{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:35:35.284877", "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-21_to_2023-Jun-23_277.5_35.0"}, "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": 2023060000680}, "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 21 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 23 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": 113912.45029879696}, "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": []}, "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": 35.0}, "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": 277.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "277.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 273.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 279.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.03, 35.53], [-86.62, 35.7], [-86.75, 36.0], [-86.65, 36.25], [-86.75, 36.5], [-86.65, 36.75], [-86.75, 37.0], [-86.53, 37.53], [-86.0, 37.75], [-85.75, 37.65], [-85.5, 37.75], [-85.25, 37.65], [-85.0, 37.75], [-84.47, 37.53], [-84.32, 37.18], [-83.97, 37.03], [-83.75, 36.5], [-83.96, 36.0], [-83.75, 35.5], [-83.85, 35.25], [-83.82, 35.18], [-83.75, 35.15], [-83.68, 35.18], [-83.53, 35.53], [-83.0, 35.75], [-82.75, 35.65], [-82.68, 35.68], [-82.53, 36.03], [-82.0, 36.25], [-81.75, 36.15], [-81.5, 36.25], [-81.25, 36.15], [-81.0, 36.25], [-80.47, 36.03], [-80.25, 35.5], [-80.35, 35.25], [-80.25, 35.0], [-80.35, 34.75], [-80.25, 34.5], [-80.47, 33.97], [-81.0, 33.75], [-81.25, 33.85], [-81.32, 33.82], [-81.47, 33.47], [-82.0, 33.25], [-82.25, 33.35], [-82.32, 33.32], [-82.47, 32.97], [-83.0, 32.75], [-83.25, 32.85], [-83.5, 32.75], [-84.03, 32.97], [-84.18, 33.32], [-84.25, 33.35], [-84.5, 33.25], [-84.75, 33.35], [-85.0, 33.25], [-85.53, 33.47], [-85.68, 33.82], [-85.75, 33.85], [-86.0, 33.75], [-86.25, 33.85], [-86.5, 33.75], [-87.03, 33.97], [-87.25, 34.5], [-87.15, 34.75], [-87.25, 35.0], [-87.03, 35.53]]]]}, "2023-06-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.03, 35.53], [-86.62, 35.7], [-86.75, 36.0], [-86.65, 36.25], [-86.75, 36.5], [-86.65, 36.75], [-86.75, 37.0], [-86.53, 37.53], [-86.0, 37.75], [-85.75, 37.65], [-85.5, 37.75], [-85.25, 37.65], [-85.0, 37.75], [-84.47, 37.53], [-84.32, 37.18], [-83.97, 37.03], [-83.75, 36.5], [-83.96, 36.0], [-83.75, 35.5], [-83.85, 35.25], [-83.82, 35.18], [-83.75, 35.15], [-83.68, 35.18], [-83.53, 35.53], [-83.0, 35.75], [-82.75, 35.65], [-82.68, 35.68], [-82.53, 36.03], [-82.0, 36.25], [-81.75, 36.15], [-81.5, 36.25], [-81.25, 36.15], [-81.0, 36.25], [-80.47, 36.03], [-80.25, 35.5], [-80.35, 35.25], [-80.25, 35.0], [-80.35, 34.75], [-80.25, 34.5], [-80.47, 33.97], [-81.0, 33.75], [-81.25, 33.85], [-81.32, 33.82], [-81.47, 33.47], [-82.0, 33.25], [-82.25, 33.35], [-82.32, 33.32], [-82.47, 32.97], [-83.0, 32.75], [-83.25, 32.85], [-83.5, 32.75], [-84.03, 32.97], [-84.18, 33.32], [-84.25, 33.35], [-84.5, 33.25], [-84.75, 33.35], [-85.0, 33.25], [-85.53, 33.47], [-85.68, 33.82], [-85.75, 33.85], [-86.0, 33.75], [-86.25, 33.85], [-86.5, 33.75], [-87.03, 33.97], [-87.25, 34.5], [-87.15, 34.75], [-87.25, 35.0], [-87.03, 35.53]]]]}, "2023-06-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.03, 35.53], [-86.62, 35.7], [-86.75, 36.0], [-86.65, 36.25], [-86.75, 36.5], [-86.65, 36.75], [-86.75, 37.0], [-86.53, 37.53], [-86.0, 37.75], [-85.75, 37.65], [-85.5, 37.75], [-85.25, 37.65], [-85.0, 37.75], [-84.47, 37.53], [-84.32, 37.18], [-83.97, 37.03], [-83.75, 36.5], [-83.96, 36.0], [-83.75, 35.5], [-83.85, 35.25], [-83.82, 35.18], [-83.75, 35.15], [-83.68, 35.18], [-83.53, 35.53], [-83.0, 35.75], [-82.75, 35.65], [-82.68, 35.68], [-82.53, 36.03], [-82.0, 36.25], [-81.75, 36.15], [-81.5, 36.25], [-81.25, 36.15], [-81.0, 36.25], [-80.47, 36.03], [-80.25, 35.5], [-80.35, 35.25], [-80.25, 35.0], [-80.35, 34.75], [-80.25, 34.5], [-80.47, 33.97], [-81.0, 33.75], [-81.25, 33.85], [-81.32, 33.82], [-81.47, 33.47], [-82.0, 33.25], [-82.25, 33.35], [-82.32, 33.32], [-82.47, 32.97], [-83.0, 32.75], [-83.25, 32.85], [-83.5, 32.75], [-84.03, 32.97], [-84.18, 33.32], [-84.25, 33.35], [-84.5, 33.25], [-84.75, 33.35], [-85.0, 33.25], [-85.53, 33.47], [-85.68, 33.82], [-85.75, 33.85], [-86.0, 33.75], [-86.25, 33.85], [-86.5, 33.75], [-87.03, 33.97], [-87.25, 34.5], [-87.15, 34.75], [-87.25, 35.0], [-87.03, 35.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.2436592198124}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.040896146034095}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.834910218936386, 19.58431541195438, 21.74937696461126]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.1809351225599, 16.576578255585105, 19.58633567068813]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.869984308564032, -5.177222141194454, -3.0754819883437965]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.356040183354253, -7.2436592198124, -4.110179651902513]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.812645847605996, -2.4914226271743964, -1.4995792379275947]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2328350226014573, -3.2499765141640946, -2.0353920265242205]}}