{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:52.545012", "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": "2023-Jan-20_to_2023-Jan-25_312.0_-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": 2023010000944}, "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 20 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 25 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 210066.39782756002}, "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", "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": 312.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "312.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 305.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 313.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -14.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.53, -15.47], [-48.0, -15.25], [-47.5, -15.46], [-47.0, -15.25], [-46.47, -15.47], [-46.25, -16.0], [-46.35, -16.25], [-46.25, -16.5], [-46.47, -17.03], [-46.82, -17.18], [-46.85, -17.25], [-46.75, -17.5], [-46.97, -18.03], [-47.32, -18.18], [-47.47, -18.53], [-48.0, -18.75], [-48.53, -18.53], [-48.75, -18.0], [-48.53, -17.47], [-48.18, -17.32], [-48.15, -17.25], [-48.18, -17.18], [-48.53, -17.03], [-48.75, -16.5], [-48.65, -16.25], [-48.75, -16.0], [-48.53, -15.47]]]]}, "2023-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.5, -16.25], [-52.25, -16.35], [-52.0, -16.25], [-51.75, -16.35], [-51.5, -16.25], [-50.97, -16.47], [-50.75, -17.0], [-50.85, -17.25], [-50.75, -17.5], [-50.97, -18.03], [-51.5, -18.25], [-51.75, -18.15], [-52.0, -18.25], [-52.25, -18.15], [-52.5, -18.25], [-53.03, -18.03], [-53.25, -17.5], [-53.15, -17.25], [-53.25, -17.0], [-53.03, -16.47], [-52.5, -16.25]]], [[[-50.18, -17.32], [-50.15, -17.25], [-50.25, -17.0], [-50.15, -16.75], [-50.18, -16.68], [-50.53, -16.53], [-50.75, -16.0], [-50.53, -15.47], [-50.18, -15.32], [-50.03, -14.97], [-49.5, -14.75], [-48.97, -14.97], [-48.82, -15.32], [-48.75, -15.35], [-48.5, -15.25], [-48.25, -15.35], [-48.0, -15.25], [-47.5, -15.46], [-47.0, -15.25], [-46.47, -15.47], [-46.25, -16.0], [-46.35, -16.25], [-46.25, -16.5], [-46.47, -17.03], [-46.82, -17.18], [-46.85, -17.25], [-46.75, -17.5], [-46.97, -18.03], [-47.32, -18.18], [-47.47, -18.53], [-48.0, -18.75], [-48.25, -18.65], [-48.32, -18.68], [-48.47, -19.03], [-49.0, -19.25], [-49.5, -19.04], [-50.0, -19.25], [-50.53, -19.03], [-50.75, -18.5], [-50.65, -18.25], [-50.75, -18.0], [-50.53, -17.47], [-50.18, -17.32]]]]}, "2023-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.75, -15.5], [-54.53, -14.97], [-54.18, -14.82], [-54.03, -14.47], [-53.5, -14.25], [-53.25, -14.35], [-53.0, -14.25], [-52.47, -14.47], [-52.32, -14.82], [-52.25, -14.85], [-52.0, -14.75], [-51.75, -14.85], [-51.5, -14.75], [-51.25, -14.85], [-51.0, -14.75], [-50.75, -14.85], [-50.5, -14.75], [-50.0, -14.96], [-49.5, -14.75], [-48.97, -14.97], [-48.82, -15.32], [-48.75, -15.35], [-48.5, -15.25], [-48.25, -15.35], [-48.0, -15.25], [-47.5, -15.46], [-47.0, -15.25], [-46.47, -15.47], [-46.25, -16.0], [-46.35, -16.25], [-46.25, -16.5], [-46.47, -17.03], [-46.82, -17.18], [-46.85, -17.25], [-46.75, -17.5], [-46.97, -18.03], [-47.32, -18.18], [-47.47, -18.53], [-48.0, -18.75], [-48.25, -18.65], [-48.32, -18.68], [-48.47, -19.03], [-49.0, -19.25], [-49.5, -19.04], [-50.0, -19.25], [-50.53, -19.03], [-50.75, -18.5], [-50.97, -19.03], [-51.5, -19.25], [-51.75, -19.15], [-52.0, -19.25], [-52.25, -19.15], [-52.5, -19.25], [-52.75, -19.15], [-53.0, -19.25], [-53.53, -19.03], [-53.68, -18.68], [-54.03, -18.53], [-54.25, -18.0], [-54.15, -17.75], [-54.25, -17.5], [-54.03, -16.97], [-53.68, -16.82], [-53.65, -16.75], [-53.68, -16.68], [-54.03, -16.53], [-54.18, -16.18], [-54.53, -16.03], [-54.75, -15.5]], [[-50.65, -18.25], [-50.75, -18.0], [-50.85, -18.25], [-50.75, -18.5], [-50.65, -18.25]], [[-50.53, -17.47], [-50.18, -17.32], [-50.15, -17.25], [-50.18, -17.18], [-50.25, -17.15], [-50.5, -17.25], [-50.75, -17.15], [-50.82, -17.18], [-50.85, -17.25], [-50.75, -17.5], [-50.85, -17.75], [-50.75, -18.0], [-50.53, -17.47]]]]}, "2023-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.75, -15.5], [-54.53, -14.97], [-54.18, -14.82], [-54.03, -14.47], [-53.5, -14.25], [-53.25, -14.35], [-53.0, -14.25], [-52.47, -14.47], [-52.32, -14.82], [-52.25, -14.85], [-52.0, -14.75], [-51.75, -14.85], [-51.5, -14.75], [-51.25, -14.85], [-51.0, -14.75], [-50.75, -14.85], [-50.5, -14.75], [-50.0, -14.96], [-49.5, -14.75], [-48.97, -14.97], [-48.82, -15.32], [-48.75, -15.35], [-48.5, -15.25], [-47.97, -15.47], [-47.82, -15.82], [-47.47, -15.97], [-47.32, -16.32], [-46.97, -16.47], [-46.75, -17.0], [-46.85, -17.25], [-46.75, -17.5], [-46.97, -18.03], [-47.32, -18.18], [-47.47, -18.53], [-48.0, -18.75], [-48.25, -18.65], [-48.32, -18.68], [-48.47, -19.03], [-49.0, -19.25], [-49.5, -19.04], [-50.0, -19.25], [-50.53, -19.03], [-50.75, -18.5], [-50.97, -19.03], [-51.5, -19.25], [-51.75, -19.15], [-52.0, -19.25], [-52.25, -19.15], [-52.5, -19.25], [-52.75, -19.15], [-53.0, -19.25], [-53.53, -19.03], [-53.68, -18.68], [-54.03, -18.53], [-54.25, -18.0], [-54.15, -17.75], [-54.25, -17.5], [-54.03, -16.97], [-53.68, -16.82], [-53.65, -16.75], [-53.68, -16.68], [-54.03, -16.53], [-54.18, -16.18], [-54.53, -16.03], [-54.75, -15.5]], [[-50.65, -18.25], [-50.75, -18.0], [-50.85, -18.25], [-50.75, -18.5], [-50.65, -18.25]], [[-50.53, -17.47], [-50.18, -17.32], [-50.15, -17.25], [-50.18, -17.18], [-50.25, -17.15], [-50.5, -17.25], [-50.75, -17.15], [-50.82, -17.18], [-50.85, -17.25], [-50.75, -17.5], [-50.85, -17.75], [-50.75, -18.0], [-50.53, -17.47]]]]}, "2023-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.75, -15.5], [-54.53, -14.97], [-54.18, -14.82], [-54.03, -14.47], [-53.5, -14.25], [-53.25, -14.35], [-53.0, -14.25], [-52.47, -14.47], [-52.32, -14.82], [-52.25, -14.85], [-52.0, -14.75], [-51.75, -14.85], [-51.5, -14.75], [-51.25, -14.85], [-51.0, -14.75], [-50.75, -14.85], [-50.5, -14.75], [-49.97, -14.97], [-49.82, -15.32], [-49.47, -15.47], [-49.25, -16.0], [-49.35, -16.25], [-49.3, -16.38], [-49.0, -16.25], [-48.5, -16.46], [-48.0, -16.25], [-47.47, -16.47], [-47.25, -17.0], [-47.35, -17.25], [-47.25, -17.5], [-47.47, -18.03], [-48.0, -18.25], [-48.53, -18.03], [-48.7, -17.62], [-49.0, -17.75], [-49.43, -17.57], [-49.25, -18.0], [-49.35, -18.25], [-49.25, -18.5], [-49.47, -19.03], [-50.0, -19.25], [-50.53, -19.03], [-50.75, -18.5], [-50.97, -19.03], [-51.5, -19.25], [-51.75, -19.15], [-52.0, -19.25], [-52.25, -19.15], [-52.5, -19.25], [-52.75, -19.15], [-53.0, -19.25], [-53.53, -19.03], [-53.68, -18.68], [-54.03, -18.53], [-54.25, -18.0], [-54.15, -17.75], [-54.25, -17.5], [-54.03, -16.97], [-53.68, -16.82], [-53.65, -16.75], [-53.68, -16.68], [-54.03, -16.53], [-54.18, -16.18], [-54.53, -16.03], [-54.75, -15.5]], [[-50.65, -18.25], [-50.75, -18.0], [-50.85, -18.25], [-50.75, -18.5], [-50.65, -18.25]], [[-50.53, -17.47], [-50.0, -17.25], [-50.25, -17.15], [-50.5, -17.25], [-50.75, -17.15], [-50.82, -17.18], [-50.96, -17.5], [-50.75, -18.0], [-50.53, -17.47]], [[-49.57, -17.43], [-49.7, -17.12], [-50.0, -17.25], [-49.57, -17.43]]]]}, "2023-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.53, -18.03], [-48.75, -17.5], [-48.53, -16.97], [-48.0, -16.75], [-47.47, -16.97], [-47.25, -17.5], [-47.47, -18.03], [-48.0, -18.25], [-48.53, -18.03]]], [[[-54.53, -16.03], [-54.75, -15.5], [-54.53, -14.97], [-54.0, -14.75], [-53.47, -14.97], [-53.25, -15.5], [-53.47, -16.03], [-54.0, -16.25], [-54.53, -16.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.635762610612801}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.055430043590086}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.48059819577861, 21.63073406985052, 22.41863064747116, 22.53916494697563, 22.954941006192144, 22.447054757777494]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.953823010445205, 20.444462994237085, 20.768013304998192, 20.98335425133422, 21.60631254453841, 22.083913902661664]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.017249308954078, -2.3229086492026534, -2.055119399302049, -2.0104484619500798, -1.9319581977846811, -1.8233047717013164]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.357379564979624, -3.635762610612801, -2.717402566031069, -2.536065893365617, -2.4730061785030557, -1.867708225141655]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4222084013042908, -1.6680701666261506, -1.5490592964639491, -1.522356469292344, -1.476820298303927, -1.4240518826052058]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6247385651371131, -2.2422395983918637, -1.929939425083445, -2.1052460741749157, -1.8623178880519073, -1.5494456249956468]}}