{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:14.503238", "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-May-19_to_2023-May-21_108.5_42.5"}, "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": 2023050000593}, "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": "May 19 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 21 2023"}, "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": 122775.97574889676}, "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", "Mongolia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": 42.5}, "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": 108.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "108.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 107.5}, "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": 41.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[106.97, 43.53], [107.32, 43.68], [107.35, 43.75], [107.25, 44.0], [107.47, 44.53], [108.0, 44.75], [108.25, 44.65], [108.5, 44.75], [108.75, 44.65], [109.0, 44.75], [109.25, 44.65], [109.5, 44.75], [109.75, 44.65], [110.0, 44.75], [110.25, 44.65], [110.5, 44.75], [110.75, 44.65], [111.0, 44.75], [111.25, 44.65], [111.5, 44.75], [112.03, 44.53], [112.25, 44.0], [112.15, 43.75], [112.25, 43.5], [112.15, 43.25], [112.18, 43.18], [112.53, 43.03], [112.68, 42.68], [113.03, 42.53], [113.25, 42.0], [113.03, 41.47], [112.68, 41.32], [112.53, 40.97], [112.0, 40.75], [111.75, 40.85], [111.5, 40.75], [111.25, 40.85], [111.0, 40.75], [110.75, 40.85], [110.5, 40.75], [110.25, 40.85], [110.18, 40.82], [110.03, 40.47], [109.5, 40.25], [109.25, 40.35], [109.0, 40.25], [108.75, 40.35], [108.5, 40.25], [107.97, 40.47], [107.75, 41.0], [107.85, 41.25], [107.75, 41.5], [107.85, 41.75], [107.82, 41.82], [107.47, 41.97], [107.32, 42.32], [106.97, 42.47], [106.75, 43.0], [106.97, 43.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.97, 42.47], [106.75, 43.0], [106.97, 43.53], [107.32, 43.68], [107.35, 43.75], [107.25, 44.0], [107.47, 44.53], [108.0, 44.75], [108.25, 44.65], [108.5, 44.75], [108.75, 44.65], [109.0, 44.75], [109.25, 44.65], [109.5, 44.75], [109.75, 44.65], [110.0, 44.75], [110.25, 44.65], [110.5, 44.75], [110.75, 44.65], [111.0, 44.75], [111.25, 44.65], [111.5, 44.75], [112.03, 44.53], [112.25, 44.0], [112.15, 43.75], [112.25, 43.5], [112.15, 43.25], [112.18, 43.18], [112.53, 43.03], [112.68, 42.68], [113.03, 42.53], [113.25, 42.0], [113.03, 41.47], [112.68, 41.32], [112.53, 40.97], [112.0, 40.75], [111.75, 40.85], [111.5, 40.75], [111.25, 40.85], [111.0, 40.75], [110.75, 40.85], [110.5, 40.75], [110.25, 40.85], [110.18, 40.82], [110.03, 40.47], [109.5, 40.25], [109.25, 40.35], [109.0, 40.25], [108.75, 40.35], [108.5, 40.25], [107.97, 40.47], [107.75, 41.0], [107.85, 41.25], [107.75, 41.5], [107.85, 41.75], [107.82, 41.82], [107.47, 41.97], [107.32, 42.32], [106.97, 42.47]]]]}, "2023-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.97, 42.47], [106.75, 43.0], [106.97, 43.53], [107.32, 43.68], [107.35, 43.75], [107.25, 44.0], [107.47, 44.53], [108.0, 44.75], [108.25, 44.65], [108.5, 44.75], [108.75, 44.65], [109.0, 44.75], [109.25, 44.65], [109.5, 44.75], [109.75, 44.65], [110.0, 44.75], [110.25, 44.65], [110.5, 44.75], [110.75, 44.65], [111.0, 44.75], [111.25, 44.65], [111.5, 44.75], [112.03, 44.53], [112.25, 44.0], [112.15, 43.75], [112.25, 43.5], [112.15, 43.25], [112.18, 43.18], [112.53, 43.03], [112.68, 42.68], [113.03, 42.53], [113.25, 42.0], [113.03, 41.47], [112.68, 41.32], [112.53, 40.97], [112.0, 40.75], [111.75, 40.85], [111.5, 40.75], [111.25, 40.85], [111.0, 40.75], [110.75, 40.85], [110.5, 40.75], [110.25, 40.85], [110.18, 40.82], [110.03, 40.47], [109.5, 40.25], [109.25, 40.35], [109.0, 40.25], [108.75, 40.35], [108.5, 40.25], [107.97, 40.47], [107.75, 41.0], [107.85, 41.25], [107.75, 41.5], [107.85, 41.75], [107.82, 41.82], [107.47, 41.97], [107.32, 42.32], [106.97, 42.47]]]]}, "2023-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.97, 42.47], [106.75, 43.0], [106.97, 43.53], [107.32, 43.68], [107.35, 43.75], [107.25, 44.0], [107.47, 44.53], [108.0, 44.75], [108.25, 44.65], [108.5, 44.75], [108.75, 44.65], [109.0, 44.75], [109.25, 44.65], [109.5, 44.75], [109.75, 44.65], [110.0, 44.75], [110.25, 44.65], [110.5, 44.75], [110.75, 44.65], [111.0, 44.75], [111.25, 44.65], [111.5, 44.75], [112.03, 44.53], [112.25, 44.0], [112.15, 43.75], [112.25, 43.5], [112.15, 43.25], [112.18, 43.18], [112.53, 43.03], [112.68, 42.68], [113.03, 42.53], [113.25, 42.0], [113.03, 41.47], [112.68, 41.32], [112.53, 40.97], [112.0, 40.75], [111.75, 40.85], [111.5, 40.75], [111.25, 40.85], [111.0, 40.75], [110.75, 40.85], [110.5, 40.75], [110.25, 40.85], [110.18, 40.82], [110.03, 40.47], [109.5, 40.25], [109.25, 40.35], [109.0, 40.25], [108.75, 40.35], [108.5, 40.25], [107.97, 40.47], [107.75, 41.0], [107.85, 41.25], [107.75, 41.5], [107.85, 41.75], [107.82, 41.82], [107.47, 41.97], [107.32, 42.32], [106.97, 42.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.771812048585957}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.5452529029273565}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.394302834998882, 8.84754454435597, 10.267208503356528]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.306670234450564, 5.3896231969906125, 6.640199201666917]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.04513427363216, -7.887131250578144, -6.703493184571763]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.771812048585957, -9.089814959031912, -7.912525870093589]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8182599882485382, -1.7707048817052864, -1.4533816558967805]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.081875098898834, -1.9095881686668341, -1.616565143918133]}}