{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:09.446110", "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": "2011-Dec-29_to_2012-Jan-01_305.5_-17.5"}, "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": 2011120001446}, "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 29 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2012"}, "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": 144116.47264640025}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["South-American-Monsoon"]}, "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": -17.5}, "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": 305.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "305.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 303.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 308.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -19.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.03, -18.03], [-55.25, -17.5], [-55.03, -16.97], [-54.5, -16.75], [-54.25, -16.85], [-54.0, -16.75], [-53.75, -16.85], [-53.5, -16.75], [-52.97, -16.97], [-52.82, -17.32], [-52.47, -17.47], [-52.25, -18.0], [-52.47, -18.53], [-53.0, -18.75], [-53.53, -18.53], [-53.68, -18.18], [-53.75, -18.15], [-54.0, -18.25], [-54.25, -18.15], [-54.5, -18.25], [-55.03, -18.03]]]]}, "2011-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.03, -16.97], [-56.5, -16.75], [-56.25, -16.85], [-56.0, -16.75], [-55.7, -16.88], [-55.53, -16.47], [-55.0, -16.25], [-54.75, -16.35], [-54.68, -16.32], [-54.53, -15.97], [-54.18, -15.82], [-54.03, -15.47], [-53.5, -15.25], [-53.25, -15.35], [-53.0, -15.25], [-52.47, -15.47], [-52.25, -16.0], [-52.35, -16.25], [-52.32, -16.32], [-51.97, -16.47], [-51.82, -16.82], [-51.75, -16.85], [-51.5, -16.75], [-50.97, -16.97], [-50.75, -17.5], [-50.97, -18.03], [-51.32, -18.18], [-51.35, -18.25], [-51.25, -18.5], [-51.47, -19.03], [-51.82, -19.18], [-51.97, -19.53], [-52.5, -19.75], [-52.75, -19.65], [-52.82, -19.68], [-52.97, -20.03], [-53.5, -20.25], [-53.75, -20.15], [-54.0, -20.25], [-54.53, -20.03], [-54.68, -19.68], [-54.75, -19.65], [-55.0, -19.75], [-55.25, -19.65], [-55.5, -19.75], [-56.03, -19.53], [-56.18, -19.18], [-56.53, -19.03], [-56.68, -18.68], [-57.03, -18.53], [-57.25, -18.0], [-57.15, -17.75], [-57.25, -17.5], [-57.03, -16.97]]]]}, "2011-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.03, -16.97], [-56.5, -16.75], [-56.25, -16.85], [-56.0, -16.75], [-55.7, -16.88], [-55.53, -16.47], [-55.0, -16.25], [-54.75, -16.35], [-54.68, -16.32], [-54.53, -15.97], [-54.18, -15.82], [-54.03, -15.47], [-53.5, -15.25], [-53.25, -15.35], [-53.0, -15.25], [-52.47, -15.47], [-52.25, -16.0], [-52.35, -16.25], [-52.32, -16.32], [-51.97, -16.47], [-51.82, -16.82], [-51.75, -16.85], [-51.5, -16.75], [-50.97, -16.97], [-50.75, -17.5], [-50.97, -18.03], [-51.32, -18.18], [-51.35, -18.25], [-51.25, -18.5], [-51.47, -19.03], [-51.82, -19.18], [-51.97, -19.53], [-52.5, -19.75], [-52.75, -19.65], [-52.82, -19.68], [-52.97, -20.03], [-53.5, -20.25], [-53.75, -20.15], [-54.0, -20.25], [-54.53, -20.03], [-54.68, -19.68], [-54.75, -19.65], [-55.0, -19.75], [-55.25, -19.65], [-55.5, -19.75], [-56.03, -19.53], [-56.18, -19.18], [-56.53, -19.03], [-56.68, -18.68], [-57.03, -18.53], [-57.25, -18.0], [-57.15, -17.75], [-57.25, -17.5], [-57.03, -16.97]]]]}, "2012-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.03, -16.97], [-56.5, -16.75], [-56.25, -16.85], [-56.0, -16.75], [-55.7, -16.88], [-55.53, -16.47], [-55.0, -16.25], [-54.75, -16.35], [-54.68, -16.32], [-54.53, -15.97], [-54.18, -15.82], [-54.03, -15.47], [-53.5, -15.25], [-53.25, -15.35], [-53.0, -15.25], [-52.47, -15.47], [-52.25, -16.0], [-52.35, -16.25], [-52.32, -16.32], [-51.97, -16.47], [-51.82, -16.82], [-51.75, -16.85], [-51.5, -16.75], [-50.97, -16.97], [-50.75, -17.5], [-50.97, -18.03], [-51.32, -18.18], [-51.35, -18.25], [-51.25, -18.5], [-51.47, -19.03], [-51.82, -19.18], [-51.97, -19.53], [-52.5, -19.75], [-52.75, -19.65], [-52.82, -19.68], [-52.97, -20.03], [-53.5, -20.25], [-53.75, -20.15], [-54.0, -20.25], [-54.53, -20.03], [-54.68, -19.68], [-54.75, -19.65], [-55.0, -19.75], [-55.25, -19.65], [-55.5, -19.75], [-56.03, -19.53], [-56.18, -19.18], [-56.53, -19.03], [-56.68, -18.68], [-57.03, -18.53], [-57.25, -18.0], [-57.15, -17.75], [-57.25, -17.5], [-57.03, -16.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.9914960776899306}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.014167236703613}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.893422572910424, 23.620194010236787, 23.21036025599591, 23.124042952148557]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.055261683112178, 21.535364920698726, 21.52974328970737, 21.125731167978017]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4313651919599835, -1.7633429728700754, -2.121034081955126, -2.2057003324075666]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.4619278624668368, -2.205374946571169, -2.9914960776899306, -2.8807715377828913]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4309089102440067, -1.6373258230882335, -1.97616099618265, -1.9074324014014596]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5018862262634203, -1.9207551418944828, -2.5433191373864052, -2.363573962948704]}}