{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:35.286205", "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-Jan-27_to_2011-Jan-31_102.0_44.0"}, "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": 2011010001371}, "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 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 31 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 103447.83252752459}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.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": 44.0}, "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": 102.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "102.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 100.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 104.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.25, 41.65], [103.5, 41.75], [104.03, 41.53], [104.18, 41.18], [104.53, 41.03], [104.75, 40.5], [104.53, 39.97], [104.0, 39.75], [103.75, 39.85], [103.68, 39.82], [103.53, 39.47], [103.0, 39.25], [102.75, 39.35], [102.5, 39.25], [102.25, 39.35], [102.0, 39.25], [101.47, 39.47], [101.25, 40.0], [101.35, 40.25], [101.32, 40.32], [101.0, 40.46], [100.5, 40.25], [99.97, 40.47], [99.75, 41.0], [99.97, 41.53], [100.5, 41.75], [101.0, 41.54], [101.5, 41.75], [101.75, 41.65], [102.0, 41.75], [102.25, 41.65], [102.5, 41.75], [102.75, 41.65], [103.0, 41.75], [103.25, 41.65]]], [[[101.0, 44.25], [101.25, 44.15], [101.32, 44.18], [101.47, 44.53], [102.0, 44.75], [102.25, 44.65], [102.5, 44.75], [102.75, 44.65], [103.0, 44.75], [103.25, 44.65], [103.5, 44.75], [104.03, 44.53], [104.18, 44.18], [104.53, 44.03], [104.75, 43.5], [104.53, 42.97], [104.0, 42.75], [103.75, 42.85], [103.5, 42.75], [103.25, 42.85], [103.18, 42.82], [103.15, 42.75], [103.25, 42.5], [103.03, 41.97], [102.5, 41.75], [102.0, 41.96], [101.5, 41.75], [101.25, 41.85], [101.0, 41.75], [100.47, 41.97], [100.25, 42.5], [100.46, 43.0], [100.25, 43.5], [100.47, 44.03], [101.0, 44.25]]]]}, "2011-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.85, 41.75], [99.75, 42.0], [99.85, 42.25], [99.75, 42.5], [99.97, 43.03], [100.38, 43.2], [100.25, 43.5], [100.35, 43.75], [100.25, 44.0], [100.47, 44.53], [101.0, 44.75], [101.25, 44.65], [101.5, 44.75], [101.75, 44.65], [102.0, 44.75], [102.25, 44.65], [102.5, 44.75], [102.75, 44.65], [103.0, 44.75], [103.25, 44.65], [103.5, 44.75], [104.03, 44.53], [104.18, 44.18], [104.53, 44.03], [104.75, 43.5], [104.53, 42.97], [104.0, 42.75], [103.75, 42.85], [103.5, 42.75], [103.25, 42.85], [103.18, 42.82], [103.15, 42.75], [103.25, 42.5], [103.04, 42.0], [103.18, 41.68], [103.25, 41.65], [103.32, 41.68], [103.47, 42.03], [104.0, 42.25], [104.53, 42.03], [104.75, 41.5], [104.65, 41.25], [104.75, 41.0], [104.65, 40.75], [104.75, 40.5], [104.54, 40.0], [104.75, 39.5], [104.53, 38.97], [104.0, 38.75], [103.75, 38.85], [103.5, 38.75], [102.97, 38.97], [102.82, 39.32], [102.75, 39.35], [102.5, 39.25], [102.25, 39.35], [102.0, 39.25], [101.47, 39.47], [101.25, 40.0], [101.35, 40.25], [101.32, 40.32], [101.25, 40.35], [101.0, 40.25], [100.75, 40.35], [100.5, 40.25], [99.97, 40.47], [99.75, 41.0], [99.85, 41.25], [99.75, 41.5], [99.85, 41.75]]]]}, "2011-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[99.85, 41.75], [99.75, 42.0], [99.85, 42.25], [99.75, 42.5], [99.97, 43.03], [100.38, 43.2], [100.25, 43.5], [100.35, 43.75], [100.25, 44.0], [100.47, 44.53], [101.0, 44.75], [101.25, 44.65], [101.5, 44.75], [101.75, 44.65], [102.0, 44.75], [102.25, 44.65], [102.5, 44.75], [102.75, 44.65], [103.0, 44.75], [103.25, 44.65], [103.5, 44.75], [104.03, 44.53], [104.18, 44.18], [104.53, 44.03], [104.75, 43.5], [104.53, 42.97], [104.0, 42.75], [103.75, 42.85], [103.5, 42.75], [103.25, 42.85], [103.18, 42.82], [103.15, 42.75], [103.25, 42.5], [103.04, 42.0], [103.18, 41.68], [103.25, 41.65], [103.32, 41.68], [103.47, 42.03], [104.0, 42.25], [104.53, 42.03], [104.75, 41.5], [104.65, 41.25], [104.75, 41.0], [104.65, 40.75], [104.75, 40.5], [104.54, 40.0], [104.75, 39.5], [104.53, 38.97], [104.0, 38.75], [103.75, 38.85], [103.5, 38.75], [102.97, 38.97], [102.82, 39.32], [102.75, 39.35], [102.5, 39.25], [102.25, 39.35], [102.0, 39.25], [101.47, 39.47], [101.25, 40.0], [101.35, 40.25], [101.32, 40.32], [101.25, 40.35], [101.0, 40.25], [100.75, 40.35], [100.5, 40.25], [99.97, 40.47], [99.75, 41.0], [99.85, 41.25], [99.75, 41.5], [99.85, 41.75]]]]}, "2011-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.53, 38.97], [104.0, 38.75], [103.75, 38.85], [103.5, 38.75], [102.97, 38.97], [102.75, 39.5], [102.97, 40.03], [103.5, 40.25], [103.75, 40.15], [104.0, 40.25], [104.53, 40.03], [104.75, 39.5], [104.53, 38.97]]], [[[104.75, 41.5], [104.65, 41.25], [104.75, 41.0], [104.53, 40.47], [104.0, 40.25], [103.47, 40.47], [103.25, 41.0], [103.35, 41.25], [103.25, 41.5], [103.47, 42.03], [104.0, 42.25], [104.53, 42.03], [104.75, 41.5]]], [[[99.85, 42.25], [99.75, 42.5], [99.97, 43.03], [100.5, 43.25], [100.93, 43.07], [100.82, 43.32], [100.47, 43.47], [100.25, 44.0], [100.47, 44.53], [101.0, 44.75], [101.25, 44.65], [101.5, 44.75], [101.75, 44.65], [102.0, 44.75], [102.53, 44.53], [102.75, 44.0], [102.63, 43.7], [103.03, 43.53], [103.25, 43.0], [103.03, 42.47], [102.5, 42.25], [103.03, 42.03], [103.25, 41.5], [103.03, 40.97], [102.5, 40.75], [102.25, 40.85], [102.0, 40.75], [101.75, 40.85], [101.68, 40.82], [101.53, 40.47], [101.0, 40.25], [100.75, 40.35], [100.5, 40.25], [99.97, 40.47], [99.75, 41.0], [99.85, 41.25], [99.75, 41.5], [99.85, 41.75], [99.75, 42.0], [99.85, 42.25]], [[102.07, 42.43], [102.18, 42.18], [102.25, 42.15], [102.5, 42.25], [102.07, 42.43]], [[101.8, 42.88], [101.5, 42.75], [101.93, 42.57], [101.8, 42.88]], [[101.07, 42.93], [101.2, 42.63], [101.5, 42.75], [101.07, 42.93]]]]}, "2011-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[100.47, 43.47], [100.25, 44.0], [100.47, 44.53], [101.0, 44.75], [101.25, 44.65], [101.5, 44.75], [101.75, 44.65], [102.0, 44.75], [102.53, 44.53], [102.75, 44.0], [102.53, 43.47], [102.0, 43.25], [101.75, 43.35], [101.5, 43.25], [101.25, 43.35], [101.0, 43.25], [100.47, 43.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.823785141350555}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.905043531384429}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-18.122049580050458, -17.619291310830704, -17.530358748387698, -16.742259279603388, -20.22199255947018]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-24.204334394185963, -23.642414141902577, -23.490139599788534, -22.770642388299706, -21.45462325402039]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.840852514646349, -6.933177301683922, -6.974521088824208, -6.7509779557184775, -7.058532428560464]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.398451560003508, -9.27951900904904, -9.823785141350555, -9.494315078632013, -8.12224535152896]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.573255106179589, -1.5861062139413236, -1.5952326329473772, -1.564589787134545, -1.703837823268582]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1746097011106027, -2.082246402373774, -2.2582078362832374, -2.1807888292929904, -1.9567798647587387]}}