{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:15.306427", "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-May-06_to_2013-May-08_137.5_39.0"}, "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": 2013050000301}, "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": "May 06 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 08 2013"}, "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": 81422.26545291125}, "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": 39.0}, "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": 137.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "137.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 135.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 140.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.32, 38.18], [136.46, 38.5], [136.25, 39.0], [136.47, 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38.5], [136.25, 39.0], [136.47, 39.53], [136.82, 39.68], [136.85, 39.75], [136.75, 40.0], [136.85, 40.25], [136.75, 40.5], [136.85, 40.75], [136.75, 41.0], [136.97, 41.53], [137.5, 41.75], [137.75, 41.65], [138.0, 41.75], [138.25, 41.65], [138.5, 41.75], [139.03, 41.53], [139.18, 41.18], [139.5, 41.04], [140.0, 41.25], [140.25, 41.15], [140.5, 41.25], [141.03, 41.03], [141.25, 40.5], [141.15, 40.25], [141.25, 40.0], [141.03, 39.47], [140.5, 39.25], [140.25, 39.35], [140.18, 39.32], [140.15, 39.25], [140.25, 39.0], [140.15, 38.75], [140.25, 38.5], [140.03, 37.97], [139.5, 37.75], [139.25, 37.85], [139.0, 37.75], [138.75, 37.85], [138.68, 37.82], [138.53, 37.47], [138.18, 37.32], [138.03, 36.97], [137.5, 36.75], [137.25, 36.85], [137.0, 36.75], [136.75, 36.85], [136.68, 36.82], [136.53, 36.47], [136.0, 36.25], [135.47, 36.47], [135.25, 37.0], [135.47, 37.53], [135.82, 37.68], [135.97, 38.03], [136.32, 38.18]]]]}, "2013-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.32, 38.18], [136.46, 38.5], [136.25, 39.0], [136.47, 39.53], [136.82, 39.68], [136.85, 39.75], [136.75, 40.0], [136.85, 40.25], [136.75, 40.5], [136.85, 40.75], [136.75, 41.0], [136.97, 41.53], [137.5, 41.75], [137.75, 41.65], [138.0, 41.75], [138.25, 41.65], [138.5, 41.75], [139.03, 41.53], [139.18, 41.18], [139.5, 41.04], [140.0, 41.25], [140.25, 41.15], [140.5, 41.25], [141.03, 41.03], [141.25, 40.5], [141.15, 40.25], [141.25, 40.0], [141.03, 39.47], [140.5, 39.25], [140.25, 39.35], [140.18, 39.32], [140.15, 39.25], [140.25, 39.0], [140.15, 38.75], [140.25, 38.5], [140.03, 37.97], [139.5, 37.75], [139.25, 37.85], [139.0, 37.75], [138.75, 37.85], [138.68, 37.82], [138.53, 37.47], [138.18, 37.32], [138.03, 36.97], [137.5, 36.75], [137.25, 36.85], [137.0, 36.75], [136.75, 36.85], [136.68, 36.82], [136.53, 36.47], [136.0, 36.25], [135.47, 36.47], [135.25, 37.0], [135.47, 37.53], [135.82, 37.68], [135.97, 38.03], [136.32, 38.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.066471992688264}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.44788535173003}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.281344555535327, 7.378514861350652, 9.7422804273657]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.966917709703239, 3.989715824790096, 7.014772836867792]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9397249331786584, -4.874187475715306, -2.529743646296125]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.05010957766757, -8.066471992688264, -4.435591375844524]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7381483677365186, -2.946244328475818, -1.58351933727689]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.293712087269409, -3.3485245801308827, -2.150728745627046]}}