{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:22.835977", "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": "2011-Sep-15_to_2011-Sep-19_131.0_1.0"}, "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": 2011090000700}, "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 15 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 19 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 71084.31667936905}, "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": ["Indonesia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.Asia"]}, "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": ["Halmahera Sea", "North Pacific Ocean"]}, "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": 1.0}, "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": 131.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "131.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 127.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 131.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -0.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 2.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[127.47, 0.53], [128.0, 0.75], [128.25, 0.65], [128.5, 0.75], [128.75, 0.65], [128.82, 0.68], [128.97, 1.03], [129.32, 1.18], [129.47, 1.53], [130.0, 1.75], [130.5, 1.54], [131.0, 1.75], [131.53, 1.53], [131.75, 1.0], [131.65, 0.75], [131.75, 0.5], [131.53, -0.03], [131.0, -0.25], [130.75, -0.15], [130.5, -0.25], [130.25, -0.15], [130.0, -0.25], [129.75, -0.15], [129.68, -0.18], [129.65, -0.25], [129.75, -0.5], [129.53, -1.03], [129.0, -1.25], [128.75, -1.15], [128.5, -1.25], [128.25, -1.15], [128.0, -1.25], [127.47, -1.03], [127.25, -0.5], [127.35, -0.25], [127.25, 0.0], [127.47, 0.53]]]]}, "2011-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[127.35, 0.25], [127.25, 0.5], [127.35, 0.75], [127.25, 1.0], [127.47, 1.53], [127.88, 1.7], [127.75, 2.0], [127.97, 2.53], [128.5, 2.75], [128.75, 2.65], [129.0, 2.75], [129.53, 2.53], [129.68, 2.18], [129.75, 2.15], [130.0, 2.25], [130.53, 2.03], [130.7, 1.63], [131.0, 1.75], [131.53, 1.53], [131.75, 1.0], [131.65, 0.75], [131.75, 0.5], [131.53, -0.03], [131.0, -0.25], [130.75, -0.15], [130.5, -0.25], [130.25, -0.15], [130.0, -0.25], [129.75, -0.15], [129.68, -0.18], [129.65, -0.25], [129.75, -0.5], [129.53, -1.03], [129.0, -1.25], [128.75, -1.15], [128.5, -1.25], [128.25, -1.15], [128.0, -1.25], [127.47, -1.03], [127.25, -0.5], [127.35, -0.25], [127.25, 0.0], [127.35, 0.25]]]]}, "2011-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[127.35, 0.25], [127.25, 0.5], [127.35, 0.75], [127.25, 1.0], [127.47, 1.53], [127.88, 1.7], [127.75, 2.0], [127.97, 2.53], [128.5, 2.75], [128.75, 2.65], [129.0, 2.75], [129.53, 2.53], [129.68, 2.18], [129.75, 2.15], [130.0, 2.25], [130.53, 2.03], [130.7, 1.63], [131.0, 1.75], [131.53, 1.53], [131.75, 1.0], [131.65, 0.75], [131.75, 0.5], [131.53, -0.03], [131.0, -0.25], [130.75, -0.15], [130.5, -0.25], [130.25, -0.15], [130.0, -0.25], [129.75, -0.15], [129.68, -0.18], [129.65, -0.25], [129.75, -0.5], [129.53, -1.03], [129.0, -1.25], [128.75, -1.15], [128.5, -1.25], [128.25, -1.15], [128.0, -1.25], [127.47, -1.03], [127.25, -0.5], [127.35, -0.25], [127.25, 0.0], [127.35, 0.25]]]]}, "2011-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[127.35, 0.75], [127.25, 1.0], [127.47, 1.53], [127.88, 1.7], [127.75, 2.0], [127.97, 2.53], [128.5, 2.75], [128.75, 2.65], [129.0, 2.75], [129.53, 2.53], [129.68, 2.18], [129.75, 2.15], [130.0, 2.25], [130.53, 2.03], [130.7, 1.63], [131.0, 1.75], [131.53, 1.53], [131.75, 1.0], [131.65, 0.75], [131.75, 0.5], [131.53, -0.03], [131.0, -0.25], [130.75, -0.15], [130.5, -0.25], [130.25, -0.15], [130.0, -0.25], [129.75, -0.15], [129.68, -0.18], [129.53, -0.53], [129.18, -0.68], [129.03, -1.03], [128.5, -1.25], [127.97, -1.03], [127.82, -0.68], [127.47, -0.53], [127.25, 0.0], [127.35, 0.25], [127.25, 0.5], [127.35, 0.75]]]]}, "2011-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.0, 1.75], [131.53, 1.53], [131.75, 1.0], [131.53, 0.47], [131.0, 0.25], [130.47, 0.47], [130.25, 1.0], [130.47, 1.53], [131.0, 1.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.4252295040216723}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.9989145869572937}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.88359437298925, 25.555235337868112, 25.835505948697403, 25.766030731860155, 26.409987412126554]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.28394729949315, 23.791702502313, 24.213938075289434, 24.36592087784601, 26.409987412126554]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.9547590370513129, -1.1372870551547367, -0.8855817930203883, -1.0018781274733843, -0.8906343269987929]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.3241256464391995, -1.4252295040216723, -1.0949403048000477, -1.2031830322441124, -0.8906343269987929]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6258869683013646, -1.8899287933145308, -1.4800452158665849, -1.6381260365169064, -1.399907681896346]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.012278084283187, -2.1968844801812475, -1.844005621550057, -1.9958969647107105, -1.399907681896346]}}