{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:21:47.305630", "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-Jan-10_to_2021-Jan-12_38.5_-8.5"}, "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": 2021010000469}, "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 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 12 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 60899.85562475403}, "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": ["Mozambique", "Tanzania, United Republic of"]}, "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": ["Indian Ocean"]}, "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": -8.5}, "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": 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": 40.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -11.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -8.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[37.354, -8.75], [37.25, -8.5], [37.47, -7.97], [38.0, -7.75], [38.25, -7.854], [38.5, -7.75], [39.03, -7.97], [39.177, -8.323], [39.53, -8.47], [39.677, -8.823], [40.03, -8.97], [40.25, -9.5], [40.146, -9.75], [40.177, -9.823], [40.25, -9.854], [40.5, -9.75], [41.03, -9.97], [41.25, -10.5], [41.146, -10.75], [41.25, -11.0], [41.03, -11.53], [40.5, -11.75], [40.25, -11.646], [40.0, -11.75], [39.75, -11.646], [39.5, -11.75], [38.97, -11.53], [38.823, -11.177], [38.5, -11.043], [38.0, -11.25], [37.47, -11.03], [37.25, -10.5], [37.457, -10.0], [37.25, -9.5], [37.354, -9.25], [37.25, -9.0], [37.354, -8.75]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Eastern-Africa", "E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-01-10T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[37.35355339059328, -9.25], [37.25, -9.0], [37.35355339059328, -8.75], [37.25, -8.5], [37.46966991411009, -7.9696699141100895], [38.0, -7.75], [38.25, -7.853553390593274], [38.5, -7.75], [39.03033008588991, -7.9696699141100895], [39.17677669529664, -8.323223304703363], [39.53033008588991, -8.469669914110089], [39.67677669529664, -8.823223304703363], [40.03033008588991, -8.969669914110089], [40.25, -9.5], [40.14644660940672, -9.75], [40.17677669529664, -9.823223304703363], [40.25, -9.853553390593275], [40.5, -9.75], [41.03033008588991, -9.969669914110089], [41.25, -10.5], [41.14644660940672, -10.75], [41.25, -11.0], [41.03033008588991, -11.530330085889911], [40.5, -11.75], [40.25, -11.646446609406725], [40.0, -11.75], [39.75, -11.646446609406725], [39.5, -11.75], [38.96966991411009, -11.530330085889911], [38.82322330470336, -11.176776695296637], [38.5, -11.042893218813452], [38.0, -11.25], [37.46966991411009, -11.030330085889911], [37.25, -10.5], [37.45710678118655, -10.0], [37.25, -9.5], [37.35355339059328, -9.25]]]}, "2021-01-11T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[37.35355339059328, -9.25], [37.25, -9.0], 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-11.030330085889911], [37.25, -10.5], [37.45710678118655, -10.0], [37.25, -9.5], [37.35355339059328, -9.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.5525243354313147}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.8226596684740979}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.123360190428116, 24.476010974643884, 24.487563250765447]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.47987679836433, 23.276350472086904, 23.188916677841178]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.1125504632023167, -1.7127325857727755, -1.6426959564472015]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5525243354313147, -2.2349890557701997, -2.2894725030855625]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9149398192215898, -1.661601759911378, -1.6262842590453068]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7351899280509477, -2.3196978083255724, -1.9964663240368477]}}