{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:46.976549", "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-Feb-22_to_2011-Feb-28_1.5_7.0"}, "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": 2011020001075}, "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": "February 22 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 28 2011"}, "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": 79686.01202413492}, "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": ["Benin", "Ghana", "Nigeria", "Togo"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "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": 7.0}, "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": 1.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "1.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -0.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 4.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 6.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.25, 7.0], [0.47, 7.53], [1.0, 7.75], [1.25, 7.65], [1.5, 7.75], [1.75, 7.65], [1.82, 7.68], [1.97, 8.03], [2.5, 8.25], [3.03, 8.03], [3.25, 7.5], [3.15, 7.25], [3.25, 7.0], [3.03, 6.47], [2.5, 6.25], [2.25, 6.35], [2.18, 6.32], [2.03, 5.97], [1.5, 5.75], [0.97, 5.97], [0.82, 6.32], [0.47, 6.47], [0.25, 7.0]]]]}, "2011-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.53, 8.03], [0.0, 8.25], [0.25, 8.15], [0.5, 8.25], [0.75, 8.15], [1.0, 8.25], [1.25, 8.15], [1.5, 8.25], [2.0, 8.04], [2.5, 8.25], [2.75, 8.15], [2.88, 8.2], [2.75, 8.5], [2.97, 9.03], [3.5, 9.25], [4.03, 9.03], [4.2, 8.63], [4.5, 8.75], [5.03, 8.53], [5.25, 8.0], [5.03, 7.47], [4.5, 7.25], [4.2, 7.38], [4.03, 6.97], [3.5, 6.75], [3.25, 6.85], [3.18, 6.82], [3.03, 6.47], [2.5, 6.25], [2.25, 6.35], [2.18, 6.32], [2.03, 5.97], [1.5, 5.75], [1.25, 5.85], [1.0, 5.75], [0.75, 5.85], [0.5, 5.75], [-0.03, 5.97], [-0.18, 6.32], [-0.53, 6.47], [-0.75, 7.0], [-0.65, 7.25], [-0.75, 7.5], [-0.53, 8.03]]]]}, "2011-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.53, 8.03], [0.0, 8.25], [0.25, 8.15], [0.5, 8.25], [0.75, 8.15], [1.0, 8.25], [1.25, 8.15], [1.5, 8.25], [2.0, 8.04], [2.5, 8.25], [2.75, 8.15], [2.88, 8.2], [2.75, 8.5], [2.97, 9.03], [3.5, 9.25], [4.03, 9.03], [4.2, 8.63], [4.5, 8.75], [5.03, 8.53], [5.25, 8.0], [5.03, 7.47], [4.5, 7.25], [4.2, 7.38], [4.03, 6.97], [3.5, 6.75], [3.25, 6.85], [3.18, 6.82], [3.03, 6.47], [2.5, 6.25], [2.25, 6.35], [2.18, 6.32], [2.03, 5.97], [1.5, 5.75], [1.25, 5.85], [1.0, 5.75], [0.75, 5.85], [0.5, 5.75], [-0.03, 5.97], [-0.18, 6.32], [-0.53, 6.47], [-0.75, 7.0], [-0.65, 7.25], [-0.75, 7.5], [-0.53, 8.03]]]]}, "2011-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.53, 8.03], [0.0, 8.25], [0.25, 8.15], [0.5, 8.25], [0.75, 8.15], [1.0, 8.25], [1.25, 8.15], [1.5, 8.25], [2.0, 8.04], [2.5, 8.25], [2.75, 8.15], [2.82, 8.18], [2.85, 8.25], [2.75, 8.5], [2.97, 9.03], [3.5, 9.25], [3.75, 9.15], [4.0, 9.25], [4.25, 9.15], [4.5, 9.25], [5.03, 9.03], [5.25, 8.5], [5.15, 8.25], [5.25, 8.0], [5.15, 7.75], [5.25, 7.5], [5.03, 6.97], [4.68, 6.82], [4.53, 6.47], [4.0, 6.25], [3.75, 6.35], [3.5, 6.25], [2.97, 6.47], [2.82, 6.82], [2.75, 6.85], [2.5, 6.75], [2.2, 6.88], [2.15, 6.75], [2.25, 6.5], [2.03, 5.97], [1.5, 5.75], [1.25, 5.85], [1.0, 5.75], [0.75, 5.85], [0.5, 5.75], [-0.03, 5.97], [-0.18, 6.32], [-0.53, 6.47], [-0.75, 7.0], [-0.65, 7.25], [-0.75, 7.5], [-0.53, 8.03]]]]}, "2011-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.53, 8.03], [0.0, 8.25], [0.25, 8.15], [0.5, 8.25], [0.75, 8.15], [1.0, 8.25], [1.25, 8.15], [1.5, 8.25], [2.0, 8.04], [2.5, 8.25], [2.75, 8.15], [2.82, 8.18], [2.85, 8.25], [2.75, 8.5], [2.97, 9.03], [3.32, 9.18], [3.47, 9.53], [4.0, 9.75], [4.53, 9.53], [4.68, 9.18], [5.03, 9.03], [5.25, 8.5], [5.15, 8.25], [5.25, 8.0], [5.15, 7.75], [5.25, 7.5], [5.03, 6.97], [4.68, 6.82], [4.53, 6.47], [4.0, 6.25], [3.75, 6.35], [3.5, 6.25], [2.97, 6.47], [2.82, 6.82], [2.75, 6.85], [2.5, 6.75], [2.2, 6.88], [2.03, 6.47], [1.68, 6.32], [1.53, 5.97], [1.0, 5.75], [0.47, 5.97], [0.3, 6.38], [0.0, 6.25], [-0.53, 6.47], [-0.75, 7.0], [-0.65, 7.25], [-0.75, 7.5], [-0.53, 8.03]]]]}, "2011-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.53, 6.97], [-0.75, 7.5], [-0.53, 8.03], [0.0, 8.25], [0.5, 8.04], [1.0, 8.25], [1.25, 8.15], [1.5, 8.25], [2.0, 8.04], [2.5, 8.25], [2.75, 8.15], [2.82, 8.18], [2.85, 8.25], [2.75, 8.5], [2.97, 9.03], [3.32, 9.18], [3.47, 9.53], [4.0, 9.75], [4.53, 9.53], [4.68, 9.18], [5.03, 9.03], [5.25, 8.5], [5.15, 8.25], [5.25, 8.0], [5.15, 7.75], [5.25, 7.5], [5.03, 6.97], [4.68, 6.82], [4.53, 6.47], [4.0, 6.25], [3.75, 6.35], [3.5, 6.25], [2.97, 6.47], [2.82, 6.82], [2.75, 6.85], [2.5, 6.75], [2.2, 6.88], [2.03, 6.47], [1.68, 6.32], [1.53, 5.97], [1.0, 5.75], [0.47, 5.97], [0.25, 6.5], [0.35, 6.75], [0.3, 6.88], [0.0, 6.75], [-0.53, 6.97]]]]}, "2011-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.0, 9.75], [4.53, 9.53], [4.75, 9.0], [4.53, 8.47], [4.0, 8.25], [3.47, 8.47], [3.25, 9.0], [3.47, 9.53], [4.0, 9.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.75697906583531}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9970234826116366}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.904249651957855, 25.925304533014184, 27.51909521398909, 27.347705330662734, 27.042393673611286, 26.39749237408688, 27.931907538360065]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.233521473940982, 24.705805665077776, 26.004977054621236, 25.826259546019628, 26.215163960472353, 25.216743580664513, 27.931907538360065]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2751614772864361, -3.1243513141592576, -1.513430756579993, -1.522532109666288, -1.826096721043633, -2.408305981213986, -1.4293597125017072]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.4782035249746173, -3.75697906583531, -2.1704296770086557, -2.184525746678048, -2.564687755923387, -3.57221433505282, -1.4293597125017072]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3650551969242164, -3.2727458457017997, -1.551412730562082, -1.4949970652593536, -1.7208559245695594, -2.28093101639882, -1.2634114610616225]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.41416778967286, -4.01905971568899, -1.9402936214300914, -2.017458119096799, -2.2676581659441566, -3.135764117131887, -1.2634114610616225]}}