{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:29.264748", "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": "2025-Jul-31_to_2025-Aug-03_103.0_-65.0"}, "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": 2025070001138}, "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 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 03 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 54029.841175942274}, "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": ["Davis Sea", "Mawson 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": -65.0}, "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": 103.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "103.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 102.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 108.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -67.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -64.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[101.97, -64.47], [102.5, -64.25], [102.75, -64.35], [103.0, -64.25], [103.25, -64.35], [103.32, -64.32], [103.47, -63.97], [104.0, -63.75], [104.25, -63.85], [104.5, -63.75], [104.75, -63.85], [105.0, -63.75], [105.25, -63.85], [105.5, -63.75], [105.75, -63.85], [106.0, -63.75], [106.25, -63.85], [106.5, -63.75], [106.75, -63.85], [107.0, -63.75], [107.25, -63.85], [107.5, -63.75], [108.03, -63.97], [108.18, -64.32], [108.25, -64.35], [108.26, -64.35], [108.5, -64.25], [109.03, -64.47], [109.25, -65.0], [109.15, -65.25], [109.25, -65.5], [109.03, -66.03], [108.5, -66.25], [108.25, -66.15], [108.18, -66.18], [108.15, -66.25], [108.25, -66.5], [108.03, -67.03], [107.5, -67.25], [107.25, -67.15], [107.0, -67.25], [106.47, -67.03], [106.32, -66.68], [106.25, -66.65], [106.18, -66.68], [106.03, -67.03], [105.68, -67.18], [105.53, -67.53], [105.0, -67.75], [104.75, -67.65], [104.5, -67.75], [103.97, -67.53], [103.75, -67.0], [103.96, -66.5], [103.75, -66.0], [103.85, -65.76], [103.85, -65.75], [103.82, -65.68], [103.75, -65.65], [103.5, -65.75], [103.25, -65.65], [103.0, -65.75], [102.75, -65.65], [102.5, -65.75], [101.97, -65.53], [101.75, -65.0], [101.97, -64.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Antarctica", "Southern-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.0, -65.75], [102.47, -65.53], [102.25, -65.0], [102.47, -64.47], [103.0, -64.25], [103.25, -64.35], [103.32, -64.32], [103.47, -63.97], [104.0, -63.75], [104.25, -63.85], [104.5, -63.75], [104.75, -63.85], [105.0, -63.75], [105.25, -63.85], [105.5, -63.75], [105.75, -63.85], [106.0, -63.75], [106.25, -63.85], [106.5, -63.75], [106.75, -63.85], [107.0, -63.75], [107.25, -63.85], [107.5, -63.75], [108.03, -63.97], [108.18, -64.32], [108.53, -64.47], [108.68, -64.82], [109.03, -64.97], [109.25, -65.5], [109.03, -66.03], [108.5, -66.25], [108.25, -66.15], [108.18, 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{"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.292075398286073, -10.3301849267406, -11.699053416177378, -6.837626416774526]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4068040150285768, -1.8907424776039614, -1.968623779086877, -1.3110179844200271]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.554900401641322, -2.1886073000143167, -2.4740742615119617, -1.3743559631626308]}}