{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:17:48.090816", "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": "2018-Aug-26_to_2018-Sep-03_159.0_53.5"}, "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": 2018080001028}, "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 26 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 03 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 272107.2963334612}, "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": ["Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Far-East"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": ["Bering Sea", "North Pacific Ocean", "Sea of Okhotsk"]}, "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": 53.5}, "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": 159.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "159.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 155.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 164.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[161.25, 60.0], [161.47, 60.53], [162.0, 60.75], [162.53, 60.53], [162.68, 60.18], [163.03, 60.03], [163.25, 59.5], [163.03, 58.97], [162.5, 58.75], [161.97, 58.97], [161.82, 59.32], [161.47, 59.47], [161.25, 60.0]]]]}, "2018-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[155.25, 56.0], [155.35, 56.25], [155.25, 56.5], [155.47, 57.03], [155.82, 57.18], [155.97, 57.53], [156.32, 57.68], [156.47, 58.03], [157.0, 58.25], [157.25, 58.15], [157.5, 58.25], [157.75, 58.15], [157.82, 58.18], [157.97, 58.53], [158.5, 58.75], [158.75, 58.65], [158.82, 58.68], [158.97, 59.03], [159.32, 59.18], [159.47, 59.53], [159.82, 59.68], [159.97, 60.03], [160.5, 60.25], [160.75, 60.15], [160.82, 60.18], [160.97, 60.53], [161.5, 60.75], [161.75, 60.65], [162.0, 60.75], [162.25, 60.65], [162.32, 60.68], [162.47, 61.03], [163.0, 61.25], [163.25, 61.15], [163.5, 61.25], [163.75, 61.15], [164.0, 61.25], [164.25, 61.15], [164.5, 61.25], [165.03, 61.03], [165.25, 60.5], [165.15, 60.25], [165.25, 60.0], [165.04, 59.5], [165.25, 59.0], [165.03, 58.47], [164.5, 58.25], [164.25, 58.35], [164.0, 58.25], [163.57, 58.43], [163.75, 58.0], [163.53, 57.47], [163.18, 57.32], [163.15, 57.25], [163.18, 57.18], [163.53, 57.03], [163.75, 56.5], [163.53, 55.97], [163.0, 55.75], [162.7, 55.88], [162.54, 55.5], [162.75, 55.0], [162.53, 54.47], [162.0, 54.25], [161.75, 54.35], [161.5, 54.25], [161.25, 54.35], [161.0, 54.25], [160.47, 54.47], [160.25, 55.0], [160.35, 55.25], [160.32, 55.32], [159.97, 55.47], [159.82, 55.82], [159.75, 55.85], [159.68, 55.82], [159.53, 55.47], [159.18, 55.32], [159.03, 54.97], [158.5, 54.75], [157.97, 54.97], [157.82, 55.32], [157.75, 55.35], [157.68, 55.32], [157.53, 54.97], [157.0, 54.75], [156.75, 54.85], [156.5, 54.75], [156.25, 54.85], [156.18, 54.82], [156.03, 54.47], [155.5, 54.25], [154.97, 54.47], [154.75, 55.0], [154.97, 55.53], [155.32, 55.68], [155.35, 55.75], [155.25, 56.0]]]]}, "2018-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[154.75, 55.0], [154.97, 55.53], [155.32, 55.68], [155.35, 55.75], [155.25, 56.0], [155.35, 56.25], [155.25, 56.5], [155.47, 57.03], [155.82, 57.18], [155.97, 57.53], [156.32, 57.68], [156.47, 58.03], [157.0, 58.25], [157.25, 58.15], [157.5, 58.25], [157.75, 58.15], [157.82, 58.18], [157.97, 58.53], [158.5, 58.75], [158.75, 58.65], [158.82, 58.68], [158.97, 59.03], [159.32, 59.18], [159.47, 59.53], [159.82, 59.68], [159.97, 60.03], [160.5, 60.25], [160.75, 60.15], [160.82, 60.18], [160.97, 60.53], [161.5, 60.75], [161.75, 60.65], [162.0, 60.75], [162.25, 60.65], [162.32, 60.68], [162.47, 61.03], [163.0, 61.25], [163.25, 61.15], [163.5, 61.25], [163.75, 61.15], [164.0, 61.25], [164.25, 61.15], [164.5, 61.25], [165.03, 61.03], [165.25, 60.5], [165.15, 60.25], [165.25, 60.0], [165.04, 59.5], [165.25, 59.0], [165.03, 58.47], [164.5, 58.25], [164.25, 58.35], [164.0, 58.25], [163.57, 58.43], [163.75, 58.0], [163.53, 57.47], [163.18, 57.32], [163.15, 57.25], [163.18, 57.18], [163.53, 57.03], [163.75, 56.5], [163.53, 55.97], [163.0, 55.75], [162.7, 55.88], [162.54, 55.5], [162.75, 55.0], [162.53, 54.47], [162.0, 54.25], [161.75, 54.35], [161.5, 54.25], [161.25, 54.35], [161.18, 54.32], [161.03, 53.97], [160.5, 53.75], [160.25, 53.85], [160.18, 53.82], [160.15, 53.75], [160.25, 53.5], [160.03, 52.97], [159.5, 52.75], [159.25, 52.85], [159.18, 52.82], [159.03, 52.47], [158.68, 52.32], [158.53, 51.97], [158.0, 51.75], [157.57, 51.93], [157.75, 51.5], [157.53, 50.97], [157.0, 50.75], [156.47, 50.97], [156.25, 51.5], [156.47, 52.03], [157.0, 52.25], [156.47, 52.47], [156.32, 52.82], [156.25, 52.85], [156.0, 52.75], [155.47, 52.97], [155.25, 53.5], [155.35, 53.75], [155.25, 54.0], [155.35, 54.25], [155.32, 54.32], [154.97, 54.47], [154.75, 55.0]], [[157.43, 52.07], [157.32, 52.32], [157.25, 52.35], [157.0, 52.25], [157.43, 52.07]]]]}, "2018-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[154.75, 55.0], [154.97, 55.53], [155.32, 55.68], [155.35, 55.75], [155.25, 56.0], [155.35, 56.25], [155.25, 56.5], [155.47, 57.03], [155.82, 57.18], [155.97, 57.53], [156.32, 57.68], [156.47, 58.03], [157.0, 58.25], [157.25, 58.15], [157.5, 58.25], [157.75, 58.15], [157.82, 58.18], [157.97, 58.53], [158.5, 58.75], [158.75, 58.65], [158.82, 58.68], [158.97, 59.03], [159.32, 59.18], [159.47, 59.53], [159.82, 59.68], [159.97, 60.03], [160.5, 60.25], [160.75, 60.15], [160.82, 60.18], [160.97, 60.53], [161.5, 60.75], [161.75, 60.65], [162.0, 60.75], [162.25, 60.65], [162.32, 60.68], [162.47, 61.03], [163.0, 61.25], [163.25, 61.15], [163.5, 61.25], [163.75, 61.15], [164.0, 61.25], [164.25, 61.15], [164.5, 61.25], [165.03, 61.03], [165.25, 60.5], [165.15, 60.25], [165.25, 60.0], [165.04, 59.5], [165.25, 59.0], [165.03, 58.47], [164.5, 58.25], [164.25, 58.35], [164.0, 58.25], [163.57, 58.43], [163.75, 58.0], [163.53, 57.47], [163.18, 57.32], [163.15, 57.25], [163.18, 57.18], [163.53, 57.03], [163.75, 56.5], [163.53, 55.97], [163.0, 55.75], [162.7, 55.88], [162.54, 55.5], [162.75, 55.0], [162.53, 54.47], [162.0, 54.25], [161.75, 54.35], [161.5, 54.25], [161.25, 54.35], [161.18, 54.32], [161.03, 53.97], [160.5, 53.75], [160.25, 53.85], [160.18, 53.82], [160.15, 53.75], [160.25, 53.5], [160.03, 52.97], [159.5, 52.75], [159.25, 52.85], [159.18, 52.82], [159.03, 52.47], [158.68, 52.32], [158.65, 52.25], [158.75, 52.0], [158.53, 51.47], [158.0, 51.25], [157.75, 51.35], [157.68, 51.32], [157.53, 50.97], [157.0, 50.75], [156.47, 50.97], [156.25, 51.5], [156.35, 51.75], [156.32, 51.82], [155.97, 51.97], [155.82, 52.32], [155.47, 52.47], [155.25, 53.0], [155.35, 53.25], [155.25, 53.5], [155.35, 53.75], [155.25, 54.0], [155.35, 54.25], [155.32, 54.32], [154.97, 54.47], [154.75, 55.0]]]]}, "2018-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[154.75, 55.0], [154.97, 55.53], [155.32, 55.68], [155.35, 55.75], [155.25, 56.0], [155.35, 56.25], [155.25, 56.5], [155.47, 57.03], [155.82, 57.18], [155.97, 57.53], [156.32, 57.68], [156.47, 58.03], [157.0, 58.25], [157.25, 58.15], [157.5, 58.25], [157.75, 58.15], [157.82, 58.18], [157.97, 58.53], [158.5, 58.75], [158.75, 58.65], [158.82, 58.68], [158.97, 59.03], [159.32, 59.18], [159.47, 59.53], [159.82, 59.68], [159.97, 60.03], [160.5, 60.25], [160.75, 60.15], [160.82, 60.18], [160.97, 60.53], [161.5, 60.75], [161.75, 60.65], [162.0, 60.75], [162.25, 60.65], [162.32, 60.68], [162.47, 61.03], [163.0, 61.25], [163.53, 61.03], [163.68, 60.68], [164.03, 60.53], [164.25, 60.0], [164.03, 59.47], [163.68, 59.32], [163.53, 58.97], [163.18, 58.82], [163.03, 58.47], [162.68, 58.32], [162.63, 58.2], [163.03, 58.03], [163.25, 57.5], [163.03, 56.97], [162.63, 56.8], [162.75, 56.5], [162.53, 55.97], [162.18, 55.82], [162.04, 55.5], [162.25, 55.0], [162.03, 54.47], [161.5, 54.25], [161.25, 54.35], [161.18, 54.32], [161.03, 53.97], [160.5, 53.75], [160.25, 53.85], [160.18, 53.82], [160.15, 53.75], [160.25, 53.5], [160.03, 52.97], [159.5, 52.75], [159.25, 52.85], [159.18, 52.82], [159.03, 52.47], [158.68, 52.32], [158.65, 52.25], [158.75, 52.0], [158.53, 51.47], [158.0, 51.25], [157.75, 51.35], [157.68, 51.32], [157.53, 50.97], [157.0, 50.75], [156.47, 50.97], [156.25, 51.5], [156.35, 51.75], [156.32, 51.82], [155.97, 51.97], [155.82, 52.32], [155.47, 52.47], [155.25, 53.0], [155.35, 53.25], [155.25, 53.5], [155.35, 53.75], [155.25, 54.0], [155.35, 54.25], [155.32, 54.32], [154.97, 54.47], [154.75, 55.0]]]]}, "2018-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[155.25, 54.0], [155.35, 54.25], [155.25, 54.5], [155.47, 55.03], [156.0, 55.25], [156.25, 55.15], [156.5, 55.25], [157.03, 55.03], [157.25, 54.5], [157.15, 54.25], [157.2, 54.13], [157.5, 54.25], [157.75, 54.15], [158.0, 54.25], [158.25, 54.15], [158.5, 54.25], [158.75, 54.15], [158.82, 54.18], [158.97, 54.53], [159.32, 54.68], [159.47, 55.03], [160.0, 55.25], [160.53, 55.03], [160.75, 54.5], [160.53, 53.97], [160.18, 53.82], [160.15, 53.75], [160.25, 53.5], [160.03, 52.97], [159.5, 52.75], [159.25, 52.85], [159.18, 52.82], [159.03, 52.47], [158.68, 52.32], [158.65, 52.25], [158.75, 52.0], [158.53, 51.47], [158.0, 51.25], [157.75, 51.35], [157.68, 51.32], [157.53, 50.97], [157.0, 50.75], [156.47, 50.97], [156.25, 51.5], [156.35, 51.75], [156.32, 51.82], [155.97, 51.97], [155.82, 52.32], [155.47, 52.47], [155.25, 53.0], [155.35, 53.25], [155.25, 53.5], [155.35, 53.75], [155.25, 54.0]]], [[[156.47, 58.03], [157.0, 58.25], [157.25, 58.15], [157.5, 58.25], [158.03, 58.03], [158.25, 57.5], [158.03, 56.97], [157.68, 56.82], [157.65, 56.75], [157.75, 56.5], [157.53, 55.97], [157.0, 55.75], [156.75, 55.85], [156.5, 55.75], [156.25, 55.85], [156.0, 55.75], [155.47, 55.97], [155.25, 56.5], [155.47, 57.03], [155.82, 57.18], [155.97, 57.53], [156.32, 57.68], [156.47, 58.03]]]]}, "2018-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[156.75, 53.5], [156.97, 54.03], [157.5, 54.25], [157.75, 54.15], [158.0, 54.25], [158.25, 54.15], [158.5, 54.25], [158.75, 54.15], [159.0, 54.25], [159.25, 54.15], [159.38, 54.2], [159.25, 54.5], [159.47, 55.03], [160.0, 55.25], [160.53, 55.03], [160.75, 54.5], [160.53, 53.97], [160.13, 53.8], [160.25, 53.5], [160.03, 52.97], [159.5, 52.75], [159.25, 52.85], [159.18, 52.82], [159.03, 52.47], [158.68, 52.32], [158.65, 52.25], [158.75, 52.0], [158.53, 51.47], [158.0, 51.25], [157.47, 51.47], [157.25, 52.0], [157.35, 52.25], [157.25, 52.5], [157.35, 52.75], [157.32, 52.82], [156.97, 52.97], [156.75, 53.5]]]]}, "2018-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[156.75, 53.5], [156.97, 54.03], [157.5, 54.25], [157.75, 54.15], [158.0, 54.25], [158.25, 54.15], [158.5, 54.25], [158.75, 54.15], [159.0, 54.25], [159.25, 54.15], [159.38, 54.2], [159.25, 54.5], [159.47, 55.03], [160.0, 55.25], [160.53, 55.03], [160.75, 54.5], [160.53, 53.97], [160.13, 53.8], [160.25, 53.5], [160.03, 52.97], [159.5, 52.75], [159.25, 52.85], [159.0, 52.75], [158.75, 52.85], [158.68, 52.82], [158.53, 52.47], [158.0, 52.25], [157.47, 52.47], [157.32, 52.82], [156.97, 52.97], [156.75, 53.5]]]]}, "2018-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[158.5, 54.25], [158.75, 54.15], [159.0, 54.25], [159.25, 54.15], [159.5, 54.25], [160.03, 54.03], [160.25, 53.5], [160.03, 52.97], [159.5, 52.75], [159.25, 52.85], [159.0, 52.75], [158.75, 52.85], [158.68, 52.82], [158.53, 52.47], [158.0, 52.25], [157.47, 52.47], [157.25, 53.0], [157.47, 53.53], [157.82, 53.68], [157.97, 54.03], [158.5, 54.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.1235221058414595}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.0368785781788326}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.122883981118775, 7.194751707701869, 6.446799452781818, 6.370167788349875, 6.8154240837985185, 8.748686421782224, 8.08506285678709, 7.0694209407139965, 8.03422866193955]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.954006282279124, 3.0136646823303863, 1.796734800500758, 0.4171390037514584, 2.3875168631898873, 6.398341504684652, 6.834245856744872, 5.958252533338339, 7.117085777060254]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9715023593305716, -3.7096200884535526, -4.434789970702107, -4.484937791386429, -3.8433712528188066, -2.7130764025468643, -2.6017603955635424, -3.2282209634091634, -2.5463452209379227]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.064136360527584, -5.405212891613246, -6.015345985534168, -7.1235221058414595, -5.5870218301367345, -3.4711824122644543, -2.8454102204442506, -3.8235030165294575, -2.8065944283981707]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3525766662088532, -1.7277754892120654, -2.0674272719932, -2.141343675027396, -1.8041135033471574, -1.51421237628863, -1.392239663386353, -1.7238220722629756, -1.4014399095795476]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3537151066985047, -2.285255546493317, -2.677099025861115, -2.8619737561025116, -2.611830834252199, -2.2184271936138384, -1.5902266303238803, -1.9688353615862573, -1.45718763609111]}}