{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:17:07.312485", "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-Jul-17_to_2020-Jul-20_21.5_6.0"}, "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": 2020070000669}, "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": "July 17 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 20 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 194468.50322580244}, "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": ["Central African Republic", "Congo", "Congo, The Democratic Republic of the"]}, "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": []}, "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": 6.0}, "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": 21.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 17.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 24.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -0.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 6.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[17.53, 3.53], [17.75, 3.0], [17.646, 2.75], [17.677, 2.677], [17.75, 2.646], [18.0, 2.75], [18.25, 2.646], [18.5, 2.75], [18.802, 2.625], [18.854, 2.75], [18.75, 3.0], [18.854, 3.25], [18.75, 3.5], [18.97, 4.03], [19.5, 4.25], [19.927, 4.073], [19.75, 4.5], [19.97, 5.03], [20.5, 5.25], [20.75, 5.146], [20.823, 5.177], [20.854, 5.25], [20.75, 5.5], [20.854, 5.75], [20.75, 6.0], [20.97, 6.53], [21.5, 6.75], [21.75, 6.646], [22.0, 6.75], [22.53, 6.53], [22.75, 6.0], [22.646, 5.75], [22.677, 5.677], [22.75, 5.646], [22.751, 5.646], [23.0, 5.75], [23.53, 5.53], [23.75, 5.0], [23.646, 4.75], [23.75, 4.5], [23.53, 3.97], [23.177, 3.823], [23.146, 3.75], [23.25, 3.5], [23.073, 3.073], [23.5, 3.25], [23.75, 3.146], [24.0, 3.25], [24.53, 3.03], [24.75, 2.5], [24.646, 2.25], [24.75, 2.0], [24.53, 1.47], [24.0, 1.25], [23.75, 1.354], [23.677, 1.323], [23.646, 1.25], [23.75, 1.0], [23.53, 0.47], [23.177, 0.323], [23.03, -0.03], [22.677, -0.177], [22.646, -0.25], [22.75, -0.5], [22.53, -1.03], [22.0, -1.25], [21.47, -1.03], [21.323, -0.677], [20.97, -0.53], [20.75, 0.0], [20.854, 0.25], [20.75, 0.5], [20.854, 0.75], [20.75, 1.0], [20.854, 1.25], [20.823, 1.323], [20.75, 1.354], [20.677, 1.323], [20.53, 0.97], [20.0, 0.75], [19.5, 0.957], [19.0, 0.75], [18.5, 0.957], [18.0, 0.75], [17.47, 0.97], [17.323, 1.323], [17.25, 1.354], [17.0, 1.25], [16.47, 1.47], [16.25, 2.0], [16.354, 2.25], [16.25, 2.5], [16.354, 2.75], [16.25, 3.0], [16.47, 3.53], [17.0, 3.75], [17.53, 3.53]], [[20.177, 3.677], [20.25, 3.646], [20.323, 3.677], [20.354, 3.75], [20.323, 3.823], [20.073, 3.927], [20.177, 3.677]], [[22.677, 2.677], [22.75, 2.646], [22.823, 2.677], [22.927, 2.927], [22.72, 2.841], [22.625, 2.802], [22.677, 2.677]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-07-17T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[17.25, 1.3535533905932737], [17.0, 1.25], [16.46966991411009, 1.4696699141100893], [16.25, 2.0], [16.46966991411009, 2.5303300858899105], [17.0, 2.75], [17.25, 2.6464466094067265], [17.5, 2.75], [17.75, 2.6464466094067265], [18.0, 2.75], [18.25, 2.6464466094067265], [18.5, 2.75], [18.80177669529664, 2.625], [18.853553390593273, 2.75], [18.75, 3.0], [18.853553390593273, 3.25], [18.75, 3.5], [18.96966991411009, 4.0303300858899105], [19.5, 4.25], [20.03033008588991, 4.0303300858899105], [20.17677669529664, 3.676776695296637], [20.25, 3.6464466094067265], [20.32322330470336, 3.676776695296637], [20.353553390593273, 3.75], [20.25, 4.0], [20.46966991411009, 4.5303300858899105], [20.875, 4.698223304703363], [20.75, 5.0], [20.853553390593273, 5.25], [20.75, 5.5], [20.853553390593273, 5.75], [20.75, 6.0], [20.96966991411009, 6.5303300858899105], [21.5, 6.75], [21.75, 6.646446609406726], [22.0, 6.75], [22.53033008588991, 6.5303300858899105], [22.75, 6.0], [22.646446609406727, 5.75], [22.67677669529664, 5.6767766952966365], [23.03033008588991, 5.5303300858899105], [23.17677669529664, 5.1767766952966365], [23.53033008588991, 5.0303300858899105], [23.75, 4.5], [23.53033008588991, 3.9696699141100895], [23.0, 3.75], [22.46966991411009, 3.9696699141100895], [22.32322330470336, 4.3232233047033635], [22.25, 4.353553390593274], [22.0, 4.25], [21.75, 4.353553390593274], [21.625, 4.301776695296637], [21.67677669529664, 4.1767766952966365], [22.03033008588991, 4.0303300858899105], [22.25, 3.5], [22.146446609406727, 3.25], [22.17677669529664, 3.176776695296637], [22.53033008588991, 3.0303300858899105], [22.67677669529664, 2.676776695296637], [22.75, 2.6464466094067265], [22.82322330470336, 2.676776695296637], [22.96966991411009, 3.0303300858899105], [23.5, 3.25], [23.75, 3.1464466094067265], [24.0, 3.25], [24.53033008588991, 3.0303300858899105], [24.75, 2.5], [24.646446609406727, 2.25], [24.75, 2.0], [24.53033008588991, 1.4696699141100895], [24.0, 1.25], [23.75, 1.3535533905932737], [23.67677669529664, 1.3232233047033632], [23.646446609406727, 1.25], [23.75, 1.0], [23.53033008588991, 0.4696699141100894], [23.17677669529664, 0.32322330470336313], [23.03033008588991, -0.030330085889910596], [22.67677669529664, -0.17677669529663687], [22.646446609406727, -0.24999999999999997], [22.75, -0.5], [22.53033008588991, -1.0303300858899105], [22.0, -1.25], [21.46966991411009, -1.0303300858899107], [21.32322330470336, -0.6767766952966369], [20.96966991411009, -0.5303300858899107], [20.75, 0.0], [20.853553390593273, 0.24999999999999997], [20.75, 0.5], [20.853553390593273, 0.75], [20.75, 1.0], [20.853553390593273, 1.25], [20.82322330470336, 1.323223304703363], [20.75, 1.3535533905932737], [20.67677669529664, 1.3232233047033632], [20.53033008588991, 0.9696699141100894], [20.0, 0.75], [19.5, 0.9571067811865472], [19.0, 0.75], [18.5, 0.9571067811865472], [18.0, 0.75], [17.46966991411009, 0.9696699141100893], [17.32322330470336, 1.323223304703363], [17.25, 1.3535533905932737]]]}, "2020-07-18T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[16.353553390593273, 2.25], [16.25, 2.5], [16.353553390593273, 2.75], [16.25, 3.0], [16.46966991411009, 3.5303300858899105], [17.0, 3.75], [17.53033008588991, 3.5303300858899105], [17.75, 3.0], [17.646446609406727, 2.75], [17.67677669529664, 2.676776695296637], [17.75, 2.6464466094067265], [18.0, 2.75], [18.25, 2.6464466094067265], [18.5, 2.75], [18.80177669529664, 2.625], [18.853553390593273, 2.75], [18.75, 3.0], [18.853553390593273, 3.25], [18.75, 3.5], [18.96966991411009, 4.0303300858899105], [19.5, 4.25], [19.926776695296635, 4.0732233047033635], [19.75, 4.5], [19.96966991411009, 5.0303300858899105], [20.5, 5.25], [20.75, 5.146446609406726], [20.82322330470336, 5.1767766952966365], [20.853553390593273, 5.25], [20.75, 5.5], [20.853553390593273, 5.75], [20.75, 6.0], [20.96966991411009, 6.5303300858899105], [21.5, 6.75], [21.75, 6.646446609406726], [22.0, 6.75], [22.53033008588991, 6.5303300858899105], [22.75, 6.0], [22.646446609406727, 5.75], [22.67677669529664, 5.6767766952966365], [22.75, 5.646446609406726], [23.0, 5.75], [23.53033008588991, 5.5303300858899105], [23.75, 5.0], [23.646446609406727, 4.75], [23.75, 4.5], [23.53033008588991, 3.9696699141100895], [23.17677669529664, 3.823223304703363], [23.146446609406727, 3.75], [23.25, 3.5], [23.073223304703365, 3.0732233047033635], [23.5, 3.25], [23.75, 3.1464466094067265], [24.0, 3.25], [24.53033008588991, 3.0303300858899105], [24.75, 2.5], [24.646446609406727, 2.25], [24.75, 2.0], [24.53033008588991, 1.4696699141100895], [24.0, 1.25], [23.75, 1.3535533905932737], [23.67677669529664, 1.3232233047033632], [23.646446609406727, 1.25], [23.75, 1.0], [23.53033008588991, 0.4696699141100894], [23.17677669529664, 0.32322330470336313], [23.03033008588991, -0.030330085889910596], [22.67677669529664, -0.17677669529663687], [22.646446609406727, -0.24999999999999997], [22.75, -0.5], [22.53033008588991, -1.0303300858899105], [22.0, -1.25], [21.46966991411009, -1.0303300858899107], [21.32322330470336, -0.6767766952966369], [20.96966991411009, -0.5303300858899107], [20.75, 0.0], [20.853553390593273, 0.24999999999999997], [20.75, 0.5], [20.853553390593273, 0.75], [20.75, 1.0], [20.853553390593273, 1.25], [20.82322330470336, 1.323223304703363], [20.75, 1.3535533905932737], [20.67677669529664, 1.3232233047033632], [20.53033008588991, 0.9696699141100894], [20.0, 0.75], [19.5, 0.9571067811865472], [19.0, 0.75], [18.5, 0.9571067811865472], [18.0, 0.75], [17.46966991411009, 0.9696699141100893], [17.32322330470336, 1.323223304703363], [17.25, 1.3535533905932737], [17.0, 1.25], [16.46966991411009, 1.4696699141100893], [16.25, 2.0], [16.353553390593273, 2.25]], [[22.67677669529664, 2.676776695296637], [22.75, 2.6464466094067265], [22.82322330470336, 2.676776695296637], [22.926776695296635, 2.9267766952966365], [22.625, 2.801776695296637], [22.67677669529664, 2.676776695296637]], [[20.17677669529664, 3.676776695296637], [20.25, 3.6464466094067265], [20.32322330470336, 3.676776695296637], [20.353553390593273, 3.75], [20.32322330470336, 3.823223304703363], [20.073223304703365, 3.9267766952966365], [20.17677669529664, 3.676776695296637]]]}, "2020-07-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[16.353553390593273, 2.25], [16.25, 2.5], [16.353553390593273, 2.75], [16.25, 3.0], [16.46966991411009, 3.5303300858899105], [17.0, 3.75], [17.53033008588991, 3.5303300858899105], [17.75, 3.0], [17.646446609406727, 2.75], [17.67677669529664, 2.676776695296637], [17.75, 2.6464466094067265], [18.0, 2.75], [18.25, 2.6464466094067265], [18.5, 2.75], [18.80177669529664, 2.625], [18.853553390593273, 2.75], [18.75, 3.0], [18.853553390593273, 3.25], [18.75, 3.5], [18.96966991411009, 4.0303300858899105], [19.5, 4.25], [19.926776695296635, 4.0732233047033635], [19.75, 4.5], [19.96966991411009, 5.0303300858899105], [20.5, 5.25], [20.75, 5.146446609406726], [20.82322330470336, 5.1767766952966365], [20.853553390593273, 5.25], [20.75, 5.5], [20.853553390593273, 5.75], [20.75, 6.0], [20.96966991411009, 6.5303300858899105], [21.5, 6.75], [21.75, 6.646446609406726], [22.0, 6.75], [22.53033008588991, 6.5303300858899105], [22.75, 6.0], [22.646446609406727, 5.75], [22.67677669529664, 5.6767766952966365], [22.75, 5.646446609406726], [23.0, 5.75], [23.53033008588991, 5.5303300858899105], [23.75, 5.0], [23.646446609406727, 4.75], [23.75, 4.5], [23.53033008588991, 3.9696699141100895], [23.17677669529664, 3.823223304703363], [23.146446609406727, 3.75], [23.25, 3.5], [23.073223304703365, 3.0732233047033635], [23.5, 3.25], [23.75, 3.1464466094067265], [24.0, 3.25], [24.53033008588991, 3.0303300858899105], [24.75, 2.5], [24.646446609406727, 2.25], [24.75, 2.0], [24.53033008588991, 1.4696699141100895], [24.0, 1.25], [23.75, 1.3535533905932737], [23.67677669529664, 1.3232233047033632], [23.646446609406727, 1.25], [23.75, 1.0], [23.53033008588991, 0.4696699141100894], [23.17677669529664, 0.32322330470336313], [23.03033008588991, -0.030330085889910596], [22.67677669529664, -0.17677669529663687], [22.646446609406727, -0.24999999999999997], [22.75, -0.5], [22.53033008588991, -1.0303300858899105], [22.0, -1.25], [21.46966991411009, -1.0303300858899107], [21.32322330470336, -0.6767766952966369], [20.96966991411009, -0.5303300858899107], [20.75, 0.0], [20.853553390593273, 0.24999999999999997], [20.75, 0.5], [20.853553390593273, 0.75], [20.75, 1.0], [20.853553390593273, 1.25], [20.82322330470336, 1.323223304703363], [20.75, 1.3535533905932737], [20.67677669529664, 1.3232233047033632], [20.53033008588991, 0.9696699141100894], [20.0, 0.75], [19.5, 0.9571067811865472], [19.0, 0.75], [18.5, 0.9571067811865472], [18.0, 0.75], [17.46966991411009, 0.9696699141100893], [17.32322330470336, 1.323223304703363], [17.25, 1.3535533905932737], [17.0, 1.25], [16.46966991411009, 1.4696699141100893], [16.25, 2.0], [16.353553390593273, 2.25]], [[22.67677669529664, 2.676776695296637], [22.75, 2.6464466094067265], [22.82322330470336, 2.676776695296637], [22.926776695296635, 2.9267766952966365], [22.625, 2.801776695296637], [22.67677669529664, 2.676776695296637]], [[20.17677669529664, 3.676776695296637], [20.25, 3.6464466094067265], [20.32322330470336, 3.676776695296637], [20.353553390593273, 3.75], [20.32322330470336, 3.823223304703363], [20.073223304703365, 3.9267766952966365], [20.17677669529664, 3.676776695296637]]]}, "2020-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.25, 3.0], [16.46966991411009, 3.5303300858899105], [17.0, 3.75], [17.53033008588991, 3.5303300858899105], [17.75, 3.0], [17.646446609406727, 2.75], [17.75, 2.5], [17.53033008588991, 1.9696699141100895], [17.0, 1.75], [16.46966991411009, 1.9696699141100893], [16.25, 2.5], [16.353553390593273, 2.75], [16.25, 3.0]]], [[[20.5, 3.75], [19.96966991411009, 3.9696699141100895], [19.75, 4.5], [19.96966991411009, 5.0303300858899105], [20.5, 5.25], [20.75, 5.146446609406726], [20.82322330470336, 5.1767766952966365], [20.853553390593273, 5.25], [20.75, 5.5], [20.853553390593273, 5.75], [20.75, 6.0], [20.96966991411009, 6.5303300858899105], [21.5, 6.75], [21.75, 6.646446609406726], [22.0, 6.75], [22.53033008588991, 6.5303300858899105], [22.75, 6.0], [22.646446609406727, 5.75], [22.67677669529664, 5.6767766952966365], [22.75, 5.646446609406726], [23.0, 5.75], [23.53033008588991, 5.5303300858899105], [23.75, 5.0], [23.646446609406727, 4.75], [23.75, 4.5], [23.53033008588991, 3.9696699141100895], [23.17677669529664, 3.823223304703363], [23.146446609406727, 3.75], [23.25, 3.5], [23.03033008588991, 2.9696699141100895], [22.5, 2.75], [21.96966991411009, 2.9696699141100895], [21.75, 3.5], [21.853553390593273, 3.75], [21.80177669529664, 3.875], [21.5, 3.75], [21.25, 3.8535533905932735], [21.0, 3.75], [20.75, 3.8535533905932735], [20.5, 3.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.244308049511801}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.570755494242462}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.95052088035601, 22.69007861241721, 22.65024913574848, 22.871048149717808]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.188129341974957, 21.95764255519515, 21.628930728831165, 22.156119634320305]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4455668692902712, -1.641659347183529, -1.680139482630131, -1.2725715188198023]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0198499337832914, -2.199343088794251, -2.244308049511801, -1.5904130025457448]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5193959204219514, -1.728338079099697, -1.8467533528354243, -1.479234267482192]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.066120685592167, -2.216776751746862, -2.622183549874252, -1.7663167155432775]}}