{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:23.368386", "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-Sep-19_to_2011-Sep-23_305.0_2.5"}, "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": 2011090000856}, "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": "September 19 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 23 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 141979.80422446888}, "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", "Suriname"]}, "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": 2.5}, "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": 305.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "305.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 302.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 306.25}, "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": 5.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-56.25, 1.0], [-56.03, 1.53], [-55.5, 1.75], [-55.25, 1.65], [-55.0, 1.75], [-54.75, 1.65], [-54.5, 1.75], [-53.97, 1.53], [-53.75, 1.0], [-53.97, 0.47], [-54.32, 0.32], [-54.47, -0.03], [-55.0, -0.25], [-55.53, -0.03], [-55.68, 0.32], [-56.03, 0.47], [-56.25, 1.0]]]]}, "2011-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.53, 4.03], [-57.18, 4.18], [-57.15, 4.25], [-57.25, 4.5], [-57.15, 4.75], [-57.25, 5.0], [-57.03, 5.53], [-56.5, 5.75], [-56.25, 5.65], [-56.0, 5.75], [-55.75, 5.65], [-55.5, 5.75], [-54.97, 5.53], [-54.82, 5.18], [-54.47, 5.03], [-54.32, 4.68], [-53.97, 4.53], [-53.82, 4.18], [-53.47, 4.03], [-53.25, 3.5], [-53.46, 3.0], [-53.25, 2.5], [-53.47, 1.97], [-53.82, 1.82], [-53.85, 1.75], [-53.75, 1.5], [-53.85, 1.25], [-53.75, 1.0], [-53.97, 0.47], [-54.32, 0.32], [-54.47, -0.03], [-54.82, -0.18], [-54.97, -0.53], [-55.5, -0.75], [-56.03, -0.53], [-56.25, 0.0], [-56.15, 0.25], [-56.25, 0.5], [-56.15, 0.75], [-56.2, 0.88], [-56.5, 0.75], [-57.03, 0.97], [-57.25, 1.5], [-57.15, 1.75], [-57.25, 2.0], [-57.15, 2.25], [-57.18, 2.32], [-57.53, 2.47], [-57.75, 3.0], [-57.65, 3.25], [-57.75, 3.5], [-57.53, 4.03]]]]}, "2011-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.53, 4.03], [-57.18, 4.18], [-57.15, 4.25], [-57.25, 4.5], [-57.15, 4.75], [-57.25, 5.0], [-57.03, 5.53], [-56.5, 5.75], [-56.25, 5.65], [-56.0, 5.75], [-55.75, 5.65], [-55.5, 5.75], [-54.97, 5.53], [-54.82, 5.18], [-54.47, 5.03], [-54.32, 4.68], [-53.97, 4.53], [-53.82, 4.18], [-53.47, 4.03], [-53.25, 3.5], [-53.46, 3.0], [-53.25, 2.5], [-53.47, 1.97], [-53.82, 1.82], [-53.85, 1.75], [-53.75, 1.5], [-53.85, 1.25], [-53.75, 1.0], [-53.97, 0.47], [-54.32, 0.32], [-54.47, -0.03], [-54.82, -0.18], [-54.97, -0.53], [-55.5, -0.75], [-56.03, -0.53], [-56.25, 0.0], [-56.15, 0.25], [-56.25, 0.5], [-56.15, 0.75], [-56.2, 0.88], [-56.5, 0.75], [-57.03, 0.97], [-57.25, 1.5], [-57.15, 1.75], [-57.25, 2.0], [-57.15, 2.25], [-57.18, 2.32], [-57.53, 2.47], [-57.75, 3.0], [-57.65, 3.25], [-57.75, 3.5], [-57.53, 4.03]]]]}, "2011-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.53, 4.03], [-57.18, 4.18], [-57.15, 4.25], [-57.25, 4.5], [-57.15, 4.75], [-57.25, 5.0], [-57.03, 5.53], [-56.5, 5.75], [-56.25, 5.65], [-56.0, 5.75], [-55.75, 5.65], [-55.5, 5.75], [-54.97, 5.53], [-54.82, 5.18], [-54.47, 5.03], [-54.32, 4.68], [-53.97, 4.53], [-53.82, 4.18], [-53.47, 4.03], [-53.25, 3.5], [-53.46, 3.0], [-53.25, 2.5], [-53.47, 1.97], [-53.82, 1.82], [-53.85, 1.75], [-53.75, 1.5], [-53.85, 1.25], [-53.75, 1.0], [-53.97, 0.47], [-54.32, 0.32], [-54.47, -0.03], [-54.82, -0.18], [-54.97, -0.53], [-55.5, -0.75], [-56.03, -0.53], [-56.25, 0.0], [-56.15, 0.25], [-56.25, 0.5], [-56.15, 0.75], [-56.2, 0.88], [-56.5, 0.75], [-57.03, 0.97], [-57.25, 1.5], [-57.15, 1.75], [-57.25, 2.0], [-57.15, 2.25], [-57.18, 2.32], [-57.53, 2.47], [-57.75, 3.0], [-57.65, 3.25], [-57.75, 3.5], [-57.53, 4.03]]]]}, "2011-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.03, 4.03], [-56.5, 4.25], [-56.2, 4.12], [-56.15, 4.25], [-56.18, 4.32], [-56.53, 4.47], [-56.75, 5.0], [-56.53, 5.53], [-56.0, 5.75], [-55.47, 5.53], [-55.32, 5.18], [-54.97, 5.03], [-54.75, 4.5], [-54.85, 4.25], [-54.75, 4.0], [-54.87, 3.7], [-54.47, 3.53], [-54.32, 3.18], [-53.97, 3.03], [-53.75, 2.5], [-53.97, 1.97], [-54.32, 1.82], [-54.47, 1.47], [-55.0, 1.25], [-55.53, 1.47], [-55.75, 2.0], [-55.65, 2.25], [-55.68, 2.32], [-56.0, 2.46], [-56.5, 2.25], [-57.03, 2.47], [-57.25, 3.0], [-57.15, 3.25], [-57.25, 3.5], [-57.03, 4.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.871287720528528}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9049160586081448}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.303082673031213, 24.988284338375706, 25.075499684314707, 25.246645194216626, 25.655204980009216]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.16214102029852, 23.401215146623485, 23.738107739467296, 24.02557055836695, 24.637038079924594]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5423044481640318, -2.0138961208478365, -1.9864217208843402, -1.8560910445962677, -1.3983214344673456]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8383617928106446, -2.871287720528528, -2.6092889312279226, -2.263428637360505, -2.0112249564830904]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5940516621294332, -2.011449239352804, -1.993044399567053, -1.8169873652068054, -1.3731432451290804]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8691258020100756, -3.0853817124035747, -2.5249846684466877, -2.4131517052107574, -1.61081718065479]}}