{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:46.231168", "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-Mar-02_to_2012-Mar-04_109.0_29.5"}, "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": 2012030000291}, "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": "March 02 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 04 2012"}, "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": 75878.4699493839}, "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"]}, "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": 29.5}, "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": 109.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "109.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 106.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 111.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 26.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.25, 27.5], [106.47, 28.03], [106.82, 28.18], [106.85, 28.25], [106.75, 28.5], [106.97, 29.03], [107.32, 29.18], [107.47, 29.53], [107.82, 29.68], [107.97, 30.03], [108.5, 30.25], [108.75, 30.15], [109.0, 30.25], [109.25, 30.15], [109.5, 30.25], [109.75, 30.15], [109.82, 30.18], [109.88, 30.3], [109.47, 30.47], [109.25, 31.0], [109.47, 31.53], [110.0, 31.75], [110.25, 31.65], [110.5, 31.75], [111.03, 31.53], [111.18, 31.18], [111.53, 31.03], [111.75, 30.5], [111.65, 30.25], [111.75, 30.0], [111.53, 29.47], [111.18, 29.32], [111.03, 28.97], [110.5, 28.75], [110.25, 28.85], [110.18, 28.82], [110.03, 28.47], [109.68, 28.32], [109.65, 28.25], [109.75, 28.0], [109.53, 27.47], [109.18, 27.32], [109.15, 27.25], [109.25, 27.0], [109.03, 26.47], [108.5, 26.25], [108.25, 26.35], [108.0, 26.25], [107.75, 26.35], [107.5, 26.25], [106.97, 26.47], [106.82, 26.82], [106.47, 26.97], [106.25, 27.5]]]]}, "2012-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.25, 27.5], [106.47, 28.03], [106.82, 28.18], [106.85, 28.25], [106.75, 28.5], [106.97, 29.03], [107.32, 29.18], [107.47, 29.53], [107.82, 29.68], [107.97, 30.03], [108.5, 30.25], [108.75, 30.15], [109.0, 30.25], [109.25, 30.15], [109.5, 30.25], [109.75, 30.15], [109.82, 30.18], [109.88, 30.3], [109.47, 30.47], [109.25, 31.0], [109.47, 31.53], [110.0, 31.75], [110.25, 31.65], [110.5, 31.75], [111.03, 31.53], [111.18, 31.18], [111.53, 31.03], [111.75, 30.5], [111.65, 30.25], [111.75, 30.0], [111.53, 29.47], [111.18, 29.32], [111.03, 28.97], [110.5, 28.75], [110.25, 28.85], [110.18, 28.82], [110.03, 28.47], [109.68, 28.32], [109.65, 28.25], [109.75, 28.0], [109.53, 27.47], [109.18, 27.32], [109.15, 27.25], [109.25, 27.0], [109.03, 26.47], [108.5, 26.25], [108.25, 26.35], [108.0, 26.25], [107.75, 26.35], [107.5, 26.25], [106.97, 26.47], [106.82, 26.82], [106.47, 26.97], [106.25, 27.5]]]]}, "2012-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.25, 27.5], [106.47, 28.03], [106.82, 28.18], [106.85, 28.25], [106.75, 28.5], [106.97, 29.03], [107.32, 29.18], [107.47, 29.53], [107.82, 29.68], [107.97, 30.03], [108.5, 30.25], [108.75, 30.15], [109.0, 30.25], [109.25, 30.15], [109.5, 30.25], [109.75, 30.15], [109.82, 30.18], [109.88, 30.3], [109.47, 30.47], [109.25, 31.0], [109.47, 31.53], [110.0, 31.75], [110.25, 31.65], [110.5, 31.75], [111.03, 31.53], [111.18, 31.18], [111.53, 31.03], [111.75, 30.5], [111.65, 30.25], [111.75, 30.0], [111.53, 29.47], [111.18, 29.32], [111.03, 28.97], [110.5, 28.75], [110.25, 28.85], [110.18, 28.82], [110.03, 28.47], [109.68, 28.32], [109.65, 28.25], [109.75, 28.0], [109.53, 27.47], [109.18, 27.32], [109.15, 27.25], [109.25, 27.0], [109.03, 26.47], [108.5, 26.25], [108.25, 26.35], [108.0, 26.25], [107.75, 26.35], [107.5, 26.25], [106.97, 26.47], [106.82, 26.82], [106.47, 26.97], [106.25, 27.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.883831998280584}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.782232129272335}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.316487361793861, 2.247360801894274, 2.4369209356156034]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.1898565150295894, 0.29645653299547803, 1.038206321936741]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.944577670607663, -6.212354156389111, -6.1897645608202305]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.222827462271653, -7.664516445954803, -7.883831998280584]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3618051419116153, -1.7077084147655746, -1.6373310979557225]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.485305351096289, -1.923923432836185, -1.7598127752647623]}}