{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:49.905595", "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": "2026-Jan-18_to_2026-Jan-21_248.0_-27.0"}, "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": 2026010000547}, "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": "January 18 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 21 2026"}, "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": 132088.6061680344}, "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": ["Chile"]}, "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": -27.0}, "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": 248.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "248.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 245.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 252.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -29.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -26.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-108.5, -26.25], [-107.97, -26.47], [-107.82, -26.82], [-107.47, -26.97], [-107.32, -27.32], [-106.97, -27.47], [-106.75, -28.0], [-106.85, -28.25], [-106.75, -28.5], [-106.85, -28.75], [-106.75, -29.0], [-106.97, -29.53], [-107.5, -29.75], [-108.03, -29.53], [-108.18, -29.18], [-108.25, -29.15], [-108.5, -29.25], [-108.75, -29.15], [-109.0, -29.25], [-109.53, -29.03], [-109.68, -28.68], [-109.75, -28.65], [-110.0, -28.75], [-110.53, -28.53], [-110.68, -28.18], [-110.75, -28.15], [-111.0, -28.25], [-111.25, -28.15], [-111.5, -28.25], [-112.03, -28.03], [-112.18, -27.68], [-112.25, -27.65], [-112.5, -27.75], [-112.75, -27.65], [-113.0, -27.75], [-113.53, -27.53], [-113.68, -27.18], [-113.75, -27.15], [-114.0, -27.25], [-114.53, -27.03], [-114.68, -26.68], [-114.75, -26.65], [-115.0, -26.75], [-115.53, -26.53], [-115.75, -26.0], [-115.53, -25.47], [-115.0, -25.25], [-114.75, -25.35], [-114.5, -25.25], [-114.25, -25.35], [-114.0, -25.25], [-113.75, -25.35], [-113.5, -25.25], [-113.25, -25.35], [-113.0, -25.25], [-112.75, -25.35], [-112.5, -25.25], [-112.25, -25.35], [-112.0, -25.25], [-111.75, -25.35], [-111.5, -25.25], [-111.25, -25.35], [-111.0, -25.25], [-110.47, -25.47], [-110.32, -25.82], [-110.25, -25.85], [-110.0, -25.75], [-109.75, -25.85], [-109.5, -25.75], [-108.97, -25.97], [-108.82, -26.32], [-108.75, -26.35], [-108.5, -26.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-112.53, -27.53], [-112.75, -27.0], [-112.53, -26.47], [-112.0, -26.25], [-111.75, -26.35], [-111.5, -26.25], [-110.97, -26.47], [-110.82, -26.82], [-110.75, -26.85], [-110.5, -26.75], [-110.25, -26.85], [-110.0, -26.75], [-109.75, -26.85], [-109.68, -26.82], [-109.53, -26.47], [-109.0, -26.25], [-108.75, -26.35], [-108.5, -26.25], [-107.97, -26.47], [-107.82, -26.82], [-107.47, -26.97], [-107.32, -27.32], [-106.97, -27.47], [-106.75, -28.0], [-106.85, -28.25], [-106.75, -28.5], [-106.97, -29.03], [-107.5, -29.25], [-107.75, -29.15], [-108.0, -29.25], [-108.25, -29.15], [-108.5, -29.25], [-108.75, -29.15], [-109.0, -29.25], [-109.53, -29.03], [-109.68, -28.68], [-109.75, -28.65], [-110.0, -28.75], [-110.53, -28.53], [-110.68, -28.18], [-110.75, -28.15], [-111.0, -28.25], [-111.25, -28.15], [-111.5, -28.25], [-112.03, -28.03], [-112.18, -27.68], [-112.53, -27.53]]]]}, "2026-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.0, -26.75], [-115.53, -26.53], [-115.75, -26.0], [-115.53, -25.47], [-115.0, -25.25], [-114.75, -25.35], [-114.5, -25.25], [-114.25, -25.35], [-114.0, -25.25], [-113.75, -25.35], [-113.5, -25.25], [-113.25, -25.35], [-113.0, -25.25], [-112.75, -25.35], [-112.5, -25.25], [-112.25, -25.35], [-112.0, -25.25], [-111.75, -25.35], [-111.5, -25.25], [-111.25, -25.35], [-111.0, -25.25], [-110.47, -25.47], [-110.32, -25.82], [-110.25, -25.85], [-110.0, -25.75], [-109.75, -25.85], [-109.5, -25.75], [-108.97, -25.97], [-108.82, -26.32], [-108.75, -26.35], [-108.5, -26.25], [-107.97, -26.47], [-107.82, -26.82], [-107.47, -26.97], [-107.32, -27.32], [-106.97, -27.47], [-106.75, -28.0], [-106.85, -28.25], [-106.75, -28.5], [-106.85, -28.75], [-106.75, -29.0], [-106.97, -29.53], [-107.5, -29.75], [-108.03, -29.53], [-108.18, -29.18], [-108.25, -29.15], [-108.5, -29.25], [-108.75, -29.15], [-109.0, -29.25], [-109.53, -29.03], [-109.68, -28.68], [-109.75, -28.65], [-110.0, -28.75], [-110.53, -28.53], [-110.68, -28.18], [-110.75, -28.15], [-111.0, -28.25], [-111.25, -28.15], [-111.5, -28.25], [-112.03, -28.03], [-112.18, -27.68], [-112.25, -27.65], [-112.5, -27.75], [-112.75, -27.65], [-113.0, -27.75], [-113.53, -27.53], [-113.68, -27.18], [-113.75, -27.15], [-114.0, -27.25], [-114.53, -27.03], [-114.68, -26.68], [-114.75, -26.65], [-115.0, -26.75]]]]}, "2026-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.0, -26.75], [-115.53, -26.53], [-115.75, -26.0], [-115.53, -25.47], [-115.0, -25.25], [-114.75, -25.35], [-114.5, -25.25], [-114.25, -25.35], [-114.0, -25.25], [-113.75, -25.35], [-113.5, -25.25], [-113.25, -25.35], [-113.0, -25.25], [-112.75, -25.35], [-112.5, -25.25], [-112.25, -25.35], [-112.0, -25.25], [-111.75, -25.35], [-111.5, -25.25], [-111.25, -25.35], [-111.0, -25.25], [-110.47, -25.47], [-110.32, -25.82], [-110.25, -25.85], [-110.0, -25.75], [-109.75, -25.85], [-109.5, -25.75], [-108.97, -25.97], [-108.82, -26.32], [-108.75, -26.35], [-108.5, -26.25], [-107.97, -26.47], [-107.82, -26.82], [-107.47, -26.97], [-107.32, -27.32], [-106.97, -27.47], [-106.75, -28.0], [-106.85, -28.25], [-106.75, -28.5], [-106.85, -28.75], [-106.75, -29.0], [-106.97, -29.53], [-107.5, -29.75], [-108.03, -29.53], [-108.18, -29.18], [-108.25, -29.15], [-108.5, -29.25], [-108.75, -29.15], [-109.0, -29.25], [-109.53, -29.03], [-109.68, -28.68], [-109.75, -28.65], [-110.0, -28.75], [-110.53, -28.53], [-110.68, -28.18], [-110.75, -28.15], [-111.0, -28.25], [-111.25, -28.15], [-111.5, -28.25], [-112.03, -28.03], [-112.18, -27.68], [-112.25, -27.65], [-112.5, -27.75], [-112.75, -27.65], [-113.0, -27.75], [-113.53, -27.53], [-113.68, -27.18], [-113.75, -27.15], [-114.0, -27.25], [-114.53, -27.03], [-114.68, -26.68], [-114.75, -26.65], [-115.0, -26.75]]]]}, "2026-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-115.0, -26.75], [-115.53, -26.53], [-115.75, -26.0], [-115.53, -25.47], [-115.0, -25.25], [-114.75, -25.35], [-114.5, -25.25], [-114.25, -25.35], [-114.0, -25.25], [-113.75, -25.35], [-113.5, -25.25], [-113.25, -25.35], [-113.0, -25.25], [-112.75, -25.35], [-112.5, -25.25], [-112.25, -25.35], [-112.0, -25.25], [-111.75, -25.35], [-111.5, -25.25], [-111.25, -25.35], [-111.0, -25.25], [-110.47, -25.47], [-110.32, -25.82], [-110.25, -25.85], [-110.0, -25.75], [-109.75, -25.85], [-109.5, -25.75], [-108.97, -25.97], [-108.82, -26.32], [-108.47, -26.47], [-108.32, -26.82], [-107.97, -26.97], [-107.75, -27.5], [-107.85, -27.75], [-107.82, -27.82], [-107.47, -27.97], [-107.32, -28.32], [-106.97, -28.47], [-106.75, -29.0], [-106.97, -29.53], [-107.5, -29.75], [-108.03, -29.53], [-108.18, -29.18], [-108.25, -29.15], [-108.5, -29.25], [-108.75, -29.15], [-109.0, -29.25], [-109.53, -29.03], [-109.69999999999999, -28.62], [-110.0, -28.75], [-110.53, -28.53], [-110.68, -28.18], [-110.75, -28.15], [-111.0, -28.25], [-111.25, -28.15], [-111.5, -28.25], [-112.03, -28.03], [-112.18, -27.68], [-112.25, -27.65], [-112.5, -27.75], [-112.75, -27.65], [-113.0, -27.75], [-113.53, -27.53], [-113.68, -27.18], [-113.75, -27.15], [-114.0, -27.25], [-114.53, -27.03], [-114.68, -26.68], [-114.75, -26.65], [-115.0, -26.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.4919014284150762}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.0829624744022728}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.147808098070584, 22.263274553087115, 22.264540184868736, 22.680155569409578]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.790989176432333, 21.726397450764978, 21.66775029500326, 21.81094131469729]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.0126375873602405, -1.1771772625799717, -1.2150243470994297, -0.8611974218530255]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.191109188525843, -1.4139299546795314, -1.4919014284150762, -1.1045705130513852]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2942877336018066, -1.6738744395886516, -1.7747111734484315, -1.2744993748114481]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5139964130524832, -2.1234002734221407, -2.2839771014838153, -1.6978102883701762]}}