{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:26:13.090199", "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-Jul-27_to_2021-Aug-01_84.5_22.0"}, "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": 2021070001105}, "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": "July 27 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 01 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 85783.6872094196}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 22.0}, "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": 84.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "84.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 82.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 85.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[82.47, 23.03], [82.823, 23.177], [82.854, 23.25], [82.854, 23.251], [82.75, 23.5], [82.97, 24.03], [83.5, 24.25], [83.749, 24.146], [83.75, 24.146], [83.823, 24.177], [83.97, 24.53], [84.323, 24.677], [84.47, 25.03], [85.0, 25.25], [85.25, 25.146], [85.5, 25.25], [86.03, 25.03], [86.25, 24.5], [86.03, 23.97], [85.677, 23.823], [85.53, 23.47], [85.0, 23.25], [84.75, 23.354], [84.677, 23.323], [84.646, 23.25], [84.646, 23.249], [84.656, 23.226], [84.677, 23.177], [85.03, 23.03], [85.177, 22.677], [85.25, 22.646], [85.5, 22.75], [86.03, 22.53], [86.25, 22.0], [86.146, 21.75], [86.25, 21.5], [86.03, 20.97], [85.5, 20.75], [85.25, 20.854], [85.249, 20.854], [85.0, 20.75], [84.751, 20.854], [84.75, 20.854], [84.734, 20.847], [84.677, 20.823], [84.53, 20.47], [84.0, 20.25], [83.75, 20.354], [83.5, 20.25], [83.25, 20.354], [83.0, 20.25], [82.47, 20.47], [82.323, 20.823], [82.25, 20.854], [82.0, 20.75], [81.47, 20.97], [81.25, 21.5], [81.47, 22.03], [81.823, 22.177], [81.97, 22.53], [82.323, 22.677], [82.47, 23.03]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-07-27T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[81.82322330470336, 22.17677669529664], [81.96966991411009, 22.53033008588991], [82.32322330470336, 22.67677669529664], [82.46966991411009, 23.03033008588991], [83.0, 23.25], [83.5, 23.042893218813454], [84.0, 23.25], [84.25, 23.146446609406727], [84.5, 23.25], [85.03033008588991, 23.03033008588991], [85.17677669529664, 22.67677669529664], [85.25, 22.646446609406727], [85.5, 22.75], [86.03033008588991, 22.53033008588991], [86.25, 22.0], [86.14644660940672, 21.75], [86.25, 21.5], [86.03033008588991, 20.96966991411009], [85.5, 20.75], [85.0, 20.957106781186546], [84.5, 20.75], [84.25, 20.853553390593273], [84.17677669529664, 20.82322330470336], [84.03033008588991, 20.46966991411009], [83.5, 20.25], [83.25, 20.353553390593273], [83.0, 20.25], [82.46966991411009, 20.46966991411009], [82.32322330470336, 20.82322330470336], [82.25, 20.853553390593273], [82.0, 20.75], [81.46966991411009, 20.96966991411009], [81.25, 21.5], [81.46966991411009, 22.03033008588991], [81.82322330470336, 22.17677669529664]]]}, "2021-07-28T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[81.82322330470336, 22.17677669529664], [81.96966991411009, 22.53033008588991], [82.32322330470336, 22.67677669529664], [82.46966991411009, 23.03033008588991], [82.82322330470336, 23.17677669529664], [82.96966991411009, 23.53033008588991], [83.32322330470336, 23.67677669529664], [83.46966991411009, 24.03033008588991], [84.0, 24.25], [84.53033008588991, 24.03033008588991], [84.75, 23.5], [84.625, 23.19822330470336], [85.03033008588991, 23.03033008588991], [85.17677669529664, 22.67677669529664], [85.25, 22.646446609406727], [85.5, 22.75], [86.03033008588991, 22.53033008588991], [86.25, 22.0], [86.14644660940672, 21.75], [86.25, 21.5], [86.03033008588991, 20.96966991411009], [85.5, 20.75], [85.0, 20.957106781186546], [84.67677669529664, 20.82322330470336], [84.53033008588991, 20.46966991411009], [84.0, 20.25], [83.75, 20.353553390593273], [83.5, 20.25], [83.25, 20.353553390593273], [83.0, 20.25], [82.46966991411009, 20.46966991411009], [82.32322330470336, 20.82322330470336], [82.25, 20.853553390593273], [82.0, 20.75], [81.46966991411009, 20.96966991411009], [81.25, 21.5], [81.46966991411009, 22.03033008588991], [81.82322330470336, 22.17677669529664]]]}, "2021-07-29T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[81.82322330470336, 22.17677669529664], [81.96966991411009, 22.53033008588991], [82.32322330470336, 22.67677669529664], [82.46966991411009, 23.03033008588991], [82.82322330470336, 23.17677669529664], [82.96966991411009, 23.53033008588991], [83.32322330470336, 23.67677669529664], [83.46966991411009, 24.03033008588991], [83.82322330470336, 24.17677669529664], [83.96966991411009, 24.53033008588991], [84.32322330470336, 24.67677669529664], [84.46966991411009, 25.03033008588991], [85.0, 25.25], [85.25, 25.146446609406727], [85.5, 25.25], [86.03033008588991, 25.03033008588991], [86.25, 24.5], [86.03033008588991, 23.96966991411009], [85.67677669529664, 23.82322330470336], [85.53033008588991, 23.46966991411009], [85.0, 23.25], [84.75, 23.353553390593273], [84.67677669529664, 23.32322330470336], [84.625, 23.19822330470336], [85.03033008588991, 23.03033008588991], [85.17677669529664, 22.67677669529664], [85.25, 22.646446609406727], [85.5, 22.75], [86.03033008588991, 22.53033008588991], [86.25, 22.0], [86.14644660940672, 21.75], [86.25, 21.5], [86.03033008588991, 20.96966991411009], [85.5, 20.75], [85.25, 20.853553390593273], [85.0, 20.75], [84.75, 20.853553390593273], [84.67677669529664, 20.82322330470336], [84.53033008588991, 20.46966991411009], [84.0, 20.25], [83.75, 20.353553390593273], [83.5, 20.25], [83.25, 20.353553390593273], [83.0, 20.25], [82.46966991411009, 20.46966991411009], [82.32322330470336, 20.82322330470336], [82.25, 20.853553390593273], [82.0, 20.75], [81.46966991411009, 20.96966991411009], [81.25, 21.5], [81.46966991411009, 22.03033008588991], [81.82322330470336, 22.17677669529664]]]}, "2021-07-30T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[82.25, 20.853553390593273], [82.0, 20.75], [81.46966991411009, 20.96966991411009], [81.25, 21.5], [81.46966991411009, 22.03033008588991], [82.0, 22.25], [82.25, 22.146446609406727], [82.32322330470336, 22.17677669529664], [82.46966991411009, 22.53033008588991], [82.82322330470336, 22.67677669529664], [82.85355339059328, 22.75], [82.75, 23.0], [82.85355339059328, 23.25], [82.75, 23.5], [82.96966991411009, 24.03033008588991], [83.5, 24.25], [83.75, 24.146446609406727], [83.82322330470336, 24.17677669529664], [83.96966991411009, 24.53033008588991], [84.32322330470336, 24.67677669529664], [84.46966991411009, 25.03033008588991], [85.0, 25.25], [85.25, 25.146446609406727], [85.5, 25.25], [86.03033008588991, 25.03033008588991], [86.25, 24.5], [86.03033008588991, 23.96966991411009], [85.67677669529664, 23.82322330470336], [85.53033008588991, 23.46966991411009], [85.0, 23.25], [84.75, 23.353553390593273], [84.67677669529664, 23.32322330470336], [84.64644660940672, 23.25], [84.67677669529664, 23.17677669529664], [85.03033008588991, 23.03033008588991], [85.17677669529664, 22.67677669529664], [85.25, 22.646446609406727], [85.5, 22.75], [86.03033008588991, 22.53033008588991], [86.25, 22.0], [86.14644660940672, 21.75], [86.25, 21.5], [86.03033008588991, 20.96966991411009], [85.5, 20.75], [85.25, 20.853553390593273], [85.0, 20.75], [84.75, 20.853553390593273], [84.67677669529664, 20.82322330470336], [84.53033008588991, 20.46966991411009], [84.0, 20.25], [83.75, 20.353553390593273], [83.5, 20.25], [83.25, 20.353553390593273], [83.0, 20.25], [82.46966991411009, 20.46966991411009], [82.32322330470336, 20.82322330470336], [82.25, 20.853553390593273]]]}, "2021-07-31T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[82.30177669529664, 22.125], [82.46966991411009, 22.53033008588991], [82.82322330470336, 22.67677669529664], [82.85355339059328, 22.75], [82.75, 23.0], [82.85355339059328, 23.25], [82.75, 23.5], [82.96966991411009, 24.03033008588991], [83.5, 24.25], [83.75, 24.146446609406727], [83.82322330470336, 24.17677669529664], [83.96966991411009, 24.53033008588991], [84.32322330470336, 24.67677669529664], [84.46966991411009, 25.03033008588991], [85.0, 25.25], [85.25, 25.146446609406727], [85.5, 25.25], [86.03033008588991, 25.03033008588991], [86.25, 24.5], [86.03033008588991, 23.96966991411009], [85.67677669529664, 23.82322330470336], [85.53033008588991, 23.46966991411009], [85.0, 23.25], [84.75, 23.353553390593273], [84.67677669529664, 23.32322330470336], [84.64644660940672, 23.25], [84.67677669529664, 23.17677669529664], [85.03033008588991, 23.03033008588991], [85.17677669529664, 22.67677669529664], [85.25, 22.646446609406727], [85.5, 22.75], [86.03033008588991, 22.53033008588991], [86.25, 22.0], [86.14644660940672, 21.75], [86.25, 21.5], [86.03033008588991, 20.96966991411009], [85.5, 20.75], [85.25, 20.853553390593273], [85.0, 20.75], [84.46966991411009, 20.96966991411009], [84.32322330470336, 21.32322330470336], [84.25, 21.353553390593273], [84.0, 21.25], [83.75, 21.353553390593273], [83.5, 21.25], [83.25, 21.353553390593273], [83.0, 21.25], [82.69822330470336, 21.375], [82.53033008588991, 20.96966991411009], [82.0, 20.75], [81.46966991411009, 20.96966991411009], [81.25, 21.5], [81.46966991411009, 22.03033008588991], [82.0, 22.25], [82.30177669529664, 22.125]]]}, "2021-08-01T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[82.85355339059328, 23.25], [82.75, 23.5], [82.96966991411009, 24.03033008588991], [83.5, 24.25], [84.03033008588991, 24.03033008588991], [84.17677669529664, 23.67677669529664], [84.53033008588991, 23.53033008588991], [84.75, 23.0], [84.53033008588991, 22.46966991411009], [84.0, 22.25], [83.75, 22.353553390593273], [83.5, 22.25], [82.96966991411009, 22.46966991411009], [82.75, 23.0], [82.85355339059328, 23.25]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.5088736799910976}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9412387368932602}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.26799185791532, 24.904244357000437, 24.947716803193487, 24.833249630808723, 24.701467886945125, 23.51509633886036]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.40319996796069, 23.097411283032898, 23.499566630890172, 23.230787401425005, 22.67652652280566, 23.178347128856046]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7268177384812289, -1.921904247969772, -2.039504169638566, -2.0344082024540517, -1.954888909171902, -1.5697426092016826]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8954760336746403, -2.3133501363914775, -2.5088736799910976, -2.4764153040028987, -2.4701765993798404, -1.6247259207324305]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4053090089217357, -1.5114675610319896, -1.5901560655650473, -1.6623927769117888, -1.7333654126684561, -1.5178597441602673]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6147669827944342, -1.7256022918639558, -1.8423904031497136, -2.260780790694028, -2.1477394421614364, -1.591884876839241]}}