{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:26:00.851269", "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": "2021-Jul-03_to_2021-Jul-12_32.5_-5.5"}, "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": 2021070000257}, "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 03 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 12 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 10}, "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": 83086.65118684935}, "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": ["Tanzania, United Republic of"]}, "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": -5.5}, "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": 32.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "32.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 30.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -7.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -3.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[33.646, -6.25], [33.75, -6.5], [33.53, -7.03], [33.0, -7.25], [32.75, -7.146], [32.726, -7.156], [32.712, -7.162], [32.677, -7.177], [32.53, -7.53], [32.0, -7.75], [31.47, -7.53], [31.25, -7.0], [31.354, -6.751], [31.354, -6.75], [31.323, -6.677], [31.25, -6.646], [31.249, -6.646], [31.0, -6.75], [30.47, -6.53], [30.323, -6.177], [29.97, -6.03], [29.75, -5.5], [29.97, -4.97], [30.323, -4.823], [30.354, -4.75], [30.354, -4.749], [30.25, -4.5], [30.47, -3.97], [31.0, -3.75], [31.25, -3.854], [31.251, -3.854], [31.5, -3.75], [31.749, -3.854], [31.823, -3.823], [31.854, -3.75], [31.854, -3.749], [31.75, -3.5], [31.97, -2.97], [32.5, -2.75], [33.03, -2.97], [33.25, -3.5], [33.146, -3.75], [33.156, -3.774], [33.177, -3.823], [33.53, -3.97], [33.75, -4.5], [33.646, -4.75], [33.75, -5.0], [33.646, -5.25], [33.75, -5.5], [33.646, -5.75], [33.75, -6.0], [33.646, -6.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-07-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[31.32322330470336, -6.6767766952966365], [30.96966991411009, -6.5303300858899105], [30.75, -6.0], [30.96966991411009, -5.4696699141100895], [31.32322330470336, -5.3232233047033635], [31.353553390593273, -5.25], [31.25, -5.0], [31.46966991411009, -4.4696699141100895], [31.82322330470336, -4.3232233047033635], [31.96966991411009, -3.9696699141100895], [32.5, -3.75], [32.75, -3.8535533905932744], [33.0, -3.75], [33.53033008588991, -3.9696699141100895], [33.75, -4.5], [33.64644660940672, -4.75], [33.75, -5.0], [33.64644660940672, -5.25], [33.75, -5.5], [33.64644660940672, -5.75], [33.75, -6.0], [33.64644660940672, -6.25], [33.75, -6.5], [33.53033008588991, -7.0303300858899105], [33.0, -7.25], [32.75, -7.146446609406726], [32.5, -7.25], [32.25, -7.146446609406726], [32.0, -7.25], [31.46966991411009, -7.0303300858899105], [31.32322330470336, -6.6767766952966365]]]}, "2021-07-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[31.32322330470336, -6.6767766952966365], [30.96966991411009, -6.5303300858899105], [30.75, -6.0], [30.96966991411009, -5.4696699141100895], [31.32322330470336, -5.3232233047033635], [31.353553390593273, -5.25], [31.32322330470336, -5.1767766952966365], [30.96966991411009, -5.0303300858899105], [30.75, -4.5], [30.96966991411009, -3.9696699141100895], [31.5, -3.75], [31.75, -3.853553390593274], [31.82322330470336, -3.823223304703363], [31.853553390593273, -3.75], [31.75, -3.5], [31.96966991411009, -2.9696699141100895], [32.5, -2.75], [33.03033008588991, -2.9696699141100895], [33.25, -3.5], [33.14644660940672, -3.75], [33.17677669529664, -3.823223304703363], [33.53033008588991, -3.9696699141100895], [33.75, -4.5], [33.64644660940672, -4.75], [33.75, -5.0], [33.64644660940672, -5.25], [33.75, -5.5], [33.64644660940672, -5.75], [33.75, -6.0], [33.64644660940672, -6.25], [33.75, -6.5], [33.53033008588991, -7.0303300858899105], [33.0, -7.25], [32.75, -7.146446609406726], [32.5, -7.25], [32.25, -7.146446609406726], [32.0, -7.25], [31.46966991411009, -7.0303300858899105], [31.32322330470336, -6.6767766952966365]]]}, "2021-07-05T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[30.32322330470336, -6.1767766952966365], [29.96966991411009, -6.0303300858899105], [29.75, -5.5], [29.96966991411009, -4.9696699141100895], [30.32322330470336, -4.8232233047033635], [30.46966991411009, -4.4696699141100895], [30.82322330470336, -4.3232233047033635], [30.96966991411009, -3.9696699141100895], [31.5, -3.75], [31.75, -3.853553390593274], [31.82322330470336, -3.823223304703363], [31.853553390593273, -3.75], [31.75, -3.5], [31.96966991411009, -2.9696699141100895], [32.5, -2.75], [33.03033008588991, -2.9696699141100895], [33.25, -3.5], [33.14644660940672, -3.75], [33.17677669529664, -3.823223304703363], [33.53033008588991, -3.9696699141100895], [33.75, -4.5], [33.64644660940672, -4.75], [33.75, -5.0], [33.64644660940672, -5.25], [33.75, -5.5], [33.64644660940672, -5.75], [33.75, -6.0], [33.64644660940672, -6.25], [33.75, -6.5], [33.53033008588991, -7.0303300858899105], [33.0, -7.25], [32.75, -7.146446609406726], [32.5, -7.25], [32.25, -7.146446609406726], [32.0, -7.25], [31.46966991411009, -7.0303300858899105], [31.32322330470336, -6.6767766952966365], [31.25, -6.646446609406726], [31.0, -6.75], [30.46966991411009, -6.5303300858899105], [30.32322330470336, -6.1767766952966365]]]}, "2021-07-06T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[30.32322330470336, -6.1767766952966365], [29.96966991411009, -6.0303300858899105], [29.75, -5.5], [29.96966991411009, -4.9696699141100895], [30.32322330470336, -4.8232233047033635], [30.353553390593273, -4.75], [30.25, -4.5], [30.46966991411009, -3.9696699141100895], [31.0, -3.75], [31.25, -3.8535533905932735], [31.5, -3.75], [31.75, -3.853553390593274], [31.82322330470336, -3.823223304703363], [31.853553390593273, -3.75], [31.75, -3.5], [31.96966991411009, -2.9696699141100895], [32.5, -2.75], [33.03033008588991, -2.9696699141100895], [33.25, -3.5], [33.14644660940672, -3.75], [33.17677669529664, -3.823223304703363], [33.53033008588991, -3.9696699141100895], [33.75, -4.5], [33.64644660940672, -4.75], [33.75, -5.0], [33.64644660940672, -5.25], [33.75, -5.5], [33.64644660940672, -5.75], [33.75, -6.0], [33.64644660940672, -6.25], [33.75, -6.5], [33.53033008588991, -7.0303300858899105], [33.0, -7.25], [32.75, -7.146446609406726], [32.67677669529664, -7.1767766952966365], [32.53033008588991, -7.5303300858899105], [32.0, -7.75], [31.46966991411009, -7.5303300858899105], [31.25, -7.0], [31.353553390593273, -6.75], [31.32322330470336, -6.6767766952966365], [31.25, -6.646446609406726], [31.0, -6.75], [30.46966991411009, -6.5303300858899105], [30.32322330470336, -6.1767766952966365]]]}, "2021-07-07T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[30.32322330470336, -6.1767766952966365], [29.96966991411009, -6.0303300858899105], [29.75, -5.5], [29.96966991411009, -4.9696699141100895], [30.32322330470336, -4.8232233047033635], [30.353553390593273, -4.75], [30.25, -4.5], [30.46966991411009, -3.9696699141100895], [31.0, -3.75], [31.25, -3.8535533905932735], [31.5, -3.75], [31.75, -3.853553390593274], [31.82322330470336, -3.823223304703363], [31.853553390593273, -3.75], [31.75, -3.5], [31.96966991411009, -2.9696699141100895], [32.5, -2.75], [33.03033008588991, -2.9696699141100895], [33.25, -3.5], [33.14644660940672, -3.75], [33.17677669529664, -3.823223304703363], [33.53033008588991, -3.9696699141100895], [33.75, -4.5], [33.64644660940672, -4.75], [33.75, -5.0], [33.64644660940672, -5.25], [33.75, -5.5], [33.64644660940672, -5.75], [33.75, -6.0], [33.64644660940672, -6.25], [33.75, -6.5], [33.53033008588991, -7.0303300858899105], [33.0, -7.25], [32.75, -7.146446609406726], [32.67677669529664, -7.1767766952966365], [32.53033008588991, -7.5303300858899105], [32.0, -7.75], [31.46966991411009, -7.5303300858899105], [31.25, -7.0], [31.353553390593273, -6.75], [31.32322330470336, -6.6767766952966365], [31.25, -6.646446609406726], [31.0, -6.75], [30.46966991411009, -6.5303300858899105], [30.32322330470336, -6.1767766952966365]]]}, "2021-07-08T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[30.32322330470336, -6.1767766952966365], [29.96966991411009, -6.0303300858899105], [29.75, -5.5], [29.96966991411009, -4.9696699141100895], [30.32322330470336, -4.8232233047033635], [30.353553390593273, -4.75], [30.25, -4.5], [30.46966991411009, -3.9696699141100895], [31.0, -3.75], [31.5, -3.9571067811865475], [31.82322330470336, -3.823223304703363], [31.96966991411009, -3.4696699141100895], [32.5, -3.25], [33.03033008588991, -3.4696699141100895], [33.25, -4.0], [33.14644660940672, -4.25], [33.25, -4.5], [33.14644660940672, -4.75], [33.17677669529664, -4.8232233047033635], [33.53033008588991, -4.9696699141100895], [33.75, -5.5], [33.64644660940672, -5.75], [33.75, -6.0], [33.64644660940672, -6.25], [33.75, -6.5], [33.53033008588991, -7.0303300858899105], [33.0, -7.25], [32.75, -7.146446609406726], [32.67677669529664, -7.1767766952966365], [32.53033008588991, -7.5303300858899105], [32.0, -7.75], [31.46966991411009, -7.5303300858899105], [31.25, -7.0], [31.353553390593273, -6.75], [31.32322330470336, -6.6767766952966365], [31.25, -6.646446609406726], [31.0, -6.75], [30.46966991411009, -6.5303300858899105], [30.32322330470336, -6.1767766952966365]]]}, "2021-07-09T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[32.32322330470336, -6.176776695296637], [31.96966991411009, -6.0303300858899105], [31.75, -5.5], [31.96966991411009, -4.9696699141100895], [32.5, -4.75], [33.03033008588991, -4.9696699141100895], [33.17677669529664, -5.3232233047033635], [33.53033008588991, -5.4696699141100895], [33.75, -6.0], [33.53033008588991, -6.5303300858899105], [33.0, -6.75], [32.46966991411009, -6.5303300858899105], [32.32322330470336, -6.176776695296637]]]}, "2021-07-10T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[30.353553390593273, -5.75], [30.25, -5.5], [30.46966991411009, -4.9696699141100895], [31.0, -4.75], [31.5, -4.957106781186547], [32.0, -4.75], [32.25, -4.853553390593274], [32.5, -4.75], [33.03033008588991, -4.9696699141100895], [33.17677669529664, -5.3232233047033635], [33.53033008588991, -5.4696699141100895], [33.75, -6.0], [33.53033008588991, -6.5303300858899105], [33.17677669529664, -6.6767766952966365], [33.03033008588991, -7.0303300858899105], [32.5, -7.25], [32.25, -7.146446609406726], [32.0, -7.25], [31.46966991411009, -7.0303300858899105], [31.32322330470336, -6.6767766952966365], [31.25, -6.646446609406726], [31.0, -6.75], [30.46966991411009, -6.5303300858899105], [30.25, -6.0], [30.353553390593273, -5.75]]]}, "2021-07-11T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[30.353553390593273, -5.75], [30.25, -5.5], [30.46966991411009, -4.9696699141100895], [31.0, -4.75], [31.5, -4.957106781186547], [32.0, -4.75], [32.25, -4.853553390593274], [32.5, -4.75], [33.03033008588991, -4.9696699141100895], [33.17677669529664, -5.3232233047033635], [33.53033008588991, -5.4696699141100895], [33.75, -6.0], [33.53033008588991, -6.5303300858899105], [33.17677669529664, -6.6767766952966365], [33.03033008588991, -7.0303300858899105], [32.5, -7.25], [32.25, -7.146446609406726], [32.0, -7.25], [31.46966991411009, -7.0303300858899105], [31.32322330470336, -6.6767766952966365], [31.25, -6.646446609406726], [31.0, -6.75], [30.46966991411009, -6.5303300858899105], [30.25, -6.0], [30.353553390593273, -5.75]]]}, "2021-07-12T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[30.353553390593273, -5.75], [30.25, -5.5], [30.46966991411009, -4.9696699141100895], [31.0, -4.75], [31.5, -4.957106781186547], [32.0, -4.75], [32.25, -4.853553390593274], [32.5, -4.75], [33.03033008588991, -4.9696699141100895], [33.25, -5.5], [33.14644660940672, -5.75], [33.25, -6.0], [33.14644660940672, -6.25], [33.25, -6.5], [33.03033008588991, -7.0303300858899105], [32.5, -7.25], [32.25, -7.146446609406726], [32.0, -7.25], [31.46966991411009, -7.0303300858899105], [31.32322330470336, -6.6767766952966365], [31.25, -6.646446609406726], [31.0, -6.75], [30.46966991411009, -6.5303300858899105], [30.25, -6.0], [30.353553390593273, -5.75]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.850831012642516}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7097543807799656}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.652231093667012, 20.63974880161652, 20.253203260383202, 20.03792258387358, 20.169845273439932, 20.057331185675082, 20.669438910197982, 20.022268795064463, 19.567549473010388, 20.272360052898875]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.196784756904833, 19.92184346969026, 19.110154520617755, 18.379220959945712, 18.549974823370633, 18.37719396726493, 20.63412869769968, 19.414041263313152, 18.869266710439604, 19.379420228326296]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5849788959298432, -1.6061331706003592, -1.7301640923450918, -1.8124791687966506, -1.6526674056423085, -1.6813507910450125, -1.4068747313737333, -1.7253071067108294, -2.212667147398099, -1.5066830992831735]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.060960809153471, -2.155349402485058, -2.850831012642516, -2.6856349466656866, -2.3292394484342367, -2.3446262048313997, -1.4075397237299399, -2.176210261693484, -2.6342945864467993, -1.6991172700386983]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6686705100055879, -1.6509228477210858, -1.7624732135398171, -1.8209380033579927, -1.6706836487855623, -1.6880369750647248, -1.3195486797828129, -1.7066131145603083, -2.2862751729791113, -1.672052158870141]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9840406515041067, -1.9486837591019501, -2.4785248549590992, -2.448404544413302, -2.222085110028792, -2.075890967451436, -1.3237971687847299, -1.9913161024612227, -2.587435266567283, -1.9824097165778893]}}