{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:01.827591", "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-Dec-22_to_2013-Jan-01_36.0_2.5"}, "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": 2012120000912}, "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 22 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 11}, "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": 108056.76155396248}, "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": ["Kenya", "Uganda"]}, "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": 2.5}, "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": 36.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "36.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 32.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 36.75}, "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": 4.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.47, 1.47], [33.25, 2.0], [33.47, 2.53], [34.0, 2.75], [34.25, 2.65], [34.5, 2.75], [35.03, 2.53], [35.25, 2.0], [35.03, 1.47], [34.5, 1.25], [34.25, 1.35], [34.0, 1.25], [33.47, 1.47]]]]}, "2012-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.97, 3.53], [33.32, 3.68], [33.47, 4.03], [34.0, 4.25], [34.5, 4.04], [34.82, 4.18], [34.97, 4.53], [35.32, 4.68], [35.47, 5.03], [36.0, 5.25], [36.53, 5.03], [36.68, 4.68], [37.03, 4.53], [37.25, 4.0], [37.15, 3.75], [37.25, 3.5], [37.15, 3.25], [37.25, 3.0], [37.03, 2.47], [36.68, 2.32], [36.65, 2.25], [36.75, 2.0], [36.53, 1.47], [36.0, 1.25], [35.5, 1.46], [35.0, 1.25], [34.75, 1.35], [34.5, 1.25], [34.25, 1.35], [34.0, 1.25], [33.47, 1.47], [33.32, 1.82], [32.97, 1.97], [32.75, 2.5], [32.85, 2.75], [32.75, 3.0], [32.97, 3.53]]]]}, "2012-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.97, 3.53], [33.32, 3.68], [33.47, 4.03], [34.0, 4.25], [34.5, 4.04], [34.82, 4.18], [34.97, 4.53], [35.32, 4.68], [35.47, 5.03], [36.0, 5.25], [36.53, 5.03], [36.68, 4.68], [37.03, 4.53], [37.25, 4.0], [37.15, 3.75], [37.25, 3.5], [37.15, 3.25], [37.25, 3.0], [37.03, 2.47], [36.68, 2.32], [36.65, 2.25], [36.75, 2.0], [36.53, 1.47], [36.0, 1.25], [35.5, 1.46], [35.0, 1.25], [34.75, 1.35], [34.5, 1.25], [34.25, 1.35], [34.0, 1.25], [33.47, 1.47], [33.32, 1.82], [32.97, 1.97], [32.75, 2.5], [32.85, 2.75], [32.75, 3.0], [32.97, 3.53]]]]}, "2012-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.97, 3.53], [33.32, 3.68], [33.47, 4.03], [34.0, 4.25], [34.5, 4.04], [34.82, 4.18], [34.97, 4.53], [35.32, 4.68], [35.47, 5.03], [36.0, 5.25], [36.53, 5.03], [36.68, 4.68], [37.03, 4.53], [37.25, 4.0], [37.15, 3.75], [37.25, 3.5], [37.15, 3.25], [37.25, 3.0], [37.03, 2.47], [36.68, 2.32], [36.65, 2.25], [36.75, 2.0], [36.53, 1.47], [36.0, 1.25], [35.5, 1.46], [35.0, 1.25], [34.75, 1.35], [34.5, 1.25], [33.97, 1.47], [33.8, 1.88], [33.5, 1.75], [32.97, 1.97], [32.75, 2.5], [32.85, 2.75], [32.75, 3.0], [32.97, 3.53]]]]}, "2012-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.47, 1.97], [35.25, 2.5], [35.47, 3.03], [36.0, 3.25], [36.53, 3.03], [36.75, 2.5], [36.53, 1.97], [36.0, 1.75], [35.47, 1.97]]], [[[33.5, 3.75], [34.03, 3.53], [34.25, 3.0], [34.15, 2.75], [34.25, 2.5], [34.03, 1.97], [33.5, 1.75], [32.97, 1.97], [32.75, 2.5], [32.85, 2.75], [32.75, 3.0], [32.97, 3.53], [33.5, 3.75]]]]}, "2012-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.47, 4.03], [36.0, 4.25], [36.53, 4.03], [36.68, 3.68], [37.03, 3.53], [37.25, 3.0], [37.03, 2.47], [36.68, 2.32], [36.53, 1.97], [36.0, 1.75], [35.47, 1.97], [35.25, 2.5], [35.46, 3.0], [35.25, 3.5], [35.47, 4.03]]]]}, "2012-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.85, 2.75], [33.75, 3.0], [33.97, 3.53], [34.5, 3.75], [34.8, 3.62], [34.97, 4.03], [35.5, 4.25], [35.75, 4.15], [36.0, 4.25], [36.25, 4.15], [36.5, 4.25], [37.03, 4.03], [37.25, 3.5], [37.15, 3.25], [37.25, 3.0], [37.04, 2.5], [37.25, 2.0], [37.03, 1.47], [36.68, 1.32], [36.53, 0.97], [36.0, 0.75], [35.5, 0.96], [35.0, 0.75], [34.47, 0.97], [34.32, 1.32], [33.97, 1.47], [33.75, 2.0], [33.85, 2.25], [33.75, 2.5], [33.85, 2.75]]]]}, "2012-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.47, 3.53], [33.0, 3.75], [33.25, 3.65], [33.5, 3.75], [33.75, 3.65], [34.0, 3.75], [34.25, 3.65], [34.5, 3.75], [34.8, 3.62], [34.97, 4.03], [35.5, 4.25], [35.75, 4.15], [36.0, 4.25], [36.25, 4.15], [36.5, 4.25], [37.03, 4.03], [37.25, 3.5], [37.15, 3.25], [37.25, 3.0], [37.04, 2.5], [37.25, 2.0], [37.03, 1.47], [36.68, 1.32], [36.53, 0.97], [36.0, 0.75], [35.5, 0.96], [35.0, 0.75], [34.75, 0.85], [34.5, 0.75], [34.25, 0.85], [34.0, 0.75], [33.5, 0.96], [33.0, 0.75], [32.47, 0.97], [32.25, 1.5], [32.46, 2.0], [32.25, 2.5], [32.35, 2.75], [32.25, 3.0], [32.47, 3.53]]]]}, "2012-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.47, 3.53], [33.0, 3.75], [33.25, 3.65], [33.5, 3.75], [33.75, 3.65], [34.0, 3.75], [34.25, 3.65], [34.5, 3.75], [34.8, 3.62], [34.97, 4.03], [35.5, 4.25], [36.0, 4.04], [36.5, 4.25], [37.03, 4.03], [37.25, 3.5], [37.15, 3.25], [37.25, 3.0], [37.04, 2.5], [37.25, 2.0], [37.03, 1.47], [36.68, 1.32], [36.53, 0.97], [36.0, 0.75], [35.5, 0.96], [35.0, 0.75], [34.75, 0.85], [34.5, 0.75], [34.25, 0.85], [34.0, 0.75], [33.5, 0.96], [33.0, 0.75], [32.47, 0.97], [32.25, 1.5], [32.46, 2.0], [32.25, 2.5], [32.35, 2.75], [32.25, 3.0], [32.47, 3.53]]]]}, "2012-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.47, 3.53], [33.0, 3.75], [33.25, 3.65], [33.5, 3.75], [33.75, 3.65], [34.0, 3.75], [34.25, 3.65], [34.5, 3.75], [34.8, 3.62], [34.97, 4.03], [35.5, 4.25], [36.03, 4.03], [36.18, 3.68], [36.25, 3.65], [36.5, 3.75], [37.03, 3.53], [37.25, 3.0], [37.04, 2.5], [37.25, 2.0], [37.03, 1.47], [36.5, 1.25], [36.25, 1.35], [36.0, 1.25], [35.75, 1.35], [35.5, 1.25], [35.25, 1.35], [35.18, 1.32], [35.03, 0.97], [34.5, 0.75], [34.25, 0.85], [34.0, 0.75], [33.5, 0.96], [33.0, 0.75], [32.47, 0.97], [32.25, 1.5], [32.46, 2.0], [32.25, 2.5], [32.35, 2.75], [32.25, 3.0], [32.47, 3.53]]]]}, "2013-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.75, 2.5], [34.97, 3.03], [35.5, 3.25], [36.03, 3.03], [36.18, 2.68], [36.53, 2.53], [36.75, 2.0], [36.53, 1.47], [36.0, 1.25], [35.47, 1.47], [35.32, 1.82], [34.97, 1.97], [34.75, 2.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.8814832152394274}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.2622392880131077}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.03062277395486, 24.784817174943612, 24.66229141907405, 25.248765070991283, 24.527220627812653, 28.061676539858638, 25.150828292354504, 24.08767685923243, 24.552114897481488, 24.868803718073252, 26.980011942327906]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.959161058872496, 19.698117808441793, 20.01819364275991, 20.140719398629415, 22.597521470425193, 27.483742434826183, 21.223053527159607, 20.488527687383225, 21.32126972599218, 21.476278079626468, 26.5942002901956]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0424723772183313, -2.477635173928727, -2.6157694150042015, -2.1070631437366174, -2.2275172534882586, -1.879065781873199, -2.200160765386009, -2.5713080261929173, -2.0294318634708013, -1.8652091998623757, -1.7378001713429967]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0787110299461347, -3.387827196529031, -3.8814832152394274, -3.135117543100023, -2.382451601070784, -2.1172720962863423, -3.016399642224144, -3.7649352251764867, -2.76375534638413, -2.872991989723573, -1.7466240206002794]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.535660397183375, -2.1228533324572307, -2.230009262523727, -1.7774526242543394, -1.6021364697334632, -1.6262670034523978, -1.8489408570940125, -2.096850085441203, -1.6066113336963808, -1.4729682931028518, -1.263958065515153]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7712270589935752, -2.8846163518367716, -2.8997842484639365, -2.2740932144464794, -1.783412120493048, -1.6720145979858838, -2.3374730759559883, -2.914727552555295, -1.9791103510748138, -2.048842591479906, -1.2727533231158412]}}