{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:35.761939", "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": "2022-Mar-05_to_2022-Mar-09_15.5_41.0"}, "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": 2022030000224}, "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": "March 05 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 09 2022"}, "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": 61679.89770286047}, "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"]}, "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": ["Tyrrhenian Basin", "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": 41.0}, "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": 13.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 38.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[13.0, 40.75], [13.25, 40.65], [13.38, 40.7], [13.25, 41.0], [13.47, 41.53], [13.82, 41.68], [13.97, 42.03], [14.5, 42.25], [15.03, 42.03], [15.18, 41.68], [15.25, 41.65], [15.5, 41.75], [16.03, 41.53], [16.18, 41.18], [16.53, 41.03], [16.75, 40.5], [16.53, 39.97], [16.13, 39.8], [16.18, 39.68], [16.53, 39.53], [16.75, 39.0], [16.53, 38.47], [16.18, 38.32], [16.03, 37.97], [15.5, 37.75], [15.25, 37.85], [15.0, 37.75], [14.75, 37.85], [14.5, 37.75], [13.97, 37.97], [13.82, 38.32], [13.75, 38.35], [13.5, 38.25], [12.97, 38.47], [12.75, 39.0], [12.85, 39.25], [12.82, 39.32], [12.47, 39.47], [12.25, 40.0], [12.47, 40.53], [13.0, 40.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.97, 41.53], [15.5, 41.75], [16.03, 41.53], [16.25, 41.0], [16.03, 40.47], [15.5, 40.25], [15.2, 40.38], [15.03, 39.97], [14.5, 39.75], [13.97, 39.97], [13.75, 40.5], [13.97, 41.03], [14.5, 41.25], [14.8, 41.13], [14.97, 41.53]]]]}, "2022-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.47, 39.47], [12.25, 40.0], [12.47, 40.53], [13.0, 40.75], [13.25, 40.65], [13.38, 40.7], [13.25, 41.0], [13.47, 41.53], [14.0, 41.75], [14.53, 41.53], [14.68, 41.18], [14.8, 41.13], [14.97, 41.53], [15.5, 41.75], [16.03, 41.53], [16.25, 41.0], [16.03, 40.47], [15.5, 40.25], [15.2, 40.38], [15.15, 40.25], [15.18, 40.18], [15.53, 40.03], [15.75, 39.5], [15.53, 38.97], [15.0, 38.75], [14.75, 38.85], [14.5, 38.75], [14.25, 38.85], [14.0, 38.75], [13.75, 38.85], [13.5, 38.75], [12.97, 38.97], [12.82, 39.32], [12.47, 39.47]]]]}, "2022-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.47, 39.47], [12.25, 40.0], [12.47, 40.53], [13.0, 40.75], [13.25, 40.65], [13.38, 40.7], [13.25, 41.0], [13.47, 41.53], [13.82, 41.68], [13.97, 42.03], [14.5, 42.25], [15.03, 42.03], [15.18, 41.68], [15.25, 41.65], [15.5, 41.75], [16.03, 41.53], [16.18, 41.18], [16.53, 41.03], [16.75, 40.5], [16.53, 39.97], [16.13, 39.8], [16.18, 39.68], [16.53, 39.53], [16.75, 39.0], [16.53, 38.47], [16.18, 38.32], [16.03, 37.97], [15.5, 37.75], [15.25, 37.85], [15.0, 37.75], [14.75, 37.85], [14.5, 37.75], [13.97, 37.97], [13.82, 38.32], [13.75, 38.35], [13.5, 38.25], [12.97, 38.47], [12.75, 39.0], [12.85, 39.25], [12.82, 39.32], [12.47, 39.47]]]]}, "2022-03-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.47, 39.47], [12.25, 40.0], [12.47, 40.53], [13.0, 40.75], [13.25, 40.65], [13.38, 40.7], [13.25, 41.0], [13.47, 41.53], [13.82, 41.68], [13.97, 42.03], [14.5, 42.25], [15.03, 42.03], [15.18, 41.68], [15.25, 41.65], [15.5, 41.75], [16.03, 41.53], [16.18, 41.18], [16.53, 41.03], [16.75, 40.5], [16.53, 39.97], [16.13, 39.8], [16.18, 39.68], [16.53, 39.53], [16.75, 39.0], [16.53, 38.47], [16.18, 38.32], [16.03, 37.97], [15.5, 37.75], [15.25, 37.85], [15.0, 37.75], [14.75, 37.85], [14.5, 37.75], [13.97, 37.97], [13.82, 38.32], [13.75, 38.35], [13.5, 38.25], [12.97, 38.47], [12.75, 39.0], [12.85, 39.25], [12.82, 39.32], [12.47, 39.47]]]]}, "2022-03-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.47, 39.47], [12.25, 40.0], [12.47, 40.53], [13.0, 40.75], [13.25, 40.65], [13.5, 40.75], [13.75, 40.65], [13.82, 40.68], [13.85, 40.75], [13.75, 41.0], [13.85, 41.25], [13.75, 41.5], [13.97, 42.03], [14.5, 42.25], [15.03, 42.03], [15.18, 41.68], [15.25, 41.65], [15.5, 41.75], [16.03, 41.53], [16.18, 41.18], [16.53, 41.03], [16.75, 40.5], [16.53, 39.97], [16.13, 39.8], [16.18, 39.68], [16.53, 39.53], [16.75, 39.0], [16.53, 38.47], [16.18, 38.32], [16.03, 37.97], [15.5, 37.75], [15.25, 37.85], [15.0, 37.75], [14.75, 37.85], [14.5, 37.75], [13.97, 37.97], [13.82, 38.32], [13.75, 38.35], [13.5, 38.25], [12.97, 38.47], [12.75, 39.0], [12.85, 39.25], [12.82, 39.32], [12.47, 39.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.3682740891880485}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.5425884112867063}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.644077241371406, 9.253225479504408, 8.06495638838453, 6.799812540670416, 7.902800146349364]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.335156423152455, 2.787180909447841, 0.5612001526533845, -1.7810315956229488, -0.1645220563054295]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.430170574488187, -2.9255929289877414, -3.201155255664011, -4.36912293039858, -3.2385544324133866]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.602872371756803, -5.029156485575584, -5.428130045613898, -7.3682740891880485, -5.715372773424349]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5844963916368529, -1.4310584905945058, -1.4526351233357202, -2.0040625520064808, -1.5775689377439406]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.629805056947011, -1.4881728265119951, -1.732172195204046, -2.196283273252662, -1.7724443979143463]}}