{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:24.079175", "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": "2013-Sep-19_to_2013-Sep-24_208.0_58.5"}, "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": 2013090000936}, "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 19 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 24 2013"}, "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": 63897.95326623568}, "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": ["N.Pacific-Ocean", "N.W.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": ["Gulf of Alaska"]}, "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": 58.5}, "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": 208.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "208.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 204.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 210.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 56.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-152.53, 57.97], [-152.75, 58.5], [-152.53, 59.03], [-152.0, 59.25], [-151.75, 59.15], [-151.5, 59.25], [-150.97, 59.03], [-150.75, 58.5], [-150.97, 57.97], [-151.5, 57.75], [-151.75, 57.85], [-152.0, 57.75], [-152.53, 57.97]]]]}, "2013-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-153.25, 60.0], [-153.03, 60.53], [-152.5, 60.75], [-152.25, 60.65], [-152.0, 60.75], [-151.47, 60.53], [-151.25, 60.0], [-151.35, 59.75], [-151.25, 59.5], [-151.37, 59.2], [-150.97, 59.03], [-150.75, 58.5], [-150.97, 57.97], [-151.5, 57.75], [-151.75, 57.85], [-152.0, 57.75], [-152.25, 57.85], [-152.5, 57.75], [-153.03, 57.97], [-153.25, 58.5], [-153.03, 59.03], [-152.62, 59.2], [-152.68, 59.32], [-153.03, 59.47], [-153.25, 60.0]]]]}, "2013-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-154.53, 57.47], [-154.75, 58.0], [-154.53, 58.53], [-154.0, 58.75], [-153.47, 58.53], [-153.25, 58.0], [-153.47, 57.47], [-154.0, 57.25], [-154.53, 57.47]]], [[[-153.03, 60.53], [-152.5, 60.75], [-152.25, 60.65], [-152.0, 60.75], [-151.47, 60.53], [-151.25, 60.0], [-151.35, 59.75], [-151.25, 59.5], [-151.37, 59.2], [-150.97, 59.03], [-150.75, 58.5], [-150.97, 57.97], [-151.5, 57.75], [-151.75, 57.85], [-152.0, 57.75], [-152.25, 57.85], [-152.5, 57.75], [-153.03, 57.97], [-153.25, 58.5], [-153.03, 59.03], [-152.62, 59.2], [-152.68, 59.32], [-153.03, 59.47], [-153.25, 60.0], [-153.03, 60.53]]]]}, "2013-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-154.5, 58.75], [-154.25, 58.65], [-154.18, 58.68], [-154.04, 59.0], [-154.25, 59.5], [-154.03, 60.03], [-153.5, 60.25], [-153.2, 60.13], [-153.03, 60.53], [-152.5, 60.75], [-152.25, 60.65], [-152.0, 60.75], [-151.47, 60.53], [-151.25, 60.0], [-151.35, 59.75], [-151.25, 59.5], [-151.35, 59.25], [-151.32, 59.18], [-151.25, 59.15], [-151.0, 59.25], [-150.75, 59.15], [-150.5, 59.25], [-149.97, 59.03], [-149.82, 58.68], [-149.47, 58.53], [-149.25, 58.0], [-149.35, 57.75], [-149.25, 57.5], [-149.35, 57.25], [-149.32, 57.18], [-148.97, 57.03], [-148.75, 56.5], [-148.97, 55.97], [-149.5, 55.75], [-150.03, 55.97], [-150.18, 56.32], [-150.25, 56.35], [-150.5, 56.25], [-150.75, 56.35], [-151.0, 56.25], [-151.25, 56.35], [-151.5, 56.25], [-151.75, 56.35], [-151.82, 56.32], [-151.97, 55.97], [-152.5, 55.75], [-153.03, 55.97], [-153.18, 56.32], [-153.25, 56.35], [-153.5, 56.25], [-154.03, 56.47], [-154.25, 57.0], [-154.12, 57.3], [-154.25, 57.35], [-154.32, 57.32], [-154.47, 56.97], [-155.0, 56.75], [-155.53, 56.97], [-155.75, 57.5], [-155.53, 58.03], [-155.18, 58.18], [-155.03, 58.53], [-154.5, 58.75]]]]}, "2013-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-154.5, 58.75], [-154.25, 58.65], [-154.18, 58.68], [-154.04, 59.0], [-154.25, 59.5], [-154.03, 60.03], [-153.5, 60.25], [-153.2, 60.13], [-153.03, 60.53], [-152.5, 60.75], [-152.25, 60.65], [-152.0, 60.75], [-151.47, 60.53], [-151.25, 60.0], [-151.35, 59.75], [-151.25, 59.5], [-151.35, 59.25], [-151.32, 59.18], [-151.25, 59.15], [-151.0, 59.25], 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over entire duration", "value": -3.979544850091486}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.770829843138205}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.7257401060503526, 6.793584991619923, 7.132716134807936, 6.672150650446838, 6.375620305061034, 6.980876737419749]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.4055433810374325, 6.1877114711392665, 6.445382267269736, 4.851926717235813, 4.873223758514541, 5.4860792760445065]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0672351607174164, -2.722387012876633, -2.312324588852456, -2.914771804504203, -3.0950712241834433, -2.399947420148567]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.135820317204832, -3.197407564978903, -2.6102315892465526, -3.979544850091486, -3.753743168220751, -2.991288371242092]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6051035568638574, -1.8196044476875717, -1.4958817391060326, -1.9879509429429787, -2.0783248498888898, -1.622174908323789]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6281467661926692, -2.2700765275161796, -1.5925770881941084, -2.433630396769804, -2.4845063681822293, -2.013097047605357]}}