{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:07.885776", "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": "2012-Apr-04_to_2012-Apr-08_6.5_61.0"}, "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": 2012040000334}, "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": "April 04 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 08 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 278017.16529938637}, "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": ["Norway"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe"]}, "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 Sea", "Norwegian 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": 61.0}, "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": 6.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "6.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 1.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 13.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 70.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.97, 68.47], [2.75, 69.0], [2.97, 69.53], [3.5, 69.75], [3.75, 69.65], [4.0, 69.75], [4.25, 69.65], [4.5, 69.75], [5.03, 69.53], [5.18, 69.18], [5.25, 69.15], [5.32, 69.18], [5.47, 69.53], [6.0, 69.75], [6.25, 69.65], [6.5, 69.75], [6.75, 69.65], [7.0, 69.75], [7.25, 69.65], [7.5, 69.75], [7.75, 69.65], [8.0, 69.75], [8.25, 69.65], [8.5, 69.75], [9.03, 69.53], [9.18, 69.18], [9.25, 69.15], [9.32, 69.18], [9.47, 69.53], [10.0, 69.75], [10.5, 69.54], [11.0, 69.75], [11.25, 69.65], [11.32, 69.68], [11.47, 70.03], [11.82, 70.18], [11.97, 70.53], [12.5, 70.75], [13.03, 70.53], [13.18, 70.18], [13.53, 70.03], [13.68, 69.68], [14.03, 69.53], [14.25, 69.0], [14.15, 68.75], [14.25, 68.5], [14.03, 67.97], [13.68, 67.82], [13.53, 67.47], [13.18, 67.32], [13.03, 66.97], [12.5, 66.75], [12.25, 66.85], [12.0, 66.75], [11.75, 66.85], [11.5, 66.75], [11.25, 66.85], [11.0, 66.75], [10.75, 66.85], [10.68, 66.82], [10.53, 66.47], [10.0, 66.25], [9.75, 66.35], [9.5, 66.25], [9.25, 66.35], [9.0, 66.25], [8.75, 66.35], [8.5, 66.25], [7.97, 66.47], [7.82, 66.82], [7.75, 66.85], [7.5, 66.75], [6.97, 66.97], [6.82, 67.32], [6.75, 67.35], [6.5, 67.25], [5.97, 67.47], [5.82, 67.82], [5.75, 67.85], [5.5, 67.75], [5.25, 67.85], [5.0, 67.75], [4.47, 67.97], [4.32, 68.32], [4.25, 68.35], [4.0, 68.25], [3.75, 68.35], [3.5, 68.25], [2.97, 68.47]]]]}, "2012-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.97, 65.47], [0.75, 66.0], [0.97, 66.53], [1.5, 66.75], [1.75, 66.65], [1.82, 66.68], [1.97, 67.03], [2.32, 67.18], [2.47, 67.53], [3.0, 67.75], [3.25, 67.65], [3.5, 67.75], [3.75, 67.65], [4.0, 67.75], [4.25, 67.65], [4.5, 67.75], [5.03, 67.53], [5.18, 67.18], [5.25, 67.15], [5.5, 67.25], [5.75, 67.15], [6.0, 67.25], [6.53, 67.03], [6.68, 66.68], [6.75, 66.65], [7.0, 66.75], [7.3, 66.63], [7.37, 66.8], [6.97, 66.97], [6.82, 67.32], [6.75, 67.35], [6.5, 67.25], [5.97, 67.47], [5.82, 67.82], [5.75, 67.85], [5.5, 67.75], [5.25, 67.85], [5.0, 67.75], [4.47, 67.97], [4.32, 68.32], [4.25, 68.35], [4.0, 68.25], [3.75, 68.35], [3.5, 68.25], [2.97, 68.47], [2.75, 69.0], [2.97, 69.53], [3.5, 69.75], [3.75, 69.65], [4.0, 69.75], [4.25, 69.65], [4.5, 69.75], [5.03, 69.53], [5.18, 69.18], [5.25, 69.15], [5.32, 69.18], [5.47, 69.53], [6.0, 69.75], [6.25, 69.65], [6.5, 69.75], [6.75, 69.65], [7.0, 69.75], [7.25, 69.65], [7.5, 69.75], [7.75, 69.65], [8.0, 69.75], [8.25, 69.65], [8.5, 69.75], [9.03, 69.53], [9.18, 69.18], [9.25, 69.15], [9.32, 69.18], [9.47, 69.53], [10.0, 69.75], [10.5, 69.54], [11.0, 69.75], [11.25, 69.65], [11.32, 69.68], [11.47, 70.03], [11.82, 70.18], [11.97, 70.53], [12.5, 70.75], [13.03, 70.53], [13.18, 70.18], [13.53, 70.03], [13.68, 69.68], [14.03, 69.53], [14.25, 69.0], [14.15, 68.75], [14.25, 68.5], [14.03, 67.97], [13.68, 67.82], [13.53, 67.47], [13.18, 67.32], [13.04, 67.0], [13.25, 66.5], [13.03, 65.97], [12.68, 65.82], [12.65, 65.75], [12.75, 65.5], [12.53, 64.97], [12.0, 64.75], [11.75, 64.85], [11.68, 64.82], [11.53, 64.47], [11.18, 64.32], [11.03, 63.97], [10.5, 63.75], [10.25, 63.85], [10.18, 63.82], [10.03, 63.47], [9.5, 63.25], [9.25, 63.35], [9.0, 63.25], [8.75, 63.35], [8.5, 63.25], [7.97, 63.47], [7.82, 63.82], [7.75, 63.85], [7.5, 63.75], [7.25, 63.85], [7.0, 63.75], [6.75, 63.85], [6.5, 63.75], [6.25, 63.85], [6.0, 63.75], [5.47, 63.97], [5.32, 64.32], [5.25, 64.35], [5.0, 64.25], [4.75, 64.35], [4.5, 64.25], [3.97, 64.47], [3.82, 64.82], [3.75, 64.85], [3.5, 64.75], [3.25, 64.85], [3.0, 64.75], [2.47, 64.97], [2.32, 65.32], [2.25, 65.35], [2.0, 65.25], [1.75, 65.35], [1.5, 65.25], [0.97, 65.47]]]]}, "2012-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.97, 65.47], [0.75, 66.0], [0.97, 66.53], [1.5, 66.75], [1.75, 66.65], [1.82, 66.68], [1.97, 67.03], [2.32, 67.18], [2.47, 67.53], [3.0, 67.75], [3.25, 67.65], [3.5, 67.75], [3.75, 67.65], [4.0, 67.75], [4.25, 67.65], [4.5, 67.75], [5.03, 67.53], [5.18, 67.18], [5.25, 67.15], [5.5, 67.25], [5.75, 67.15], [6.0, 67.25], [6.53, 67.03], [6.68, 66.68], [6.75, 66.65], [7.0, 66.75], [7.3, 66.63], [7.37, 66.8], [6.97, 66.97], [6.82, 67.32], [6.75, 67.35], [6.5, 67.25], [5.97, 67.47], [5.82, 67.82], [5.75, 67.85], [5.5, 67.75], [5.25, 67.85], [5.0, 67.75], [4.47, 67.97], [4.32, 68.32], [4.25, 68.35], [4.0, 68.25], [3.75, 68.35], [3.5, 68.25], [2.97, 68.47], [2.75, 69.0], [2.97, 69.53], [3.5, 69.75], [3.75, 69.65], [4.0, 69.75], [4.25, 69.65], [4.5, 69.75], [5.03, 69.53], [5.18, 69.18], [5.25, 69.15], [5.32, 69.18], [5.47, 69.53], [6.0, 69.75], [6.25, 69.65], [6.5, 69.75], [6.75, 69.65], [7.0, 69.75], [7.25, 69.65], [7.5, 69.75], [7.75, 69.65], [8.0, 69.75], [8.25, 69.65], [8.5, 69.75], [9.03, 69.53], [9.18, 69.18], [9.25, 69.15], [9.32, 69.18], [9.47, 69.53], [10.0, 69.75], [10.5, 69.54], [11.0, 69.75], [11.25, 69.65], [11.32, 69.68], [11.47, 70.03], [11.82, 70.18], [11.97, 70.53], [12.5, 70.75], [13.03, 70.53], [13.18, 70.18], [13.53, 70.03], [13.68, 69.68], [14.03, 69.53], [14.25, 69.0], [14.15, 68.75], [14.25, 68.5], [14.03, 67.97], [13.68, 67.82], [13.53, 67.47], [13.18, 67.32], [13.04, 67.0], [13.25, 66.5], [13.03, 65.97], [12.68, 65.82], [12.65, 65.75], [12.75, 65.5], [12.53, 64.97], [12.0, 64.75], [11.75, 64.85], [11.68, 64.82], [11.65, 64.75], [11.75, 64.5], [11.53, 63.97], [11.0, 63.75], [10.75, 63.85], [10.5, 63.75], [10.25, 63.85], [10.18, 63.82], [10.15, 63.75], [10.25, 63.5], [10.13, 63.2], [10.25, 63.15], [10.5, 63.25], [10.75, 63.15], [11.0, 63.25], [11.53, 63.03], [11.75, 62.5], [11.54, 62.0], [11.75, 61.5], [11.53, 60.97], [11.0, 60.75], [10.75, 60.85], [10.5, 60.75], [10.25, 60.85], [10.0, 60.75], [9.75, 60.85], [9.5, 60.75], [9.25, 60.85], [9.0, 60.75], [8.5, 60.96], [8.0, 60.75], [7.75, 60.85], [7.5, 60.75], [7.25, 60.85], [7.18, 60.82], [7.03, 60.47], [6.62, 60.3], [6.75, 60.0], [6.53, 59.47], [6.0, 59.25], [5.75, 59.35], [5.5, 59.25], [5.25, 59.35], [5.0, 59.25], [4.47, 59.47], [4.25, 60.0], [4.35, 60.25], [4.32, 60.32], [3.97, 60.47], [3.75, 61.0], [3.85, 61.25], [3.75, 61.5], [3.97, 62.03], [4.32, 62.18], [4.35, 62.25], [4.25, 62.5], [4.47, 63.03], [4.88, 63.2], [4.82, 63.32], [4.75, 63.35], [4.5, 63.25], [3.97, 63.47], [3.82, 63.82], [3.47, 63.97], [3.25, 64.5], [3.35, 64.75], [3.32, 64.82], [3.25, 64.85], [3.0, 64.75], [2.47, 64.97], [2.32, 65.32], [2.25, 65.35], [2.0, 65.25], [1.75, 65.35], [1.5, 65.25], [0.97, 65.47]]]]}, "2012-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.97, 65.47], [0.75, 66.0], [0.97, 66.53], [1.5, 66.75], [1.75, 66.65], [1.82, 66.68], [1.97, 67.03], [2.32, 67.18], [2.47, 67.53], [3.0, 67.75], [3.25, 67.65], [3.5, 67.75], [3.75, 67.65], [4.0, 67.75], [4.25, 67.65], [4.5, 67.75], [5.03, 67.53], [5.18, 67.18], [5.25, 67.15], [5.5, 67.25], [5.75, 67.15], [6.0, 67.25], [6.53, 67.03], [6.68, 66.68], [6.75, 66.65], [7.0, 66.75], [7.3, 66.63], [7.47, 67.03], [7.82, 67.18], [7.97, 67.53], [8.5, 67.75], [8.75, 67.65], [9.0, 67.75], [9.53, 67.53], [9.75, 67.0], [9.65, 66.75], [9.68, 66.68], [9.75, 66.65], [9.82, 66.68], [9.97, 67.03], [10.5, 67.25], [10.75, 67.15], [11.0, 67.25], [11.25, 67.15], [11.5, 67.25], [11.75, 67.15], [12.0, 67.25], [12.25, 67.15], [12.5, 67.25], [13.03, 67.03], [13.25, 66.5], [13.03, 65.97], [12.68, 65.82], [12.65, 65.75], [12.75, 65.5], [12.53, 64.97], [12.0, 64.75], [11.75, 64.85], [11.68, 64.82], [11.65, 64.75], [11.75, 64.5], [11.53, 63.97], [11.0, 63.75], [10.75, 63.85], [10.5, 63.75], [10.25, 63.85], [10.18, 63.82], [10.15, 63.75], [10.25, 63.5], [10.13, 63.2], [10.25, 63.15], [10.5, 63.25], [10.75, 63.15], [11.0, 63.25], [11.53, 63.03], [11.75, 62.5], [11.54, 62.0], [11.75, 61.5], [11.53, 60.97], [11.0, 60.75], [10.75, 60.85], [10.5, 60.75], [10.25, 60.85], [10.0, 60.75], [9.75, 60.85], [9.5, 60.75], [9.25, 60.85], [9.0, 60.75], [8.5, 60.96], [8.0, 60.75], [7.75, 60.85], [7.5, 60.75], [7.25, 60.85], [7.18, 60.82], [7.03, 60.47], [6.62, 60.3], [6.75, 60.0], [6.53, 59.47], [6.0, 59.25], [5.75, 59.35], [5.5, 59.25], [5.25, 59.35], [5.0, 59.25], [4.47, 59.47], [4.25, 60.0], [4.35, 60.25], [4.32, 60.32], [3.97, 60.47], [3.75, 61.0], [3.85, 61.25], [3.75, 61.5], [3.97, 62.03], [4.32, 62.18], [4.35, 62.25], [4.25, 62.5], [4.47, 63.03], [4.88, 63.2], [4.82, 63.32], [4.75, 63.35], [4.5, 63.25], [3.97, 63.47], [3.82, 63.82], [3.47, 63.97], [3.25, 64.5], [3.35, 64.75], [3.32, 64.82], [3.25, 64.85], [3.0, 64.75], [2.47, 64.97], [2.32, 65.32], [2.25, 65.35], [2.0, 65.25], [1.75, 65.35], [1.5, 65.25], [0.97, 65.47]]]]}, "2012-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.47, 65.53], [4.0, 65.75], [4.25, 65.65], [4.5, 65.75], [5.03, 65.53], [5.25, 65.0], [5.47, 65.53], [6.0, 65.75], [6.25, 65.65], [6.5, 65.75], [6.75, 65.65], [6.82, 65.68], [6.97, 66.03], [7.5, 66.25], [7.75, 66.15], [8.0, 66.25], [8.25, 66.15], [8.5, 66.25], [8.75, 66.15], [9.0, 66.25], [9.25, 66.15], [9.5, 66.25], [9.75, 66.15], [10.0, 66.25], [10.25, 66.15], [10.32, 66.18], [10.47, 66.53], [11.0, 66.75], [11.53, 66.53], [11.75, 66.0], [11.53, 65.47], [11.18, 65.32], [11.15, 65.25], [11.18, 65.18], [11.53, 65.03], [11.75, 64.5], [11.53, 63.97], [11.0, 63.75], [10.75, 63.85], [10.5, 63.75], [10.25, 63.85], [10.18, 63.82], [10.15, 63.75], [10.25, 63.5], [10.13, 63.2], [10.25, 63.15], [10.5, 63.25], [10.75, 63.15], [11.0, 63.25], [11.53, 63.03], [11.75, 62.5], [11.54, 62.0], [11.75, 61.5], [11.53, 60.97], [11.0, 60.75], [10.75, 60.85], [10.5, 60.75], [10.25, 60.85], [10.0, 60.75], [9.75, 60.85], [9.5, 60.75], [9.25, 60.85], [9.0, 60.75], [8.5, 60.96], [8.0, 60.75], [7.75, 60.85], [7.5, 60.75], [7.25, 60.85], [7.18, 60.82], [7.03, 60.47], [6.62, 60.3], [6.75, 60.0], [6.53, 59.47], [6.0, 59.25], [5.75, 59.35], [5.5, 59.25], [5.25, 59.35], [5.0, 59.25], [4.47, 59.47], [4.25, 60.0], [4.35, 60.25], [4.32, 60.32], [3.97, 60.47], [3.75, 61.0], [3.85, 61.25], [3.75, 61.5], [3.97, 62.03], [4.32, 62.18], [4.35, 62.25], [4.25, 62.5], [4.47, 63.03], [4.88, 63.2], [4.82, 63.32], [4.75, 63.35], [4.5, 63.25], [3.97, 63.47], [3.82, 63.82], [3.47, 63.97], [3.25, 64.5], [3.35, 64.75], [3.25, 65.0], [3.47, 65.53]], [[5.15, 64.75], [5.18, 64.68], [5.43, 64.57], [5.25, 65.0], [5.15, 64.75]], [[6.0, 64.25], [5.57, 64.43], [5.68, 64.18], [5.75, 64.15], [6.0, 64.25]], [[6.25, 64.15], [6.38, 64.2], [6.32, 64.32], [6.25, 64.35], [6.0, 64.25], [6.25, 64.15]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.807415612564284}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.926898300696736}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.5384181311529801, -0.4855943682216548, -0.909073800582803, -0.6752493166271165, -0.8699487118357183]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.6313780884219113, -3.0625240367489255, -9.401850582883753, -11.4844392145053, -9.050968979627157]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.299401728138592, -4.052429429539454, -4.033109870656546, -4.000783938987858, -3.802510653579384]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.879943847175241, -5.2228967079173, -6.331629748173725, -8.807415612564284, -7.866268882422446]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4499178086297957, -1.88566046244155, -1.8745672082594318, -1.8336569512195109, -1.7681441939248461]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5981765850190384, -2.137345577545092, -2.4768764957045253, -3.3085106242676536, -3.553575008980007]}}