{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:22:35.541822", "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": "2020-Dec-30_to_2021-Jan-08_282.5_-9.0"}, "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": 2020120001144}, "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": "December 30 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 08 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 10}, "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": 107022.80387984776}, "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": ["Peru"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.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": ["South Pacific Ocean"]}, "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": -9.0}, "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": 282.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "282.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 281.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 285.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -10.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -6.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.5, -9.25], [-77.97, -9.47], [-77.75, -10.0], [-77.97, -10.53], [-78.5, -10.75], [-79.03, -10.53], [-79.25, -10.0], [-79.03, -9.47], [-78.5, -9.25]]]]}, "2020-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.5, -9.25], [-77.97, -9.47], [-77.75, -10.0], [-77.97, -10.53], [-78.5, -10.75], [-79.03, -10.53], [-79.25, -10.0], [-79.03, -9.47], [-78.5, -9.25]]]]}, "2021-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.5, -9.25], [-77.97, -9.47], [-77.75, -10.0], [-77.97, -10.53], [-78.5, -10.75], [-79.03, -10.53], [-79.25, -10.0], [-79.03, -9.47], [-78.5, -9.25]]]]}, "2021-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.5, -9.25], [-77.97, -9.47], [-77.75, -10.0], [-77.97, -10.53], [-78.5, -10.75], [-79.03, -10.53], [-79.25, -10.0], [-79.03, -9.47], [-78.5, -9.25]]]]}, "2021-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.5, -9.25], [-77.97, -9.47], [-77.75, -10.0], [-77.97, -10.53], [-78.5, -10.75], [-79.03, -10.53], [-79.25, -10.0], [-79.03, -9.47], [-78.5, -9.25]]]]}, "2021-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.0, -8.75], [-77.47, -8.97], [-77.25, -9.5], [-77.47, -10.03], [-78.0, -10.25], [-78.53, -10.03], [-78.75, -9.5], [-78.53, -8.97], [-78.0, -8.75]]]]}, "2021-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.15, -7.25], [-79.25, -7.0], [-79.03, -6.47], [-78.5, -6.25], [-77.97, -6.47], [-77.75, -7.0], [-77.53, -6.47], [-77.0, -6.25], [-76.75, -6.35], [-76.5, -6.25], [-76.0, -6.46], [-75.5, -6.25], [-74.97, -6.47], [-74.8, -6.88], [-74.5, -6.75], [-73.97, -6.97], [-73.75, -7.5], [-73.97, -8.03], [-74.32, -8.18], [-74.35, -8.25], [-74.25, -8.5], [-74.35, -8.75], [-74.25, -9.0], [-74.35, -9.25], [-74.25, -9.5], [-74.47, -10.03], [-75.0, -10.25], [-75.25, -10.15], [-75.5, -10.25], [-76.03, -10.03], [-76.18, -9.68], [-76.53, -9.53], [-76.68, -9.18], [-76.75, -9.15], [-76.82, -9.18], [-76.97, -9.53], [-77.32, -9.68], [-77.47, -10.03], [-78.0, -10.25], [-78.53, -10.03], [-78.75, -9.5], [-78.53, -8.97], [-78.18, -8.82], [-78.15, -8.75], [-78.18, -8.68], [-78.25, -8.65], [-78.5, -8.75], [-79.03, -8.53], [-79.25, -8.0], [-79.15, -7.75], [-79.25, -7.5], [-79.15, -7.25]], [[-77.85, -7.25], [-77.82, -7.32], [-77.7, -7.38], [-77.65, -7.25], [-77.75, -7.0], [-77.85, -7.25]]]]}, "2021-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.15, -7.25], [-79.25, -7.0], [-79.03, -6.47], [-78.5, -6.25], [-77.97, -6.47], [-77.75, -7.0], [-77.53, -6.47], [-77.0, -6.25], [-76.75, -6.35], [-76.5, -6.25], [-76.0, -6.46], [-75.5, -6.25], [-74.97, -6.47], [-74.8, -6.88], [-74.5, -6.75], [-73.97, -6.97], [-73.75, -7.5], [-73.97, -8.03], [-74.32, -8.18], [-74.35, -8.25], [-74.25, -8.5], [-74.35, -8.75], [-74.25, -9.0], [-74.35, -9.25], [-74.25, -9.5], [-74.47, -10.03], [-75.0, -10.25], [-75.25, -10.15], [-75.5, -10.25], [-75.75, -10.15], [-75.82, -10.18], [-75.97, -10.53], [-76.5, -10.75], [-77.03, -10.53], [-77.18, -10.18], [-77.5, -10.04], [-78.0, -10.25], [-78.53, -10.03], [-78.75, -9.5], [-78.53, -8.97], [-78.18, -8.82], [-78.15, -8.75], [-78.18, -8.68], [-78.25, -8.65], [-78.5, -8.75], [-79.03, -8.53], [-79.25, -8.0], [-79.15, -7.75], [-79.25, -7.5], [-79.15, -7.25]], [[-77.85, -7.25], [-77.82, -7.32], [-77.75, -7.35], [-77.68, -7.32], [-77.65, -7.25], [-77.75, -7.0], [-77.85, -7.25]]]]}, "2021-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.15, -7.25], [-79.25, -7.0], [-79.03, -6.47], [-78.5, -6.25], [-77.97, -6.47], [-77.75, -7.0], [-77.53, -6.47], [-77.0, -6.25], [-76.75, -6.35], [-76.5, -6.25], [-76.0, -6.46], [-75.5, -6.25], [-74.97, -6.47], [-74.8, -6.88], [-74.5, -6.75], [-73.97, -6.97], [-73.75, -7.5], [-73.97, -8.03], [-74.32, -8.18], [-74.35, -8.25], [-74.25, -8.5], [-74.35, -8.75], [-74.25, -9.0], [-74.35, -9.25], [-74.25, -9.5], [-74.47, -10.03], [-75.0, -10.25], [-75.25, -10.15], [-75.5, -10.25], [-75.75, -10.15], [-75.82, -10.18], [-75.97, -10.53], [-76.5, -10.75], [-77.03, -10.53], [-77.18, -10.18], [-77.53, -10.03], [-77.68, -9.68], [-78.03, -9.53], [-78.25, -9.0], [-78.15, -8.75], [-78.18, -8.68], [-78.25, -8.65], [-78.5, -8.75], [-79.03, -8.53], [-79.25, -8.0], [-79.15, -7.75], [-79.25, -7.5], [-79.15, -7.25]], [[-77.85, -7.25], [-77.82, -7.32], [-77.75, -7.35], [-77.68, -7.32], [-77.65, -7.25], [-77.75, -7.0], [-77.85, -7.25]]]]}, "2021-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.15, -7.25], [-79.25, -7.0], [-79.03, -6.47], [-78.5, -6.25], [-77.97, -6.47], [-77.75, -7.0], [-77.85, -7.25], [-77.82, -7.32], [-77.75, -7.35], [-77.5, -7.25], [-77.25, -7.35], [-77.0, -7.25], [-76.75, -7.35], [-76.5, -7.25], [-75.97, -7.47], [-75.75, -8.0], [-75.97, -8.53], [-76.32, -8.68], [-76.35, -8.75], [-76.3, -8.88], [-76.0, -8.75], [-75.47, -8.97], [-75.25, -9.5], [-75.47, -10.03], [-75.82, -10.18], [-75.97, -10.53], [-76.5, -10.75], [-77.03, -10.53], [-77.18, -10.18], [-77.53, -10.03], [-77.68, -9.68], [-78.03, -9.53], [-78.25, -9.0], [-78.15, -8.75], [-78.18, -8.68], [-78.25, -8.65], [-78.5, -8.75], [-79.03, -8.53], [-79.25, -8.0], [-79.15, -7.75], [-79.25, -7.5], [-79.15, -7.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.461573263393177}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5989139037981623}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.328241695017766, 18.0302510071038, 18.062267132728152, 18.361607398381636, 18.486424303080355, 15.157537489570018, 18.688382598686132, 16.914071886651527, 17.002006682293654, 10.202962372367153]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.328241695017766, 18.0302510071038, 18.062267132728152, 18.361607398381636, 18.486424303080355, 15.157537489570018, 5.606531419107284, 4.723381251719388, 4.654466898932185, 5.555723434734716]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.485937138304564, -1.8482451191324003, -1.8864393497693186, -1.6587021659726702, -1.6015181456042455, -1.3097828382598777, -1.4460425544568198, -1.7040354015565125, -1.6716200598948576, -1.4639012161073512]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.485937138304564, -1.8482451191324003, -1.8864393497693186, -1.6587021659726702, -1.6015181456042455, -1.3097828382598777, -1.9345759469573522, -2.461573263393177, -2.2516308398228375, -2.030932287939379]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1899121766490384, -1.4642437249254416, -1.4817575630851025, -1.2886759453618273, -1.2301106991748778, -1.291695425829404, -1.4973902824594862, -1.813688980091613, -1.76674075883897, -1.5777272138569198]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.1899121766490384, -1.4642437249254416, -1.4817575630851025, -1.2886759453618273, -1.2301106991748778, -1.291695425829404, -1.9293759372667594, -2.625302162952273, -2.473633202610228, -2.1324574137107515]}}