{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:53:09.576452", "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": "2024-Sep-29_to_2024-Oct-01_103.5_36.5"}, "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": 2024090000584}, "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 29 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 01 2024"}, "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": 71353.13879133537}, "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", "E.C.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": 36.5}, "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": 103.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "103.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 102.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 107.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.25, 36.5], [102.47, 37.03], [102.88, 37.2], [102.75, 37.5], [102.85, 37.75], [102.75, 38.0], [102.97, 38.53], [103.5, 38.75], [103.75, 38.65], [104.0, 38.75], [104.25, 38.65], [104.5, 38.75], [104.8, 38.63], [104.85, 38.75], [104.75, 39.0], [104.97, 39.53], [105.5, 39.75], [105.75, 39.65], [105.82, 39.68], [105.97, 40.03], [106.5, 40.25], [107.03, 40.03], [107.25, 39.5], [107.03, 38.97], [106.68, 38.82], [106.53, 38.47], [106.18, 38.32], [106.15, 38.25], [106.25, 38.0], [106.15, 37.75], [106.18, 37.68], [106.25, 37.65], [106.5, 37.75], [106.75, 37.65], [107.0, 37.75], [107.53, 37.53], [107.75, 37.0], [107.53, 36.47], [107.18, 36.32], [107.03, 35.97], [106.68, 35.82], [106.53, 35.47], [106.0, 35.25], [105.5, 35.46], [105.0, 35.25], [104.5, 35.46], [104.0, 35.25], [103.75, 35.35], [103.5, 35.25], [102.97, 35.47], [102.82, 35.82], [102.47, 35.97], [102.25, 36.5]]]]}, "2024-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.25, 36.5], [102.47, 37.03], [102.88, 37.2], [102.75, 37.5], [102.85, 37.75], [102.75, 38.0], [102.97, 38.53], [103.5, 38.75], [103.75, 38.65], [104.0, 38.75], [104.25, 38.65], [104.5, 38.75], [104.8, 38.63], [104.85, 38.75], [104.75, 39.0], [104.97, 39.53], [105.5, 39.75], [105.75, 39.65], [105.82, 39.68], [105.97, 40.03], [106.5, 40.25], [107.03, 40.03], [107.25, 39.5], [107.03, 38.97], [106.68, 38.82], [106.53, 38.47], [106.18, 38.32], [106.15, 38.25], [106.25, 38.0], [106.15, 37.75], [106.18, 37.68], [106.25, 37.65], [106.5, 37.75], [106.75, 37.65], [107.0, 37.75], [107.53, 37.53], [107.75, 37.0], [107.53, 36.47], [107.18, 36.32], [107.03, 35.97], [106.68, 35.82], [106.53, 35.47], [106.0, 35.25], [105.5, 35.46], [105.0, 35.25], [104.5, 35.46], [104.0, 35.25], [103.75, 35.35], [103.5, 35.25], [102.97, 35.47], [102.82, 35.82], [102.47, 35.97], [102.25, 36.5]]]]}, "2024-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.25, 36.5], [102.47, 37.03], [102.88, 37.2], [102.75, 37.5], [102.85, 37.75], [102.75, 38.0], [102.97, 38.53], [103.5, 38.75], [103.75, 38.65], [104.0, 38.75], [104.25, 38.65], [104.5, 38.75], [104.8, 38.63], [104.85, 38.75], [104.75, 39.0], [104.97, 39.53], [105.5, 39.75], [105.75, 39.65], [105.82, 39.68], [105.97, 40.03], [106.5, 40.25], [107.03, 40.03], [107.25, 39.5], [107.03, 38.97], [106.68, 38.82], [106.53, 38.47], [106.18, 38.32], [106.15, 38.25], [106.25, 38.0], [106.15, 37.75], [106.18, 37.68], [106.25, 37.65], [106.5, 37.75], [106.75, 37.65], [107.0, 37.75], [107.53, 37.53], [107.75, 37.0], [107.53, 36.47], [107.18, 36.32], [107.03, 35.97], [106.68, 35.82], [106.53, 35.47], [106.0, 35.25], [105.5, 35.46], [105.0, 35.25], [104.5, 35.46], [104.0, 35.25], [103.75, 35.35], [103.5, 35.25], [102.97, 35.47], [102.82, 35.82], [102.47, 35.97], [102.25, 36.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.726097877211487}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.422379981070629}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.324520716173879, 6.455661501829695, 7.506674702962243]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.559271748860681, 3.212665812174521, 5.643800354003929]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.417202938693634, -6.0640400206538025, -4.785896983864451]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.248320350008214, -7.726097877211487, -6.524908048006125]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9550225786879236, -2.1248334657388166, -1.6475637468445943]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5845818758339636, -2.731682854617367, -1.9128808876755568]}}