{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:20:19.564950", "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": "2019-Aug-30_to_2019-Sep-04_111.5_21.0"}, "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": 2019080000862}, "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 30 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 04 2019"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 57892.3435549482}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "S.E.Asia"]}, "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": 21.0}, "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": 111.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "111.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 109.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 113.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.97, 21.53], [111.5, 21.75], [111.75, 21.65], [111.82, 21.68], [111.97, 22.03], [112.5, 22.25], [112.75, 22.15], [113.0, 22.25], [113.25, 22.15], [113.5, 22.25], [114.03, 22.03], [114.25, 21.5], [114.15, 21.25], [114.25, 21.0], [114.03, 20.47], [113.5, 20.25], [113.25, 20.35], [113.18, 20.32], [113.03, 19.97], [112.5, 19.75], [112.0, 19.96], [111.5, 19.75], [110.97, 19.97], [110.75, 20.5], [110.85, 20.75], [110.75, 21.0], [110.97, 21.53]]]]}, "2019-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.97, 20.47], [109.75, 21.0], [109.97, 21.53], [110.5, 21.75], [110.75, 21.65], [111.0, 21.75], [111.25, 21.65], [111.5, 21.75], [111.75, 21.65], [111.82, 21.68], [111.97, 22.03], [112.5, 22.25], [112.75, 22.15], [113.0, 22.25], [113.25, 22.15], [113.5, 22.25], [114.03, 22.03], [114.25, 21.5], [114.15, 21.25], [114.25, 21.0], [114.03, 20.47], [113.5, 20.25], [113.25, 20.35], [113.18, 20.32], [113.03, 19.97], [112.5, 19.75], [112.0, 19.96], [111.5, 19.75], [110.97, 19.97], [110.82, 20.32], [110.75, 20.35], [110.5, 20.25], [109.97, 20.47]]]]}, "2019-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.35, 19.75], [109.25, 20.0], [109.47, 20.53], [109.88, 20.7], [109.75, 21.0], [109.97, 21.53], [110.5, 21.75], [110.75, 21.65], [111.0, 21.75], [111.25, 21.65], [111.5, 21.75], [111.75, 21.65], [111.82, 21.68], [111.97, 22.03], [112.5, 22.25], [112.75, 22.15], [113.0, 22.25], [113.25, 22.15], [113.5, 22.25], [114.03, 22.03], [114.25, 21.5], [114.15, 21.25], [114.25, 21.0], [114.03, 20.47], [113.5, 20.25], [113.25, 20.35], [113.18, 20.32], [113.03, 19.97], [112.5, 19.75], [112.0, 19.96], [111.68, 19.82], [111.65, 19.75], [111.75, 19.5], [111.53, 18.97], [111.0, 18.75], [110.75, 18.85], [110.68, 18.82], [110.53, 18.47], [110.0, 18.25], [109.47, 18.47], [109.25, 19.0], [109.35, 19.25], [109.25, 19.5], [109.35, 19.75]]]]}, "2019-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.35, 19.75], [109.25, 20.0], [109.47, 20.53], [109.88, 20.7], [109.75, 21.0], [109.97, 21.53], [110.5, 21.75], [110.75, 21.65], [111.0, 21.75], [111.25, 21.65], [111.5, 21.75], [111.75, 21.65], [111.82, 21.68], [111.97, 22.03], [112.5, 22.25], [112.75, 22.15], [113.0, 22.25], [113.53, 22.03], [113.75, 21.5], [113.53, 20.97], [113.18, 20.82], [113.03, 20.47], [112.5, 20.25], [112.25, 20.35], [112.0, 20.25], [111.75, 20.35], [111.68, 20.32], [111.65, 20.25], [111.75, 20.0], [111.65, 19.75], [111.75, 19.5], [111.53, 18.97], [111.0, 18.75], [110.75, 18.85], [110.68, 18.82], [110.53, 18.47], [110.0, 18.25], [109.47, 18.47], [109.25, 19.0], [109.35, 19.25], [109.25, 19.5], [109.35, 19.75]]]]}, "2019-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.35, 19.75], [109.25, 20.0], [109.47, 20.53], [110.0, 20.75], [110.25, 20.65], [110.32, 20.68], [110.47, 21.03], [110.82, 21.18], [110.97, 21.53], [111.5, 21.75], [111.75, 21.65], [112.0, 21.75], [112.25, 21.65], [112.32, 21.68], [112.47, 22.03], [113.0, 22.25], [113.53, 22.03], [113.75, 21.5], [113.53, 20.97], [113.18, 20.82], [113.03, 20.47], [112.5, 20.25], [112.25, 20.35], [112.0, 20.25], [111.75, 20.35], [111.68, 20.32], [111.65, 20.25], [111.75, 20.0], [111.65, 19.75], [111.75, 19.5], [111.53, 18.97], [111.0, 18.75], [110.75, 18.85], [110.68, 18.82], [110.53, 18.47], [110.0, 18.25], [109.47, 18.47], [109.25, 19.0], [109.35, 19.25], [109.25, 19.5], [109.35, 19.75]]]]}, "2019-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[111.5, 21.75], [112.03, 21.53], [112.25, 21.0], [112.03, 20.47], [111.5, 20.25], [110.97, 20.47], [110.75, 21.0], [110.97, 21.53], [111.5, 21.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.2380597950377705}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.274306000270421}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.13221214094432, 27.026964506946456, 26.881119799888893, 26.60220824991734, 26.377769758600436, 26.99113953546515]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.98818920871804, 26.906370280647764, 24.903736109701583, 24.078939934072366, 23.93080473950249, 26.99113953546515]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1138668601434005, -1.2360973347131932, -1.185690758392417, -1.379643646560938, -1.4793261819178696, -1.069199351660302]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.2460298904618412, -1.5178881815151044, -1.3663996752820822, -2.116592579161704, -2.2380597950377705, -1.069199351660302]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4778220985614976, -1.5894774570486743, -1.4987769250578609, -1.660511089928032, -1.7526032324755272, -1.3407788324208278]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.633758995662334, -1.7548240343619974, -1.6946033745690237, -2.2152508387653733, -2.296360383855226, -1.3407788324208278]}}