{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:38.928325", "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": "2017-Aug-05_to_2017-Aug-12_254.5_40.5"}, "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": 2017080000207}, "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 05 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 12 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 170055.10508616388}, "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": ["C.North-America", "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": []}, "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": 40.5}, "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": 254.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "254.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 252.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 257.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.75, 44.5], [-107.53, 45.03], [-107.0, 45.25], [-106.75, 45.15], [-106.5, 45.25], [-105.97, 45.03], [-105.75, 44.5], [-105.85, 44.25], [-105.75, 44.0], [-105.97, 43.47], [-106.5, 43.25], [-107.03, 43.47], [-107.18, 43.82], [-107.53, 43.97], [-107.75, 44.5]]]]}, "2017-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.68, 43.18], [-106.65, 43.25], [-106.68, 43.32], [-107.03, 43.47], [-107.18, 43.82], [-107.53, 43.97], [-107.75, 44.5], [-107.53, 45.03], [-107.0, 45.25], [-106.75, 45.15], [-106.5, 45.25], [-105.97, 45.03], [-105.75, 44.5], [-105.85, 44.25], [-105.82, 44.18], [-105.75, 44.15], [-105.5, 44.25], [-105.25, 44.15], [-105.0, 44.25], [-104.75, 44.15], [-104.68, 44.18], [-104.53, 44.53], [-104.0, 44.75], [-103.47, 44.53], [-103.32, 44.18], [-102.97, 44.03], [-102.75, 43.5], [-102.97, 42.97], [-103.5, 42.75], [-103.25, 42.65], [-103.0, 42.75], [-102.47, 42.53], [-102.25, 42.0], [-102.47, 41.47], [-102.82, 41.32], [-102.97, 40.97], [-103.32, 40.82], [-103.35, 40.75], [-103.25, 40.5], [-103.37, 40.2], [-102.97, 40.03], [-102.75, 39.5], [-102.97, 38.97], [-103.32, 38.82], [-103.47, 38.47], [-104.0, 38.25], [-104.25, 38.35], [-104.32, 38.32], [-104.35, 38.25], [-104.25, 38.0], [-104.47, 37.47], [-105.0, 37.25], [-105.53, 37.47], [-105.75, 38.0], [-105.65, 38.25], [-105.75, 38.5], [-105.65, 38.75], [-105.68, 38.82], [-105.75, 38.85], [-106.0, 38.75], [-106.53, 38.97], [-106.75, 39.5], [-106.53, 40.03], [-106.18, 40.18], [-106.15, 40.25], [-106.18, 40.32], [-106.53, 40.47], [-106.75, 41.0], [-106.65, 41.25], [-106.68, 41.32], [-106.75, 41.35], [-107.0, 41.25], [-107.53, 41.47], [-107.75, 42.0], [-107.53, 42.53], [-107.18, 42.68], [-107.03, 43.03], [-106.68, 43.18]], [[-103.75, 42.85], [-103.82, 42.82], [-103.85, 42.75], [-103.8, 42.63], [-103.5, 42.75], [-103.75, 42.85]]]]}, "2017-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-106.68, 43.18], [-106.65, 43.25], [-106.68, 43.32], [-107.03, 43.47], [-107.18, 43.82], [-107.53, 43.97], [-107.75, 44.5], [-107.53, 45.03], [-107.0, 45.25], [-106.75, 45.15], [-106.5, 45.25], [-105.97, 45.03], [-105.75, 44.5], [-105.85, 44.25], [-105.82, 44.18], [-105.75, 44.15], [-105.5, 44.25], [-105.25, 44.15], [-105.0, 44.25], [-104.75, 44.15], [-104.68, 44.18], [-104.53, 44.53], [-104.0, 44.75], [-103.47, 44.53], [-103.32, 44.18], [-102.97, 44.03], [-102.75, 43.5], [-102.97, 42.97], [-103.5, 42.75], [-103.25, 42.65], [-103.0, 42.75], [-102.47, 42.53], [-102.25, 42.0], [-102.47, 41.47], [-102.82, 41.32], [-102.97, 40.97], [-103.32, 40.82], [-103.35, 40.75], [-103.25, 40.5], [-103.37, 40.2], [-102.97, 40.03], [-102.75, 39.5], [-102.85, 39.25], [-102.75, 39.0], [-102.85, 38.75], [-102.75, 38.5], [-102.85, 38.25], [-102.75, 38.0], [-102.97, 37.47], [-103.32, 37.32], [-103.47, 36.97], [-104.0, 36.75], [-104.25, 36.85], [-104.5, 36.75], [-105.03, 36.97], [-105.18, 37.32], [-105.53, 37.47], [-105.75, 38.0], [-105.65, 38.25], [-105.75, 38.5], [-105.65, 38.75], [-105.68, 38.82], [-105.75, 38.85], [-106.0, 38.75], [-106.53, 38.97], [-106.75, 39.5], [-106.53, 40.03], [-106.18, 40.18], [-106.15, 40.25], [-106.18, 40.32], [-106.53, 40.47], [-106.75, 41.0], [-106.65, 41.25], [-106.68, 41.32], [-106.75, 41.35], [-107.0, 41.25], [-107.53, 41.47], [-107.75, 42.0], [-107.53, 42.53], [-107.18, 42.68], [-107.03, 43.03], [-106.68, 43.18]], [[-103.75, 42.85], [-103.82, 42.82], [-103.85, 42.75], [-103.8, 42.63], [-103.5, 42.75], [-103.75, 42.85]]]]}, "2017-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.54, 41.5], [-107.75, 42.0], [-107.53, 42.53], [-107.18, 42.68], [-107.03, 43.03], [-106.68, 43.18], [-106.65, 43.25], [-106.75, 43.5], [-106.53, 44.03], [-106.0, 44.25], [-105.75, 44.15], [-105.5, 44.25], [-105.25, 44.15], [-105.0, 44.25], [-104.75, 44.15], [-104.68, 44.18], [-104.53, 44.53], [-104.0, 44.75], [-103.47, 44.53], [-103.32, 44.18], [-102.97, 44.03], [-102.75, 43.5], [-102.97, 42.97], [-103.5, 42.75], [-103.25, 42.65], [-103.0, 42.75], [-102.47, 42.53], [-102.25, 42.0], [-102.47, 41.47], [-102.82, 41.32], [-102.97, 40.97], [-103.32, 40.82], [-103.35, 40.75], [-103.25, 40.5], [-103.37, 40.2], [-102.97, 40.03], [-102.75, 39.5], [-102.85, 39.25], [-102.75, 39.0], [-102.85, 38.75], [-102.75, 38.5], [-102.85, 38.25], [-102.75, 38.0], [-102.97, 37.47], [-103.32, 37.32], [-103.47, 36.97], [-104.0, 36.75], [-104.25, 36.85], [-104.5, 36.75], [-105.03, 36.97], [-105.18, 37.32], [-105.53, 37.47], [-105.75, 38.0], [-105.65, 38.25], [-105.75, 38.5], [-105.65, 38.75], [-105.68, 38.82], [-105.75, 38.85], [-106.0, 38.75], [-106.53, 38.97], [-106.68, 39.32], [-106.75, 39.35], [-107.0, 39.25], [-107.53, 39.47], [-107.75, 40.0], [-107.54, 40.5], [-107.75, 41.0], [-107.54, 41.5]], [[-103.75, 42.85], [-103.82, 42.82], [-103.85, 42.75], [-103.8, 42.63], [-103.5, 42.75], [-103.75, 42.85]]]]}, "2017-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.65, 41.75], [-107.75, 42.0], [-107.65, 42.25], [-107.75, 42.5], [-107.53, 43.03], [-107.0, 43.25], [-106.75, 43.15], [-106.5, 43.25], [-106.25, 43.15], [-106.0, 43.25], [-105.75, 43.15], [-105.68, 43.18], [-105.53, 43.53], [-105.0, 43.75], [-104.47, 43.53], [-104.25, 43.0], [-104.46, 42.5], [-104.25, 42.0], [-104.35, 41.75], [-104.25, 41.5], [-104.47, 40.97], [-104.82, 40.82], [-104.85, 40.75], [-104.82, 40.68], [-104.47, 40.53], [-104.32, 40.18], [-103.97, 40.03], [-103.82, 39.68], [-103.75, 39.65], [-103.5, 39.75], [-102.97, 39.53], [-102.75, 39.0], [-102.85, 38.75], [-102.75, 38.5], [-102.85, 38.25], [-102.75, 38.0], [-102.97, 37.47], [-103.32, 37.32], [-103.47, 36.97], [-104.0, 36.75], [-104.25, 36.85], [-104.5, 36.75], [-105.03, 36.97], [-105.18, 37.32], [-105.53, 37.47], [-105.75, 38.0], [-105.65, 38.25], [-105.75, 38.5], [-105.65, 38.75], [-105.68, 38.82], [-106.03, 38.97], [-106.18, 39.32], [-106.25, 39.35], [-106.5, 39.25], [-106.75, 39.35], [-107.0, 39.25], [-107.53, 39.47], [-107.75, 40.0], [-107.54, 40.5], [-107.75, 41.0], [-107.65, 41.25], [-107.75, 41.5], [-107.65, 41.75]]]]}, "2017-08-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.65, 41.75], [-107.75, 42.0], [-107.65, 42.25], [-107.75, 42.5], [-107.53, 43.03], [-107.0, 43.25], [-106.75, 43.15], [-106.5, 43.25], [-106.25, 43.15], [-106.0, 43.25], [-105.75, 43.15], [-105.68, 43.18], [-105.53, 43.53], [-105.0, 43.75], [-104.47, 43.53], [-104.25, 43.0], [-104.35, 42.75], [-104.25, 42.5], [-104.35, 42.25], [-104.25, 42.0], [-104.35, 41.75], [-104.25, 41.5], [-104.47, 40.97], [-104.82, 40.82], [-104.85, 40.75], [-104.82, 40.68], [-104.47, 40.53], [-104.32, 40.18], [-103.97, 40.03], [-103.75, 39.5], [-103.97, 38.97], [-104.5, 38.75], [-104.75, 38.85], [-105.0, 38.75], [-105.53, 38.97], [-105.68, 39.32], [-105.75, 39.35], [-106.0, 39.25], [-106.25, 39.35], [-106.5, 39.25], [-106.75, 39.35], [-107.0, 39.25], [-107.53, 39.47], [-107.75, 40.0], [-107.54, 40.5], [-107.75, 41.0], [-107.65, 41.25], [-107.75, 41.5], [-107.65, 41.75]]]]}, "2017-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.65, 42.25], [-107.75, 42.5], [-107.53, 43.03], [-107.0, 43.25], [-106.75, 43.15], [-106.5, 43.25], [-106.25, 43.15], [-106.0, 43.25], [-105.75, 43.15], [-105.68, 43.18], [-105.53, 43.53], [-105.0, 43.75], [-104.47, 43.53], [-104.25, 43.0], [-104.35, 42.75], [-104.25, 42.5], [-104.35, 42.25], [-104.25, 42.0], [-104.35, 41.75], [-104.25, 41.5], [-104.47, 40.97], [-104.82, 40.82], [-104.85, 40.75], [-104.82, 40.68], [-104.47, 40.53], [-104.32, 40.18], [-103.97, 40.03], [-103.75, 39.5], [-103.97, 38.97], [-104.5, 38.75], [-104.75, 38.85], [-105.0, 38.75], [-105.53, 38.97], [-105.68, 39.32], [-106.03, 39.47], [-106.25, 40.0], [-106.15, 40.25], [-106.18, 40.32], [-106.25, 40.35], [-106.5, 40.25], [-107.03, 40.47], [-107.18, 40.82], [-107.53, 40.97], [-107.75, 41.5], [-107.65, 41.75], [-107.75, 42.0], [-107.65, 42.25]]]]}, "2017-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-105.0, 43.25], [-104.47, 43.03], [-104.25, 42.5], [-104.47, 41.97], [-105.0, 41.75], [-105.53, 41.97], [-105.75, 42.5], [-105.53, 43.03], [-105.0, 43.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.792060615433456}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.600012279618251}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.271395047250564, 15.643901535206851, 15.45159336947529, 15.640660840088572, 15.304231994154236, 13.290330372993083, 14.513786091121347, 17.81250253780729]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.925139281569102, 7.666344104190728, 7.480956864605503, 7.408505746465551, 9.529708975768301, 9.228464852976174, 10.459565935456055, 17.81250253780729]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.063702226407959, -4.64579561815146, -5.29259553878283, -4.428588101616672, -3.8969609461367867, -4.726802904665906, -4.385171963284468, -4.047448448961518]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.07157687157445, -6.462112993631365, -6.792060615433456, -6.187520765279373, -5.256001376028564, -6.505402677222435, -6.175052546525649, -4.047448448961518]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.509449383003126, -1.8148254010906644, -2.0201703828398245, -1.7733584391974122, -1.611974668409606, -1.899113998649831, -1.6981072828173402, -1.3044371299299449]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6406447495294258, -2.401429720053681, -2.4152284718630446, -2.298093526116816, -2.0199629748507193, -2.36302126783286, -2.069850312416137, -1.3044371299299449]}}