{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:32.073017", "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": "2018-Nov-27_to_2018-Nov-29_279.5_28.5"}, "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": 2018110000840}, "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": "November 27 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 29 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 98013.111774735}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "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": ["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": 28.5}, "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": 279.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "279.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 278.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 281.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.15, 30.75], [-82.25, 31.0], [-82.15, 31.25], [-82.25, 31.5], [-82.03, 32.03], [-81.68, 32.18], [-81.53, 32.53], [-81.18, 32.68], [-81.03, 33.03], [-80.5, 33.25], [-80.25, 33.15], [-80.18, 33.18], [-80.03, 33.53], [-79.5, 33.75], [-79.25, 33.65], [-79.0, 33.75], [-78.47, 33.53], [-78.25, 33.0], [-78.35, 32.75], [-78.25, 32.5], [-78.35, 32.25], [-78.25, 32.0], [-78.35, 31.75], [-78.25, 31.5], [-78.47, 30.97], [-78.82, 30.82], [-78.85, 30.75], [-78.75, 30.5], [-78.97, 29.97], [-79.32, 29.82], [-79.35, 29.75], [-79.25, 29.5], [-79.46, 29.0], [-79.25, 28.5], [-79.47, 27.97], [-80.0, 27.75], [-80.25, 27.85], [-80.5, 27.75], [-81.03, 27.97], [-81.25, 28.5], [-81.15, 28.75], [-81.18, 28.82], [-81.53, 28.97], [-81.68, 29.32], [-82.03, 29.47], [-82.25, 30.0], [-82.15, 30.25], [-82.25, 30.5], [-82.15, 30.75]]]]}, "2018-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.15, 30.75], [-82.25, 31.0], [-82.15, 31.25], [-82.25, 31.5], [-82.03, 32.03], [-81.68, 32.18], [-81.53, 32.53], [-81.18, 32.68], [-81.03, 33.03], [-80.5, 33.25], [-80.25, 33.15], [-80.18, 33.18], [-80.03, 33.53], [-79.5, 33.75], [-79.25, 33.65], [-79.0, 33.75], [-78.47, 33.53], [-78.25, 33.0], [-78.35, 32.75], [-78.25, 32.5], [-78.35, 32.25], [-78.25, 32.0], [-78.35, 31.75], [-78.25, 31.5], [-78.47, 30.97], [-78.82, 30.82], [-78.85, 30.75], [-78.75, 30.5], [-78.97, 29.97], [-79.32, 29.82], [-79.35, 29.75], [-79.25, 29.5], [-79.46, 29.0], [-79.25, 28.5], [-79.47, 27.97], [-80.0, 27.75], [-80.25, 27.85], [-80.5, 27.75], [-81.03, 27.97], [-81.25, 28.5], [-81.15, 28.75], [-81.18, 28.82], [-81.53, 28.97], [-81.68, 29.32], [-82.03, 29.47], [-82.25, 30.0], [-82.15, 30.25], [-82.25, 30.5], [-82.15, 30.75]]]]}, "2018-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.15, 30.75], [-82.25, 31.0], [-82.15, 31.25], [-82.25, 31.5], [-82.03, 32.03], [-81.68, 32.18], [-81.53, 32.53], [-81.18, 32.68], [-81.03, 33.03], [-80.5, 33.25], [-80.25, 33.15], [-80.18, 33.18], [-80.03, 33.53], [-79.5, 33.75], [-79.25, 33.65], [-79.0, 33.75], [-78.47, 33.53], [-78.25, 33.0], [-78.35, 32.75], [-78.25, 32.5], [-78.35, 32.25], [-78.25, 32.0], [-78.35, 31.75], [-78.25, 31.5], [-78.47, 30.97], [-78.82, 30.82], [-78.85, 30.75], [-78.75, 30.5], [-78.97, 29.97], [-79.32, 29.82], [-79.35, 29.75], [-79.25, 29.5], [-79.46, 29.0], [-79.25, 28.5], [-79.47, 27.97], [-80.0, 27.75], [-80.25, 27.85], [-80.5, 27.75], [-81.03, 27.97], [-81.25, 28.5], [-81.15, 28.75], [-81.18, 28.82], [-81.53, 28.97], [-81.68, 29.32], [-82.03, 29.47], [-82.25, 30.0], [-82.15, 30.25], [-82.25, 30.5], [-82.15, 30.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.511050171379168}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.875075988695844}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.246092477752427, 9.993262372461913, 12.176485453835085]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.227857869793013, 5.3882424080776445, 7.2145952504325805]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.435586335356132, -8.723640904567237, -6.46600072616416]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.381858447814636, -9.511050171379168, -7.709410900605974]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7859221240832226, -2.8558520922657, -2.031236314607962]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0992902832308866, -3.7575991645218734, -2.5983409310254095]}}