{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:46.137741", "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-Mar-05_to_2025-Mar-07_198.5_-10.0"}, "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": 2025030000154}, "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": "March 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 07 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": 57758.88521744452}, "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": ["Cook Islands"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Oceania"]}, "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": ["Pacific 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": -10.0}, "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": 198.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "198.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 197.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 200.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -11.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -9.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-162.5, -8.75], [-162.25, -8.85], [-162.0, -8.75], [-161.75, -8.85], [-161.5, -8.75], [-160.97, -8.97], [-160.82, -9.32], [-160.47, -9.47], [-160.32, -9.82], [-160.25, -9.85], [-160.0, -9.75], [-159.75, -9.85], [-159.5, -9.75], [-158.97, -9.97], [-158.75, -10.5], [-158.85, -10.75], [-158.75, -11.0], [-158.85, -11.25], [-158.75, -11.5], [-158.97, -12.03], [-159.5, -12.25], [-160.03, -12.03], [-160.18, -11.68], [-160.25, -11.65], [-160.5, -11.75], [-160.75, -11.65], [-161.0, -11.75], [-161.25, -11.65], [-161.5, -11.75], [-162.03, -11.53], [-162.18, -11.18], [-162.53, -11.03], [-162.68, -10.68], [-163.03, -10.53], [-163.25, -10.0], [-163.15, -9.75], [-163.25, -9.5], [-163.03, -8.97], [-162.5, -8.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Pacific-Ocean", "S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.25, -9.5], [-163.03, -8.97], [-162.5, -8.75], [-162.25, -8.85], [-162.0, -8.75], [-161.75, -8.85], [-161.5, -8.75], [-160.97, -8.97], [-160.82, -9.32], [-160.47, -9.47], [-160.32, -9.82], [-160.25, -9.85], [-160.0, -9.75], [-159.75, -9.85], [-159.5, -9.75], [-158.97, -9.97], [-158.75, -10.5], [-158.85, -10.75], [-158.75, -11.0], [-158.85, -11.25], [-158.75, -11.5], [-158.97, -12.03], [-159.5, -12.25], [-160.03, -12.03], [-160.18, -11.68], [-160.25, -11.65], [-160.5, -11.75], [-160.75, -11.65], [-161.0, -11.75], [-161.25, -11.65], [-161.5, -11.75], [-162.03, -11.53], [-162.18, -11.18], [-162.53, -11.03], [-162.68, -10.68], [-163.03, -10.53], [-163.25, -10.0], [-163.15, -9.75], [-163.25, -9.5]]]]}, "2025-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.25, -9.5], [-163.03, -8.97], [-162.5, -8.75], [-162.25, -8.85], [-162.0, -8.75], [-161.75, -8.85], [-161.5, -8.75], [-160.97, -8.97], [-160.82, -9.32], [-160.47, -9.47], [-160.32, -9.82], [-160.25, -9.85], [-160.0, -9.75], [-159.75, -9.85], [-159.5, -9.75], [-158.97, -9.97], [-158.75, -10.5], [-158.85, -10.75], [-158.75, -11.0], [-158.85, -11.25], [-158.75, -11.5], [-158.97, -12.03], [-159.5, -12.25], [-160.03, -12.03], [-160.18, -11.68], [-160.25, -11.65], [-160.5, -11.75], [-160.75, -11.65], [-161.0, -11.75], [-161.25, -11.65], [-161.5, -11.75], [-162.03, -11.53], [-162.18, -11.18], [-162.53, -11.03], [-162.68, -10.68], [-163.03, -10.53], [-163.25, -10.0], [-163.15, -9.75], [-163.25, -9.5]]]]}, "2025-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.25, -9.5], [-163.03, -8.97], [-162.5, -8.75], [-162.25, -8.85], [-162.0, -8.75], [-161.75, -8.85], [-161.5, -8.75], [-160.97, -8.97], [-160.82, -9.32], [-160.47, -9.47], [-160.32, -9.82], [-160.25, -9.85], [-160.0, -9.75], [-159.75, -9.85], [-159.5, -9.75], [-158.97, -9.97], [-158.75, -10.5], [-158.85, -10.75], [-158.75, -11.0], [-158.85, -11.25], [-158.75, -11.5], [-158.97, -12.03], [-159.5, -12.25], [-160.03, -12.03], [-160.18, -11.68], [-160.25, -11.65], [-160.5, -11.75], [-160.75, -11.65], [-161.0, -11.75], [-161.25, -11.65], [-161.5, -11.75], [-162.03, -11.53], [-162.18, -11.18], [-162.53, -11.03], [-162.68, -10.68], [-163.03, -10.53], [-163.25, -10.0], [-163.15, -9.75], [-163.25, -9.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.4286280174497392}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.1015727091227732}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.988415219491003, 25.981186100474645, 26.104341326261817]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.752515411376976, 25.683625793457054, 25.962110137939476]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1240588332557129, -1.1444937496335204, -1.036165544479086]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.3832374651266264, -1.4286280174497392, -1.1773544445319999]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6558165962489653, -1.6530405286554963, -1.4744055726643097]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.015184327941593, -2.080739978961274, -1.7001766015287303]}}