{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:09.057952", "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-Dec-26_to_2012-Jan-01_357.0_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": 2011120001350}, "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": "December 26 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 64392.44547832653}, "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": ["Morocco"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": 357.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "357.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 352.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 357.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.03, 32.97], [-4.25, 33.5], [-4.03, 34.03], [-3.5, 34.25], [-3.25, 34.15], [-3.0, 34.25], [-2.47, 34.03], [-2.32, 33.68], [-1.97, 33.53], [-1.75, 33.0], [-1.85, 32.75], [-1.75, 32.5], [-1.97, 31.97], [-2.5, 31.75], [-3.03, 31.97], [-3.25, 32.5], [-3.15, 32.75], [-3.18, 32.82], [-3.25, 32.85], [-3.5, 32.75], [-4.03, 32.97]]]]}, "2011-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.53, 35.03], [-4.0, 35.25], [-3.47, 35.03], [-3.25, 34.5], [-3.35, 34.25], [-3.32, 34.18], [-3.25, 34.15], [-3.0, 34.25], [-2.47, 34.03], [-2.32, 33.68], [-1.97, 33.53], [-1.75, 33.0], [-1.85, 32.75], [-1.75, 32.5], [-1.97, 31.97], [-2.5, 31.75], [-3.0, 31.96], [-3.5, 31.75], [-4.03, 31.97], [-4.25, 32.5], [-4.15, 32.75], [-4.25, 33.0], [-4.15, 33.25], [-4.18, 33.32], [-4.53, 33.47], [-4.75, 34.0], [-4.65, 34.25], [-4.75, 34.5], [-4.53, 35.03]]]]}, "2011-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.53, 34.53], [-5.0, 34.75], [-4.75, 34.65], [-4.68, 34.68], [-4.53, 35.03], [-4.0, 35.25], [-3.47, 35.03], [-3.25, 34.5], [-3.35, 34.25], [-3.32, 34.18], [-3.25, 34.15], [-3.0, 34.25], [-2.47, 34.03], [-2.32, 33.68], [-1.97, 33.53], [-1.75, 33.0], [-1.85, 32.75], [-1.75, 32.5], [-1.97, 31.97], [-2.5, 31.75], [-3.0, 31.96], [-3.5, 31.75], [-4.03, 31.97], [-4.2, 32.38], [-4.5, 32.25], [-5.03, 32.47], [-5.18, 32.82], [-5.53, 32.97], [-5.75, 33.5], [-5.65, 33.75], [-5.75, 34.0], [-5.53, 34.53]]]]}, "2011-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.68, 34.68], [-6.53, 35.03], [-6.0, 35.25], [-5.75, 35.15], [-5.5, 35.25], [-4.97, 35.03], [-4.82, 34.68], [-4.75, 34.65], [-4.68, 34.68], [-4.53, 35.03], [-4.0, 35.25], [-3.47, 35.03], [-3.25, 34.5], [-3.35, 34.25], [-3.3, 34.12], [-3.0, 34.25], [-2.47, 34.03], [-2.25, 33.5], [-2.35, 33.25], [-2.25, 33.0], [-2.47, 32.47], [-2.82, 32.32], [-2.97, 31.97], [-3.5, 31.75], [-4.03, 31.97], [-4.2, 32.38], [-4.5, 32.25], [-5.03, 32.47], [-5.18, 32.82], [-5.25, 32.85], [-5.32, 32.82], [-5.47, 32.47], [-6.0, 32.25], [-6.53, 32.47], [-6.68, 32.82], [-6.75, 32.85], [-7.0, 32.75], [-7.53, 32.97], [-7.75, 33.5], [-7.53, 34.03], [-7.18, 34.18], [-7.03, 34.53], [-6.68, 34.68]]]]}, "2011-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 32.97], [-8.25, 33.5], [-8.03, 34.03], [-7.5, 34.25], [-7.25, 34.15], [-7.18, 34.18], [-7.03, 34.53], [-6.68, 34.68], [-6.53, 35.03], [-6.0, 35.25], [-5.75, 35.15], [-5.5, 35.25], [-4.97, 35.03], [-4.82, 34.68], [-4.75, 34.65], [-4.5, 34.75], [-4.25, 34.65], [-4.0, 34.75], [-3.47, 34.53], [-3.3, 34.12], [-3.0, 34.25], [-2.47, 34.03], [-2.25, 33.5], [-2.47, 32.97], [-2.82, 32.82], [-2.97, 32.47], [-3.5, 32.25], [-4.0, 32.46], [-4.5, 32.25], [-5.03, 32.47], [-5.18, 32.82], [-5.25, 32.85], [-5.32, 32.82], [-5.47, 32.47], [-6.0, 32.25], [-6.53, 32.47], [-6.68, 32.82], [-6.75, 32.85], [-7.0, 32.75], [-7.25, 32.85], [-7.5, 32.75], [-8.03, 32.97]]]]}, "2011-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 32.97], [-8.25, 33.5], [-8.03, 34.03], [-7.5, 34.25], [-7.25, 34.15], [-7.18, 34.18], [-7.03, 34.53], [-6.68, 34.68], [-6.53, 35.03], [-6.0, 35.25], [-5.75, 35.15], [-5.5, 35.25], [-4.97, 35.03], [-4.8, 34.62], [-4.5, 34.75], [-3.97, 34.53], [-3.75, 34.0], [-3.97, 33.47], [-4.5, 33.25], [-4.8, 33.38], [-4.97, 32.97], [-5.32, 32.82], [-5.47, 32.47], [-6.0, 32.25], [-6.53, 32.47], [-6.68, 32.82], [-6.75, 32.85], [-7.0, 32.75], [-7.25, 32.85], [-7.5, 32.75], [-8.03, 32.97]]]]}, "2012-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 32.97], [-8.25, 33.5], [-8.03, 34.03], [-7.5, 34.25], [-7.25, 34.15], [-7.0, 34.25], [-6.7, 34.12], [-6.65, 34.25], [-6.75, 34.5], [-6.53, 35.03], [-6.0, 35.25], [-5.75, 35.15], [-5.5, 35.25], [-4.97, 35.03], [-4.75, 34.5], [-4.97, 33.97], [-5.32, 33.82], [-5.47, 33.47], [-6.0, 33.25], [-6.3, 33.38], [-6.47, 32.97], [-7.0, 32.75], [-7.25, 32.85], [-7.5, 32.75], [-8.03, 32.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.261198368546957}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.3636406324256867}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.246247015645054, 3.5794436946596306, 4.296068348504093, 5.856272547337653, 6.685466858300515, 8.24895238569718, 9.6716290525207]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.0968316864884287, 1.7017649635840826, 2.485253756921111, 2.1338671185417866, 2.5433439438307346, 5.700687878216229, 8.99635267800943]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.726494661980354, -4.29675488857452, -3.5828317104045317, -3.4325201336110625, -3.0734739644499403, -2.9345183289249377, -2.6232496911043426]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.173904886907906, -5.261198368546957, -4.873918711907606, -4.277604552612786, -3.6827210195326643, -3.3976839238794696, -2.829683075989692]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.392146224085422, -1.6096898069359402, -1.4279139682604007, -1.5237944298129837, -1.3693961202773934, -1.3638430992560515, -1.220603776883344]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5329041045320508, -1.8343869069839456, -1.7567390997474401, -1.8246434624346977, -1.5522425169401306, -1.5122787778958393, -1.2536262541554455]}}