{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:52:53.713927", "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-Aug-31_to_2024-Sep-05_256.5_29.0"}, "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": 2024080000735}, "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": "August 31 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 05 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": 270248.2618864003}, "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": ["C.North-America", "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": 29.0}, "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": 256.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "256.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 251.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 259.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.5, 30.75], [-102.97, 30.53], [-102.75, 30.0], [-102.97, 29.47], [-103.5, 29.25], [-104.03, 29.47], [-104.25, 30.0], [-104.03, 30.53], [-103.5, 30.75]]]]}, "2024-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.03, 30.53], [-104.5, 30.75], [-104.25, 30.65], [-104.0, 30.75], [-103.75, 30.65], [-103.5, 30.75], [-102.97, 30.53], [-102.82, 30.18], [-102.75, 30.15], [-102.5, 30.25], [-102.25, 30.15], [-102.0, 30.25], [-101.75, 30.15], [-101.5, 30.25], [-100.97, 30.03], [-100.75, 29.5], [-100.97, 28.97], [-101.5, 28.75], [-101.75, 28.85], [-101.82, 28.82], [-101.97, 28.47], [-102.32, 28.32], [-102.47, 27.97], [-103.0, 27.75], [-103.25, 27.85], [-103.5, 27.75], [-104.03, 27.97], [-104.18, 28.32], [-104.53, 28.47], [-104.68, 28.82], [-105.03, 28.97], [-105.25, 29.5], [-105.15, 29.75], [-105.25, 30.0], [-105.03, 30.53]]]]}, "2024-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.53, 32.03], [-108.0, 32.25], [-107.75, 32.15], [-107.5, 32.25], [-107.25, 32.15], [-107.0, 32.25], [-106.75, 32.15], [-106.5, 32.25], [-106.25, 32.15], [-106.0, 32.25], [-105.75, 32.15], [-105.5, 32.25], [-105.25, 32.15], [-105.18, 32.18], [-105.15, 32.25], [-105.25, 32.5], [-105.15, 32.75], [-105.25, 33.0], [-105.03, 33.53], [-104.5, 33.75], [-104.25, 33.65], [-104.0, 33.75], [-103.75, 33.65], [-103.5, 33.75], [-103.25, 33.65], [-103.18, 33.68], [-103.03, 34.03], [-102.5, 34.25], [-102.25, 34.15], [-102.0, 34.25], [-101.75, 34.15], [-101.5, 34.25], [-101.25, 34.15], [-101.0, 34.25], [-100.47, 34.03], [-100.25, 33.5], [-100.35, 33.25], [-100.32, 33.18], [-99.97, 33.03], [-99.75, 32.5], [-99.85, 32.25], [-99.75, 32.0], [-99.97, 31.47], [-100.32, 31.32], [-100.47, 30.97], [-100.82, 30.82], [-100.96, 30.5], [-100.75, 30.0], [-100.85, 29.75], [-100.75, 29.5], [-100.97, 28.97], [-101.5, 28.75], [-101.75, 28.85], [-101.82, 28.82], [-101.97, 28.47], [-102.32, 28.32], [-102.47, 27.97], [-103.0, 27.75], [-103.25, 27.85], [-103.32, 27.82], [-103.47, 27.47], [-104.0, 27.25], [-104.25, 27.35], [-104.5, 27.25], [-105.03, 27.47], [-105.25, 28.0], [-105.15, 28.25], [-105.18, 28.32], [-105.53, 28.47], [-105.7, 28.88], [-106.0, 28.75], [-106.53, 28.97], [-106.68, 29.32], [-106.75, 29.35], [-107.0, 29.25], [-107.53, 29.47], [-107.68, 29.82], [-108.03, 29.97], [-108.18, 30.32], [-108.53, 30.47], [-108.75, 31.0], [-108.65, 31.25], [-108.75, 31.5], [-108.53, 32.03]]]]}, "2024-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.53, 32.03], [-108.0, 32.25], [-107.75, 32.15], [-107.5, 32.25], [-107.25, 32.15], [-107.0, 32.25], [-106.75, 32.15], [-106.5, 32.25], [-106.25, 32.15], [-106.0, 32.25], [-105.75, 32.15], [-105.5, 32.25], [-105.25, 32.15], [-105.18, 32.18], [-105.15, 32.25], [-105.25, 32.5], [-105.15, 32.75], [-105.25, 33.0], [-105.03, 33.53], [-104.5, 33.75], [-104.25, 33.65], [-104.0, 33.75], [-103.75, 33.65], [-103.5, 33.75], [-103.25, 33.65], [-103.18, 33.68], [-103.03, 34.03], [-102.5, 34.25], [-102.25, 34.15], [-102.0, 34.25], [-101.75, 34.15], [-101.5, 34.25], [-101.25, 34.15], [-101.0, 34.25], [-100.47, 34.03], [-100.25, 33.5], [-100.35, 33.25], [-100.32, 33.18], [-99.97, 33.03], [-99.75, 32.5], [-99.85, 32.25], [-99.75, 32.0], [-99.97, 31.47], [-100.32, 31.32], [-100.47, 30.97], [-100.82, 30.82], [-100.96, 30.5], [-100.75, 30.0], [-100.85, 29.75], [-100.75, 29.5], [-100.97, 28.97], [-101.5, 28.75], [-101.75, 28.85], [-101.82, 28.82], [-101.97, 28.47], [-102.32, 28.32], [-102.47, 27.97], [-103.0, 27.75], [-103.25, 27.85], [-103.32, 27.82], [-103.47, 27.47], [-104.0, 27.25], [-104.25, 27.35], [-104.5, 27.25], [-105.03, 27.47], [-105.25, 28.0], [-105.15, 28.25], [-105.18, 28.32], [-105.53, 28.47], [-105.7, 28.88], [-106.0, 28.75], [-106.53, 28.97], [-106.68, 29.32], [-106.75, 29.35], [-107.0, 29.25], [-107.53, 29.47], [-107.68, 29.82], [-108.03, 29.97], [-108.18, 30.32], [-108.53, 30.47], [-108.75, 31.0], [-108.65, 31.25], [-108.75, 31.5], [-108.53, 32.03]]]]}, "2024-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-108.53, 32.03], [-108.0, 32.25], [-107.75, 32.15], [-107.5, 32.25], [-107.25, 32.15], [-107.0, 32.25], [-106.75, 32.15], [-106.5, 32.25], [-106.25, 32.15], [-106.0, 32.25], [-105.75, 32.15], [-105.5, 32.25], [-105.25, 32.15], [-105.18, 32.18], [-105.15, 32.25], [-105.25, 32.5], [-105.15, 32.75], [-105.25, 33.0], [-105.03, 33.53], [-104.5, 33.75], [-104.25, 33.65], [-104.0, 33.75], [-103.75, 33.65], [-103.5, 33.75], [-103.25, 33.65], [-103.18, 33.68], [-103.03, 34.03], [-102.5, 34.25], [-102.25, 34.15], [-102.0, 34.25], [-101.75, 34.15], [-101.5, 34.25], [-101.25, 34.15], [-101.0, 34.25], [-100.47, 34.03], [-100.25, 33.5], [-100.35, 33.25], [-100.32, 33.18], [-99.97, 33.03], [-99.75, 32.5], [-99.85, 32.25], [-99.75, 32.0], [-99.97, 31.47], [-100.32, 31.32], [-100.47, 30.97], [-100.82, 30.82], [-100.96, 30.5], [-100.75, 30.0], [-100.85, 29.75], [-100.75, 29.5], [-100.97, 28.97], [-101.5, 28.75], [-101.75, 28.85], [-102.0, 28.75], [-102.25, 28.85], [-102.32, 28.82], [-102.35, 28.75], [-102.25, 28.5], [-102.47, 27.97], [-103.0, 27.75], [-103.25, 27.85], [-103.32, 27.82], [-103.47, 27.47], [-104.0, 27.25], [-104.25, 27.35], [-104.5, 27.25], [-105.03, 27.47], [-105.25, 28.0], [-105.15, 28.25], [-105.18, 28.32], [-105.53, 28.47], [-105.7, 28.88], [-106.0, 28.75], [-106.53, 28.97], [-106.68, 29.32], [-106.75, 29.35], [-107.0, 29.25], [-107.53, 29.47], [-107.68, 29.82], [-108.03, 29.97], [-108.18, 30.32], [-108.53, 30.47], [-108.75, 31.0], [-108.65, 31.25], [-108.75, 31.5], [-108.53, 32.03]], [[-104.18, 30.18], [-104.15, 30.25], [-104.18, 30.32], [-104.25, 30.35], [-104.32, 30.32], [-104.35, 30.25], [-104.32, 30.18], [-104.25, 30.15], [-104.18, 30.18]]]]}, "2024-09-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-104.03, 28.47], [-104.25, 29.0], [-104.03, 29.53], [-103.5, 29.75], [-103.25, 29.65], [-103.0, 29.75], [-102.47, 29.53], [-102.25, 29.0], [-102.47, 28.47], [-103.0, 28.25], [-103.25, 28.35], [-103.5, 28.25], [-104.03, 28.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.066996551047907}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.66681362537953}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.18456631080403, 22.83169453938808, 21.04061748030915, 20.060390951119246, 21.242011366307963, 24.392162577311183]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.18456631080403, 19.68231608072921, 18.65155944824221, 17.057851409912132, 19.05164744059249, 24.24486440022787]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.216121649796321, -3.458775366658145, -4.646142232519993, -5.437123768705686, -4.132062857696877, -3.2950524094363516]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.216121649796321, -3.9010769425137823, -5.669099115995664, -7.066996551047907, -5.3270911763622735, -3.5217999916086455]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.272603464183534, -1.4626170029258778, -1.8367678374052114, -2.0969858200325375, -1.5802568654168547, -1.3991693320153453]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.272603464183534, -1.6902963032004148, -2.4197215205799396, -2.5934329880080367, -2.037002305562328, -1.4778008840287702]}}