{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:58.919530", "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-Mar-27_to_2011-Mar-30_260.0_37.5"}, "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": 2011030001342}, "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": "March 27 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 30 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": 177417.02111188183}, "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"]}, "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": 37.5}, "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": 260.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "260.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 258.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 263.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.65, 37.75], [-101.75, 38.0], [-101.65, 38.25], [-101.75, 38.5], [-101.54, 39.0], [-101.75, 39.5], [-101.65, 39.75], [-101.75, 40.0], [-101.53, 40.53], [-101.18, 40.68], [-101.03, 41.03], [-100.5, 41.25], [-100.25, 41.15], [-100.0, 41.25], [-99.47, 41.03], [-99.32, 40.68], [-99.25, 40.65], [-99.0, 40.75], [-98.47, 40.53], [-98.32, 40.18], [-98.25, 40.15], [-98.0, 40.25], [-97.47, 40.03], [-97.25, 39.5], [-97.47, 38.97], [-97.82, 38.82], [-97.85, 38.75], [-97.82, 38.68], [-97.47, 38.53], [-97.25, 38.0], [-97.47, 37.47], [-97.82, 37.32], [-97.97, 36.97], [-98.32, 36.82], [-98.47, 36.47], [-98.82, 36.32], [-98.85, 36.25], [-98.75, 36.0], [-98.87, 35.7], [-98.75, 35.65], [-98.5, 35.75], [-98.25, 35.65], [-98.0, 35.75], [-97.75, 35.65], [-97.5, 35.75], [-97.25, 35.65], [-97.0, 35.75], [-96.47, 35.53], [-96.25, 35.0], [-96.47, 34.47], [-96.82, 34.32], [-96.97, 33.97], [-97.32, 33.82], [-97.47, 33.47], [-98.0, 33.25], [-98.25, 33.35], [-98.5, 33.25], [-99.03, 33.47], [-99.18, 33.82], [-99.25, 33.85], [-99.5, 33.75], [-99.75, 33.85], [-100.0, 33.75], [-100.53, 33.97], [-100.68, 34.32], [-101.03, 34.47], [-101.25, 35.0], [-101.04, 35.5], [-101.25, 36.0], [-101.12, 36.3], [-101.53, 36.47], [-101.75, 37.0], [-101.65, 37.25], [-101.75, 37.5], [-101.65, 37.75]]]]}, "2011-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.53, 35.53], [-101.12, 35.7], [-101.25, 36.0], [-101.12, 36.3], [-101.53, 36.47], [-101.75, 37.0], [-101.65, 37.25], [-101.75, 37.5], [-101.65, 37.75], [-101.75, 38.0], [-101.65, 38.25], [-101.75, 38.5], [-101.54, 39.0], [-101.75, 39.5], [-101.65, 39.75], [-101.75, 40.0], [-101.53, 40.53], [-101.18, 40.68], [-101.03, 41.03], [-100.5, 41.25], [-100.25, 41.15], [-100.0, 41.25], [-99.47, 41.03], [-99.32, 40.68], [-99.25, 40.65], [-99.0, 40.75], [-98.47, 40.53], [-98.32, 40.18], [-98.25, 40.15], [-98.0, 40.25], [-97.47, 40.03], [-97.25, 39.5], [-97.47, 38.97], [-97.82, 38.82], [-97.85, 38.75], [-97.82, 38.68], [-97.47, 38.53], [-97.25, 38.0], [-97.47, 37.47], [-97.82, 37.32], [-97.97, 36.97], [-98.32, 36.82], [-98.47, 36.47], [-98.82, 36.32], [-98.85, 36.25], [-98.75, 36.0], [-98.87, 35.7], [-98.75, 35.65], [-98.5, 35.75], [-98.25, 35.65], [-98.0, 35.75], [-97.75, 35.65], [-97.5, 35.75], [-97.25, 35.65], [-97.0, 35.75], [-96.47, 35.53], [-96.25, 35.0], [-96.47, 34.47], [-96.82, 34.32], [-96.97, 33.97], [-97.32, 33.82], [-97.35, 33.75], [-97.25, 33.5], [-97.47, 32.97], [-98.0, 32.75], [-98.53, 32.97], [-98.68, 33.32], [-98.75, 33.35], [-99.0, 33.25], [-99.25, 33.35], [-99.5, 33.25], [-99.75, 33.35], [-100.0, 33.25], [-100.53, 33.47], [-100.68, 33.82], [-100.75, 33.85], [-101.0, 33.75], [-101.53, 33.97], [-101.75, 34.5], [-101.65, 34.75], [-101.75, 35.0], [-101.53, 35.53]]]]}, "2011-03-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.53, 35.53], [-101.12, 35.7], [-101.25, 36.0], [-101.12, 36.3], [-101.53, 36.47], [-101.75, 37.0], [-101.65, 37.25], [-101.75, 37.5], [-101.65, 37.75], [-101.75, 38.0], [-101.65, 38.25], [-101.75, 38.5], [-101.54, 39.0], [-101.75, 39.5], [-101.65, 39.75], [-101.75, 40.0], [-101.53, 40.53], [-101.18, 40.68], [-101.03, 41.03], [-100.5, 41.25], [-100.25, 41.15], [-100.0, 41.25], [-99.47, 41.03], [-99.32, 40.68], [-99.25, 40.65], [-99.0, 40.75], [-98.47, 40.53], [-98.32, 40.18], [-98.25, 40.15], [-98.0, 40.25], [-97.47, 40.03], [-97.25, 39.5], [-97.47, 38.97], [-97.82, 38.82], [-97.85, 38.75], [-97.82, 38.68], [-97.47, 38.53], [-97.25, 38.0], [-97.47, 37.47], [-97.82, 37.32], [-97.97, 36.97], [-98.32, 36.82], [-98.47, 36.47], [-98.82, 36.32], [-98.85, 36.25], [-98.75, 36.0], [-98.87, 35.7], [-98.75, 35.65], [-98.5, 35.75], [-98.25, 35.65], [-98.0, 35.75], [-97.75, 35.65], [-97.5, 35.75], [-97.25, 35.65], [-97.0, 35.75], [-96.47, 35.53], [-96.25, 35.0], [-96.47, 34.47], [-96.82, 34.32], [-96.97, 33.97], [-97.32, 33.82], [-97.35, 33.75], [-97.25, 33.5], [-97.47, 32.97], [-98.0, 32.75], [-98.53, 32.97], [-98.68, 33.32], [-98.75, 33.35], [-99.0, 33.25], [-99.25, 33.35], [-99.5, 33.25], [-99.75, 33.35], [-100.0, 33.25], [-100.53, 33.47], [-100.68, 33.82], [-100.75, 33.85], [-101.0, 33.75], [-101.53, 33.97], [-101.75, 34.5], [-101.65, 34.75], [-101.75, 35.0], [-101.53, 35.53]]]]}, "2011-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.53, 35.53], [-101.12, 35.7], [-101.25, 36.0], [-101.04, 36.5], [-101.25, 37.0], [-101.03, 37.53], [-100.68, 37.68], [-100.65, 37.75], [-100.75, 38.0], [-100.65, 38.25], [-100.75, 38.5], [-100.53, 39.03], [-100.18, 39.18], [-100.03, 39.53], [-99.5, 39.75], [-99.25, 39.65], [-99.18, 39.68], [-99.03, 40.03], [-98.5, 40.25], [-98.25, 40.15], [-98.0, 40.25], [-97.47, 40.03], [-97.25, 39.5], [-97.47, 38.97], [-97.82, 38.82], [-97.85, 38.75], [-97.82, 38.68], [-97.47, 38.53], [-97.25, 38.0], [-97.47, 37.47], [-97.82, 37.32], [-97.97, 36.97], [-98.32, 36.82], [-98.47, 36.47], [-98.82, 36.32], [-98.85, 36.25], [-98.75, 36.0], [-98.87, 35.7], [-98.75, 35.65], [-98.5, 35.75], [-98.25, 35.65], [-98.0, 35.75], [-97.75, 35.65], [-97.5, 35.75], [-97.25, 35.65], [-97.0, 35.75], [-96.47, 35.53], [-96.25, 35.0], [-96.47, 34.47], [-96.82, 34.32], [-96.97, 33.97], [-97.32, 33.82], [-97.35, 33.75], [-97.25, 33.5], [-97.47, 32.97], [-98.0, 32.75], [-98.53, 32.97], [-98.68, 33.32], [-98.75, 33.35], [-99.0, 33.25], [-99.25, 33.35], [-99.5, 33.25], [-99.75, 33.35], [-100.0, 33.25], [-100.53, 33.47], [-100.68, 33.82], [-100.75, 33.85], [-101.0, 33.75], [-101.53, 33.97], [-101.75, 34.5], [-101.65, 34.75], [-101.75, 35.0], [-101.53, 35.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.32502896060555}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.911799986939311}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.1596141772461124, 2.219419708843702, 3.772115047330999, 4.355978718988183]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.7620399672740632, -0.8399996664423384, 0.7140739296518177, 2.464020368429715]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.030029709820944, -8.477642872199137, -7.21863703981801, -7.940861015698513]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.219698312368905, -9.919850270100483, -8.33725514908906, -10.32502896060555]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.530267862318333, -1.6440932088803086, -1.4195928256705868, -1.5984646414020562]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7186412959914437, -1.9247740851157757, -1.6358340933562259, -2.0291491063922]}}