{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:49.154663", "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": "2023-Mar-25_to_2023-Mar-29_298.0_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": 2023030000830}, "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": "March 25 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 29 2023"}, "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": 64695.62017560596}, "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": ["Brazil", "Guyana", "Venezuela, Bolivarian Republic of"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "America", "America"]}, "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": 298.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "298.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 295.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 299.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 3.0}, "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": "MultiPolygon", "coordinates": [[[[-65.18, 4.68], [-65.03, 5.03], [-64.5, 5.25], [-64.25, 5.15], [-64.0, 5.25], [-63.75, 5.15], [-63.5, 5.25], [-63.25, 5.15], [-63.18, 5.18], [-63.04, 5.5], [-63.25, 6.0], [-63.03, 6.53], [-62.5, 6.75], [-62.25, 6.65], [-62.0, 6.75], [-61.75, 6.65], [-61.5, 6.75], [-61.25, 6.65], [-61.0, 6.75], [-60.47, 6.53], [-60.25, 6.0], [-60.46, 5.5], [-60.25, 5.0], [-60.47, 4.47], [-61.0, 4.25], [-61.53, 4.47], [-61.68, 4.82], [-61.75, 4.85], [-61.82, 4.82], [-61.97, 4.47], [-62.32, 4.32], [-62.35, 4.25], [-62.25, 4.0], [-62.35, 3.75], [-62.25, 3.5], [-62.47, 2.97], [-63.0, 2.75], [-63.3, 2.88], [-63.47, 2.47], [-64.0, 2.25], [-64.53, 2.47], [-64.68, 2.82], [-65.03, 2.97], [-65.18, 3.32], [-65.53, 3.47], [-65.75, 4.0], [-65.53, 4.53], [-65.18, 4.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.52999999999997, 6.03], [-62.0, 6.25], [-61.47000000000003, 6.03], [-61.25, 5.5], [-61.47000000000003, 4.97], [-62.0, 4.75], [-62.52999999999997, 4.97], [-62.75, 5.5], [-62.52999999999997, 6.03]]]]}, "2023-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.52999999999997, 3.47], [-65.75, 4.0], [-65.52999999999997, 4.53], [-65.18, 4.68], [-65.02999999999997, 5.03], [-64.5, 5.25], [-64.25, 5.15], [-64.0, 5.25], [-63.75, 5.15], [-63.5, 5.25], [-63.25, 5.15], [-63.18000000000001, 5.18], [-63.04000000000002, 5.5], [-63.25, 6.0], [-63.02999999999997, 6.53], [-62.5, 6.75], [-62.25, 6.65], [-62.0, 6.75], [-61.75, 6.65], [-61.5, 6.75], [-61.25, 6.65], [-61.0, 6.75], [-60.47000000000003, 6.53], [-60.25, 6.0], [-60.45999999999998, 5.5], [-60.25, 5.0], [-60.47000000000003, 4.47], [-61.0, 4.25], [-61.52999999999997, 4.47], [-61.68000000000001, 4.82], [-61.75, 4.85], [-61.81999999999999, 4.82], [-61.97000000000003, 4.47], [-62.31999999999999, 4.32], [-62.35000000000002, 4.25], [-62.25, 4.0], [-62.35000000000002, 3.75], [-62.25, 3.5], [-62.47000000000003, 2.97], [-63.0, 2.75], [-63.30000000000001, 2.88], [-63.47000000000003, 2.47], [-64.0, 2.25], [-64.52999999999997, 2.47], [-64.68, 2.82], [-65.02999999999997, 2.97], [-65.18, 3.32], [-65.52999999999997, 3.47]]]]}, "2023-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.52999999999997, 3.47], [-65.75, 4.0], [-65.52999999999997, 4.53], [-65.18, 4.68], [-65.02999999999997, 5.03], [-64.5, 5.25], [-64.25, 5.15], [-64.0, 5.25], [-63.75, 5.15], [-63.5, 5.25], [-63.25, 5.15], [-63.18000000000001, 5.18], [-63.04000000000002, 5.5], [-63.25, 6.0], [-63.02999999999997, 6.53], [-62.5, 6.75], [-62.25, 6.65], [-62.0, 6.75], [-61.75, 6.65], [-61.5, 6.75], [-61.25, 6.65], [-61.0, 6.75], [-60.47000000000003, 6.53], [-60.25, 6.0], [-60.45999999999998, 5.5], [-60.25, 5.0], [-60.47000000000003, 4.47], [-61.0, 4.25], [-61.52999999999997, 4.47], [-61.68000000000001, 4.82], [-61.75, 4.85], [-61.81999999999999, 4.82], 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5.47], [-62.0, 5.25], [-62.25, 5.35], [-62.5, 5.25], [-63.02999999999997, 5.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.899249199301437}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.809513694634048}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.68583315013302, 20.5828588327243, 20.848170553260502, 20.97670724661242, 20.258381427323798]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.68583315013302, 18.038238048135838, 18.63496168897194, 18.766765020161927, 19.067719463256196]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4319072391528493, -2.0673916405238977, -1.7922062689098002, -1.6436972886670127, -1.5114562089618744]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.4319072391528493, -2.899249199301437, -2.2769758637043083, -2.1654692067972405, -1.921817448727495]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6589748299195188, -1.9665810558126338, -1.7294866902833312, -1.6114948210758508, -1.563419699323159]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6589748299195188, -2.5638048423197937, -2.1954758239963654, -2.019816281464515, -1.76145091651644]}}