{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:23:39.363292", "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-22_to_2021-Apr-27_303.5_5.0"}, "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": 2021040000978}, "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 22 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 27 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": 80088.8931044777}, "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", "Suriname"]}, "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": 5.0}, "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": 303.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "303.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 301.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 304.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 4.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 5.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-59.75, 5.5], [-59.53, 6.03], [-59.0, 6.25], [-58.75, 6.146], [-58.5, 6.25], [-58.25, 6.146], [-58.0, 6.25], [-57.75, 6.146], [-57.5, 6.25], [-57.25, 6.146], [-57.0, 6.25], [-56.47, 6.03], [-56.323, 5.677], [-56.274, 5.656], [-56.25, 5.646], [-56.0, 5.75], [-55.75, 5.646], [-55.5, 5.75], [-54.97, 5.53], [-54.75, 5.0], [-54.854, 4.75], [-54.75, 4.5], [-54.97, 3.97], [-55.323, 3.823], [-55.47, 3.47], [-56.0, 3.25], [-56.25, 3.354], [-56.5, 3.25], [-56.75, 3.354], [-57.0, 3.25], [-57.25, 3.354], [-57.5, 3.25], [-57.75, 3.354], [-58.0, 3.25], [-58.53, 3.47], [-58.677, 3.823], [-58.75, 3.854], [-59.0, 3.75], [-59.53, 3.97], [-59.75, 4.5], [-59.646, 4.75], [-59.75, 5.0], [-59.646, 5.25], [-59.75, 5.5]]]}}, "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": {"2021-04-22T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-57.25, 5.0], [-57.03033008588989, 5.5303300858899105], [-56.5, 5.75], [-55.96966991411011, 5.5303300858899105], [-55.75, 5.0], [-55.96966991411011, 4.4696699141100895], [-56.5, 4.25], [-57.03033008588989, 4.4696699141100895], [-57.25, 5.0]]]}, "2021-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.46966991411011, 4.4696699141100895], [-59.0, 4.25], [-59.53033008588989, 4.4696699141100895], [-59.75, 5.0], [-59.53033008588989, 5.5303300858899105], [-59.0, 5.75], [-58.46966991411011, 5.5303300858899105], [-58.25, 5.0], [-58.46966991411011, 4.4696699141100895]]], [[[-58.03033008588989, 5.5303300858899105], [-57.5, 5.75], [-57.0, 5.542893218813443], [-56.5, 5.75], [-55.96966991411011, 5.5303300858899105], [-55.75, 5.0], [-55.96966991411011, 4.4696699141100895], [-56.5, 4.25], [-57.0, 4.457106781186557], [-57.5, 4.25], [-58.03033008588989, 4.4696699141100895], [-58.25, 5.0], [-58.03033008588989, 5.5303300858899105]]]]}, "2021-04-24T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-59.64644660940672, 4.75], [-59.75, 5.0], [-59.64644660940672, 5.25], [-59.75, 5.5], [-59.53033008588989, 6.0303300858899105], [-59.0, 6.25], [-58.75, 6.146446609406722], [-58.5, 6.25], [-58.25, 6.146446609406722], [-58.0, 6.25], [-57.75, 6.146446609406722], [-57.5, 6.25], [-57.25, 6.146446609406722], [-57.0, 6.25], [-56.46966991411011, 6.0303300858899105], [-56.32322330470339, 5.6767766952966365], [-56.25, 5.646446609406722], [-56.0, 5.75], [-55.75, 5.646446609406722], [-55.5, 5.75], [-54.96966991411011, 5.5303300858899105], [-54.75, 5.0], [-54.96966991411011, 4.4696699141100895], [-55.32322330470339, 4.3232233047033635], [-55.46966991411011, 3.9696699141100895], [-55.82322330470339, 3.823223304703363], [-55.96966991411011, 3.4696699141100895], [-56.5, 3.25], [-56.75, 3.3535533905932784], [-57.0, 3.25], [-57.25, 3.3535533905932784], [-57.5, 3.25], [-57.75, 3.3535533905932784], [-58.0, 3.25], [-58.53033008588989, 3.4696699141100895], [-58.67677669529661, 3.823223304703363], [-58.75, 3.8535533905932784], [-59.0, 3.75], [-59.53033008588989, 3.9696699141100895], [-59.75, 4.5], [-59.64644660940672, 4.75]]]}, "2021-04-25T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-59.64644660940672, 4.75], [-59.75, 5.0], [-59.64644660940672, 5.25], [-59.75, 5.5], [-59.53033008588989, 6.0303300858899105], [-59.0, 6.25], [-58.75, 6.146446609406722], [-58.5, 6.25], [-58.25, 6.146446609406722], [-58.0, 6.25], [-57.75, 6.146446609406722], [-57.5, 6.25], [-57.25, 6.146446609406722], [-57.0, 6.25], [-56.46966991411011, 6.0303300858899105], [-56.32322330470339, 5.6767766952966365], [-56.25, 5.646446609406722], [-56.0, 5.75], [-55.75, 5.646446609406722], [-55.5, 5.75], [-54.96966991411011, 5.5303300858899105], [-54.75, 5.0], [-54.85355339059328, 4.75], [-54.75, 4.5], [-54.96966991411011, 3.9696699141100895], [-55.32322330470339, 3.823223304703363], [-55.46966991411011, 3.4696699141100895], [-56.0, 3.25], [-56.25, 3.3535533905932784], [-56.5, 3.25], [-56.75, 3.3535533905932784], [-57.0, 3.25], [-57.25, 3.3535533905932784], [-57.5, 3.25], [-57.75, 3.3535533905932784], [-58.0, 3.25], [-58.53033008588989, 3.4696699141100895], [-58.67677669529661, 3.823223304703363], [-58.75, 3.8535533905932784], [-59.0, 3.75], [-59.53033008588989, 3.9696699141100895], [-59.75, 4.5], [-59.64644660940672, 4.75]]]}, "2021-04-26T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-59.64644660940672, 4.75], [-59.75, 5.0], [-59.64644660940672, 5.25], [-59.75, 5.5], [-59.53033008588989, 6.0303300858899105], [-59.0, 6.25], [-58.75, 6.146446609406722], [-58.5, 6.25], [-58.25, 6.146446609406722], [-58.0, 6.25], [-57.75, 6.146446609406722], [-57.5, 6.25], [-57.25, 6.146446609406722], [-57.0, 6.25], [-56.46966991411011, 6.0303300858899105], [-56.32322330470339, 5.6767766952966365], [-56.25, 5.646446609406722], [-56.0, 5.75], [-55.75, 5.646446609406722], [-55.5, 5.75], [-54.96966991411011, 5.5303300858899105], [-54.75, 5.0], [-54.85355339059328, 4.75], [-54.75, 4.5], [-54.96966991411011, 3.9696699141100895], [-55.32322330470339, 3.823223304703363], [-55.46966991411011, 3.4696699141100895], [-56.0, 3.25], [-56.25, 3.3535533905932784], [-56.5, 3.25], [-56.75, 3.3535533905932784], [-57.0, 3.25], [-57.25, 3.3535533905932784], [-57.5, 3.25], [-57.75, 3.3535533905932784], [-58.0, 3.25], [-58.53033008588989, 3.4696699141100895], [-58.67677669529661, 3.823223304703363], [-58.75, 3.8535533905932784], [-59.0, 3.75], [-59.53033008588989, 3.9696699141100895], [-59.75, 4.5], [-59.64644660940672, 4.75]]]}, "2021-04-27T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-59.64644660940672, 4.75], [-59.75, 5.0], [-59.64644660940672, 5.25], [-59.75, 5.5], [-59.53033008588989, 6.0303300858899105], [-59.0, 6.25], [-58.75, 6.146446609406722], [-58.5, 6.25], [-58.25, 6.146446609406722], [-58.0, 6.25], [-57.75, 6.146446609406722], [-57.5, 6.25], [-57.25, 6.146446609406722], [-57.0, 6.25], [-56.46966991411011, 6.0303300858899105], [-56.32322330470339, 5.6767766952966365], [-56.25, 5.646446609406722], [-56.0, 5.75], [-55.75, 5.646446609406722], [-55.5, 5.75], [-54.96966991411011, 5.5303300858899105], [-54.75, 5.0], [-54.85355339059328, 4.75], [-54.75, 4.5], [-54.96966991411011, 3.9696699141100895], [-55.32322330470339, 3.823223304703363], [-55.46966991411011, 3.4696699141100895], [-56.0, 3.25], [-56.25, 3.3535533905932784], [-56.5, 3.25], [-56.75, 3.3535533905932784], [-57.0, 3.25], [-57.25, 3.3535533905932784], [-57.5, 3.25], [-57.75, 3.3535533905932784], [-58.0, 3.25], [-58.53033008588989, 3.4696699141100895], [-58.67677669529661, 3.823223304703363], [-58.75, 3.8535533905932784], [-59.0, 3.75], [-59.53033008588989, 3.9696699141100895], [-59.75, 4.5], [-59.64644660940672, 4.75]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.405358562396259}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6474230381116635}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.914661163222092, 24.876136465202364, 24.28390298249161, 24.421882008175885, 24.420829442462036, 23.963064450823197]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.914661163222092, 24.44417023583395, 23.855476773451244, 23.408409893220323, 23.805845624029132, 23.302112649520325]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2484463368814431, -1.0779047289664352, -1.6592028225400313, -1.5145943872974674, -1.5311440875406608, -1.9667159011270576]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.2484463368814431, -1.114089487687579, -2.112702899634769, -2.136007784878302, -2.1121664710753976, -2.405358562396259]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4499621121273838, -1.2371782637207616, -1.9794003086785177, -1.8427103919504608, -1.9070495791204014, -2.429377815912817]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4499621121273838, -1.30509690549245, -2.633745844923351, -2.607514845281373, -2.651726677815254, -2.857007285147412]}}