{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:36.775327", "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": "2013-Feb-10_to_2013-Feb-18_49.5_-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": 2013020000412}, "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": "February 10 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 18 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 190698.950685269}, "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": ["Madagascar"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar", "S.Indian-Ocean"]}, "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": ["Indian 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": -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": 49.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "49.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 45.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 53.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -18.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[49.5, -19.75], [50.03, -19.97], [50.25, -20.5], [50.03, -21.03], [49.5, -21.25], [48.97, -21.03], [48.75, -20.5], [48.97, -19.97], [49.5, -19.75]]]]}, "2013-02-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[49.5, -19.75], [50.03, -19.97], [50.25, -20.5], [50.03, -21.03], [49.5, -21.25], [48.97, -21.03], [48.75, -20.5], [48.97, -19.97], [49.5, -19.75]]]]}, "2013-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.97, -18.97], [49.5, -18.75], [49.75, -18.85], [50.0, -18.75], [50.5, -18.96], [51.0, -18.75], [51.25, -18.85], [51.5, -18.75], [52.03, -18.97], [52.18, -19.32], [52.25, -19.35], [52.5, -19.25], [52.75, -19.35], [53.0, -19.25], [53.25, -19.35], [53.5, -19.25], [54.03, -19.47], [54.25, -20.0], [54.15, -20.25], [54.25, -20.5], [54.03, -21.03], [53.5, -21.25], [53.25, -21.15], [53.0, -21.25], [52.75, -21.15], [52.5, -21.25], [52.25, -21.15], [52.18, -21.18], [52.03, -21.53], [51.5, -21.75], [51.25, -21.65], [51.0, -21.75], [50.75, -21.65], [50.5, -21.75], [49.97, -21.53], [49.82, -21.18], [49.75, -21.15], [49.5, -21.25], [48.97, -21.03], [48.75, -20.5], [48.96, -20.0], [48.75, -19.5], [48.97, -18.97]]]]}, "2013-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[48.75, -20.0], [48.85, -19.75], [48.75, -19.5], [48.85, -19.25], [48.75, -19.0], [48.97, -18.47], [49.5, -18.25], [50.03, -18.47], [50.18, -18.82], [50.5, -18.96], [51.0, -18.75], [51.25, -18.85], [51.5, -18.75], [52.03, -18.97], [52.18, -19.32], [52.25, -19.35], [52.5, -19.25], [52.75, -19.35], [53.0, -19.25], [53.25, -19.35], [53.5, -19.25], [54.03, -19.47], [54.25, -20.0], [54.15, -20.25], [54.25, -20.5], [54.03, -21.03], [53.5, -21.25], [53.25, -21.15], [53.0, -21.25], [52.75, -21.15], [52.5, -21.25], [52.25, -21.15], [52.18, -21.18], [52.03, -21.53], [51.5, -21.75], [51.25, -21.65], [51.0, -21.75], [50.75, -21.65], [50.5, -21.75], [49.97, -21.53], [49.82, -21.18], [49.75, -21.15], [49.5, -21.25], [49.2, -21.12], [49.03, -21.53], [48.5, -21.75], [47.97, -21.53], [47.75, -21.0], [47.97, -20.47], [48.5, -20.25], [48.8, -20.37], [48.85, -20.25], [48.75, -20.0]]]]}, "2013-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.35, -22.75], [47.25, -22.5], [47.47, -21.97], [47.88, -21.8], [47.75, -21.5], [47.85, -21.25], [47.75, -21.0], [47.97, -20.47], [48.32, -20.32], [48.35, -20.25], [48.25, -20.0], [48.35, -19.75], [48.25, -19.5], [48.35, -19.25], [48.25, -19.0], [48.47, -18.47], [49.0, -18.25], [49.25, -18.35], [49.5, -18.25], [49.75, -18.35], [50.0, -18.25], [50.25, -18.35], [50.32, -18.32], [50.47, -17.97], [51.0, -17.75], [51.25, -17.85], [51.5, -17.75], [52.03, -17.97], [52.25, -18.5], [52.15, -18.75], [52.25, -19.0], [52.15, -19.25], [52.18, -19.32], [52.25, -19.35], [52.5, -19.25], [52.75, -19.35], [53.0, -19.25], [53.25, -19.35], [53.5, -19.25], [54.03, -19.47], [54.25, -20.0], [54.15, -20.25], [54.25, -20.5], [54.03, -21.03], [53.5, -21.25], [53.25, -21.15], [53.0, -21.25], [52.75, -21.15], [52.5, -21.25], [52.25, -21.15], [52.18, -21.18], [52.03, -21.53], [51.5, -21.75], [51.25, -21.65], [51.0, -21.75], [50.75, -21.65], [50.5, -21.75], [50.25, -21.65], [50.0, -21.75], [49.75, -21.65], [49.5, -21.75], [49.25, -21.65], [49.18, -21.68], [49.04, -22.0], [49.25, -22.5], [49.15, -22.75], [49.25, -23.0], [49.15, -23.25], [49.25, -23.5], [49.03, -24.03], [48.5, -24.25], [48.25, -24.15], [48.0, -24.25], [47.47, -24.03], [47.25, -23.5], [47.35, -23.25], [47.25, -23.0], [47.35, -22.75]]]]}, "2013-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.47, -21.47], [45.82, -21.32], [45.97, -20.97], [46.32, -20.82], [46.35, -20.75], [46.25, -20.5], [46.47, -19.97], [47.0, -19.75], [47.53, -19.97], [47.68, -20.32], [47.75, -20.35], [47.82, -20.32], [47.96, -20.0], [47.75, -19.5], [47.97, -18.97], [48.32, -18.82], [48.47, -18.47], [49.0, -18.25], [49.25, -18.35], [49.5, -18.25], [49.75, -18.35], [50.0, -18.25], [50.25, -18.35], [50.32, -18.32], [50.47, -17.97], [51.0, -17.75], [51.25, -17.85], [51.5, -17.75], [52.03, -17.97], [52.25, -18.5], [52.15, -18.75], [52.25, -19.0], [52.15, -19.25], [52.18, -19.32], [52.53, -19.47], [52.75, -20.0], [52.53, -20.53], [52.18, -20.68], [52.03, -21.03], [51.68, -21.18], [51.53, -21.53], [51.0, -21.75], [50.75, -21.65], [50.5, -21.75], [50.25, -21.65], [50.0, -21.75], [49.75, -21.65], [49.5, -21.75], [49.25, -21.65], [49.18, -21.68], [49.04, -22.0], [49.25, -22.5], [49.15, -22.75], [49.25, -23.0], [49.15, -23.25], [49.25, -23.5], [49.03, -24.03], [48.5, -24.25], [48.25, -24.15], [48.18, -24.18], [48.03, -24.53], [47.5, -24.75], [46.97, -24.53], [46.75, -24.0], [46.88, -23.7], [46.47, -23.53], [46.32, -23.18], [46.25, -23.15], [46.0, -23.25], [45.47, -23.03], [45.25, -22.5], [45.35, -22.25], [45.25, -22.0], [45.47, -21.47]]]]}, "2013-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.47, -21.47], [45.82, -21.32], [45.97, -20.97], [46.32, -20.82], [46.35, -20.75], [46.25, -20.5], [46.47, -19.97], [47.0, -19.75], [47.53, -19.97], [47.68, -20.32], [47.75, -20.35], [47.82, -20.32], [47.96, -20.0], [47.75, -19.5], [47.97, -18.97], [48.32, -18.82], [48.47, -18.47], [49.0, -18.25], [49.25, -18.35], [49.5, -18.25], [49.75, -18.35], [50.0, -18.25], [50.25, -18.35], [50.32, -18.32], [50.47, -17.97], [51.0, -17.75], [51.25, -17.85], [51.5, -17.75], [52.03, -17.97], [52.25, -18.5], [52.15, -18.75], [52.25, -19.0], [52.04, -19.5], [52.25, -20.0], [52.03, -20.53], [51.5, -20.75], [51.25, -20.65], [51.18, -20.68], [51.03, -21.03], [50.68, -21.18], [50.53, -21.53], [50.0, -21.75], [49.75, -21.65], [49.5, -21.75], [49.25, -21.65], [49.18, -21.68], [49.04, -22.0], [49.25, -22.5], [49.15, -22.75], [49.25, -23.0], [49.15, -23.25], [49.25, -23.5], [49.03, -24.03], [48.5, -24.25], [48.25, -24.15], [48.18, -24.18], [48.03, -24.53], [47.5, -24.75], [46.97, -24.53], [46.75, -24.0], [46.88, -23.7], [46.47, -23.53], [46.32, -23.18], [46.25, -23.15], [46.0, -23.25], [45.47, -23.03], [45.25, -22.5], [45.35, -22.25], [45.25, -22.0], [45.47, -21.47]]]]}, "2013-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.82, -21.32], [45.97, -20.97], [46.32, -20.82], [46.35, -20.75], [46.25, -20.5], [46.47, -19.97], [47.0, -19.75], [47.53, -19.97], [47.68, -20.32], [47.75, -20.35], [47.82, -20.32], [47.96, -20.0], [47.75, -19.5], [47.97, -18.97], [48.32, -18.82], [48.47, -18.47], [49.0, -18.25], [49.53, -18.47], [49.75, -19.0], [49.65, -19.25], [49.75, -19.5], [49.53, -20.03], [49.13, -20.2], [49.25, -20.5], [49.15, -20.75], [49.25, -21.0], [49.15, -21.25], [49.25, -21.5], [49.03, -22.03], [48.68, -22.18], [48.65, -22.25], [48.75, -22.5], [48.53, -23.03], [48.18, -23.18], [48.04, -23.5], [48.25, -24.0], [48.03, -24.53], [47.5, -24.75], [46.97, -24.53], [46.75, -24.0], [46.88, -23.7], [46.47, -23.53], [46.32, -23.18], [46.25, -23.15], [46.0, -23.25], [45.47, -23.03], [45.25, -22.5], [45.35, -22.25], [45.25, -22.0], [45.47, -21.47], [45.82, -21.32]]], [[[50.47, -19.03], [50.25, -18.5], [50.47, -17.97], [51.0, -17.75], [51.53, -17.97], [51.75, -18.5], [51.53, -19.03], [51.0, -19.25], [50.47, -19.03]]]]}, "2013-02-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.97, -22.03], [47.75, -21.5], [47.97, -20.97], [48.5, -20.75], [49.03, -20.97], [49.25, -21.5], [49.03, -22.03], [48.5, -22.25], [47.97, -22.03]]], [[[48.25, -19.0], [48.47, -18.47], [49.0, -18.25], [49.53, -18.47], [49.75, -19.0], [49.53, -19.53], [49.0, -19.75], [48.47, -19.53], [48.25, -19.0]]], [[[50.25, -18.5], [50.47, -17.97], [51.0, -17.75], [51.53, -17.97], [51.75, -18.5], [51.53, -19.03], [51.0, -19.25], [50.47, -19.03], [50.25, -18.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.2697839002412934}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2638037522031131}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.516967660074783, 25.451875172533903, 25.705393281904037, 25.745840328520444, 25.396180174970482, 24.458838905495725, 24.22136130038575, 22.850574374963514, 25.46327251555357]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.516967660074783, 25.451875172533903, 25.34506706604253, 24.965528825994454, 24.578131121506544, 18.685816738488427, 18.252471395736222, 18.236550942127224, 24.960289183034433]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.061471883702552, -1.1147131342969487, -1.0402163741459993, -0.9660194428910069, -1.2261475683818677, -1.271538656204494, -1.4026689660789968, -1.5968400977842048, -1.05758148543066]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.061471883702552, -1.1147131342969487, -1.2399931138467082, -1.1803715524418408, -1.4824164716056885, -1.9387925189886914, -2.2697839002412934, -2.2679102286631405, -1.3821559938386372]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4524939363106404, -1.4905602961305817, -1.5354703049480036, -1.3956925896988706, -1.7723764685338363, -1.5436783388302977, -1.5790678045200175, -1.5020896926210012, -1.2334773302036421]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4524939363106404, -1.4905602961305817, -2.0347789730942254, -1.5223205623349392, -2.2223184785908634, -1.9361491241961366, -2.0078018522988432, -1.8462927073948183, -1.290572951472619]}}