{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:25:22.100440", "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-Jun-29_to_2021-Jul-03_89.5_25.5"}, "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": 2021060001374}, "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": "June 29 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 03 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": 138835.52610977934}, "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": ["Bangladesh", "Bhutan", "India", "Nepal"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia", "Asia", "Asia"]}, "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": 25.5}, "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": 89.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "89.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 85.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 93.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[84.47, 26.97], [84.25, 27.5], [84.47, 28.03], [85.0, 28.25], [85.25, 28.146], [85.5, 28.25], [86.03, 28.03], [86.177, 27.677], [86.25, 27.646], [86.5, 27.75], [86.75, 27.646], [87.0, 27.75], [87.25, 27.646], [87.5, 27.75], [87.75, 27.646], [88.0, 27.75], [88.25, 27.646], [88.5, 27.75], [88.75, 27.646], [89.0, 27.75], [89.25, 27.646], [89.5, 27.75], [89.75, 27.646], [90.0, 27.75], [90.25, 27.646], [90.5, 27.75], [90.75, 27.646], [91.0, 27.75], [91.53, 27.53], [91.75, 27.0], [91.646, 26.75], [91.75, 26.5], [91.625, 26.198], [92.03, 26.03], [92.177, 25.677], [92.25, 25.646], [92.5, 25.75], [92.75, 25.646], [93.0, 25.75], [93.53, 25.53], [93.75, 25.0], [93.53, 24.47], [93.177, 24.323], [93.146, 24.25], [93.25, 24.0], [93.03, 23.47], [92.5, 23.25], [92.25, 23.354], [92.0, 23.25], [91.47, 23.47], [91.25, 24.0], [91.354, 24.25], [91.302, 24.375], [91.0, 24.25], [90.75, 24.354], [90.5, 24.25], [90.25, 24.354], [90.0, 24.25], [89.75, 24.354], [89.5, 24.25], [89.25, 24.354], [89.0, 24.25], [88.47, 24.47], [88.25, 25.0], [88.354, 25.25], [88.323, 25.323], [87.97, 25.47], [87.823, 25.823], [87.75, 25.854], [87.677, 25.823], [87.53, 25.47], [87.0, 25.25], [86.75, 25.354], [86.5, 25.25], [85.97, 25.47], [85.823, 25.823], [85.47, 25.97], [85.323, 26.323], [84.97, 26.47], [84.823, 26.823], [84.47, 26.97]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-06-29T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[88.35355339059328, 25.25], [88.25, 25.5], [88.35355339059328, 25.75], [88.25, 26.0], [88.46966991411009, 26.53033008588991], [89.0, 26.75], [89.25, 26.646446609406727], [89.5, 26.75], [89.75, 26.646446609406727], [90.0, 26.75], [90.25, 26.646446609406727], [90.5, 26.75], [91.03033008588991, 26.53033008588991], [91.17677669529664, 26.17677669529664], [91.53033008588991, 26.03033008588991], [91.75, 25.5], [91.53033008588991, 24.96966991411009], [91.0, 24.75], [90.75, 24.853553390593273], [90.67677669529664, 24.82322330470336], [90.53033008588991, 24.46966991411009], [90.0, 24.25], [89.75, 24.353553390593273], [89.5, 24.25], [89.25, 24.353553390593273], [89.0, 24.25], [88.46966991411009, 24.46966991411009], [88.25, 25.0], [88.35355339059328, 25.25]]]}, "2021-06-30T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[85.32322330470336, 26.32322330470336], [84.96966991411009, 26.46966991411009], [84.75, 27.0], [84.96966991411009, 27.53033008588991], [85.5, 27.75], [85.75, 27.646446609406727], [86.0, 27.75], [86.25, 27.646446609406727], [86.5, 27.75], [86.75, 27.646446609406727], [87.0, 27.75], [87.25, 27.646446609406727], [87.5, 27.75], [87.75, 27.646446609406727], [88.0, 27.75], [88.25, 27.646446609406727], [88.5, 27.75], [88.75, 27.646446609406727], [89.0, 27.75], [89.25, 27.646446609406727], [89.5, 27.75], [89.75, 27.646446609406727], [90.0, 27.75], [90.25, 27.646446609406727], [90.5, 27.75], [90.75, 27.646446609406727], [91.0, 27.75], [91.53033008588991, 27.53033008588991], [91.75, 27.0], [91.64644660940672, 26.75], [91.75, 26.5], [91.625, 26.19822330470336], [92.03033008588991, 26.03033008588991], [92.17677669529664, 25.67677669529664], [92.25, 25.646446609406727], [92.5, 25.75], [92.75, 25.646446609406727], [93.0, 25.75], [93.53033008588991, 25.53033008588991], [93.75, 25.0], [93.53033008588991, 24.46966991411009], [93.17677669529664, 24.32322330470336], [93.14644660940672, 24.25], [93.25, 24.0], [93.03033008588991, 23.46966991411009], [92.5, 23.25], [92.25, 23.353553390593273], [92.0, 23.25], [91.46966991411009, 23.46966991411009], [91.25, 24.0], [91.35355339059328, 24.25], [91.25, 24.5], [91.35355339059328, 24.75], [91.32322330470336, 24.82322330470336], [91.25, 24.853553390593273], [91.0, 24.75], [90.75, 24.853553390593273], [90.67677669529664, 24.82322330470336], [90.53033008588991, 24.46966991411009], [90.0, 24.25], [89.75, 24.353553390593273], [89.5, 24.25], [89.25, 24.353553390593273], [89.0, 24.25], [88.46966991411009, 24.46966991411009], [88.25, 25.0], [88.35355339059328, 25.25], [88.32322330470336, 25.32322330470336], [87.96966991411009, 25.46966991411009], [87.82322330470336, 25.82322330470336], [87.75, 25.853553390593273], [87.67677669529664, 25.82322330470336], [87.53033008588991, 25.46966991411009], [87.0, 25.25], [86.75, 25.353553390593273], [86.5, 25.25], [85.96966991411009, 25.46966991411009], [85.82322330470336, 25.82322330470336], [85.46966991411009, 25.96966991411009], [85.32322330470336, 26.32322330470336]]]}, "2021-07-01T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[84.82322330470336, 26.82322330470336], [84.46966991411009, 26.96966991411009], [84.25, 27.5], [84.46966991411009, 28.03033008588991], [85.0, 28.25], [85.25, 28.146446609406727], [85.5, 28.25], [86.03033008588991, 28.03033008588991], [86.17677669529664, 27.67677669529664], [86.25, 27.646446609406727], [86.5, 27.75], [86.75, 27.646446609406727], [87.0, 27.75], [87.25, 27.646446609406727], [87.5, 27.75], [87.75, 27.646446609406727], [88.0, 27.75], [88.25, 27.646446609406727], [88.5, 27.75], [88.75, 27.646446609406727], [89.0, 27.75], [89.25, 27.646446609406727], [89.5, 27.75], [89.75, 27.646446609406727], [90.0, 27.75], [90.25, 27.646446609406727], [90.5, 27.75], [90.75, 27.646446609406727], [91.0, 27.75], [91.53033008588991, 27.53033008588991], [91.75, 27.0], [91.64644660940672, 26.75], [91.75, 26.5], [91.625, 26.19822330470336], [92.03033008588991, 26.03033008588991], [92.17677669529664, 25.67677669529664], [92.25, 25.646446609406727], [92.5, 25.75], [92.75, 25.646446609406727], [93.0, 25.75], [93.53033008588991, 25.53033008588991], [93.75, 25.0], [93.53033008588991, 24.46966991411009], [93.17677669529664, 24.32322330470336], [93.14644660940672, 24.25], [93.25, 24.0], [93.03033008588991, 23.46966991411009], [92.5, 23.25], [92.25, 23.353553390593273], [92.0, 23.25], [91.46966991411009, 23.46966991411009], [91.25, 24.0], [91.35355339059328, 24.25], [91.30177669529664, 24.375], [91.0, 24.25], [90.75, 24.353553390593273], [90.5, 24.25], [90.25, 24.353553390593273], [90.0, 24.25], [89.75, 24.353553390593273], [89.5, 24.25], [89.25, 24.353553390593273], [89.0, 24.25], [88.46966991411009, 24.46966991411009], [88.25, 25.0], [88.35355339059328, 25.25], [88.32322330470336, 25.32322330470336], [87.96966991411009, 25.46966991411009], [87.82322330470336, 25.82322330470336], [87.75, 25.853553390593273], [87.67677669529664, 25.82322330470336], [87.53033008588991, 25.46966991411009], [87.0, 25.25], [86.75, 25.353553390593273], [86.5, 25.25], [85.96966991411009, 25.46966991411009], [85.82322330470336, 25.82322330470336], [85.46966991411009, 25.96966991411009], [85.32322330470336, 26.32322330470336], [84.96966991411009, 26.46966991411009], [84.82322330470336, 26.82322330470336]]]}, "2021-07-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[84.82322330470336, 26.82322330470336], [84.46966991411009, 26.96966991411009], [84.25, 27.5], [84.46966991411009, 28.03033008588991], [85.0, 28.25], [85.25, 28.146446609406727], [85.5, 28.25], [86.03033008588991, 28.03033008588991], [86.17677669529664, 27.67677669529664], [86.25, 27.646446609406727], [86.5, 27.75], [86.75, 27.646446609406727], [87.0, 27.75], [87.25, 27.646446609406727], [87.5, 27.75], [87.75, 27.646446609406727], [88.0, 27.75], [88.25, 27.646446609406727], [88.5, 27.75], [88.75, 27.646446609406727], [89.0, 27.75], [89.25, 27.646446609406727], [89.5, 27.75], [89.75, 27.646446609406727], [90.0, 27.75], [90.25, 27.646446609406727], [90.5, 27.75], [90.75, 27.646446609406727], [91.0, 27.75], [91.53033008588991, 27.53033008588991], [91.75, 27.0], [91.64644660940672, 26.75], [91.75, 26.5], [91.625, 26.19822330470336], [92.03033008588991, 26.03033008588991], [92.17677669529664, 25.67677669529664], [92.25, 25.646446609406727], [92.5, 25.75], [92.75, 25.646446609406727], [93.0, 25.75], [93.53033008588991, 25.53033008588991], [93.75, 25.0], [93.53033008588991, 24.46966991411009], [93.17677669529664, 24.32322330470336], [93.14644660940672, 24.25], [93.25, 24.0], [93.03033008588991, 23.46966991411009], [92.5, 23.25], [92.25, 23.353553390593273], [92.0, 23.25], [91.46966991411009, 23.46966991411009], [91.25, 24.0], [91.35355339059328, 24.25], [91.30177669529664, 24.375], [91.0, 24.25], [90.75, 24.353553390593273], [90.5, 24.25], [90.25, 24.353553390593273], [90.0, 24.25], [89.75, 24.353553390593273], [89.5, 24.25], [89.25, 24.353553390593273], [89.0, 24.25], [88.46966991411009, 24.46966991411009], [88.25, 25.0], [88.35355339059328, 25.25], [88.32322330470336, 25.32322330470336], [87.96966991411009, 25.46966991411009], [87.82322330470336, 25.82322330470336], [87.75, 25.853553390593273], [87.67677669529664, 25.82322330470336], [87.53033008588991, 25.46966991411009], [87.0, 25.25], [86.75, 25.353553390593273], [86.5, 25.25], [85.96966991411009, 25.46966991411009], [85.82322330470336, 25.82322330470336], [85.46966991411009, 25.96966991411009], [85.32322330470336, 26.32322330470336], [84.96966991411009, 26.46966991411009], [84.82322330470336, 26.82322330470336]]]}, "2021-07-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[87.46966991411009, 27.53033008588991], [88.0, 27.75], [88.25, 27.646446609406727], [88.5, 27.75], [88.75, 27.646446609406727], [89.0, 27.75], [89.53033008588991, 27.53033008588991], [89.75, 27.0], [89.64644660940672, 26.75], [89.75, 26.5], [89.64644660940672, 26.25], [89.67677669529664, 26.17677669529664], [90.03033008588991, 26.03033008588991], [90.17677669529664, 25.67677669529664], [90.25, 25.646446609406727], [90.5, 25.75], [90.75, 25.646446609406727], [91.0, 25.75], [91.53033008588991, 25.53033008588991], [91.75, 25.0], [91.53033008588991, 24.46966991411009], [91.0, 24.25], [90.75, 24.353553390593273], [90.5, 24.25], [90.25, 24.353553390593273], [90.0, 24.25], [89.46966991411009, 24.46966991411009], [89.32322330470336, 24.82322330470336], [88.96966991411009, 24.96966991411009], [88.82322330470336, 25.32322330470336], [88.75, 25.353553390593273], [88.5, 25.25], [87.96966991411009, 25.46966991411009], [87.82322330470336, 25.82322330470336], [87.75, 25.853553390593273], [87.5, 25.75], [86.96966991411009, 25.96966991411009], [86.75, 26.5], [86.96966991411009, 27.03033008588991], [87.32322330470336, 27.17677669529664], [87.46966991411009, 27.53033008588991]]], [[[85.0, 26.75], [84.46966991411009, 26.96966991411009], [84.25, 27.5], [84.46966991411009, 28.03033008588991], [85.0, 28.25], [85.25, 28.146446609406727], [85.5, 28.25], [86.03033008588991, 28.03033008588991], [86.25, 27.5], [86.03033008588991, 26.96966991411009], [85.5, 26.75], [85.25, 26.853553390593273], [85.0, 26.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.3104074998047963}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0362145217402388}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.20929327565227, 24.827069301837014, 24.63060746601502, 24.610540238475664, 25.192229841519463]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.264430487206198, 18.043040783601555, 17.92103953439289, 17.990281604366714, 20.82142282139938]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8397105825287856, -2.002893582029421, -2.133182821280494, -2.174070506336378, -1.5128542744345925]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.1605433101754556, -3.0994600681164, -2.9131868669497862, -3.3104074998047963, -2.0994375675107904]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5743880368789671, -1.7988779092194185, -1.9592737549383374, -1.9888610401660158, -1.4435019751258387]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.80634417702061, -2.512096194204398, -2.493123611297209, -2.642890630784744, -2.040202184450953]}}