{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:24.261444", "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": "2012-Jan-27_to_2012-Feb-01_298.5_7.0"}, "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": 2012010001403}, "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 27 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 01 2012"}, "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": 144362.95958081644}, "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": ["Guyana", "Venezuela"]}, "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": 7.0}, "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": 298.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "298.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 293.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 299.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 4.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 8.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-63.5, 5.25], [-62.97, 5.03], [-62.75, 4.5], [-62.97, 3.97], 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7.25], [-64.75, 7.5], [-64.53, 8.03], [-64.18, 8.18], [-64.03, 8.53]]]]}, "2012-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.03, 7.53], [-64.68, 7.68], [-64.53, 8.03], [-64.18, 8.18], [-64.03, 8.53], [-63.5, 8.75], [-63.25, 8.65], [-63.0, 8.75], [-62.75, 8.65], [-62.5, 8.75], [-62.25, 8.65], [-62.0, 8.75], [-61.47, 8.53], [-61.32, 8.18], [-61.25, 8.15], [-61.0, 8.25], [-60.47, 8.03], [-60.25, 7.5], [-60.35, 7.25], [-60.25, 7.0], [-60.35, 6.75], [-60.25, 6.5], [-60.47, 5.97], [-61.0, 5.75], [-61.25, 5.85], [-61.5, 5.75], [-61.75, 5.85], [-62.0, 5.75], [-61.47, 5.53], [-61.25, 5.0], [-61.35, 4.75], [-61.25, 4.5], [-61.47, 3.97], [-62.0, 3.75], [-62.53, 3.97], [-62.68, 4.32], [-62.75, 4.35], [-62.82, 4.32], [-62.97, 3.97], [-63.5, 3.75], [-64.03, 3.97], [-64.25, 4.5], [-64.15, 4.75], [-64.2, 4.88], [-64.5, 4.75], [-65.03, 4.97], [-65.25, 5.5], [-65.04, 6.0], [-65.25, 6.5], [-65.15, 6.75], [-65.25, 7.0], [-65.03, 7.53]], [[-62.25, 5.85], [-62.5, 5.75], [-62.25, 5.65], [-62.0, 5.75], [-62.25, 5.85]], [[-62.75, 5.85], [-63.0, 5.75], [-62.75, 5.65], [-62.5, 5.75], [-62.75, 5.85]], [[-63.53, 5.97], [-63.7, 6.38], [-63.82, 6.32], [-63.96, 6.0], [-63.8, 5.62], [-63.5, 5.75], [-63.25, 5.65], [-63.0, 5.75], [-63.53, 5.97]]]]}, "2012-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.68, 7.18], [-65.53, 7.53], [-65.0, 7.75], [-64.75, 7.65], [-64.68, 7.68], [-64.53, 8.03], [-64.18, 8.18], [-64.03, 8.53], [-63.5, 8.75], [-63.25, 8.65], [-63.0, 8.75], [-62.75, 8.65], [-62.5, 8.75], [-62.25, 8.65], [-62.0, 8.75], [-61.47, 8.53], [-61.32, 8.18], [-61.25, 8.15], [-61.0, 8.25], [-60.47, 8.03], [-60.25, 7.5], [-60.35, 7.25], [-60.25, 7.0], [-60.35, 6.75], [-60.25, 6.5], [-60.47, 5.97], [-61.0, 5.75], [-61.25, 5.85], [-61.5, 5.75], [-61.75, 5.85], [-62.0, 5.75], [-61.47, 5.53], [-61.25, 5.0], [-61.35, 4.75], [-61.25, 4.5], [-61.47, 3.97], [-62.0, 3.75], [-62.53, 3.97], [-62.68, 4.32], [-62.75, 4.35], [-62.82, 4.32], [-62.97, 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duration", "value": -2.985071272058974}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.703678653458776}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.51988940295206, 23.54446044840978, 23.38320391727359, 22.829772922108077, 22.6169445799282, 22.77970526056538]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.51988940295206, 21.513747370835176, 20.865429176419127, 20.136263146204897, 20.05621644503043, 19.88859183844312]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.0434143340243622, -1.4367686162980218, -1.5177284503825017, -1.664936767785369, -1.907517204213371, -1.7931003553191602]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution 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