{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:18:53.297690", "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-Oct-28_to_2020-Nov-03_76.0_41.0"}, "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": 2020100000848}, "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": "October 28 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 03 2020"}, "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": 105016.69473812467}, "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": ["China", "Kyrgyzstan", "Tajikistan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 41.0}, "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": 76.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "76.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 71.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 77.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[72.25, 40.646], [72.251, 40.646], [72.5, 40.75], [72.749, 40.646], [72.75, 40.646], [72.797, 40.666], [72.823, 40.677], [72.854, 40.75], [72.823, 40.823], [72.47, 40.97], [72.323, 41.323], [72.25, 41.354], [72.249, 41.354], [72.0, 41.25], [71.47, 41.47], [71.25, 42.0], [71.354, 42.25], [71.25, 42.5], [71.47, 43.03], [72.0, 43.25], [72.25, 43.146], [72.5, 43.25], [72.75, 43.146], [73.0, 43.25], [73.25, 43.146], [73.251, 43.146], [73.5, 43.25], [73.749, 43.146], [73.75, 43.146], [74.0, 43.25], [74.5, 43.043], [75.0, 43.25], [75.53, 43.03], [75.677, 42.677], [76.03, 42.53], [76.25, 42.0], [76.146, 41.75], [76.177, 41.677], [76.25, 41.646], [76.5, 41.75], [76.75, 41.646], [77.0, 41.75], [77.25, 41.646], [77.5, 41.75], [78.03, 41.53], [78.25, 41.0], [78.03, 40.47], [77.677, 40.323], [77.53, 39.97], [77.0, 39.75], [76.75, 39.854], [76.749, 39.854], [76.5, 39.75], [76.251, 39.854], [76.25, 39.854], [76.177, 39.823], [76.03, 39.47], [75.5, 39.25], [74.97, 39.47], [74.823, 39.823], [74.75, 39.854], [74.677, 39.823], [74.646, 39.75], [74.75, 39.5], [74.53, 38.97], [74.0, 38.75], [73.75, 38.854], [73.677, 38.823], [73.53, 38.47], [73.0, 38.25], [72.47, 38.47], [72.323, 38.823], [71.97, 38.97], [71.823, 39.323], [71.774, 39.344], [71.75, 39.354], [71.5, 39.25], [70.97, 39.47], [70.75, 40.0], [70.97, 40.53], [71.5, 40.75], [71.75, 40.646], [72.0, 40.75], [72.25, 40.646]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.C.Asia", "E.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-10-28T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[71.35355339059328, 42.25], [71.25, 42.5], [71.46966991411009, 43.03033008588991], [72.0, 43.25], [72.53033008588991, 43.03033008588991], [72.75, 42.5], [72.64644660940672, 42.25], [72.75, 42.0], [72.53033008588991, 41.46966991411009], [72.0, 41.25], [71.46966991411009, 41.46966991411009], [71.25, 42.0], [71.35355339059328, 42.25]]]}, "2020-10-29T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[71.35355339059328, 42.25], [71.25, 42.5], [71.46966991411009, 43.03033008588991], [72.0, 43.25], [72.25, 43.14644660940672], [72.5, 43.25], [72.75, 43.14644660940672], [73.0, 43.25], [73.25, 43.14644660940672], [73.5, 43.25], [73.75, 43.14644660940672], [74.0, 43.25], [74.5, 43.042893218813454], [75.0, 43.25], [75.53033008588991, 43.03033008588991], [75.67677669529664, 42.67677669529664], [76.03033008588991, 42.53033008588991], [76.25, 42.0], [76.14644660940672, 41.75], [76.17677669529664, 41.67677669529664], [76.25, 41.64644660940672], [76.5, 41.75], [76.75, 41.64644660940672], [77.0, 41.75], [77.25, 41.64644660940672], [77.5, 41.75], [78.03033008588991, 41.53033008588991], [78.25, 41.0], [78.03033008588991, 40.46966991411009], [77.5, 40.25], [77.25, 40.35355339059328], [77.17677669529664, 40.32322330470336], [77.03033008588991, 39.96966991411009], [76.5, 39.75], [76.25, 39.85355339059328], [76.0, 39.75], [75.75, 39.85355339059328], [75.5, 39.75], [75.25, 39.85355339059328], [75.0, 39.75], [74.75, 39.85355339059328], [74.67677669529664, 39.82322330470336], [74.64644660940672, 39.75], [74.75, 39.5], [74.53033008588991, 38.96966991411009], [74.0, 38.75], [73.75, 38.85355339059328], [73.67677669529664, 38.82322330470336], [73.53033008588991, 38.46966991411009], [73.0, 38.25], [72.46966991411009, 38.46966991411009], [72.32322330470336, 38.82322330470336], [71.96966991411009, 38.96966991411009], [71.82322330470336, 39.32322330470336], [71.75, 39.35355339059328], [71.5, 39.25], [70.96966991411009, 39.46966991411009], [70.75, 40.0], [70.96966991411009, 40.53033008588991], [71.5, 40.75], [71.75, 40.64644660940672], [72.0, 40.75], [72.25, 40.64644660940672], [72.5, 40.75], [72.75, 40.64644660940672], [72.82322330470336, 40.67677669529664], [72.85355339059328, 40.75], [72.82322330470336, 40.82322330470336], [72.46966991411009, 40.96966991411009], [72.32322330470336, 41.32322330470336], [72.25, 41.35355339059328], [72.0, 41.25], [71.46966991411009, 41.46966991411009], [71.25, 42.0], [71.35355339059328, 42.25]]]}, "2020-10-30T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[71.35355339059328, 42.25], [71.25, 42.5], [71.46966991411009, 43.03033008588991], [72.0, 43.25], [72.25, 43.14644660940672], [72.5, 43.25], [72.75, 43.14644660940672], [73.0, 43.25], [73.25, 43.14644660940672], [73.5, 43.25], [73.75, 43.14644660940672], [74.0, 43.25], [74.5, 43.042893218813454], [75.0, 43.25], [75.53033008588991, 43.03033008588991], [75.67677669529664, 42.67677669529664], [76.03033008588991, 42.53033008588991], [76.25, 42.0], [76.14644660940672, 41.75], [76.17677669529664, 41.67677669529664], [76.25, 41.64644660940672], [76.5, 41.75], [76.75, 41.64644660940672], [77.0, 41.75], [77.25, 41.64644660940672], [77.5, 41.75], [78.03033008588991, 41.53033008588991], [78.25, 41.0], [78.03033008588991, 40.46966991411009], [77.67677669529664, 40.32322330470336], [77.53033008588991, 39.96966991411009], [77.0, 39.75], [76.75, 39.85355339059328], [76.5, 39.75], [76.25, 39.85355339059328], [76.17677669529664, 39.82322330470336], [76.03033008588991, 39.46966991411009], [75.5, 39.25], [74.96966991411009, 39.46966991411009], [74.82322330470336, 39.82322330470336], [74.75, 39.85355339059328], [74.67677669529664, 39.82322330470336], [74.64644660940672, 39.75], [74.75, 39.5], [74.53033008588991, 38.96966991411009], [74.0, 38.75], [73.75, 38.85355339059328], [73.67677669529664, 38.82322330470336], [73.53033008588991, 38.46966991411009], [73.0, 38.25], [72.46966991411009, 38.46966991411009], [72.32322330470336, 38.82322330470336], [71.96966991411009, 38.96966991411009], [71.82322330470336, 39.32322330470336], [71.75, 39.35355339059328], [71.5, 39.25], [70.96966991411009, 39.46966991411009], [70.75, 40.0], [70.96966991411009, 40.53033008588991], [71.5, 40.75], [71.75, 40.64644660940672], [72.0, 40.75], [72.25, 40.64644660940672], [72.5, 40.75], [72.75, 40.64644660940672], [72.82322330470336, 40.67677669529664], [72.85355339059328, 40.75], [72.82322330470336, 40.82322330470336], [72.46966991411009, 40.96966991411009], [72.32322330470336, 41.32322330470336], [72.25, 41.35355339059328], [72.0, 41.25], [71.46966991411009, 41.46966991411009], [71.25, 42.0], [71.35355339059328, 42.25]]]}, "2020-10-31T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[71.75, 39.35355339059328], [71.5, 39.25], [70.96966991411009, 39.46966991411009], [70.75, 40.0], [70.96966991411009, 40.53033008588991], [71.5, 40.75], [71.75, 40.64644660940672], [72.0, 40.75], [72.25, 40.64644660940672], [72.5, 40.75], [72.75, 40.64644660940672], [72.82322330470336, 40.67677669529664], [72.85355339059328, 40.75], [72.82322330470336, 40.82322330470336], [72.46966991411009, 40.96966991411009], [72.32322330470336, 41.32322330470336], [71.96966991411009, 41.46966991411009], [71.75, 42.0], [71.85355339059328, 42.25], [71.75, 42.5], [71.96966991411009, 43.03033008588991], [72.5, 43.25], [72.75, 43.14644660940672], [73.0, 43.25], [73.25, 43.14644660940672], [73.5, 43.25], [73.75, 43.14644660940672], [74.0, 43.25], [74.5, 43.042893218813454], [75.0, 43.25], [75.53033008588991, 43.03033008588991], [75.67677669529664, 42.67677669529664], [76.03033008588991, 42.53033008588991], [76.25, 42.0], [76.14644660940672, 41.75], [76.17677669529664, 41.67677669529664], [76.25, 41.64644660940672], [76.5, 41.75], [76.75, 41.64644660940672], [77.0, 41.75], [77.25, 41.64644660940672], [77.5, 41.75], [78.03033008588991, 41.53033008588991], [78.25, 41.0], [78.03033008588991, 40.46966991411009], [77.67677669529664, 40.32322330470336], [77.53033008588991, 39.96966991411009], [77.0, 39.75], [76.75, 39.85355339059328], [76.5, 39.75], [76.25, 39.85355339059328], [76.17677669529664, 39.82322330470336], [76.03033008588991, 39.46966991411009], [75.5, 39.25], [74.96966991411009, 39.46966991411009], [74.82322330470336, 39.82322330470336], [74.75, 39.85355339059328], [74.67677669529664, 39.82322330470336], [74.64644660940672, 39.75], [74.75, 39.5], [74.53033008588991, 38.96966991411009], [74.0, 38.75], [73.75, 38.85355339059328], [73.67677669529664, 38.82322330470336], [73.53033008588991, 38.46966991411009], [73.0, 38.25], [72.46966991411009, 38.46966991411009], [72.32322330470336, 38.82322330470336], [71.96966991411009, 38.96966991411009], [71.82322330470336, 39.32322330470336], [71.75, 39.35355339059328]]]}, "2020-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.0, 39.25], [71.46966991411009, 39.46966991411009], [71.25, 40.0], [71.46966991411009, 40.53033008588991], [72.0, 40.75], [72.5, 40.542893218813454], [73.0, 40.75], [73.25, 40.64644660940672], [73.32322330470336, 40.67677669529664], [73.46966991411009, 41.03033008588991], [74.0, 41.25], [74.30177669529664, 41.125], [74.46966991411009, 41.53033008588991], [75.0, 41.75], [75.25, 41.64644660940672], [75.5, 41.75], [75.75, 41.64644660940672], [76.0, 41.75], [76.25, 41.64644660940672], [76.5, 41.75], [76.75, 41.64644660940672], [77.0, 41.75], [77.53033008588991, 41.53033008588991], [77.75, 41.0], [77.64644660940672, 40.75], [77.75, 40.5], [77.53033008588991, 39.96966991411009], [77.0, 39.75], [76.5, 39.957106781186546], [76.17677669529664, 39.82322330470336], [76.03033008588991, 39.46966991411009], [75.5, 39.25], [74.96966991411009, 39.46966991411009], [74.75, 40.0], [74.875, 40.30177669529664], [74.69822330470336, 40.375], [74.53033008588991, 39.96966991411009], [74.17677669529664, 39.82322330470336], [74.03033008588991, 39.46966991411009], [73.5, 39.25], [73.25, 39.35355339059328], [73.0, 39.25], [72.5, 39.457106781186546], [72.0, 39.25]]], [[[71.75, 42.5], [71.96966991411009, 43.03033008588991], [72.5, 43.25], [72.75, 43.14644660940672], [73.0, 43.25], [73.5, 43.042893218813454], [74.0, 43.25], [74.53033008588991, 43.03033008588991], [74.75, 42.5], [74.53033008588991, 41.96966991411009], [74.0, 41.75], [73.69822330470336, 41.875], [73.53033008588991, 41.46966991411009], [73.0, 41.25], [72.75, 41.35355339059328], [72.5, 41.25], [71.96966991411009, 41.46966991411009], [71.75, 42.0], [71.85355339059328, 42.25], [71.75, 42.5]]]]}, "2020-11-02T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[76.25, 40.35355339059328], [76.0, 40.25], [75.46966991411009, 40.46966991411009], [75.25, 41.0], [75.46966991411009, 41.53033008588991], [76.0, 41.75], [76.25, 41.64644660940672], [76.5, 41.75], [77.03033008588991, 41.53033008588991], [77.17677669529664, 41.17677669529664], [77.53033008588991, 41.03033008588991], [77.75, 40.5], [77.53033008588991, 39.96966991411009], [77.0, 39.75], [76.46966991411009, 39.96966991411009], [76.32322330470336, 40.32322330470336], [76.25, 40.35355339059328]]]}, "2020-11-03T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[76.25, 40.5], [76.46966991411009, 41.03033008588991], [77.0, 41.25], [77.53033008588991, 41.03033008588991], [77.75, 40.5], [77.53033008588991, 39.96966991411009], [77.0, 39.75], [76.46966991411009, 39.96966991411009], [76.25, 40.5]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.767597479494526}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.016361655167595}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.487485499935872, -11.327901976741373, -12.108124345169756, -11.137123163737044, -10.574523804504281, -12.564889086396647, -9.514296386678268]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-6.186393699071402, -22.05744684035497, -21.650406244768675, -20.283542312015015, -16.7384441474029, -14.244962119488548, -9.514296386678268]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.293173170790823, -7.059301166918374, -7.901295773187993, -6.624629129201588, -6.099681654755978, -5.696057382025761, -5.183275750680821]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.048771883574489, -9.983842314231651, -12.767597479494526, -11.2989183044279, -8.622810713653053, -5.866223250583062, -5.183275750680821]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4197249911254382, -2.096485094848889, -2.343873518811066, -1.9536590926215003, -1.7634105908903843, -1.6265775638925846, -1.633716649391609]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5192157547360843, -2.9577254214889455, -4.249024355691082, -3.2275659909064833, -2.395802875556151, -1.869956916150219, -1.633716649391609]}}