{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:45.848940", "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-Feb-14_to_2011-Feb-17_47.5_-16.5"}, "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": 2011020000775}, "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 14 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 17 2011"}, "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": 56205.70057807935}, "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"]}, "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": ["Mozambique Channel"]}, "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": -16.5}, "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": 47.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "47.5\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": 48.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -18.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.97, -15.47], [46.5, -15.25], [46.75, -15.35], [46.82, -15.32], [46.97, -14.97], [47.5, -14.75], [48.03, -14.97], [48.18, -15.32], [48.25, -15.35], [48.5, -15.25], [49.03, -15.47], [49.25, -16.0], [49.03, -16.53], [48.68, -16.68], [48.53, -17.03], [48.18, -17.18], [48.15, -17.25], [48.25, -17.5], [48.15, -17.75], [48.25, -18.0], [48.03, -18.53], [47.5, -18.75], [47.25, -18.65], [47.0, -18.75], [46.47, -18.53], [46.25, -18.0], [46.35, -17.75], [46.25, -17.5], [46.35, -17.25], [46.32, -17.18], [45.97, -17.03], [45.75, -16.5], [45.85, -16.25], [45.75, -16.0], [45.97, -15.47]]]]}, "2011-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.75, -16.5], [45.85, -16.25], [45.75, -16.0], [45.97, -15.47], [46.5, -15.25], [46.75, -15.35], [46.82, -15.32], [46.97, -14.97], [47.5, -14.75], [48.03, -14.97], [48.18, -15.32], [48.25, -15.35], [48.5, -15.25], [49.03, -15.47], [49.25, -16.0], [49.03, -16.53], [48.68, -16.68], [48.53, -17.03], [48.18, -17.18], [48.15, -17.25], [48.25, -17.5], [48.15, -17.75], [48.25, -18.0], [48.03, -18.53], [47.5, -18.75], [47.25, -18.65], [47.0, -18.75], [46.75, -18.65], [46.5, -18.75], [46.25, -18.65], [46.0, -18.75], [45.47, -18.53], [45.25, -18.0], [45.47, -17.47], [45.82, -17.32], [45.96, -17.0], [45.75, -16.5]]]]}, "2011-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[45.75, -16.5], [45.85, -16.25], [45.75, -16.0], [45.97, -15.47], [46.5, -15.25], [46.75, -15.35], [46.82, -15.32], [46.97, -14.97], [47.5, -14.75], [48.03, -14.97], [48.18, -15.32], [48.25, -15.35], [48.5, -15.25], [49.03, -15.47], [49.25, -16.0], [49.03, -16.53], [48.68, -16.68], [48.53, -17.03], [48.18, -17.18], [48.15, -17.25], [48.25, -17.5], [48.15, -17.75], [48.25, -18.0], [48.03, -18.53], [47.5, -18.75], [47.25, -18.65], [47.0, -18.75], [46.75, -18.65], [46.5, -18.75], [46.25, -18.65], [46.0, -18.75], [45.47, -18.53], [45.25, -18.0], [45.47, -17.47], [45.82, -17.32], [45.96, -17.0], [45.75, -16.5]]]]}, "2011-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.32, -16.82], [46.38, -16.7], [45.97, -16.53], [45.75, -16.0], [45.97, -15.47], [46.5, -15.25], [46.75, -15.35], [46.82, -15.32], [46.97, -14.97], [47.5, -14.75], [48.03, -14.97], [48.18, -15.32], [48.25, -15.35], [48.5, -15.25], [49.03, -15.47], [49.25, -16.0], [49.03, -16.53], [48.68, -16.68], [48.53, -17.03], [48.18, -17.18], [48.15, -17.25], [48.25, -17.5], [48.15, -17.75], [48.25, -18.0], [48.03, -18.53], [47.5, -18.75], [47.25, -18.65], [47.0, -18.75], [46.75, -18.65], [46.5, -18.75], [46.25, -18.65], [46.0, -18.75], [45.47, -18.53], [45.25, -18.0], [45.47, -17.47], [45.82, -17.32], [45.97, -16.97], [46.32, -16.82]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.6294907547737694}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.096455712614044}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.840429452666513, 23.096158169296302, 23.268384278857695, 22.94249611756652]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.152776784802143, 20.30321744370167, 20.273767821431136, 20.02357634019512]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.584434526566003, -2.101958836284615, -1.8845563849656748, -1.8678596451050333]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6294907547737694, -2.686279919161791, -2.5816568759136658, -2.3460241796948935]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.435865421707063, -1.9597996096582342, -1.7115500761027365, -1.6494073808174996]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.2074770032072903, -2.287772866066791, -2.057431124297956, -1.8344145312686497]}}