{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:24.234923", "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-27_to_2012-Feb-01_6.5_3.5"}, "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": 2012010001401}, "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 27 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": 6}, "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": 305640.19507510087}, "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": ["Cameroon", "Gabon"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "Equatorial.Atlantic-Ocean", "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": ["Gulf of Guinea", "South 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": 3.5}, "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": 6.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "6.5\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": 10.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -1.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 4.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.97, 4.03], [3.5, 4.25], [3.75, 4.15], [4.0, 4.25], [4.53, 4.03], [4.75, 3.5], [4.65, 3.25], [4.75, 3.0], [4.53, 2.47], [4.0, 2.25], [3.47, 2.47], [3.32, 2.82], [2.97, 2.97], [2.75, 3.5], [2.97, 4.03]]], [[[5.47, 4.53], [6.0, 4.75], [6.53, 4.53], [6.68, 4.18], [7.03, 4.03], [7.25, 3.5], [7.03, 2.97], [6.5, 2.75], [5.97, 2.97], [5.82, 3.32], [5.47, 3.47], [5.25, 4.0], [5.47, 4.53]]]]}, "2012-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.03, 3.03], [0.32, 3.18], [0.46, 3.5], [0.25, 4.0], [0.47, 4.53], [1.0, 4.75], [1.25, 4.65], [1.5, 4.75], [1.75, 4.65], [1.82, 4.68], [1.97, 5.03], [2.5, 5.25], [2.75, 5.15], [3.0, 5.25], [3.25, 5.15], [3.5, 5.25], [3.75, 5.15], [4.0, 5.25], [4.25, 5.15], [4.5, 5.25], [4.75, 5.15], [5.0, 5.25], [5.25, 5.15], [5.5, 5.25], [6.03, 5.03], [6.18, 4.68], [6.25, 4.65], [6.5, 4.75], [6.75, 4.65], [7.0, 4.75], [7.25, 4.65], [7.5, 4.75], [7.75, 4.65], [7.82, 4.68], [7.97, 5.03], [8.5, 5.25], [9.03, 5.03], [9.25, 4.5], [9.15, 4.25], [9.25, 4.0], [9.15, 3.75], [9.25, 3.5], [9.15, 3.25], [9.25, 3.0], [9.15, 2.75], [9.25, 2.5], [9.03, 1.97], [8.68, 1.82], [8.53, 1.47], [8.0, 1.25], [7.75, 1.35], [7.68, 1.32], [7.53, 0.97], [7.0, 0.75], [6.75, 0.85], [6.68, 0.82], [6.53, 0.47], [6.18, 0.32], [6.03, -0.03], [5.68, -0.18], [5.53, -0.53], [5.18, -0.68], [5.03, -1.03], [4.68, -1.18], [4.53, -1.53], [4.0, -1.75], [3.47, -1.53], [3.25, -1.0], [3.35, -0.75], [3.25, -0.5], [3.47, 0.03], [4.0, 0.25], [4.25, 0.15], [4.32, 0.18], [4.35, 0.25], [4.25, 0.5], [4.47, 1.03], [4.82, 1.18], [4.97, 1.53], [5.5, 1.75], [5.75, 1.65], [5.82, 1.68], [5.97, 2.03], [6.32, 2.18], [6.47, 2.53], [6.82, 2.68], [6.85, 2.75], [6.82, 2.82], [6.75, 2.85], [6.5, 2.75], [5.97, 2.97], [5.82, 3.32], [5.47, 3.47], [5.32, 3.82], [5.25, 3.85], [5.0, 3.75], [4.75, 3.85], [4.68, 3.82], [4.65, 3.75], [4.75, 3.5], [4.65, 3.25], [4.75, 3.0], [4.53, 2.47], [4.18, 2.32], [4.03, 1.97], [3.68, 1.82], [3.53, 1.47], [3.0, 1.25], [2.47, 1.47], [2.32, 1.82], [2.25, 1.85], [2.0, 1.75], [1.75, 1.85], [1.5, 1.75], [1.25, 1.85], [1.18, 1.82], [1.03, 1.47], [0.5, 1.25], [-0.03, 1.47], [-0.25, 2.0], [-0.15, 2.25], [-0.25, 2.5], [-0.03, 3.03]]]]}, "2012-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.03, 3.03], [0.32, 3.18], [0.46, 3.5], [0.25, 4.0], [0.47, 4.53], [1.0, 4.75], [1.25, 4.65], [1.5, 4.75], [1.75, 4.65], [1.82, 4.68], [1.97, 5.03], [2.5, 5.25], [2.75, 5.15], [3.0, 5.25], [3.25, 5.15], [3.5, 5.25], [3.75, 5.15], [4.0, 5.25], [4.25, 5.15], [4.5, 5.25], [4.75, 5.15], [5.0, 5.25], [5.25, 5.15], [5.5, 5.25], [6.03, 5.03], [6.18, 4.68], [6.25, 4.65], [6.5, 4.75], [6.75, 4.65], [7.0, 4.75], [7.25, 4.65], [7.5, 4.75], [7.75, 4.65], [7.82, 4.68], [7.97, 5.03], [8.5, 5.25], [9.03, 5.03], [9.25, 4.5], [9.15, 4.25], [9.25, 4.0], [9.15, 3.75], [9.25, 3.5], [9.15, 3.25], [9.18, 3.18], [9.25, 3.15], [9.5, 3.25], [10.03, 3.03], [10.25, 2.5], [10.15, 2.25], [10.25, 2.0], [10.15, 1.75], [10.25, 1.5], [10.15, 1.25], [10.25, 1.0], [10.15, 0.75], [10.25, 0.5], [10.03, -0.03], [9.68, -0.18], [9.65, -0.25], [9.75, -0.5], [9.53, -1.03], [9.0, -1.25], [8.75, -1.15], [8.5, -1.25], [7.97, -1.03], [7.75, -0.5], [7.85, -0.25], [7.75, 0.0], [7.85, 0.25], [7.82, 0.32], [7.75, 0.35], [7.5, 0.25], [6.97, 0.47], [6.82, 0.82], [6.75, 0.85], [6.68, 0.82], [6.53, 0.47], [6.18, 0.32], [6.03, -0.03], [5.68, -0.18], [5.53, -0.53], [5.18, -0.68], [5.03, -1.03], [4.68, -1.18], [4.53, -1.53], [4.0, -1.75], [3.47, -1.53], [3.25, -1.0], [3.35, -0.75], [3.25, -0.5], [3.47, 0.03], [4.0, 0.25], [4.25, 0.15], [4.32, 0.18], [4.35, 0.25], [4.25, 0.5], [4.47, 1.03], [4.82, 1.18], [4.97, 1.53], [5.5, 1.75], [5.75, 1.65], [5.82, 1.68], [5.97, 2.03], [6.32, 2.18], [6.47, 2.53], [6.82, 2.68], [6.85, 2.75], [6.82, 2.82], [6.75, 2.85], [6.5, 2.75], [5.97, 2.97], [5.82, 3.32], [5.47, 3.47], [5.32, 3.82], [5.25, 3.85], [5.0, 3.75], [4.75, 3.85], [4.68, 3.82], [4.65, 3.75], [4.75, 3.5], [4.65, 3.25], [4.75, 3.0], [4.53, 2.47], [4.18, 2.32], [4.03, 1.97], [3.68, 1.82], [3.53, 1.47], [3.0, 1.25], [2.47, 1.47], [2.32, 1.82], [2.25, 1.85], [2.0, 1.75], [1.75, 1.85], [1.5, 1.75], [1.25, 1.85], [1.18, 1.82], [1.03, 1.47], [0.5, 1.25], [-0.03, 1.47], [-0.25, 2.0], [-0.15, 2.25], [-0.25, 2.5], [-0.03, 3.03]]]]}, "2012-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-0.03, 3.03], [0.32, 3.18], [0.46, 3.5], [0.25, 4.0], [0.47, 4.53], [1.0, 4.75], [1.25, 4.65], [1.5, 4.75], [1.75, 4.65], [1.82, 4.68], [1.97, 5.03], [2.5, 5.25], [2.75, 5.15], [3.0, 5.25], [3.25, 5.15], [3.5, 5.25], [3.75, 5.15], [4.0, 5.25], [4.25, 5.15], [4.5, 5.25], [4.75, 5.15], [5.0, 5.25], [5.25, 5.15], [5.5, 5.25], [6.03, 5.03], [6.18, 4.68], [6.25, 4.65], [6.5, 4.75], [6.75, 4.65], [7.0, 4.75], [7.25, 4.65], [7.5, 4.75], [7.75, 4.65], [7.82, 4.68], [7.97, 5.03], [8.5, 5.25], [9.03, 5.03], [9.25, 4.5], [9.15, 4.25], [9.25, 4.0], [9.15, 3.75], [9.25, 3.5], [9.15, 3.25], [9.18, 3.18], [9.25, 3.15], [9.5, 3.25], [9.75, 3.15], [10.0, 3.25], [10.53, 3.03], [10.75, 2.5], [10.53, 1.97], [10.18, 1.82], [10.15, 1.75], [10.25, 1.5], [10.15, 1.25], [10.25, 1.0], [10.15, 0.75], [10.25, 0.5], [10.03, -0.03], [9.68, -0.18], [9.65, -0.25], [9.75, -0.5], [9.53, -1.03], [9.0, -1.25], [8.75, -1.15], [8.5, -1.25], [7.97, -1.03], [7.75, -0.5], [7.85, -0.25], [7.75, 0.0], [7.85, 0.25], [7.82, 0.32], [7.75, 0.35], [7.5, 0.25], [6.97, 0.47], [6.82, 0.82], [6.75, 0.85], [6.68, 0.82], [6.53, 0.47], [6.18, 0.32], [6.03, -0.03], [5.68, -0.18], [5.53, -0.53], [5.18, -0.68], [5.03, -1.03], [4.68, -1.18], [4.53, -1.53], [4.0, -1.75], [3.47, -1.53], [3.25, -1.0], [3.35, -0.75], [3.25, -0.5], [3.47, 0.03], [4.0, 0.25], [4.25, 0.15], [4.32, 0.18], [4.35, 0.25], [4.25, 0.5], [4.47, 1.03], [4.82, 1.18], [4.96, 1.5], [4.75, 2.0], [4.85, 2.25], [4.75, 2.5], [4.85, 2.75], [4.75, 3.0], [4.53, 2.47], [4.18, 2.32], [4.03, 1.97], [3.68, 1.82], [3.53, 1.47], [3.0, 1.25], [2.47, 1.47], [2.32, 1.82], [2.25, 1.85], [2.0, 1.75], [1.75, 1.85], [1.5, 1.75], [1.25, 1.85], [1.18, 1.82], [1.03, 1.47], [0.5, 1.25], [-0.03, 1.47], [-0.25, 2.0], [-0.15, 2.25], [-0.25, 2.5], [-0.03, 3.03]], [[4.97, 3.53], [5.32, 3.68], [5.35, 3.75], [5.32, 3.82], [5.25, 3.85], [5.0, 3.75], [4.75, 3.85], [4.68, 3.82], [4.65, 3.75], [4.75, 3.5], [4.65, 3.25], [4.75, 3.0], [4.97, 3.53]]]]}, "2012-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.85, 2.75], [4.75, 3.0], [4.97, 3.53], [5.32, 3.68], [5.35, 3.75], [5.25, 4.0], [5.47, 4.53], [6.0, 4.75], [6.25, 4.65], [6.5, 4.75], [7.03, 4.53], [7.25, 4.0], [7.15, 3.75], [7.25, 3.5], [7.15, 3.25], [7.25, 3.0], [7.15, 2.75], [7.25, 2.5], [7.07, 2.07], [7.32, 2.18], [7.47, 2.53], [8.0, 2.75], [8.25, 2.65], [8.32, 2.68], [8.47, 3.03], [9.0, 3.25], [9.25, 3.15], [9.5, 3.25], [9.75, 3.15], [10.0, 3.25], [10.53, 3.03], [10.75, 2.5], [10.53, 1.97], [10.18, 1.82], [10.15, 1.75], [10.25, 1.5], [10.15, 1.25], [10.25, 1.0], [10.15, 0.75], [10.25, 0.5], [10.03, -0.03], [9.68, -0.18], [9.65, -0.25], [9.75, -0.5], [9.53, -1.03], [9.0, -1.25], [8.75, -1.15], [8.5, -1.25], [7.97, -1.03], [7.75, -0.5], [7.85, -0.25], [7.75, 0.0], [7.85, 0.25], [7.82, 0.32], [7.75, 0.35], [7.5, 0.25], [6.97, 0.47], [6.75, 1.0], [6.85, 1.25], [6.75, 1.5], [6.93, 1.93], [6.68, 1.82], [6.53, 1.47], [6.0, 1.25], [5.75, 1.35], [5.5, 1.25], [4.97, 1.47], [4.75, 2.0], [4.85, 2.25], [4.75, 2.5], [4.85, 2.75]]]]}, "2012-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[4.85, 2.75], [4.75, 3.0], [4.97, 3.53], [5.32, 3.68], [5.47, 4.03], [5.82, 4.18], [5.97, 4.53], [6.5, 4.75], [7.03, 4.53], [7.25, 4.0], [7.15, 3.75], [7.25, 3.5], [7.15, 3.25], [7.25, 3.0], [7.15, 2.75], [7.25, 2.5], [7.07, 2.07], [7.32, 2.18], [7.47, 2.53], [8.0, 2.75], [8.25, 2.65], [8.32, 2.68], [8.47, 3.03], [9.0, 3.25], [9.25, 3.15], [9.5, 3.25], [9.75, 3.15], [10.0, 3.25], [10.53, 3.03], [10.75, 2.5], [10.53, 1.97], [10.18, 1.82], [10.04, 1.5], [10.25, 1.0], [10.03, 0.47], [9.5, 0.25], [9.0, 0.46], [8.5, 0.25], [8.25, 0.35], [8.0, 0.25], [7.75, 0.35], [7.5, 0.25], [6.97, 0.47], [6.75, 1.0], [6.85, 1.25], [6.75, 1.5], [6.93, 1.93], [6.68, 1.82], [6.53, 1.47], [6.0, 1.25], [5.75, 1.35], [5.5, 1.25], [4.97, 1.47], [4.75, 2.0], [4.85, 2.25], [4.75, 2.5], [4.85, 2.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.4878705172842501}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -0.8969436065808223}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.59127185609009, 26.343269871742393, 26.139383920125795, 26.111025366830745, 26.105305818587567, 26.09345770591358]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.46549372013294, 24.75300170026219, 24.295754113653572, 24.164635080203595, 25.13046963057093, 25.21699093636221]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.6400225219868503, -0.7921425683992136, -0.9220439747416695, -0.962388831509881, -0.8330915613982958, -0.9726211495174766]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.7289134749665322, -1.0812490317494508, -1.4576308660226118, -1.4878705172842501, -1.121399428016673, -1.2855702787639416]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.372531373305389, -1.5444422975870635, -1.7343076282375403, -1.8209053938485245, -1.509988640083828, -1.6997560913171297]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5349782422340632, -2.1057306937677467, -2.5068643830817807, -3.0624540527566326, -1.9603144680851736, -2.175295545156558]}}