{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:59:09.191011", "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": "2024-Jun-02_to_2024-Jun-04_109.0_30.5"}, "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": 2024060000140}, "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": "June 02 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 04 2024"}, "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": 211768.49009908366}, "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": []}, "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": 30.5}, "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": 109.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "109.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 103.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 110.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[103.5, 29.75], [103.75, 29.65], [104.0, 29.75], [104.3, 29.63], [104.35, 29.75], [104.25, 30.0], [104.35, 30.25], 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27.85], [103.5, 27.75], [102.97, 27.97], [102.75, 28.5], [102.85, 28.75], [102.75, 29.0], [102.97, 29.53], [103.5, 29.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-06-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[102.75, 29.0], [102.97, 29.53], [103.5, 29.75], [103.75, 29.65], [104.0, 29.75], [104.3, 29.63], [104.35, 29.75], [104.25, 30.0], [104.35, 30.25], [104.25, 30.5], [104.47, 31.03], [104.82, 31.18], [104.97, 31.53], [105.32, 31.68], [105.47, 32.03], [106.0, 32.25], [106.25, 32.15], [106.5, 32.25], [106.75, 32.15], [107.0, 32.25], [107.25, 32.15], [107.5, 32.25], [107.75, 32.15], [107.82, 32.18], [107.97, 32.53], [108.5, 32.75], [108.75, 32.65], [109.0, 32.75], [109.53, 32.53], [109.68, 32.18], [109.75, 32.15], [110.0, 32.25], [110.25, 32.15], 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27.35], [107.0, 27.25], [106.75, 27.35], [106.68, 27.32], [106.53, 26.97], [106.0, 26.75], [105.75, 26.85], [105.5, 26.75], [104.97, 26.97], [104.82, 27.32], [104.75, 27.35], [104.5, 27.25], [103.97, 27.47], [103.82, 27.82], [103.75, 27.85], [103.5, 27.75], [102.97, 27.97], [102.75, 28.5], [102.85, 28.75], [102.75, 29.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.454390605505466}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.175243357444223}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.304175975136957, 17.869722950963876, 17.644052293560662]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.395862821046705, 13.524098897372767, 11.772892745490424]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.6638386892678465, -4.289392192819376, -4.572499190245444]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.430663071224387, -5.211162270458544, -6.454390605505466]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5887991548726863, -1.8512889964976613, -2.0039855382031035]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.97647905644463, -2.234925623004648, -2.8658717795864974]}}