{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:32.149817", "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-Jan-17_to_2011-Jan-20_304.0_-16.5"}, "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": 2011010000852}, "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 17 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 20 2011"}, "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": 58760.37952985636}, "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": -16.5}, "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": 304.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "304.0\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": 306.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.25}, "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": {"2011-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.15, -17.25], [-57.25, -17.0], [-57.15, -16.75], 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[-55.25, -16.5], [-55.35, -16.75], [-55.25, -17.0], [-55.35, -17.25], [-55.32, -17.32], [-55.25, -17.35], [-55.0, -17.25], [-54.47, -17.47], [-54.25, -18.0], [-54.35, -18.25], [-54.25, -18.5], [-54.35, -18.75], [-54.3, -18.88], [-54.0, -18.75], [-53.47, -18.97], [-53.25, -19.5], [-53.47, -20.03], [-53.82, -20.18], [-53.97, -20.53], [-54.5, -20.75], [-55.03, -20.53], [-55.18, -20.18], [-55.53, -20.03], [-55.68, -19.68], [-55.75, -19.65], [-56.0, -19.75], [-56.53, -19.53], [-56.75, -19.0], [-56.65, -18.75], [-56.68, -18.68], [-57.03, -18.53], [-57.25, -18.0], [-57.15, -17.75], [-57.25, -17.5], [-57.15, -17.25]]]]}, "2011-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.15, -17.25], [-57.25, -17.0], [-57.15, -16.75], [-57.25, -16.5], [-57.03, -15.97], [-56.68, -15.82], [-56.53, -15.47], [-56.0, -15.25], [-55.47, -15.47], [-55.25, -16.0], [-55.35, -16.25], [-55.25, -16.5], [-55.35, -16.75], [-55.25, -17.0], [-55.35, -17.25], [-55.32, -17.32], [-55.25, -17.35], [-55.0, -17.25], [-54.47, -17.47], [-54.25, -18.0], [-54.35, -18.25], [-54.25, -18.5], [-54.35, -18.75], [-54.3, -18.88], [-54.0, -18.75], [-53.47, -18.97], [-53.25, -19.5], [-53.47, -20.03], [-53.82, -20.18], [-53.97, -20.53], [-54.5, -20.75], [-55.03, -20.53], [-55.18, -20.18], [-55.53, -20.03], [-55.68, -19.68], [-55.75, -19.65], [-56.0, -19.75], [-56.53, -19.53], [-56.75, -19.0], [-56.65, -18.75], [-56.68, -18.68], [-57.03, -18.53], [-57.25, -18.0], [-57.15, -17.75], [-57.25, -17.5], [-57.15, -17.25]]]]}, "2011-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.47, -18.97], [-53.25, -19.5], [-53.47, -20.03], [-53.82, -20.18], [-53.97, -20.53], [-54.5, -20.75], [-55.03, -20.53], [-55.25, -20.0], [-55.03, -19.47], [-54.68, -19.32], [-54.53, -18.97], [-54.0, -18.75], [-53.47, -18.97]]], [[[-56.0, -15.25], [-55.47, -15.47], [-55.25, -16.0], [-55.35, -16.25], [-55.25, -16.5], [-55.47, -17.03], [-56.0, -17.25], [-56.53, -17.03], [-56.75, -16.5], [-56.65, -16.25], [-56.75, -16.0], [-56.53, -15.47], [-56.0, -15.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.2767980262591436}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.3454896096263855}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.43475189739496, 24.776716296395193, 25.16745345125696, 24.730925166230918]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.15794274213414, 23.47683554439169, 23.488596033581814, 23.746782958112647]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.753193848026704, -2.3663868507612533, -2.0271200062979604, -1.8962562881926601]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.2767980262591436, -2.9108328952001443, -2.2691044908049776, -2.054995464438889]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.842955523108372, -1.5801578772530074, -1.3921354713023473, -1.41051660862418]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.136619393496657, -1.8033531970384584, -1.5819651310413758, -1.4719647195110184]}}