{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:47.439731", "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": "2015-Apr-23_to_2015-Apr-26_92.0_34.5"}, "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": 2015040000876}, "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": "April 23 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 26 2015"}, "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": 190264.85706622803}, "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": ["Tibetan-Plateau"]}, "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": 34.5}, "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": 92.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "92.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 87.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 96.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[87.25, 36.5], [87.47, 37.03], [88.0, 37.25], [88.5, 37.04], [88.82, 37.18], [88.97, 37.53], [89.5, 37.75], [89.75, 37.65], [90.0, 37.75], [90.25, 37.65], [90.5, 37.75], [90.75, 37.65], [91.0, 37.75], [91.53, 37.53], [91.68, 37.18], [91.75, 37.15], [92.0, 37.25], [92.53, 37.03], [92.75, 36.5], [92.65, 36.25], [92.68, 36.18], [93.03, 36.03], [93.25, 35.5], [93.15, 35.25], [93.25, 35.0], [93.15, 34.75], [93.25, 34.5], [93.03, 33.97], [92.63, 33.8], [92.75, 33.5], [92.65, 33.25], [92.75, 33.0], [92.53, 32.47], [92.18, 32.32], [92.03, 31.97], [91.5, 31.75], [90.97, 31.97], [90.82, 32.32], [90.75, 32.35], [90.5, 32.25], [89.97, 32.47], [89.75, 33.0], [89.88, 33.3], [89.5, 33.46], [89.0, 33.25], [88.47, 33.47], [88.25, 34.0], [88.38, 34.3], [87.97, 34.47], [87.8, 34.88], [87.5, 34.75], [86.97, 34.97], [86.75, 35.5], [86.97, 36.03], [87.32, 36.18], [87.35, 36.25], [87.25, 36.5]]]]}, "2015-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[87.25, 36.5], [87.47, 37.03], [88.0, 37.25], [88.5, 37.04], [88.82, 37.18], [88.97, 37.53], [89.5, 37.75], [89.75, 37.65], [90.0, 37.75], [90.25, 37.65], [90.5, 37.75], [90.75, 37.65], [91.0, 37.75], [91.53, 37.53], [91.68, 37.18], [91.75, 37.15], [92.0, 37.25], [92.53, 37.03], [92.75, 36.5], [92.65, 36.25], [92.68, 36.18], [93.03, 36.03], [93.25, 35.5], [93.15, 35.25], [93.25, 35.0], [93.15, 34.75], [93.25, 34.5], [93.47, 35.03], [93.82, 35.18], [93.97, 35.53], [94.5, 35.75], [94.75, 35.65], [95.0, 35.75], [95.25, 35.65], [95.5, 35.75], [95.75, 35.65], [96.0, 35.75], [96.53, 35.53], [96.68, 35.18], [97.03, 35.03], [97.25, 34.5], [97.03, 33.97], [96.68, 33.82], [96.53, 33.47], [96.0, 33.25], [95.75, 33.35], [95.5, 33.25], [95.25, 33.35], [95.18, 33.32], [95.03, 32.97], [94.68, 32.82], [94.53, 32.47], [94.0, 32.25], [93.5, 32.46], [93.0, 32.25], [92.57, 32.43], [92.75, 32.0], [92.53, 31.47], [92.0, 31.25], [91.47, 31.47], [91.32, 31.82], [90.97, 31.97], [90.82, 32.32], [90.75, 32.35], [90.5, 32.25], [89.97, 32.47], [89.75, 33.0], [89.88, 33.3], [89.5, 33.46], [89.0, 33.25], [88.47, 33.47], [88.25, 34.0], [88.38, 34.3], [87.97, 34.47], [87.8, 34.88], [87.5, 34.75], [86.97, 34.97], [86.75, 35.5], [86.97, 36.03], [87.32, 36.18], [87.35, 36.25], [87.25, 36.5]], [[93.13, 34.2], [93.25, 34.15], [93.32, 34.18], [93.35, 34.25], [93.25, 34.5], [93.13, 34.2]]]]}, "2015-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[87.25, 36.5], [87.47, 37.03], [88.0, 37.25], [88.5, 37.04], [88.82, 37.18], [88.97, 37.53], [89.5, 37.75], [89.75, 37.65], [90.0, 37.75], [90.25, 37.65], [90.5, 37.75], [90.75, 37.65], [91.0, 37.75], [91.53, 37.53], [91.68, 37.18], [91.75, 37.15], [92.0, 37.25], [92.53, 37.03], [92.75, 36.5], [92.65, 36.25], [92.68, 36.18], [93.03, 36.03], [93.25, 35.5], [93.15, 35.25], [93.25, 35.0], [93.15, 34.75], [93.25, 34.5], [93.47, 35.03], [93.82, 35.18], [93.97, 35.53], [94.5, 35.75], [94.75, 35.65], [95.0, 35.75], [95.25, 35.65], [95.5, 35.75], [95.75, 35.65], [96.0, 35.75], [96.53, 35.53], [96.68, 35.18], [97.03, 35.03], [97.25, 34.5], [97.03, 33.97], [96.68, 33.82], [96.53, 33.47], [96.0, 33.25], [95.75, 33.35], [95.5, 33.25], [95.25, 33.35], [95.18, 33.32], [95.03, 32.97], [94.68, 32.82], [94.53, 32.47], [94.0, 32.25], [93.5, 32.46], [93.0, 32.25], [92.57, 32.43], [92.75, 32.0], [92.53, 31.47], [92.0, 31.25], [91.47, 31.47], [91.32, 31.82], [90.97, 31.97], [90.82, 32.32], [90.75, 32.35], [90.5, 32.25], [89.97, 32.47], [89.75, 33.0], [89.88, 33.3], [89.5, 33.46], [89.0, 33.25], [88.47, 33.47], [88.25, 34.0], [88.38, 34.3], [87.97, 34.47], [87.8, 34.88], [87.5, 34.75], [86.97, 34.97], [86.75, 35.5], [86.97, 36.03], [87.32, 36.18], [87.35, 36.25], [87.25, 36.5]], [[93.13, 34.2], [93.25, 34.15], [93.32, 34.18], [93.35, 34.25], [93.25, 34.5], [93.13, 34.2]]]]}, "2015-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.47, 34.03], [90.82, 34.18], [90.97, 34.53], [91.32, 34.68], [91.47, 35.03], [92.0, 35.25], [92.53, 35.03], [92.75, 34.5], [92.63, 34.2], [92.75, 34.15], [93.0, 34.25], [93.25, 34.15], [93.32, 34.18], [93.35, 34.25], [93.25, 34.5], [93.47, 35.03], [93.82, 35.18], [93.97, 35.53], [94.5, 35.75], [94.75, 35.65], [95.0, 35.75], [95.25, 35.65], [95.5, 35.75], [95.75, 35.65], [96.0, 35.75], [96.53, 35.53], [96.68, 35.18], [97.03, 35.03], [97.25, 34.5], [97.03, 33.97], [96.68, 33.82], [96.53, 33.47], [96.0, 33.25], [95.75, 33.35], [95.5, 33.25], [95.25, 33.35], [95.18, 33.32], [95.03, 32.97], [94.68, 32.82], [94.53, 32.47], [94.0, 32.25], [93.5, 32.46], [93.0, 32.25], [92.57, 32.43], [92.75, 32.0], [92.53, 31.47], [92.0, 31.25], [91.47, 31.47], [91.32, 31.82], [90.97, 31.97], [90.75, 32.5], [90.85, 32.75], [90.82, 32.82], [90.47, 32.97], [90.25, 33.5], [90.47, 34.03]]], [[[88.97, 37.53], [89.5, 37.75], [90.0, 37.54], [90.5, 37.75], [91.03, 37.53], [91.2, 37.13], [91.5, 37.25], [92.03, 37.03], [92.25, 36.5], [92.03, 35.97], [91.5, 35.75], [91.2, 35.88], [91.03, 35.47], [90.5, 35.25], [90.25, 35.35], [90.0, 35.25], [89.75, 35.35], [89.5, 35.25], [88.97, 35.47], [88.82, 35.82], [88.7, 35.88], [88.53, 35.47], [88.0, 35.25], [87.47, 35.47], [87.25, 36.0], [87.47, 36.53], [88.0, 36.75], [88.3, 36.63], [88.47, 37.03], [88.82, 37.18], [88.97, 37.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.384258034552715}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.310440878756122}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-14.261187998679247, -13.58810599976556, -13.555848302930599, -12.907915949244853]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-17.585453077268, -17.76673591618848, -19.121782491455974, -18.00198490390656]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.4262859889479165, -6.23448386523868, -6.347767125320178, -6.242657881734286]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.395217693793882, -8.434819950885469, -8.788483031440535, -9.384258034552715]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6813473002220027, -1.6920769158383067, -1.7664617845672963, -1.7696657606309374]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.191625347093605, -2.3219262578821125, -2.2245978025755058, -2.38424857813414]}}