{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:03.038072", "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-Aug-27_to_2025-Sep-04_288.0_-17.0"}, "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": 2025080000884}, "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": "August 27 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 04 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 59450.84930481537}, "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": ["Peru"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America"]}, "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": ["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": -17.0}, "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": 288.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "288.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 284.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 289.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-72.68, -17.18], [-72.75, -17.15], [-73.0, -17.25], [-73.53, -17.03], [-73.68, -16.68], [-73.75, -16.65], [-74.0, -16.75], [-74.53, -16.53], [-74.68, -16.18], [-74.75, -16.15], [-75.0, -16.25], [-75.53, -16.03], [-75.68, -15.68], [-76.03, -15.53], [-76.18, -15.18], [-76.53, -15.03], [-76.75, -14.5], [-76.65, -14.25], [-76.75, -14.0], [-76.65, -13.75], [-76.75, -13.5], [-76.53, -12.97], [-76.0, -12.75], [-75.47, -12.97], [-75.25, -13.5], [-75.35, -13.75], [-75.32, -13.82], [-74.97, -13.97], [-74.82, -14.32], [-74.47, -14.47], [-74.32, -14.82], [-74.25, -14.85], [-74.0, -14.75], [-73.47, -14.97], [-73.32, -15.32], [-73.25, -15.35], [-73.0, -15.25], [-72.47, -15.47], [-72.32, -15.82], [-72.25, -15.85], [-72.0, -15.75], [-71.47, -15.97], [-71.32, -16.32], [-70.97, -16.47], [-70.82, -16.82], [-70.75, -16.85], [-70.5, -16.75], [-69.97, -16.97], [-69.75, -17.5], [-69.85, -17.75], [-69.75, -18.0], [-69.97, -18.53], [-70.5, -18.75], [-71.03, -18.53], [-71.18, -18.18], [-71.53, -18.03], [-71.68, -17.68], [-71.75, -17.65], [-72.0, -17.75], [-72.53, -17.53], [-72.68, -17.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.South-America", "S.W.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.75, -14.0], [-76.52999999999997, -13.47], [-76.0, -13.25], [-75.47000000000003, -13.47], [-75.25, -14.0], [-75.35000000000002, -14.25], [-75.32, -14.32], [-74.97000000000003, -14.47], [-74.75, -15.0], [-74.97000000000003, -15.53], [-75.5, -15.75], [-76.02999999999997, -15.53], [-76.18, -15.18], [-76.52999999999997, -15.03], [-76.75, -14.5], [-76.64999999999998, -14.25], [-76.75, -14.0]]]]}, "2025-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.75, -14.0], [-76.52999999999997, -13.47], [-76.0, -13.25], [-75.47000000000003, -13.47], [-75.32, -13.82], [-74.97000000000003, -13.97], [-74.75, -14.5], [-74.85000000000002, -14.75], [-74.82, -14.82], [-74.47000000000003, -14.97], [-74.25, -15.5], [-74.47000000000003, -16.03], [-75.0, -16.25], [-75.52999999999997, -16.03], [-75.68, -15.68], [-76.02999999999997, -15.53], [-76.18, -15.18], [-76.52999999999997, -15.03], [-76.75, -14.5], [-76.64999999999998, -14.25], [-76.75, -14.0]]]]}, "2025-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.75, -14.0], [-76.64999999999998, -13.75], [-76.75, -13.5], [-76.52999999999997, -12.97], [-76.0, -12.75], [-75.47000000000003, -12.97], [-75.25, -13.5], [-75.35000000000002, -13.75], [-75.32, -13.82], [-74.97000000000003, -13.97], [-74.82, -14.32], [-74.47000000000003, -14.47], [-74.32, -14.82], [-73.97000000000003, -14.97], [-73.82, -15.32], [-73.75, -15.35], [-73.5, -15.25], [-73.25, -15.35], [-73.0, -15.25], [-72.47000000000003, -15.47], [-72.32, -15.82], [-72.25, -15.85], [-72.0, -15.75], [-71.47000000000003, -15.97], [-71.32, -16.32], [-70.97000000000003, -16.47], [-70.82, -16.82], [-70.75, -16.85], [-70.5, -16.75], [-69.97000000000003, -16.97], [-69.75, -17.5], [-69.85000000000002, -17.75], [-69.75, -18.0], [-69.97000000000003, -18.53], [-70.5, -18.75], [-71.02999999999997, -18.53], [-71.18, -18.18], [-71.52999999999997, -18.03], [-71.68, -17.68], [-71.75, -17.65], [-72.0, -17.75], [-72.52999999999997, -17.53], [-72.68, -17.18], [-72.75, -17.15], [-73.0, -17.25], [-73.52999999999997, -17.03], [-73.68, -16.68], [-73.75, -16.65], [-74.0, -16.75], [-74.52999999999997, -16.53], [-74.68, -16.18], [-74.75, -16.15], [-75.0, -16.25], [-75.52999999999997, -16.03], [-75.68, -15.68], [-76.02999999999997, -15.53], [-76.18, -15.18], [-76.52999999999997, -15.03], [-76.75, -14.5], [-76.64999999999998, -14.25], [-76.75, -14.0]]]]}, "2025-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.75, -14.0], [-76.64999999999998, -13.75], [-76.75, -13.5], [-76.52999999999997, -12.97], [-76.0, -12.75], [-75.47000000000003, -12.97], [-75.25, -13.5], [-75.35000000000002, -13.75], [-75.32, -13.82], [-74.97000000000003, -13.97], [-74.82, -14.32], [-74.47000000000003, -14.47], [-74.32, -14.82], [-74.25, -14.85], [-74.0, -14.75], [-73.47000000000003, -14.97], [-73.32, -15.32], [-73.25, -15.35], [-73.0, -15.25], [-72.47000000000003, -15.47], [-72.32, -15.82], [-72.25, -15.85], [-72.0, -15.75], [-71.47000000000003, -15.97], [-71.32, -16.32], [-70.97000000000003, -16.47], [-70.82, -16.82], [-70.75, -16.85], [-70.5, -16.75], [-69.97000000000003, -16.97], [-69.75, -17.5], [-69.85000000000002, -17.75], [-69.75, -18.0], [-69.97000000000003, -18.53], [-70.5, -18.75], [-71.02999999999997, -18.53], [-71.18, -18.18], [-71.52999999999997, -18.03], [-71.68, -17.68], [-71.75, -17.65], [-72.0, -17.75], [-72.52999999999997, -17.53], [-72.68, -17.18], [-72.75, -17.15], [-73.0, -17.25], [-73.52999999999997, -17.03], [-73.68, -16.68], [-73.75, -16.65], [-74.0, -16.75], [-74.52999999999997, -16.53], [-74.68, -16.18], [-74.75, -16.15], [-75.0, -16.25], [-75.52999999999997, -16.03], [-75.68, -15.68], [-76.02999999999997, -15.53], [-76.18, -15.18], [-76.52999999999997, -15.03], [-76.75, -14.5], [-76.64999999999998, -14.25], [-76.75, -14.0]]]]}, "2025-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.75, -14.0], [-76.64999999999998, -13.75], [-76.75, -13.5], [-76.52999999999997, -12.97], [-76.0, -12.75], [-75.47000000000003, -12.97], [-75.25, -13.5], [-75.35000000000002, -13.75], [-75.32, -13.82], [-74.97000000000003, -13.97], [-74.82, -14.32], [-74.47000000000003, -14.47], [-74.32, -14.82], [-74.25, -14.85], [-74.0, -14.75], [-73.47000000000003, -14.97], [-73.32, -15.32], [-73.25, -15.35], [-73.0, -15.25], [-72.47000000000003, -15.47], [-72.32, -15.82], [-72.25, -15.85], [-72.0, -15.75], [-71.47000000000003, -15.97], [-71.32, -16.32], [-70.97000000000003, -16.47], [-70.82, -16.82], [-70.75, -16.85], [-70.5, -16.75], [-69.97000000000003, -16.97], [-69.75, -17.5], [-69.85000000000002, -17.75], [-69.75, -18.0], [-69.97000000000003, -18.53], [-70.5, -18.75], [-71.02999999999997, -18.53], [-71.18, -18.18], [-71.52999999999997, -18.03], [-71.68, -17.68], [-71.75, -17.65], [-72.0, -17.75], [-72.52999999999997, -17.53], [-72.68, -17.18], [-72.75, -17.15], [-73.0, -17.25], [-73.52999999999997, -17.03], [-73.68, -16.68], [-73.75, -16.65], [-74.0, -16.75], [-74.52999999999997, -16.53], [-74.68, -16.18], [-74.75, -16.15], [-75.0, -16.25], [-75.52999999999997, -16.03], [-75.68, -15.68], [-76.02999999999997, -15.53], [-76.18, -15.18], [-76.52999999999997, -15.03], [-76.75, -14.5], [-76.64999999999998, -14.25], [-76.75, -14.0]]]]}, "2025-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.02999999999997, -18.53], [-71.25, -18.0], [-71.02999999999997, -17.47], [-70.5, -17.25], [-69.97000000000003, -17.47], [-69.75, -18.0], [-69.97000000000003, -18.53], [-70.5, -18.75], [-71.02999999999997, -18.53]]], [[[-72.52999999999997, -17.53], [-72.75, -17.0], [-72.52999999999997, -16.47], [-72.0, -16.25], [-71.47000000000003, -16.47], [-71.25, -17.0], [-71.47000000000003, -17.53], [-72.0, -17.75], [-72.52999999999997, -17.53]]], [[[-74.52999999999997, -14.97], [-74.0, -14.75], [-73.47000000000003, -14.97], [-73.32, -15.32], [-72.97000000000003, -15.47], [-72.75, -16.0], [-72.97000000000003, -16.53], [-73.5, -16.75], [-74.02999999999997, -16.53], [-74.18, -16.18], [-74.52999999999997, -16.03], [-74.75, -15.5], [-74.52999999999997, -14.97]]], [[[-76.52999999999997, -13.97], [-76.0, -13.75], [-75.47000000000003, -13.97], [-75.32, -14.32], [-74.97000000000003, -14.47], [-74.75, -15.0], [-74.97000000000003, -15.53], [-75.5, -15.75], [-76.02999999999997, -15.53], [-76.18, -15.18], [-76.52999999999997, -15.03], [-76.75, -14.5], [-76.52999999999997, -13.97]]]]}, "2025-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.5, -18.75], [-71.02999999999997, -18.53], [-71.25, -18.0], [-71.02999999999997, -17.47], [-70.5, -17.25], [-69.97000000000003, -17.47], [-69.75, -18.0], [-69.97000000000003, -18.53], [-70.5, -18.75]]], [[[-72.0, -17.75], [-72.52999999999997, -17.53], [-72.75, -17.0], [-72.52999999999997, -16.47], [-72.0, -16.25], [-71.47000000000003, -16.47], [-71.25, -17.0], [-71.47000000000003, -17.53], [-72.0, -17.75]]]]}, "2025-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.5, -18.75], [-71.02999999999997, -18.53], [-71.25, -18.0], [-71.02999999999997, -17.47], [-70.5, -17.25], [-69.97000000000003, -17.47], [-69.75, -18.0], [-69.97000000000003, -18.53], [-70.5, -18.75]]], [[[-72.0, -17.75], [-72.52999999999997, -17.53], [-72.75, -17.0], [-72.52999999999997, -16.47], [-72.0, -16.25], [-71.47000000000003, -16.47], [-71.25, -17.0], [-71.47000000000003, -17.53], [-72.0, -17.75]]]]}, "2025-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.5, -18.75], [-71.02999999999997, -18.53], [-71.25, -18.0], [-71.02999999999997, -17.47], [-70.5, -17.25], [-69.97000000000003, -17.47], [-69.75, -18.0], [-69.97000000000003, -18.53], [-70.5, -18.75]]], [[[-72.0, -17.75], [-72.52999999999997, -17.53], [-72.75, -17.0], [-72.52999999999997, -16.47], [-72.0, -16.25], [-71.47000000000003, -16.47], [-71.25, -17.0], [-71.47000000000003, -17.53], [-72.0, -17.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.673172179514836}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9634482021718853}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.862370639377161, 14.581990305582679, 14.434302266438806, 14.321927897135424, 14.267818450927734, 13.958856625027181, 13.863821919759175, 13.878577168782556, 13.886698659261128]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.736990865071618, 13.469164784749353, 12.886287943522177, 12.974389648437523, 12.201212819417321, 12.956103261311853, 13.41566111246749, 13.549719746907556, 13.497253672281943]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.150978020331877, -1.348510610693347, -2.0806495604925943, -2.133016881477377, -2.223649688857404, -1.4501323707140539, -1.591017289487695, -1.5985783200838455, -1.585631178817124]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.2407059614764648, -2.0085429018498075, -3.0644303435529423, -3.673172179514836, -3.6227327665489497, -2.0392586242124366, -1.6179576258797397, -1.6864007429953745, -1.603010614359107]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.327204485875269, -1.409411486678781, -1.7706340019986826, -1.8394263341251276, -1.9274279663947305, -1.4466492057820861, -1.538225504081777, -1.526102556392387, -1.5393625404422886]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3846017263514512, -2.3319728247655065, -2.508504626920259, -2.3955141570328236, -2.528293553943308, -1.9351770661523657, -1.5776282696179718, -1.6770291694435693, -1.6263868787555338]}}