{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:10:57.366880", "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": "2020-Jan-10_to_2020-Jan-14_38.5_16.0"}, "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": 2020010000300}, "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 10 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 14 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 77513.20478489302}, "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": ["Eritrea", "Ethiopia", "Sudan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "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": ["Red Sea"]}, "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": 16.0}, "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": 38.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "38.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 38.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 41.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[37.47, 16.03], [37.823, 16.177], [37.854, 16.25], [37.823, 16.323], [37.47, 16.47], [37.25, 17.0], [37.457, 17.5], [37.25, 18.0], [37.47, 18.53], [38.0, 18.75], [38.53, 18.53], [38.677, 18.177], [39.03, 18.03], [39.25, 17.5], [39.146, 17.25], [39.177, 17.177], [39.53, 17.03], [39.75, 16.5], [39.646, 16.25], [39.677, 16.177], [40.03, 16.03], [40.177, 15.677], [40.53, 15.53], [40.75, 15.0], [40.646, 14.75], [40.677, 14.677], [40.75, 14.646], [41.0, 14.75], [41.53, 14.53], [41.677, 14.177], [42.03, 14.03], [42.25, 13.5], [42.03, 12.97], [41.5, 12.75], [40.97, 12.97], [40.823, 13.323], [40.75, 13.354], [40.677, 13.323], [40.53, 12.97], [40.0, 12.75], [39.47, 12.97], [39.25, 13.5], [39.354, 13.75], [39.25, 14.0], [39.03, 13.47], [38.5, 13.25], [38.25, 13.354], [38.0, 13.25], [37.47, 13.47], [37.25, 14.0], [37.354, 14.25], [37.25, 14.5], [37.354, 14.75], [37.25, 15.0], [37.354, 15.25], [37.25, 15.5], [37.47, 16.03]], [[39.354, 14.25], [39.323, 14.323], [39.25, 14.354], [39.177, 14.323], [39.146, 14.25], [39.25, 14.0], [39.354, 14.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.53033008588991, 14.969669914110089], [38.0, 14.75], [37.46966991411009, 14.969669914110089], [37.25, 15.5], [37.46966991411009, 16.03033008588991], [38.0, 16.25], [38.53033008588991, 16.03033008588991], [38.75, 15.5], [38.53033008588991, 14.969669914110089]]], [[[38.53033008588991, 17.46966991411009], [38.0, 17.25], [37.46966991411009, 17.46966991411009], [37.25, 18.0], [37.46966991411009, 18.53033008588991], [38.0, 18.75], [38.53033008588991, 18.53033008588991], [38.75, 18.0], [38.53033008588991, 17.46966991411009]]]]}, "2020-01-11T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[37.35355339059328, 14.25], [37.25, 14.5], [37.35355339059328, 14.75], [37.25, 15.0], [37.35355339059328, 15.25], [37.25, 15.5], [37.46966991411009, 16.03033008588991], [37.82322330470336, 16.17677669529664], [37.85355339059328, 16.25], [37.82322330470336, 16.32322330470336], [37.46966991411009, 16.46966991411009], [37.25, 17.0], [37.45710678118655, 17.5], [37.25, 18.0], [37.46966991411009, 18.53033008588991], [38.0, 18.75], [38.53033008588991, 18.53033008588991], [38.67677669529664, 18.17677669529664], [39.03033008588991, 18.03033008588991], [39.25, 17.5], [39.14644660940672, 17.25], [39.17677669529664, 17.17677669529664], [39.53033008588991, 17.03033008588991], [39.75, 16.5], [39.64644660940672, 16.25], [39.67677669529664, 16.17677669529664], [40.03033008588991, 16.03033008588991], [40.17677669529664, 15.676776695296637], [40.53033008588991, 15.530330085889911], [40.75, 15.0], [40.64644660940672, 14.75], [40.67677669529664, 14.676776695296637], [40.75, 14.646446609406725], [41.0, 14.75], [41.53033008588991, 14.530330085889911], [41.67677669529664, 14.176776695296637], [42.03033008588991, 14.030330085889911], [42.25, 13.5], [42.03033008588991, 12.969669914110089], [41.5, 12.75], [40.96966991411009, 12.969669914110089], [40.82322330470336, 13.323223304703363], [40.75, 13.353553390593275], [40.67677669529664, 13.323223304703363], [40.53033008588991, 12.969669914110089], [40.0, 12.75], [39.46966991411009, 12.969669914110089], [39.25, 13.5], [39.35355339059328, 13.75], [39.25, 14.0], [39.03033008588991, 13.469669914110089], [38.5, 13.25], [38.25, 13.353553390593275], [38.0, 13.25], [37.46966991411009, 13.469669914110089], [37.25, 14.0], [37.35355339059328, 14.25]], [[39.25, 14.0], [39.35355339059328, 14.25], [39.32322330470336, 14.323223304703363], [39.25, 14.353553390593275], [39.17677669529664, 14.323223304703363], [39.14644660940672, 14.25], [39.25, 14.0]]]}, "2020-01-12T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[37.35355339059328, 14.25], [37.25, 14.5], [37.35355339059328, 14.75], [37.25, 15.0], [37.35355339059328, 15.25], [37.25, 15.5], [37.46966991411009, 16.03033008588991], [37.82322330470336, 16.17677669529664], [37.85355339059328, 16.25], [37.82322330470336, 16.32322330470336], [37.46966991411009, 16.46966991411009], [37.25, 17.0], [37.45710678118655, 17.5], [37.25, 18.0], [37.46966991411009, 18.53033008588991], [38.0, 18.75], [38.53033008588991, 18.53033008588991], [38.67677669529664, 18.17677669529664], [39.03033008588991, 18.03033008588991], [39.25, 17.5], [39.14644660940672, 17.25], [39.17677669529664, 17.17677669529664], [39.53033008588991, 17.03033008588991], [39.75, 16.5], [39.64644660940672, 16.25], [39.67677669529664, 16.17677669529664], [40.03033008588991, 16.03033008588991], [40.17677669529664, 15.676776695296637], [40.53033008588991, 15.530330085889911], [40.75, 15.0], [40.64644660940672, 14.75], [40.67677669529664, 14.676776695296637], [40.75, 14.646446609406725], [41.0, 14.75], [41.53033008588991, 14.530330085889911], [41.67677669529664, 14.176776695296637], [42.03033008588991, 14.030330085889911], [42.25, 13.5], [42.03033008588991, 12.969669914110089], [41.5, 12.75], [40.96966991411009, 12.969669914110089], [40.82322330470336, 13.323223304703363], [40.75, 13.353553390593275], [40.67677669529664, 13.323223304703363], [40.53033008588991, 12.969669914110089], [40.0, 12.75], [39.46966991411009, 12.969669914110089], [39.25, 13.5], [39.35355339059328, 13.75], [39.25, 14.0], [39.03033008588991, 13.469669914110089], [38.5, 13.25], [38.25, 13.353553390593275], [38.0, 13.25], [37.46966991411009, 13.469669914110089], [37.25, 14.0], [37.35355339059328, 14.25]], [[39.25, 14.0], [39.35355339059328, 14.25], [39.32322330470336, 14.323223304703363], [39.25, 14.353553390593275], [39.17677669529664, 14.323223304703363], [39.14644660940672, 14.25], [39.25, 14.0]]]}, "2020-01-13T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[37.35355339059328, 14.25], [37.25, 14.5], [37.35355339059328, 14.75], [37.25, 15.0], [37.46966991411009, 15.530330085889911], [37.82322330470336, 15.676776695296637], [37.85355339059328, 15.75], [37.75, 16.0], [37.85355339059328, 16.25], [37.82322330470336, 16.32322330470336], [37.46966991411009, 16.46966991411009], [37.25, 17.0], [37.45710678118655, 17.5], [37.25, 18.0], [37.46966991411009, 18.53033008588991], [38.0, 18.75], [38.53033008588991, 18.53033008588991], [38.67677669529664, 18.17677669529664], [39.03033008588991, 18.03033008588991], [39.25, 17.5], [39.14644660940672, 17.25], [39.17677669529664, 17.17677669529664], [39.53033008588991, 17.03033008588991], [39.75, 16.5], [39.64644660940672, 16.25], [39.67677669529664, 16.17677669529664], [40.03033008588991, 16.03033008588991], [40.17677669529664, 15.676776695296637], [40.53033008588991, 15.530330085889911], [40.75, 15.0], [40.64644660940672, 14.75], [40.67677669529664, 14.676776695296637], [40.75, 14.646446609406725], [41.0, 14.75], [41.53033008588991, 14.530330085889911], [41.67677669529664, 14.176776695296637], [42.03033008588991, 14.030330085889911], [42.25, 13.5], [42.03033008588991, 12.969669914110089], [41.5, 12.75], [40.96966991411009, 12.969669914110089], [40.82322330470336, 13.323223304703363], [40.75, 13.353553390593275], [40.67677669529664, 13.323223304703363], [40.53033008588991, 12.969669914110089], [40.0, 12.75], [39.46966991411009, 12.969669914110089], [39.25, 13.5], [39.35355339059328, 13.75], [39.25, 14.0], [39.03033008588991, 13.469669914110089], [38.5, 13.25], [38.25, 13.353553390593275], [38.0, 13.25], [37.46966991411009, 13.469669914110089], [37.25, 14.0], [37.35355339059328, 14.25]], [[39.25, 14.0], [39.35355339059328, 14.25], [39.32322330470336, 14.323223304703363], [39.25, 14.353553390593275], [39.17677669529664, 14.323223304703363], [39.14644660940672, 14.25], [39.25, 14.0]]]}, "2020-01-14T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[37.75, 16.0], [37.96966991411009, 16.53033008588991], [38.5, 16.75], [39.03033008588991, 16.53033008588991], [39.25, 16.0], [39.03033008588991, 15.469669914110089], [38.5, 15.25], [37.96966991411009, 15.469669914110089], [37.75, 16.0]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.637491719628258}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.22401904702244}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.537588848379755, 18.40998000247754, 17.93273094870466, 18.536778121402335, 15.262289560803822]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.13587390540954, 14.060112862656354, 12.969454956295351, 14.115837902791156, 15.262289560803822]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.95781183888829, -3.145742515775269, -3.61563496310598, -2.950443874536004, -2.448988769706034]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.0930703527243395, -4.020825944688454, -4.637491719628258, -3.736918820267647, -2.448988769706034]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.549327991989475, -1.8613122146852266, -2.0829969362448373, -1.6579801341750382, -1.3569935895897876]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5717607476527768, -2.12711481632745, -2.516202297154676, -2.3710706982970304, -1.3569935895897876]}}