{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:26.895536", "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": "2023-Jan-27_to_2023-Jan-29_102.5_24.0"}, "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": 2023010001253}, "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": "January 27 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 29 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 56055.55465141298}, "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": 24.0}, "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": 102.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "102.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 101.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 102.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[100.25, 25.5], [100.35, 25.75], [100.25, 26.0], [100.35, 26.25], [100.25, 26.5], [100.47, 27.03], [101.0, 27.25], [101.25, 27.15], [101.5, 27.25], [102.03, 27.03], [102.18, 26.68], [102.53, 26.53], [102.75, 26.0], [102.65, 25.75], [102.75, 25.5], [102.65, 25.25], [102.75, 25.0], [102.65, 24.75], [102.68, 24.68], [103.03, 24.53], [103.25, 24.0], [103.15, 23.75], [103.25, 23.5], [103.03, 22.97], [102.5, 22.75], [102.25, 22.85], [102.0, 22.75], [101.75, 22.85], [101.5, 22.75], [100.97, 22.97], [100.75, 23.5], [100.85, 23.75], [100.82, 23.82], [100.47, 23.97], [100.25, 24.5], [100.35, 24.75], [100.25, 25.0], [100.35, 25.25], [100.25, 25.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.25, 25.0], [100.35, 25.25], [100.25, 25.5], [100.35, 25.75], [100.25, 26.0], [100.35, 26.25], [100.25, 26.5], [100.47, 27.03], [101.0, 27.25], [101.25, 27.15], [101.5, 27.25], [102.03, 27.03], [102.18, 26.68], [102.53, 26.53], [102.75, 26.0], [102.65, 25.75], [102.75, 25.5], [102.65, 25.25], [102.75, 25.0], [102.65, 24.75], [102.68, 24.68], [103.03, 24.53], [103.25, 24.0], [103.15, 23.75], [103.25, 23.5], [103.03, 22.97], [102.5, 22.75], [102.25, 22.85], [102.0, 22.75], [101.75, 22.85], [101.5, 22.75], [100.97, 22.97], [100.75, 23.5], [100.85, 23.75], [100.82, 23.82], [100.47, 23.97], [100.25, 24.5], [100.35, 24.75], [100.25, 25.0]]]]}, "2023-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.25, 25.0], [100.35, 25.25], [100.25, 25.5], [100.35, 25.75], [100.25, 26.0], [100.35, 26.25], [100.25, 26.5], [100.47, 27.03], [101.0, 27.25], [101.25, 27.15], [101.5, 27.25], [102.03, 27.03], [102.18, 26.68], [102.53, 26.53], [102.75, 26.0], [102.65, 25.75], [102.75, 25.5], [102.65, 25.25], [102.75, 25.0], [102.65, 24.75], [102.68, 24.68], [103.03, 24.53], [103.25, 24.0], [103.15, 23.75], [103.25, 23.5], [103.03, 22.97], [102.5, 22.75], [102.25, 22.85], [102.0, 22.75], [101.75, 22.85], [101.5, 22.75], [100.97, 22.97], [100.75, 23.5], [100.85, 23.75], [100.82, 23.82], [100.47, 23.97], [100.25, 24.5], [100.35, 24.75], [100.25, 25.0]]]]}, "2023-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.25, 25.0], [100.35, 25.25], [100.25, 25.5], [100.35, 25.75], [100.25, 26.0], [100.35, 26.25], [100.25, 26.5], [100.47, 27.03], [101.0, 27.25], [101.25, 27.15], [101.5, 27.25], [102.03, 27.03], [102.18, 26.68], [102.53, 26.53], [102.75, 26.0], [102.65, 25.75], [102.75, 25.5], [102.65, 25.25], [102.75, 25.0], [102.65, 24.75], [102.68, 24.68], [103.03, 24.53], [103.25, 24.0], [103.15, 23.75], [103.25, 23.5], [103.03, 22.97], [102.5, 22.75], [102.25, 22.85], [102.0, 22.75], [101.75, 22.85], [101.5, 22.75], [100.97, 22.97], [100.75, 23.5], [100.85, 23.75], [100.82, 23.82], [100.47, 23.97], [100.25, 24.5], [100.35, 24.75], [100.25, 25.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.360499591388873}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.1938089415278625}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.8249205492874125, 7.553663196259777, 7.519350193616219]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.9107044091578587, 4.645177266497399, 4.103914887869053]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.5884167903407045, -3.9279981581237564, -4.065011876119127]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.360499591388873, -5.730814577213323, -4.83870087451578]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9725458838641905, -1.7100474475071052, -1.7510073561449293]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.381089384597233, -2.164969620537664, -2.1530956586813446]}}