{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:22:52.028302", "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-Mar-13_to_2021-Mar-21_298.5_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": 2021030000592}, "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": "March 13 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 21 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 83240.99618658975}, "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", "Guyana", "Suriname", "Venezuela, Bolivarian Republic of"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "America", "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": 298.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "298.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 298.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 302.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 3.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 6.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-60.47, 5.53], [-60.323, 5.177], [-60.25, 5.146], [-60.249, 5.146], [-60.0, 5.25], [-59.75, 5.146], [-59.5, 5.25], [-59.25, 5.146], [-59.0, 5.25], [-58.75, 5.146], [-58.5, 5.25], [-57.97, 5.03], [-57.823, 4.677], [-57.47, 4.53], [-57.25, 4.0], [-57.354, 3.75], [-57.25, 3.5], [-57.47, 2.97], [-58.0, 2.75], [-58.25, 2.854], [-58.274, 2.844], [-58.323, 2.823], [-58.47, 2.47], [-59.0, 2.25], [-59.25, 2.354], [-59.5, 2.25], [-59.75, 2.354], [-60.0, 2.25], [-60.25, 2.354], [-60.5, 2.25], [-61.03, 2.47], [-61.25, 3.0], [-61.146, 3.25], [-61.25, 3.5], [-61.146, 3.75], [-61.177, 3.823], [-61.5, 3.957], [-62.0, 3.75], [-62.53, 3.97], [-62.75, 4.5], [-62.53, 5.03], [-62.177, 5.177], [-62.146, 5.25], [-62.146, 5.251], [-62.25, 5.5], [-62.146, 5.75], [-62.25, 6.0], [-62.03, 6.53], [-61.5, 6.75], [-60.97, 6.53], [-60.75, 6.0], [-60.854, 5.751], [-60.854, 5.75], [-60.823, 5.677], [-60.47, 5.53]]]}}, "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": {"2021-03-13T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-61.19822330470333, 4.375000000000007], [-61.5, 4.25], [-62.03033008588989, 4.4696699141100895], [-62.25, 5.0], [-62.03033008588989, 5.5303300858899105], [-61.5, 5.75], [-60.96966991411011, 5.5303300858899105], [-60.80177669529667, 5.124999999999993], [-60.5, 5.25], [-60.25, 5.146446609406722], [-60.0, 5.25], [-59.75, 5.146446609406722], [-59.5, 5.25], [-59.25, 5.146446609406722], [-59.0, 5.25], [-58.75, 5.146446609406722], [-58.5, 5.25], [-57.96966991411011, 5.0303300858899105], [-57.82322330470339, 4.6767766952966365], [-57.46966991411011, 4.5303300858899105], [-57.25, 4.0], [-57.35355339059328, 3.75], [-57.25, 3.5], [-57.46966991411011, 2.9696699141100895], [-58.0, 2.75], [-58.25, 2.8535533905932784], [-58.32322330470339, 2.823223304703363], [-58.46966991411011, 2.4696699141100895], [-59.0, 2.25], [-59.25, 2.3535533905932784], [-59.5, 2.25], [-59.75, 2.3535533905932784], [-60.0, 2.25], [-60.25, 2.3535533905932784], [-60.5, 2.25], [-61.03033008588989, 2.4696699141100895], [-61.25, 3.0], [-61.14644660940672, 3.25], [-61.25, 3.5], [-61.14644660940672, 3.75], [-61.25, 4.0], [-61.14644660940672, 4.25], [-61.19822330470333, 4.375000000000007]]]}, "2021-03-14T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-61.19822330470333, 4.375000000000007], [-61.5, 4.25], [-62.03033008588989, 4.4696699141100895], [-62.25, 5.0], [-62.03033008588989, 5.5303300858899105], [-61.5, 5.75], [-60.96966991411011, 5.5303300858899105], [-60.80177669529667, 5.124999999999993], [-60.5, 5.25], [-60.25, 5.146446609406722], [-60.0, 5.25], [-59.75, 5.146446609406722], [-59.5, 5.25], [-59.25, 5.146446609406722], [-59.0, 5.25], [-58.75, 5.146446609406722], [-58.5, 5.25], [-57.96966991411011, 5.0303300858899105], [-57.82322330470339, 4.6767766952966365], [-57.46966991411011, 4.5303300858899105], [-57.25, 4.0], [-57.35355339059328, 3.75], [-57.25, 3.5], [-57.46966991411011, 2.9696699141100895], [-58.0, 2.75], [-58.25, 2.8535533905932784], [-58.32322330470339, 2.823223304703363], [-58.46966991411011, 2.4696699141100895], [-59.0, 2.25], [-59.25, 2.3535533905932784], [-59.5, 2.25], [-59.75, 2.3535533905932784], [-60.0, 2.25], [-60.25, 2.3535533905932784], [-60.5, 2.25], [-61.03033008588989, 2.4696699141100895], [-61.25, 3.0], [-61.14644660940672, 3.25], [-61.25, 3.5], [-61.14644660940672, 3.75], [-61.25, 4.0], [-61.14644660940672, 4.25], [-61.19822330470333, 4.375000000000007]]]}, "2021-03-15T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-62.17677669529661, 5.1767766952966365], [-62.03033008588989, 5.5303300858899105], [-61.5, 5.75], [-60.96966991411011, 5.5303300858899105], [-60.80177669529667, 5.124999999999993], [-60.5, 5.25], [-60.25, 5.146446609406722], [-60.0, 5.25], [-59.75, 5.146446609406722], [-59.5, 5.25], [-59.25, 5.146446609406722], [-59.0, 5.25], [-58.75, 5.146446609406722], [-58.5, 5.25], [-57.96966991411011, 5.0303300858899105], [-57.82322330470339, 4.6767766952966365], [-57.46966991411011, 4.5303300858899105], [-57.25, 4.0], [-57.35355339059328, 3.75], [-57.25, 3.5], [-57.46966991411011, 2.9696699141100895], [-58.0, 2.75], [-58.25, 2.8535533905932784], [-58.32322330470339, 2.823223304703363], [-58.46966991411011, 2.4696699141100895], [-59.0, 2.25], [-59.25, 2.3535533905932784], [-59.5, 2.25], [-59.75, 2.3535533905932784], [-60.0, 2.25], [-60.25, 2.3535533905932784], [-60.5, 2.25], [-61.03033008588989, 2.4696699141100895], [-61.25, 3.0], [-61.14644660940672, 3.25], [-61.25, 3.5], [-61.14644660940672, 3.75], [-61.25, 4.0], [-61.14644660940672, 4.25], [-61.19822330470333, 4.375000000000007], [-61.32322330470339, 4.3232233047033635], [-61.46966991411011, 3.9696699141100895], [-62.0, 3.75], [-62.53033008588989, 3.9696699141100895], [-62.75, 4.5], [-62.53033008588989, 5.0303300858899105], [-62.17677669529661, 5.1767766952966365]]]}, "2021-03-16T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-62.17677669529661, 5.1767766952966365], [-62.03033008588989, 5.5303300858899105], [-61.5, 5.75], [-61.25, 5.646446609406722], [-61.0, 5.75], [-60.46966991411011, 5.5303300858899105], [-60.32322330470339, 5.1767766952966365], [-60.25, 5.146446609406722], [-60.0, 5.25], [-59.75, 5.146446609406722], [-59.5, 5.25], [-59.25, 5.146446609406722], [-59.0, 5.25], [-58.46966991411011, 5.0303300858899105], [-58.25, 4.5], [-58.35355339059328, 4.25], [-58.32322330470339, 4.1767766952966365], [-57.96966991411011, 4.0303300858899105], [-57.75, 3.5], [-57.96966991411011, 2.9696699141100895], [-58.5, 2.75], [-58.75, 2.8535533905932784], [-58.82322330470339, 2.823223304703363], [-58.96966991411011, 2.4696699141100895], [-59.5, 2.25], [-59.75, 2.3535533905932784], [-60.0, 2.25], [-60.25, 2.3535533905932784], [-60.5, 2.25], [-61.03033008588989, 2.4696699141100895], [-61.25, 3.0], [-61.14644660940672, 3.25], [-61.25, 3.5], [-61.14644660940672, 3.75], [-61.17677669529661, 3.823223304703363], [-61.5, 3.9571067811865572], [-62.0, 3.75], [-62.53033008588989, 3.9696699141100895], [-62.75, 4.5], [-62.53033008588989, 5.0303300858899105], [-62.17677669529661, 5.1767766952966365]]]}, "2021-03-17T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-62.17677669529661, 5.1767766952966365], [-62.03033008588989, 5.5303300858899105], [-61.5, 5.75], [-61.25, 5.646446609406722], [-61.0, 5.75], [-60.46966991411011, 5.5303300858899105], [-60.32322330470339, 5.1767766952966365], [-59.96966991411011, 5.0303300858899105], [-59.82322330470339, 4.6767766952966365], [-59.46966991411011, 4.5303300858899105], [-59.25, 4.0], [-59.35355339059328, 3.75], [-59.25, 3.5], [-59.46966991411011, 2.9696699141100895], [-60.0, 2.75], [-60.25, 2.8535533905932784], [-60.5, 2.75], [-61.03033008588989, 2.9696699141100895], [-61.25, 3.5], [-61.14644660940672, 3.75], [-61.17677669529661, 3.823223304703363], [-61.5, 3.9571067811865572], [-62.0, 3.75], [-62.53033008588989, 3.9696699141100895], [-62.75, 4.5], [-62.53033008588989, 5.0303300858899105], [-62.17677669529661, 5.1767766952966365]]]}, "2021-03-18T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-62.14644660940672, 5.25], [-62.25, 5.5], [-62.03033008588989, 6.0303300858899105], [-61.5, 6.25], [-60.96966991411011, 6.0303300858899105], [-60.82322330470339, 5.6767766952966365], [-60.46966991411011, 5.5303300858899105], [-60.32322330470339, 5.1767766952966365], [-59.96966991411011, 5.0303300858899105], [-59.75, 4.5], [-59.96966991411011, 3.9696699141100895], [-60.5, 3.75], [-60.75, 3.8535533905932784], [-61.0, 3.75], [-61.53033008588989, 3.9696699141100895], [-61.67677669529661, 4.3232233047033635], [-62.03033008588989, 4.4696699141100895], [-62.25, 5.0], [-62.14644660940672, 5.25]]]}, "2021-03-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-62.14644660940672, 5.25], [-62.25, 5.5], [-62.14644660940672, 5.75], [-62.25, 6.0], [-62.03033008588989, 6.5303300858899105], [-61.5, 6.75], [-60.96966991411011, 6.5303300858899105], [-60.75, 6.0], [-60.85355339059328, 5.75], [-60.82322330470339, 5.6767766952966365], [-60.46966991411011, 5.5303300858899105], [-60.32322330470339, 5.1767766952966365], [-59.96966991411011, 5.0303300858899105], [-59.75, 4.5], [-59.96966991411011, 3.9696699141100895], [-60.5, 3.75], [-61.03033008588989, 3.9696699141100895], [-61.17677669529661, 4.3232233047033635], [-61.25, 4.353553390593278], [-61.5, 4.25], [-62.03033008588989, 4.4696699141100895], [-62.25, 5.0], [-62.14644660940672, 5.25]]]}, "2021-03-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-62.14644660940672, 5.25], [-62.25, 5.5], [-62.14644660940672, 5.75], [-62.25, 6.0], [-62.03033008588989, 6.5303300858899105], [-61.5, 6.75], [-60.96966991411011, 6.5303300858899105], [-60.75, 6.0], [-60.85355339059328, 5.75], [-60.82322330470339, 5.6767766952966365], [-60.46966991411011, 5.5303300858899105], [-60.32322330470339, 5.1767766952966365], [-59.96966991411011, 5.0303300858899105], [-59.75, 4.5], [-59.96966991411011, 3.9696699141100895], [-60.5, 3.75], [-61.03033008588989, 3.9696699141100895], [-61.17677669529661, 4.3232233047033635], [-61.25, 4.353553390593278], [-61.5, 4.25], [-62.03033008588989, 4.4696699141100895], [-62.25, 5.0], [-62.14644660940672, 5.25]]]}, "2021-03-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-61.625, 5.301776695296634], [-62.03033008588989, 5.4696699141100895], [-62.25, 6.0], [-62.03033008588989, 6.5303300858899105], [-61.5, 6.75], [-60.96966991411011, 6.5303300858899105], [-60.75, 6.0], [-60.875, 5.698223304703366], [-60.46966991411011, 5.5303300858899105], [-60.25, 5.0], [-60.46966991411011, 4.4696699141100895], [-61.0, 4.25], [-61.53033008588989, 4.4696699141100895], [-61.75, 5.0], [-61.625, 5.301776695296634]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.917867228448131}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9139720167086252}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.79163390311919, 24.83708550398495, 24.94441588669082, 24.844189077006774, 24.89215760948889, 21.9473115961855, 21.800836128335504, 21.54252485449581, 21.15560811988371]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.702713118436293, 21.648087223374716, 21.817784411737478, 20.751443005789383, 20.76023153386035, 19.199660463952057, 19.355853328693513, 18.94786556214541, 21.12927826139463]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9044141336927627, -1.9186031398939902, -1.7497597238525733, -1.7151348421066075, -1.5192828861440324, -1.3889891597391966, -1.1386900726065847, -1.4090300138961538, -1.1340975859593811]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.917867228448131, -3.1488907721525266, -2.3891824809070386, -2.890603357749967, -2.2051017118948835, -1.6238473953746961, -1.3870453046255307, -1.5434887075397228, -1.157057831718646]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.7088928396067895, -1.788672298031296, -1.7320466296472719, -1.6974136792644998, -1.4372058851399472, -1.5511257374155256, -1.319426833086936, -1.626672399402711, -1.293412352785688]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.4177837175400603, -2.5964042165081818, -2.4221405170994617, -2.237078881733785, -1.716562156834653, -2.0134495831556656, -1.5526203754153298, -1.9090440462796516, -1.3765723629388076]}}