{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:19.750860", "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": "2023-Jan-15_to_2023-Jan-18_110.5_22.0"}, "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": 2023010000738}, "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 15 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 18 2023"}, "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": 103217.32347977966}, "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": ["China"]}, "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": ["South China 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": 22.0}, "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": 110.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "110.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 108.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 112.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 23.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[109.25, 22.5], [109.35, 22.75], [109.25, 23.0], [109.35, 23.25], [109.25, 23.5], [109.47, 24.03], [110.0, 24.25], [110.25, 24.15], [110.5, 24.25], [110.75, 24.15], [111.0, 24.25], [111.25, 24.15], [111.5, 24.25], [111.75, 24.15], [112.0, 24.25], [112.25, 24.15], [112.5, 24.25], [113.03, 24.03], [113.25, 23.5], [113.03, 22.97], [112.68, 22.82], [112.53, 22.47], [112.18, 22.32], [112.03, 21.97], [111.68, 21.82], [111.65, 21.75], [111.75, 21.5], [111.53, 20.97], [111.18, 20.82], [111.03, 20.47], [110.68, 20.32], [110.53, 19.97], [110.0, 19.75], [109.5, 19.96], [109.18, 19.82], [109.03, 19.47], [108.5, 19.25], [108.25, 19.35], [108.0, 19.25], [107.47, 19.47], [107.25, 20.0], [107.35, 20.25], [107.25, 20.5], [107.35, 20.75], [107.25, 21.0], [107.47, 21.53], [107.82, 21.68], [107.97, 22.03], [108.5, 22.25], [108.75, 22.15], [109.0, 22.25], [109.25, 22.15], [109.32, 22.18], [109.35, 22.25], [109.25, 22.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "S.E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.25, 20.5], [107.35, 20.75], [107.25, 21.0], [107.47, 21.53], [107.82, 21.68], [107.97, 22.03], [108.5, 22.25], [108.75, 22.15], [109.0, 22.25], [109.25, 22.15], [109.32, 22.18], [109.35, 22.25], [109.25, 22.5], [109.35, 22.75], [109.25, 23.0], [109.35, 23.25], [109.25, 23.5], [109.47, 24.03], [110.0, 24.25], [110.25, 24.15], [110.5, 24.25], [110.75, 24.15], [111.0, 24.25], [111.25, 24.15], [111.5, 24.25], [111.75, 24.15], [112.0, 24.25], [112.25, 24.15], [112.5, 24.25], [113.03, 24.03], [113.25, 23.5], [113.03, 22.97], [112.68, 22.82], [112.53, 22.47], [112.18, 22.32], [112.03, 21.97], [111.5, 21.75], [111.25, 21.85], [111.18, 21.82], [111.03, 21.47], [110.5, 21.25], [110.25, 21.35], [110.18, 21.32], [110.15, 21.25], [110.25, 21.0], [110.03, 20.47], [109.68, 20.32], [109.53, 19.97], [109.18, 19.82], [109.03, 19.47], [108.5, 19.25], [108.25, 19.35], [108.0, 19.25], [107.47, 19.47], [107.25, 20.0], [107.35, 20.25], [107.25, 20.5]]]]}, "2023-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.25, 20.5], [107.35, 20.75], [107.25, 21.0], [107.47, 21.53], [107.82, 21.68], [107.97, 22.03], [108.5, 22.25], [108.75, 22.15], [109.0, 22.25], [109.25, 22.15], [109.32, 22.18], [109.35, 22.25], [109.25, 22.5], [109.35, 22.75], [109.25, 23.0], [109.35, 23.25], [109.25, 23.5], [109.47, 24.03], [110.0, 24.25], [110.25, 24.15], [110.5, 24.25], [110.75, 24.15], [111.0, 24.25], [111.25, 24.15], [111.5, 24.25], [111.75, 24.15], [112.0, 24.25], [112.25, 24.15], [112.5, 24.25], [113.03, 24.03], [113.25, 23.5], [113.03, 22.97], [112.68, 22.82], [112.53, 22.47], [112.18, 22.32], [112.03, 21.97], [111.68, 21.82], [111.65, 21.75], [111.75, 21.5], [111.53, 20.97], [111.18, 20.82], [111.03, 20.47], [110.68, 20.32], [110.53, 19.97], [110.0, 19.75], [109.5, 19.96], [109.18, 19.82], [109.03, 19.47], [108.5, 19.25], [108.25, 19.35], [108.0, 19.25], [107.47, 19.47], [107.25, 20.0], [107.35, 20.25], [107.25, 20.5]]]]}, "2023-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.25, 20.5], [107.35, 20.75], [107.25, 21.0], [107.47, 21.53], [107.82, 21.68], [107.97, 22.03], [108.5, 22.25], [108.75, 22.15], [109.0, 22.25], [109.25, 22.15], [109.32, 22.18], [109.35, 22.25], [109.25, 22.5], [109.35, 22.75], [109.25, 23.0], [109.35, 23.25], [109.25, 23.5], [109.47, 24.03], [110.0, 24.25], [110.25, 24.15], [110.5, 24.25], [110.75, 24.15], [111.0, 24.25], [111.25, 24.15], [111.5, 24.25], [111.75, 24.15], [112.0, 24.25], [112.25, 24.15], [112.5, 24.25], [113.03, 24.03], [113.25, 23.5], [113.03, 22.97], [112.68, 22.82], [112.53, 22.47], [112.18, 22.32], [112.03, 21.97], [111.68, 21.82], [111.65, 21.75], [111.75, 21.5], [111.53, 20.97], [111.18, 20.82], [111.03, 20.47], [110.68, 20.32], [110.53, 19.97], [110.0, 19.75], [109.5, 19.96], [109.18, 19.82], [109.03, 19.47], [108.5, 19.25], [108.25, 19.35], [108.0, 19.25], [107.47, 19.47], [107.25, 20.0], [107.35, 20.25], [107.25, 20.5]]]]}, "2023-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.25, 21.0], [109.35, 21.25], [109.25, 21.5], [109.35, 21.75], [109.25, 22.0], [109.47, 22.53], [109.82, 22.68], [109.97, 23.03], [110.5, 23.25], [111.03, 23.03], [111.18, 22.68], [111.53, 22.53], [111.75, 22.0], [111.65, 21.75], [111.75, 21.5], [111.53, 20.97], [111.18, 20.82], [111.03, 20.47], [110.68, 20.32], [110.53, 19.97], [110.0, 19.75], [109.47, 19.97], [109.25, 20.5], [109.35, 20.75], [109.25, 21.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.890135019580498}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.530726776756093}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.127269710557357, 8.880599089332406, 9.467701155004306, 11.068315567655361]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.098674765139606, 4.817335060097946, 5.179254428364345, 8.629595517138]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.610880759861608, -6.243209154824003, -5.690999540159916, -5.056361716451886]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.198096117861667, -7.890135019580498, -7.644638057256316, -5.756034640525854]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5645646265384272, -2.090895733669024, -1.8633818939621338, -1.5300693649620727]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8888286189196701, -2.3097077953938316, -2.390644815412623, -1.7388089252826964]}}