{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:24.635337", "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-Jan-29_to_2012-Feb-01_3.0_30.5"}, "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": 2012010001514}, "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": "January 29 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 01 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": 77136.11582598559}, "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": ["Algeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "Sahara"]}, "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": 30.5}, "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": 3.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "3.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 1.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 5.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.97, 29.47], [0.75, 30.0], [0.97, 30.53], [1.5, 30.75], [1.75, 30.65], [2.0, 30.75], [2.53, 30.53], [2.75, 30.0], [2.53, 29.47], [2.0, 29.25], [1.75, 29.35], [1.5, 29.25], [0.97, 29.47]]]]}, "2012-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.97, 29.47], [0.75, 30.0], [0.97, 30.53], [1.5, 30.75], [1.75, 30.65], [1.82, 30.68], [1.85, 30.75], [1.75, 31.0], [1.97, 31.53], [2.32, 31.68], [2.35, 31.75], [2.25, 32.0], [2.47, 32.53], [3.0, 32.75], [3.53, 32.53], [3.68, 32.18], [3.75, 32.15], [4.0, 32.25], [4.25, 32.15], [4.5, 32.25], [4.75, 32.15], [5.0, 32.25], [5.53, 32.03], [5.68, 31.68], [6.03, 31.53], [6.25, 31.0], [6.03, 30.47], [5.68, 30.32], [5.53, 29.97], [5.18, 29.82], [5.15, 29.75], [5.25, 29.5], [5.03, 28.97], [4.5, 28.75], [4.25, 28.85], [4.0, 28.75], [3.75, 28.85], [3.5, 28.75], [2.97, 28.97], [2.82, 29.32], [2.75, 29.35], [2.5, 29.25], [2.25, 29.35], [2.0, 29.25], [1.75, 29.35], [1.5, 29.25], [0.97, 29.47]]]]}, "2012-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.97, 29.47], [0.75, 30.0], [0.97, 30.53], [1.5, 30.75], [1.75, 30.65], [1.82, 30.68], [1.85, 30.75], [1.75, 31.0], [1.97, 31.53], [2.32, 31.68], [2.35, 31.75], [2.25, 32.0], [2.47, 32.53], [3.0, 32.75], [3.53, 32.53], [3.68, 32.18], [3.75, 32.15], [4.0, 32.25], [4.25, 32.15], [4.5, 32.25], [4.75, 32.15], [5.0, 32.25], [5.53, 32.03], [5.68, 31.68], [6.03, 31.53], [6.25, 31.0], [6.03, 30.47], [5.68, 30.32], [5.53, 29.97], [5.18, 29.82], [5.15, 29.75], [5.25, 29.5], [5.03, 28.97], [4.5, 28.75], [4.25, 28.85], [4.0, 28.75], [3.75, 28.85], [3.5, 28.75], [2.97, 28.97], [2.82, 29.32], [2.75, 29.35], [2.5, 29.25], [2.25, 29.35], [2.0, 29.25], [1.75, 29.35], [1.5, 29.25], [0.97, 29.47]]]]}, "2012-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[1.85, 30.75], [1.75, 31.0], [1.97, 31.53], [2.32, 31.68], [2.35, 31.75], [2.25, 32.0], [2.47, 32.53], [3.0, 32.75], [3.53, 32.53], [3.68, 32.18], [3.75, 32.15], [4.0, 32.25], [4.25, 32.15], [4.5, 32.25], [4.75, 32.15], [5.0, 32.25], [5.53, 32.03], [5.68, 31.68], [6.03, 31.53], [6.25, 31.0], [6.03, 30.47], [5.68, 30.32], [5.53, 29.97], [5.18, 29.82], [5.15, 29.75], [5.25, 29.5], [5.03, 28.97], [4.5, 28.75], [4.25, 28.85], [4.0, 28.75], [3.75, 28.85], [3.5, 28.75], [2.97, 28.97], [2.82, 29.32], [2.75, 29.35], [2.5, 29.25], [1.97, 29.47], [1.75, 30.0], [1.85, 30.25], [1.75, 30.5], [1.85, 30.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.078861328320897}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.9582237787879384}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.210072425230578, 8.285161530391747, 7.112470797170204, 7.952777982042505]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.145213901301588, 6.68714888574749, 4.985672466955691, 6.727301865379161]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9719954417259657, -3.4174673633341675, -4.664293135085727, -3.8537193858119174]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1481540222758895, -3.8703838129640644, -6.078861328320897, -4.529561545599961]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.14508418883313, -1.3214457114579976, -1.7196356394956445, -1.373771666316435]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.1956223931364904, -1.4782135160046972, -2.107073718484134, -1.5817417743413371]}}