{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:09.003140", "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-03_42.0_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": 2011120001336}, "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 03 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 70964.09009259842}, "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": ["Ethiopia", "Kenya", "Somalia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa", "S.Eastern-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": 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": 42.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "42.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 40.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 43.75}, "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": 6.25}, "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": [[[[41.47, 4.03], [42.0, 4.25], [42.53, 4.03], [42.75, 3.5], [42.65, 3.25], [42.75, 3.0], [42.53, 2.47], [42.0, 2.25], [41.47, 2.47], [41.25, 3.0], [41.35, 3.25], [41.25, 3.5], [41.47, 4.03]]]]}, "2011-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.47, 4.03], [42.0, 4.25], [42.53, 4.03], [42.75, 3.5], [42.65, 3.25], [42.75, 3.0], [42.53, 2.47], [42.0, 2.25], [41.47, 2.47], [41.25, 3.0], [41.35, 3.25], [41.25, 3.5], [41.47, 4.03]]]]}, "2011-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.47, 4.03], [42.0, 4.25], [42.53, 4.03], [42.75, 3.5], [42.65, 3.25], [42.75, 3.0], [42.53, 2.47], [42.0, 2.25], [41.47, 2.47], [41.25, 3.0], [41.35, 3.25], [41.25, 3.5], [41.47, 4.03]]]]}, "2011-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.75, 3.5], [40.97, 4.03], [41.32, 4.18], [41.46, 4.5], [41.25, 5.0], [41.35, 5.25], [41.25, 5.5], [41.35, 5.75], [41.25, 6.0], [41.47, 6.53], [42.0, 6.75], [42.53, 6.53], [42.75, 6.0], [42.65, 5.75], [42.68, 5.68], [43.03, 5.53], [43.25, 5.0], [43.03, 4.47], [42.63, 4.3], [42.75, 4.0], [42.65, 3.75], [42.75, 3.5], [42.65, 3.25], [42.75, 3.0], [42.54, 2.5], [42.75, 2.0], [42.53, 1.47], [42.0, 1.25], [41.75, 1.35], [41.5, 1.25], [40.97, 1.47], [40.75, 2.0], [40.97, 2.53], [41.38, 2.7], [41.32, 2.82], [40.97, 2.97], [40.75, 3.5]]]]}, "2011-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.75, 3.5], [40.97, 4.03], [41.32, 4.18], [41.35, 4.25], [41.25, 4.5], [41.35, 4.75], [41.25, 5.0], [41.35, 5.25], [41.25, 5.5], [41.35, 5.75], [41.25, 6.0], [41.47, 6.53], [42.0, 6.75], [42.53, 6.53], [42.75, 6.0], [42.65, 5.75], [42.68, 5.68], [43.03, 5.53], [43.25, 5.0], [43.03, 4.47], [42.68, 4.32], [42.65, 4.25], [42.75, 4.0], [42.65, 3.75], [42.7, 3.62], [42.82, 3.68], [42.97, 4.03], [43.5, 4.25], [44.03, 4.03], [44.25, 3.5], [44.03, 2.97], [43.68, 2.82], [43.53, 2.47], [43.0, 2.25], [42.57, 2.43], [42.75, 2.0], [42.53, 1.47], [42.0, 1.25], [41.75, 1.35], [41.5, 1.25], [40.97, 1.47], [40.75, 2.0], [40.97, 2.53], [41.38, 2.7], [41.32, 2.82], [40.97, 2.97], [40.75, 3.5]]]]}, "2011-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.25, 4.5], [41.35, 4.75], [41.25, 5.0], [41.35, 5.25], [41.25, 5.5], [41.35, 5.75], [41.25, 6.0], [41.47, 6.53], [42.0, 6.75], [42.53, 6.53], [42.75, 6.0], [42.65, 5.75], [42.68, 5.68], [43.03, 5.53], [43.25, 5.0], [43.03, 4.47], [42.68, 4.32], [42.65, 4.25], [42.68, 4.18], [43.0, 4.04], [43.5, 4.25], [44.03, 4.03], [44.25, 3.5], [44.15, 3.25], [44.25, 3.0], [44.03, 2.47], [43.5, 2.25], [43.25, 2.35], [43.18, 2.32], [43.15, 2.25], [43.25, 2.0], [43.03, 1.47], [42.5, 1.25], [42.25, 1.35], [42.0, 1.25], [41.75, 1.35], [41.5, 1.25], [40.97, 1.47], [40.75, 2.0], [40.97, 2.53], [41.5, 2.75], [40.97, 2.97], [40.75, 3.5], [40.97, 4.03], [41.32, 4.18], [41.35, 4.25], [41.25, 4.5]], [[41.75, 2.65], [41.82, 2.68], [41.88, 2.8], [41.75, 2.85], [41.5, 2.75], [41.75, 2.65]]]]}, "2012-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.82, 2.32], [40.47, 2.47], [40.25, 3.0], [40.47, 3.53], [40.82, 3.68], [40.97, 4.03], [41.32, 4.18], [41.35, 4.25], [41.25, 4.5], [41.47, 5.03], [42.0, 5.25], [42.53, 5.03], [42.75, 4.5], [42.65, 4.25], [42.68, 4.18], [43.0, 4.04], [43.5, 4.25], [44.03, 4.03], [44.25, 3.5], [44.15, 3.25], [44.25, 3.0], [44.03, 2.47], [43.5, 2.25], [43.25, 2.35], [43.18, 2.32], [43.15, 2.25], [43.25, 2.0], [43.03, 1.47], [42.68, 1.32], [42.53, 0.97], [42.0, 0.75], [41.75, 0.85], [41.5, 0.75], [41.25, 0.85], [41.0, 0.75], [40.47, 0.97], [40.25, 1.5], [40.47, 2.03], [40.82, 2.18], [40.85, 2.25], [40.82, 2.32]]]]}, "2012-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.82, 2.32], [40.47, 2.47], [40.25, 3.0], [40.47, 3.53], [40.82, 3.68], [40.97, 4.03], [41.32, 4.18], [41.47, 4.53], [42.0, 4.75], [42.53, 4.53], [42.68, 4.18], [43.0, 4.04], [43.5, 4.25], [44.03, 4.03], [44.25, 3.5], [44.15, 3.25], [44.25, 3.0], [44.03, 2.47], [43.5, 2.25], [43.25, 2.35], [43.18, 2.32], [43.15, 2.25], [43.25, 2.0], [43.03, 1.47], [42.68, 1.32], [42.53, 0.97], [42.0, 0.75], [41.75, 0.85], [41.5, 0.75], [41.25, 0.85], [41.0, 0.75], [40.47, 0.97], [40.25, 1.5], [40.47, 2.03], [40.82, 2.18], [40.85, 2.25], [40.82, 2.32]]]]}, "2012-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.82, 2.32], [40.47, 2.47], [40.25, 3.0], [40.47, 3.53], [40.82, 3.68], [40.97, 4.03], [41.5, 4.25], [41.75, 4.15], [42.0, 4.25], [42.53, 4.03], [42.75, 3.5], [42.63, 3.2], [43.03, 3.03], [43.25, 2.5], [43.15, 2.25], [43.25, 2.0], [43.03, 1.47], [42.68, 1.32], [42.53, 0.97], [42.0, 0.75], [41.75, 0.85], [41.5, 0.75], [41.25, 0.85], [41.0, 0.75], [40.47, 0.97], [40.25, 1.5], [40.47, 2.03], [40.82, 2.18], [40.85, 2.25], [40.82, 2.32]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.544286838696621}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6796030931704113}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.81529097139378, 26.727253453956678, 27.0648983276908, 26.70660610556297, 26.767555156096307, 27.159498752295974, 27.39489148093776, 27.34929444128801, 27.866945222262586]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.669302072750497, 26.505372536931475, 26.742799692747326, 23.436656044222957, 23.31964283618271, 23.22914151750865, 25.746608917592255, 25.392574175033644, 26.21066614850423]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6166209440903572, -1.7284919567136683, -1.406038493863349, -1.7632120235045647, -1.7264767131166143, -1.5796467467305106, -1.7855758258991443, -1.7949432275478563, -1.418009716216261]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7833729605501958, -1.816094452264224, -1.4264494057593993, -2.1533746376177874, -2.405233327592782, -2.1402757544551605, -2.482579625723588, -2.544286838696621, -1.7417280155029857]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.518594490450357, -1.6278957417546298, -1.3237173914314844, -1.6137707654227955, -1.5544893804949294, -1.4384694052641311, -1.6520817386499074, -1.6803271928980685, -1.2822589637866473]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6486467372226348, -1.682909619671303, -1.3691236823005832, -1.960063257715398, -2.0315737083902916, -1.7928271966297478, -2.234893922907857, -2.2202843400358074, -1.4974644497825018]}}