{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:12:48.213856", "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": "2021-Aug-16_to_2021-Aug-20_96.0_23.5"}, "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": 2021080000768}, "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 16 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 20 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 183183.8443081787}, "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", "Myanmar"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": 23.5}, "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": 96.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "96.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 94.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 100.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[97.0, 21.25], [96.75, 21.35], [96.5, 21.25], [96.25, 21.35], [96.0, 21.25], [95.7, 21.38], [95.53, 20.97], [95.0, 20.75], [94.47, 20.97], [94.25, 21.5], [94.35, 21.75], [94.25, 22.0], [94.35, 22.25], [94.32, 22.32], [93.97, 22.47], [93.75, 23.0], [93.85, 23.25], [93.75, 23.5], [93.97, 24.03], [94.32, 24.18], [94.35, 24.25], [94.25, 24.5], [94.47, 25.03], [94.82, 25.18], [94.85, 25.25], [94.75, 25.5], [94.97, 26.03], [95.32, 26.18], [95.47, 26.53], [95.82, 26.68], [95.97, 27.03], [96.5, 27.25], [96.75, 27.15], [96.82, 27.18], [96.85, 27.25], [96.75, 27.5], [96.97, 28.03], [97.5, 28.25], [98.03, 28.03], [98.18, 27.68], [98.53, 27.53], [98.75, 27.0], [98.53, 26.47], [98.18, 26.32], [98.15, 26.25], [98.25, 26.0], [98.07, 25.57], [98.32, 25.68], [98.47, 26.03], [99.0, 26.25], [99.25, 26.15], [99.5, 26.25], [99.75, 26.15], [100.0, 26.25], [100.53, 26.03], [100.75, 25.5], [100.53, 24.97], [100.18, 24.82], [100.15, 24.75], [100.25, 24.5], [100.15, 24.25], [100.25, 24.0], [100.15, 23.75], [100.25, 23.5], [100.15, 23.25], [100.25, 23.0], [100.03, 22.47], [99.68, 22.32], [99.65, 22.25], [99.75, 22.0], [99.53, 21.47], [99.0, 21.25], [98.47, 21.47], [98.25, 22.0], [98.35, 22.25], [98.25, 22.5], [98.03, 21.97], [97.68, 21.82], [97.53, 21.47], [97.0, 21.25]], [[98.38, 22.8], [98.25, 22.85], [98.13, 22.8], [98.25, 22.5], [98.38, 22.8]], [[97.65, 24.75], [97.75, 24.5], [97.63, 24.2], [97.75, 24.15], [98.0, 24.25], [98.25, 24.15], [98.32, 24.18], [98.35, 24.25], [98.32, 24.32], [97.97, 24.47], [97.75, 25.0], [97.65, 24.75]], [[97.93, 25.43], [97.68, 25.32], [97.65, 25.25], [97.75, 25.0], [97.93, 25.43]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.25, 22.5], [94.35, 22.75], [94.25, 23.0], [94.35, 23.25], [94.25, 23.5], [94.47, 24.03], [95.0, 24.25], [95.25, 24.15], [95.32, 24.18], [95.35, 24.25], [95.25, 24.5], [95.47, 25.03], [96.0, 25.25], [96.25, 25.15], [96.5, 25.25], [97.03, 25.03], [97.25, 24.5], [97.15, 24.25], [97.25, 24.0], [97.03, 23.47], [96.68, 23.32], [96.53, 22.97], [96.0, 22.75], [95.75, 22.85], [95.68, 22.82], [95.65, 22.75], [95.75, 22.5], [95.65, 22.25], [95.75, 22.0], [95.53, 21.47], [95.0, 21.25], [94.47, 21.47], [94.25, 22.0], [94.35, 22.25], [94.25, 22.5]]]]}, "2021-08-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.75, 23.5], [93.97, 24.03], [94.32, 24.18], [94.35, 24.25], [94.25, 24.5], [94.47, 25.03], [94.82, 25.18], [94.85, 25.25], [94.75, 25.5], [94.97, 26.03], [95.32, 26.18], [95.47, 26.53], [95.82, 26.68], [95.97, 27.03], [96.5, 27.25], [96.75, 27.15], [96.82, 27.18], [96.85, 27.25], [96.75, 27.5], [96.97, 28.03], [97.5, 28.25], [98.03, 28.03], [98.18, 27.68], [98.53, 27.53], [98.75, 27.0], [98.53, 26.47], [98.18, 26.32], [98.15, 26.25], [98.25, 26.0], [98.07, 25.57], [98.32, 25.68], [98.47, 26.03], [99.0, 26.25], [99.25, 26.15], [99.5, 26.25], [99.75, 26.15], [100.0, 26.25], [100.53, 26.03], [100.75, 25.5], [100.53, 24.97], [100.18, 24.82], [100.15, 24.75], [100.25, 24.5], [100.15, 24.25], [100.25, 24.0], [100.15, 23.75], [100.25, 23.5], [100.15, 23.25], [100.25, 23.0], [100.03, 22.47], [99.68, 22.32], [99.65, 22.25], [99.75, 22.0], [99.53, 21.47], [99.0, 21.25], [98.47, 21.47], [98.25, 22.0], [98.35, 22.25], [98.25, 22.5], [98.03, 21.97], [97.68, 21.82], [97.53, 21.47], [97.0, 21.25], [96.47, 21.47], [96.25, 22.0], [96.47, 22.53], [96.82, 22.68], [96.96, 23.0], [96.8, 23.38], [96.68, 23.32], [96.53, 22.97], [96.0, 22.75], [95.75, 22.85], [95.68, 22.82], [95.65, 22.75], [95.75, 22.5], [95.65, 22.25], [95.75, 22.0], [95.53, 21.47], [95.0, 21.25], [94.47, 21.47], [94.25, 22.0], [94.35, 22.25], [94.32, 22.32], [93.97, 22.47], [93.75, 23.0], [93.85, 23.25], [93.75, 23.5]], [[98.38, 22.8], [98.25, 22.85], [98.13, 22.8], [98.25, 22.5], [98.38, 22.8]], [[98.35, 24.25], [98.32, 24.32], [97.97, 24.47], [97.75, 25.0], [97.65, 24.75], [97.75, 24.5], [97.63, 24.2], [97.75, 24.15], [98.0, 24.25], [98.25, 24.15], [98.32, 24.18], [98.35, 24.25]], [[97.93, 25.43], [97.68, 25.32], [97.65, 25.25], [97.75, 25.0], [97.93, 25.43]]]]}, "2021-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.75, 23.5], [93.97, 24.03], [94.32, 24.18], [94.35, 24.25], [94.25, 24.5], [94.47, 25.03], [94.82, 25.18], [94.85, 25.25], [94.75, 25.5], [94.97, 26.03], [95.32, 26.18], [95.47, 26.53], [95.82, 26.68], [95.97, 27.03], [96.5, 27.25], [96.75, 27.15], [96.82, 27.18], [96.85, 27.25], [96.75, 27.5], [96.97, 28.03], [97.5, 28.25], [98.03, 28.03], [98.18, 27.68], [98.53, 27.53], [98.75, 27.0], [98.53, 26.47], [98.18, 26.32], [98.15, 26.25], [98.25, 26.0], [98.07, 25.57], [98.32, 25.68], [98.47, 26.03], [99.0, 26.25], [99.25, 26.15], [99.5, 26.25], [99.75, 26.15], [100.0, 26.25], [100.53, 26.03], [100.75, 25.5], [100.53, 24.97], [100.18, 24.82], [100.15, 24.75], [100.25, 24.5], [100.15, 24.25], [100.25, 24.0], [100.15, 23.75], [100.25, 23.5], [100.15, 23.25], [100.25, 23.0], [100.03, 22.47], [99.68, 22.32], [99.65, 22.25], [99.75, 22.0], [99.53, 21.47], [99.0, 21.25], [98.47, 21.47], [98.25, 22.0], [98.35, 22.25], [98.25, 22.5], [98.03, 21.97], [97.68, 21.82], [97.53, 21.47], [97.0, 21.25], [96.75, 21.35], [96.5, 21.25], [96.25, 21.35], [96.0, 21.25], [95.7, 21.38], [95.53, 20.97], [95.0, 20.75], [94.47, 20.97], [94.25, 21.5], [94.35, 21.75], [94.25, 22.0], [94.35, 22.25], [94.32, 22.32], [93.97, 22.47], [93.75, 23.0], [93.85, 23.25], [93.75, 23.5]], [[98.38, 22.8], [98.25, 22.85], [98.13, 22.8], [98.25, 22.5], [98.38, 22.8]], [[98.35, 24.25], [98.32, 24.32], [97.97, 24.47], [97.75, 25.0], [97.65, 24.75], [97.75, 24.5], [97.63, 24.2], [97.75, 24.15], [98.0, 24.25], [98.25, 24.15], [98.32, 24.18], [98.35, 24.25]], [[97.93, 25.43], [97.68, 25.32], [97.65, 25.25], [97.75, 25.0], [97.93, 25.43]]]]}, "2021-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.75, 23.5], [93.97, 24.03], [94.32, 24.18], [94.35, 24.25], [94.25, 24.5], [94.47, 25.03], [94.82, 25.18], [94.85, 25.25], [94.75, 25.5], [94.97, 26.03], [95.32, 26.18], [95.47, 26.53], [95.82, 26.68], [95.97, 27.03], [96.5, 27.25], [96.75, 27.15], [96.82, 27.18], [96.85, 27.25], [96.75, 27.5], [96.97, 28.03], [97.5, 28.25], [98.03, 28.03], [98.18, 27.68], [98.53, 27.53], [98.75, 27.0], [98.53, 26.47], [98.18, 26.32], [98.15, 26.25], [98.25, 26.0], [98.07, 25.57], [98.32, 25.68], [98.47, 26.03], [99.0, 26.25], [99.25, 26.15], [99.5, 26.25], [99.75, 26.15], [100.0, 26.25], [100.53, 26.03], [100.75, 25.5], [100.53, 24.97], [100.18, 24.82], [100.15, 24.75], [100.25, 24.5], [100.15, 24.25], [100.25, 24.0], [100.15, 23.75], [100.25, 23.5], [100.15, 23.25], [100.25, 23.0], [100.03, 22.47], [99.68, 22.32], [99.65, 22.25], [99.75, 22.0], [99.53, 21.47], [99.0, 21.25], [98.47, 21.47], [98.25, 22.0], [98.35, 22.25], [98.25, 22.5], [98.03, 21.97], [97.68, 21.82], [97.53, 21.47], [97.0, 21.25], [96.75, 21.35], [96.5, 21.25], [96.25, 21.35], [96.0, 21.25], [95.7, 21.38], [95.53, 20.97], [95.0, 20.75], [94.47, 20.97], [94.25, 21.5], [94.35, 21.75], [94.25, 22.0], [94.35, 22.25], [94.32, 22.32], [93.97, 22.47], [93.75, 23.0], [93.85, 23.25], [93.75, 23.5]], [[98.38, 22.8], [98.25, 22.85], [98.13, 22.8], [98.25, 22.5], [98.38, 22.8]], [[98.35, 24.25], [98.32, 24.32], [97.97, 24.47], [97.75, 25.0], [97.65, 24.75], [97.75, 24.5], [97.63, 24.2], [97.75, 24.15], [98.0, 24.25], [98.25, 24.15], [98.32, 24.18], [98.35, 24.25]], [[97.93, 25.43], [97.68, 25.32], [97.65, 25.25], [97.75, 25.0], [97.93, 25.43]]]]}, "2021-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[95.32, 22.32], [94.97, 22.47], [94.75, 23.0], [94.97, 23.53], [95.32, 23.68], [95.47, 24.03], [96.0, 24.25], [96.25, 24.15], [96.5, 24.25], [97.03, 24.03], [97.18, 23.68], [97.53, 23.53], [97.75, 23.0], [97.54, 22.5], [97.75, 22.0], [97.53, 21.47], [97.0, 21.25], [96.75, 21.35], [96.5, 21.25], [96.25, 21.35], [96.0, 21.25], [95.7, 21.38], [95.53, 20.97], [95.0, 20.75], [94.47, 20.97], [94.25, 21.5], [94.47, 22.03], [95.0, 22.25], [95.3, 22.13], [95.35, 22.25], [95.32, 22.32]]], [[[96.5, 27.25], [96.75, 27.15], [96.82, 27.18], [96.85, 27.25], [96.75, 27.5], [96.97, 28.03], [97.5, 28.25], [98.03, 28.03], [98.25, 27.5], [98.15, 27.25], [98.25, 27.0], [98.15, 26.75], [98.25, 26.5], [98.03, 25.97], [97.68, 25.82], [97.53, 25.47], [97.0, 25.25], [96.75, 25.35], [96.5, 25.25], [96.25, 25.35], [96.0, 25.25], [95.47, 25.47], [95.25, 26.0], [95.47, 26.53], [95.82, 26.68], [95.97, 27.03], [96.5, 27.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.65591954991271}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0495306584293873}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.277658536765898, 23.263850320083463, 22.882397816741445, 23.203848859922402, 24.69366657348246]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.364763642021103, 17.818386647131263, 17.78734641269631, 17.9038272924318, 21.187932096015118]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6345017869823608, -1.746634592694606, -2.436275096943161, -2.138009088806373, -1.5455349510285799]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.9177398384567823, -2.419870292966152, -3.65591954991271, -2.940180870159054, -1.9088550805171849]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5457551280317283, -1.537154652493258, -2.1985092223869054, -1.9458204706423052, -1.4421019628996226]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.776087913742116, -2.171024222894194, -3.48174288396103, -2.991425795264591, -1.8342601275423913]}}