{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:23:18.007554", "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-Feb-28_to_2021-Mar-03_306.5_1.0"}, "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": 2021020001078}, "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": "February 28 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 03 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": 52521.72761933019}, "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": ["Brazil", "French Guiana"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["South 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": []}, "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": 1.0}, "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": 306.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "306.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 305.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 308.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 0.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 3.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.25, 1.5], [-55.03, 2.03], [-54.5, 2.25], [-54.25, 2.15], [-54.18, 2.18], [-54.15, 2.25], [-54.25, 2.5], [-54.03, 3.03], [-53.68, 3.18], [-53.53, 3.53], [-53.0, 3.75], [-52.47, 3.53], [-52.32, 3.18], [-51.97, 3.03], [-51.82, 2.68], [-51.47, 2.53], [-51.25, 2.0], [-51.35, 1.75], [-51.25, 1.5], [-51.47, 0.97], [-52.0, 0.75], [-52.25, 0.85], [-52.32, 0.82], [-52.47, 0.47], [-53.0, 0.25], [-53.25, 0.35], [-53.32, 0.32], [-53.47, -0.03], [-54.0, -0.25], [-54.53, -0.03], [-54.75, 0.5], [-54.65, 0.75], [-54.68, 0.82], [-55.03, 0.97], [-55.25, 1.5]]]]}, "2021-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.25, 1.5], [-55.03, 2.03], [-54.5, 2.25], [-54.25, 2.15], [-54.18, 2.18], [-54.15, 2.25], [-54.25, 2.5], [-54.03, 3.03], [-53.68, 3.18], [-53.53, 3.53], [-53.0, 3.75], [-52.47, 3.53], [-52.32, 3.18], [-51.97, 3.03], [-51.82, 2.68], [-51.47, 2.53], [-51.25, 2.0], [-51.35, 1.75], [-51.25, 1.5], [-51.47, 0.97], [-52.0, 0.75], [-52.25, 0.85], [-52.32, 0.82], [-52.47, 0.47], [-53.0, 0.25], [-53.25, 0.35], [-53.32, 0.32], [-53.47, -0.03], [-54.0, -0.25], [-54.53, -0.03], [-54.75, 0.5], [-54.65, 0.75], [-54.68, 0.82], [-55.03, 0.97], [-55.25, 1.5]]]]}, "2021-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.25, 1.5], [-55.03, 2.03], [-54.5, 2.25], [-54.25, 2.15], [-54.18, 2.18], [-54.15, 2.25], [-54.25, 2.5], [-54.03, 3.03], [-53.68, 3.18], [-53.53, 3.53], [-53.0, 3.75], [-52.47, 3.53], [-52.32, 3.18], [-51.97, 3.03], [-51.82, 2.68], [-51.47, 2.53], [-51.25, 2.0], [-51.35, 1.75], [-51.25, 1.5], [-51.47, 0.97], [-52.0, 0.75], [-52.25, 0.85], [-52.32, 0.82], [-52.47, 0.47], [-53.0, 0.25], [-53.25, 0.35], [-53.32, 0.32], [-53.47, -0.03], [-54.0, -0.25], [-54.53, -0.03], [-54.75, 0.5], [-54.65, 0.75], [-54.68, 0.82], [-55.03, 0.97], [-55.25, 1.5]]]]}, "2021-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.53, 1.53], [-54.18, 1.68], [-54.15, 1.75], [-54.25, 2.0], [-54.03, 2.53], [-53.5, 2.75], [-52.97, 2.53], [-52.75, 2.0], [-52.85, 1.75], [-52.75, 1.5], [-52.85, 1.25], [-52.75, 1.0], [-52.97, 0.47], [-53.32, 0.32], [-53.47, -0.03], [-54.0, -0.25], [-54.53, -0.03], [-54.75, 0.5], [-54.65, 0.75], [-54.75, 1.0], [-54.53, 1.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.1412162272331443}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5140068874485004}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.137149215886893, 23.12302583468977, 23.15488477432541, 23.339743119291597]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.2105067426711, 22.54951868795797, 22.158536365970008, 23.060110733448823]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5296530588009551, -1.5591155465714304, -1.551375519949418, -1.1803871133290726]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0923618847843386, -2.0079960085902258, -2.1412162272331443, -1.2509688310644265]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6855105706869242, -1.7201014679173303, -1.7294538395319057, -1.3346824524689318]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3471126685074313, -2.175082592996538, -2.40902533646771, -1.4200871853824746]}}