{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:37.176720", "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": "2018-Apr-07_to_2018-Apr-12_86.5_18.5"}, "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": 2018040000414}, "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": "April 07 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2018"}, "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": 239441.36238025903}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Bay-of-Bengal", "S.Asia"]}, "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": ["Bay of Bengal"]}, "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": 18.5}, "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": 86.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "86.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 81.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 88.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.85, 18.75], [82.75, 19.0], [82.97, 19.53], [83.32, 19.68], [83.35, 19.75], [83.25, 20.0], [83.47, 20.53], [83.88, 20.7], [83.75, 21.0], [83.97, 21.53], [84.32, 21.68], [84.47, 22.03], [85.0, 22.25], [85.5, 22.04], [86.0, 22.25], [86.25, 22.15], [86.5, 22.25], [86.75, 22.15], [87.0, 22.25], [87.25, 22.15], [87.5, 22.25], [88.0, 22.04], [88.5, 22.25], [89.03, 22.03], [89.25, 21.5], [89.03, 20.97], [88.68, 20.82], [88.65, 20.75], [88.75, 20.5], [88.65, 20.25], [88.75, 20.0], [88.65, 19.75], [88.75, 19.5], [88.54, 19.0], [88.75, 18.5], [88.53, 17.97], [88.18, 17.82], [88.03, 17.47], [87.68, 17.32], [87.53, 16.97], [87.0, 16.75], [86.75, 16.85], [86.5, 16.75], [85.97, 16.97], [85.75, 17.5], [85.85, 17.75], [85.75, 18.0], [85.85, 18.25], [85.75, 18.5], [85.97, 19.03], [86.38, 19.2], [86.32, 19.32], [86.25, 19.35], [86.0, 19.25], [85.75, 19.35], [85.5, 19.25], [85.25, 19.35], [85.0, 19.25], [84.7, 19.38], [84.65, 19.25], [84.75, 19.0], [84.53, 18.47], [84.18, 18.32], [84.15, 18.25], [84.25, 18.0], [84.03, 17.47], [83.5, 17.25], [82.97, 17.47], [82.75, 18.0], [82.85, 18.25], [82.75, 18.5], [82.85, 18.75]]]]}, "2018-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.97, 15.47], [80.75, 16.0], [80.97, 16.53], [81.5, 16.75], [81.75, 16.65], [81.82, 16.68], [81.85, 16.75], [81.75, 17.0], [81.97, 17.53], [82.5, 17.75], [82.75, 17.65], [82.82, 17.68], [82.85, 17.75], [82.75, 18.0], [82.85, 18.25], [82.75, 18.5], [82.85, 18.75], [82.75, 19.0], [82.97, 19.53], [83.32, 19.68], [83.35, 19.75], [83.25, 20.0], [83.47, 20.53], [83.88, 20.7], [83.75, 21.0], [83.97, 21.53], [84.32, 21.68], [84.47, 22.03], [85.0, 22.25], [85.5, 22.04], [86.0, 22.25], [86.25, 22.15], [86.5, 22.25], [86.75, 22.15], [87.0, 22.25], [87.25, 22.15], [87.5, 22.25], [88.0, 22.04], [88.5, 22.25], [89.03, 22.03], [89.25, 21.5], [89.15, 21.25], [89.25, 21.0], [89.15, 20.75], [89.25, 20.5], [89.15, 20.25], [89.25, 20.0], [89.15, 19.75], [89.25, 19.5], [89.03, 18.97], [88.63, 18.8], [88.75, 18.5], [88.53, 17.97], [88.18, 17.82], [88.03, 17.47], [87.68, 17.32], [87.53, 16.97], [87.0, 16.75], [86.75, 16.85], [86.5, 16.75], [86.25, 16.85], [86.0, 16.75], [85.75, 16.85], [85.68, 16.82], [85.53, 16.47], [85.0, 16.25], [84.75, 16.35], [84.5, 16.25], [84.25, 16.35], [84.0, 16.25], [83.75, 16.35], [83.5, 16.25], [83.25, 16.35], [83.18, 16.32], [83.03, 15.97], [82.68, 15.82], [82.53, 15.47], [82.0, 15.25], [81.75, 15.35], [81.5, 15.25], [80.97, 15.47]]]]}, "2018-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.97, 15.47], [80.75, 16.0], [80.97, 16.53], [81.5, 16.75], [81.75, 16.65], [81.82, 16.68], [81.85, 16.75], [81.75, 17.0], [81.97, 17.53], [82.5, 17.75], [82.75, 17.65], [82.82, 17.68], [82.85, 17.75], [82.75, 18.0], [82.85, 18.25], [82.75, 18.5], [82.85, 18.75], [82.75, 19.0], [82.97, 19.53], [83.32, 19.68], [83.35, 19.75], [83.25, 20.0], [83.47, 20.53], [83.88, 20.7], [83.75, 21.0], [83.97, 21.53], [84.32, 21.68], [84.47, 22.03], [85.0, 22.25], [85.5, 22.04], [86.0, 22.25], [86.25, 22.15], [86.5, 22.25], [86.75, 22.15], [87.0, 22.25], [87.25, 22.15], [87.5, 22.25], [88.0, 22.04], [88.5, 22.25], [89.03, 22.03], [89.25, 21.5], [89.15, 21.25], [89.25, 21.0], [89.15, 20.75], [89.25, 20.5], [89.15, 20.25], [89.25, 20.0], [89.15, 19.75], [89.25, 19.5], [89.03, 18.97], [88.63, 18.8], [88.75, 18.5], [88.53, 17.97], [88.18, 17.82], [88.03, 17.47], [87.68, 17.32], [87.53, 16.97], [87.0, 16.75], [86.75, 16.85], [86.5, 16.75], [86.25, 16.85], [86.0, 16.75], [85.75, 16.85], [85.68, 16.82], [85.53, 16.47], [85.0, 16.25], [84.75, 16.35], [84.5, 16.25], [84.25, 16.35], [84.0, 16.25], [83.75, 16.35], [83.5, 16.25], [83.25, 16.35], [83.18, 16.32], [83.03, 15.97], [82.68, 15.82], [82.53, 15.47], [82.0, 15.25], [81.75, 15.35], [81.5, 15.25], [80.97, 15.47]]]]}, "2018-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.97, 15.47], [80.75, 16.0], [80.97, 16.53], [81.5, 16.75], [81.75, 16.65], [81.82, 16.68], [81.85, 16.75], [81.75, 17.0], [81.97, 17.53], [82.5, 17.75], [82.75, 17.65], [82.82, 17.68], [82.85, 17.75], [82.75, 18.0], [82.85, 18.25], [82.75, 18.5], [82.85, 18.75], [82.75, 19.0], [82.97, 19.53], [83.32, 19.68], [83.35, 19.75], [83.25, 20.0], [83.47, 20.53], [84.0, 20.75], [84.3, 20.63], [84.35, 20.75], [84.25, 21.0], [84.47, 21.53], [85.0, 21.75], [85.25, 21.65], [85.32, 21.68], [85.47, 22.03], [86.0, 22.25], [86.25, 22.15], [86.5, 22.25], [86.75, 22.15], [87.0, 22.25], [87.25, 22.15], [87.5, 22.25], [88.03, 22.03], [88.18, 21.68], [88.25, 21.65], [88.5, 21.75], [89.03, 21.53], [89.25, 21.0], [89.15, 20.75], [89.25, 20.5], [89.15, 20.25], [89.25, 20.0], [89.15, 19.75], [89.25, 19.5], [89.03, 18.97], [88.5, 18.75], [88.25, 18.85], [88.18, 18.82], [88.03, 18.47], [87.68, 18.32], [87.53, 17.97], [87.18, 17.82], [87.03, 17.47], [86.68, 17.32], [86.53, 16.97], [86.0, 16.75], [85.75, 16.85], [85.68, 16.82], [85.53, 16.47], [85.0, 16.25], [84.75, 16.35], [84.5, 16.25], [84.25, 16.35], [84.0, 16.25], [83.75, 16.35], [83.5, 16.25], [83.25, 16.35], [83.18, 16.32], [83.03, 15.97], [82.68, 15.82], [82.53, 15.47], [82.0, 15.25], [81.75, 15.35], [81.5, 15.25], [80.97, 15.47]]]]}, "2018-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[83.47, 18.03], [83.82, 18.18], [83.97, 18.53], [84.5, 18.75], [84.75, 18.65], [84.82, 18.68], [84.97, 19.03], [85.32, 19.18], [85.47, 19.53], [85.82, 19.68], [85.97, 20.03], [86.5, 20.25], [86.75, 20.15], [87.0, 20.25], [87.25, 20.15], [87.5, 20.25], [87.75, 20.15], [88.0, 20.25], [88.53, 20.03], [88.75, 19.5], [88.53, 18.97], [88.18, 18.82], [88.03, 18.47], [87.68, 18.32], [87.53, 17.97], [87.18, 17.82], [87.03, 17.47], [86.68, 17.32], [86.53, 16.97], [86.0, 16.75], [85.75, 16.85], [85.68, 16.82], [85.53, 16.47], [85.0, 16.25], [84.75, 16.35], [84.5, 16.25], [84.25, 16.35], [84.0, 16.25], [83.47, 16.47], [83.25, 17.0], [83.35, 17.25], [83.25, 17.5], [83.47, 18.03]]]]}, "2018-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[84.47, 18.53], [85.0, 18.75], [85.25, 18.65], [85.32, 18.68], [85.47, 19.03], [85.82, 19.18], [85.97, 19.53], [86.32, 19.68], [86.47, 20.03], [87.0, 20.25], [87.5, 20.04], [88.0, 20.25], [88.53, 20.03], [88.75, 19.5], [88.53, 18.97], [88.18, 18.82], [88.03, 18.47], [87.68, 18.32], [87.53, 17.97], [87.18, 17.82], [87.03, 17.47], [86.5, 17.25], [86.25, 17.35], [86.18, 17.32], [86.03, 16.97], [85.5, 16.75], [85.25, 16.85], [85.0, 16.75], [84.47, 16.97], [84.25, 17.5], [84.35, 17.75], [84.25, 18.0], [84.47, 18.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.417949993897423}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.320332819036476}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.95210131122002, 26.94570780422572, 27.094103536792943, 27.244998534059107, 27.410411117484102, 27.574788549467257]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.96476909253323, 24.543405372217194, 24.4707214737212, 24.341969389169833, 27.23617450446983, 27.408631425061515]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5565554240017625, -1.4460213674531182, -1.3682234425114124, -1.2594855686810909, -0.8634527570837167, -0.711246155903999]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.243003633971398, -2.746691391255979, -3.417949993897423, -3.0372823275386054, -1.0290969741021172, -0.8309815434952839]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5866334607515642, -2.001101273835519, -1.8130603496376534, -1.5805925177789004, -1.6104464238428466, -1.3261877878288983]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.165468052904926, -3.2208266321256382, -2.624846669240482, -1.940879061340603, -1.9895651467460709, -1.5280374347568138]}}