{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:42.496944", "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": "2015-Apr-09_to_2015-Apr-12_102.5_26.5"}, "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": 2015040000433}, "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": "April 09 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 61275.4157385749}, "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": ["China"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": []}, "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": 26.5}, "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": 102.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "102.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 101.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 104.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.97, 27.53], [103.5, 27.75], [104.03, 27.53], [104.18, 27.18], [104.53, 27.03], [104.68, 26.68], [105.03, 26.53], [105.25, 26.0], [105.15, 25.75], [105.25, 25.5], [105.03, 24.97], [104.5, 24.75], [103.97, 24.97], [103.82, 25.32], [103.47, 25.47], [103.32, 25.82], [102.97, 25.97], [102.75, 26.5], [102.85, 26.75], [102.75, 27.0], [102.97, 27.53]]]]}, "2015-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.47, 28.03], [102.0, 28.25], [102.53, 28.03], [102.68, 27.68], [103.0, 27.54], [103.5, 27.75], [104.03, 27.53], [104.18, 27.18], [104.53, 27.03], [104.68, 26.68], [105.03, 26.53], [105.25, 26.0], [105.15, 25.75], [105.25, 25.5], [105.03, 24.97], [104.5, 24.75], [104.2, 24.88], [104.15, 24.75], [104.18, 24.68], [104.53, 24.53], [104.75, 24.0], [104.65, 23.75], [104.75, 23.5], [104.53, 22.97], [104.0, 22.75], [103.47, 22.97], [103.32, 23.32], [102.97, 23.47], [102.82, 23.82], [102.47, 23.97], [102.25, 24.5], [102.35, 24.75], [102.25, 25.0], [102.35, 25.25], [102.32, 25.32], [101.97, 25.47], [101.82, 25.82], [101.47, 25.97], [101.25, 26.5], [101.46, 27.0], [101.25, 27.5], [101.47, 28.03]]]]}, "2015-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.47, 28.03], [102.0, 28.25], [102.53, 28.03], [102.68, 27.68], [103.0, 27.54], [103.5, 27.75], [104.03, 27.53], [104.18, 27.18], [104.53, 27.03], [104.68, 26.68], [105.03, 26.53], [105.25, 26.0], [105.15, 25.75], [105.25, 25.5], [105.03, 24.97], [104.5, 24.75], [104.2, 24.88], [104.15, 24.75], [104.18, 24.68], [104.53, 24.53], [104.75, 24.0], [104.65, 23.75], [104.75, 23.5], [104.53, 22.97], [104.0, 22.75], [103.47, 22.97], [103.32, 23.32], [102.97, 23.47], [102.82, 23.82], [102.47, 23.97], [102.25, 24.5], [102.35, 24.75], [102.25, 25.0], [102.35, 25.25], [102.32, 25.32], [101.97, 25.47], [101.82, 25.82], [101.47, 25.97], [101.25, 26.5], [101.46, 27.0], [101.25, 27.5], [101.47, 28.03]]]]}, "2015-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.47, 28.03], [102.0, 28.25], [102.53, 28.03], [102.68, 27.68], [103.03, 27.53], [103.18, 27.18], [103.53, 27.03], [103.75, 26.5], [103.65, 26.25], [103.68, 26.18], [104.03, 26.03], [104.25, 25.5], [104.15, 25.25], [104.25, 25.0], [104.15, 24.75], [104.18, 24.68], [104.53, 24.53], [104.75, 24.0], [104.65, 23.75], [104.75, 23.5], [104.53, 22.97], [104.0, 22.75], [103.47, 22.97], [103.32, 23.32], [102.97, 23.47], [102.82, 23.82], [102.47, 23.97], [102.25, 24.5], [102.35, 24.75], [102.25, 25.0], [102.35, 25.25], [102.32, 25.32], [101.97, 25.47], [101.82, 25.82], [101.47, 25.97], [101.25, 26.5], [101.46, 27.0], [101.25, 27.5], [101.47, 28.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.946269412568597}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.853806082300941}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.230590430835662, 11.020609543603712, 11.005567255002063, 12.13118897139725]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.112434055186952, 7.476550484430277, 7.5347036620138965, 8.840901568111121]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.306578524693056, -5.8110868690660515, -5.8635328022920445, -5.7293810946141015]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.69023024845751, -7.22523116016896, -7.140510703772065, -7.946269412568597]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5419825639112357, -1.693544081102908, -1.7205889976614777, -1.816464619558999]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5713544204963517, -1.9844314910145446, -2.0122592035587408, -2.605869793890698]}}