{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:24:23.184023", "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-May-01_to_2021-May-06_321.0_-11.5"}, "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": 2021050000086}, "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": "May 01 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 06 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": 136221.202301425}, "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": -11.5}, "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": 321.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "321.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 318.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 322.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -14.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -9.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-41.0, -9.75], [-40.75, -9.854], [-40.677, -9.823], [-40.53, -9.47], [-40.177, -9.323], [-40.03, -8.97], [-39.5, -8.75], [-38.97, -8.97], [-38.823, -9.323], [-38.75, -9.354], [-38.5, -9.25], [-37.97, -9.47], [-37.75, -10.0], [-37.854, -10.25], [-37.823, -10.323], [-37.47, -10.47], [-37.25, -11.0], [-37.354, -11.25], [-37.25, -11.5], [-37.354, -11.75], [-37.25, -12.0], [-37.354, -12.25], [-37.25, -12.5], [-37.47, -13.03], [-37.823, -13.177], [-37.854, -13.25], [-37.75, -13.5], [-37.97, -14.03], [-38.323, -14.177], [-38.47, -14.53], [-39.0, -14.75], [-39.53, -14.53], [-39.698, -14.125], [-40.0, -14.25], [-40.53, -14.03], [-40.677, -13.677], [-41.03, -13.53], [-41.25, -13.0], [-41.146, -12.75], [-41.25, -12.5], [-41.146, -12.25], [-41.25, -12.0], [-41.146, -11.75], [-41.177, -11.677], [-41.25, -11.646], [-41.251, -11.646], [-41.5, -11.75], [-42.03, -11.53], [-42.25, -11.0], [-42.03, -10.47], [-41.677, -10.323], [-41.53, -9.97], [-41.0, -9.75]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-05-01T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-41.67677669529661, -10.323223304703363], [-41.53033008588989, -9.969669914110089], [-41.0, -9.75], [-40.75, -9.853553390593278], [-40.67677669529661, -9.823223304703363], [-40.53033008588989, -9.469669914110089], [-40.17677669529661, -9.323223304703363], [-40.03033008588989, -8.969669914110089], [-39.5, -8.75], [-38.96966991411011, -8.969669914110089], [-38.82322330470339, -9.323223304703363], [-38.75, -9.353553390593278], [-38.5, -9.25], [-37.96966991411011, -9.469669914110089], [-37.75, -10.0], [-37.85355339059328, -10.25], [-37.75, -10.5], [-37.96966991411011, -11.030330085889911], [-38.5, -11.25], [-38.92677669529667, -11.073223304703344], [-38.82322330470339, -11.323223304703363], [-38.46966991411011, -11.469669914110089], [-38.25, -12.0], [-38.35355339059328, -12.25], [-38.25, -12.5], [-38.35355339059328, -12.75], [-38.25, -13.0], [-38.35355339059328, -13.25], [-38.25, -13.5], [-38.35355339059328, -13.75], [-38.25, -14.0], [-38.46966991411011, -14.530330085889911], [-39.0, -14.75], [-39.53033008588989, -14.530330085889911], [-39.69822330470333, -14.124999999999993], [-40.0, -14.25], [-40.53033008588989, -14.030330085889911], [-40.67677669529661, -13.676776695296637], [-41.03033008588989, -13.530330085889911], [-41.25, -13.0], [-41.14644660940672, -12.75], [-41.25, -12.5], [-41.14644660940672, -12.25], [-41.25, -12.0], [-41.14644660940672, -11.75], [-41.17677669529661, -11.676776695296637], [-41.25, -11.646446609406722], [-41.5, -11.75], [-42.03033008588989, -11.530330085889911], [-42.25, -11.0], [-42.03033008588989, -10.469669914110089], [-41.67677669529661, -10.323223304703363]], [[-39.32322330470339, -10.823223304703363], [-39.07322330470333, -10.926776695296656], [-39.17677669529661, -10.676776695296637], [-39.25, -10.646446609406722], [-39.375, -10.698223304703365], [-39.32322330470339, -10.823223304703363]]]}, "2021-05-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-41.67677669529661, -10.323223304703363], [-41.53033008588989, -9.969669914110089], [-41.0, -9.75], [-40.75, -9.853553390593278], [-40.67677669529661, -9.823223304703363], [-40.53033008588989, -9.469669914110089], [-40.17677669529661, -9.323223304703363], [-40.03033008588989, -8.969669914110089], [-39.5, -8.75], [-38.96966991411011, -8.969669914110089], [-38.82322330470339, -9.323223304703363], [-38.75, -9.353553390593278], [-38.5, -9.25], [-37.96966991411011, -9.469669914110089], [-37.75, -10.0], [-37.85355339059328, -10.25], [-37.75, -10.5], [-37.95710678118655, -11.0], [-37.75, -11.5], [-37.85355339059328, -11.75], [-37.75, -12.0], [-37.85355339059328, -12.25], [-37.75, -12.5], [-37.96966991411011, -13.030330085889911], [-38.32322330470339, -13.176776695296637], [-38.35355339059328, -13.25], [-38.25, -13.5], [-38.35355339059328, -13.75], [-38.25, -14.0], [-38.46966991411011, -14.530330085889911], [-39.0, -14.75], [-39.53033008588989, -14.530330085889911], [-39.69822330470333, -14.124999999999993], [-40.0, -14.25], [-40.53033008588989, -14.030330085889911], [-40.67677669529661, -13.676776695296637], [-41.03033008588989, -13.530330085889911], [-41.25, -13.0], [-41.14644660940672, -12.75], [-41.25, -12.5], [-41.14644660940672, -12.25], [-41.25, -12.0], [-41.14644660940672, -11.75], [-41.17677669529661, -11.676776695296637], [-41.25, -11.646446609406722], [-41.5, -11.75], [-42.03033008588989, -11.530330085889911], [-42.25, -11.0], [-42.03033008588989, -10.469669914110089], [-41.67677669529661, -10.323223304703363]]]}, "2021-05-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-41.67677669529661, -10.323223304703363], [-41.53033008588989, -9.969669914110089], [-41.0, -9.75], [-40.75, -9.853553390593278], [-40.67677669529661, -9.823223304703363], [-40.53033008588989, -9.469669914110089], [-40.17677669529661, -9.323223304703363], [-40.03033008588989, -8.969669914110089], [-39.5, -8.75], [-38.96966991411011, -8.969669914110089], [-38.82322330470339, -9.323223304703363], [-38.75, -9.353553390593278], [-38.5, -9.25], [-37.96966991411011, -9.469669914110089], [-37.75, -10.0], [-37.85355339059328, -10.25], [-37.82322330470339, -10.323223304703363], [-37.46966991411011, -10.469669914110089], [-37.25, -11.0], [-37.35355339059328, -11.25], [-37.25, -11.5], [-37.35355339059328, -11.75], [-37.25, -12.0], [-37.35355339059328, -12.25], [-37.25, -12.5], [-37.46966991411011, -13.030330085889911], [-37.82322330470339, -13.176776695296637], [-37.85355339059328, -13.25], [-37.75, -13.5], [-37.96966991411011, -14.030330085889911], [-38.32322330470339, -14.176776695296637], [-38.46966991411011, -14.530330085889911], [-39.0, -14.75], [-39.53033008588989, -14.530330085889911], [-39.69822330470333, -14.124999999999993], [-40.0, -14.25], [-40.53033008588989, -14.030330085889911], [-40.67677669529661, -13.676776695296637], [-41.03033008588989, -13.530330085889911], [-41.25, -13.0], [-41.14644660940672, -12.75], [-41.25, -12.5], [-41.14644660940672, -12.25], [-41.25, -12.0], [-41.14644660940672, -11.75], [-41.17677669529661, -11.676776695296637], [-41.25, -11.646446609406722], [-41.5, -11.75], [-42.03033008588989, -11.530330085889911], [-42.25, -11.0], [-42.03033008588989, -10.469669914110089], [-41.67677669529661, -10.323223304703363]]]}, "2021-05-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-41.64644660940672, -10.75], [-41.75, -10.5], [-41.53033008588989, -9.969669914110089], [-41.0, -9.75], [-40.75, -9.853553390593278], [-40.67677669529661, -9.823223304703363], [-40.53033008588989, -9.469669914110089], [-40.0, -9.25], [-39.75, -9.353553390593278], [-39.5, -9.25], [-39.25, -9.353553390593278], [-39.0, -9.25], [-38.75, -9.353553390593278], [-38.5, -9.25], [-37.96966991411011, -9.469669914110089], [-37.75, -10.0], [-37.85355339059328, -10.25], [-37.82322330470339, -10.323223304703363], [-37.46966991411011, -10.469669914110089], [-37.25, -11.0], [-37.35355339059328, -11.25], [-37.25, -11.5], [-37.35355339059328, -11.75], [-37.25, -12.0], [-37.35355339059328, -12.25], [-37.25, -12.5], [-37.46966991411011, -13.030330085889911], [-37.82322330470339, -13.176776695296637], [-37.85355339059328, -13.25], [-37.75, -13.5], [-37.96966991411011, -14.030330085889911], [-38.32322330470339, -14.176776695296637], [-38.46966991411011, -14.530330085889911], [-39.0, -14.75], [-39.53033008588989, -14.530330085889911], [-39.75, -14.0], [-39.64644660940672, -13.75], [-39.75, -13.5], [-39.64644660940672, -13.25], [-39.75, -13.0], [-39.64644660940672, -12.75], [-39.67677669529661, -12.676776695296637], [-39.75, -12.646446609406722], [-40.0, -12.75], [-40.25, -12.646446609406722], [-40.5, -12.75], [-41.03033008588989, -12.530330085889911], [-41.25, -12.0], [-41.14644660940672, -11.75], [-41.17677669529661, -11.676776695296637], [-41.53033008588989, -11.530330085889911], [-41.75, -11.0], [-41.64644660940672, -10.75]]]}, "2021-05-05T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-41.64644660940672, -10.75], [-41.75, -10.5], [-41.53033008588989, -9.969669914110089], [-41.0, -9.75], [-40.75, -9.853553390593278], [-40.67677669529661, -9.823223304703363], [-40.53033008588989, -9.469669914110089], [-40.0, -9.25], [-39.75, -9.353553390593278], [-39.5, -9.25], [-39.25, -9.353553390593278], [-39.0, -9.25], [-38.75, -9.353553390593278], [-38.5, -9.25], [-37.96966991411011, -9.469669914110089], [-37.75, -10.0], [-37.85355339059328, -10.25], [-37.82322330470339, -10.323223304703363], [-37.46966991411011, -10.469669914110089], [-37.25, -11.0], [-37.35355339059328, -11.25], [-37.25, -11.5], [-37.35355339059328, -11.75], [-37.25, -12.0], [-37.35355339059328, -12.25], [-37.25, -12.5], [-37.46966991411011, -13.030330085889911], [-37.82322330470339, -13.176776695296637], [-37.85355339059328, -13.25], [-37.75, -13.5], [-37.96966991411011, -14.030330085889911], [-38.5, -14.25], [-39.03033008588989, -14.030330085889911], [-39.25, -13.5], [-39.14644660940672, -13.25], [-39.25, -13.0], [-39.14644660940672, -12.75], [-39.17677669529661, -12.676776695296637], [-39.25, -12.646446609406722], [-39.5, -12.75], [-39.75, -12.646446609406722], [-40.0, -12.75], [-40.25, -12.646446609406722], [-40.5, -12.75], [-41.03033008588989, -12.530330085889911], [-41.25, -12.0], [-41.14644660940672, -11.75], [-41.17677669529661, -11.676776695296637], [-41.53033008588989, -11.530330085889911], [-41.75, -11.0], [-41.64644660940672, -10.75]]]}, "2021-05-06T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-39.64644660940672, -11.25], [-39.75, -11.0], [-39.53033008588989, -10.469669914110089], [-39.0, -10.25], [-38.75, -10.353553390593278], [-38.5, -10.25], [-37.96966991411011, -10.469669914110089], [-37.82322330470339, -10.823223304703363], [-37.46966991411011, -10.969669914110089], [-37.25, -11.5], [-37.35355339059328, -11.75], [-37.25, -12.0], [-37.35355339059328, -12.25], [-37.25, -12.5], [-37.46966991411011, -13.030330085889911], [-38.0, -13.25], [-38.25, -13.146446609406722], [-38.5, -13.25], [-39.03033008588989, -13.030330085889911], [-39.25, -12.5], [-39.14644660940672, -12.25], [-39.17677669529661, -12.176776695296637], [-39.53033008588989, -12.030330085889911], [-39.75, -11.5], [-39.64644660940672, -11.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.8264426291300424}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7681376770946793}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.728626093883804, 22.767069055966715, 23.08784065466358, 23.151862381049796, 23.094414584463095, 24.15413086852851]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.612673994598197, 20.221653301615106, 20.346915747029925, 21.13411919963727, 20.81987977859643, 23.533444707583953]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8562562658948285, -1.9244925260675365, -1.7205305487675597, -1.723935591476799, -1.7616716727050405, -1.2674990939021376]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.3257712586378148, -2.8264426291300424, -2.463780154913195, -2.4591976353573273, -2.389105494645321, -1.4914200644777225]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.585046363183277, -1.5996975570101883, -1.5214350953001718, -1.632795017368151, -1.6277395886658932, -1.3754533115671919]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9034403010766843, -2.039091766492928, -1.8571994273213632, -2.559664370132575, -1.998953056709177, -1.6854727575214767]}}