{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:19:28.579367", "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": "2020-Apr-12_to_2020-Apr-18_113.5_17.0"}, "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": 2020040000340}, "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 12 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 18 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 229349.24998051592}, "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", "S.E.Asia"]}, "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": ["South China Sea"]}, "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": 17.0}, "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": 113.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "113.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 108.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 115.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 20.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.88, 18.7], [108.75, 19.0], [108.97, 19.53], [109.32, 19.68], [109.47, 20.03], [110.0, 20.25], [110.25, 20.15], [110.5, 20.25], [110.75, 20.15], [110.82, 20.18], [110.97, 20.53], [111.32, 20.68], [111.47, 21.03], [112.0, 21.25], [112.25, 21.15], [112.5, 21.25], [112.75, 21.15], [113.0, 21.25], [113.53, 21.03], [113.68, 20.68], [114.03, 20.53], [114.25, 20.0], [114.03, 19.47], [113.68, 19.32], [113.53, 18.97], [113.18, 18.82], [113.15, 18.75], [113.18, 18.68], [113.25, 18.65], [113.5, 18.75], [113.75, 18.65], [114.0, 18.75], [114.5, 18.54], [115.0, 18.75], [115.53, 18.53], [115.75, 18.0], [115.65, 17.75], [115.75, 17.5], [115.65, 17.25], [115.75, 17.0], [115.65, 16.75], [115.75, 16.5], [115.65, 16.25], [115.75, 16.0], [115.53, 15.47], [115.0, 15.25], [114.75, 15.35], [114.5, 15.25], [114.25, 15.35], [114.0, 15.25], [113.75, 15.35], [113.5, 15.25], [113.25, 15.35], [113.0, 15.25], [112.75, 15.35], [112.5, 15.25], [112.25, 15.35], [112.0, 15.25], [111.47, 15.47], [111.32, 15.82], [110.97, 15.97], [110.82, 16.32], [110.75, 16.35], [110.5, 16.25], [109.97, 16.47], [109.82, 16.82], [109.75, 16.85], [109.5, 16.75], [109.25, 16.85], [109.0, 16.75], [108.75, 16.85], [108.5, 16.75], [107.97, 16.97], [107.75, 17.5], [107.97, 18.03], [108.32, 18.18], [108.47, 18.53], [108.88, 18.7]]]]}, "2020-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.88, 18.7], [108.75, 19.0], [108.97, 19.53], [109.32, 19.68], [109.47, 20.03], [110.0, 20.25], [110.25, 20.15], [110.5, 20.25], [110.75, 20.15], [110.82, 20.18], [110.97, 20.53], [111.32, 20.68], [111.47, 21.03], [112.0, 21.25], [112.25, 21.15], [112.5, 21.25], [112.75, 21.15], [113.0, 21.25], [113.53, 21.03], [113.68, 20.68], [114.03, 20.53], [114.25, 20.0], [114.03, 19.47], [113.68, 19.32], [113.53, 18.97], [113.18, 18.82], [113.15, 18.75], [113.18, 18.68], [113.25, 18.65], [113.5, 18.75], [113.75, 18.65], [114.0, 18.75], [114.5, 18.54], [115.0, 18.75], [115.53, 18.53], [115.75, 18.0], [115.65, 17.75], [115.75, 17.5], [115.65, 17.25], [115.75, 17.0], [115.65, 16.75], [115.75, 16.5], [115.65, 16.25], [115.75, 16.0], [115.53, 15.47], [115.0, 15.25], [114.75, 15.35], [114.5, 15.25], [114.25, 15.35], [114.0, 15.25], [113.75, 15.35], [113.5, 15.25], [113.25, 15.35], [113.0, 15.25], [112.75, 15.35], [112.5, 15.25], [112.25, 15.35], [112.0, 15.25], [111.47, 15.47], [111.32, 15.82], [110.97, 15.97], [110.82, 16.32], [110.75, 16.35], [110.5, 16.25], [109.97, 16.47], [109.82, 16.82], [109.75, 16.85], [109.5, 16.75], [109.25, 16.85], [109.0, 16.75], [108.75, 16.85], [108.5, 16.75], [107.97, 16.97], [107.75, 17.5], [107.97, 18.03], [108.32, 18.18], [108.47, 18.53], [108.88, 18.7]]]]}, "2020-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.88, 18.7], [108.75, 19.0], [108.97, 19.53], [109.32, 19.68], [109.47, 20.03], [110.0, 20.25], [110.25, 20.15], [110.5, 20.25], [110.75, 20.15], [110.82, 20.18], [110.97, 20.53], [111.32, 20.68], [111.47, 21.03], [112.0, 21.25], [112.25, 21.15], [112.5, 21.25], [112.75, 21.15], [113.0, 21.25], [113.53, 21.03], [113.68, 20.68], [114.03, 20.53], [114.25, 20.0], [114.03, 19.47], [113.68, 19.32], [113.53, 18.97], [113.18, 18.82], [113.15, 18.75], [113.18, 18.68], [113.25, 18.65], [113.5, 18.75], [113.75, 18.65], [114.0, 18.75], [114.5, 18.54], [115.0, 18.75], [115.53, 18.53], [115.75, 18.0], [115.65, 17.75], [115.75, 17.5], [115.65, 17.25], [115.75, 17.0], [115.65, 16.75], [115.75, 16.5], [115.65, 16.25], [115.75, 16.0], [115.53, 15.47], [115.0, 15.25], [114.75, 15.35], [114.5, 15.25], [114.25, 15.35], [114.0, 15.25], [113.75, 15.35], [113.5, 15.25], [113.25, 15.35], [113.0, 15.25], [112.75, 15.35], [112.5, 15.25], [112.25, 15.35], [112.0, 15.25], [111.47, 15.47], [111.32, 15.82], [110.97, 15.97], [110.82, 16.32], [110.75, 16.35], [110.5, 16.25], [109.97, 16.47], [109.82, 16.82], [109.75, 16.85], [109.5, 16.75], [109.25, 16.85], [109.0, 16.75], [108.75, 16.85], [108.5, 16.75], [107.97, 16.97], [107.75, 17.5], [107.97, 18.03], [108.32, 18.18], [108.47, 18.53], [108.88, 18.7]]]]}, "2020-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[111.47, 18.03], [111.82, 18.18], [111.97, 18.53], [112.5, 18.75], [112.75, 18.65], [113.0, 18.75], [113.25, 18.65], [113.5, 18.75], [113.75, 18.65], [114.0, 18.75], [114.5, 18.54], [115.0, 18.75], [115.53, 18.53], [115.75, 18.0], [115.65, 17.75], [115.75, 17.5], [115.65, 17.25], [115.75, 17.0], [115.65, 16.75], [115.75, 16.5], [115.53, 15.97], [115.0, 15.75], [114.75, 15.85], [114.68, 15.82], [114.53, 15.47], [114.0, 15.25], [113.75, 15.35], [113.5, 15.25], [113.25, 15.35], [113.0, 15.25], [112.75, 15.35], [112.5, 15.25], [111.97, 15.47], [111.75, 16.0], [111.85, 16.25], [111.75, 16.5], [111.85, 16.75], [111.82, 16.82], [111.47, 16.97], [111.25, 17.5], [111.47, 18.03]]], [[[111.97, 20.03], [112.5, 20.25], [112.75, 20.15], [113.0, 20.25], [113.53, 20.03], [113.75, 19.5], [113.53, 18.97], [113.0, 18.75], [112.75, 18.85], [112.5, 18.75], [111.97, 18.97], [111.75, 19.5], [111.97, 20.03]]]]}, "2020-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.47, 18.03], [113.0, 18.25], [113.25, 18.15], [113.5, 18.25], [114.03, 18.03], [114.18, 17.68], [114.53, 17.53], [114.75, 17.0], [114.65, 16.75], [114.75, 16.5], [114.53, 15.97], [114.0, 15.75], [113.75, 15.85], [113.5, 15.75], [112.97, 15.97], [112.82, 16.32], [112.47, 16.47], [112.25, 17.0], [112.35, 17.25], [112.25, 17.5], [112.47, 18.03]]]]}, "2020-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 18.03], [113.5, 18.25], [114.03, 18.03], [114.18, 17.68], [114.53, 17.53], [114.75, 17.0], [114.65, 16.75], [114.75, 16.5], [114.53, 15.97], [114.0, 15.75], [113.47, 15.97], [113.32, 16.32], [112.97, 16.47], [112.75, 17.0], [112.85, 17.25], [112.75, 17.5], [112.97, 18.03]]]]}, "2020-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 18.03], [113.5, 18.25], [114.03, 18.03], [114.18, 17.68], [114.53, 17.53], [114.75, 17.0], [114.53, 16.47], [114.0, 16.25], [113.75, 16.35], [113.5, 16.25], [112.97, 16.47], [112.75, 17.0], [112.85, 17.25], [112.75, 17.5], [112.97, 18.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.196581815024956}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9818362390239972}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.963373570372255, 24.006624883078757, 24.733051521331163, 25.65261549413475, 25.929734564168655, 25.928431025271266, 25.860157833920482]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.87466215158969, 17.91406892496667, 19.933914744060814, 24.21073568457041, 25.58331568619593, 25.65738511654348, 25.704596726589443]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.294585787952091, -2.333209610587219, -1.6835288339980377, -1.3525204434354976, -1.2575765687991438, -1.2994196552597117, -1.3636188016866981]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.057677874022318, -5.196581815024956, -3.891683666676613, -1.6496465567941527, -1.4331647908027776, -1.4122928294985968, -1.416728561476873]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.4384492365130086, -2.5121924420117154, -1.8204803302016603, -1.741432744609599, -1.60307165618293, -1.642927801551492, -1.661759834222164]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.354209642718826, -3.0134899962081594, -2.2145576371592735, -2.1145069748635974, -1.8023124270061073, -1.732585434192981, -1.7206305629653162]}}