{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:13.834355", "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-Dec-22_to_2022-Dec-24_308.5_-0.5"}, "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": 2022120001017}, "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": "December 22 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 24 2022"}, "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": 89602.77668906352}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": ["Atlantic 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": -0.5}, "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": 308.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "308.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 308.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 312.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -1.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 3.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-52.18, 0.18], [-52.03, 0.53], [-51.62, 0.7], [-51.75, 1.0], [-51.65, 1.25], [-51.75, 1.5], [-51.53, 2.03], [-51.18, 2.18], [-51.03, 2.53], [-50.68, 2.68], [-50.53, 3.03], [-50.0, 3.25], [-49.75, 3.15], [-49.68, 3.18], [-49.53, 3.53], [-49.0, 3.75], [-48.75, 3.65], [-48.5, 3.75], [-48.25, 3.65], [-48.0, 3.75], [-47.47, 3.53], [-47.25, 3.0], [-47.47, 2.47], [-48.0, 2.25], [-48.25, 2.35], [-48.32, 2.32], [-48.35, 2.25], [-48.25, 2.0], [-48.37, 1.7], [-47.97, 1.53], [-47.75, 1.0], [-47.97, 0.47], [-48.5, 0.25], [-48.75, 0.35], [-49.0, 0.25], [-49.3, 0.38], [-49.47, -0.03], [-49.82, -0.18], [-49.96, -0.5], [-49.82, -0.82], [-49.47, -0.97], [-49.25, -1.5], [-49.47, -2.03], [-50.0, -2.25], [-50.53, -2.03], [-50.68, -1.68], [-50.75, -1.65], [-51.0, -1.75], [-51.5, -1.54], [-52.0, -1.75], [-52.53, -1.53], [-52.75, -1.0], [-52.65, -0.75], [-52.75, -0.5], [-52.53, 0.03], [-52.18, 0.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America", "N.E.South-America", "Equatorial.Atlantic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.75, -0.5], [-52.52999999999997, 0.03], [-52.18000000000001, 0.18], [-52.02999999999997, 0.53], [-51.620000000000005, 0.7], [-51.75, 1.0], [-51.64999999999998, 1.25], [-51.75, 1.5], [-51.52999999999997, 2.03], [-51.18000000000001, 2.18], [-51.02999999999997, 2.53], [-50.68000000000001, 2.68], [-50.52999999999997, 3.03], [-50.0, 3.25], [-49.75, 3.15], [-49.68000000000001, 3.18], [-49.52999999999997, 3.53], [-49.0, 3.75], [-48.75, 3.65], [-48.5, 3.75], [-48.25, 3.65], [-48.0, 3.75], [-47.47000000000003, 3.53], [-47.25, 3.0], [-47.47000000000003, 2.47], [-48.0, 2.25], [-48.25, 2.35], [-48.31999999999999, 2.32], [-48.35000000000002, 2.25], [-48.25, 2.0], [-48.370000000000005, 1.7], [-47.97000000000003, 1.53], [-47.75, 1.0], [-47.97000000000003, 0.47], [-48.5, 0.25], [-48.75, 0.35], [-49.0, 0.25], [-49.30000000000001, 0.38], [-49.47000000000003, -0.03], [-49.81999999999999, -0.18], [-49.95999999999998, -0.5], [-49.81999999999999, -0.82], [-49.47000000000003, -0.97], [-49.25, -1.5], [-49.47000000000003, -2.03], [-50.0, -2.25], [-50.52999999999997, -2.03], [-50.68000000000001, -1.68], [-50.75, -1.65], [-51.0, -1.75], [-51.5, -1.54], [-52.0, -1.75], [-52.52999999999997, -1.53], [-52.75, -1.0], [-52.64999999999998, -0.75], [-52.75, -0.5]]]]}, "2022-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.75, -0.5], [-52.52999999999997, 0.03], [-52.18000000000001, 0.18], [-52.02999999999997, 0.53], [-51.620000000000005, 0.7], [-51.75, 1.0], [-51.64999999999998, 1.25], [-51.75, 1.5], [-51.52999999999997, 2.03], [-51.18000000000001, 2.18], [-51.02999999999997, 2.53], [-50.68000000000001, 2.68], [-50.52999999999997, 3.03], [-50.0, 3.25], [-49.75, 3.15], [-49.68000000000001, 3.18], [-49.52999999999997, 3.53], [-49.0, 3.75], [-48.75, 3.65], [-48.5, 3.75], [-48.25, 3.65], [-48.0, 3.75], [-47.47000000000003, 3.53], [-47.25, 3.0], [-47.47000000000003, 2.47], [-48.0, 2.25], [-48.25, 2.35], [-48.31999999999999, 2.32], [-48.35000000000002, 2.25], [-48.25, 2.0], [-48.370000000000005, 1.7], [-47.97000000000003, 1.53], [-47.75, 1.0], [-47.97000000000003, 0.47], [-48.5, 0.25], [-48.75, 0.35], [-49.0, 0.25], [-49.30000000000001, 0.38], [-49.47000000000003, -0.03], [-49.81999999999999, -0.18], [-49.95999999999998, -0.5], [-49.81999999999999, -0.82], [-49.47000000000003, -0.97], [-49.25, -1.5], [-49.47000000000003, -2.03], [-50.0, -2.25], [-50.52999999999997, -2.03], [-50.68000000000001, -1.68], [-50.75, -1.65], [-51.0, -1.75], [-51.5, -1.54], [-52.0, -1.75], [-52.52999999999997, -1.53], [-52.75, -1.0], [-52.64999999999998, -0.75], [-52.75, -0.5]]]]}, "2022-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.75, -0.5], [-52.52999999999997, 0.03], [-52.18000000000001, 0.18], [-52.02999999999997, 0.53], [-51.620000000000005, 0.7], [-51.75, 1.0], [-51.64999999999998, 1.25], [-51.75, 1.5], [-51.52999999999997, 2.03], [-51.18000000000001, 2.18], [-51.02999999999997, 2.53], [-50.68000000000001, 2.68], [-50.52999999999997, 3.03], [-50.0, 3.25], [-49.75, 3.15], [-49.68000000000001, 3.18], [-49.52999999999997, 3.53], [-49.0, 3.75], [-48.75, 3.65], [-48.5, 3.75], [-48.25, 3.65], [-48.0, 3.75], [-47.47000000000003, 3.53], [-47.25, 3.0], [-47.47000000000003, 2.47], [-48.0, 2.25], [-48.25, 2.35], [-48.31999999999999, 2.32], [-48.35000000000002, 2.25], [-48.25, 2.0], [-48.370000000000005, 1.7], [-47.97000000000003, 1.53], [-47.75, 1.0], [-47.97000000000003, 0.47], [-48.5, 0.25], [-48.75, 0.35], [-49.0, 0.25], [-49.30000000000001, 0.38], [-49.47000000000003, -0.03], [-49.81999999999999, -0.18], [-49.95999999999998, -0.5], [-49.81999999999999, -0.82], [-49.47000000000003, -0.97], [-49.25, -1.5], [-49.47000000000003, -2.03], [-50.0, -2.25], [-50.52999999999997, -2.03], [-50.68000000000001, -1.68], [-50.75, -1.65], [-51.0, -1.75], [-51.5, -1.54], [-52.0, -1.75], [-52.52999999999997, -1.53], [-52.75, -1.0], [-52.64999999999998, -0.75], [-52.75, -0.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.244393090005815}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.3155692719323002}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.483277865220487, 24.969296650021647, 25.58619121896311]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.731029813125815, 24.046936007556837, 24.897268920527154]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2009753168195634, -1.6937209246269476, -1.05201157435039]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.164621389724573, -3.244393090005815, -2.019605711484644]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.616968030496297, -2.2840018417362704, -1.4438369925828223]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0851344024590213, -2.9737933218731967, -1.741702597613803]}}