{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:12:47.279135", "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": "2021-Aug-13_to_2021-Aug-15_110.5_30.0"}, "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": 2021080000683}, "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": "August 13 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 15 2021"}, "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": 67265.66293347177}, "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": 30.0}, "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": 108.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 111.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[108.32, 30.18], [108.47, 30.53], [108.82, 30.68], [108.97, 31.03], [109.5, 31.25], [109.75, 31.15], [110.0, 31.25], [110.25, 31.15], [110.5, 31.25], [110.75, 31.15], [111.0, 31.25], [111.25, 31.15], [111.5, 31.25], [112.03, 31.03], [112.25, 30.5], [112.03, 29.97], [111.68, 29.82], [111.65, 29.75], [111.75, 29.5], [111.53, 28.97], [111.0, 28.75], [110.75, 28.85], [110.68, 28.82], [110.65, 28.75], [110.75, 28.5], [110.65, 28.25], [110.75, 28.0], [110.53, 27.47], [110.0, 27.25], [109.75, 27.35], [109.5, 27.25], [108.97, 27.47], [108.82, 27.82], [108.47, 27.97], [108.32, 28.32], [107.97, 28.47], [107.75, 29.0], [107.85, 29.25], [107.75, 29.5], [107.97, 30.03], [108.32, 30.18]]]]}}, "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": {"2021-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.75, 29.5], [107.97, 30.03], [108.32, 30.18], [108.47, 30.53], [108.82, 30.68], [108.97, 31.03], [109.5, 31.25], [109.75, 31.15], [110.0, 31.25], [110.25, 31.15], [110.5, 31.25], [110.75, 31.15], [111.0, 31.25], [111.25, 31.15], [111.5, 31.25], [112.03, 31.03], [112.25, 30.5], [112.03, 29.97], [111.68, 29.82], [111.65, 29.75], [111.75, 29.5], [111.53, 28.97], [111.0, 28.75], [110.75, 28.85], [110.68, 28.82], [110.65, 28.75], [110.75, 28.5], [110.65, 28.25], [110.75, 28.0], [110.53, 27.47], [110.0, 27.25], [109.75, 27.35], [109.5, 27.25], [108.97, 27.47], [108.82, 27.82], [108.47, 27.97], [108.32, 28.32], [107.97, 28.47], [107.75, 29.0], [107.85, 29.25], [107.75, 29.5]]]]}, "2021-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.75, 29.5], [107.97, 30.03], [108.32, 30.18], [108.47, 30.53], [108.82, 30.68], [108.97, 31.03], [109.5, 31.25], [109.75, 31.15], [110.0, 31.25], [110.25, 31.15], [110.5, 31.25], [110.75, 31.15], [111.0, 31.25], [111.25, 31.15], [111.5, 31.25], [112.03, 31.03], [112.25, 30.5], [112.03, 29.97], [111.68, 29.82], [111.65, 29.75], [111.75, 29.5], [111.53, 28.97], [111.0, 28.75], [110.75, 28.85], [110.68, 28.82], [110.65, 28.75], [110.75, 28.5], [110.65, 28.25], [110.75, 28.0], [110.53, 27.47], [110.0, 27.25], [109.75, 27.35], [109.5, 27.25], [108.97, 27.47], [108.82, 27.82], [108.47, 27.97], [108.32, 28.32], [107.97, 28.47], [107.75, 29.0], [107.85, 29.25], [107.75, 29.5]]]]}, "2021-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.75, 29.5], [107.97, 30.03], [108.32, 30.18], [108.47, 30.53], [108.82, 30.68], [108.97, 31.03], [109.5, 31.25], [109.75, 31.15], [110.0, 31.25], [110.25, 31.15], [110.5, 31.25], [110.75, 31.15], [111.0, 31.25], [111.25, 31.15], [111.5, 31.25], [112.03, 31.03], [112.25, 30.5], [112.03, 29.97], [111.68, 29.82], [111.65, 29.75], [111.75, 29.5], [111.53, 28.97], [111.0, 28.75], [110.75, 28.85], [110.68, 28.82], [110.65, 28.75], [110.75, 28.5], [110.65, 28.25], [110.75, 28.0], [110.53, 27.47], [110.0, 27.25], [109.75, 27.35], [109.5, 27.25], [108.97, 27.47], [108.82, 27.82], [108.47, 27.97], [108.32, 28.32], [107.97, 28.47], [107.75, 29.0], [107.85, 29.25], [107.75, 29.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.008457771444171}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.312237042722789}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.07899367324501, 20.25538745286326, 21.41401060349932]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.9459876108524, 18.01486813108062, 18.915354932111825]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.30052941140114, -4.968153283243874, -3.6680284335233546]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.866255523661437, -6.008457771444171, -4.123909910454415]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8506807619961703, -2.1490029307709824, -1.6458337181875502]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.245423011178428, -2.437495449590589, -1.7710715588557606]}}