{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:21.989033", "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-Jul-03_to_2015-Jul-06_269.5_33.5"}, "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": 2015070000258}, "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": "July 03 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 06 2015"}, "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": 58845.26562249799}, "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", "E.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": 33.5}, "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": 269.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "269.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 268.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 272.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-07-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-90.53, 34.47], [-90.75, 35.0], [-90.53, 35.53], [-90.0, 35.75], [-89.75, 35.65], [-89.5, 35.75], [-89.25, 35.65], [-89.0, 35.75], [-88.75, 35.65], [-88.5, 35.75], [-88.25, 35.65], [-88.0, 35.75], [-87.75, 35.65], [-87.5, 35.75], [-86.97, 35.53], [-86.75, 35.0], [-86.97, 34.47], [-87.32, 34.32], [-87.47, 33.97], [-88.0, 33.75], [-88.25, 33.85], [-88.5, 33.75], [-88.75, 33.85], [-89.0, 33.75], [-89.53, 33.97], [-89.68, 34.32], [-89.75, 34.35], [-90.0, 34.25], [-90.53, 34.47]]]]}, "2015-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.18, 34.68], [-91.03, 35.03], [-90.68, 35.18], [-90.53, 35.53], [-90.0, 35.75], [-89.75, 35.65], [-89.5, 35.75], [-89.25, 35.65], [-89.0, 35.75], [-88.75, 35.65], [-88.5, 35.75], [-88.25, 35.65], [-88.0, 35.75], [-87.75, 35.65], [-87.5, 35.75], [-86.97, 35.53], [-86.75, 35.0], [-86.97, 34.47], [-87.32, 34.32], [-87.47, 33.97], [-88.0, 33.75], [-88.25, 33.85], [-88.5, 33.75], [-88.75, 33.85], [-88.82, 33.82], [-88.85, 33.75], [-88.75, 33.5], [-88.85, 33.25], [-88.75, 33.0], [-88.97, 32.47], [-89.5, 32.25], [-89.75, 32.35], [-90.0, 32.25], [-90.25, 32.35], [-90.5, 32.25], [-91.03, 32.47], [-91.18, 32.82], [-91.25, 32.85], [-91.5, 32.75], [-92.03, 32.97], [-92.25, 33.5], [-92.03, 34.03], [-91.68, 34.18], [-91.53, 34.53], [-91.18, 34.68]]]]}, "2015-07-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.18, 34.68], [-91.03, 35.03], [-90.68, 35.18], [-90.53, 35.53], [-90.0, 35.75], [-89.75, 35.65], [-89.5, 35.75], [-89.25, 35.65], [-89.0, 35.75], [-88.75, 35.65], [-88.5, 35.75], [-88.25, 35.65], [-88.0, 35.75], [-87.75, 35.65], [-87.5, 35.75], [-86.97, 35.53], [-86.75, 35.0], [-86.97, 34.47], [-87.32, 34.32], [-87.47, 33.97], [-88.0, 33.75], [-88.25, 33.85], [-88.5, 33.75], [-88.75, 33.85], [-88.82, 33.82], [-88.85, 33.75], [-88.75, 33.5], [-88.85, 33.25], [-88.75, 33.0], [-88.97, 32.47], [-89.5, 32.25], [-89.75, 32.35], [-90.0, 32.25], [-90.25, 32.35], [-90.5, 32.25], [-91.03, 32.47], [-91.18, 32.82], [-91.25, 32.85], [-91.5, 32.75], [-92.03, 32.97], [-92.25, 33.5], [-92.03, 34.03], [-91.68, 34.18], [-91.53, 34.53], [-91.18, 34.68]]]]}, "2015-07-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-91.18, 34.68], [-91.03, 35.03], [-90.5, 35.25], [-90.25, 35.15], [-90.0, 35.25], [-89.47, 35.03], [-89.32, 34.68], [-88.97, 34.53], [-88.75, 34.0], [-88.85, 33.75], [-88.75, 33.5], [-88.85, 33.25], [-88.75, 33.0], [-88.97, 32.47], [-89.5, 32.25], [-89.75, 32.35], [-90.0, 32.25], [-90.25, 32.35], [-90.5, 32.25], [-91.03, 32.47], [-91.18, 32.82], [-91.25, 32.85], [-91.5, 32.75], [-92.03, 32.97], [-92.25, 33.5], [-92.03, 34.03], [-91.68, 34.18], [-91.53, 34.53], [-91.18, 34.68]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.119475954814163}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.4268040373937785}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.425196650826535, 23.37514481238719, 23.510779770498345, 24.645261688543087]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.92408485218374, 22.569805690288888, 23.228014262388058, 24.175588266929765]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1497138060033887, -3.662843446945969, -3.632520720505276, -2.879191319625826]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5965341276035474, -4.107454207990031, -4.119475954814163, -3.2258424218741197]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5709816261372527, -1.9747742037664933, -2.089127110793352, -1.7698401069778522]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7339951058461092, -2.2486254531322922, -2.518372885471312, -2.0826013600695723]}}