{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:20.922733", "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": "2018-Mar-13_to_2018-Mar-16_279.5_25.5"}, "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": 2018030000501}, "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 13 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 16 2018"}, "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": 158090.88042331825}, "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": ["Caribbean", "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": ["Gulf of Mexico", "North Atlantic 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": 25.5}, "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": 279.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "279.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 275.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 280.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-03-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.53, 24.53], [-84.0, 24.75], [-83.75, 24.65], [-83.68, 24.68], [-83.53, 25.03], [-83.18, 25.18], [-83.04, 25.5], [-83.25, 26.0], [-83.15, 26.25], [-83.25, 26.5], [-83.04, 27.0], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0], [-83.03, 28.53], [-82.68, 28.68], [-82.53, 29.03], [-82.12, 29.2], [-82.25, 29.5], [-82.15, 29.75], [-82.25, 30.0], [-82.03, 30.53], [-81.5, 30.75], [-80.97, 30.53], [-80.82, 30.18], [-80.75, 30.15], [-80.5, 30.25], [-79.97, 30.03], [-79.75, 29.5], [-79.85, 29.25], [-79.75, 29.0], [-79.85, 28.75], [-79.75, 28.5], [-79.85, 28.25], [-79.82, 28.18], [-79.47, 28.03], [-79.25, 27.5], [-79.35, 27.25], [-79.25, 27.0], [-79.47, 26.47], [-79.87, 26.3], [-79.75, 26.0], [-79.85, 25.75], [-79.75, 25.5], [-79.85, 25.25], [-79.75, 25.0], [-79.85, 24.75], [-79.75, 24.5], [-79.97, 23.97], [-80.32, 23.82], [-80.47, 23.47], [-80.82, 23.32], [-80.97, 22.97], [-81.5, 22.75], [-81.75, 22.85], [-82.0, 22.75], [-82.53, 22.97], [-82.68, 23.32], [-82.75, 23.35], [-82.82, 23.32], [-82.97, 22.97], [-83.5, 22.75], [-83.75, 22.85], [-84.0, 22.75], [-84.53, 22.97], [-84.75, 23.5], [-84.65, 23.75], [-84.75, 24.0], [-84.53, 24.53]]]]}, "2018-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.53, 24.53], [-84.0, 24.75], [-83.75, 24.65], [-83.68, 24.68], [-83.53, 25.03], [-83.18, 25.18], [-83.04, 25.5], [-83.25, 26.0], [-83.15, 26.25], [-83.25, 26.5], [-83.04, 27.0], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0], [-83.03, 28.53], [-82.68, 28.68], [-82.53, 29.03], [-82.12, 29.2], [-82.25, 29.5], [-82.15, 29.75], [-82.25, 30.0], [-82.03, 30.53], [-81.5, 30.75], [-80.97, 30.53], [-80.82, 30.18], [-80.75, 30.15], [-80.5, 30.25], [-79.97, 30.03], [-79.75, 29.5], [-79.85, 29.25], [-79.75, 29.0], [-79.85, 28.75], [-79.75, 28.5], [-79.85, 28.25], [-79.82, 28.18], [-79.47, 28.03], [-79.25, 27.5], [-79.35, 27.25], [-79.25, 27.0], [-79.47, 26.47], [-79.87, 26.3], [-79.75, 26.0], [-79.85, 25.75], [-79.75, 25.5], [-79.85, 25.25], [-79.75, 25.0], [-79.85, 24.75], [-79.75, 24.5], [-79.97, 23.97], [-80.32, 23.82], [-80.47, 23.47], [-80.82, 23.32], [-80.97, 22.97], [-81.5, 22.75], [-81.75, 22.85], [-82.0, 22.75], [-82.53, 22.97], [-82.68, 23.32], [-82.75, 23.35], [-82.82, 23.32], [-82.97, 22.97], [-83.5, 22.75], [-83.75, 22.85], [-84.0, 22.75], [-84.53, 22.97], [-84.75, 23.5], [-84.65, 23.75], [-84.75, 24.0], [-84.53, 24.53]]]]}, "2018-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.53, 24.53], [-84.0, 24.75], [-83.75, 24.65], [-83.68, 24.68], [-83.53, 25.03], [-83.18, 25.18], [-83.04, 25.5], [-83.25, 26.0], [-83.15, 26.25], [-83.25, 26.5], [-83.04, 27.0], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0], [-83.03, 28.53], [-82.68, 28.68], [-82.53, 29.03], [-82.12, 29.2], [-82.25, 29.5], [-82.15, 29.75], [-82.25, 30.0], [-82.03, 30.53], [-81.5, 30.75], [-80.97, 30.53], [-80.82, 30.18], [-80.75, 30.15], [-80.5, 30.25], [-79.97, 30.03], [-79.75, 29.5], [-79.85, 29.25], [-79.75, 29.0], [-79.85, 28.75], [-79.75, 28.5], [-79.85, 28.25], [-79.82, 28.18], [-79.47, 28.03], [-79.25, 27.5], [-79.35, 27.25], [-79.25, 27.0], [-79.47, 26.47], [-79.87, 26.3], [-79.75, 26.0], [-79.85, 25.75], [-79.75, 25.5], [-79.85, 25.25], [-79.75, 25.0], [-79.85, 24.75], [-79.75, 24.5], [-79.97, 23.97], [-80.32, 23.82], [-80.47, 23.47], [-80.82, 23.32], [-80.97, 22.97], [-81.5, 22.75], [-81.75, 22.85], [-82.0, 22.75], [-82.53, 22.97], [-82.68, 23.32], [-82.75, 23.35], [-82.82, 23.32], [-82.97, 22.97], [-83.5, 22.75], [-83.75, 22.85], [-84.0, 22.75], [-84.53, 22.97], [-84.75, 23.5], [-84.65, 23.75], [-84.75, 24.0], [-84.53, 24.53]]]]}, "2018-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.03, 28.53], [-82.5, 28.75], [-82.25, 28.65], [-82.0, 28.75], [-81.75, 28.65], [-81.5, 28.75], [-80.97, 28.53], [-80.82, 28.18], [-80.47, 28.03], [-80.25, 27.5], [-80.47, 26.97], [-80.87, 26.8], [-80.75, 26.5], [-80.85, 26.25], [-80.8, 26.12], [-80.5, 26.25], [-79.97, 26.03], [-79.75, 25.5], [-79.97, 24.97], [-80.5, 24.75], [-81.03, 24.97], [-81.2, 25.38], [-81.5, 25.25], [-82.03, 25.47], [-82.18, 25.82], [-82.53, 25.97], [-82.75, 26.5], [-82.65, 26.75], [-82.68, 26.82], [-83.03, 26.97], [-83.25, 27.5], [-83.15, 27.75], [-83.25, 28.0], [-83.03, 28.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.768145567876843}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.647193758886987}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.456220810478158, 16.46908996257997, 16.57417299043459, 15.031907872776458]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.647396573675564, 11.420240040524106, 11.23861221775985, 13.217017475284024]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.5229813889478825, -4.622362887655436, -4.655363428290954, -5.295641163122217]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.519400806226372, -6.768145567876843, -6.614926009562339, -5.842655251982535]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5918008923944271, -1.678943305334217, -1.7650897529564036, -1.5851820599356676]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9157442900920703, -1.9308169247164384, -2.151918961954773, -1.720941447158965]}}