{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:19:50.507196", "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": "2020-Dec-18_to_2020-Dec-23_128.5_-67.0"}, "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": 2020120000714}, "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": "December 18 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 23 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 73845.22463646569}, "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": ["Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": []}, "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": -67.0}, "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": 128.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "128.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 119.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 132.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -68.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -66.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[131.75, -67.854], [132.0, -67.75], [132.53, -67.97], [132.75, -68.5], [132.53, -69.03], [132.0, -69.25], [131.75, -69.146], [131.5, -69.25], [131.25, -69.146], [131.0, -69.25], [130.75, -69.146], [130.5, -69.25], [130.25, -69.146], [130.0, -69.25], [129.75, -69.146], [129.5, -69.25], [129.25, -69.146], [129.0, -69.25], [128.75, -69.146], [128.5, -69.25], [128.25, -69.146], [128.0, -69.25], [127.75, -69.146], [127.5, -69.25], [127.25, -69.146], [127.0, -69.25], [126.75, -69.146], [126.5, -69.25], [126.25, -69.146], [126.0, -69.25], [125.75, -69.146], [125.5, -69.25], [125.25, -69.146], [125.0, -69.25], [124.75, -69.146], [124.5, -69.25], [124.25, -69.146], [124.0, -69.25], [123.47, -69.03], [123.323, -68.677], [122.97, -68.53], [122.802, -68.125], [122.5, -68.25], [122.25, -68.146], [122.0, -68.25], [121.5, -68.043], [121.0, -68.25], [120.75, -68.146], [120.5, -68.25], [120.25, -68.146], [120.0, -68.25], [119.75, -68.146], [119.5, -68.25], [118.97, -68.03], [118.75, -67.5], [118.97, -66.97], [119.5, -66.75], [119.75, -66.854], [119.823, -66.823], [119.97, -66.47], [120.5, -66.25], [120.75, -66.354], [121.0, -66.25], [121.25, -66.354], [121.5, -66.25], [121.75, -66.354], [122.0, -66.25], [122.25, -66.354], [122.5, -66.25], [122.75, -66.354], [123.0, -66.25], [123.25, -66.354], [123.5, -66.25], [123.75, -66.354], [124.0, -66.25], [124.25, -66.354], [124.5, -66.25], [124.75, -66.354], [125.0, -66.25], [125.25, -66.354], [125.323, -66.323], [125.47, -65.97], [126.0, -65.75], [126.25, -65.854], [126.5, -65.75], [126.75, -65.854], [127.0, -65.75], [127.53, -65.97], [127.677, -66.323], [127.75, -66.354], [128.0, -66.25], [128.25, -66.354], [128.5, -66.25], [128.75, -66.354], [129.0, -66.25], [129.53, -66.47], [129.75, -67.0], [129.625, -67.302], [129.75, -67.354], [130.0, -67.25], [130.53, -67.47], [130.677, -67.823], [130.726, -67.844], [130.75, -67.854], [131.0, -67.75], [131.25, -67.854], [131.5, -67.75], [131.75, -67.854]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Antarctica"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.5, -69.25], [130.96966991411009, -69.03033008588991], [130.75, -68.5], [130.96966991411009, -67.96966991411009], [131.5, -67.75], [131.75, -67.85355339059328], [132.0, -67.75], [132.53033008588991, -67.96966991411009], [132.75, -68.5], [132.53033008588991, -69.03033008588991], [132.0, -69.25], [131.75, -69.14644660940672], [131.5, -69.25]]], [[[128.5, -67.75], [127.96966991411009, -67.53033008588991], [127.75, -67.0], [127.96966991411009, -66.46966991411009], [128.5, -66.25], [128.75, -66.35355339059328], [129.0, -66.25], [129.53033008588991, -66.46966991411009], [129.75, -67.0], [129.57322330470336, -67.42677669529662], [130.0, -67.25], [130.53033008588991, -67.46966991411009], [130.75, -68.0], [130.53033008588991, -68.53033008588991], [130.0, -68.75], [129.46966991411009, -68.53033008588991], [129.25, -68.0], [129.42677669529664, -67.57322330470338], [129.0, -67.75], [128.75, -67.64644660940672], [128.5, -67.75]]]]}, "2020-12-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[123.32322330470336, -68.67677669529664], [122.96966991411009, -68.53033008588991], [122.75, -68.0], [122.96966991411009, -67.46966991411009], [123.5, -67.25], [123.75, -67.35355339059328], [123.82322330470336, -67.32322330470336], [123.96966991411009, -66.96966991411009], [124.5, -66.75], [124.75, -66.85355339059328], [125.0, -66.75], [125.25, -66.85355339059328], [125.5, -66.75], [125.75, -66.85355339059328], [126.0, -66.75], [126.25, -66.85355339059328], [126.5, -66.75], [126.75, -66.85355339059328], [127.0, -66.75], [127.25, -66.85355339059328], [127.32322330470336, -66.82322330470336], [127.46966991411009, -66.46966991411009], [128.0, -66.25], [128.25, -66.35355339059328], [128.5, -66.25], [128.75, -66.35355339059328], [129.0, -66.25], [129.53033008588991, -66.46966991411009], [129.75, -67.0], [129.625, -67.30177669529664], [129.75, -67.35355339059328], [130.0, -67.25], [130.53033008588991, -67.46966991411009], [130.67677669529664, -67.82322330470336], [130.75, -67.85355339059328], [131.0, -67.75], [131.25, -67.85355339059328], [131.5, -67.75], [131.75, -67.85355339059328], [132.0, -67.75], [132.53033008588991, -67.96966991411009], [132.75, -68.5], [132.53033008588991, -69.03033008588991], [132.0, -69.25], [131.75, -69.14644660940672], [131.5, -69.25], [131.25, -69.14644660940672], [131.0, -69.25], [130.75, -69.14644660940672], [130.5, -69.25], [130.25, -69.14644660940672], [130.0, -69.25], [129.75, -69.14644660940672], [129.5, -69.25], [129.25, -69.14644660940672], [129.0, -69.25], [128.75, -69.14644660940672], [128.5, -69.25], [128.25, -69.14644660940672], [128.0, -69.25], [127.75, -69.14644660940672], [127.5, -69.25], [127.25, -69.14644660940672], [127.0, -69.25], [126.75, -69.14644660940672], [126.5, -69.25], [126.25, -69.14644660940672], [126.0, -69.25], [125.75, -69.14644660940672], [125.5, -69.25], [125.25, -69.14644660940672], [125.0, -69.25], [124.75, -69.14644660940672], [124.5, -69.25], [124.25, -69.14644660940672], [124.0, -69.25], [123.46966991411009, -69.03033008588991], [123.32322330470336, -68.67677669529664]]]}, "2020-12-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[120.75, -67.64644660940672], [120.5, -67.75], [119.96966991411009, -67.53033008588991], [119.75, -67.0], [119.96966991411009, -66.46966991411009], [120.5, -66.25], [120.75, -66.35355339059328], [121.0, -66.25], [121.25, -66.35355339059328], [121.5, -66.25], [121.75, -66.35355339059328], [122.0, -66.25], [122.25, -66.35355339059328], [122.5, -66.25], [122.75, -66.35355339059328], [123.0, -66.25], [123.25, -66.35355339059328], [123.5, -66.25], [123.75, -66.35355339059328], [124.0, -66.25], [124.25, -66.35355339059328], [124.5, -66.25], [124.75, -66.35355339059328], [125.0, -66.25], [125.25, -66.35355339059328], [125.32322330470336, -66.32322330470336], [125.46966991411009, -65.96966991411009], [126.0, -65.75], [126.25, -65.85355339059328], [126.5, -65.75], [126.75, -65.85355339059328], [127.0, -65.75], [127.53033008588991, -65.96966991411009], [127.67677669529664, -66.32322330470336], [127.75, -66.35355339059328], [128.0, -66.25], [128.25, -66.35355339059328], [128.5, -66.25], [128.75, -66.35355339059328], [129.0, -66.25], [129.53033008588991, -66.46966991411009], [129.75, -67.0], [129.625, -67.30177669529664], [129.75, -67.35355339059328], [130.0, -67.25], [130.53033008588991, -67.46966991411009], [130.67677669529664, -67.82322330470336], [130.75, -67.85355339059328], [131.0, -67.75], [131.25, -67.85355339059328], [131.5, -67.75], [131.75, -67.85355339059328], [132.0, -67.75], [132.53033008588991, -67.96966991411009], [132.75, -68.5], [132.53033008588991, -69.03033008588991], [132.0, -69.25], [131.75, -69.14644660940672], [131.5, -69.25], [131.25, -69.14644660940672], [131.0, -69.25], [130.75, -69.14644660940672], [130.5, -69.25], [130.25, -69.14644660940672], [130.0, -69.25], [129.75, -69.14644660940672], [129.5, -69.25], [129.25, -69.14644660940672], [129.0, -69.25], [128.75, -69.14644660940672], [128.5, -69.25], [128.25, -69.14644660940672], [128.0, -69.25], [127.75, -69.14644660940672], [127.5, -69.25], [127.25, -69.14644660940672], [127.0, -69.25], [126.75, -69.14644660940672], [126.5, -69.25], [126.25, -69.14644660940672], [126.0, -69.25], [125.75, -69.14644660940672], [125.5, -69.25], [125.25, -69.14644660940672], [125.0, -69.25], [124.75, -69.14644660940672], [124.5, -69.25], [124.25, -69.14644660940672], [124.0, -69.25], [123.46966991411009, -69.03033008588991], [123.32322330470336, -68.67677669529664], [122.96966991411009, -68.53033008588991], [122.80177669529664, -68.125], [122.5, -68.25], [121.96966991411009, -68.03033008588991], [121.82322330470336, -67.67677669529664], [121.75, -67.64644660940672], [121.5, -67.75], [121.25, -67.64644660940672], [121.0, -67.75], [120.75, -67.64644660940672]]]}, "2020-12-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[119.75, -68.14644660940672], [119.5, -68.25], [118.96966991411009, -68.03033008588991], [118.75, -67.5], [118.96966991411009, -66.96966991411009], [119.5, -66.75], [119.75, -66.85355339059328], [119.82322330470336, -66.82322330470336], [119.96966991411009, -66.46966991411009], [120.5, -66.25], [120.75, -66.35355339059328], [121.0, -66.25], [121.25, -66.35355339059328], [121.5, -66.25], [121.75, -66.35355339059328], [122.0, -66.25], [122.25, -66.35355339059328], [122.5, -66.25], [122.75, -66.35355339059328], [123.0, -66.25], [123.25, -66.35355339059328], [123.5, -66.25], [123.75, -66.35355339059328], [124.0, -66.25], [124.25, -66.35355339059328], [124.5, -66.25], [124.75, -66.35355339059328], [125.0, -66.25], [125.25, -66.35355339059328], [125.32322330470336, -66.32322330470336], [125.46966991411009, -65.96966991411009], [126.0, -65.75], [126.25, -65.85355339059328], [126.5, -65.75], [126.75, -65.85355339059328], [127.0, -65.75], [127.53033008588991, -65.96966991411009], [127.67677669529664, -66.32322330470336], [127.75, -66.35355339059328], [128.0, -66.25], [128.25, -66.35355339059328], [128.5, -66.25], [128.75, -66.35355339059328], [129.0, -66.25], [129.53033008588991, -66.46966991411009], [129.75, -67.0], [129.625, -67.30177669529664], [129.75, -67.35355339059328], [130.0, -67.25], [130.53033008588991, -67.46966991411009], [130.67677669529664, -67.82322330470336], [130.75, -67.85355339059328], [131.0, -67.75], [131.53033008588991, -67.96966991411009], [131.75, -68.5], [131.53033008588991, -69.03033008588991], [131.0, -69.25], [130.75, -69.14644660940672], [130.5, -69.25], [130.25, -69.14644660940672], [130.0, -69.25], [129.75, -69.14644660940672], [129.5, -69.25], [129.25, -69.14644660940672], [129.0, -69.25], [128.75, -69.14644660940672], [128.5, -69.25], [128.25, -69.14644660940672], [128.0, -69.25], [127.75, -69.14644660940672], [127.5, -69.25], [127.25, -69.14644660940672], [127.0, -69.25], [126.75, -69.14644660940672], [126.5, -69.25], [126.25, -69.14644660940672], [126.0, -69.25], [125.75, -69.14644660940672], [125.5, -69.25], [125.25, -69.14644660940672], [125.0, -69.25], [124.75, -69.14644660940672], [124.5, -69.25], [124.25, -69.14644660940672], [124.0, -69.25], [123.46966991411009, -69.03033008588991], [123.32322330470336, -68.67677669529664], [122.96966991411009, -68.53033008588991], [122.80177669529664, -68.125], [122.5, -68.25], [122.25, -68.14644660940672], [122.0, -68.25], [121.5, -68.04289321881346], [121.0, -68.25], [120.75, -68.14644660940672], [120.5, -68.25], [120.25, -68.14644660940672], [120.0, -68.25], [119.75, -68.14644660940672]]]}, "2020-12-22T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[119.75, -68.14644660940672], [119.5, -68.25], [118.96966991411009, -68.03033008588991], [118.75, -67.5], [118.96966991411009, -66.96966991411009], [119.5, -66.75], [119.75, -66.85355339059328], [119.82322330470336, -66.82322330470336], [119.96966991411009, -66.46966991411009], [120.5, -66.25], [120.75, -66.35355339059328], [121.0, -66.25], [121.25, -66.35355339059328], [121.5, -66.25], [121.75, -66.35355339059328], [122.0, -66.25], [122.25, -66.35355339059328], [122.5, -66.25], [122.75, -66.35355339059328], [123.0, -66.25], [123.25, -66.35355339059328], [123.5, -66.25], [123.75, -66.35355339059328], [124.0, -66.25], [124.25, -66.35355339059328], [124.5, -66.25], [124.75, -66.35355339059328], [125.0, -66.25], [125.25, -66.35355339059328], [125.32322330470336, -66.32322330470336], [125.46966991411009, -65.96966991411009], [126.0, -65.75], [126.25, -65.85355339059328], [126.5, -65.75], [126.75, -65.85355339059328], [127.0, -65.75], [127.53033008588991, -65.96966991411009], [127.67677669529664, -66.32322330470336], [127.75, -66.35355339059328], [128.0, -66.25], [128.25, -66.35355339059328], [128.5, -66.25], [128.75, -66.35355339059328], [129.0, -66.25], [129.53033008588991, -66.46966991411009], [129.75, -67.0], [129.54289321881345, -67.5], [129.67677669529664, -67.82322330470336], [129.75, -67.85355339059328], [130.0, -67.75], [130.25, -67.85355339059328], [130.5, -67.75], [131.03033008588991, -67.96966991411009], [131.25, -68.5], [131.03033008588991, -69.03033008588991], [130.5, -69.25], [130.25, -69.14644660940672], [130.0, -69.25], [129.75, -69.14644660940672], [129.5, -69.25], [129.25, -69.14644660940672], [129.0, -69.25], [128.75, -69.14644660940672], [128.5, -69.25], [128.25, -69.14644660940672], [128.0, -69.25], [127.75, -69.14644660940672], [127.5, -69.25], [127.25, -69.14644660940672], [127.0, -69.25], [126.75, -69.14644660940672], [126.5, -69.25], [126.25, -69.14644660940672], [126.0, -69.25], [125.75, -69.14644660940672], [125.5, -69.25], [125.25, -69.14644660940672], [125.0, -69.25], [124.75, -69.14644660940672], [124.5, -69.25], [123.96966991411009, -69.03033008588991], [123.82322330470336, -68.67677669529664], [123.75, -68.64644660940672], [123.5, -68.75], [122.96966991411009, -68.53033008588991], [122.80177669529664, -68.125], [122.5, -68.25], [122.25, -68.14644660940672], [122.0, -68.25], [121.5, -68.04289321881346], [121.0, -68.25], [120.75, -68.14644660940672], [120.5, -68.25], [120.25, -68.14644660940672], [120.0, -68.25], [119.75, -68.14644660940672]]]}, "2020-12-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[119.75, -68.14644660940672], [119.5, -68.25], [118.96966991411009, -68.03033008588991], [118.75, -67.5], [118.96966991411009, -66.96966991411009], [119.5, -66.75], [119.75, -66.85355339059328], [119.82322330470336, -66.82322330470336], [119.96966991411009, -66.46966991411009], [120.5, -66.25], [120.75, -66.35355339059328], [121.0, -66.25], [121.25, -66.35355339059328], [121.5, -66.25], [121.75, -66.35355339059328], [122.0, -66.25], [122.25, -66.35355339059328], [122.5, -66.25], [122.75, -66.35355339059328], [123.0, -66.25], [123.25, -66.35355339059328], [123.5, -66.25], [123.75, -66.35355339059328], [124.0, -66.25], [124.25, -66.35355339059328], [124.5, -66.25], [125.03033008588991, -66.46966991411009], [125.25, -67.0], [125.03033008588991, -67.53033008588991], [124.5, -67.75], [124.25, -67.64644660940672], [124.0, -67.75], [123.75, -67.64644660940672], [123.5, -67.75], [123.25, -67.64644660940672], [123.0, -67.75], [122.75, -67.64644660940672], [122.67677669529664, -67.67677669529664], [122.53033008588991, -68.03033008588991], [122.0, -68.25], [121.5, -68.04289321881346], [121.0, -68.25], [120.75, -68.14644660940672], [120.5, -68.25], [120.25, -68.14644660940672], [120.0, -68.25], [119.75, -68.14644660940672]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.165937611011287}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.063848192938732}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-14.926548379164558, -19.068703156892298, -15.958977969710418, -15.1913247927601, -14.631559538541865, -9.47708950185438]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-22.018979398687293, -23.11885890563994, -22.57473668567374, -22.46084600106937, -22.179676295761936, -13.10306078408604]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8390867467661622, -4.525878287483768, -4.099882657054376, -3.980915389446928, -3.821558624668451, -3.8700269718185973]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.997719390708255, -5.165937611011287, -4.777837020346766, -4.6762749155176095, -4.424580217252583, -4.531195916972081]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3471959955415667, -1.4700640372327691, -1.4104392439265947, -1.4077776462997418, -1.3906938347122275, -1.545453928327916]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5023429226255536, -1.588415882404388, -1.6361507788998721, -1.6303788759273146, -1.7069751099576653, -1.8141154768933927]}}