{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:07.832905", "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": "2015-Jun-04_to_2015-Jun-06_142.5_43.5"}, "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": 2015060000192}, "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": "June 04 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 06 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 73951.84619699765}, "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": ["Japan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": ["Japan Sea"]}, "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": 43.5}, "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": 142.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "142.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 138.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 143.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 42.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-06-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.97, 44.03], [138.32, 44.18], [138.47, 44.53], [138.82, 44.68], [138.97, 45.03], [139.5, 45.25], [139.75, 45.15], [140.0, 45.25], [140.53, 45.03], [140.68, 44.68], [140.75, 44.65], [141.0, 44.75], [141.25, 44.65], [141.32, 44.68], [141.47, 45.03], [142.0, 45.25], [142.53, 45.03], [142.68, 44.68], [142.75, 44.65], [143.0, 44.75], [143.53, 44.53], [143.75, 44.0], [143.65, 43.75], [143.75, 43.5], [143.53, 42.97], [143.18, 42.82], [143.03, 42.47], [142.5, 42.25], [142.25, 42.35], [142.0, 42.25], [141.75, 42.35], [141.5, 42.25], [141.25, 42.35], [141.0, 42.25], [140.75, 42.35], [140.5, 42.25], [140.25, 42.35], [140.18, 42.32], [140.03, 41.97], [139.5, 41.75], [139.25, 41.85], [139.0, 41.75], [138.47, 41.97], [138.32, 42.32], [137.97, 42.47], [137.75, 43.0], [137.85, 43.25], [137.75, 43.5], [137.97, 44.03]]]]}, "2015-06-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.97, 44.03], [138.32, 44.18], [138.47, 44.53], [138.82, 44.68], [138.97, 45.03], [139.5, 45.25], [139.75, 45.15], [140.0, 45.25], [140.53, 45.03], [140.68, 44.68], [140.75, 44.65], [141.0, 44.75], [141.25, 44.65], [141.32, 44.68], [141.47, 45.03], [142.0, 45.25], [142.53, 45.03], [142.68, 44.68], [142.75, 44.65], [143.0, 44.75], [143.53, 44.53], [143.75, 44.0], [143.65, 43.75], [143.75, 43.5], [143.53, 42.97], [143.18, 42.82], [143.03, 42.47], [142.5, 42.25], [142.25, 42.35], [142.0, 42.25], [141.75, 42.35], [141.5, 42.25], [141.25, 42.35], [141.0, 42.25], [140.75, 42.35], [140.5, 42.25], [140.25, 42.35], [140.18, 42.32], [140.03, 41.97], [139.5, 41.75], [139.25, 41.85], [139.0, 41.75], [138.47, 41.97], [138.32, 42.32], [137.97, 42.47], [137.75, 43.0], [137.85, 43.25], [137.75, 43.5], [137.97, 44.03]]]]}, "2015-06-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.97, 44.03], [138.32, 44.18], [138.47, 44.53], [138.82, 44.68], [138.97, 45.03], [139.5, 45.25], [139.75, 45.15], [140.0, 45.25], [140.53, 45.03], [140.68, 44.68], [140.75, 44.65], [141.0, 44.75], [141.25, 44.65], [141.32, 44.68], [141.47, 45.03], [142.0, 45.25], [142.53, 45.03], [142.68, 44.68], [142.75, 44.65], [143.0, 44.75], [143.53, 44.53], [143.75, 44.0], [143.65, 43.75], [143.75, 43.5], [143.53, 42.97], [143.18, 42.82], [143.03, 42.47], [142.5, 42.25], [142.25, 42.35], [142.0, 42.25], [141.75, 42.35], [141.5, 42.25], [141.25, 42.35], [141.0, 42.25], [140.75, 42.35], [140.5, 42.25], [140.25, 42.35], [140.18, 42.32], [140.03, 41.97], [139.5, 41.75], [139.25, 41.85], [139.0, 41.75], [138.47, 41.97], [138.32, 42.32], [137.97, 42.47], [137.75, 43.0], [137.85, 43.25], [137.75, 43.5], [137.97, 44.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.388788213483906}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.484050974223671}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.290931660922809, 9.16478000715415, 9.269644656530375]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.327372835813719, 4.60846716277581, 5.2255511103321055]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2354488283094103, -3.550666861091491, -3.666037233270112]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.422066019770455, -6.807207346886287, -7.388788213483906]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6539024797422914, -1.7814995778498062, -1.971755332956036]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9711715743421516, -2.2943955545926404, -2.251416712410337]}}