{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:48.832626", "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": "2022-Sep-03_to_2022-Sep-07_35.0_6.5"}, "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": 2022090000215}, "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": "September 03 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 07 2022"}, "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": 58364.36074935629}, "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": 6.5}, "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": 35.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "35.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 33.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 35.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 7.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[32.82, 6.68], [32.85, 6.75], [32.75, 7.0], [32.85, 7.25], [32.75, 7.5], [32.97, 8.03], [33.5, 8.25], [34.03, 8.03], [34.18, 7.68], [34.25, 7.65], [34.32, 7.68], [34.47, 8.03], [35.0, 8.25], [35.53, 8.03], [35.75, 7.5], [35.65, 7.25], [35.75, 7.0], [35.65, 6.75], [35.75, 6.5], [35.65, 6.25], [35.75, 6.0], [35.65, 5.75], [35.75, 5.5], [35.53, 4.97], [35.0, 4.75], [34.75, 4.85], [34.5, 4.75], [34.25, 4.85], [34.0, 4.75], [33.75, 4.85], [33.5, 4.75], [32.97, 4.97], [32.82, 5.32], [32.47, 5.47], [32.25, 6.0], [32.47, 6.53], [32.82, 6.68]]]]}}, "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": {"2022-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.47, 5.47], [32.25, 6.0], [32.47, 6.53], [32.82, 6.68], [32.85, 6.75], [32.75, 7.0], [32.85, 7.25], [32.75, 7.5], [32.97, 8.03], [33.5, 8.25], [34.03, 8.03], [34.18, 7.68], [34.25, 7.65], [34.32, 7.68], [34.47, 8.03], [35.0, 8.25], [35.53, 8.03], [35.75, 7.5], [35.65, 7.25], [35.75, 7.0], [35.65, 6.75], [35.75, 6.5], [35.65, 6.25], [35.75, 6.0], [35.65, 5.75], [35.75, 5.5], [35.53, 4.97], [35.0, 4.75], [34.75, 4.85], [34.5, 4.75], [34.25, 4.85], [34.0, 4.75], [33.75, 4.85], [33.5, 4.75], [32.97, 4.97], [32.82, 5.32], [32.47, 5.47]]]]}, "2022-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.47, 5.47], [32.25, 6.0], [32.47, 6.53], [32.82, 6.68], [32.85, 6.75], [32.75, 7.0], [32.85, 7.25], [32.75, 7.5], [32.97, 8.03], [33.5, 8.25], [34.03, 8.03], [34.18, 7.68], [34.25, 7.65], [34.32, 7.68], [34.47, 8.03], [35.0, 8.25], [35.53, 8.03], [35.75, 7.5], [35.65, 7.25], [35.75, 7.0], [35.65, 6.75], [35.75, 6.5], [35.65, 6.25], [35.75, 6.0], [35.65, 5.75], [35.75, 5.5], [35.53, 4.97], [35.0, 4.75], [34.75, 4.85], [34.5, 4.75], [34.25, 4.85], [34.0, 4.75], [33.75, 4.85], [33.5, 4.75], [32.97, 4.97], [32.82, 5.32], [32.47, 5.47]]]]}, "2022-09-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.47, 5.47], [32.25, 6.0], [32.47, 6.53], [32.82, 6.68], [32.85, 6.75], [32.75, 7.0], [32.85, 7.25], [32.75, 7.5], [32.97, 8.03], [33.5, 8.25], [34.03, 8.03], [34.18, 7.68], [34.25, 7.65], [34.32, 7.68], [34.47, 8.03], [35.0, 8.25], [35.53, 8.03], [35.75, 7.5], [35.65, 7.25], [35.75, 7.0], [35.65, 6.75], [35.75, 6.5], [35.65, 6.25], [35.75, 6.0], [35.65, 5.75], [35.75, 5.5], [35.53, 4.97], [35.0, 4.75], [34.75, 4.85], [34.5, 4.75], [34.25, 4.85], [34.0, 4.75], [33.75, 4.85], [33.5, 4.75], [32.97, 4.97], [32.82, 5.32], [32.47, 5.47]]]]}, "2022-09-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.75, 6.0], [33.85, 6.25], [33.75, 6.5], [33.85, 6.75], [33.75, 7.0], [33.97, 7.53], [34.32, 7.68], [34.47, 8.03], [35.0, 8.25], [35.53, 8.03], [35.75, 7.5], [35.65, 7.25], [35.75, 7.0], [35.65, 6.75], [35.75, 6.5], [35.54, 6.0], [35.75, 5.5], [35.53, 4.97], [35.0, 4.75], [34.75, 4.85], [34.5, 4.75], [33.97, 4.97], [33.75, 5.5], [33.85, 5.75], [33.75, 6.0]]]]}, "2022-09-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.25, 7.5], [34.47, 8.03], [35.0, 8.25], [35.53, 8.03], [35.75, 7.5], [35.54, 7.0], [35.75, 6.5], [35.53, 5.97], [35.0, 5.75], [34.47, 5.97], [34.25, 6.5], [34.46, 7.0], [34.25, 7.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.678718364426345}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.1430828417338557}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.327249134262104, 24.03705038640277, 23.941822200744127, 23.358933652175494, 22.803534028629088]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.80570699559553, 21.255445354323285, 21.477539881821997, 20.929488974259016, 21.74086887122769]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.305257205796923, -2.62535922987799, -2.7051248132776298, -2.824669229808464, -2.4550564138011453]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.678718364426345, -3.8760046079524386, -3.5137371846117276, -3.6454951759827736, -2.838930340020852]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.309042778636324, -1.3992872783625923, -1.398149555016676, -1.5768652115890804, -1.5203652986610656]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.9103897117384485, -1.9762212668130397, -1.7292128441181889, -2.154083220260701, -1.6140684205728482]}}