{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:16.537805", "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": "2026-Jan-04_to_2026-Jan-07_316.5_-20.5"}, "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": 2026010000174}, "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 04 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 07 2026"}, "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": 98748.48976198956}, "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"]}, "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": -20.5}, "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": 316.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "316.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 313.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 317.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -22.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -16.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-46.53, -16.97], [-46.0, -16.75], [-45.75, -16.85], 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[-42.35, -22.25], [-42.25, -22.5], [-42.47, -23.03], [-43.0, -23.25], [-43.25, -23.15], [-43.5, -23.25], [-44.03, -23.03], [-44.18, -22.68], [-44.25, -22.65], [-44.5, -22.75], [-45.03, -22.53], [-45.25, -22.0], [-45.15, -21.75], [-45.25, -21.5], [-45.15, -21.25], [-45.18, -21.18], [-45.53, -21.03], [-45.75, -20.5], [-45.65, -20.25], [-45.68, -20.18], [-46.03, -20.03], [-46.25, -19.5], [-46.15, -19.25], [-46.25, -19.0], [-46.15, -18.75], [-46.18, -18.68], [-46.25, -18.65], [-46.5, -18.75], [-47.03, -18.53], [-47.25, -18.0], [-47.03, -17.47], [-46.68, -17.32], [-46.53, -16.97], [-46.0, -16.75]]]]}, "2026-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-46.0, -16.75], [-45.75, -16.85], [-45.68, -16.82], [-45.53, -16.47], [-45.0, -16.25], [-44.47, -16.47], [-44.25, -17.0], [-44.46, -17.5], [-44.25, -18.0], [-44.35, -18.25], [-44.32, -18.32], [-43.97, -18.47], [-43.82, -18.82], [-43.47, -18.97], [-43.25, -19.5], [-43.37, -19.8], [-42.97, -19.97], [-42.75, -20.5], 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{"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.1412268625135913}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.190215471055808, 20.333481388465998, 19.55710716995543, 20.713182190925863]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.407473500569665, 17.321319834391318, 17.01830317179366, 18.30998001098635]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.189261021140194, -3.0963459321826776, -3.8939118030629647, -2.641302869769493]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.337346165778115, -4.668441747498491, -4.817145712433387, -3.120993414345662]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2866855745640915, -1.9051532196443859, -2.3947702468323193, -1.6379321287700948]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3597843563053453, -2.634188929028562, -3.3036809401264966, -1.8803750852689445]}}