{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:57.973599", "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-Mar-20_to_2011-Mar-24_310.0_-20.0"}, "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": 2011030001031}, "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": "March 20 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 24 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": 302703.9132207406}, "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": ["N.E.South-America", "S.E.South-America", "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": -20.0}, "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": 310.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "310.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 306.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 313.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.65, -18.75], [-53.75, -18.5], [-53.65, -18.25], [-53.75, -18.0], [-53.53, -17.47], [-53.18, -17.32], [-53.03, -16.97], [-52.5, -16.75], [-52.25, -16.85], [-52.0, -16.75], [-51.75, -16.85], [-51.5, -16.75], [-50.97, -16.97], [-50.82, -17.32], [-50.75, -17.35], [-50.5, -17.25], [-50.25, -17.35], [-50.0, -17.25], [-49.47, -17.47], [-49.25, -18.0], [-49.35, -18.25], [-49.3, -18.38], [-49.18, -18.32], [-49.03, -17.97], [-48.5, -17.75], [-48.25, -17.85], [-48.0, -17.75], [-47.47, -17.97], [-47.25, -18.5], [-47.35, -18.75], [-47.25, -19.0], [-47.35, -19.25], [-47.25, -19.5], [-47.35, -19.75], [-47.32, -19.82], [-46.97, -19.97], [-46.75, -20.5], [-46.97, -21.03], [-47.32, -21.18], [-47.47, -21.53], [-48.0, -21.75], [-48.25, -21.65], [-48.5, -21.75], [-48.75, -21.65], [-49.0, -21.75], [-49.25, -21.65], [-49.5, -21.75], [-49.75, -21.65], [-50.0, -21.75], [-50.25, -21.65], [-50.5, -21.75], [-50.75, -21.65], [-51.0, -21.75], [-51.53, -21.53], [-51.68, -21.18], [-51.75, -21.15], [-52.0, -21.25], [-52.53, -21.03], [-52.68, -20.68], [-53.03, -20.53], [-53.18, -20.18], [-53.53, -20.03], [-53.75, -19.5], [-53.65, -19.25], [-53.75, -19.0], [-53.65, -18.75]]]]}, "2011-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.65, -18.75], [-53.75, -18.5], [-53.65, -18.25], [-53.75, -18.0], [-53.53, -17.47], [-53.18, -17.32], [-53.03, -16.97], [-52.68, -16.82], [-52.65, -16.75], [-52.68, -16.68], [-53.03, -16.53], [-53.25, -16.0], [-53.15, -15.75], [-53.25, -15.5], [-53.03, -14.97], [-52.5, -14.75], [-52.25, -14.85], [-52.0, -14.75], [-51.47, -14.97], [-51.25, -15.5], [-51.35, -15.75], [-51.25, -16.0], [-51.35, -16.25], [-51.32, -16.32], [-51.25, -16.35], [-51.0, -16.25], [-50.75, -16.35], [-50.5, -16.25], [-49.97, -16.47], [-49.82, -16.82], [-49.47, -16.97], [-49.25, -17.5], [-49.35, -17.75], [-49.32, -17.82], [-49.0, -17.96], [-48.5, -17.75], [-48.25, -17.85], [-48.0, -17.75], [-47.47, -17.97], [-47.25, -18.5], [-47.35, -18.75], [-47.25, -19.0], [-47.35, -19.25], [-47.25, -19.5], [-47.35, -19.75], [-47.32, -19.82], [-47.25, -19.85], [-47.0, -19.75], [-46.75, -19.85], [-46.5, -19.75], [-45.97, -19.97], [-45.75, -20.5], [-45.97, -21.03], [-46.5, -21.25], [-46.75, -21.15], [-47.0, -21.25], [-47.25, -21.15], [-47.32, -21.18], [-47.47, -21.53], [-48.0, -21.75], [-48.25, -21.65], [-48.5, -21.75], [-48.75, -21.65], [-48.82, -21.68], [-48.85, -21.75], [-48.75, -22.0], [-48.97, -22.53], [-49.5, -22.75], [-49.75, -22.65], [-50.0, -22.75], [-50.25, -22.65], [-50.5, -22.75], [-50.75, -22.65], [-50.82, -22.68], [-50.85, -22.75], [-50.75, -23.0], [-50.97, -23.53], [-51.5, -23.75], [-52.03, -23.53], [-52.18, -23.18], [-52.25, -23.15], [-52.5, -23.25], [-53.03, -23.03], [-53.18, -22.68], [-53.53, -22.53], [-53.75, -22.0], [-53.53, -21.47], [-53.18, -21.32], [-53.03, -20.97], [-52.68, -20.82], [-52.65, -20.75], [-52.68, -20.68], [-53.03, -20.53], [-53.18, -20.18], [-53.53, -20.03], [-53.75, -19.5], [-53.65, -19.25], [-53.75, -19.0], [-53.65, -18.75]]]]}, "2011-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.65, -18.75], [-53.75, -18.5], [-53.65, -18.25], [-53.75, -18.0], [-53.53, -17.47], [-53.18, -17.32], [-53.03, -16.97], [-52.68, -16.82], [-52.65, -16.75], [-52.68, -16.68], [-53.03, -16.53], [-53.25, -16.0], [-53.15, -15.75], [-53.25, -15.5], [-53.03, -14.97], [-52.5, -14.75], [-52.25, -14.85], [-52.0, -14.75], [-51.47, -14.97], [-51.25, -15.5], [-51.35, -15.75], [-51.25, -16.0], [-51.35, -16.25], [-51.32, -16.32], [-51.25, -16.35], [-51.0, -16.25], [-50.75, -16.35], [-50.5, -16.25], [-49.97, -16.47], [-49.82, -16.82], [-49.47, -16.97], [-49.25, -17.5], [-49.35, -17.75], [-49.32, -17.82], [-49.0, -17.96], [-48.5, -17.75], [-48.25, -17.85], [-48.0, -17.75], [-47.47, -17.97], [-47.25, -18.5], [-47.35, -18.75], [-47.25, -19.0], [-47.35, -19.25], [-47.25, -19.5], [-47.35, -19.75], [-47.32, -19.82], [-47.25, -19.85], [-47.0, -19.75], [-46.75, -19.85], [-46.5, -19.75], [-45.97, -19.97], [-45.75, -20.5], [-45.97, -21.03], [-46.5, -21.25], [-46.75, -21.15], [-47.0, -21.25], [-47.25, -21.15], [-47.32, -21.18], [-47.47, -21.53], [-48.0, -21.75], [-48.25, -21.65], [-48.5, -21.75], [-48.75, -21.65], [-48.82, -21.68], [-48.85, -21.75], [-48.75, -22.0], [-48.97, -22.53], [-49.5, -22.75], [-49.75, -22.65], [-50.0, -22.75], [-50.25, -22.65], [-50.5, -22.75], [-50.75, -22.65], [-50.82, -22.68], [-50.85, -22.75], [-50.75, -23.0], [-50.97, -23.53], [-51.5, -23.75], [-52.03, -23.53], [-52.18, -23.18], [-52.25, -23.15], [-52.5, -23.25], [-53.03, -23.03], [-53.18, -22.68], [-53.53, -22.53], [-53.75, -22.0], [-53.53, -21.47], [-53.18, -21.32], [-53.03, -20.97], [-52.68, -20.82], [-52.65, -20.75], [-52.68, -20.68], [-53.03, -20.53], [-53.18, -20.18], [-53.53, -20.03], [-53.75, -19.5], [-53.65, -19.25], [-53.75, -19.0], [-53.65, -18.75]]]]}, "2011-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-47.75, -20.5], [-47.53, -19.97], [-47.0, -19.75], [-46.75, -19.85], [-46.5, -19.75], [-45.97, -19.97], [-45.75, -20.5], [-45.97, -21.03], [-46.5, -21.25], [-46.75, -21.15], [-47.0, -21.25], [-47.53, -21.03], [-47.75, -20.5]]], [[[-53.53, -21.47], [-53.18, -21.32], [-53.03, -20.97], [-52.68, -20.82], [-52.53, -20.47], [-52.18, -20.32], [-52.15, -20.25], [-52.25, -20.0], [-52.15, -19.75], [-52.18, -19.68], [-52.53, -19.53], [-52.75, -19.0], [-52.53, -18.47], [-52.0, -18.25], [-51.75, -18.35], [-51.68, -18.32], [-51.65, -18.25], [-51.68, -18.18], [-52.03, -18.03], [-52.18, -17.68], [-52.53, -17.53], [-52.75, -17.0], [-52.65, -16.75], [-52.68, -16.68], [-53.03, -16.53], [-53.25, -16.0], [-53.15, -15.75], [-53.25, -15.5], [-53.03, -14.97], [-52.5, -14.75], [-52.25, -14.85], [-52.0, -14.75], [-51.47, -14.97], [-51.25, -15.5], [-51.35, -15.75], [-51.25, -16.0], [-51.35, -16.25], [-51.32, -16.32], [-51.25, -16.35], [-51.0, -16.25], [-50.75, -16.35], [-50.5, -16.25], [-49.97, -16.47], [-49.82, -16.82], [-49.47, -16.97], [-49.25, -17.5], [-49.35, -17.75], [-49.32, -17.82], [-48.97, -17.97], [-48.75, -18.5], [-48.85, -18.75], [-48.82, -18.82], [-48.47, -18.97], [-48.32, -19.32], [-47.97, -19.47], [-47.75, -20.0], [-47.97, -20.53], [-48.5, -20.75], [-48.75, -20.65], [-48.82, -20.68], [-48.85, -20.75], [-48.75, -21.0], [-48.85, -21.25], [-48.75, -21.5], [-48.85, -21.75], [-48.75, -22.0], [-48.97, -22.53], [-49.5, -22.75], [-49.75, -22.65], [-50.0, -22.75], [-50.25, -22.65], [-50.5, -22.75], [-50.75, -22.65], [-50.82, -22.68], [-50.85, -22.75], [-50.75, -23.0], [-50.97, -23.53], [-51.5, -23.75], [-52.03, -23.53], [-52.18, -23.18], [-52.25, -23.15], [-52.5, -23.25], [-53.03, -23.03], [-53.18, -22.68], [-53.53, -22.53], [-53.75, -22.0], [-53.53, -21.47]]]]}, "2011-03-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.75, -19.0], [-52.53, -18.47], [-52.0, -18.25], [-51.7, -18.38], [-51.65, -18.25], [-51.68, -18.18], [-52.03, -18.03], [-52.25, -17.5], [-52.03, -16.97], [-51.5, -16.75], [-50.97, -16.97], [-50.82, -17.32], [-50.75, -17.35], [-50.5, -17.25], [-50.25, -17.35], [-50.0, -17.25], [-49.47, -17.47], [-49.32, -17.82], [-48.97, -17.97], [-48.75, -18.5], [-48.87, -18.8], [-48.47, -18.97], [-48.32, -19.32], [-47.97, -19.47], [-47.75, -20.0], [-47.97, -20.53], [-48.5, -20.75], [-48.75, -20.65], [-49.0, -20.75], [-49.5, -20.54], [-50.0, -20.75], [-50.25, -20.65], [-50.5, -20.75], [-51.03, -20.53], [-51.18, -20.18], [-51.53, -20.03], [-51.7, -19.62], [-52.0, -19.75], [-52.53, -19.53], [-52.75, -19.0]]], [[[-53.03, -16.03], [-53.25, -15.5], [-53.03, -14.97], [-52.5, -14.75], [-51.97, -14.97], [-51.75, -15.5], [-51.97, -16.03], [-52.5, -16.25], [-53.03, -16.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.5615980622208667}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.3668597512783323}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.432214303951866, 22.10081650722765, 22.14831461754426, 22.900625640290627, 23.23883382760829]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.763779651371294, 19.666790766959537, 20.62437530493986, 20.843470185673766, 21.410318692114913]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.1857903306103372, -2.611118921213552, -2.5725654586921722, -2.0540486872038075, -1.6749091673752774]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.0153857794691703, -3.5615980622208667, -3.5320752443982997, -2.891526194435073, -2.0893675251117543]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7686111294991267, -2.056934277389626, -2.0589535885917014, -1.627565391475322, -1.4141362446750234]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3639749023774765, -2.696716126664233, -2.552832576106361, -2.3368814751709364, -1.7475478953197625]}}