{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:25:15.580664", "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-15_to_2021-Jun-21_69.5_28.0"}, "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": 2021060000682}, "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 15 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 21 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 102789.47071029495}, "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": ["India", "Pakistan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 28.0}, "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": 69.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "69.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 68.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 73.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[69.726, 27.344], [69.677, 27.323], [69.53, 26.97], [69.0, 26.75], [68.75, 26.854], [68.726, 26.844], [68.677, 26.823], [68.53, 26.47], [68.0, 26.25], [67.47, 26.47], [67.25, 27.0], [67.47, 27.53], [67.823, 27.677], [67.854, 27.75], [67.823, 27.823], [67.47, 27.97], [67.25, 28.5], [67.47, 29.03], [67.823, 29.177], [67.97, 29.53], [68.5, 29.75], [68.75, 29.646], [69.0, 29.75], [69.25, 29.646], [69.323, 29.677], [69.47, 30.03], [69.823, 30.177], [69.97, 30.53], [70.323, 30.677], [70.47, 31.03], [71.0, 31.25], [71.53, 31.03], [71.677, 30.677], [71.75, 30.646], [72.0, 30.75], [72.25, 30.646], [72.5, 30.75], [73.03, 30.53], [73.177, 30.177], [73.53, 30.03], [73.677, 29.677], [74.03, 29.53], [74.25, 29.0], [74.03, 28.47], [73.5, 28.25], [73.25, 28.354], [73.0, 28.25], [72.75, 28.354], [72.5, 28.25], [72.25, 28.354], [72.0, 28.25], [71.75, 28.354], [71.677, 28.323], [71.53, 27.97], [71.0, 27.75], [70.75, 27.854], [70.726, 27.844], [70.677, 27.823], [70.53, 27.47], [70.0, 27.25], [69.75, 27.354], [69.726, 27.344]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.Asia", "S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-06-15T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[69.35355339059328, 28.75], [69.25, 29.0], [69.35355339059328, 29.25], [69.25, 29.5], [69.46966991411009, 30.03033008588991], [69.82322330470336, 30.17677669529664], [69.96966991411009, 30.53033008588991], [70.32322330470336, 30.67677669529664], [70.46966991411009, 31.03033008588991], [71.0, 31.25], [71.53033008588991, 31.03033008588991], [71.67677669529664, 30.67677669529664], [71.75, 30.646446609406727], [72.0, 30.75], [72.25, 30.646446609406727], [72.5, 30.75], [73.03033008588991, 30.53033008588991], [73.17677669529664, 30.17677669529664], [73.53033008588991, 30.03033008588991], [73.67677669529664, 29.67677669529664], [74.03033008588991, 29.53033008588991], [74.25, 29.0], [74.03033008588991, 28.46966991411009], [73.5, 28.25], [73.25, 28.353553390593273], [73.0, 28.25], [72.75, 28.353553390593273], [72.5, 28.25], [72.25, 28.353553390593273], [72.0, 28.25], [71.75, 28.353553390593273], [71.5, 28.25], [71.25, 28.353553390593273], [71.17677669529664, 28.32322330470336], [71.03033008588991, 27.96966991411009], [70.5, 27.75], [70.25, 27.853553390593273], [70.0, 27.75], [69.46966991411009, 27.96966991411009], [69.25, 28.5], [69.35355339059328, 28.75]]]}, "2021-06-16T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[67.82322330470336, 27.67677669529664], [67.85355339059328, 27.75], [67.82322330470336, 27.82322330470336], [67.46966991411009, 27.96966991411009], [67.25, 28.5], [67.46966991411009, 29.03033008588991], [67.82322330470336, 29.17677669529664], [67.96966991411009, 29.53033008588991], [68.5, 29.75], [68.75, 29.646446609406727], [69.0, 29.75], [69.25, 29.646446609406727], [69.32322330470336, 29.67677669529664], [69.46966991411009, 30.03033008588991], [69.82322330470336, 30.17677669529664], [69.96966991411009, 30.53033008588991], [70.32322330470336, 30.67677669529664], [70.46966991411009, 31.03033008588991], [71.0, 31.25], [71.53033008588991, 31.03033008588991], [71.67677669529664, 30.67677669529664], [71.75, 30.646446609406727], [72.0, 30.75], [72.25, 30.646446609406727], [72.5, 30.75], [73.03033008588991, 30.53033008588991], [73.17677669529664, 30.17677669529664], [73.53033008588991, 30.03033008588991], [73.67677669529664, 29.67677669529664], [74.03033008588991, 29.53033008588991], [74.25, 29.0], [74.03033008588991, 28.46966991411009], [73.5, 28.25], [73.25, 28.353553390593273], [73.0, 28.25], [72.75, 28.353553390593273], [72.5, 28.25], [72.25, 28.353553390593273], [72.0, 28.25], [71.75, 28.353553390593273], [71.67677669529664, 28.32322330470336], [71.53033008588991, 27.96966991411009], [71.0, 27.75], [70.75, 27.853553390593273], [70.67677669529664, 27.82322330470336], [70.53033008588991, 27.46966991411009], [70.0, 27.25], [69.75, 27.353553390593273], [69.67677669529664, 27.32322330470336], [69.53033008588991, 26.96966991411009], [69.0, 26.75], [68.75, 26.853553390593273], [68.67677669529664, 26.82322330470336], [68.53033008588991, 26.46966991411009], [68.0, 26.25], [67.46966991411009, 26.46966991411009], [67.25, 27.0], [67.46966991411009, 27.53033008588991], [67.82322330470336, 27.67677669529664]]]}, "2021-06-17T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[67.82322330470336, 27.67677669529664], [67.85355339059328, 27.75], [67.82322330470336, 27.82322330470336], [67.46966991411009, 27.96966991411009], [67.25, 28.5], [67.46966991411009, 29.03033008588991], [67.82322330470336, 29.17677669529664], [67.96966991411009, 29.53033008588991], [68.5, 29.75], [68.75, 29.646446609406727], [69.0, 29.75], [69.25, 29.646446609406727], [69.32322330470336, 29.67677669529664], [69.46966991411009, 30.03033008588991], [69.82322330470336, 30.17677669529664], [69.96966991411009, 30.53033008588991], [70.32322330470336, 30.67677669529664], [70.46966991411009, 31.03033008588991], [71.0, 31.25], [71.53033008588991, 31.03033008588991], [71.67677669529664, 30.67677669529664], [71.75, 30.646446609406727], [72.0, 30.75], [72.25, 30.646446609406727], [72.5, 30.75], [73.03033008588991, 30.53033008588991], [73.17677669529664, 30.17677669529664], [73.53033008588991, 30.03033008588991], [73.67677669529664, 29.67677669529664], [74.03033008588991, 29.53033008588991], [74.25, 29.0], [74.03033008588991, 28.46966991411009], [73.5, 28.25], [73.25, 28.353553390593273], [73.0, 28.25], [72.75, 28.353553390593273], [72.5, 28.25], [72.25, 28.353553390593273], [72.0, 28.25], [71.75, 28.353553390593273], [71.67677669529664, 28.32322330470336], [71.53033008588991, 27.96966991411009], [71.0, 27.75], [70.75, 27.853553390593273], [70.67677669529664, 27.82322330470336], [70.53033008588991, 27.46966991411009], [70.0, 27.25], [69.75, 27.353553390593273], [69.67677669529664, 27.32322330470336], [69.53033008588991, 26.96966991411009], [69.0, 26.75], [68.75, 26.853553390593273], [68.67677669529664, 26.82322330470336], [68.53033008588991, 26.46966991411009], [68.0, 26.25], [67.46966991411009, 26.46966991411009], [67.25, 27.0], [67.46966991411009, 27.53033008588991], [67.82322330470336, 27.67677669529664]]]}, "2021-06-18T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[67.82322330470336, 27.67677669529664], [67.85355339059328, 27.75], [67.82322330470336, 27.82322330470336], [67.46966991411009, 27.96966991411009], [67.25, 28.5], [67.46966991411009, 29.03033008588991], [67.82322330470336, 29.17677669529664], [67.96966991411009, 29.53033008588991], [68.5, 29.75], [68.75, 29.646446609406727], [69.0, 29.75], [69.25, 29.646446609406727], [69.32322330470336, 29.67677669529664], [69.46966991411009, 30.03033008588991], [70.0, 30.25], [70.53033008588991, 30.03033008588991], [70.67677669529664, 29.67677669529664], [70.75, 29.646446609406727], [71.0, 29.75], [71.53033008588991, 29.53033008588991], [71.75, 29.0], [71.64644660940672, 28.75], [71.75, 28.5], [71.53033008588991, 27.96966991411009], [71.0, 27.75], [70.75, 27.853553390593273], [70.67677669529664, 27.82322330470336], [70.53033008588991, 27.46966991411009], [70.0, 27.25], [69.75, 27.353553390593273], [69.67677669529664, 27.32322330470336], [69.53033008588991, 26.96966991411009], [69.0, 26.75], [68.75, 26.853553390593273], [68.67677669529664, 26.82322330470336], [68.53033008588991, 26.46966991411009], [68.0, 26.25], [67.46966991411009, 26.46966991411009], [67.25, 27.0], [67.46966991411009, 27.53033008588991], [67.82322330470336, 27.67677669529664]]]}, "2021-06-19T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[67.85355339059328, 27.75], [67.75, 28.0], [67.85355339059328, 28.25], [67.75, 28.5], [67.96966991411009, 29.03033008588991], [68.5, 29.25], [69.03033008588991, 29.03033008588991], [69.17677669529664, 28.67677669529664], [69.25, 28.646446609406727], [69.5, 28.75], [70.03033008588991, 28.53033008588991], [70.25, 28.0], [70.03033008588991, 27.46966991411009], [69.5, 27.25], [69.25, 27.353553390593273], [69.17677669529664, 27.32322330470336], [69.03033008588991, 26.96966991411009], [68.5, 26.75], [67.96966991411009, 26.96966991411009], [67.75, 27.5], [67.85355339059328, 27.75]]]}, "2021-06-20T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[68.75, 28.0], [68.96966991411009, 28.53033008588991], [69.5, 28.75], [70.03033008588991, 28.53033008588991], [70.25, 28.0], [70.03033008588991, 27.46966991411009], [69.5, 27.25], [68.96966991411009, 27.46966991411009], [68.75, 28.0]]]}, "2021-06-21T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[68.75, 28.0], [68.96966991411009, 28.53033008588991], [69.5, 28.75], [70.03033008588991, 28.53033008588991], [70.25, 28.0], [70.03033008588991, 27.46966991411009], [69.5, 27.25], [68.96966991411009, 27.46966991411009], [68.75, 28.0]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.25340891554822}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.424812959719059}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.721829550699283, 32.26448280625061, 30.0622188588398, 32.59209317377838, 34.43465394474947, 34.51046842615506, 33.17856751799957]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.834007696493586, 28.83760675003782, 26.26938909995033, 29.49472696809397, 33.49109928391749, 34.51046842615506, 33.17856751799957]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.73284260993611, -3.609016779309382, -5.833615195941187, -3.7246471473608835, -2.247573613122847, -1.7541507279557322, -3.0662419081200483]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.18865985680668, -5.803421948426376, -8.25340891554822, -4.717595722954286, -2.785600745948841, -1.7541507279557322, -3.0662419081200483]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.1556311927984804, -1.8018841995566783, -3.0952136315873466, -2.0545028511140258, -1.5516822274940985, -1.188693070313255, -2.1170919492015803]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.641881263148117, -2.5517210722808414, -4.987363163151761, -2.7107429424768403, -1.803900354647827, -1.188693070313255, -2.1170919492015803]}}