{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:33.162955", "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": "2021-Dec-22_to_2021-Dec-25_91.5_10.5"}, "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": 2021120000744}, "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": "December 22 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 25 2021"}, "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": 78893.18148298863}, "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": ["India"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Bay-of-Bengal", "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": ["Andaman or Burma Sea", "Bay of Bengal"]}, "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": 10.5}, "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": 91.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "91.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 90.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 94.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 9.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.25, 10.5], [90.47, 11.03], [90.82, 11.18], [90.97, 11.53], [91.32, 11.68], [91.47, 12.03], [92.0, 12.25], [92.25, 12.15], [92.32, 12.18], [92.47, 12.53], [93.0, 12.75], [93.25, 12.65], [93.32, 12.68], [93.47, 13.03], [94.0, 13.25], [94.25, 13.15], [94.5, 13.25], [95.03, 13.03], [95.25, 12.5], [95.03, 11.97], [94.68, 11.82], [94.65, 11.75], [94.75, 11.5], [94.53, 10.97], [94.18, 10.82], [94.03, 10.47], [93.68, 10.32], [93.53, 9.97], [93.18, 9.82], [93.03, 9.47], [92.5, 9.25], [92.25, 9.35], [92.0, 9.25], [91.75, 9.35], [91.68, 9.32], [91.53, 8.97], [91.0, 8.75], [90.75, 8.85], [90.5, 8.75], [89.97, 8.97], [89.75, 9.5], [89.97, 10.03], [90.32, 10.18], [90.35, 10.25], [90.25, 10.5]]]]}, "2021-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.25, 10.5], [90.47, 11.03], [90.82, 11.18], [90.97, 11.53], [91.32, 11.68], [91.47, 12.03], [92.0, 12.25], [92.25, 12.15], [92.32, 12.18], [92.47, 12.53], [93.0, 12.75], [93.25, 12.65], [93.32, 12.68], [93.47, 13.03], [94.0, 13.25], [94.25, 13.15], [94.5, 13.25], [95.03, 13.03], [95.25, 12.5], [95.03, 11.97], [94.68, 11.82], [94.65, 11.75], [94.75, 11.5], [94.53, 10.97], [94.18, 10.82], [94.03, 10.47], [93.68, 10.32], [93.53, 9.97], [93.18, 9.82], [93.03, 9.47], [92.5, 9.25], [92.25, 9.35], [92.0, 9.25], [91.75, 9.35], [91.68, 9.32], [91.53, 8.97], [91.0, 8.75], [90.75, 8.85], [90.5, 8.75], [89.97, 8.97], [89.75, 9.5], [89.97, 10.03], [90.32, 10.18], [90.35, 10.25], [90.25, 10.5]]]]}, "2021-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.25, 10.5], [90.47, 11.03], [90.82, 11.18], [90.97, 11.53], [91.32, 11.68], [91.47, 12.03], [92.0, 12.25], [92.25, 12.15], [92.32, 12.18], [92.47, 12.53], [93.0, 12.75], [93.25, 12.65], [93.32, 12.68], [93.47, 13.03], [94.0, 13.25], [94.25, 13.15], [94.5, 13.25], [95.03, 13.03], [95.25, 12.5], [95.03, 11.97], [94.68, 11.82], [94.65, 11.75], [94.75, 11.5], [94.53, 10.97], [94.18, 10.82], [94.03, 10.47], [93.68, 10.32], [93.53, 9.97], [93.18, 9.82], [93.03, 9.47], [92.5, 9.25], [92.25, 9.35], [92.0, 9.25], [91.75, 9.35], [91.68, 9.32], [91.53, 8.97], [91.0, 8.75], [90.75, 8.85], [90.5, 8.75], [89.97, 8.97], [89.75, 9.5], [89.97, 10.03], [90.32, 10.18], [90.35, 10.25], [90.25, 10.5]]]]}, "2021-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.47, 11.03], [90.82, 11.18], [90.97, 11.53], [91.5, 11.75], [91.75, 11.65], [92.0, 11.75], [92.53, 11.53], [92.75, 11.0], [92.53, 10.47], [92.18, 10.32], [92.03, 9.97], [91.68, 9.82], [91.53, 9.47], [91.0, 9.25], [90.47, 9.47], [90.25, 10.0], [90.35, 10.25], [90.25, 10.5], [90.47, 11.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.9813305780917858}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.3566764814566339}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.622188614301933, 25.29727089968543, 25.71454509531634, 25.68935734161869]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.22757856986931, 25.062802171393116, 25.37487868365872, 25.47717230367914]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3057405946507243, -1.6174434887678417, -1.188004473283994, -1.1426490973268073]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.623529829034453, -1.9813305780917858, -1.4501721289519764, -1.3250547593710849]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2413213134806864, -2.7581131805126593, -2.039081060973196, -2.023152228827907]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.911992773103649, -3.2571335418824376, -2.6001423333759774, -2.337387405366856]}}