{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:53:06.061470", "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": "2024-Sep-06_to_2024-Sep-11_284.0_35.5"}, "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": 2024090000183}, "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 06 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 11 2024"}, "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": 202137.4055596881}, "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": 35.5}, "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": 284.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "284.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 273.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 285.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.75}, "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": {"2024-09-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.53, 32.53], [-83.0, 32.75], [-82.75, 32.65], [-82.5, 32.75], [-81.97, 32.53], [-81.75, 32.0], [-81.97, 31.47], [-82.32, 31.32], [-82.47, 30.97], [-83.0, 30.75], [-83.53, 30.97], [-83.75, 31.5], [-83.65, 31.75], [-83.75, 32.0], [-83.53, 32.53]]]]}, "2024-09-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.53, 30.47], [-86.75, 31.0], [-86.53, 31.53], [-86.0, 31.75], [-85.75, 31.65], [-85.68, 31.68], [-85.53, 32.03], [-85.0, 32.25], [-84.75, 32.15], [-84.5, 32.25], [-84.25, 32.15], [-84.18, 32.18], [-84.03, 32.53], [-83.5, 32.75], [-83.25, 32.65], [-83.0, 32.75], [-82.75, 32.65], [-82.5, 32.75], [-82.25, 32.65], [-82.18, 32.68], [-82.03, 33.03], [-81.5, 33.25], [-81.25, 33.15], [-81.0, 33.25], [-80.75, 33.15], [-80.5, 33.25], [-80.25, 33.15], [-80.0, 33.25], [-79.47, 33.03], [-79.25, 32.5], [-79.47, 31.97], [-80.0, 31.75], [-80.25, 31.85], [-80.32, 31.82], [-80.47, 31.47], [-80.82, 31.32], [-80.97, 30.97], [-81.5, 30.75], [-81.75, 30.85], [-81.82, 30.82], [-81.97, 30.47], [-82.5, 30.25], [-82.75, 30.35], [-83.0, 30.25], [-83.25, 30.35], [-83.5, 30.25], [-83.75, 30.35], [-84.0, 30.25], [-84.25, 30.35], [-84.5, 30.25], [-84.75, 30.35], [-85.0, 30.25], [-85.25, 30.35], [-85.5, 30.25], [-85.75, 30.35], [-86.0, 30.25], [-86.53, 30.47]]]]}, "2024-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.53, 30.47], [-86.75, 31.0], [-86.53, 31.53], [-86.0, 31.75], [-85.75, 31.65], [-85.68, 31.68], [-85.53, 32.03], [-85.0, 32.25], [-84.75, 32.15], [-84.5, 32.25], [-84.25, 32.15], [-84.18, 32.18], [-84.03, 32.53], [-83.5, 32.75], [-83.25, 32.65], [-83.0, 32.75], [-82.75, 32.65], [-82.5, 32.75], [-82.25, 32.65], [-82.18, 32.68], [-82.03, 33.03], [-81.5, 33.25], [-81.25, 33.15], [-81.0, 33.25], [-80.75, 33.15], [-80.68, 33.18], [-80.53, 33.53], [-80.0, 33.75], [-79.75, 33.65], [-79.68, 33.68], [-79.54, 34.0], [-79.68, 34.32], [-79.75, 34.35], [-79.82, 34.32], [-79.97, 33.97], [-80.5, 33.75], [-81.03, 33.97], [-81.18, 34.32], [-81.53, 34.47], [-81.75, 35.0], [-81.53, 35.53], [-81.0, 35.75], [-80.75, 35.65], [-80.5, 35.75], [-80.25, 35.65], [-80.18, 35.68], [-80.15, 35.75], [-80.25, 36.0], [-80.03, 36.53], [-79.5, 36.75], [-79.0, 36.54], [-78.5, 36.75], [-78.25, 36.65], [-78.18, 36.68], [-78.03, 37.03], [-77.68, 37.18], [-77.53, 37.53], [-77.0, 37.75], [-76.75, 37.65], [-76.5, 37.75], [-75.97, 37.53], [-75.82, 37.18], [-75.75, 37.15], [-75.5, 37.25], [-75.25, 37.15], [-75.0, 37.25], [-74.75, 37.15], [-74.5, 37.25], [-73.97, 37.03], [-73.75, 36.5], [-73.97, 35.97], [-74.32, 35.82], [-74.35, 35.75], [-74.25, 35.5], [-74.47, 34.97], [-75.0, 34.75], [-75.25, 34.85], [-75.32, 34.82], [-75.47, 34.47], [-75.82, 34.32], [-75.97, 33.97], [-76.5, 33.75], [-76.75, 33.85], [-77.0, 33.75], [-77.25, 33.85], [-77.32, 33.82], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.32, 33.32], [-78.47, 32.97], [-78.82, 32.82], [-78.97, 32.47], [-79.32, 32.32], [-79.47, 31.97], [-80.0, 31.75], [-80.25, 31.85], [-80.32, 31.82], [-80.47, 31.47], [-80.82, 31.32], [-80.97, 30.97], [-81.5, 30.75], [-81.75, 30.85], [-81.82, 30.82], [-81.97, 30.47], [-82.5, 30.25], [-82.75, 30.35], [-83.0, 30.25], [-83.25, 30.35], [-83.5, 30.25], [-83.75, 30.35], [-84.0, 30.25], [-84.25, 30.35], [-84.5, 30.25], [-84.75, 30.35], [-85.0, 30.25], [-85.25, 30.35], [-85.5, 30.25], [-85.75, 30.35], [-86.0, 30.25], [-86.53, 30.47]]]]}, "2024-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.53, 30.47], [-86.75, 31.0], [-86.53, 31.53], [-86.0, 31.75], [-85.75, 31.65], [-85.68, 31.68], [-85.53, 32.03], [-85.0, 32.25], [-84.75, 32.15], [-84.5, 32.25], [-84.25, 32.15], [-84.18, 32.18], [-84.03, 32.53], [-83.5, 32.75], [-83.25, 32.65], [-83.0, 32.75], [-82.75, 32.65], [-82.5, 32.75], [-82.25, 32.65], [-82.18, 32.68], [-82.03, 33.03], [-81.5, 33.25], [-82.03, 33.47], [-82.25, 34.0], [-82.03, 34.53], [-81.62, 34.7], [-81.75, 35.0], [-81.53, 35.53], [-81.0, 35.75], [-80.75, 35.65], [-80.5, 35.75], [-80.25, 35.65], [-80.18, 35.68], [-80.15, 35.75], [-80.25, 36.0], [-80.03, 36.53], [-79.5, 36.75], [-79.0, 36.54], [-78.5, 36.75], [-78.25, 36.65], [-78.18, 36.68], [-78.03, 37.03], [-77.68, 37.18], [-77.53, 37.53], [-77.0, 37.75], [-76.75, 37.65], [-76.5, 37.75], [-75.97, 37.53], [-75.82, 37.18], [-75.75, 37.15], [-75.5, 37.25], [-75.25, 37.15], [-75.0, 37.25], [-74.75, 37.15], [-74.5, 37.25], [-73.97, 37.03], [-73.75, 36.5], [-73.97, 35.97], [-74.32, 35.82], [-74.35, 35.75], [-74.25, 35.5], [-74.47, 34.97], [-75.0, 34.75], [-75.25, 34.85], [-75.32, 34.82], [-75.47, 34.47], [-75.82, 34.32], [-75.97, 33.97], [-76.5, 33.75], [-76.75, 33.85], [-77.0, 33.75], [-77.25, 33.85], [-77.32, 33.82], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.32, 33.32], [-78.47, 32.97], [-78.82, 32.82], [-78.97, 32.47], [-79.32, 32.32], [-79.47, 31.97], [-80.0, 31.75], [-80.25, 31.85], [-80.32, 31.82], [-80.47, 31.47], [-80.82, 31.32], [-80.97, 30.97], [-81.5, 30.75], [-81.75, 30.85], [-81.82, 30.82], [-81.97, 30.47], [-82.5, 30.25], [-82.75, 30.35], [-83.0, 30.25], [-83.25, 30.35], [-83.5, 30.25], [-83.75, 30.35], [-84.0, 30.25], [-84.25, 30.35], [-84.5, 30.25], [-84.75, 30.35], [-85.0, 30.25], [-85.25, 30.35], [-85.5, 30.25], [-85.75, 30.35], [-86.0, 30.25], [-86.53, 30.47]], [[-81.25, 33.15], [-81.0, 33.25], [-81.25, 33.35], [-81.5, 33.25], [-81.25, 33.15]], [[-80.75, 33.15], [-80.68, 33.18], [-80.57, 33.43], [-81.0, 33.25], [-80.75, 33.15]], [[-79.54, 34.0], [-79.68, 34.32], [-79.75, 34.35], [-79.82, 34.32], [-79.97, 33.97], [-80.32, 33.82], [-80.43, 33.57], [-80.0, 33.75], [-79.75, 33.65], [-79.68, 33.68], [-79.54, 34.0]]]]}, "2024-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.53, 35.53], [-81.0, 35.75], [-80.75, 35.65], [-80.5, 35.75], [-80.25, 35.65], [-80.18, 35.68], [-80.15, 35.75], [-80.25, 36.0], [-80.03, 36.53], [-79.5, 36.75], [-79.0, 36.54], [-78.5, 36.75], [-78.25, 36.65], [-78.18, 36.68], [-78.03, 37.03], [-77.68, 37.18], [-77.53, 37.53], [-77.0, 37.75], [-76.75, 37.65], [-76.5, 37.75], [-75.97, 37.53], [-75.82, 37.18], [-75.75, 37.15], [-75.5, 37.25], [-75.25, 37.15], [-75.0, 37.25], [-74.75, 37.15], [-74.5, 37.25], [-73.97, 37.03], [-73.75, 36.5], [-73.97, 35.97], [-74.32, 35.82], [-74.35, 35.75], [-74.25, 35.5], [-74.47, 34.97], [-75.0, 34.75], [-75.25, 34.85], [-75.32, 34.82], [-75.47, 34.47], [-75.82, 34.32], [-75.97, 33.97], [-76.5, 33.75], [-76.75, 33.85], [-77.0, 33.75], [-77.25, 33.85], [-77.32, 33.82], [-77.47, 33.47], [-78.0, 33.25], [-78.25, 33.35], [-78.32, 33.32], [-78.47, 32.97], [-78.82, 32.82], [-78.97, 32.47], [-79.5, 32.25], [-79.75, 32.35], [-79.82, 32.32], [-79.97, 31.97], [-80.5, 31.75], [-81.03, 31.97], [-81.25, 32.5], [-81.03, 33.03], [-80.68, 33.18], [-80.57, 33.43], [-81.0, 33.25], [-81.25, 33.35], [-81.5, 33.25], [-82.03, 33.47], [-82.25, 34.0], [-82.03, 34.53], [-81.62, 34.7], [-81.75, 35.0], [-81.53, 35.53]], [[-80.0, 33.75], [-79.75, 33.65], [-79.68, 33.68], [-79.54, 34.0], [-79.68, 34.32], [-79.75, 34.35], [-79.82, 34.32], [-79.97, 33.97], [-80.32, 33.82], [-80.43, 33.57], [-80.0, 33.75]]]]}, "2024-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-81.0, 35.75], [-80.75, 35.65], [-80.5, 35.75], [-79.97, 35.53], [-79.75, 35.0], [-79.85, 34.75], [-79.75, 34.5], [-79.97, 33.97], [-80.32, 33.82], [-80.47, 33.47], [-81.0, 33.25], [-81.25, 33.35], [-81.5, 33.25], [-82.03, 33.47], [-82.25, 34.0], [-82.03, 34.53], [-81.62, 34.7], [-81.75, 35.0], [-81.53, 35.53], [-81.0, 35.75]]], [[[-79.53, 36.03], [-79.0, 36.25], [-78.75, 36.15], [-78.5, 36.25], [-78.25, 36.15], [-78.18, 36.18], [-78.03, 36.53], [-77.5, 36.75], [-77.25, 36.65], [-77.18, 36.68], [-77.03, 37.03], [-76.5, 37.25], [-76.25, 37.15], [-76.0, 37.25], [-75.47, 37.03], [-75.25, 36.5], [-75.46, 36.0], [-75.25, 35.5], [-75.47, 34.97], [-76.0, 34.75], [-76.25, 34.85], [-76.5, 34.75], [-76.75, 34.85], [-76.82, 34.82], [-76.97, 34.47], [-77.32, 34.32], [-77.47, 33.97], [-78.0, 33.75], [-78.25, 33.85], [-78.5, 33.75], [-79.03, 33.97], [-79.18, 34.32], [-79.53, 34.47], [-79.75, 35.0], [-79.65, 35.25], [-79.75, 35.5], [-79.53, 36.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.2782610501465115}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.480382043380192}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.326009368896507, 22.897211964925134, 21.185102395061847, 20.846271576056495, 20.223128066828224, 19.68189242819085]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.21061223347982, 22.215327199300134, 17.952231343587243, 16.892917887369833, 18.264738972981775, 18.97563959757491]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.5182206699737244, -2.896770614142407, -3.4164224926569906, -3.644504543993639, -3.579332966104087, -3.683696796012184]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6779285597795592, -3.405377297730581, -5.254879464508065, -6.2782610501465115, -5.127238899261215, -4.277076820332013]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3610589993311784, -1.7006736110427785, -1.8181839889919698, -1.8869333393100098, -1.7711038835433996, -1.6370199182107976]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4389544090520923, -2.1344227827039304, -2.4737082035797227, -2.7297758621402655, -2.51558550879162, -1.9138831905461968]}}