{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:22:28.974138", "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-Feb-28_to_2021-Mar-03_302.5_-6.0"}, "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": 2021020001082}, "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": "February 28 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 03 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 70603.06837802278}, "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": []}, "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": -6.0}, "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": 302.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "302.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 299.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 303.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -8.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -5.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-59.0, -8.75], [-59.53, -8.53], [-59.677, -8.177], [-60.03, -8.03], [-60.177, -7.677], [-60.53, -7.53], [-60.677, -7.177], [-61.03, -7.03], [-61.25, -6.5], [-61.03, -5.97], [-60.5, -5.75], [-59.97, -5.97], [-59.823, -6.323], [-59.573, -6.427], [-59.75, -6.0], [-59.646, -5.75], [-59.75, -5.5], [-59.53, -4.97], [-59.0, -4.75], [-58.75, -4.854], [-58.677, -4.823], [-58.53, -4.47], [-58.0, -4.25], [-57.47, -4.47], [-57.323, -4.823], [-56.97, -4.97], [-56.75, -5.5], [-56.854, -5.75], [-56.75, -6.0], [-56.854, -6.25], [-56.75, -6.5], [-56.854, -6.75], [-56.823, -6.823], [-56.47, -6.97], [-56.25, -7.5], [-56.354, -7.75], [-56.25, -8.0], [-56.47, -8.53], [-57.0, -8.75], [-57.25, -8.646], [-57.5, -8.75], [-57.75, -8.646], [-58.0, -8.75], [-58.25, -8.646], [-58.5, -8.75], [-58.75, -8.646], [-59.0, -8.75]], [[-58.927, -7.073], [-58.823, -7.323], [-58.75, -7.354], [-58.5, -7.25], [-58.927, -7.073]], [[-58.25, -7.354], [-58.177, -7.323], [-58.146, -7.25], [-58.177, -7.177], [-58.25, -7.146], [-58.5, -7.25], [-58.25, -7.354]], [[-59.323, -6.823], [-59.073, -6.927], [-59.177, -6.677], [-59.427, -6.573], [-59.323, -6.823]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.South-America", "South-American-Monsoon"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-57.96966991411011, -8.530330085889911], [-58.5, -8.75], [-59.03033008588989, -8.530330085889911], [-59.25, -8.0], [-59.03033008588989, -7.4696699141100895], [-58.5, -7.25], [-57.96966991411011, -7.4696699141100895], [-57.75, -8.0], [-57.96966991411011, -8.530330085889911]]], [[[-57.75, -7.5], [-57.53033008588989, -6.9696699141100895], [-57.0, -6.75], [-56.46966991411011, -6.9696699141100895], [-56.25, -7.5], [-56.35355339059328, -7.75], [-56.25, -8.0], [-56.46966991411011, -8.530330085889911], [-57.0, -8.75], [-57.53033008588989, -8.530330085889911], [-57.75, -8.0], [-57.64644660940672, -7.75], [-57.75, -7.5]]], [[[-58.75, -5.0], [-58.53033008588989, -4.4696699141100895], [-58.0, -4.25], [-57.46966991411011, -4.4696699141100895], [-57.25, -5.0], [-57.375, -5.301776695296634], [-56.96966991411011, -5.4696699141100895], [-56.75, -6.0], [-56.96966991411011, -6.5303300858899105], [-57.5, -6.75], [-58.03033008588989, -6.5303300858899105], [-58.25, -6.0], [-58.125, -5.698223304703366], [-58.53033008588989, -5.5303300858899105], [-58.75, -5.0]]]]}, "2021-03-01T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-60.67677669529661, -7.1767766952966365], [-61.03033008588989, -7.0303300858899105], [-61.25, -6.5], [-61.03033008588989, -5.9696699141100895], [-60.5, -5.75], [-59.96966991411011, -5.9696699141100895], [-59.82322330470339, -6.3232233047033635], [-59.57322330470333, -6.426776695296656], [-59.75, -6.0], [-59.64644660940672, -5.75], [-59.75, -5.5], [-59.53033008588989, -4.9696699141100895], [-59.0, -4.75], [-58.75, -4.853553390593278], [-58.67677669529661, -4.8232233047033635], [-58.53033008588989, -4.4696699141100895], [-58.0, -4.25], [-57.46966991411011, -4.4696699141100895], [-57.32322330470339, -4.8232233047033635], [-56.96966991411011, -4.9696699141100895], [-56.75, -5.5], [-56.85355339059328, -5.75], [-56.75, -6.0], [-56.85355339059328, -6.25], [-56.75, -6.5], [-56.85355339059328, -6.75], [-56.82322330470339, -6.8232233047033635], [-56.46966991411011, -6.9696699141100895], [-56.25, -7.5], [-56.35355339059328, -7.75], [-56.25, -8.0], [-56.46966991411011, -8.530330085889911], [-57.0, -8.75], [-57.25, -8.646446609406722], [-57.5, -8.75], [-57.75, -8.646446609406722], [-58.0, -8.75], [-58.25, -8.646446609406722], [-58.5, -8.75], [-58.75, -8.646446609406722], [-59.0, -8.75], [-59.53033008588989, -8.530330085889911], [-59.67677669529661, -8.176776695296637], [-60.03033008588989, -8.030330085889911], [-60.17677669529661, -7.6767766952966365], [-60.53033008588989, -7.5303300858899105], [-60.67677669529661, -7.1767766952966365]], [[-58.75, -7.353553390593278], [-58.5, -7.25], [-58.92677669529667, -7.073223304703344], [-58.82322330470339, -7.3232233047033635], [-58.75, -7.353553390593278]], [[-58.5, -7.25], [-58.25, -7.353553390593278], [-58.17677669529661, -7.3232233047033635], [-58.14644660940672, -7.25], [-58.17677669529661, -7.1767766952966365], [-58.25, -7.146446609406722], [-58.5, -7.25]], [[-59.32322330470339, -6.8232233047033635], [-59.07322330470333, -6.926776695296656], [-59.17677669529661, -6.6767766952966365], [-59.42677669529667, -6.573223304703344], [-59.32322330470339, -6.8232233047033635]]]}, "2021-03-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-60.67677669529661, -7.1767766952966365], [-61.03033008588989, -7.0303300858899105], [-61.25, -6.5], [-61.03033008588989, -5.9696699141100895], [-60.5, -5.75], [-59.96966991411011, -5.9696699141100895], [-59.82322330470339, -6.3232233047033635], [-59.57322330470333, -6.426776695296656], [-59.75, -6.0], [-59.64644660940672, -5.75], [-59.75, -5.5], [-59.53033008588989, -4.9696699141100895], [-59.0, -4.75], [-58.75, -4.853553390593278], [-58.67677669529661, -4.8232233047033635], [-58.53033008588989, -4.4696699141100895], [-58.0, -4.25], [-57.46966991411011, -4.4696699141100895], [-57.32322330470339, -4.8232233047033635], [-56.96966991411011, -4.9696699141100895], [-56.75, -5.5], [-56.85355339059328, -5.75], [-56.75, -6.0], [-56.85355339059328, -6.25], [-56.75, -6.5], [-56.85355339059328, -6.75], [-56.82322330470339, -6.8232233047033635], [-56.46966991411011, -6.9696699141100895], [-56.25, -7.5], [-56.35355339059328, -7.75], [-56.25, -8.0], [-56.46966991411011, -8.530330085889911], [-57.0, -8.75], [-57.25, -8.646446609406722], [-57.5, -8.75], [-57.75, -8.646446609406722], [-58.0, -8.75], [-58.25, -8.646446609406722], [-58.5, -8.75], [-58.75, -8.646446609406722], [-59.0, -8.75], [-59.53033008588989, -8.530330085889911], [-59.67677669529661, -8.176776695296637], [-60.03033008588989, -8.030330085889911], [-60.17677669529661, -7.6767766952966365], [-60.53033008588989, -7.5303300858899105], [-60.67677669529661, -7.1767766952966365]], [[-58.75, -7.353553390593278], [-58.5, -7.25], [-58.92677669529667, -7.073223304703344], [-58.82322330470339, -7.3232233047033635], [-58.75, -7.353553390593278]], [[-58.5, -7.25], [-58.25, -7.353553390593278], [-58.17677669529661, -7.3232233047033635], [-58.14644660940672, -7.25], [-58.17677669529661, -7.1767766952966365], [-58.25, -7.146446609406722], [-58.5, -7.25]], [[-59.32322330470339, -6.8232233047033635], [-59.07322330470333, -6.926776695296656], [-59.17677669529661, -6.6767766952966365], [-59.42677669529667, -6.573223304703344], [-59.32322330470339, -6.8232233047033635]]]}, "2021-03-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-60.67677669529661, -7.1767766952966365], [-61.03033008588989, -7.0303300858899105], [-61.25, -6.5], [-61.03033008588989, -5.9696699141100895], [-60.5, -5.75], [-59.96966991411011, -5.9696699141100895], [-59.82322330470339, -6.3232233047033635], [-59.57322330470333, -6.426776695296656], [-59.75, -6.0], [-59.64644660940672, -5.75], [-59.75, -5.5], [-59.53033008588989, -4.9696699141100895], [-59.0, -4.75], [-58.75, -4.853553390593278], [-58.67677669529661, -4.8232233047033635], [-58.53033008588989, -4.4696699141100895], [-58.0, -4.25], [-57.46966991411011, -4.4696699141100895], [-57.32322330470339, -4.8232233047033635], [-56.96966991411011, -4.9696699141100895], [-56.75, -5.5], [-56.85355339059328, -5.75], [-56.75, -6.0], [-56.85355339059328, -6.25], [-56.75, -6.5], [-56.85355339059328, -6.75], [-56.82322330470339, -6.8232233047033635], [-56.46966991411011, -6.9696699141100895], [-56.25, -7.5], [-56.46966991411011, -8.030330085889911], [-56.82322330470339, -8.176776695296637], [-56.96966991411011, -8.530330085889911], [-57.5, -8.75], [-57.75, -8.646446609406722], [-58.0, -8.75], [-58.25, -8.646446609406722], [-58.5, -8.75], [-58.75, -8.646446609406722], [-59.0, -8.75], [-59.53033008588989, -8.530330085889911], [-59.67677669529661, -8.176776695296637], [-60.03033008588989, -8.030330085889911], [-60.17677669529661, -7.6767766952966365], [-60.53033008588989, -7.5303300858899105], [-60.67677669529661, -7.1767766952966365]], [[-58.75, -7.353553390593278], [-58.5, -7.25], [-58.92677669529667, -7.073223304703344], [-58.82322330470339, -7.3232233047033635], [-58.75, -7.353553390593278]], [[-58.5, -7.25], [-58.25, -7.353553390593278], [-58.17677669529661, -7.3232233047033635], [-58.14644660940672, -7.25], [-58.17677669529661, -7.1767766952966365], [-58.25, -7.146446609406722], [-58.5, -7.25]], [[-59.32322330470339, -6.8232233047033635], [-59.07322330470333, -6.926776695296656], [-59.17677669529661, -6.6767766952966365], [-59.42677669529667, -6.573223304703344], [-59.32322330470339, -6.8232233047033635]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.351545735261368}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5402166547381482}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.026531768580412, 24.180733493580192, 23.84569765516619, 23.75358925499512]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.367519776240556, 23.106911431713, 23.015882287302873, 23.15964260013908]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.203020442618731, -1.307291649474972, -1.6494164275706986, -1.7462012641245792]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.2542365227677692, -1.8500282347633288, -1.8909376043788484, -2.351545735261368]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3386728460191937, -1.5187481971536507, -1.8604125506407383, -1.9530916067653932]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4521552320881934, -2.1734678508692555, -2.2224975399064526, -2.5773676247853072]}}