{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:53:57.781600", "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-Jul-31_to_2013-Aug-02_328.0_37.5"}, "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": 2013070001585}, "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": "July 31 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 02 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": 73169.45023544627}, "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": ["Azores"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Atlantic-Ocean"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": ["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": 37.5}, "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": 328.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "328.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 325.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 331.75}, "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": 39.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-34.0, 38.25], [-33.75, 38.15], [-33.68, 38.18], [-33.53, 38.53], [-33.0, 38.75], [-32.75, 38.65], [-32.68, 38.68], [-32.53, 39.03], [-32.0, 39.25], [-31.75, 39.15], [-31.5, 39.25], [-31.25, 39.15], [-31.0, 39.25], [-30.75, 39.15], [-30.5, 39.25], [-30.25, 39.15], [-30.0, 39.25], [-29.75, 39.15], [-29.68, 39.18], [-29.53, 39.53], [-29.0, 39.75], [-28.75, 39.65], [-28.5, 39.75], [-27.97, 39.53], [-27.75, 39.0], [-27.85, 38.75], [-27.75, 38.5], [-27.97, 37.97], [-28.5, 37.75], [-28.75, 37.85], [-28.82, 37.82], [-28.97, 37.47], [-29.5, 37.25], [-29.75, 37.35], [-30.0, 37.25], [-30.25, 37.35], [-30.5, 37.25], [-30.75, 37.35], [-30.82, 37.32], [-30.85, 37.25], [-30.75, 37.0], [-30.97, 36.47], [-31.5, 36.25], [-31.75, 36.35], [-32.0, 36.25], [-32.25, 36.35], [-32.5, 36.25], [-32.75, 36.35], [-33.0, 36.25], [-33.25, 36.35], [-33.5, 36.25], [-34.0, 36.46], [-34.5, 36.25], [-35.03, 36.47], [-35.25, 37.0], [-35.03, 37.53], [-34.68, 37.68], [-34.53, 38.03], [-34.0, 38.25]]]]}, "2013-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-34.0, 38.25], [-33.75, 38.15], [-33.68, 38.18], [-33.53, 38.53], [-33.0, 38.75], [-32.75, 38.65], [-32.68, 38.68], [-32.53, 39.03], [-32.0, 39.25], [-31.75, 39.15], [-31.5, 39.25], [-31.25, 39.15], [-31.0, 39.25], [-30.75, 39.15], [-30.5, 39.25], [-30.25, 39.15], [-30.0, 39.25], [-29.75, 39.15], [-29.68, 39.18], [-29.53, 39.53], [-29.0, 39.75], [-28.75, 39.65], [-28.5, 39.75], [-27.97, 39.53], [-27.75, 39.0], [-27.85, 38.75], [-27.75, 38.5], [-27.97, 37.97], [-28.5, 37.75], [-28.75, 37.85], [-28.82, 37.82], [-28.97, 37.47], [-29.5, 37.25], [-29.75, 37.35], [-30.0, 37.25], [-30.25, 37.35], [-30.5, 37.25], [-30.75, 37.35], [-30.82, 37.32], [-30.85, 37.25], [-30.75, 37.0], [-30.97, 36.47], [-31.5, 36.25], [-31.75, 36.35], [-32.0, 36.25], [-32.25, 36.35], [-32.5, 36.25], [-32.75, 36.35], [-33.0, 36.25], [-33.25, 36.35], [-33.5, 36.25], [-34.0, 36.46], [-34.5, 36.25], [-35.03, 36.47], [-35.25, 37.0], [-35.03, 37.53], [-34.68, 37.68], [-34.53, 38.03], [-34.0, 38.25]]]]}, "2013-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-34.0, 38.25], [-33.75, 38.15], [-33.68, 38.18], [-33.53, 38.53], [-33.0, 38.75], [-32.75, 38.65], [-32.68, 38.68], [-32.53, 39.03], [-32.0, 39.25], [-31.75, 39.15], [-31.5, 39.25], [-31.25, 39.15], [-31.0, 39.25], [-30.75, 39.15], [-30.5, 39.25], [-30.25, 39.15], [-30.0, 39.25], [-29.75, 39.15], [-29.68, 39.18], [-29.53, 39.53], [-29.0, 39.75], [-28.75, 39.65], [-28.5, 39.75], [-27.97, 39.53], [-27.75, 39.0], [-27.85, 38.75], [-27.75, 38.5], [-27.97, 37.97], [-28.5, 37.75], [-28.75, 37.85], [-28.82, 37.82], [-28.97, 37.47], [-29.5, 37.25], [-29.75, 37.35], [-30.0, 37.25], [-30.25, 37.35], [-30.5, 37.25], [-30.75, 37.35], [-30.82, 37.32], [-30.85, 37.25], [-30.75, 37.0], [-30.97, 36.47], [-31.5, 36.25], [-31.75, 36.35], [-32.0, 36.25], [-32.25, 36.35], [-32.5, 36.25], [-32.75, 36.35], [-33.0, 36.25], [-33.25, 36.35], [-33.5, 36.25], [-34.0, 36.46], [-34.5, 36.25], [-35.03, 36.47], [-35.25, 37.0], [-35.03, 37.53], [-34.68, 37.68], [-34.53, 38.03], [-34.0, 38.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.9481228878760248}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5360015319712577}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.44103559463622, 21.17753716688071, 21.567618617243397]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.364750078258396, 19.9655320848413, 20.413672004250202]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4227285766566942, -1.7552199978899996, -1.4300560213670792]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8191026023733912, -1.9481228878760248, -1.8209613992690379]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5155658204217235, -1.9330485746090487, -1.6435243284016618]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8563081522674723, -2.119860909942132, -2.1789314005181266]}}