25, 39.5], [17.15, 39.25], [17.25, 39.0], [17.03, 38.47], [16.68, 38.32], [16.65, 38.25], [16.75, 38.0], [16.53, 37.47], [16.0, 37.25], [15.75, 37.35], [15.5, 37.25], [15.25, 37.35], [15.0, 37.25], [14.47, 37.47], [14.25, 38.0], [14.47, 38.53], [15.0, 38.75], [15.25, 38.65], [15.32, 38.68], [15.46, 39.0], [15.32, 39.32], [14.97, 39.47], [14.82, 39.82], [14.47, 39.97], [14.32, 40.32], [14.25, 40.35], [14.0, 40.25], [13.47, 40.47], [13.32, 40.82], [13.25, 40.85], [13.0, 40.75], [12.47, 40.97], [12.32, 41.32], [11.97, 41.47], [11.75, 42.0], [11.97, 42.53]]], [[[9.97, 43.47], [9.75, 44.0], [9.97, 44.53], [10.5, 44.75], [11.03, 44.53], [11.25, 44.0], [11.03, 43.47], [10.5, 43.25], [9.97, 43.47]]]]}, "2017-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.5, 40.75], [16.03, 40.53], [16.25, 40.0], [16.03, 39.47], [15.5, 39.25], [14.97, 39.47], [14.75, 40.0], [14.97, 40.53], [15.5, 40.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.77747926086613}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.8714027000094533}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.457912907211721, 14.738533324027344, 14.559220555463696, 14.97194571596475, 16.105679644072666, 17.25470440310272]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.457912907211721, 10.941025794891118, 8.525472514249827, 10.143667308833017, 12.955761817742484, 17.25470440310272]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.35538809806269, -3.799058828278639, -4.395913298411066, -3.8288885295675503, -3.1117227661958724, -2.7237211314445062]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.35538809806269, -4.920213726503505, -6.77747926086613, -4.846544815378309, -3.8184441751319014, -2.7237211314445062]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3958707853121364, -1.5932456541331816, -1.9540182491613787, -1.7488641847536022, -1.5062533134812766, -1.429256553313571]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3958707853121364, -1.9600729348250305, -2.6229156380376337, -2.2171471771842355, -1.9179608706886846, -1.429256553313571]}}