{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:57.102658", "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": "2015-May-04_to_2015-May-12_121.0_45.0"}, "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": 2015050000253}, "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": "May 04 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 12 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 272206.8091696743}, "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", "Mongolia", "Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "E.Siberia"]}, "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": 45.0}, "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": 121.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "121.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 115.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 128.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 51.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-05-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.97, 49.03], [125.32, 49.18], [125.35, 49.25], [125.25, 49.5], [125.47, 50.03], [125.82, 50.18], [125.97, 50.53], [126.5, 50.75], [126.75, 50.65], [127.0, 50.75], [127.25, 50.65], [127.5, 50.75], [127.75, 50.65], [128.0, 50.75], [128.53, 50.53], [128.75, 50.0], [128.53, 49.47], [128.0, 49.25], [127.75, 49.35], [127.68, 49.32], [127.53, 48.97], [127.13, 48.8], [127.18, 48.68], [127.53, 48.53], [127.75, 48.0], [127.53, 47.47], [127.0, 47.25], [126.75, 47.35], [126.5, 47.25], [126.25, 47.35], [126.0, 47.25], [125.75, 47.35], [125.5, 47.25], [124.97, 47.47], [124.75, 48.0], [124.85, 48.25], [124.75, 48.5], [124.97, 49.03]]]]}, "2015-05-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.85, 48.25], [119.75, 48.5], [119.97, 49.03], [120.32, 49.18], [120.47, 49.53], [121.0, 49.75], [121.25, 49.65], [121.5, 49.75], [121.8, 49.63], [121.97, 50.03], [122.32, 50.18], [122.47, 50.53], [122.82, 50.68], [122.97, 51.03], [123.32, 51.18], [123.47, 51.53], [124.0, 51.75], [124.25, 51.65], [124.5, 51.75], [124.75, 51.65], [125.0, 51.75], [125.53, 51.53], [125.7, 51.13], [126.0, 51.25], [126.25, 51.15], [126.5, 51.25], [126.75, 51.15], [126.82, 51.18], [126.97, 51.53], [127.5, 51.75], [128.03, 51.53], [128.18, 51.18], [128.53, 51.03], [128.75, 50.5], [128.65, 50.25], [128.75, 50.0], [128.53, 49.47], [128.0, 49.25], [127.75, 49.35], [127.68, 49.32], [127.53, 48.97], [127.13, 48.8], [127.18, 48.68], [127.53, 48.53], [127.75, 48.0], [127.53, 47.47], [127.0, 47.25], [126.75, 47.35], [126.68, 47.32], [126.53, 46.97], [126.18, 46.82], [126.03, 46.47], [125.5, 46.25], [125.25, 46.35], [125.0, 46.25], [124.75, 46.35], [124.5, 46.25], [123.97, 46.47], [123.82, 46.82], [123.75, 46.85], [123.5, 46.75], [122.97, 46.97], [122.82, 47.32], [122.47, 47.47], [122.32, 47.82], [122.25, 47.85], [122.0, 47.75], [121.75, 47.85], [121.5, 47.75], [121.25, 47.85], [121.18, 47.82], [121.15, 47.75], [121.25, 47.5], [121.03, 46.97], [120.5, 46.75], [119.97, 46.97], [119.75, 47.5], [119.85, 47.75], [119.75, 48.0], [119.85, 48.25]], [[125.32, 49.18], [125.35, 49.25], [125.25, 49.5], [125.13, 49.2], [125.25, 49.15], [125.32, 49.18]], [[125.46, 50.0], [125.3, 50.38], [125.18, 50.32], [125.15, 50.25], [125.25, 50.0], [125.15, 49.75], [125.25, 49.5], [125.46, 50.0]], [[124.32, 48.68], [124.38, 48.8], [124.07, 48.93], [124.18, 48.68], [124.25, 48.65], [124.32, 48.68]], [[123.68, 49.32], [123.65, 49.25], [123.68, 49.18], [123.93, 49.07], [123.82, 49.32], [123.75, 49.35], [123.68, 49.32]]]]}, "2015-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.85, 48.25], [119.75, 48.5], [119.97, 49.03], [120.32, 49.18], [120.47, 49.53], [121.0, 49.75], [121.25, 49.65], [121.5, 49.75], [121.8, 49.63], [121.97, 50.03], [122.32, 50.18], [122.47, 50.53], [122.82, 50.68], [122.97, 51.03], [123.32, 51.18], [123.47, 51.53], [124.0, 51.75], [124.25, 51.65], [124.5, 51.75], [124.75, 51.65], [125.0, 51.75], [125.53, 51.53], [125.7, 51.13], [126.0, 51.25], [126.25, 51.15], [126.5, 51.25], [126.75, 51.15], [126.82, 51.18], [126.97, 51.53], [127.5, 51.75], [128.03, 51.53], [128.18, 51.18], [128.53, 51.03], [128.75, 50.5], [128.65, 50.25], [128.75, 50.0], [128.53, 49.47], [128.0, 49.25], [127.75, 49.35], [127.68, 49.32], [127.53, 48.97], [127.13, 48.8], [127.18, 48.68], [127.53, 48.53], [127.75, 48.0], [127.53, 47.47], [127.13, 47.3], [127.25, 47.0], [127.03, 46.47], [126.68, 46.32], [126.53, 45.97], [126.18, 45.82], [126.03, 45.47], [125.5, 45.25], [125.25, 45.35], [125.0, 45.25], [124.47, 45.47], [124.32, 45.82], [123.97, 45.97], [123.75, 46.5], [123.85, 46.75], [123.82, 46.82], [123.75, 46.85], [123.5, 46.75], [122.97, 46.97], [122.82, 47.32], [122.47, 47.47], [122.32, 47.82], [122.25, 47.85], [122.0, 47.75], [121.75, 47.85], [121.5, 47.75], [121.25, 47.85], [121.18, 47.82], [121.15, 47.75], [121.25, 47.5], [121.03, 46.97], [120.5, 46.75], [119.97, 46.97], [119.75, 47.5], [119.85, 47.75], [119.75, 48.0], [119.85, 48.25]], [[125.3, 50.38], [125.18, 50.32], [125.15, 50.25], [125.25, 50.0], [125.15, 49.75], [125.18, 49.68], [125.3, 49.63], [125.46, 50.0], [125.3, 50.38]]]]}, "2015-05-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.25, 47.5], [115.47, 48.03], [116.0, 48.25], [116.25, 48.15], [116.5, 48.25], [116.75, 48.15], [117.0, 48.25], [117.53, 48.03], [117.68, 47.68], [117.75, 47.65], [118.0, 47.75], [118.25, 47.65], [118.5, 47.75], [119.03, 47.53], [119.25, 47.0], [119.13, 46.7], [119.25, 46.65], [119.32, 46.68], [119.47, 47.03], [119.88, 47.2], [119.75, 47.5], [119.85, 47.75], [119.75, 48.0], [119.85, 48.25], [119.75, 48.5], [119.97, 49.03], [120.32, 49.18], [120.47, 49.53], [121.0, 49.75], [121.25, 49.65], [121.5, 49.75], [121.8, 49.63], [121.97, 50.03], [122.32, 50.18], [122.47, 50.53], [122.82, 50.68], [122.97, 51.03], [123.32, 51.18], [123.47, 51.53], [124.0, 51.75], [124.25, 51.65], [124.5, 51.75], [124.75, 51.65], [125.0, 51.75], [125.53, 51.53], [125.7, 51.13], [126.0, 51.25], [126.25, 51.15], [126.5, 51.25], [126.75, 51.15], [126.82, 51.18], [126.97, 51.53], [127.5, 51.75], [128.03, 51.53], [128.18, 51.18], [128.53, 51.03], [128.75, 50.5], [128.65, 50.25], [128.75, 50.0], [128.53, 49.47], [128.0, 49.25], [127.75, 49.35], [127.68, 49.32], [127.53, 48.97], [127.0, 48.75], [126.75, 48.85], [126.5, 48.75], [126.25, 48.85], [126.13, 48.8], [126.18, 48.68], [126.53, 48.53], [126.75, 48.0], [126.65, 47.75], [126.68, 47.68], [127.03, 47.53], [127.25, 47.0], [127.03, 46.47], [126.68, 46.32], [126.53, 45.97], [126.18, 45.82], [126.03, 45.47], [125.5, 45.25], [125.25, 45.35], [125.18, 45.32], [125.03, 44.97], [124.68, 44.82], [124.53, 44.47], [124.18, 44.32], [124.03, 43.97], [123.68, 43.82], [123.53, 43.47], [123.18, 43.32], [123.03, 42.97], [122.5, 42.75], [122.25, 42.85], [122.0, 42.75], [121.75, 42.85], [121.5, 42.75], [120.97, 42.97], [120.82, 43.32], [120.47, 43.47], [120.3, 43.88], [120.0, 43.75], [119.47, 43.97], [119.32, 44.32], [118.97, 44.47], [118.82, 44.82], [118.75, 44.85], [118.5, 44.75], [118.25, 44.85], [118.0, 44.75], [117.47, 44.97], [117.32, 45.32], [116.97, 45.47], [116.82, 45.82], [116.75, 45.85], [116.5, 45.75], [115.97, 45.97], [115.75, 46.5], [115.85, 46.75], [115.82, 46.82], [115.47, 46.97], [115.25, 47.5]], [[122.0, 45.25], [122.5, 45.04], [122.82, 45.18], [122.85, 45.25], [122.75, 45.5], [122.85, 45.75], [122.75, 46.0], [122.85, 46.25], [122.75, 46.5], [122.96, 47.0], [122.82, 47.32], [122.47, 47.47], [122.32, 47.82], [122.25, 47.85], [122.0, 47.75], [121.75, 47.85], [121.5, 47.75], [121.25, 47.85], [121.18, 47.82], [121.15, 47.75], [121.25, 47.5], [121.13, 47.2], [121.53, 47.03], [121.68, 46.68], [122.03, 46.53], [122.25, 46.0], [122.03, 45.47], [121.68, 45.32], [121.65, 45.25], [121.68, 45.18], [121.75, 45.15], [122.0, 45.25]], [[125.46, 50.0], [125.3, 50.38], [125.18, 50.32], [125.15, 50.25], [125.25, 50.0], [125.15, 49.75], [125.18, 49.68], [125.3, 49.63], [125.46, 50.0]]]]}, "2015-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.25, 47.5], [115.47, 48.03], [116.0, 48.25], [116.25, 48.15], [116.5, 48.25], [116.75, 48.15], [117.0, 48.25], [117.53, 48.03], [117.68, 47.68], [117.75, 47.65], [118.0, 47.75], [118.25, 47.65], [118.5, 47.75], [119.03, 47.53], [119.25, 47.0], [119.13, 46.7], [119.25, 46.65], [119.32, 46.68], [119.47, 47.03], [119.88, 47.2], [119.75, 47.5], [119.96, 48.0], [119.75, 48.5], [119.97, 49.03], [120.5, 49.25], [120.75, 49.15], [121.0, 49.25], [121.25, 49.15], [121.5, 49.25], [121.75, 49.15], [121.82, 49.18], [121.97, 49.53], [122.5, 49.75], [123.0, 49.54], [123.5, 49.75], [124.03, 49.53], [124.18, 49.18], [124.25, 49.15], [124.32, 49.18], [124.47, 49.53], [125.0, 49.75], [125.53, 49.53], [125.75, 49.0], [125.65, 48.75], [125.68, 48.68], [125.75, 48.65], [126.0, 48.75], [126.53, 48.53], [126.75, 48.0], [126.65, 47.75], [126.68, 47.68], [127.03, 47.53], [127.25, 47.0], [127.03, 46.47], [126.68, 46.32], [126.53, 45.97], [126.18, 45.82], [126.03, 45.47], [125.5, 45.25], [125.25, 45.35], [125.18, 45.32], [125.03, 44.97], [124.68, 44.82], [124.53, 44.47], [124.18, 44.32], [124.03, 43.97], [123.68, 43.82], [123.53, 43.47], [123.18, 43.32], [123.03, 42.97], [122.5, 42.75], [122.25, 42.85], [122.0, 42.75], [121.75, 42.85], [121.5, 42.75], [120.97, 42.97], [120.82, 43.32], [120.47, 43.47], [120.3, 43.88], [120.0, 43.75], [119.47, 43.97], [119.32, 44.32], [118.97, 44.47], [118.82, 44.82], [118.75, 44.85], [118.5, 44.75], [118.25, 44.85], [118.0, 44.75], [117.47, 44.97], [117.32, 45.32], [116.97, 45.47], [116.82, 45.82], [116.75, 45.85], [116.5, 45.75], [115.97, 45.97], [115.75, 46.5], [115.85, 46.75], [115.82, 46.82], [115.47, 46.97], [115.25, 47.5]], [[122.0, 45.25], [122.5, 45.04], [122.82, 45.18], [122.85, 45.25], [122.75, 45.5], [122.85, 45.75], [122.75, 46.0], [122.85, 46.25], [122.75, 46.5], [122.96, 47.0], [122.82, 47.32], [122.47, 47.47], [122.32, 47.82], [122.25, 47.85], [122.0, 47.75], [121.75, 47.85], [121.5, 47.75], [121.25, 47.85], [121.13, 47.8], [121.25, 47.5], [121.13, 47.2], [121.53, 47.03], [121.68, 46.68], [122.03, 46.53], [122.25, 46.0], [122.03, 45.47], [121.68, 45.32], [121.65, 45.25], [121.68, 45.18], [121.75, 45.15], [122.0, 45.25]]]]}, "2015-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.25, 47.5], [115.47, 48.03], [116.0, 48.25], [116.25, 48.15], [116.5, 48.25], [116.75, 48.15], [117.0, 48.25], [117.53, 48.03], [117.68, 47.68], [117.75, 47.65], [118.0, 47.75], [118.25, 47.65], [118.5, 47.75], [119.03, 47.53], [119.25, 47.0], [119.13, 46.7], [119.25, 46.65], [119.32, 46.68], [119.47, 47.03], [120.0, 47.25], [120.25, 47.15], [120.5, 47.25], [120.75, 47.15], [121.0, 47.25], [121.53, 47.03], [121.68, 46.68], [122.03, 46.53], [122.25, 46.0], [122.03, 45.47], [121.68, 45.32], [121.65, 45.25], [121.68, 45.18], [121.75, 45.15], [122.0, 45.25], [122.5, 45.04], [122.82, 45.18], [122.85, 45.25], [122.75, 45.5], [122.85, 45.75], [122.75, 46.0], [122.85, 46.25], [122.75, 46.5], [122.97, 47.03], [123.5, 47.25], [124.03, 47.03], [124.25, 46.5], [124.15, 46.25], [124.18, 46.18], [124.25, 46.15], [124.32, 46.18], [124.47, 46.53], [125.0, 46.75], [125.53, 46.53], [125.75, 46.0], [125.53, 45.47], [125.18, 45.32], [125.03, 44.97], [124.68, 44.82], [124.53, 44.47], [124.18, 44.32], [124.03, 43.97], [123.68, 43.82], [123.53, 43.47], [123.18, 43.32], [123.03, 42.97], [122.5, 42.75], [122.25, 42.85], [122.0, 42.75], [121.75, 42.85], [121.5, 42.75], [120.97, 42.97], [120.82, 43.32], [120.47, 43.47], [120.3, 43.88], [120.0, 43.75], [119.47, 43.97], [119.32, 44.32], [118.97, 44.47], [118.82, 44.82], [118.75, 44.85], [118.5, 44.75], [118.25, 44.85], [118.0, 44.75], [117.47, 44.97], [117.32, 45.32], [116.97, 45.47], [116.82, 45.82], [116.75, 45.85], [116.5, 45.75], [115.97, 45.97], [115.75, 46.5], [115.85, 46.75], [115.82, 46.82], [115.47, 46.97], [115.25, 47.5]]]]}, "2015-05-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.25, 46.5], [116.47, 47.03], [117.0, 47.25], [117.53, 47.03], [117.68, 46.68], [117.75, 46.65], [118.0, 46.75], [118.25, 46.65], [118.5, 46.75], [118.75, 46.65], [119.0, 46.75], [119.53, 46.53], [119.7, 46.13], [120.0, 46.25], [120.25, 46.15], [120.5, 46.25], [121.03, 46.03], [121.18, 45.68], [121.53, 45.53], [121.75, 45.0], [121.65, 44.75], [121.75, 44.5], [121.65, 44.25], [121.75, 44.0], [121.53, 43.47], [121.0, 43.25], [120.75, 43.35], [120.5, 43.25], [119.97, 43.47], [119.82, 43.82], [119.47, 43.97], [119.32, 44.32], [118.97, 44.47], [118.82, 44.82], [118.75, 44.85], [118.5, 44.75], [118.25, 44.85], [118.0, 44.75], [117.47, 44.97], [117.32, 45.32], [116.97, 45.47], [116.82, 45.82], [116.47, 45.97], [116.25, 46.5]]]]}, "2015-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.75, 46.0], [116.97, 46.53], [117.5, 46.75], [117.75, 46.65], [118.0, 46.75], [118.25, 46.65], [118.5, 46.75], [118.75, 46.65], [119.0, 46.75], [119.53, 46.53], [119.7, 46.13], [120.0, 46.25], [120.25, 46.15], [120.5, 46.25], [121.03, 46.03], [121.18, 45.68], [121.53, 45.53], [121.75, 45.0], [121.65, 44.75], [121.75, 44.5], [121.65, 44.25], [121.75, 44.0], [121.53, 43.47], [121.0, 43.25], [120.75, 43.35], [120.5, 43.25], [119.97, 43.47], [119.82, 43.82], [119.47, 43.97], [119.32, 44.32], [118.97, 44.47], [118.82, 44.82], [118.75, 44.85], [118.5, 44.75], [118.25, 44.85], [118.0, 44.75], [117.47, 44.97], [117.32, 45.32], [116.97, 45.47], [116.75, 46.0]]]]}, "2015-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.85, 44.75], [119.75, 45.0], [119.85, 45.25], [119.75, 45.5], [119.97, 46.03], [120.5, 46.25], [121.03, 46.03], [121.18, 45.68], [121.53, 45.53], [121.75, 45.0], [121.65, 44.75], [121.75, 44.5], [121.65, 44.25], [121.75, 44.0], [121.53, 43.47], [121.0, 43.25], [120.75, 43.35], [120.5, 43.25], [119.97, 43.47], [119.75, 44.0], [119.85, 44.25], [119.75, 44.5], [119.85, 44.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.690686978837618}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.1707713971879405}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.266944327915326, 4.134639369725107, 3.9915761354409938, 4.3128125593135, 4.872033483965538, 6.8414068678250715, 5.898652474152414, 5.133797619976633, 8.599433003881643]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.631829238783837, -1.5048225436126472, 0.4058619080651056, -1.8837683116909716, -0.14747869138540182, 3.0895957266221217, 2.9617115021528093, 2.715117529704628, 6.969043055064333]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.557089678311043, -5.279002853765968, -5.837470905488627, -6.483345505435228, -6.818323563751009, -5.48102724115978, -6.2765327553328145, -7.529767385998907, -6.542518854480339]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.511254511180368, -7.368915997378849, -7.976934593075498, -9.690686978837618, -8.754225380353489, -6.071309670554001, -7.563894719026507, -8.444367615788167, -7.623716572953526]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5206709947731796, -1.3894807467436774, -1.5249344852437348, -1.6105850115824254, -1.714057831324873, -1.3572507667068365, -1.5135287400687574, -1.8655333249448576, -1.6678504946586246]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.821451805128831, -1.676378784589051, -2.091057632679431, -2.3282890069145887, -2.3074234082378213, -1.5082932527622523, -1.8419565846554804, -2.11420131432623, -1.9128989744715068]}}