{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:04.954610", "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": "2018-Feb-09_to_2018-Feb-11_95.0_37.5"}, "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": 2018020000386}, "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": "February 09 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 11 2018"}, "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": 61337.965732453406}, "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.C.Asia", "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": 37.5}, "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": 95.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "95.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 91.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 97.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-02-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[91.47, 37.47], [91.25, 38.0], [91.47, 38.53], [92.0, 38.75], [92.25, 38.65], [92.32, 38.68], [92.47, 39.03], [93.0, 39.25], [93.25, 39.15], [93.5, 39.25], [94.03, 39.03], [94.18, 38.68], [94.25, 38.65], [94.5, 38.75], [95.03, 38.53], [95.18, 38.18], [95.25, 38.15], [95.5, 38.25], [95.75, 38.15], [96.0, 38.25], [96.53, 38.03], [96.68, 37.68], [96.75, 37.65], [97.0, 37.75], [97.25, 37.65], [97.5, 37.75], [98.03, 37.53], [98.25, 37.0], [98.15, 36.75], [98.25, 36.5], [98.03, 35.97], [97.5, 35.75], [97.25, 35.85], [97.0, 35.75], [96.47, 35.97], [96.32, 36.32], [96.25, 36.35], [96.0, 36.25], [95.75, 36.35], [95.5, 36.25], [95.25, 36.35], [95.0, 36.25], [94.75, 36.35], [94.5, 36.25], [94.25, 36.35], [94.0, 36.25], [93.47, 36.47], [93.32, 36.82], [93.25, 36.85], [93.0, 36.75], [92.47, 36.97], [92.32, 37.32], [92.25, 37.35], [92.0, 37.25], [91.47, 37.47]]]]}, "2018-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[91.47, 37.47], [91.25, 38.0], [91.47, 38.53], [92.0, 38.75], [92.25, 38.65], [92.32, 38.68], [92.47, 39.03], [93.0, 39.25], [93.25, 39.15], [93.5, 39.25], [94.03, 39.03], [94.18, 38.68], [94.25, 38.65], [94.5, 38.75], [95.03, 38.53], [95.18, 38.18], [95.25, 38.15], [95.5, 38.25], [95.75, 38.15], [96.0, 38.25], [96.53, 38.03], [96.68, 37.68], [96.75, 37.65], [97.0, 37.75], [97.25, 37.65], [97.5, 37.75], [98.03, 37.53], [98.25, 37.0], [98.15, 36.75], [98.25, 36.5], [98.03, 35.97], [97.5, 35.75], [97.25, 35.85], [97.0, 35.75], [96.47, 35.97], [96.32, 36.32], [96.25, 36.35], [96.0, 36.25], [95.75, 36.35], [95.5, 36.25], [95.25, 36.35], [95.0, 36.25], [94.75, 36.35], [94.5, 36.25], [94.25, 36.35], [94.0, 36.25], [93.47, 36.47], [93.32, 36.82], [93.25, 36.85], [93.0, 36.75], [92.47, 36.97], [92.32, 37.32], [92.25, 37.35], [92.0, 37.25], [91.47, 37.47]]]]}, "2018-02-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[91.47, 37.47], [91.25, 38.0], [91.47, 38.53], [92.0, 38.75], [92.25, 38.65], [92.32, 38.68], [92.47, 39.03], [93.0, 39.25], [93.25, 39.15], [93.5, 39.25], [94.03, 39.03], [94.18, 38.68], [94.25, 38.65], [94.5, 38.75], [95.03, 38.53], [95.18, 38.18], [95.25, 38.15], [95.5, 38.25], [95.75, 38.15], [96.0, 38.25], [96.53, 38.03], [96.68, 37.68], [96.75, 37.65], [97.0, 37.75], [97.25, 37.65], [97.5, 37.75], [98.03, 37.53], [98.25, 37.0], [98.15, 36.75], [98.25, 36.5], [98.03, 35.97], [97.5, 35.75], [97.25, 35.85], [97.0, 35.75], [96.47, 35.97], [96.32, 36.32], [96.25, 36.35], [96.0, 36.25], [95.75, 36.35], [95.5, 36.25], [95.25, 36.35], [95.0, 36.25], [94.75, 36.35], [94.5, 36.25], [94.25, 36.35], [94.0, 36.25], [93.47, 36.47], [93.32, 36.82], [93.25, 36.85], [93.0, 36.75], [92.47, 36.97], [92.32, 37.32], [92.25, 37.35], [92.0, 37.25], [91.47, 37.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.606908421305548}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.013127126470338}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-12.449000333292133, -12.44108606856895, -10.469498830313341]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-17.57881621271713, -16.782393361159052, -14.096339879367179]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.582833789521278, -6.672277357563043, -4.784270232326694]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.606908421305548, -8.074237614139975, -5.763924849352293]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9449363158440607, -2.0302788790623127, -1.50173898296532]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.380001414948578, -2.3323048924711802, -1.8226784882329399]}}