{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:46.032903", "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": "2011-Feb-15_to_2011-Feb-18_74.5_38.0"}, "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": 2011020000818}, "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": "February 15 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 18 2011"}, "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": 53449.80752028513}, "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", "Kyrgyzstan", "Tajikistan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia", "W.C.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": 38.0}, "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": 74.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "74.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 72.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 76.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[74.5, 39.75], [75.03, 39.53], [75.25, 39.0], [75.13, 38.7], [75.53, 38.53], [75.75, 38.0], [75.57, 37.57], [76.0, 37.75], [76.53, 37.53], [76.75, 37.0], [76.53, 36.47], [76.0, 36.25], [75.47, 36.47], [75.25, 37.0], [75.43, 37.43], [75.0, 37.25], [74.75, 37.35], [74.5, 37.25], [73.97, 37.47], [73.75, 38.0], [73.96, 38.5], [73.75, 39.0], [73.97, 39.53], [74.5, 39.75]]], [[[71.75, 39.5], [71.97, 40.03], [72.5, 40.25], [73.03, 40.03], [73.25, 39.5], [73.13, 39.2], [73.53, 39.03], [73.75, 38.5], [73.53, 37.97], [73.18, 37.82], [73.03, 37.47], [72.5, 37.25], [71.97, 37.47], [71.75, 38.0], [71.85, 38.25], [71.75, 38.5], [71.96, 39.0], [71.75, 39.5]]]]}, "2011-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[71.96, 39.0], [71.75, 39.5], [71.97, 40.03], [72.5, 40.25], [72.75, 40.15], [73.0, 40.25], [73.25, 40.15], [73.5, 40.25], [74.03, 40.03], [74.2, 39.63], [74.5, 39.75], [75.03, 39.53], [75.18, 39.18], [75.53, 39.03], [75.75, 38.5], [75.65, 38.25], [75.68, 38.18], [76.03, 38.03], [76.18, 37.68], [76.53, 37.53], [76.75, 37.0], [76.53, 36.47], [76.0, 36.25], [75.5, 36.46], [75.0, 36.25], [74.47, 36.47], [74.32, 36.82], [74.25, 36.85], [74.0, 36.75], [73.75, 36.85], [73.5, 36.75], [73.25, 36.85], [73.0, 36.75], [72.47, 36.97], [72.32, 37.32], [71.97, 37.47], [71.75, 38.0], [71.85, 38.25], [71.75, 38.5], [71.96, 39.0]]]]}, "2011-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[71.96, 39.0], [71.75, 39.5], [71.97, 40.03], [72.5, 40.25], [72.75, 40.15], [73.0, 40.25], [73.25, 40.15], [73.5, 40.25], [74.03, 40.03], [74.2, 39.63], [74.5, 39.75], [75.03, 39.53], [75.18, 39.18], [75.53, 39.03], [75.75, 38.5], [75.65, 38.25], [75.68, 38.18], [76.03, 38.03], [76.18, 37.68], [76.53, 37.53], [76.75, 37.0], [76.53, 36.47], [76.0, 36.25], [75.5, 36.46], [75.0, 36.25], [74.47, 36.47], [74.32, 36.82], [74.25, 36.85], [74.0, 36.75], [73.75, 36.85], [73.5, 36.75], [73.25, 36.85], [73.0, 36.75], [72.47, 36.97], [72.32, 37.32], [71.97, 37.47], [71.75, 38.0], [71.85, 38.25], [71.75, 38.5], [71.96, 39.0]]]]}, "2011-02-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[71.97, 39.03], [72.38, 39.2], [72.25, 39.5], [72.47, 40.03], [73.0, 40.25], [73.25, 40.15], [73.5, 40.25], [74.03, 40.03], [74.2, 39.63], [74.5, 39.75], [75.03, 39.53], [75.18, 39.18], [75.53, 39.03], [75.75, 38.5], [75.65, 38.25], [75.68, 38.18], [76.03, 38.03], [76.18, 37.68], [76.53, 37.53], [76.75, 37.0], [76.53, 36.47], [76.0, 36.25], [75.5, 36.46], [75.0, 36.25], [74.47, 36.47], [74.32, 36.82], [74.25, 36.85], [74.0, 36.75], [73.75, 36.85], [73.5, 36.75], [73.25, 36.85], [73.0, 36.75], [72.47, 36.97], [72.32, 37.32], [71.97, 37.47], [71.75, 38.0], [71.85, 38.25], [71.75, 38.5], [71.97, 39.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.585202211409722}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.924106459101893}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-25.151899895128054, -25.981238159139394, -26.02739682896123, -26.110404898522347]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-30.825952754121744, -29.760293413731773, -28.92182618143309, -29.01584344899132]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.852133483605712, -7.020667052752587, -6.980414509581169, -6.791376632107133]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.416174055242294, -9.585202211409722, -9.162356037624221, -8.710662848107347]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5857922599258565, -1.761434685787681, -1.7774662863870878, -1.7016410328373472]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0864858733418514, -2.2577128937654454, -2.2538225978920514, -2.1026771448156585]}}