{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:24:33.997213", "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-20_to_2021-May-24_289.0_21.5"}, "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": 2021050000905}, "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 20 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 24 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": 92390.65942083855}, "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": ["Bahamas", "Turks and Caicos Islands"]}, "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": ["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": 21.5}, "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": 289.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "289.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 284.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 291.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-76.25, 21.0], [-76.03, 21.53], [-75.5, 21.75], [-75.25, 21.646], [-75.0, 21.75], [-74.75, 21.646], [-74.5, 21.75], [-74.25, 21.646], [-74.0, 21.75], [-73.75, 21.646], [-73.677, 21.677], [-73.53, 22.03], [-73.0, 22.25], [-72.75, 22.146], [-72.5, 22.25], [-72.25, 22.146], [-72.0, 22.25], [-71.75, 22.146], [-71.5, 22.25], [-71.25, 22.146], [-71.0, 22.25], [-70.75, 22.146], [-70.5, 22.25], [-70.25, 22.146], [-70.0, 22.25], [-69.47, 22.03], [-69.323, 21.677], [-69.25, 21.646], [-69.0, 21.75], [-68.47, 21.53], [-68.25, 21.0], [-68.47, 20.47], [-69.0, 20.25], [-69.25, 20.354], [-69.323, 20.323], [-69.47, 19.97], [-70.0, 19.75], [-70.25, 19.854], [-70.5, 19.75], [-70.75, 19.854], [-71.0, 19.75], [-71.25, 19.854], [-71.5, 19.75], [-71.75, 19.854], [-71.823, 19.823], [-71.97, 19.47], [-72.5, 19.25], [-73.03, 19.47], [-73.177, 19.823], [-73.25, 19.854], [-73.5, 19.75], [-73.75, 19.854], [-74.0, 19.75], [-74.25, 19.854], [-74.5, 19.75], [-75.03, 19.97], [-75.177, 20.323], [-75.226, 20.344], [-75.25, 20.354], [-75.5, 20.25], [-76.03, 20.47], [-76.25, 21.0]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Caribbean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.46966991411011, 20.46966991411009], [-75.0, 20.25], [-75.53033008588989, 20.46966991411009], [-75.75, 21.0], [-75.53033008588989, 21.53033008588991], [-75.0, 21.75], [-74.46966991411011, 21.53033008588991], [-74.25, 21.0], [-74.46966991411011, 20.46966991411009]]], [[[-73.53033008588989, 20.96966991411009], [-73.75, 21.5], [-73.53033008588989, 22.03033008588991], [-73.0, 22.25], [-72.75, 22.146446609406723], [-72.5, 22.25], [-71.96966991411011, 22.03033008588991], [-71.75, 21.5], [-71.96966991411011, 20.96966991411009], [-72.5, 20.75], [-72.75, 20.853553390593277], [-73.0, 20.75], [-73.53033008588989, 20.96966991411009]]], [[[-71.0, 22.25], [-70.46966991411011, 22.03033008588991], [-70.25, 21.5], [-70.46966991411011, 20.96966991411009], [-71.0, 20.75], [-71.53033008588989, 20.96966991411009], [-71.75, 21.5], [-71.53033008588989, 22.03033008588991], [-71.0, 22.25]]]]}, "2021-05-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-75.25, 20.353553390593277], [-75.5, 20.25], [-76.03033008588989, 20.46966991411009], [-76.25, 21.0], [-76.03033008588989, 21.53033008588991], [-75.5, 21.75], [-75.25, 21.646446609406723], [-75.0, 21.75], [-74.75, 21.646446609406723], [-74.5, 21.75], [-74.25, 21.646446609406723], [-74.0, 21.75], [-73.75, 21.646446609406723], [-73.67677669529661, 21.67677669529664], [-73.53033008588989, 22.03033008588991], [-73.0, 22.25], [-72.75, 22.146446609406723], [-72.5, 22.25], [-72.25, 22.146446609406723], [-72.0, 22.25], [-71.75, 22.146446609406723], [-71.5, 22.25], [-71.25, 22.146446609406723], [-71.0, 22.25], [-70.75, 22.146446609406723], [-70.5, 22.25], [-70.25, 22.146446609406723], [-70.0, 22.25], [-69.46966991411011, 22.03033008588991], [-69.32322330470339, 21.67677669529664], [-69.25, 21.646446609406723], [-69.0, 21.75], [-68.46966991411011, 21.53033008588991], [-68.25, 21.0], [-68.46966991411011, 20.46966991411009], [-69.0, 20.25], [-69.25, 20.353553390593277], [-69.32322330470339, 20.32322330470336], [-69.46966991411011, 19.96966991411009], [-70.0, 19.75], [-70.25, 19.853553390593277], [-70.5, 19.75], [-70.75, 19.853553390593277], [-71.0, 19.75], [-71.25, 19.853553390593277], [-71.5, 19.75], [-71.75, 19.853553390593277], [-71.82322330470339, 19.82322330470336], [-71.96966991411011, 19.46966991411009], [-72.5, 19.25], [-73.03033008588989, 19.46966991411009], [-73.17677669529661, 19.82322330470336], [-73.25, 19.853553390593277], [-73.5, 19.75], [-73.75, 19.853553390593277], [-74.0, 19.75], [-74.25, 19.853553390593277], [-74.5, 19.75], [-75.03033008588989, 19.96966991411009], [-75.17677669529661, 20.32322330470336], [-75.25, 20.353553390593277]]]}, "2021-05-22T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-75.25, 20.353553390593277], [-75.5, 20.25], [-76.03033008588989, 20.46966991411009], [-76.25, 21.0], [-76.03033008588989, 21.53033008588991], [-75.5, 21.75], [-75.25, 21.646446609406723], [-75.0, 21.75], [-74.75, 21.646446609406723], [-74.5, 21.75], [-74.25, 21.646446609406723], [-74.0, 21.75], [-73.75, 21.646446609406723], [-73.67677669529661, 21.67677669529664], [-73.53033008588989, 22.03033008588991], [-73.0, 22.25], [-72.75, 22.146446609406723], [-72.5, 22.25], [-72.25, 22.146446609406723], [-72.0, 22.25], [-71.75, 22.146446609406723], [-71.5, 22.25], [-71.25, 22.146446609406723], [-71.0, 22.25], [-70.75, 22.146446609406723], [-70.5, 22.25], [-70.25, 22.146446609406723], [-70.0, 22.25], [-69.46966991411011, 22.03033008588991], [-69.32322330470339, 21.67677669529664], [-69.25, 21.646446609406723], [-69.0, 21.75], [-68.46966991411011, 21.53033008588991], [-68.25, 21.0], [-68.46966991411011, 20.46966991411009], [-69.0, 20.25], [-69.25, 20.353553390593277], [-69.32322330470339, 20.32322330470336], [-69.46966991411011, 19.96966991411009], [-70.0, 19.75], [-70.25, 19.853553390593277], [-70.5, 19.75], [-70.75, 19.853553390593277], [-71.0, 19.75], [-71.25, 19.853553390593277], [-71.5, 19.75], [-71.75, 19.853553390593277], [-71.82322330470339, 19.82322330470336], [-71.96966991411011, 19.46966991411009], [-72.5, 19.25], [-73.03033008588989, 19.46966991411009], [-73.17677669529661, 19.82322330470336], [-73.25, 19.853553390593277], [-73.5, 19.75], [-73.75, 19.853553390593277], [-74.0, 19.75], [-74.25, 19.853553390593277], [-74.5, 19.75], [-75.03033008588989, 19.96966991411009], [-75.17677669529661, 20.32322330470336], [-75.25, 20.353553390593277]]]}, "2021-05-23T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-75.25, 20.353553390593277], [-75.5, 20.25], [-76.03033008588989, 20.46966991411009], [-76.25, 21.0], [-76.03033008588989, 21.53033008588991], [-75.5, 21.75], [-75.25, 21.646446609406723], [-75.0, 21.75], [-74.75, 21.646446609406723], [-74.5, 21.75], [-74.25, 21.646446609406723], [-74.0, 21.75], [-73.75, 21.646446609406723], [-73.67677669529661, 21.67677669529664], [-73.53033008588989, 22.03033008588991], [-73.0, 22.25], [-72.75, 22.146446609406723], [-72.5, 22.25], [-72.25, 22.146446609406723], [-72.0, 22.25], [-71.75, 22.146446609406723], [-71.5, 22.25], [-71.25, 22.146446609406723], [-71.0, 22.25], [-70.75, 22.146446609406723], [-70.5, 22.25], [-70.25, 22.146446609406723], [-70.0, 22.25], [-69.46966991411011, 22.03033008588991], [-69.32322330470339, 21.67677669529664], [-69.25, 21.646446609406723], [-69.0, 21.75], [-68.46966991411011, 21.53033008588991], [-68.25, 21.0], [-68.46966991411011, 20.46966991411009], [-69.0, 20.25], [-69.25, 20.353553390593277], [-69.32322330470339, 20.32322330470336], [-69.46966991411011, 19.96966991411009], [-70.0, 19.75], [-70.25, 19.853553390593277], [-70.5, 19.75], [-70.75, 19.853553390593277], [-71.0, 19.75], [-71.25, 19.853553390593277], [-71.5, 19.75], [-71.75, 19.853553390593277], [-71.82322330470339, 19.82322330470336], [-71.96966991411011, 19.46966991411009], [-72.5, 19.25], [-73.03033008588989, 19.46966991411009], [-73.17677669529661, 19.82322330470336], [-73.25, 19.853553390593277], [-73.5, 19.75], [-73.75, 19.853553390593277], [-74.0, 19.75], [-74.25, 19.853553390593277], [-74.5, 19.75], [-75.03033008588989, 19.96966991411009], [-75.17677669529661, 20.32322330470336], [-75.25, 20.353553390593277]]]}, "2021-05-24T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-73.14644660940672, 21.25], [-73.25, 21.5], [-73.03033008588989, 22.03033008588991], [-72.5, 22.25], [-72.25, 22.146446609406723], [-72.0, 22.25], [-71.75, 22.146446609406723], [-71.5, 22.25], [-71.25, 22.146446609406723], [-71.0, 22.25], [-70.46966991411011, 22.03033008588991], [-70.25, 21.5], [-70.46966991411011, 20.96966991411009], [-70.82322330470339, 20.82322330470336], [-70.96966991411011, 20.46966991411009], [-71.5, 20.25], [-71.75, 20.353553390593277], [-72.0, 20.25], [-72.25, 20.353553390593277], [-72.5, 20.25], [-73.03033008588989, 20.46966991411009], [-73.25, 21.0], [-73.14644660940672, 21.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.1082356428871094}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.3777172071314197}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.244589093251193, 24.943010828658657, 24.554915915498214, 24.993856066952105, 25.311513423472945]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.11138239281007, 24.426250580540852, 23.96211349900358, 24.51628547083908, 25.094851922755367]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.9811535353649958, -1.2775473270375617, -1.7046972405169942, -1.285101932901398, -0.9908627152873432]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.0475006431958036, -1.607360880863098, -2.1082356428871094, -1.5576284081552103, -1.1264262912367258]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5260587109340298, -1.994265051693726, -2.650675264133952, -1.9817814366701012, -1.5600036344055108]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6255908234566057, -2.552475643786948, -3.2728023591217377, -2.4023151080015914, -1.7205336381296037]}}