{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:55.324386", "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-Nov-28_to_2013-Nov-30_138.5_34.5"}, "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": 2013110001248}, "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": "November 28 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 30 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 59369.5622071028}, "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": ["Japan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "N.Pacific-Ocean"]}, "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": ["North Pacific Ocean", "Philippine Sea"]}, "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": 34.5}, "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": 138.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "138.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 136.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 140.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.5, 34.25], [137.75, 34.15], [137.88, 34.2], [137.82, 34.32], [137.47, 34.47], [137.25, 35.0], [137.47, 35.53], [138.0, 35.75], [138.25, 35.65], [138.5, 35.75], [139.03, 35.53], [139.25, 35.0], [139.15, 34.75], [139.18, 34.68], [139.25, 34.65], [139.5, 34.75], [140.03, 34.53], [140.18, 34.18], [140.53, 34.03], [140.68, 33.68], [141.03, 33.53], [141.25, 33.0], [141.03, 32.47], [140.5, 32.25], [140.25, 32.35], [140.18, 32.32], [140.03, 31.97], [139.5, 31.75], [139.25, 31.85], [139.0, 31.75], [138.75, 31.85], [138.5, 31.75], [138.25, 31.85], [138.0, 31.75], [137.47, 31.97], [137.32, 32.32], [137.25, 32.35], [137.0, 32.25], [136.47, 32.47], [136.25, 33.0], [136.47, 33.53], [136.82, 33.68], [136.97, 34.03], [137.5, 34.25]]]]}, "2013-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.5, 34.25], [137.75, 34.15], [137.88, 34.2], [137.82, 34.32], [137.47, 34.47], [137.25, 35.0], [137.47, 35.53], [138.0, 35.75], [138.25, 35.65], [138.5, 35.75], [139.03, 35.53], [139.25, 35.0], [139.15, 34.75], [139.18, 34.68], [139.25, 34.65], [139.5, 34.75], [140.03, 34.53], [140.18, 34.18], [140.53, 34.03], [140.68, 33.68], [141.03, 33.53], [141.25, 33.0], [141.03, 32.47], [140.5, 32.25], [140.25, 32.35], [140.18, 32.32], [140.03, 31.97], [139.5, 31.75], [139.25, 31.85], [139.0, 31.75], [138.75, 31.85], [138.5, 31.75], [138.25, 31.85], [138.0, 31.75], [137.47, 31.97], [137.32, 32.32], [137.25, 32.35], [137.0, 32.25], [136.47, 32.47], [136.25, 33.0], [136.47, 33.53], [136.82, 33.68], [136.97, 34.03], [137.5, 34.25]]]]}, "2013-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.5, 34.25], [137.75, 34.15], [137.88, 34.2], [137.82, 34.32], [137.47, 34.47], [137.25, 35.0], [137.47, 35.53], [138.0, 35.75], [138.25, 35.65], [138.5, 35.75], [139.03, 35.53], [139.25, 35.0], [139.15, 34.75], [139.18, 34.68], [139.25, 34.65], [139.5, 34.75], [140.03, 34.53], [140.18, 34.18], [140.53, 34.03], [140.68, 33.68], [141.03, 33.53], [141.25, 33.0], [141.03, 32.47], [140.5, 32.25], [140.25, 32.35], [140.18, 32.32], [140.03, 31.97], [139.5, 31.75], [139.25, 31.85], [139.0, 31.75], [138.75, 31.85], [138.5, 31.75], [138.25, 31.85], [138.0, 31.75], [137.47, 31.97], [137.32, 32.32], [137.25, 32.35], [137.0, 32.25], [136.47, 32.47], [136.25, 33.0], [136.47, 33.53], [136.82, 33.68], [136.97, 34.03], [137.5, 34.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.234994591818804}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.914171019959146}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.549048555750232, 12.356123071250579, 13.14912675906777]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.597460251363202, 3.727283127562771, 4.423744675174021]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.245471405881643, -4.260700943320143, -3.236340710675652]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.234994591818804, -5.025790607571423, -3.9862413593471047]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.101809978026577, -2.049470858215635, -1.4972708343018173]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.528630094153046, -2.3977604363113985, -1.6318357441708489]}}