{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:18.718666", "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-Apr-10_to_2024-Apr-15_96.5_31.0"}, "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": 2024040000251}, "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 10 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 15 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": 57778.770889640815}, "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": 31.0}, "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": 96.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "96.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 95.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 98.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[99.25, 31.5], [99.03, 30.97], [98.5, 30.75], [98.25, 30.85], [98.13, 30.8], [98.25, 30.5], [98.03, 29.97], [97.5, 29.75], [97.25, 29.85], [97.0, 29.75], [96.75, 29.85], [96.5, 29.75], [95.97, 29.97], [95.8, 30.38], [95.5, 30.25], [95.25, 30.35], [95.0, 30.25], [94.47, 30.47], [94.25, 31.0], [94.47, 31.53], [94.88, 31.7], [94.75, 32.0], [94.85, 32.25], [94.75, 32.5], [94.97, 33.03], [95.5, 33.25], [95.75, 33.15], [96.0, 33.25], [96.25, 33.15], [96.32, 33.18], [96.47, 33.53], [97.0, 33.75], [97.25, 33.65], [97.5, 33.75], [98.0, 33.54], [98.5, 33.75], [99.03, 33.53], [99.25, 33.0], [99.04, 32.5], [99.25, 32.0], [99.15, 31.75], [99.25, 31.5]], [[97.15, 31.25], [97.18, 31.18], [97.25, 31.15], [97.38, 31.2], [97.3, 31.38], [97.18, 31.32], [97.15, 31.25]]]]}}, "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": {"2024-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.47, 29.97], [96.25, 30.5], [96.47, 31.03], [97.0, 31.25], [97.25, 31.15], [97.5, 31.25], [98.03, 31.03], [98.25, 30.5], [98.03, 29.97], [97.5, 29.75], [97.25, 29.85], [97.0, 29.75], [96.47, 29.97]]], [[[95.5, 31.75], [94.97, 31.97], [94.75, 32.5], [94.97, 33.03], [95.5, 33.25], [96.03, 33.03], [96.25, 32.5], [96.03, 31.97], [95.5, 31.75]]]]}, "2024-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.75, 32.5], [94.97, 33.03], [95.5, 33.25], [95.75, 33.15], [96.0, 33.25], [96.25, 33.15], [96.32, 33.18], [96.47, 33.53], [97.0, 33.75], [97.25, 33.65], [97.5, 33.75], [98.0, 33.54], [98.5, 33.75], [99.03, 33.53], [99.25, 33.0], [99.04, 32.5], [99.25, 32.0], [99.15, 31.75], [99.25, 31.5], [99.03, 30.97], [98.5, 30.75], [98.25, 30.85], [98.13, 30.8], [98.25, 30.5], [98.03, 29.97], [97.5, 29.75], [97.25, 29.85], [97.0, 29.75], [96.47, 29.97], [96.32, 30.32], [95.97, 30.47], [95.75, 31.0], [95.85, 31.25], [95.82, 31.32], [95.75, 31.35], [95.5, 31.25], [94.97, 31.47], [94.75, 32.0], [94.85, 32.25], [94.75, 32.5]], [[97.25, 31.15], [97.38, 31.2], [97.3, 31.38], [97.18, 31.32], [97.15, 31.25], [97.18, 31.18], [97.25, 31.15]]]]}, "2024-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.75, 32.5], [94.97, 33.03], [95.5, 33.25], [95.75, 33.15], [96.0, 33.25], [96.25, 33.15], [96.32, 33.18], [96.47, 33.53], [97.0, 33.75], [97.25, 33.65], [97.5, 33.75], [98.0, 33.54], [98.5, 33.75], [99.03, 33.53], [99.25, 33.0], [99.04, 32.5], [99.25, 32.0], [99.15, 31.75], [99.25, 31.5], [99.03, 30.97], [98.5, 30.75], [98.25, 30.85], [98.13, 30.8], [98.25, 30.5], [98.03, 29.97], [97.5, 29.75], [97.25, 29.85], [97.0, 29.75], [96.47, 29.97], [96.32, 30.32], [95.97, 30.47], [95.82, 30.82], [95.47, 30.97], [95.32, 31.32], [94.97, 31.47], [94.75, 32.0], [94.85, 32.25], [94.75, 32.5]], [[97.25, 31.15], [97.38, 31.2], [97.3, 31.38], [97.18, 31.32], [97.15, 31.25], [97.18, 31.18], [97.25, 31.15]]]]}, "2024-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": 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[97.15, 31.25], [97.25, 31.0], [97.15, 30.75], [97.25, 30.5], [97.03, 29.97], [96.5, 29.75], [95.97, 29.97], [95.8, 30.38], [95.5, 30.25], [95.25, 30.35], [95.0, 30.25], [94.47, 30.47]]], [[[98.5, 30.75], [97.97, 30.97], [97.75, 31.5], [97.97, 32.03], [98.5, 32.25], [99.03, 32.03], [99.25, 31.5], [99.03, 30.97], [98.5, 30.75]]]]}, "2024-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[95.0, 30.25], [94.47, 30.47], [94.25, 31.0], [94.47, 31.53], [95.0, 31.75], [95.25, 31.65], [95.32, 31.68], [95.47, 32.03], [96.0, 32.25], [96.53, 32.03], [96.68, 31.68], [97.03, 31.53], [97.25, 31.0], [97.15, 30.75], [97.25, 30.5], [97.03, 29.97], [96.5, 29.75], [95.97, 29.97], [95.8, 30.38], [95.5, 30.25], [95.25, 30.35], [95.0, 30.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.266618786284312}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.175769125542248}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-10.378555718409473, -10.347813978064153, -10.146682575555701, -9.876786043616448, -10.58077748362291, -10.475792234148685]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-12.734813237879678, -13.119082795416489, -12.052713025129037, -12.180829239002094, -12.80377455793979, -11.956784032889402]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.511726811086362, -5.128717354098395, -5.029204251562891, -4.950079669138174, -6.2821452486893135, -5.69949655702643]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.964279029068223, -6.719554332744167, -6.895267536804852, -6.654937640046057, -8.266618786284312, -7.144714667657979]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7278347418334385, -1.8089415655201533, -1.771135107914676, -1.718941108037671, -2.0652356629442012, -1.9951369418941542]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.840863721880377, -2.291616578000283, -2.2631239475288565, -2.025415947806751, -2.5287254262306926, -2.2425659258298483]}}