{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:32:21.922113", "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": "2022-Sep-26_to_2022-Oct-01_358.0_7.5"}, "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": 2022090000876}, "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": "September 26 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 01 2022"}, "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": 168424.44053815206}, "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": 7.5}, "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": -2.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "358.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": -2.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 4.25}, "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": 9.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.25, 8.0], [-3.03, 8.53], [-2.5, 8.75], [-2.25, 8.65], [-2.18, 8.68], [-2.03, 9.03], [-1.68, 9.18], [-1.53, 9.53], [-1.18, 9.68], [-1.03, 10.03], [-0.5, 10.25], [-0.25, 10.15], [0.0, 10.25], [0.25, 10.15], [0.5, 10.25], [1.03, 10.03], [1.25, 9.5], [1.15, 9.25], [1.18, 9.18], [1.25, 9.15], [1.5, 9.25], [2.03, 9.03], [2.18, 8.68], [2.25, 8.65], [2.5, 8.75], [2.75, 8.65], [3.0, 8.75], [3.25, 8.65], [3.5, 8.75], [4.03, 8.53], [4.18, 8.18], [4.53, 8.03], [4.75, 7.5], [4.65, 7.25], [4.75, 7.0], [4.53, 6.47], [4.0, 6.25], [3.75, 6.35], [3.5, 6.25], [3.25, 6.35], [3.0, 6.25], [2.75, 6.35], [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], [0.5, 5.96], [0.0, 5.75], [-0.53, 5.97], [-0.68, 6.32], [-0.75, 6.35], [-1.0, 6.25], [-1.53, 6.47], [-1.68, 6.82], [-1.75, 6.85], [-2.0, 6.75], [-2.53, 6.97], [-2.68, 7.32], [-3.03, 7.47], [-3.25, 8.0]]]]}, "2022-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.25, 8.0], [-3.03, 8.53], [-2.5, 8.75], [-2.25, 8.65], [-2.18, 8.68], [-2.03, 9.03], [-1.68, 9.18], [-1.53, 9.53], [-1.18, 9.68], [-1.03, 10.03], [-0.5, 10.25], [-0.25, 10.15], [0.0, 10.25], [0.25, 10.15], [0.5, 10.25], [1.03, 10.03], [1.25, 9.5], [1.15, 9.25], [1.18, 9.18], [1.25, 9.15], [1.5, 9.25], [2.03, 9.03], [2.18, 8.68], [2.25, 8.65], [2.5, 8.75], [2.75, 8.65], [3.0, 8.75], [3.25, 8.65], [3.5, 8.75], [4.03, 8.53], [4.18, 8.18], [4.53, 8.03], [4.75, 7.5], [4.65, 7.25], [4.75, 7.0], [4.53, 6.47], [4.0, 6.25], [3.75, 6.35], [3.5, 6.25], [3.25, 6.35], [3.0, 6.25], [2.75, 6.35], [2.68, 6.32], [2.53, 5.97], [2.0, 5.75], [1.75, 5.85], [1.5, 5.75], [1.25, 5.85], [1.0, 5.75], [0.5, 5.96], [0.0, 5.75], [-0.53, 5.97], [-0.68, 6.32], [-0.75, 6.35], [-1.0, 6.25], [-1.53, 6.47], [-1.68, 6.82], [-1.75, 6.85], [-2.0, 6.75], [-2.53, 6.97], [-2.68, 7.32], [-3.03, 7.47], [-3.25, 8.0]]]]}, "2022-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-3.25, 8.0], [-3.03, 8.53], [-2.5, 8.75], [-2.25, 8.65], [-2.18, 8.68], [-2.03, 9.03], [-1.68, 9.18], [-1.53, 9.53], [-1.18, 9.68], [-1.03, 10.03], [-0.5, 10.25], [-0.25, 10.15], [0.0, 10.25], [0.25, 10.15], [0.5, 10.25], [1.03, 10.03], [1.25, 9.5], [1.15, 9.25], [1.18, 9.18], [1.25, 9.15], [1.5, 9.25], [2.03, 9.03], [2.18, 8.68], [2.25, 8.65], [2.5, 8.75], [2.75, 8.65], [3.0, 8.75], [3.25, 8.65], [3.5, 8.75], [4.03, 8.53], [4.18, 8.18], [4.53, 8.03], [4.75, 7.5], [4.65, 7.25], [4.75, 7.0], [4.53, 6.47], [4.0, 6.25], [3.75, 6.35], [3.5, 6.25], [3.25, 6.35], [3.0, 6.25], [2.75, 6.35], [2.68, 6.32], [2.53, 5.97], [2.0, 5.75], [1.75, 5.85], [1.5, 5.75], [1.25, 5.85], [1.0, 5.75], [0.5, 5.96], [0.0, 5.75], [-0.53, 5.97], [-0.68, 6.32], [-0.75, 6.35], [-1.0, 6.25], [-1.53, 6.47], [-1.68, 6.82], [-1.75, 6.85], [-2.0, 6.75], [-2.53, 6.97], [-2.68, 7.32], [-3.03, 7.47], [-3.25, 8.0]]]]}, "2022-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[0.25, 8.15], [0.5, 8.25], [1.03, 8.03], [1.18, 7.68], [1.53, 7.53], [1.68, 7.18], [1.75, 7.15], [2.0, 7.25], [2.53, 7.03], [2.75, 6.5], [2.53, 5.97], [2.0, 5.75], [1.75, 5.85], [1.5, 5.75], [1.25, 5.85], [1.0, 5.75], [0.5, 5.96], [0.0, 5.75], [-0.53, 5.97], [-0.68, 6.32], [-1.03, 6.47], [-1.25, 7.0], [-1.03, 7.53], [-0.68, 7.68], [-0.53, 8.03], [0.0, 8.25], [0.25, 8.15]]], [[[-2.53, 6.97], [-2.75, 7.5], [-2.53, 8.03], [-2.0, 8.25], [-1.47, 8.03], [-1.25, 7.5], [-1.47, 6.97], [-2.0, 6.75], [-2.53, 6.97]]]]}, "2022-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.0, 8.25], [-1.47, 8.03], [-1.25, 7.5], [-1.47, 6.97], [-2.0, 6.75], [-2.53, 6.97], [-2.75, 7.5], [-2.53, 8.03], [-2.0, 8.25]]]]}, "2022-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.0, 8.25], [-1.47, 8.03], [-1.25, 7.5], [-1.47, 6.97], [-2.0, 6.75], [-2.53, 6.97], [-2.75, 7.5], [-2.53, 8.03], [-2.0, 8.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.9620170515677273}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6364402146498889}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.763896289468903, 24.302913334972118, 24.214687174676726, 24.783801432213977, 24.018970826085763, 23.907695294434973]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.081604335658483, 23.123244000107547, 22.931850774939505, 23.88285627559293, 24.018970826085763, 23.907695294434973]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.996732648582763, -1.4763474618159762, -1.585594858404758, -1.0092352559236806, -1.0970294798074747, -1.2209100624527878]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.9620170515677273, -2.3474538239674985, -2.392718146246011, -1.2238565099771677, -1.0970294798074747, -1.2209100624527878]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.500031843158703, -1.8976638769437644, -2.074194345841797, -1.4732210963659034, -1.3843000863920818, -1.5494607567059882]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.40322427247375, -2.6438617065723355, -2.928083540540252, -1.6767751824061436, -1.3843000863920818, -1.5494607567059882]}}