{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:34.144696", "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-24_to_2011-Jan-28_351.0_5.5"}, "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": 2011010001215}, "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 24 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 28 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 123259.58272399553}, "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": ["C\u00f4te d'Ivoire", "Liberia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Atlantic-Ocean", "Western-Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": ["Gulf of Guinea", "North Atlantic 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": 5.5}, "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": 351.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "351.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 348.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 354.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 1.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 7.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.75, 7.0], [-11.53, 7.53], [-11.0, 7.75], [-10.47, 7.53], [-10.32, 7.18], [-10.25, 7.15], [-10.18, 7.18], [-10.03, 7.53], [-9.5, 7.75], [-8.97, 7.53], [-8.82, 7.18], [-8.47, 7.03], [-8.25, 6.5], [-8.35, 6.25], [-8.32, 6.18], [-7.97, 6.03], [-7.75, 5.5], [-7.85, 5.25], [-7.82, 5.18], [-7.75, 5.15], [-7.5, 5.25], [-7.25, 5.15], [-7.0, 5.25], [-6.5, 5.04], [-6.0, 5.25], [-5.75, 5.15], [-5.5, 5.25], [-4.97, 5.03], [-4.75, 4.5], [-4.97, 3.97], [-5.32, 3.82], [-5.35, 3.75], [-5.25, 3.5], [-5.47, 2.97], [-5.82, 2.82], [-5.85, 2.75], [-5.75, 2.5], [-5.85, 2.25], [-5.75, 2.0], [-5.97, 1.47], [-6.5, 1.25], [-6.75, 1.35], [-7.0, 1.25], [-7.25, 1.35], [-7.5, 1.25], [-8.03, 1.47], [-8.18, 1.82], [-8.53, 1.97], [-8.68, 2.32], [-9.03, 2.47], [-9.25, 3.0], [-9.03, 3.53], [-8.68, 3.68], [-8.65, 3.75], [-8.75, 4.0], [-8.65, 4.25], [-8.68, 4.32], [-9.03, 4.47], [-9.18, 4.82], [-9.25, 4.85], [-9.5, 4.75], [-10.03, 4.97], [-10.18, 5.32], [-10.53, 5.47], [-10.68, 5.82], [-11.03, 5.97], [-11.18, 6.32], [-11.53, 6.47], [-11.75, 7.0]]]]}, "2011-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.75, 7.0], [-11.53, 7.53], [-11.0, 7.75], [-10.47, 7.53], [-10.32, 7.18], [-10.25, 7.15], [-10.18, 7.18], [-10.03, 7.53], [-9.5, 7.75], [-8.97, 7.53], [-8.82, 7.18], [-8.47, 7.03], [-8.25, 6.5], [-8.35, 6.25], [-8.32, 6.18], [-7.97, 6.03], [-7.75, 5.5], [-7.85, 5.25], [-7.82, 5.18], [-7.75, 5.15], [-7.5, 5.25], [-7.25, 5.15], [-7.0, 5.25], [-6.5, 5.04], [-6.0, 5.25], [-5.75, 5.15], [-5.5, 5.25], [-4.97, 5.03], [-4.75, 4.5], [-4.97, 3.97], [-5.32, 3.82], [-5.35, 3.75], [-5.25, 3.5], [-5.47, 2.97], [-5.82, 2.82], [-5.85, 2.75], [-5.75, 2.5], [-5.85, 2.25], [-5.75, 2.0], [-5.97, 1.47], [-6.5, 1.25], [-6.75, 1.35], [-7.0, 1.25], [-7.25, 1.35], [-7.5, 1.25], [-8.03, 1.47], [-8.18, 1.82], [-8.53, 1.97], [-8.68, 2.32], [-9.03, 2.47], [-9.25, 3.0], [-9.03, 3.53], [-8.68, 3.68], [-8.65, 3.75], [-8.75, 4.0], [-8.65, 4.25], [-8.68, 4.32], [-9.03, 4.47], [-9.18, 4.82], [-9.25, 4.85], [-9.5, 4.75], [-10.03, 4.97], [-10.18, 5.32], [-10.53, 5.47], [-10.68, 5.82], [-11.03, 5.97], [-11.18, 6.32], [-11.53, 6.47], [-11.75, 7.0]]]]}, "2011-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.75, 7.0], [-11.53, 7.53], [-11.0, 7.75], [-10.47, 7.53], [-10.32, 7.18], [-10.25, 7.15], [-10.18, 7.18], [-10.03, 7.53], [-9.5, 7.75], [-8.97, 7.53], [-8.82, 7.18], [-8.47, 7.03], [-8.25, 6.5], [-8.35, 6.25], [-8.32, 6.18], [-7.97, 6.03], [-7.75, 5.5], [-7.85, 5.25], [-7.82, 5.18], [-7.75, 5.15], [-7.5, 5.25], [-7.25, 5.15], [-7.0, 5.25], [-6.5, 5.04], [-6.0, 5.25], [-5.75, 5.15], [-5.5, 5.25], [-4.97, 5.03], [-4.75, 4.5], [-4.97, 3.97], [-5.32, 3.82], [-5.35, 3.75], [-5.25, 3.5], [-5.47, 2.97], [-5.82, 2.82], [-5.85, 2.75], [-5.75, 2.5], [-5.85, 2.25], [-5.75, 2.0], [-5.97, 1.47], [-6.5, 1.25], [-6.75, 1.35], [-7.0, 1.25], [-7.25, 1.35], [-7.5, 1.25], [-8.03, 1.47], [-8.18, 1.82], [-8.53, 1.97], [-8.68, 2.32], [-9.03, 2.47], [-9.25, 3.0], [-9.03, 3.53], [-8.68, 3.68], [-8.65, 3.75], [-8.75, 4.0], [-8.65, 4.25], [-8.68, 4.32], [-9.03, 4.47], [-9.18, 4.82], [-9.25, 4.85], [-9.5, 4.75], [-10.03, 4.97], [-10.18, 5.32], [-10.53, 5.47], [-10.68, 5.82], [-11.03, 5.97], [-11.18, 6.32], [-11.53, 6.47], [-11.75, 7.0]]]]}, "2011-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.75, 3.5], [-8.53, 4.03], [-8.0, 4.25], [-7.75, 4.15], [-7.5, 4.25], [-6.97, 4.03], [-6.82, 3.68], [-6.75, 3.65], [-6.5, 3.75], [-5.97, 3.53], [-5.75, 3.0], [-5.85, 2.75], [-5.75, 2.5], [-5.85, 2.25], [-5.75, 2.0], [-5.97, 1.47], [-6.5, 1.25], [-6.75, 1.35], [-7.0, 1.25], [-7.25, 1.35], [-7.5, 1.25], [-8.03, 1.47], [-8.18, 1.82], [-8.53, 1.97], [-8.75, 2.5], [-8.65, 2.75], [-8.75, 3.0], [-8.65, 3.25], [-8.75, 3.5]]], [[[-10.03, 6.53], [-9.5, 6.75], [-8.97, 6.53], [-8.82, 6.18], [-8.75, 6.15], [-8.5, 6.25], [-7.97, 6.03], [-7.75, 5.5], [-7.97, 4.97], [-8.5, 4.75], [-8.75, 4.85], [-9.0, 4.75], [-9.53, 4.97], [-9.68, 5.32], [-10.03, 5.47], [-10.25, 6.0], [-10.03, 6.53]]]]}, "2011-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.0, 6.25], [-8.47, 6.03], [-8.25, 5.5], [-8.47, 4.97], [-9.0, 4.75], [-9.53, 4.97], [-9.75, 5.5], [-9.53, 6.03], [-9.0, 6.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.7639219401581272}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.0704498309645187}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.240025186718412, 25.45843378610732, 25.474901869958728, 25.756913132309023, 24.779734595354967]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.671121544999664, 24.001842816153555, 23.98369223457138, 24.468387540496792, 24.779734595354967]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1998152903474946, -1.0354355970290627, -1.0606643486001643, -0.8697861613018283, -0.898438822240962]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7639219401581272, -1.3388338212692474, -1.7050693441611315, -0.9634945965876796, -0.898438822240962]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7916201217332155, -1.606326648321692, -1.6783092420302204, -1.4019111575067271, -1.2949173639401732]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.430497178472247, -2.0887614355051536, -2.221354426789568, -1.5849945241409065, -1.2949173639401732]}}