{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:36.692798", "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-Apr-05_to_2018-Apr-08_100.0_34.0"}, "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": 2018040000303}, "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 05 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 08 2018"}, "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": 75230.93809636665}, "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": 34.0}, "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": 100.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "100.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 99.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 103.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.97, 33.47], [98.75, 34.0], [98.97, 34.53], [99.5, 34.75], [99.75, 34.65], [100.0, 34.75], [100.25, 34.65], [100.5, 34.75], [101.03, 34.53], [101.25, 34.0], [101.03, 33.47], [100.5, 33.25], [100.25, 33.35], [100.0, 33.25], [99.75, 33.35], [99.5, 33.25], [98.97, 33.47]]]]}, "2018-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.85, 33.75], [98.75, 34.0], [98.97, 34.53], [99.32, 34.68], [99.47, 35.03], [100.0, 35.25], [100.53, 35.03], [100.68, 34.68], [100.75, 34.65], [101.0, 34.75], [101.53, 34.53], [101.68, 34.18], [102.03, 34.03], [102.18, 33.68], [102.25, 33.65], [102.5, 33.75], [102.75, 33.65], [103.0, 33.75], [103.53, 33.53], [103.75, 33.0], [103.53, 32.47], [103.18, 32.32], [103.03, 31.97], [102.5, 31.75], [102.25, 31.85], [102.13, 31.8], [102.25, 31.5], [102.03, 30.97], [101.5, 30.75], [101.25, 30.85], [101.0, 30.75], [100.75, 30.85], [100.5, 30.75], [99.97, 30.97], [99.82, 31.32], [99.47, 31.47], [99.25, 32.0], [99.35, 32.25], [99.32, 32.32], [98.97, 32.47], [98.75, 33.0], [98.85, 33.25], [98.75, 33.5], [98.85, 33.75]]]]}, "2018-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.85, 33.75], [98.75, 34.0], [98.97, 34.53], [99.32, 34.68], [99.47, 35.03], [100.0, 35.25], [100.53, 35.03], [100.68, 34.68], [100.75, 34.65], [101.0, 34.75], [101.53, 34.53], [101.68, 34.18], [102.03, 34.03], [102.18, 33.68], [102.25, 33.65], [102.5, 33.75], [102.75, 33.65], [103.0, 33.75], [103.53, 33.53], [103.75, 33.0], [103.53, 32.47], [103.18, 32.32], [103.03, 31.97], [102.5, 31.75], [102.25, 31.85], [102.13, 31.8], [102.25, 31.5], [102.03, 30.97], [101.5, 30.75], [101.25, 30.85], [101.0, 30.75], [100.75, 30.85], [100.5, 30.75], [99.97, 30.97], [99.82, 31.32], [99.47, 31.47], [99.25, 32.0], [99.35, 32.25], [99.32, 32.32], [98.97, 32.47], [98.75, 33.0], [98.85, 33.25], [98.75, 33.5], [98.85, 33.75]]]]}, "2018-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[98.85, 33.75], [98.75, 34.0], [98.97, 34.53], [99.32, 34.68], [99.47, 35.03], [100.0, 35.25], [100.53, 35.03], [100.7, 34.63], [101.0, 34.75], [101.53, 34.53], [101.68, 34.18], [102.03, 34.03], [102.18, 33.68], [102.25, 33.65], [102.5, 33.75], [102.75, 33.65], [103.0, 33.75], [103.53, 33.53], [103.75, 33.0], [103.53, 32.47], [103.18, 32.32], [103.03, 31.97], [102.5, 31.75], [102.25, 31.85], [102.13, 31.8], [102.25, 31.5], [102.03, 30.97], [101.5, 30.75], [101.25, 30.85], [101.0, 30.75], [100.75, 30.85], [100.5, 30.75], [99.97, 30.97], [99.82, 31.32], [99.47, 31.47], [99.25, 32.0], [99.35, 32.25], [99.32, 32.32], [98.97, 32.47], [98.75, 33.0], [98.85, 33.25], [98.75, 33.5], [98.85, 33.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.080344785179363}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.638017002414078}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-10.876568703940052, -11.090259419826793, -10.98288319543758, -9.341339309911348]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-11.176675244750584, -14.596992089033733, -13.52153813263152, -12.447422882918715]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.138517122595753, -7.1409774209303105, -7.1737727899521895, -5.722864490409756]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.907872084172766, -9.080344785179363, -9.014517393379435, -8.035357506640707]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4885344942543661, -2.0654005375821294, -1.9998139339854804, -1.5780643112392543]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6470192945520306, -2.5421091036811116, -2.5748550366063134, -1.973647827409156]}}