{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:08.864903", "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-Apr-09_to_2012-Apr-12_207.0_19.5"}, "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": 2012040000604}, "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": "April 09 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2012"}, "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": 69866.4281447224}, "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": ["N.Pacific-Ocean"]}, "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": ["North Pacific Ocean"]}, "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": 19.5}, "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": 207.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "207.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 202.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 211.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 20.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-155.75, 20.0], [-155.53, 20.53], [-155.0, 20.75], [-154.47, 20.53], [-154.32, 20.18], [-154.25, 20.15], [-154.0, 20.25], [-153.75, 20.15], [-153.5, 20.25], [-153.25, 20.15], [-153.0, 20.25], [-152.75, 20.15], [-152.68, 20.18], [-152.53, 20.53], [-152.0, 20.75], [-151.75, 20.65], [-151.5, 20.75], [-151.25, 20.65], [-151.0, 20.75], [-150.75, 20.65], [-150.5, 20.75], [-150.25, 20.65], [-150.0, 20.75], [-149.75, 20.65], [-149.5, 20.75], [-149.25, 20.65], [-149.0, 20.75], [-148.75, 20.65], [-148.5, 20.75], [-147.97, 20.53], [-147.75, 20.0], [-147.97, 19.47], [-148.5, 19.25], [-148.75, 19.35], [-149.0, 19.25], [-149.25, 19.35], [-149.32, 19.32], [-149.47, 18.97], [-150.0, 18.75], [-150.25, 18.85], [-150.5, 18.75], [-150.75, 18.85], [-151.0, 18.75], [-151.25, 18.85], [-151.5, 18.75], [-151.75, 18.85], [-152.0, 18.75], [-152.25, 18.85], [-152.5, 18.75], [-152.75, 18.85], [-153.0, 18.75], [-153.25, 18.85], [-153.5, 18.75], [-153.75, 18.85], [-154.0, 18.75], [-154.25, 18.85], [-154.5, 18.75], [-155.03, 18.97], [-155.18, 19.32], [-155.53, 19.47], [-155.75, 20.0]]]]}, "2012-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-157.53, 18.97], [-157.75, 19.5], [-157.53, 20.03], [-157.0, 20.25], [-156.75, 20.15], [-156.5, 20.25], [-155.97, 20.03], [-155.82, 19.68], [-155.75, 19.65], [-155.68, 19.68], [-155.65, 19.75], [-155.75, 20.0], [-155.53, 20.53], [-155.0, 20.75], [-154.47, 20.53], [-154.32, 20.18], [-154.25, 20.15], [-154.0, 20.25], [-153.75, 20.15], [-153.5, 20.25], [-153.25, 20.15], [-153.0, 20.25], [-152.75, 20.15], [-152.68, 20.18], [-152.53, 20.53], [-152.0, 20.75], [-151.75, 20.65], [-151.5, 20.75], [-151.25, 20.65], [-151.0, 20.75], [-150.75, 20.65], [-150.5, 20.75], [-150.25, 20.65], [-150.0, 20.75], [-149.75, 20.65], [-149.5, 20.75], [-149.25, 20.65], [-149.0, 20.75], [-148.75, 20.65], [-148.5, 20.75], [-147.97, 20.53], [-147.75, 20.0], [-147.97, 19.47], [-148.5, 19.25], [-148.75, 19.35], [-149.0, 19.25], [-149.25, 19.35], [-149.32, 19.32], [-149.47, 18.97], [-150.0, 18.75], [-150.25, 18.85], [-150.5, 18.75], [-150.75, 18.85], [-151.0, 18.75], [-151.25, 18.85], [-151.5, 18.75], [-151.75, 18.85], [-152.0, 18.75], [-152.25, 18.85], [-152.5, 18.75], [-152.75, 18.85], [-153.0, 18.75], [-153.25, 18.85], [-153.5, 18.75], [-153.75, 18.85], [-154.0, 18.75], [-154.25, 18.85], [-154.5, 18.75], [-154.75, 18.85], [-154.82, 18.82], [-154.97, 18.47], [-155.5, 18.25], [-155.75, 18.35], [-156.0, 18.25], [-156.53, 18.47], [-156.68, 18.82], [-156.75, 18.85], [-157.0, 18.75], [-157.53, 18.97]]]]}, "2012-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-157.53, 18.97], [-157.75, 19.5], [-157.53, 20.03], [-157.0, 20.25], [-156.75, 20.15], [-156.5, 20.25], [-155.97, 20.03], [-155.82, 19.68], [-155.75, 19.65], [-155.68, 19.68], [-155.65, 19.75], [-155.75, 20.0], [-155.53, 20.53], [-155.0, 20.75], [-154.47, 20.53], [-154.32, 20.18], [-154.25, 20.15], [-154.0, 20.25], [-153.75, 20.15], [-153.5, 20.25], [-153.25, 20.15], [-153.0, 20.25], [-152.75, 20.15], [-152.68, 20.18], 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-2.0446064286701358}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.3203783666002664}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.289677985876494, 21.431387907298927, 21.55934265628315, 21.77826656968591]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.87657576257658, 19.680309369243787, 19.49196683948196, 20.021051197896952]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5070994822408466, -1.3564051942300377, -1.2193360084211686, -1.121645520201548]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7615963154142378, -1.8515361738677143, -2.0446064286701358, -1.5121464598852867]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.939163331458161, -1.8274224895561846, -1.6524936139457473, -1.5292151194686876]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2513283992936857, -2.414205956925038, -2.2147557061376197, -1.7931283816880168]}}