{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:52.390586", "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": "2026-Jan-21_to_2026-Jan-25_121.0_17.0"}, "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": 2026010000666}, "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": "January 21 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 25 2026"}, "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": 59327.29990277161}, "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": ["Philippines"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": ["Philippine 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": 17.0}, "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": 121.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "121.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 120.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 122.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[120.75, 13.85], [120.5, 13.75], [119.97, 13.97], [119.75, 14.5], [119.85, 14.75], [119.75, 15.0], [119.85, 15.25], [119.75, 15.5], [119.97, 16.03], [120.32, 16.18], [120.35, 16.25], [120.25, 16.5], [120.35, 16.75], [120.25, 17.0], [120.35, 17.25], [120.25, 17.5], [120.35, 17.75], [120.25, 18.0], [120.47, 18.53], [121.0, 18.75], [121.53, 18.53], [121.68, 18.18], [121.75, 18.15], [122.0, 18.25], [122.53, 18.03], [122.68, 17.68], [123.03, 17.53], [123.25, 17.0], [123.03, 16.47], [122.68, 16.32], [122.65, 16.25], [122.75, 16.0], [122.53, 15.47], [122.0, 15.25], [121.75, 15.35], [121.68, 15.32], [121.65, 15.25], [121.75, 15.0], [121.65, 14.75], [121.75, 14.5], [121.53, 13.97], [121.0, 13.75], [120.75, 13.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.75, 14.5], [121.53, 13.97], [121.0, 13.75], [120.47, 13.97], [120.25, 14.5], [120.47, 15.03], [121.0, 15.25], [121.53, 15.03], [121.75, 14.5]]], [[[120.35, 17.75], [120.25, 18.0], [120.47, 18.53], [121.0, 18.75], [121.53, 18.53], [121.68, 18.18], [121.75, 18.15], [122.0, 18.25], [122.53, 18.03], [122.68, 17.68], [123.03, 17.53], [123.25, 17.0], [123.03, 16.47], [122.68, 16.32], [122.65, 16.25], [122.75, 16.0], [122.53, 15.47], [122.0, 15.25], [121.75, 15.35], [121.5, 15.25], [121.25, 15.35], [121.0, 15.25], [120.47, 15.47], [120.25, 16.0], [120.46, 16.5], [120.25, 17.0], [120.35, 17.25], [120.25, 17.5], [120.35, 17.75]]]]}, "2026-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.75, 15.0], [119.85, 15.25], [119.75, 15.5], [119.97, 16.03], [120.32, 16.18], [120.35, 16.25], [120.25, 16.5], [120.35, 16.75], [120.25, 17.0], [120.35, 17.25], [120.25, 17.5], [120.35, 17.75], [120.25, 18.0], [120.47, 18.53], [121.0, 18.75], [121.53, 18.53], [121.68, 18.18], [121.75, 18.15], [122.0, 18.25], [122.53, 18.03], [122.68, 17.68], [123.03, 17.53], [123.25, 17.0], [123.03, 16.47], [122.68, 16.32], [122.65, 16.25], [122.75, 16.0], [122.53, 15.47], [122.0, 15.25], [121.75, 15.35], [121.68, 15.32], [121.65, 15.25], [121.75, 15.0], [121.65, 14.75], [121.75, 14.5], [121.53, 13.97], [121.0, 13.75], [120.75, 13.85], [120.5, 13.75], [119.97, 13.97], [119.75, 14.5], [119.85, 14.75], [119.75, 15.0]]]]}, "2026-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.75, 15.0], [119.85, 15.25], [119.75, 15.5], [119.97, 16.03], [120.32, 16.18], [120.35, 16.25], [120.25, 16.5], [120.35, 16.75], [120.25, 17.0], [120.35, 17.25], [120.25, 17.5], [120.35, 17.75], [120.25, 18.0], [120.47, 18.53], [121.0, 18.75], [121.53, 18.53], [121.68, 18.18], [121.75, 18.15], [122.0, 18.25], [122.53, 18.03], [122.68, 17.68], [123.03, 17.53], [123.25, 17.0], [123.03, 16.47], [122.68, 16.32], [122.65, 16.25], [122.75, 16.0], [122.53, 15.47], [122.0, 15.25], [121.75, 15.35], [121.68, 15.32], [121.65, 15.25], [121.75, 15.0], [121.65, 14.75], [121.75, 14.5], [121.53, 13.97], [121.0, 13.75], [120.75, 13.85], [120.5, 13.75], [119.97, 13.97], [119.75, 14.5], [119.85, 14.75], [119.75, 15.0]]]]}, "2026-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.75, 15.0], [119.85, 15.25], [119.75, 15.5], [119.97, 16.03], [120.32, 16.18], [120.35, 16.25], [120.25, 16.5], [120.35, 16.75], [120.25, 17.0], [120.35, 17.25], [120.25, 17.5], [120.47, 18.03], [121.0, 18.25], [121.25, 18.15], [121.5, 18.25], [121.75, 18.15], [122.0, 18.25], [122.53, 18.03], [122.75, 17.5], [122.65, 17.25], [122.75, 17.0], [122.65, 16.75], [122.75, 16.5], [122.53, 15.97], [122.18, 15.82], [122.03, 15.47], [121.68, 15.32], [121.65, 15.25], [121.75, 15.0], [121.65, 14.75], [121.75, 14.5], [121.53, 13.97], [121.0, 13.75], [120.75, 13.85], [120.5, 13.75], [119.97, 13.97], [119.75, 14.5], [119.85, 14.75], [119.75, 15.0]]]]}, "2026-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.75, 15.5], [119.97, 16.03], [120.32, 16.18], [120.46, 16.5], [120.25, 17.0], [120.47, 17.53], [121.0, 17.75], [121.53, 17.53], [121.75, 17.0], [121.54, 16.5], [121.75, 16.0], [121.65, 15.75], [121.75, 15.5], [121.53, 14.97], [121.18, 14.82], [121.03, 14.47], [120.5, 14.25], [119.97, 14.47], [119.75, 15.0], [119.85, 15.25], [119.75, 15.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.005242845894145}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0415117968514465}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.775610678536566, 20.435918172200502, 20.203944651285838, 20.5684824625651, 20.8662129720052]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.739245351155603, 14.138579305013025, 13.890602366129599, 14.13746032714846, 14.657830810546898]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.1060101449565303, -2.024291707357844, -2.229441148278363, -1.8671970336981114, -1.7010236638839615]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.9831526614723884, -2.9401916330250515, -3.005242845894145, -2.466670307292816, -1.8847480892451358]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5873761858210624, -1.6847317245117133, -1.8493007702399193, -1.585904687158669, -1.467784866192185]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.908549949373843, -2.127938499260368, -2.2309352151669706, -1.8748740837657534, -1.712844792731534]}}