{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:08.877102", "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": "2012-Apr-09_to_2012-Apr-12_100.5_31.5"}, "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": 2012040000612}, "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 09 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2012"}, "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": 57524.68339528767}, "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.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": 31.5}, "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": 100.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "100.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 96.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 101.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 30.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.25, 33.0], [96.47, 33.53], [97.0, 33.75], [97.53, 33.53], [97.68, 33.18], [97.75, 33.15], [98.0, 33.25], [98.25, 33.15], [98.5, 33.25], [98.75, 33.15], [99.0, 33.25], [99.25, 33.15], [99.32, 33.18], [99.47, 33.53], [100.0, 33.75], [100.25, 33.65], [100.5, 33.75], [101.03, 33.53], [101.18, 33.18], [101.25, 33.15], [101.5, 33.25], [102.03, 33.03], [102.25, 32.5], [102.15, 32.25], [102.25, 32.0], [102.03, 31.47], [101.68, 31.32], [101.65, 31.25], [101.75, 31.0], [101.53, 30.47], [101.0, 30.25], [100.47, 30.47], [100.32, 30.82], [100.25, 30.85], [100.0, 30.75], [99.47, 30.97], [99.32, 31.32], [98.97, 31.47], [98.82, 31.82], [98.75, 31.85], [98.5, 31.75], [98.25, 31.85], [98.18, 31.82], [98.03, 31.47], [97.5, 31.25], [96.97, 31.47], [96.75, 32.0], [96.85, 32.25], [96.82, 32.32], [96.47, 32.47], [96.25, 33.0]]]]}, "2012-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.25, 33.0], [96.47, 33.53], [97.0, 33.75], [97.53, 33.53], [97.68, 33.18], [97.75, 33.15], [98.0, 33.25], [98.25, 33.15], [98.5, 33.25], [98.75, 33.15], [99.0, 33.25], [99.25, 33.15], [99.32, 33.18], [99.47, 33.53], [100.0, 33.75], [100.25, 33.65], [100.5, 33.75], [101.03, 33.53], [101.18, 33.18], [101.25, 33.15], [101.5, 33.25], [102.03, 33.03], [102.25, 32.5], [102.15, 32.25], [102.25, 32.0], [102.03, 31.47], [101.68, 31.32], [101.65, 31.25], [101.75, 31.0], [101.53, 30.47], [101.0, 30.25], [100.47, 30.47], [100.32, 30.82], [100.25, 30.85], [100.0, 30.75], [99.47, 30.97], [99.32, 31.32], [98.97, 31.47], [98.82, 31.82], [98.75, 31.85], [98.5, 31.75], [98.25, 31.85], [98.18, 31.82], [98.03, 31.47], [97.5, 31.25], [96.97, 31.47], [96.75, 32.0], [96.85, 32.25], [96.82, 32.32], [96.47, 32.47], [96.25, 33.0]]]]}, "2012-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.25, 33.0], [96.47, 33.53], [97.0, 33.75], [97.53, 33.53], [97.68, 33.18], [97.75, 33.15], [98.0, 33.25], [98.25, 33.15], [98.5, 33.25], [98.75, 33.15], [99.0, 33.25], [99.25, 33.15], [99.32, 33.18], [99.47, 33.53], [100.0, 33.75], [100.25, 33.65], [100.5, 33.75], [101.03, 33.53], [101.18, 33.18], [101.25, 33.15], [101.5, 33.25], [102.03, 33.03], [102.25, 32.5], [102.15, 32.25], [102.25, 32.0], [102.03, 31.47], [101.68, 31.32], [101.65, 31.25], [101.75, 31.0], [101.53, 30.47], [101.0, 30.25], [100.47, 30.47], [100.32, 30.82], [100.25, 30.85], [100.0, 30.75], [99.47, 30.97], [99.32, 31.32], [98.97, 31.47], [98.82, 31.82], [98.75, 31.85], [98.5, 31.75], [98.25, 31.85], [98.18, 31.82], [98.03, 31.47], [97.5, 31.25], [96.97, 31.47], [96.75, 32.0], [96.85, 32.25], [96.82, 32.32], [96.47, 32.47], [96.25, 33.0]]]]}, "2012-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.97, 31.47], [98.75, 32.0], [98.97, 32.53], [99.5, 32.75], [100.03, 32.53], [100.2, 32.13], [100.5, 32.25], [101.03, 32.03], [101.25, 31.5], [101.03, 30.97], [100.5, 30.75], [99.97, 30.97], [99.8, 31.38], [99.5, 31.25], [98.97, 31.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.447626230735068}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.709926003873148}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-9.636988103649855, -9.22697042686616, -8.913084554829084, -6.7861292500018635]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-12.111516170767402, -11.877090635531488, -11.879890424041491, -8.165857460694042]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.905177626731857, -5.687481334856725, -5.559798794365585, -5.460448816191217]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.175412846253892, -8.447626230735068, -7.600926173751986, -5.608895563744852]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.69716548094947, -1.682575892091893, -1.671352974213773, -1.5047202761668192]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0972297117384775, -2.1972025994486724, -2.1250170615520014, -1.5639205504376203]}}