{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:10:57.652190", "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-09_to_2020-Jan-14_34.5_7.5"}, "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": 2020010000279}, "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 09 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": 6}, "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": 76636.7940626469}, "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", "South Sudan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 7.5}, "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": 34.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "34.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 32.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 34.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[32.323, 8.177], [32.47, 8.53], [32.823, 8.677], [32.854, 8.75], [32.75, 9.0], [32.97, 9.53], [33.5, 9.75], [33.75, 9.646], [34.0, 9.75], [34.53, 9.53], [34.677, 9.177], [35.03, 9.03], [35.25, 8.5], [35.146, 8.25], [35.25, 8.0], [35.146, 7.75], [35.25, 7.5], [35.146, 7.25], [35.25, 7.0], [35.03, 6.47], [34.5, 6.25], [34.25, 6.354], [34.177, 6.323], [34.03, 5.97], [33.677, 5.823], [33.646, 5.75], [33.677, 5.677], [34.03, 5.53], [34.25, 5.0], [34.03, 4.47], [33.5, 4.25], [33.25, 4.354], [33.0, 4.25], [32.47, 4.47], [32.25, 5.0], [32.354, 5.25], [32.25, 5.5], [32.354, 5.75], [32.25, 6.0], [32.354, 6.25], [32.323, 6.323], [31.97, 6.47], [31.75, 7.0], [31.854, 7.25], [31.75, 7.5], [31.97, 8.03], [32.323, 8.177]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-01-09T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[33.92677669529664, 7.073223304703361], [33.75, 7.5], [33.96966991411009, 8.030330085889911], [34.5, 8.25], [35.03033008588991, 8.030330085889911], [35.25, 7.5], [35.03033008588991, 6.9696699141100895], [34.5, 6.75], [34.07322330470336, 6.926776695296639], [34.25, 6.5], [34.03033008588991, 5.9696699141100895], [33.5, 5.75], [32.96966991411009, 5.9696699141100895], [32.75, 6.5], [32.96966991411009, 7.0303300858899105], [33.5, 7.25], [33.92677669529664, 7.073223304703361]]]}, "2020-01-10T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[33.92677669529664, 7.073223304703361], [33.75, 7.5], [33.96966991411009, 8.030330085889911], [34.5, 8.25], [35.03033008588991, 8.030330085889911], [35.25, 7.5], [35.03033008588991, 6.9696699141100895], [34.5, 6.75], [34.07322330470336, 6.926776695296639], [34.25, 6.5], [34.03033008588991, 5.9696699141100895], [33.5, 5.75], [32.96966991411009, 5.9696699141100895], [32.75, 6.5], [32.96966991411009, 7.0303300858899105], [33.5, 7.25], [33.92677669529664, 7.073223304703361]]]}, "2020-01-11T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[31.853553390593273, 7.25], [31.75, 7.5], [31.96966991411009, 8.030330085889911], [32.32322330470336, 8.176776695296638], [32.46966991411009, 8.530330085889911], [32.82322330470336, 8.676776695296637], [32.85355339059328, 8.75], [32.75, 9.0], [32.96966991411009, 9.530330085889911], [33.5, 9.75], [33.75, 9.646446609406725], [34.0, 9.75], [34.53033008588991, 9.530330085889911], [34.67677669529664, 9.176776695296637], [35.03033008588991, 9.030330085889911], [35.25, 8.5], [35.14644660940672, 8.25], [35.25, 8.0], [35.14644660940672, 7.75], [35.25, 7.5], [35.14644660940672, 7.25], [35.25, 7.0], [35.03033008588991, 6.4696699141100895], [34.5, 6.25], [34.25, 6.353553390593274], [34.17677669529664, 6.3232233047033635], [34.03033008588991, 5.9696699141100895], [33.67677669529664, 5.8232233047033635], [33.64644660940672, 5.75], [33.67677669529664, 5.6767766952966365], [34.03033008588991, 5.5303300858899105], [34.25, 5.0], [34.03033008588991, 4.4696699141100895], [33.5, 4.25], [33.25, 4.353553390593274], [33.0, 4.25], [32.46966991411009, 4.4696699141100895], [32.25, 5.0], [32.35355339059328, 5.25], [32.25, 5.5], [32.35355339059328, 5.75], [32.25, 6.0], [32.35355339059328, 6.25], [32.32322330470336, 6.323223304703363], [31.96966991411009, 6.4696699141100895], [31.75, 7.0], [31.853553390593273, 7.25]]]}, "2020-01-12T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[31.853553390593273, 7.25], [31.75, 7.5], [31.96966991411009, 8.030330085889911], [32.32322330470336, 8.176776695296638], [32.46966991411009, 8.530330085889911], [32.82322330470336, 8.676776695296637], [32.85355339059328, 8.75], [32.75, 9.0], [32.96966991411009, 9.530330085889911], [33.5, 9.75], [33.75, 9.646446609406725], [34.0, 9.75], [34.53033008588991, 9.530330085889911], [34.67677669529664, 9.176776695296637], [35.03033008588991, 9.030330085889911], [35.25, 8.5], [35.14644660940672, 8.25], [35.25, 8.0], [35.14644660940672, 7.75], [35.25, 7.5], [35.14644660940672, 7.25], [35.25, 7.0], [35.03033008588991, 6.4696699141100895], [34.5, 6.25], [34.25, 6.353553390593274], [34.17677669529664, 6.3232233047033635], [34.03033008588991, 5.9696699141100895], [33.67677669529664, 5.8232233047033635], [33.64644660940672, 5.75], [33.67677669529664, 5.6767766952966365], [34.03033008588991, 5.5303300858899105], [34.25, 5.0], [34.03033008588991, 4.4696699141100895], [33.5, 4.25], [33.25, 4.353553390593274], [33.0, 4.25], [32.46966991411009, 4.4696699141100895], [32.25, 5.0], [32.35355339059328, 5.25], [32.25, 5.5], [32.35355339059328, 5.75], [32.25, 6.0], [32.35355339059328, 6.25], [32.32322330470336, 6.323223304703363], [31.96966991411009, 6.4696699141100895], [31.75, 7.0], [31.853553390593273, 7.25]]]}, "2020-01-13T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[31.853553390593273, 7.25], [31.75, 7.5], [31.96966991411009, 8.030330085889911], [32.32322330470336, 8.176776695296638], [32.46966991411009, 8.530330085889911], [32.82322330470336, 8.676776695296637], [32.85355339059328, 8.75], [32.75, 9.0], [32.96966991411009, 9.530330085889911], [33.5, 9.75], [33.75, 9.646446609406725], [34.0, 9.75], [34.53033008588991, 9.530330085889911], [34.67677669529664, 9.176776695296637], [35.03033008588991, 9.030330085889911], [35.25, 8.5], [35.14644660940672, 8.25], [35.25, 8.0], [35.14644660940672, 7.75], [35.25, 7.5], [35.14644660940672, 7.25], [35.25, 7.0], [35.03033008588991, 6.4696699141100895], [34.5, 6.25], [34.25, 6.353553390593274], [34.17677669529664, 6.3232233047033635], [34.03033008588991, 5.9696699141100895], [33.67677669529664, 5.8232233047033635], [33.64644660940672, 5.75], [33.67677669529664, 5.6767766952966365], [34.03033008588991, 5.5303300858899105], [34.25, 5.0], [34.03033008588991, 4.4696699141100895], [33.5, 4.25], [33.25, 4.353553390593274], [33.0, 4.25], [32.46966991411009, 4.4696699141100895], [32.25, 5.0], [32.35355339059328, 5.25], [32.25, 5.5], [32.35355339059328, 5.75], [32.25, 6.0], [32.35355339059328, 6.25], [32.32322330470336, 6.323223304703363], [31.96966991411009, 6.4696699141100895], [31.75, 7.0], [31.853553390593273, 7.25]]]}, "2020-01-14T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[32.85355339059328, 7.75], [32.75, 8.0], [32.96966991411009, 8.530330085889911], [33.32322330470336, 8.676776695296637], [33.46966991411009, 9.030330085889911], [34.0, 9.25], [34.53033008588991, 9.030330085889911], [34.67677669529664, 8.676776695296637], [35.03033008588991, 8.530330085889911], [35.25, 8.0], [35.14644660940672, 7.75], [35.25, 7.5], [35.03033008588991, 6.9696699141100895], [34.5, 6.75], [34.0, 6.957106781186549], [33.5, 6.75], [32.96966991411009, 6.9696699141100895], [32.75, 7.5], [32.85355339059328, 7.75]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.727161935329036}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.2531778237961695}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.74542002191356, 27.86820750245704, 27.08188149299707, 25.72674574371632, 26.235749666418883, 27.45962591965241]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.535540693810447, 27.522210659548932, 23.670174315536485, 22.48345770867195, 23.178268566677446, 27.128974648832298]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2286443452397577, -2.114183214102326, -2.584700293081928, -3.986633733663484, -3.5385940836883627, -2.4029632687386027]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.623668863687101, -2.3684408969321566, -3.1019604450795555, -4.555338969771242, -4.727161935329036, -2.7623695916368547]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4632045333286061, -1.3797917337571617, -1.5283001923873034, -2.3652146286872897, -2.126919256064454, -1.5803679808341187]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.631116964019797, -1.4715002177878582, -1.7077356904126892, -2.8137802791312763, -2.9805249369958684, -1.7619505657312189]}}