{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:23:37.448276", "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-Apr-19_to_2021-Apr-24_314.5_-24.0"}, "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": 2021040000834}, "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": "April 19 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 24 2021"}, "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": 115055.08807600237}, "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", "Oceano Atl\u00e2ntico", "Santos Plateau"]}, "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": -24.0}, "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": 314.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "314.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 313.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 318.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-42.823, -24.823], [-42.47, -24.97], [-42.25, -25.5], [-42.354, -25.75], [-42.25, -26.0], [-42.354, -26.25], [-42.25, -26.5], [-42.47, -27.03], [-43.0, -27.25], [-43.25, -27.146], [-43.5, -27.25], [-43.75, -27.146], [-44.0, -27.25], [-44.53, -27.03], [-44.75, -26.5], [-44.646, -26.25], [-44.698, -26.125], [-44.823, -26.177], [-44.97, -26.53], [-45.323, -26.677], [-45.47, -27.03], [-46.0, -27.25], [-46.53, -27.03], [-46.677, -26.677], [-47.03, -26.53], [-47.25, -26.0], [-47.03, -25.47], [-46.677, -25.323], [-46.543, -25.0], [-46.677, -24.677], [-47.03, -24.53], [-47.25, -24.0], [-47.03, -23.47], [-46.5, -23.25], [-46.25, -23.354], [-46.0, -23.25], [-45.75, -23.354], [-45.5, -23.25], [-45.25, -23.354], [-45.0, -23.25], [-44.75, -23.354], [-44.677, -23.323], [-44.646, -23.25], [-44.75, -23.0], [-44.53, -22.47], [-44.0, -22.25], [-43.47, -22.47], [-43.323, -22.823], [-43.25, -22.854], [-43.177, -22.823], [-43.03, -22.47], [-42.5, -22.25], [-42.25, -22.354], [-42.177, -22.323], [-42.03, -21.97], [-41.5, -21.75], [-40.97, -21.97], [-40.75, -22.5], [-40.97, -23.03], [-41.323, -23.177], [-41.47, -23.53], [-42.0, -23.75], [-42.25, -23.646], [-42.323, -23.677], [-42.354, -23.75], [-42.25, -24.0], [-42.47, -24.53], [-42.823, -24.677], [-42.854, -24.749], [-42.854, -24.75], [-42.823, -24.823]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-04-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-46.25, -24.0], [-46.03033008588989, -23.46966991411009], [-45.5, -23.25], [-44.96966991411011, -23.46966991411009], [-44.75, -24.0], [-44.96966991411011, -24.53033008588991], [-45.5, -24.75], [-46.03033008588989, -24.53033008588991], [-46.25, -24.0]]]}, "2021-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-44.25, -25.5], [-44.14644660940672, -25.25], [-44.25, -25.0], [-44.03033008588989, -24.46966991411009], [-43.5, -24.25], [-42.96966991411011, -24.46966991411009], [-42.82322330470339, -24.82322330470336], [-42.46966991411011, -24.96966991411009], [-42.25, -25.5], [-42.35355339059328, -25.75], [-42.25, -26.0], [-42.35355339059328, -26.25], [-42.25, -26.5], [-42.46966991411011, -27.03033008588991], [-43.0, -27.25], [-43.53033008588989, -27.03033008588991], [-43.67677669529661, -26.67677669529664], [-44.03033008588989, -26.53033008588991], [-44.25, -26.0], [-44.14644660940672, -25.75], [-44.25, -25.5]]], [[[-47.03033008588989, -24.53033008588991], [-47.25, -24.0], [-47.03033008588989, -23.46966991411009], [-46.5, -23.25], [-46.25, -23.353553390593277], [-46.0, -23.25], [-45.75, -23.353553390593277], [-45.5, -23.25], [-44.96966991411011, -23.46966991411009], [-44.75, -24.0], [-44.96966991411011, -24.53033008588991], [-45.32322330470339, -24.67677669529664], [-45.46966991411011, -25.03033008588991], [-46.0, -25.25], [-46.53033008588989, -25.03033008588991], [-46.67677669529661, -24.67677669529664], [-47.03033008588989, -24.53033008588991]]]]}, "2021-04-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-46.67677669529661, -26.67677669529664], [-47.03033008588989, -26.53033008588991], [-47.25, -26.0], [-47.03033008588989, -25.46966991411009], [-46.67677669529661, -25.32322330470336], [-46.54289321881345, -25.0], [-46.67677669529661, -24.67677669529664], [-47.03033008588989, -24.53033008588991], [-47.25, -24.0], [-47.03033008588989, -23.46966991411009], [-46.5, -23.25], [-46.25, -23.353553390593277], [-46.0, -23.25], [-45.75, -23.353553390593277], [-45.5, -23.25], [-45.25, -23.353553390593277], [-45.0, -23.25], [-44.75, -23.353553390593277], [-44.67677669529661, -23.32322330470336], [-44.64644660940672, -23.25], [-44.75, -23.0], [-44.53033008588989, -22.46966991411009], [-44.0, -22.25], [-43.46966991411011, -22.46966991411009], [-43.32322330470339, -22.82322330470336], [-43.25, -22.853553390593277], [-43.17677669529661, -22.82322330470336], [-43.03033008588989, -22.46966991411009], [-42.5, -22.25], [-42.25, -22.353553390593277], [-42.17677669529661, -22.32322330470336], [-42.03033008588989, -21.96966991411009], [-41.5, -21.75], [-40.96966991411011, -21.96966991411009], [-40.75, -22.5], [-40.96966991411011, -23.03033008588991], [-41.32322330470339, -23.17677669529664], [-41.46966991411011, -23.53033008588991], [-42.0, -23.75], [-42.25, -23.646446609406723], [-42.32322330470339, -23.67677669529664], [-42.35355339059328, -23.75], [-42.25, -24.0], [-42.46966991411011, -24.53033008588991], [-42.82322330470339, -24.67677669529664], [-42.85355339059328, -24.75], [-42.82322330470339, -24.82322330470336], [-42.46966991411011, -24.96966991411009], [-42.25, -25.5], [-42.35355339059328, -25.75], [-42.25, -26.0], [-42.35355339059328, -26.25], [-42.25, -26.5], [-42.46966991411011, -27.03033008588991], [-43.0, -27.25], [-43.25, -27.146446609406723], [-43.5, -27.25], [-43.75, -27.146446609406723], [-44.0, -27.25], [-44.53033008588989, -27.03033008588991], [-44.75, -26.5], [-44.64644660940672, -26.25], [-44.69822330470333, -26.124999999999993], [-44.82322330470339, -26.17677669529664], [-44.96966991411011, -26.53033008588991], [-45.32322330470339, -26.67677669529664], [-45.46966991411011, -27.03033008588991], [-46.0, -27.25], [-46.53033008588989, -27.03033008588991], [-46.67677669529661, -26.67677669529664]]]}, "2021-04-22T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-46.67677669529661, -26.67677669529664], [-47.03033008588989, -26.53033008588991], [-47.25, -26.0], [-47.03033008588989, -25.46966991411009], [-46.67677669529661, -25.32322330470336], [-46.54289321881345, -25.0], [-46.67677669529661, -24.67677669529664], [-47.03033008588989, -24.53033008588991], [-47.25, -24.0], [-47.03033008588989, -23.46966991411009], [-46.5, -23.25], [-46.25, -23.353553390593277], [-46.0, -23.25], [-45.75, -23.353553390593277], [-45.5, -23.25], [-45.25, -23.353553390593277], [-45.0, -23.25], [-44.75, -23.353553390593277], [-44.67677669529661, -23.32322330470336], [-44.64644660940672, -23.25], [-44.75, -23.0], [-44.53033008588989, -22.46966991411009], [-44.0, -22.25], [-43.46966991411011, -22.46966991411009], [-43.32322330470339, -22.82322330470336], [-43.25, -22.853553390593277], [-43.17677669529661, -22.82322330470336], [-43.03033008588989, -22.46966991411009], [-42.5, -22.25], [-42.25, -22.353553390593277], [-42.17677669529661, -22.32322330470336], [-42.03033008588989, -21.96966991411009], [-41.5, -21.75], [-40.96966991411011, -21.96966991411009], [-40.75, -22.5], [-40.96966991411011, -23.03033008588991], [-41.32322330470339, -23.17677669529664], [-41.46966991411011, -23.53033008588991], [-42.0, -23.75], [-42.25, -23.646446609406723], [-42.32322330470339, -23.67677669529664], [-42.35355339059328, -23.75], [-42.25, -24.0], [-42.46966991411011, -24.53033008588991], [-42.82322330470339, -24.67677669529664], [-42.85355339059328, -24.75], [-42.82322330470339, -24.82322330470336], [-42.46966991411011, -24.96966991411009], [-42.25, -25.5], [-42.35355339059328, -25.75], [-42.25, -26.0], [-42.35355339059328, -26.25], [-42.25, -26.5], [-42.46966991411011, -27.03033008588991], [-43.0, -27.25], [-43.25, -27.146446609406723], [-43.5, -27.25], [-43.75, -27.146446609406723], [-44.0, -27.25], [-44.53033008588989, -27.03033008588991], [-44.75, -26.5], [-44.64644660940672, -26.25], [-44.69822330470333, -26.124999999999993], [-44.82322330470339, -26.17677669529664], [-44.96966991411011, -26.53033008588991], [-45.32322330470339, -26.67677669529664], [-45.46966991411011, -27.03033008588991], [-46.0, -27.25], [-46.53033008588989, -27.03033008588991], [-46.67677669529661, -26.67677669529664]]]}, "2021-04-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-46.67677669529661, -26.67677669529664], [-47.03033008588989, -26.53033008588991], [-47.25, -26.0], [-47.03033008588989, -25.46966991411009], [-46.67677669529661, -25.32322330470336], [-46.53033008588989, -24.96966991411009], [-46.17677669529661, -24.82322330470336], [-46.14644660940672, -24.75], [-46.17677669529661, -24.67677669529664], [-46.25, -24.646446609406723], [-46.5, -24.75], [-47.03033008588989, -24.53033008588991], [-47.25, -24.0], [-47.03033008588989, -23.46966991411009], [-46.5, -23.25], [-46.25, -23.353553390593277], [-46.0, -23.25], [-45.75, -23.353553390593277], [-45.5, -23.25], [-45.25, -23.353553390593277], [-45.0, -23.25], [-44.75, -23.353553390593277], [-44.67677669529661, -23.32322330470336], [-44.64644660940672, -23.25], [-44.75, -23.0], [-44.53033008588989, -22.46966991411009], [-44.0, -22.25], [-43.46966991411011, -22.46966991411009], [-43.32322330470339, -22.82322330470336], [-43.25, -22.853553390593277], [-43.17677669529661, -22.82322330470336], [-43.03033008588989, -22.46966991411009], [-42.5, -22.25], [-42.25, -22.353553390593277], [-42.17677669529661, -22.32322330470336], [-42.03033008588989, -21.96966991411009], [-41.5, -21.75], [-40.96966991411011, -21.96966991411009], [-40.75, -22.5], [-40.96966991411011, -23.03033008588991], [-41.32322330470339, -23.17677669529664], [-41.46966991411011, -23.53033008588991], [-42.0, -23.75], [-42.25, -23.646446609406723], [-42.32322330470339, -23.67677669529664], [-42.35355339059328, -23.75], [-42.25, -24.0], [-42.46966991411011, -24.53033008588991], [-42.82322330470339, -24.67677669529664], [-42.85355339059328, -24.75], [-42.82322330470339, -24.82322330470336], [-42.46966991411011, -24.96966991411009], [-42.25, -25.5], [-42.35355339059328, -25.75], [-42.25, -26.0], [-42.46966991411011, -26.53033008588991], [-42.82322330470339, -26.67677669529664], [-42.96966991411011, -27.03033008588991], [-43.5, -27.25], [-43.75, -27.146446609406723], [-44.0, -27.25], [-44.53033008588989, -27.03033008588991], [-44.75, -26.5], [-44.64644660940672, -26.25], [-44.69822330470333, -26.124999999999993], [-44.82322330470339, -26.17677669529664], [-44.96966991411011, -26.53033008588991], [-45.32322330470339, -26.67677669529664], [-45.46966991411011, -27.03033008588991], [-46.0, -27.25], [-46.53033008588989, -27.03033008588991], [-46.67677669529661, -26.67677669529664]]]}, "2021-04-24T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-46.67677669529661, -25.32322330470336], [-46.53033008588989, -24.96966991411009], [-46.17677669529661, -24.82322330470336], [-46.14644660940672, -24.75], [-46.25, -24.5], [-46.03033008588989, -23.96966991411009], [-45.67677669529661, -23.82322330470336], [-45.53033008588989, -23.46966991411009], [-45.0, -23.25], [-44.46966991411011, -23.46966991411009], [-44.25, -24.0], [-44.46966991411011, -24.53033008588991], [-44.82322330470339, -24.67677669529664], [-44.85355339059328, -24.75], [-44.75, -25.0], [-44.85355339059328, -25.25], [-44.75, -25.5], [-44.96966991411011, -26.03033008588991], [-45.32322330470339, -26.17677669529664], [-45.46966991411011, -26.53033008588991], [-46.0, -26.75], [-46.25, -26.646446609406723], [-46.5, -26.75], [-47.03033008588989, -26.53033008588991], [-47.25, -26.0], [-47.03033008588989, -25.46966991411009], [-46.67677669529661, -25.32322330470336]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.132119171775173}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.062691875074964}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.41091655833867, 21.983663484333363, 22.28316565541337, 22.01447827749729, 22.194349676041043, 22.476417748196866]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.41091655833867, 20.37433867613123, 20.307777274803527, 19.815253827812, 20.171794109953737, 22.08506718946893]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8049270361086087, -2.1817924183826505, -1.9721068423672943, -2.2365012669136752, -2.0491739537890226, -1.517228962456183]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8049270361086087, -2.6052019392918737, -2.6654244083883896, -3.132119171775173, -2.794045921194652, -1.6912919228295777]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.299705050636143, -1.5909592321441477, -1.634538907174758, -1.8807743919704942, -1.7043943653437854, -1.2739351444336755]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.299705050636143, -1.8900377338322651, -2.05726436200887, -2.615920742223376, -2.1240750756076663, -1.359663090507596]}}