{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:51.117290", "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": "2025-Nov-24_to_2025-Nov-29_80.5_7.5"}, "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": 2025110000677}, "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 24 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 29 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 52089.994516467734}, "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": ["Sri Lanka"]}, "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": 7.5}, "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": 80.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "80.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 80.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 81.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 6.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[79.35, 7.75], [79.25, 8.0], [79.35, 8.25], [79.25, 8.5], [79.47, 9.03], [79.82, 9.18], [79.97, 9.53], [80.5, 9.75], [81.03, 9.53], [81.18, 9.18], [81.53, 9.03], [81.75, 8.5], [81.65, 8.25], [81.75, 8.0], [81.65, 7.75], [81.68, 7.68], [82.03, 7.53], [82.25, 7.0], [82.03, 6.47], [81.5, 6.25], [81.25, 6.35], [81.18, 6.32], [81.15, 6.25], [81.25, 6.0], [81.03, 5.47], [80.5, 5.25], [79.97, 5.47], [79.82, 5.82], [79.47, 5.97], [79.25, 6.5], [79.35, 6.75], [79.25, 7.0], [79.35, 7.25], [79.25, 7.5], [79.35, 7.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia", "Bay-of-Bengal", "Equatorial.Indian-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.25, 8.0], [79.47, 8.53], [79.82, 8.68], [79.97, 9.03], [80.5, 9.25], [80.75, 9.15], [81.0, 9.25], [81.53, 9.03], [81.75, 8.5], [81.65, 8.25], [81.75, 8.0], [81.65, 7.75], [81.75, 7.5], [81.53, 6.97], [81.0, 6.75], [80.75, 6.85], [80.5, 6.75], [80.25, 6.85], [80.0, 6.75], [79.47, 6.97], [79.25, 7.5], [79.35, 7.75], [79.25, 8.0]]]]}, "2025-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.25, 7.5], [79.35, 7.75], [79.25, 8.0], [79.47, 8.53], [79.82, 8.68], [79.97, 9.03], [80.5, 9.25], [80.75, 9.15], [81.0, 9.25], [81.53, 9.03], [81.75, 8.5], [81.65, 8.25], [81.75, 8.0], [81.65, 7.75], [81.68, 7.68], [82.03, 7.53], [82.25, 7.0], [82.03, 6.47], [81.5, 6.25], [81.25, 6.35], [81.0, 6.25], [80.5, 6.46], [80.0, 6.25], [79.47, 6.47], [79.25, 7.0], [79.35, 7.25], [79.25, 7.5]]]]}, "2025-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.25, 7.0], [79.35, 7.25], [79.25, 7.5], [79.35, 7.75], [79.25, 8.0], [79.35, 8.25], [79.25, 8.5], [79.47, 9.03], [79.82, 9.18], [79.97, 9.53], [80.5, 9.75], [81.03, 9.53], [81.18, 9.18], [81.53, 9.03], [81.75, 8.5], [81.65, 8.25], [81.75, 8.0], [81.65, 7.75], [81.68, 7.68], [82.03, 7.53], [82.25, 7.0], [82.03, 6.47], [81.5, 6.25], [81.25, 6.35], [81.18, 6.32], [81.15, 6.25], [81.25, 6.0], [81.03, 5.47], [80.5, 5.25], [79.97, 5.47], [79.82, 5.82], [79.47, 5.97], [79.25, 6.5], [79.35, 6.75], [79.25, 7.0]]]]}, "2025-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.25, 7.0], [79.35, 7.25], [79.25, 7.5], [79.35, 7.75], [79.25, 8.0], [79.35, 8.25], [79.25, 8.5], [79.47, 9.03], [79.82, 9.18], [79.97, 9.53], [80.5, 9.75], [81.03, 9.53], [81.18, 9.18], [81.53, 9.03], [81.75, 8.5], [81.65, 8.25], [81.75, 8.0], [81.65, 7.75], [81.68, 7.68], [82.03, 7.53], [82.25, 7.0], [82.03, 6.47], [81.5, 6.25], [81.25, 6.35], [81.18, 6.32], [81.15, 6.25], [81.25, 6.0], [81.03, 5.47], [80.5, 5.25], [79.97, 5.47], [79.82, 5.82], [79.47, 5.97], [79.25, 6.5], [79.35, 6.75], [79.25, 7.0]]]]}, "2025-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.25, 7.0], [79.35, 7.25], [79.25, 7.5], [79.35, 7.75], [79.25, 8.0], [79.35, 8.25], [79.25, 8.5], [79.47, 9.03], [79.82, 9.18], [79.97, 9.53], [80.5, 9.75], [81.03, 9.53], [81.18, 9.18], [81.53, 9.03], [81.75, 8.5], [81.65, 8.25], [81.75, 8.0], [81.65, 7.75], [81.75, 7.5], [81.53, 6.97], [81.18, 6.82], [81.15, 6.75], [81.25, 6.5], [81.15, 6.25], [81.25, 6.0], [81.03, 5.47], [80.5, 5.25], [79.97, 5.47], [79.82, 5.82], [79.47, 5.97], [79.25, 6.5], [79.35, 6.75], [79.25, 7.0]]]]}, "2025-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.25, 7.0], [79.35, 7.25], [79.25, 7.5], [79.35, 7.75], [79.25, 8.0], [79.35, 8.25], [79.25, 8.5], [79.47, 9.03], [79.82, 9.18], [79.97, 9.53], [80.5, 9.75], [81.03, 9.53], [81.18, 9.18], [81.53, 9.03], [81.75, 8.5], [81.65, 8.25], [81.75, 8.0], [81.65, 7.75], [81.75, 7.5], [81.53, 6.97], [81.18, 6.82], [81.15, 6.75], [81.25, 6.5], [81.03, 5.97], [80.5, 5.75], [80.25, 5.85], [80.0, 5.75], [79.47, 5.97], [79.25, 6.5], [79.35, 6.75], [79.25, 7.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.2378246303716196}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.689247332237452}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.443404134114644, 24.09069999926021, 23.794435643214854, 23.110248221603115, 23.412907070583742, 22.990516008649593]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.51880289713546, 20.544727579752646, 20.090037282307946, 19.744841512044275, 19.347759501139365, 19.323948160807333]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.163283115008042, -1.1394803724082863, -1.3362016049179768, -1.9888505339062823, -1.9049408350375832, -2.2555523815242435]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.3083782377958073, -1.4619284109993487, -1.8903298920097313, -2.8150091853868844, -2.9050298565608728, -3.2378246303716196]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5669220590462674, -1.5647535515134983, -1.9246494887514392, -2.864157205809435, -2.7582796658653543, -3.173948955936642]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7859759741954786, -1.8560199587500619, -2.4614036976056144, -4.426147152444686, -4.877328905890093, -4.891714570577234]}}