{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:11:44.884176", "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": "2020-Mar-03_to_2020-Mar-05_207.0_57.0"}, "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": 2020030000166}, "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 03 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 05 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 185037.66597938584}, "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": ["United States"]}, "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": ["Pacific 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": 57.0}, "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": 207.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "207.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 204.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 213.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[-156.646, 56.25], [-156.75, 56.5], [-156.646, 56.75], [-156.75, 57.0], [-156.53, 57.53], [-156.0, 57.75], [-155.75, 57.646], [-155.677, 57.677], [-155.646, 57.75], [-155.677, 57.823], [-156.03, 57.97], [-156.25, 58.5], [-156.03, 59.03], [-155.677, 59.177], [-155.646, 59.25], [-155.75, 59.5], [-155.53, 60.03], [-155.0, 60.25], [-154.75, 60.146], [-154.5, 60.25], [-154.25, 60.146], [-154.177, 60.177], [-154.146, 60.25], [-154.25, 60.5], [-154.03, 61.03], [-153.5, 61.25], [-152.97, 61.03], [-152.802, 60.625], [-152.5, 60.75], [-151.97, 60.53], [-151.75, 60.0], [-151.854, 59.75], [-151.823, 59.677], [-151.75, 59.646], [-151.5, 59.75], [-151.25, 59.646], [-151.0, 59.75], [-150.75, 59.646], [-150.677, 59.677], [-150.53, 60.03], [-150.0, 60.25], [-149.75, 60.146], [-149.5, 60.25], [-148.97, 60.03], [-148.823, 59.677], [-148.75, 59.646], [-148.5, 59.75], [-148.25, 59.646], [-148.0, 59.75], [-147.47, 59.53], [-147.323, 59.177], [-146.97, 59.03], [-146.823, 58.677], [-146.47, 58.53], [-146.25, 58.0], [-146.47, 57.47], [-147.0, 57.25], [-147.25, 57.354], [-147.5, 57.25], [-147.75, 57.354], [-148.0, 57.25], [-148.53, 57.47], [-148.677, 57.823], [-148.75, 57.854], [-149.0, 57.75], [-149.25, 57.854], [-149.323, 57.823], [-149.354, 57.75], [-149.323, 57.677], [-148.97, 57.53], [-148.823, 57.177], [-148.47, 57.03], [-148.25, 56.5], [-148.47, 55.97], [-149.0, 55.75], [-149.25, 55.854], [-149.323, 55.823], [-149.47, 55.47], [-150.0, 55.25], [-150.25, 55.354], [-150.5, 55.25], [-150.75, 55.354], [-151.0, 55.25], [-151.25, 55.354], [-151.5, 55.25], [-151.75, 55.354], [-152.0, 55.25], [-152.25, 55.354], [-152.5, 55.25], [-152.75, 55.354], [-153.0, 55.25], [-153.25, 55.354], [-153.5, 55.25], [-153.75, 55.354], [-153.823, 55.323], [-153.97, 54.97], [-154.5, 54.75], [-154.75, 54.854], [-155.0, 54.75], [-155.25, 54.854], [-155.5, 54.75], [-155.75, 54.854], [-156.0, 54.75], [-156.53, 54.97], [-156.75, 55.5], [-156.646, 55.75], [-156.75, 56.0], [-156.646, 56.25]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "N.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-03-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-156.64644660940672, 55.75], [-156.75, 56.0], [-156.64644660940672, 56.25], [-156.75, 56.5], [-156.64644660940672, 56.75], [-156.75, 57.0], [-156.53033008588991, 57.53033008588991], [-156.0, 57.75], [-155.75, 57.64644660940672], [-155.67677669529664, 57.67677669529664], [-155.64644660940672, 57.75], [-155.67677669529664, 57.82322330470336], [-156.03033008588991, 57.96966991411009], [-156.25, 58.5], [-156.03033008588991, 59.03033008588991], [-155.67677669529664, 59.17677669529664], [-155.64644660940672, 59.25], [-155.75, 59.5], [-155.53033008588991, 60.03033008588991], [-155.0, 60.25], [-154.75, 60.14644660940672], [-154.5, 60.25], [-154.25, 60.14644660940672], [-154.17677669529664, 60.17677669529664], [-154.14644660940672, 60.25], [-154.25, 60.5], [-154.03033008588991, 61.03033008588991], [-153.5, 61.25], [-152.96966991411009, 61.03033008588991], [-152.80177669529664, 60.625], [-152.5, 60.75], [-151.96966991411009, 60.53033008588991], [-151.75, 60.0], [-151.85355339059328, 59.75], [-151.82322330470336, 59.67677669529664], [-151.75, 59.64644660940672], [-151.5, 59.75], [-151.25, 59.64644660940672], [-151.0, 59.75], [-150.75, 59.64644660940672], [-150.67677669529664, 59.67677669529664], [-150.53033008588991, 60.03033008588991], [-150.0, 60.25], [-149.75, 60.14644660940672], [-149.5, 60.25], [-148.96966991411009, 60.03033008588991], [-148.82322330470336, 59.67677669529664], [-148.75, 59.64644660940672], [-148.5, 59.75], [-148.25, 59.64644660940672], [-148.0, 59.75], [-147.46966991411009, 59.53033008588991], [-147.32322330470336, 59.17677669529664], [-146.96966991411009, 59.03033008588991], [-146.82322330470336, 58.67677669529664], [-146.46966991411009, 58.53033008588991], [-146.25, 58.0], [-146.46966991411009, 57.46966991411009], [-147.0, 57.25], [-147.25, 57.35355339059328], [-147.5, 57.25], [-147.75, 57.35355339059328], [-148.0, 57.25], [-148.53033008588991, 57.46966991411009], [-148.67677669529664, 57.82322330470336], [-148.75, 57.85355339059328], [-149.0, 57.75], [-149.25, 57.85355339059328], [-149.32322330470336, 57.82322330470336], [-149.35355339059328, 57.75], [-149.32322330470336, 57.67677669529664], [-148.96966991411009, 57.53033008588991], [-148.82322330470336, 57.17677669529664], [-148.46966991411009, 57.03033008588991], [-148.25, 56.5], [-148.46966991411009, 55.96966991411009], [-149.0, 55.75], [-149.25, 55.85355339059328], [-149.32322330470336, 55.82322330470336], [-149.46966991411009, 55.46966991411009], [-150.0, 55.25], [-150.25, 55.35355339059328], [-150.5, 55.25], [-150.75, 55.35355339059328], [-151.0, 55.25], [-151.25, 55.35355339059328], [-151.5, 55.25], [-151.75, 55.35355339059328], [-152.0, 55.25], [-152.25, 55.35355339059328], [-152.5, 55.25], [-152.75, 55.35355339059328], [-153.0, 55.25], [-153.25, 55.35355339059328], [-153.5, 55.25], [-153.75, 55.35355339059328], [-153.82322330470336, 55.32322330470336], [-153.96966991411009, 54.96966991411009], [-154.5, 54.75], [-154.75, 54.85355339059328], [-155.0, 54.75], [-155.25, 54.85355339059328], [-155.5, 54.75], [-155.75, 54.85355339059328], [-156.0, 54.75], [-156.53033008588991, 54.96966991411009], [-156.75, 55.5], [-156.64644660940672, 55.75]]]}, "2020-03-04T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-156.64644660940672, 55.75], [-156.75, 56.0], [-156.64644660940672, 56.25], [-156.75, 56.5], [-156.64644660940672, 56.75], [-156.75, 57.0], [-156.53033008588991, 57.53033008588991], [-156.0, 57.75], [-155.75, 57.64644660940672], [-155.67677669529664, 57.67677669529664], [-155.64644660940672, 57.75], [-155.67677669529664, 57.82322330470336], [-156.03033008588991, 57.96966991411009], [-156.25, 58.5], [-156.03033008588991, 59.03033008588991], [-155.67677669529664, 59.17677669529664], [-155.64644660940672, 59.25], [-155.75, 59.5], [-155.53033008588991, 60.03033008588991], [-155.0, 60.25], [-154.75, 60.14644660940672], [-154.5, 60.25], [-154.25, 60.14644660940672], [-154.17677669529664, 60.17677669529664], [-154.14644660940672, 60.25], [-154.25, 60.5], [-154.03033008588991, 61.03033008588991], [-153.5, 61.25], [-152.96966991411009, 61.03033008588991], [-152.80177669529664, 60.625], [-152.5, 60.75], [-151.96966991411009, 60.53033008588991], [-151.75, 60.0], [-151.85355339059328, 59.75], [-151.82322330470336, 59.67677669529664], [-151.75, 59.64644660940672], [-151.5, 59.75], [-151.25, 59.64644660940672], [-151.0, 59.75], [-150.75, 59.64644660940672], [-150.67677669529664, 59.67677669529664], [-150.53033008588991, 60.03033008588991], [-150.0, 60.25], [-149.75, 60.14644660940672], [-149.5, 60.25], [-148.96966991411009, 60.03033008588991], [-148.82322330470336, 59.67677669529664], [-148.75, 59.64644660940672], [-148.5, 59.75], [-148.25, 59.64644660940672], [-148.0, 59.75], [-147.46966991411009, 59.53033008588991], [-147.32322330470336, 59.17677669529664], [-146.96966991411009, 59.03033008588991], [-146.82322330470336, 58.67677669529664], [-146.46966991411009, 58.53033008588991], [-146.25, 58.0], [-146.46966991411009, 57.46966991411009], [-147.0, 57.25], [-147.25, 57.35355339059328], [-147.5, 57.25], [-147.75, 57.35355339059328], [-148.0, 57.25], [-148.53033008588991, 57.46966991411009], [-148.67677669529664, 57.82322330470336], [-148.75, 57.85355339059328], [-149.0, 57.75], [-149.25, 57.85355339059328], [-149.32322330470336, 57.82322330470336], [-149.35355339059328, 57.75], [-149.32322330470336, 57.67677669529664], [-148.96966991411009, 57.53033008588991], [-148.82322330470336, 57.17677669529664], [-148.46966991411009, 57.03033008588991], [-148.25, 56.5], [-148.46966991411009, 55.96966991411009], [-149.0, 55.75], [-149.25, 55.85355339059328], [-149.32322330470336, 55.82322330470336], [-149.46966991411009, 55.46966991411009], [-150.0, 55.25], [-150.25, 55.35355339059328], [-150.5, 55.25], [-150.75, 55.35355339059328], [-151.0, 55.25], [-151.25, 55.35355339059328], [-151.5, 55.25], [-151.75, 55.35355339059328], [-152.0, 55.25], [-152.25, 55.35355339059328], [-152.5, 55.25], [-152.75, 55.35355339059328], [-153.0, 55.25], [-153.25, 55.35355339059328], [-153.5, 55.25], [-153.75, 55.35355339059328], [-153.82322330470336, 55.32322330470336], [-153.96966991411009, 54.96966991411009], [-154.5, 54.75], [-154.75, 54.85355339059328], [-155.0, 54.75], [-155.25, 54.85355339059328], [-155.5, 54.75], [-155.75, 54.85355339059328], [-156.0, 54.75], [-156.53033008588991, 54.96966991411009], [-156.75, 55.5], [-156.64644660940672, 55.75]]]}, "2020-03-05T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[-156.64644660940672, 55.75], [-156.75, 56.0], [-156.64644660940672, 56.25], [-156.75, 56.5], [-156.64644660940672, 56.75], [-156.75, 57.0], [-156.53033008588991, 57.53033008588991], [-156.0, 57.75], [-155.75, 57.64644660940672], [-155.67677669529664, 57.67677669529664], [-155.64644660940672, 57.75], [-155.67677669529664, 57.82322330470336], [-156.03033008588991, 57.96966991411009], [-156.25, 58.5], [-156.03033008588991, 59.03033008588991], [-155.67677669529664, 59.17677669529664], [-155.64644660940672, 59.25], [-155.75, 59.5], [-155.53033008588991, 60.03033008588991], [-155.0, 60.25], [-154.75, 60.14644660940672], [-154.5, 60.25], [-154.25, 60.14644660940672], [-154.17677669529664, 60.17677669529664], [-154.14644660940672, 60.25], [-154.25, 60.5], [-154.03033008588991, 61.03033008588991], [-153.5, 61.25], [-152.96966991411009, 61.03033008588991], [-152.80177669529664, 60.625], [-152.5, 60.75], [-151.96966991411009, 60.53033008588991], [-151.75, 60.0], [-151.85355339059328, 59.75], [-151.82322330470336, 59.67677669529664], [-151.75, 59.64644660940672], [-151.5, 59.75], [-151.25, 59.64644660940672], [-151.0, 59.75], [-150.75, 59.64644660940672], [-150.67677669529664, 59.67677669529664], [-150.53033008588991, 60.03033008588991], [-150.0, 60.25], [-149.75, 60.14644660940672], [-149.5, 60.25], [-148.96966991411009, 60.03033008588991], [-148.82322330470336, 59.67677669529664], [-148.75, 59.64644660940672], [-148.5, 59.75], [-148.25, 59.64644660940672], [-148.0, 59.75], [-147.46966991411009, 59.53033008588991], [-147.32322330470336, 59.17677669529664], [-146.96966991411009, 59.03033008588991], [-146.82322330470336, 58.67677669529664], [-146.46966991411009, 58.53033008588991], [-146.25, 58.0], [-146.46966991411009, 57.46966991411009], [-147.0, 57.25], [-147.25, 57.35355339059328], [-147.5, 57.25], [-147.75, 57.35355339059328], [-148.0, 57.25], [-148.53033008588991, 57.46966991411009], [-148.67677669529664, 57.82322330470336], [-148.75, 57.85355339059328], [-149.0, 57.75], [-149.25, 57.85355339059328], [-149.32322330470336, 57.82322330470336], [-149.35355339059328, 57.75], [-149.32322330470336, 57.67677669529664], [-148.96966991411009, 57.53033008588991], [-148.82322330470336, 57.17677669529664], [-148.46966991411009, 57.03033008588991], [-148.25, 56.5], [-148.46966991411009, 55.96966991411009], [-149.0, 55.75], [-149.25, 55.85355339059328], [-149.32322330470336, 55.82322330470336], [-149.46966991411009, 55.46966991411009], [-150.0, 55.25], [-150.25, 55.35355339059328], [-150.5, 55.25], [-150.75, 55.35355339059328], [-151.0, 55.25], [-151.25, 55.35355339059328], [-151.5, 55.25], [-151.75, 55.35355339059328], [-152.0, 55.25], [-152.25, 55.35355339059328], [-152.5, 55.25], [-152.75, 55.35355339059328], [-153.0, 55.25], [-153.25, 55.35355339059328], [-153.5, 55.25], [-153.75, 55.35355339059328], [-153.82322330470336, 55.32322330470336], [-153.96966991411009, 54.96966991411009], [-154.5, 54.75], [-154.75, 54.85355339059328], [-155.0, 54.75], [-155.25, 54.85355339059328], [-155.5, 54.75], [-155.75, 54.85355339059328], [-156.0, 54.75], [-156.53033008588991, 54.96966991411009], [-156.75, 55.5], [-156.64644660940672, 55.75]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.401165630632903}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.228889636662451}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-5.7680447499022875, -8.842199051551233, -5.98198224129942]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-21.96135780865302, -26.09214018976749, -22.21993480736674]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.052556431517688, -9.24966896982514, -6.384443508644519]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.597051402086151, -14.401165630632903, -12.026697347186115]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7539955241853036, -2.7953698650558465, -1.8829269075501334]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.173861979071953, -3.4722805117782607, -2.278602506027686]}}