{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:35:30.443456", "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": "2023-Jun-04_to_2023-Jun-06_260.5_26.5"}, "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": 2023060000203}, "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": "June 04 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 06 2023"}, "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": 82502.4335660113}, "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": ["Mexico", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Central-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": []}, "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": 26.5}, "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": 260.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "260.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 262.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.65, 28.25], [-101.75, 28.5], [-101.53, 29.03], [-101.0, 29.25], [-100.75, 29.15], [-100.68, 29.18], [-100.53, 29.53], [-100.0, 29.75], [-99.47, 29.53], [-99.32, 29.18], [-98.97, 29.03], [-98.75, 28.5], [-98.93, 28.07], [-98.5, 28.25], [-98.25, 28.15], [-98.18, 28.18], [-98.03, 28.53], [-97.5, 28.75], [-96.97, 28.53], [-96.75, 28.0], [-96.97, 27.47], [-97.32, 27.32], [-97.35, 27.25], [-97.32, 27.18], [-96.97, 27.03], [-96.75, 26.5], [-96.97, 25.97], [-97.32, 25.82], [-97.47, 25.47], [-98.0, 25.25], [-98.25, 25.35], [-98.32, 25.32], [-98.35, 25.25], [-98.25, 25.0], [-98.47, 24.47], [-99.0, 24.25], [-99.53, 24.47], [-99.75, 25.0], [-99.65, 25.25], [-99.68, 25.32], [-100.03, 25.47], [-100.25, 26.0], [-100.15, 26.25], [-100.18, 26.32], [-100.25, 26.35], [-100.5, 26.25], [-101.03, 26.47], [-101.18, 26.82], [-101.53, 26.97], [-101.75, 27.5], [-101.65, 27.75], [-101.75, 28.0], [-101.65, 28.25]], [[-99.07, 27.93], [-99.32, 27.82], [-99.35, 27.75], [-99.32, 27.68], [-99.2, 27.62], [-99.07, 27.93]]]]}, "2023-06-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.65, 28.25], [-101.75, 28.5], [-101.53, 29.03], [-101.0, 29.25], [-100.75, 29.15], [-100.68, 29.18], [-100.53, 29.53], [-100.0, 29.75], [-99.47, 29.53], [-99.32, 29.18], [-98.97, 29.03], [-98.75, 28.5], [-98.93, 28.07], [-98.5, 28.25], [-98.25, 28.15], [-98.18, 28.18], [-98.03, 28.53], [-97.5, 28.75], [-96.97, 28.53], [-96.75, 28.0], [-96.97, 27.47], [-97.32, 27.32], [-97.35, 27.25], [-97.32, 27.18], [-96.97, 27.03], [-96.75, 26.5], [-96.97, 25.97], [-97.32, 25.82], [-97.47, 25.47], [-98.0, 25.25], [-98.25, 25.35], [-98.32, 25.32], [-98.35, 25.25], [-98.25, 25.0], [-98.47, 24.47], [-99.0, 24.25], [-99.53, 24.47], [-99.75, 25.0], [-99.65, 25.25], [-99.68, 25.32], [-100.03, 25.47], [-100.25, 26.0], [-100.15, 26.25], [-100.18, 26.32], [-100.25, 26.35], [-100.5, 26.25], [-101.03, 26.47], [-101.18, 26.82], [-101.53, 26.97], [-101.75, 27.5], [-101.65, 27.75], [-101.75, 28.0], [-101.65, 28.25]], [[-99.07, 27.93], [-99.32, 27.82], [-99.35, 27.75], [-99.32, 27.68], [-99.2, 27.62], [-99.07, 27.93]]]]}, "2023-06-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.65, 28.25], [-101.75, 28.5], [-101.53, 29.03], [-101.0, 29.25], [-100.75, 29.15], [-100.68, 29.18], [-100.53, 29.53], [-100.0, 29.75], [-99.47, 29.53], [-99.32, 29.18], [-98.97, 29.03], [-98.75, 28.5], [-98.93, 28.07], [-98.5, 28.25], [-98.25, 28.15], [-98.18, 28.18], [-98.03, 28.53], [-97.5, 28.75], [-96.97, 28.53], [-96.75, 28.0], [-96.97, 27.47], [-97.32, 27.32], [-97.35, 27.25], [-97.32, 27.18], [-96.97, 27.03], [-96.75, 26.5], [-96.97, 25.97], [-97.32, 25.82], [-97.47, 25.47], [-98.0, 25.25], [-98.25, 25.35], [-98.32, 25.32], [-98.35, 25.25], [-98.25, 25.0], [-98.47, 24.47], [-99.0, 24.25], [-99.53, 24.47], [-99.75, 25.0], [-99.65, 25.25], [-99.68, 25.32], [-100.03, 25.47], [-100.25, 26.0], [-100.15, 26.25], [-100.18, 26.32], [-100.25, 26.35], [-100.5, 26.25], [-101.03, 26.47], [-101.18, 26.82], [-101.53, 26.97], [-101.75, 27.5], [-101.65, 27.75], [-101.75, 28.0], [-101.65, 28.25]], [[-99.07, 27.93], [-99.32, 27.82], [-99.35, 27.75], [-99.32, 27.68], [-99.2, 27.62], [-99.07, 27.93]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.975522343231148}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.588146784976451}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.634714332730084, 26.222565903578527, 26.232383923817736]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.48069862212168, 24.880442810134298, 24.801745625918045]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.900791334946297, -3.3914389328669188, -3.472210087116137]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.975522343231148, -4.194981169097787, -4.345377563334807]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.958533129512062, -1.772691303360422, -1.8022686841008475]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.576611283334851, -2.1700667989066393, -2.264464936722372]}}