{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:23.468289", "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-17_to_2025-Jul-19_5.0_-64.5"}, "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": 2025070000688}, "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 17 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 19 2025"}, "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": 52152.48877696004}, "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": ["Southern 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": -64.5}, "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": 5.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "5.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 2.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 8.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -66.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -64.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[2.0, -65.25], [2.25, -65.35], [2.32, -65.32], [2.35, -65.25], [2.25, -65.0], [2.47, -64.47], [2.82, -64.32], [2.97, -63.97], [3.5, -63.75], [3.75, -63.85], [3.82, -63.82], [3.97, -63.47], [4.5, -63.25], [5.03, -63.47], [5.18, -63.82], [5.25, -63.85], [5.5, -63.75], [5.75, -63.85], [5.82, -63.82], [5.97, -63.47], [6.5, -63.25], [6.75, -63.35], [7.0, -63.25], [7.25, -63.35], [7.5, -63.25], [8.03, -63.47], [8.18, -63.82], [8.25, -63.85], [8.5, -63.75], [9.03, -63.97], [9.25, -64.5], [9.03, -65.03], [8.68, -65.18], [8.53, -65.53], [8.0, -65.75], [7.75, -65.65], [7.5, -65.75], [7.25, -65.65], [7.0, -65.75], [6.75, -65.65], [6.68, -65.68], [6.53, -66.03], [6.0, -66.25], [5.75, -66.15], [5.5, -66.25], [5.25, -66.15], [5.0, -66.25], [4.75, -66.15], [4.68, -66.18], [4.53, -66.53], [4.0, -66.75], [3.75, -66.65], [3.5, -66.75], [3.25, -66.65], [3.18, -66.68], [3.03, -67.03], [2.5, -67.25], [2.25, -67.15], [2.0, -67.25], [1.47, -67.03], [1.25, -66.5], [1.35, -66.25], [1.25, -66.0], [1.47, -65.47], [2.0, -65.25]]]]}}, "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": {"2025-07-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.25, -66.0], [1.47, -65.47], [2.0, -65.25], [2.25, -65.35], [2.32, -65.32], [2.35, -65.25], [2.25, -65.0], [2.47, -64.47], [2.82, -64.32], [2.97, -63.97], [3.5, -63.75], [3.75, -63.85], [3.82, -63.82], [3.97, -63.47], [4.5, -63.25], [5.03, -63.47], [5.18, -63.82], [5.25, -63.85], [5.5, -63.75], [5.75, -63.85], [5.82, -63.82], [5.97, -63.47], [6.5, -63.25], [6.75, -63.35], [7.0, -63.25], [7.25, -63.35], [7.5, -63.25], [8.03, -63.47], [8.18, -63.82], [8.25, -63.85], [8.5, -63.75], [9.03, -63.97], [9.25, -64.5], [9.03, -65.03], [8.68, -65.18], [8.53, -65.53], [8.0, -65.75], [7.75, -65.65], [7.5, -65.75], [7.25, -65.65], [7.0, -65.75], [6.75, -65.65], [6.68, -65.68], [6.53, -66.03], [6.0, -66.25], [5.75, -66.15], [5.5, -66.25], [5.25, -66.15], [5.0, -66.25], [4.75, -66.15], [4.68, -66.18], [4.53, -66.53], [4.0, -66.75], [3.75, -66.65], [3.5, -66.75], [3.25, -66.65], [3.18, -66.68], [3.03, -67.03], [2.5, -67.25], [2.25, -67.15], [2.0, -67.25], [1.47, -67.03], [1.25, -66.5], [1.35, -66.25], [1.25, -66.0]]]]}, "2025-07-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.25, -66.0], [1.47, -65.47], [2.0, -65.25], [2.25, -65.35], [2.32, -65.32], [2.35, -65.25], [2.25, -65.0], [2.47, -64.47], [2.82, -64.32], [2.97, -63.97], [3.5, -63.75], [3.75, -63.85], [3.82, -63.82], [3.97, -63.47], [4.5, -63.25], [5.03, -63.47], [5.18, -63.82], [5.25, -63.85], [5.5, -63.75], [5.75, -63.85], [5.82, -63.82], [5.97, -63.47], [6.5, -63.25], [6.75, -63.35], [7.0, -63.25], [7.25, -63.35], [7.5, -63.25], [8.03, -63.47], [8.18, -63.82], [8.25, -63.85], [8.5, -63.75], [9.03, -63.97], [9.25, -64.5], [9.03, -65.03], [8.68, -65.18], [8.53, -65.53], [8.0, -65.75], [7.75, -65.65], [7.5, -65.75], [7.25, -65.65], [7.0, -65.75], [6.75, 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daily evolution of maximum t2m.", "value": [-24.287866338094062, -26.977059427897103, -25.074903869628884]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.0296544146444635, -8.65703684152042, -8.089180490954082]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.34562420499509, -9.316735301434079, -9.325380351497785]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3445476498673554, -1.6389366868396162, -1.5217720662292111]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.410646338607218, -1.8004496729936101, -1.7771517799739351]}}