{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:38.201843", "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-Aug-22_to_2015-Aug-24_256.5_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": 2015080000836}, "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": "August 22 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 24 2015"}, "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": 83846.96769957805}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America", "W.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": 256.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "256.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 253.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 257.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 44.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.03, 44.97], [-107.25, 45.5], [-107.03, 46.03], [-106.5, 46.25], [-106.25, 46.15], [-106.12, 46.2], [-106.25, 46.5], [-106.03, 47.03], [-105.68, 47.18], [-105.65, 47.25], [-105.75, 47.5], [-105.53, 48.03], [-105.18, 48.18], [-105.03, 48.53], [-104.5, 48.75], [-103.97, 48.53], [-103.82, 48.18], [-103.47, 48.03], [-103.32, 47.68], [-103.25, 47.65], [-103.0, 47.75], [-102.47, 47.53], [-102.25, 47.0], [-102.35, 46.75], [-102.25, 46.5], [-102.35, 46.25], [-102.25, 46.0], [-102.35, 45.75], [-102.25, 45.5], [-102.35, 45.25], [-102.25, 45.0], [-102.35, 44.75], [-102.25, 44.5], [-102.47, 43.97], [-103.0, 43.75], [-103.25, 43.85], [-103.5, 43.75], [-103.75, 43.85], [-104.0, 43.75], [-104.25, 43.85], [-104.5, 43.75], [-104.75, 43.85], [-105.0, 43.75], [-105.53, 43.97], [-105.68, 44.32], [-106.03, 44.47], [-106.18, 44.82], [-106.25, 44.85], [-106.5, 44.75], [-107.03, 44.97]]]]}, "2015-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.03, 44.97], [-107.25, 45.5], [-107.03, 46.03], [-106.5, 46.25], [-106.25, 46.15], [-106.12, 46.2], [-106.25, 46.5], [-106.03, 47.03], [-105.68, 47.18], [-105.65, 47.25], [-105.75, 47.5], [-105.53, 48.03], [-105.18, 48.18], [-105.03, 48.53], [-104.5, 48.75], [-103.97, 48.53], [-103.82, 48.18], [-103.47, 48.03], [-103.32, 47.68], [-103.25, 47.65], [-103.0, 47.75], [-102.47, 47.53], [-102.25, 47.0], [-102.35, 46.75], [-102.25, 46.5], [-102.35, 46.25], [-102.25, 46.0], [-102.35, 45.75], [-102.25, 45.5], [-102.35, 45.25], [-102.25, 45.0], [-102.35, 44.75], [-102.25, 44.5], [-102.47, 43.97], [-103.0, 43.75], [-103.25, 43.85], [-103.5, 43.75], [-103.75, 43.85], [-104.0, 43.75], [-104.25, 43.85], [-104.5, 43.75], [-104.75, 43.85], [-105.0, 43.75], [-105.53, 43.97], [-105.68, 44.32], [-106.03, 44.47], [-106.18, 44.82], [-106.25, 44.85], [-106.5, 44.75], [-107.03, 44.97]]]]}, "2015-08-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-107.03, 44.97], [-107.25, 45.5], [-107.03, 46.03], [-106.5, 46.25], [-106.25, 46.15], [-106.12, 46.2], [-106.25, 46.5], [-106.03, 47.03], [-105.68, 47.18], [-105.65, 47.25], [-105.75, 47.5], [-105.53, 48.03], [-105.18, 48.18], [-105.03, 48.53], [-104.5, 48.75], [-103.97, 48.53], [-103.82, 48.18], [-103.47, 48.03], [-103.32, 47.68], [-103.25, 47.65], [-103.0, 47.75], [-102.47, 47.53], [-102.25, 47.0], [-102.35, 46.75], [-102.25, 46.5], [-102.35, 46.25], [-102.25, 46.0], [-102.35, 45.75], [-102.25, 45.5], [-102.35, 45.25], [-102.25, 45.0], [-102.35, 44.75], [-102.25, 44.5], [-102.47, 43.97], [-103.0, 43.75], [-103.25, 43.85], [-103.5, 43.75], [-103.75, 43.85], [-104.0, 43.75], [-104.25, 43.85], [-104.5, 43.75], [-104.75, 43.85], [-105.0, 43.75], [-105.53, 43.97], [-105.68, 44.32], [-106.03, 44.47], [-106.18, 44.82], [-106.25, 44.85], [-106.5, 44.75], [-107.03, 44.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.738803202835584}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.170246015488401}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.596015625722032, 12.02534274512334, 15.196900805696487]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.855823850111392, 10.153458341010321, 13.883405270134915]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.810000873683482, -9.423840589916482, -6.276896582865252]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.0451892741435245, -10.738803202835584, -7.512847295280267]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.610838085988495, -2.492091931608984, -1.6174654628393725]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8460054053535306, -2.7200750424808646, -1.9357992438913032]}}