{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:26.531685", "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-Feb-13_to_2025-Feb-17_100.0_-68.0"}, "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": 2025020000330}, "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": "February 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 17 2025"}, "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": 92581.68537173704}, "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": -68.0}, "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": 100.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "100.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 99.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 112.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -71.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -67.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[98.47, -67.47], [99.0, -67.25], [99.25, -67.35], [99.5, -67.25], [99.75, -67.35], [100.0, -67.25], [100.25, -67.35], [100.5, -67.25], [100.75, -67.35], [101.0, -67.25], [101.25, -67.35], [101.5, -67.25], [101.75, -67.35], [102.0, -67.25], [102.25, -67.35], [102.32, -67.32], [102.47, -66.97], [103.0, -66.75], [103.25, -66.85], [103.5, -66.75], [103.75, -66.85], [104.0, -66.75], [104.25, -66.85], [104.5, -66.75], [104.75, -66.85], [105.0, -66.75], [105.25, -66.85], [105.5, -66.75], [106.03, -66.97], [106.18, -67.32], [106.25, -67.35], [106.5, -67.25], [107.03, -67.47], [107.25, -68.0], [107.15, -68.25], [107.18, -68.32], [107.25, -68.35], [107.5, -68.25], [108.03, -68.47], [108.18, -68.82], [108.25, -68.85], [108.5, -68.75], [109.03, -68.97], [109.18, -69.32], [109.25, -69.35], [109.5, -69.25], [109.75, -69.35], [110.0, -69.25], [110.53, -69.47], [110.68, -69.82], [110.75, -69.85], [111.0, -69.75], [111.25, -69.85], [111.5, -69.75], [112.03, -69.97], [112.18, -70.32], [112.53, -70.47], [112.75, -71.0], [112.53, -71.53], [112.0, -71.75], [111.75, -71.65], [111.5, -71.75], [111.0, -71.54], [110.5, -71.75], [110.25, -71.65], [110.0, -71.75], [109.75, -71.65], [109.5, -71.75], [109.25, -71.65], [109.0, -71.75], [108.75, -71.65], [108.5, -71.75], [107.97, -71.53], [107.82, -71.18], [107.75, -71.15], [107.5, -71.25], [106.97, -71.03], [106.82, -70.68], [106.75, -70.65], [106.5, -70.75], [106.25, -70.65], [106.0, -70.75], [105.47, -70.53], [105.32, -70.18], [105.25, -70.15], [105.0, -70.25], [104.47, -70.03], [104.32, -69.68], [104.25, -69.65], [104.0, -69.75], [103.75, -69.65], [103.5, -69.75], [103.25, -69.65], [103.18, -69.68], [103.03, -70.03], [102.5, -70.25], [101.97, -70.03], [101.82, -69.68], [101.75, -69.65], [101.5, -69.75], [101.25, -69.65], [101.0, -69.75], [100.47, -69.53], [100.32, -69.18], [100.25, -69.15], [100.0, -69.25], [99.47, -69.03], [99.32, -68.68], [99.25, -68.65], [99.0, -68.75], [98.47, -68.53], [98.25, -68.0], [98.47, -67.47]]]]}}, "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": {"2025-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.97, -68.53], [98.75, -68.0], [98.97, -67.47], [99.5, -67.25], [99.75, -67.35], [100.0, -67.25], [100.25, -67.35], [100.5, -67.25], [100.75, -67.35], [101.0, -67.25], [101.25, -67.35], [101.5, -67.25], [101.75, -67.35], [102.0, -67.25], [102.25, -67.35], [102.32, -67.32], [102.47, -66.97], [103.0, -66.75], [103.25, -66.85], [103.5, -66.75], [103.75, -66.85], [104.0, -66.75], [104.25, -66.85], [104.5, -66.75], [104.75, -66.85], [105.0, -66.75], [105.25, -66.85], [105.5, -66.75], [106.03, -66.97], [106.18, -67.32], [106.25, -67.35], [106.5, -67.25], [107.03, -67.47], [107.25, -68.0], [107.15, -68.25], [107.18, -68.32], [107.25, -68.35], [107.5, -68.25], [108.03, -68.47], [108.18, -68.82], [108.25, -68.85], [108.5, -68.75], [109.03, -68.97], [109.18, -69.32], [109.25, -69.35], [109.5, -69.25], [109.75, -69.35], [110.0, -69.25], [110.53, -69.47], [110.68, -69.82], [110.75, -69.85], [111.0, -69.75], [111.25, -69.85], [111.5, -69.75], [112.03, -69.97], [112.18, -70.32], [112.53, -70.47], [112.75, -71.0], [112.53, -71.53], [112.0, -71.75], [111.75, -71.65], [111.5, -71.75], [111.0, -71.54], [110.5, -71.75], [110.25, -71.65], [110.0, -71.75], [109.75, -71.65], [109.5, -71.75], [109.25, -71.65], [109.0, -71.75], [108.75, -71.65], [108.5, -71.75], [107.97, -71.53], [107.82, -71.18], [107.75, -71.15], [107.5, -71.25], [106.97, -71.03], [106.82, -70.68], [106.75, -70.65], [106.5, -70.75], [106.25, -70.65], [106.0, -70.75], [105.47, -70.53], [105.32, -70.18], [105.25, -70.15], [105.0, -70.25], [104.47, -70.03], [104.32, -69.68], [104.25, -69.65], [104.0, -69.75], [103.75, -69.65], [103.5, -69.75], [103.25, -69.65], [103.18, -69.68], [103.03, -70.03], [102.5, -70.25], [101.97, -70.03], [101.82, -69.68], [101.47, -69.53], [101.32, -69.18], [101.25, -69.15], [101.0, -69.25], [100.75, -69.15], [100.5, -69.25], [100.25, -69.15], [100.0, -69.25], [99.47, -69.03], [99.32, -68.68], [98.97, -68.53]]]]}, "2025-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.97, -68.53], [98.75, -68.0], [98.97, -67.47], [99.5, -67.25], [99.75, -67.35], [100.0, -67.25], [100.25, -67.35], [100.5, -67.25], [100.75, -67.35], [101.0, -67.25], [101.25, -67.35], [101.5, -67.25], [101.75, -67.35], [102.0, -67.25], [102.25, -67.35], [102.32, -67.32], [102.47, -66.97], [103.0, -66.75], [103.25, -66.85], [103.5, -66.75], [103.75, -66.85], [104.0, -66.75], [104.25, -66.85], [104.5, -66.75], [104.75, -66.85], [105.0, -66.75], [105.25, -66.85], [105.5, -66.75], [106.03, -66.97], [106.18, -67.32], [106.25, -67.35], [106.5, -67.25], [107.03, -67.47], [107.25, -68.0], [107.15, -68.25], [107.18, -68.32], [107.25, -68.35], [107.5, -68.25], [108.03, -68.47], [108.18, -68.82], [108.25, -68.85], [108.5, -68.75], [109.03, -68.97], [109.18, -69.32], [109.25, -69.35], [109.5, -69.25], [109.75, -69.35], [110.0, -69.25], [110.53, -69.47], [110.68, -69.82], [110.75, -69.85], [111.0, -69.75], [111.25, -69.85], [111.5, -69.75], [112.03, -69.97], [112.18, -70.32], [112.53, -70.47], [112.75, -71.0], [112.53, -71.53], [112.0, -71.75], [111.75, -71.65], [111.5, -71.75], [111.0, -71.54], [110.5, -71.75], [110.25, -71.65], [110.0, -71.75], [109.75, -71.65], [109.5, -71.75], [109.25, -71.65], [109.0, -71.75], [108.75, -71.65], [108.5, -71.75], [107.97, -71.53], [107.82, -71.18], [107.75, -71.15], [107.5, -71.25], [106.97, -71.03], [106.82, -70.68], [106.75, -70.65], [106.5, -70.75], [106.25, -70.65], [106.0, -70.75], [105.47, -70.53], [105.32, -70.18], [105.25, -70.15], [105.0, -70.25], [104.47, -70.03], [104.32, -69.68], [104.25, -69.65], [104.0, -69.75], [103.75, -69.65], [103.5, -69.75], [103.25, -69.65], [103.18, -69.68], [103.03, -70.03], [102.5, -70.25], [101.97, -70.03], [101.82, -69.68], [101.75, -69.65], [101.5, -69.75], [101.25, -69.65], [101.0, -69.75], [100.47, -69.53], [100.32, -69.18], [100.25, -69.15], [100.0, -69.25], [99.47, -69.03], [99.32, -68.68], [98.97, -68.53]]]]}, "2025-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.0, -68.75], [98.47, -68.53], [98.25, -68.0], [98.47, -67.47], [99.0, -67.25], [99.25, -67.35], [99.5, -67.25], [99.75, -67.35], [100.0, -67.25], [100.25, -67.35], [100.5, -67.25], [100.75, -67.35], [101.0, -67.25], [101.25, -67.35], [101.5, -67.25], [101.75, -67.35], [102.0, -67.25], [102.25, -67.35], [102.32, -67.32], [102.47, -66.97], [103.0, -66.75], [103.25, -66.85], [103.5, -66.75], [103.75, -66.85], [104.0, -66.75], [104.25, -66.85], [104.5, -66.75], [104.75, -66.85], [105.0, -66.75], [105.25, -66.85], [105.5, -66.75], [106.03, -66.97], [106.18, -67.32], [106.25, -67.35], [106.5, -67.25], [107.03, -67.47], [107.25, -68.0], [107.15, -68.25], [107.18, -68.32], [107.25, -68.35], [107.5, -68.25], [108.03, -68.47], [108.18, -68.82], [108.25, -68.85], [108.5, -68.75], [109.03, -68.97], [109.18, -69.32], [109.25, -69.35], [109.5, -69.25], [109.75, -69.35], [110.0, -69.25], [110.53, -69.47], [110.68, -69.82], [110.75, -69.85], [111.0, -69.75], [111.25, -69.85], [111.5, -69.75], [112.03, -69.97], [112.18, -70.32], [112.53, -70.47], [112.75, -71.0], [112.53, -71.53], [112.0, -71.75], [111.75, -71.65], [111.5, -71.75], [111.0, -71.54], [110.5, -71.75], [110.25, -71.65], [110.0, -71.75], [109.75, -71.65], [109.5, -71.75], [109.25, -71.65], [109.0, -71.75], [108.75, -71.65], [108.5, -71.75], [107.97, -71.53], [107.82, -71.18], [107.75, -71.15], [107.5, -71.25], [106.97, -71.03], [106.82, -70.68], [106.75, -70.65], [106.5, -70.75], [106.25, -70.65], [106.0, -70.75], [105.47, -70.53], [105.32, -70.18], [105.25, -70.15], [105.0, -70.25], [104.47, -70.03], [104.32, -69.68], [104.25, -69.65], [104.0, -69.75], [103.75, -69.65], [103.5, -69.75], [103.25, -69.65], [103.18, -69.68], [103.03, -70.03], [102.5, -70.25], [101.97, -70.03], [101.82, -69.68], [101.75, -69.65], [101.5, -69.75], [101.25, -69.65], [101.0, -69.75], [100.47, -69.53], [100.32, -69.18], [100.25, -69.15], [100.0, -69.25], [99.47, -69.03], [99.32, -68.68], [99.25, -68.65], [99.0, -68.75]]]]}, "2025-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.0, -68.75], [98.47, -68.53], [98.25, -68.0], [98.47, -67.47], [99.0, -67.25], [99.25, -67.35], [99.5, -67.25], [99.75, -67.35], [100.0, -67.25], [100.25, -67.35], [100.5, -67.25], [100.75, -67.35], [101.0, -67.25], [101.25, -67.35], [101.5, -67.25], [101.75, -67.35], [102.0, -67.25], [102.25, -67.35], [102.32, -67.32], [102.47, -66.97], [103.0, -66.75], [103.25, -66.85], [103.5, -66.75], [104.03, -66.97], [104.25, -67.5], [104.03, -68.03], [103.68, -68.18], [103.65, -68.25], [103.75, -68.5], [103.53, -69.03], [103.0, -69.25], [102.75, -69.15], [102.68, -69.18], [102.53, -69.53], [102.0, -69.75], [101.75, -69.65], [101.5, -69.75], [101.25, -69.65], [101.0, -69.75], [100.47, -69.53], [100.32, -69.18], [100.25, -69.15], [100.0, -69.25], [99.47, -69.03], [99.32, -68.68], [99.25, -68.65], [99.0, -68.75]]]]}, "2025-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.47, -67.47], [99.0, -67.25], [99.53, -67.47], [99.75, -68.0], [99.53, -68.53], [99.0, -68.75], [98.47, -68.53], [98.25, -68.0], [98.47, -67.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.082799751188645}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.743324858784534}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-31.964640602457138, -32.11423256349363, -32.365095277816465, -28.113554473150373, -25.731469853719062]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-38.862278366088844, -39.807471338907845, -40.260638936360664, -31.351138178507455, -25.731469853719062]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.615790937059067, -5.683878741979386, -6.010143787606427, -5.441255340205738, -4.938270082489964]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.514931050444545, -6.846510734715736, -7.082799751188645, -6.1452812828381695, -4.938270082489964]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.385680033492051, -1.3653851105588133, -1.391872622545743, -1.3768439883572823, -1.1676539256727105]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4783613738869428, -1.4655544043180597, -1.5294290406283928, -1.5646600551574374, -1.1676539256727105]}}