{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:25:58.877730", "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-Jul-01_to_2021-Jul-05_297.5_8.0"}, "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": 2021070000078}, "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": "July 01 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 05 2021"}, "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": 85933.61480860614}, "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": ["Guyana", "Venezuela, Bolivarian Republic of"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 8.0}, "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": 297.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "297.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 296.0}, "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": 5.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 8.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-64.53, 4.97], [-64.75, 5.5], [-64.646, 5.75], [-64.75, 6.0], [-64.646, 6.25], [-64.75, 6.5], [-64.646, 6.75], [-64.75, 7.0], [-64.646, 7.25], [-64.75, 7.5], [-64.53, 8.03], [-64.177, 8.177], [-64.03, 8.53], [-63.5, 8.75], [-63.25, 8.646], [-63.0, 8.75], [-62.75, 8.646], [-62.5, 8.75], [-62.25, 8.646], [-62.0, 8.75], [-61.47, 8.53], [-61.25, 8.0], [-61.354, 7.75], [-61.302, 7.625], [-61.0, 7.75], [-60.47, 7.53], [-60.25, 7.0], [-60.354, 6.75], [-60.25, 6.5], [-60.354, 6.25], [-60.25, 6.0], [-60.47, 5.47], [-61.0, 5.25], [-61.25, 5.354], [-61.5, 5.25], [-61.75, 5.354], [-62.0, 5.25], [-62.53, 5.47], [-62.677, 5.823], [-62.749, 5.854], [-62.75, 5.854], [-62.823, 5.823], [-62.854, 5.75], [-62.854, 5.749], [-62.75, 5.5], [-62.97, 4.97], [-63.5, 4.75], [-63.75, 4.854], [-64.0, 4.75], [-64.53, 4.97]]]}}, "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": {"2021-07-01T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-64.64644660940672, 6.75], [-64.75, 7.0], [-64.64644660940672, 7.25], [-64.75, 7.5], [-64.53033008588989, 8.030330085889911], [-64.17677669529661, 8.176776695296637], [-64.03033008588989, 8.530330085889911], [-63.5, 8.75], [-63.25, 8.646446609406722], [-63.0, 8.75], [-62.75, 8.646446609406722], [-62.5, 8.75], [-62.25, 8.646446609406722], [-62.0, 8.75], [-61.46966991411011, 8.530330085889911], [-61.25, 8.0], [-61.35355339059328, 7.75], [-61.30177669529667, 7.624999999999993], [-61.0, 7.75], [-60.46966991411011, 7.5303300858899105], [-60.25, 7.0], [-60.35355339059328, 6.75], [-60.25, 6.5], [-60.46966991411011, 5.9696699141100895], [-60.82322330470339, 5.8232233047033635], [-60.96966991411011, 5.4696699141100895], [-61.5, 5.25], [-61.75, 5.353553390593278], [-62.0, 5.25], [-62.53033008588989, 5.4696699141100895], [-62.67677669529661, 5.8232233047033635], [-62.75, 5.853553390593278], [-62.82322330470339, 5.8232233047033635], [-62.96966991411011, 5.4696699141100895], [-63.5, 5.25], [-64.03033008588989, 5.4696699141100895], [-64.17677669529661, 5.8232233047033635], [-64.53033008588989, 5.9696699141100895], [-64.75, 6.5], [-64.64644660940672, 6.75]]]}, "2021-07-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-64.64644660940672, 5.75], [-64.75, 6.0], [-64.64644660940672, 6.25], [-64.75, 6.5], [-64.64644660940672, 6.75], [-64.75, 7.0], [-64.64644660940672, 7.25], [-64.75, 7.5], [-64.53033008588989, 8.030330085889911], [-64.17677669529661, 8.176776695296637], [-64.03033008588989, 8.530330085889911], [-63.5, 8.75], [-63.25, 8.646446609406722], [-63.0, 8.75], [-62.75, 8.646446609406722], [-62.5, 8.75], [-62.25, 8.646446609406722], [-62.0, 8.75], [-61.46966991411011, 8.530330085889911], [-61.25, 8.0], [-61.35355339059328, 7.75], [-61.30177669529667, 7.624999999999993], [-61.0, 7.75], [-60.46966991411011, 7.5303300858899105], [-60.25, 7.0], [-60.35355339059328, 6.75], [-60.25, 6.5], [-60.35355339059328, 6.25], [-60.25, 6.0], [-60.46966991411011, 5.4696699141100895], [-61.0, 5.25], [-61.25, 5.353553390593278], [-61.5, 5.25], [-61.75, 5.353553390593278], [-62.0, 5.25], [-62.53033008588989, 5.4696699141100895], [-62.67677669529661, 5.8232233047033635], [-62.75, 5.853553390593278], [-62.82322330470339, 5.8232233047033635], [-62.85355339059328, 5.75], [-62.75, 5.5], [-62.96966991411011, 4.9696699141100895], [-63.5, 4.75], [-63.75, 4.853553390593278], [-64.0, 4.75], [-64.53033008588989, 4.9696699141100895], [-64.75, 5.5], [-64.64644660940672, 5.75]]]}, "2021-07-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-64.64644660940672, 5.75], [-64.75, 6.0], [-64.64644660940672, 6.25], [-64.75, 6.5], [-64.64644660940672, 6.75], [-64.75, 7.0], [-64.64644660940672, 7.25], [-64.75, 7.5], [-64.53033008588989, 8.030330085889911], [-64.17677669529661, 8.176776695296637], [-64.03033008588989, 8.530330085889911], [-63.5, 8.75], [-63.25, 8.646446609406722], [-63.0, 8.75], [-62.75, 8.646446609406722], [-62.5, 8.75], [-62.25, 8.646446609406722], [-62.0, 8.75], [-61.46966991411011, 8.530330085889911], [-61.25, 8.0], [-61.35355339059328, 7.75], [-61.30177669529667, 7.624999999999993], [-61.0, 7.75], [-60.46966991411011, 7.5303300858899105], [-60.25, 7.0], [-60.35355339059328, 6.75], [-60.25, 6.5], [-60.35355339059328, 6.25], [-60.25, 6.0], [-60.46966991411011, 5.4696699141100895], [-61.0, 5.25], [-61.25, 5.353553390593278], [-61.5, 5.25], [-61.75, 5.353553390593278], [-62.0, 5.25], [-62.53033008588989, 5.4696699141100895], [-62.67677669529661, 5.8232233047033635], [-62.75, 5.853553390593278], [-62.82322330470339, 5.8232233047033635], [-62.85355339059328, 5.75], [-62.75, 5.5], [-62.96966991411011, 4.9696699141100895], [-63.5, 4.75], [-63.75, 4.853553390593278], [-64.0, 4.75], [-64.53033008588989, 4.9696699141100895], [-64.75, 5.5], [-64.64644660940672, 5.75]]]}, "2021-07-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-64.64644660940672, 5.75], [-64.75, 6.0], [-64.64644660940672, 6.25], [-64.75, 6.5], [-64.64644660940672, 6.75], [-64.75, 7.0], [-64.53033008588989, 7.5303300858899105], [-64.17677669529661, 7.6767766952966365], [-64.03033008588989, 8.030330085889911], [-63.67677669529661, 8.176776695296637], [-63.53033008588989, 8.530330085889911], [-63.0, 8.75], [-62.75, 8.646446609406722], [-62.5, 8.75], [-62.25, 8.646446609406722], [-62.0, 8.75], [-61.46966991411011, 8.530330085889911], [-61.25, 8.0], [-61.35355339059328, 7.75], [-61.30177669529667, 7.624999999999993], [-61.0, 7.75], [-60.46966991411011, 7.5303300858899105], [-60.25, 7.0], [-60.35355339059328, 6.75], [-60.25, 6.5], [-60.35355339059328, 6.25], [-60.25, 6.0], [-60.46966991411011, 5.4696699141100895], [-61.0, 5.25], [-61.25, 5.353553390593278], [-61.5, 5.25], [-62.03033008588989, 5.4696699141100895], [-62.25, 6.0], [-62.14644660940672, 6.25], [-62.17677669529661, 6.3232233047033635], [-62.30177669529667, 6.375000000000007], [-62.46966991411011, 5.9696699141100895], [-62.82322330470339, 5.8232233047033635], [-62.85355339059328, 5.75], [-62.75, 5.5], [-62.96966991411011, 4.9696699141100895], [-63.5, 4.75], [-63.75, 4.853553390593278], [-64.0, 4.75], [-64.53033008588989, 4.9696699141100895], [-64.75, 5.5], [-64.64644660940672, 5.75]]]}, "2021-07-05T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-64.75, 5.5], [-64.53033008588989, 6.0303300858899105], [-64.0, 6.25], [-63.46966991411011, 6.0303300858899105], [-63.25, 5.5], [-63.46966991411011, 4.9696699141100895], [-64.0, 4.75], [-64.53033008588989, 4.9696699141100895], [-64.75, 5.5]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.3485443976720717}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.3424893630172736}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.485208766068297, 22.690472232449054, 23.31711701969749, 23.493817342559453, 22.6087438875619]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.151822628358673, 20.67766850048173, 20.904529521309314, 21.00352784383631, 22.6087438875619]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2426934010111357, -1.8309354714024917, -1.1924933714986423, -1.0339696608339155, -1.048422626934041]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.9069344411553857, -2.3485443976720717, -1.572593467785623, -1.4210371706478782, -1.048422626934041]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7790559528917032, -2.7016055454765295, -1.764078388955314, -1.5425257090932625, -1.464735519105968]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.64579192511856, -3.2854647276592757, -2.281552823653915, -2.018505669581638, -1.464735519105968]}}