{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:01:21.774639", "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": "2024-Oct-19_to_2024-Oct-24_92.0_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": 2024100000391}, "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": "October 19 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 24 2024"}, "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": 51007.893330018866}, "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": 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": 91.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 94.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.0}, "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": [[[[91.75, 30.65], [92.0, 30.75], [92.25, 30.65], [92.32, 30.68], [92.47, 31.03], [93.0, 31.25], [93.25, 31.15], [93.5, 31.25], [93.75, 31.15], [94.0, 31.25], [94.53, 31.03], [94.75, 30.5], [94.65, 30.25], [94.75, 30.0], [94.65, 29.75], [94.75, 29.5], [94.53, 28.97], [94.18, 28.82], [94.03, 28.47], [93.5, 28.25], [93.25, 28.35], [93.0, 28.25], [92.75, 28.35], [92.5, 28.25], [92.25, 28.35], [92.0, 28.25], [91.47, 28.47], [91.32, 28.82], [90.97, 28.97], [90.75, 29.5], [90.85, 29.75], [90.75, 30.0], [90.97, 30.53], [91.5, 30.75], [91.75, 30.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-10-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.0, 29.25], [91.47, 29.47], [91.25, 30.0], [91.47, 30.53], [92.0, 30.75], [92.25, 30.65], [92.5, 30.75], [93.03, 30.53], [93.25, 30.0], [93.03, 29.47], [92.5, 29.25], [92.25, 29.35], [92.0, 29.25]]]]}, "2024-10-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.75, 30.0], [90.97, 30.53], [91.5, 30.75], [91.75, 30.65], [92.0, 30.75], [92.25, 30.65], [92.5, 30.75], [93.03, 30.53], [93.25, 30.0], [93.13, 29.7], [93.25, 29.65], [93.5, 29.75], [94.03, 29.53], [94.25, 29.0], [94.03, 28.47], [93.5, 28.25], [93.25, 28.35], [93.0, 28.25], [92.47, 28.47], [92.3, 28.88], [92.0, 28.75], [91.75, 28.85], [91.5, 28.75], [90.97, 28.97], [90.75, 29.5], [90.85, 29.75], [90.75, 30.0]]]]}, "2024-10-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.75, 30.0], [90.97, 30.53], [91.5, 30.75], [91.75, 30.65], [92.0, 30.75], [92.25, 30.65], [92.32, 30.68], [92.47, 31.03], [93.0, 31.25], [93.25, 31.15], [93.5, 31.25], [93.75, 31.15], [94.0, 31.25], [94.53, 31.03], [94.75, 30.5], [94.65, 30.25], [94.75, 30.0], [94.65, 29.75], [94.75, 29.5], [94.53, 28.97], [94.18, 28.82], [94.03, 28.47], [93.5, 28.25], [93.25, 28.35], [93.0, 28.25], [92.75, 28.35], [92.5, 28.25], [92.25, 28.35], [92.0, 28.25], [91.47, 28.47], [91.32, 28.82], [90.97, 28.97], [90.75, 29.5], [90.85, 29.75], [90.75, 30.0]]]]}, "2024-10-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.75, 30.0], [90.97, 30.53], [91.5, 30.75], [91.75, 30.65], [92.0, 30.75], [92.25, 30.65], [92.32, 30.68], [92.47, 31.03], [93.0, 31.25], [93.25, 31.15], [93.5, 31.25], [93.75, 31.15], [94.0, 31.25], [94.53, 31.03], [94.75, 30.5], [94.65, 30.25], [94.75, 30.0], [94.65, 29.75], [94.75, 29.5], [94.53, 28.97], [94.18, 28.82], [94.03, 28.47], [93.5, 28.25], [93.25, 28.35], [93.0, 28.25], [92.75, 28.35], [92.5, 28.25], [92.25, 28.35], [92.0, 28.25], [91.47, 28.47], [91.32, 28.82], [90.97, 28.97], [90.75, 29.5], [90.85, 29.75], [90.75, 30.0]]]]}, "2024-10-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.97, 28.97], [90.75, 29.5], [90.97, 30.03], [91.32, 30.18], [91.47, 30.53], [92.0, 30.75], [92.25, 30.65], [92.32, 30.68], [92.47, 31.03], [93.0, 31.25], [93.25, 31.15], [93.5, 31.25], [93.75, 31.15], [94.0, 31.25], [94.53, 31.03], [94.75, 30.5], [94.65, 30.25], [94.75, 30.0], [94.65, 29.75], [94.75, 29.5], [94.53, 28.97], [94.0, 28.75], [93.75, 28.85], [93.68, 28.82], [93.53, 28.47], [93.0, 28.25], [92.75, 28.35], [92.5, 28.25], [92.25, 28.35], [92.0, 28.25], [91.47, 28.47], [91.32, 28.82], [90.97, 28.97]]]]}, "2024-10-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[91.25, 30.0], [91.47, 30.53], [92.0, 30.75], [92.5, 30.54], [93.0, 30.75], [93.25, 30.65], [93.5, 30.75], [93.75, 30.65], [94.0, 30.75], [94.53, 30.53], [94.75, 30.0], [94.53, 29.47], [94.0, 29.25], [93.75, 29.35], [93.5, 29.25], [93.25, 29.35], [93.0, 29.25], [92.7, 29.38], [92.53, 28.97], [92.0, 28.75], [91.47, 28.97], [91.25, 29.5], [91.35, 29.75], [91.25, 30.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.922253468330268}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.042355775086789}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-7.965048217773415, -4.354481397356267, -8.739867839106807, -9.713459965220636, -8.857176432890014, -9.134184900919593]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.29825948079423, -9.670341237386026, -14.429429753621378, -17.180420303344704, -14.177039210001624, -12.593705876668253]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.067276688825672, -4.227857797841263, -6.497901235554445, -7.061818103582198, -5.44793698134154, -5.4797879705027075]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.788774325814359, -6.750538982640933, -9.728913037737527, -10.922253468330268, 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