{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:37.635902", "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": "2017-Apr-06_to_2017-Apr-12_74.5_35.0"}, "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": 2017040000231}, "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 06 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2017"}, "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": 169656.76724407007}, "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", "India", "Pakistan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau", "W.C.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": []}, "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": 35.0}, "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": 74.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "74.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 73.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 82.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 35.03], [74.0, 35.25], [74.25, 35.15], [74.5, 35.25], [75.03, 35.03], [75.25, 34.5], [75.15, 34.25], [75.25, 34.0], [75.03, 33.47], [74.5, 33.25], [73.97, 33.47], [73.82, 33.82], [73.47, 33.97], [73.25, 34.5], [73.47, 35.03]]], [[[77.75, 37.0], [77.97, 37.53], [78.5, 37.75], [78.75, 37.65], [79.0, 37.75], [79.25, 37.65], [79.5, 37.75], [79.75, 37.65], [80.0, 37.75], [80.25, 37.65], [80.5, 37.75], [80.75, 37.65], [81.0, 37.75], [81.5, 37.54], [82.0, 37.75], [82.53, 37.53], [82.75, 37.0], [82.53, 36.47], [82.18, 36.32], [82.03, 35.97], [81.5, 35.75], [81.25, 35.85], [81.0, 35.75], [80.75, 35.85], [80.5, 35.75], [80.25, 35.85], [80.0, 35.75], [79.47, 35.97], [79.32, 36.32], [79.25, 36.35], [79.0, 36.25], [78.75, 36.35], [78.5, 36.25], [77.97, 36.47], [77.75, 37.0]]]]}, "2017-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.97, 35.53], [73.5, 35.75], [73.75, 35.65], [74.0, 35.75], [74.25, 35.65], [74.5, 35.75], [75.03, 35.53], [75.25, 35.0], [75.15, 34.75], [75.25, 34.5], [75.15, 34.25], [75.25, 34.0], [75.03, 33.47], [74.5, 33.25], [73.97, 33.47], [73.82, 33.82], [73.47, 33.97], [73.32, 34.32], [72.97, 34.47], [72.75, 35.0], [72.97, 35.53]]], [[[77.75, 37.0], [77.97, 37.53], [78.5, 37.75], [78.75, 37.65], [79.0, 37.75], [79.25, 37.65], [79.5, 37.75], [79.75, 37.65], [80.0, 37.75], [80.25, 37.65], [80.5, 37.75], [80.75, 37.65], [81.0, 37.75], [81.5, 37.54], [82.0, 37.75], [82.53, 37.53], [82.75, 37.0], [82.65, 36.75], [82.75, 36.5], [82.53, 35.97], [82.0, 35.75], [81.75, 35.85], [81.5, 35.75], [81.25, 35.85], [81.0, 35.75], [80.75, 35.85], [80.5, 35.75], [80.25, 35.85], [80.0, 35.75], [79.47, 35.97], [79.32, 36.32], [79.25, 36.35], [79.0, 36.25], [78.75, 36.35], [78.5, 36.25], [77.97, 36.47], [77.75, 37.0]]]]}, "2017-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[78.25, 32.5], [78.47, 33.03], [79.0, 33.25], [79.25, 33.15], [79.5, 33.25], [80.03, 33.03], [80.25, 32.5], [80.03, 31.97], [79.5, 31.75], [79.25, 31.85], [79.0, 31.75], [78.47, 31.97], [78.25, 32.5]]], [[[73.5, 35.75], [73.75, 35.65], [74.0, 35.75], [74.25, 35.65], [74.5, 35.75], [75.03, 35.53], [75.25, 35.0], [75.15, 34.75], [75.25, 34.5], [75.15, 34.25], [75.25, 34.0], [75.03, 33.47], [74.5, 33.25], [73.97, 33.47], [73.82, 33.82], [73.47, 33.97], [73.32, 34.32], [72.97, 34.47], [72.75, 35.0], [72.97, 35.53], [73.5, 35.75]]], [[[77.97, 37.53], [78.5, 37.75], [78.75, 37.65], [79.0, 37.75], [79.25, 37.65], [79.5, 37.75], [79.75, 37.65], [80.0, 37.75], [80.25, 37.65], [80.5, 37.75], [80.75, 37.65], [81.0, 37.75], [81.5, 37.54], [82.0, 37.75], [82.53, 37.53], [82.75, 37.0], [82.65, 36.75], [82.75, 36.5], [82.53, 35.97], [82.0, 35.75], [81.75, 35.85], [81.5, 35.75], [81.25, 35.85], [81.0, 35.75], [80.75, 35.85], [80.5, 35.75], [80.25, 35.85], [80.0, 35.75], [79.75, 35.85], [79.5, 35.75], [78.97, 35.97], [78.82, 36.32], [78.75, 36.35], [78.5, 36.25], [77.97, 36.47], [77.75, 37.0], [77.97, 37.53]]]]}, "2017-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.97, 34.47], [72.75, 35.0], [72.97, 35.53], [73.5, 35.75], [73.75, 35.65], [74.0, 35.75], [74.25, 35.65], [74.5, 35.75], [74.75, 35.65], [75.0, 35.75], [75.25, 35.65], [75.5, 35.75], [76.03, 35.53], [76.2, 35.13], [76.5, 35.25], [76.75, 35.15], [77.0, 35.25], [76.47, 35.47], [76.25, 36.0], [76.35, 36.25], [76.25, 36.5], [76.47, 37.03], [77.0, 37.25], [77.25, 37.15], [77.5, 37.25], [77.75, 37.15], [77.82, 37.18], [77.97, 37.53], [78.5, 37.75], [79.03, 37.53], [79.18, 37.18], [79.25, 37.15], [79.5, 37.25], [80.0, 37.04], [80.5, 37.25], [80.75, 37.15], [81.0, 37.25], [81.25, 37.15], [81.5, 37.25], [81.75, 37.15], [82.0, 37.25], [82.53, 37.03], [82.75, 36.5], [82.53, 35.97], [82.0, 35.75], [81.75, 35.85], [81.68, 35.82], [81.53, 35.47], [81.0, 35.25], [80.75, 35.35], [80.5, 35.25], [80.07, 35.43], [80.25, 35.0], [80.07, 34.57], [80.5, 34.75], [81.03, 34.53], [81.25, 34.0], [81.03, 33.47], [80.68, 33.32], [80.53, 32.97], [80.18, 32.82], [80.15, 32.75], [80.18, 32.68], [80.53, 32.53], [80.75, 32.0], [80.65, 31.75], [80.75, 31.5], [80.53, 30.97], [80.0, 30.75], [79.47, 30.97], [79.32, 31.32], [78.97, 31.47], [78.82, 31.82], [78.47, 31.97], [78.32, 32.32], [77.97, 32.47], [77.82, 32.82], [77.75, 32.85], [77.5, 32.75], [77.25, 32.85], [77.0, 32.75], [76.47, 32.97], [76.25, 33.5], [76.35, 33.75], [76.32, 33.82], [75.97, 33.97], [75.8, 34.38], [75.68, 34.32], [75.53, 33.97], [75.0, 33.75], [74.47, 33.97], [74.32, 34.32], [74.25, 34.35], [74.0, 34.25], [73.75, 34.35], [73.5, 34.25], [72.97, 34.47]], [[77.53, 35.03], [77.68, 34.68], [77.75, 34.65], [77.82, 34.68], [77.96, 35.0], [77.82, 35.32], [77.75, 35.35], [77.5, 35.25], [77.25, 35.35], [77.0, 35.25], [77.53, 35.03]], [[79.93, 35.57], [79.8, 35.88], [79.5, 35.75], [79.93, 35.57]], [[79.25, 35.85], [79.18, 35.82], [79.15, 35.75], [79.18, 35.68], [79.25, 35.65], [79.5, 35.75], [79.25, 35.85]]]]}, "2017-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 34.47], [73.25, 35.0], [73.47, 35.53], [74.0, 35.75], [74.25, 35.65], [74.5, 35.75], [74.75, 35.65], [75.0, 35.75], [75.25, 35.65], [75.5, 35.75], [75.75, 35.65], [76.0, 35.75], [76.25, 35.65], [76.38, 35.7], [76.32, 35.82], [75.97, 35.97], [75.75, 36.5], [75.97, 37.03], [76.5, 37.25], [76.75, 37.15], [77.0, 37.25], [77.25, 37.15], [77.5, 37.25], [77.75, 37.15], [77.82, 37.18], [77.97, 37.53], [78.5, 37.75], [79.03, 37.53], [79.18, 37.18], [79.25, 37.15], [79.5, 37.25], [80.03, 37.03], [80.2, 36.63], [80.5, 36.75], [80.75, 36.65], [80.82, 36.68], [80.97, 37.03], [81.5, 37.25], [81.75, 37.15], [82.0, 37.25], [82.53, 37.03], [82.75, 36.5], [82.53, 35.97], [82.0, 35.75], [81.75, 35.85], [81.68, 35.82], [81.53, 35.47], [81.0, 35.25], [80.75, 35.35], [80.5, 35.25], [80.07, 35.43], [80.25, 35.0], [80.07, 34.57], [80.5, 34.75], [81.03, 34.53], [81.25, 34.0], [81.03, 33.47], [80.68, 33.32], [80.53, 32.97], [80.18, 32.82], [80.15, 32.75], [80.18, 32.68], [80.53, 32.53], [80.75, 32.0], [80.65, 31.75], [80.75, 31.5], [80.53, 30.97], [80.0, 30.75], [79.47, 30.97], [79.32, 31.32], [78.97, 31.47], [78.82, 31.82], [78.47, 31.97], [78.32, 32.32], [77.97, 32.47], [77.82, 32.82], [77.75, 32.85], [77.5, 32.75], [77.25, 32.85], [77.0, 32.75], [76.47, 32.97], [76.25, 33.5], [76.35, 33.75], [76.32, 33.82], [75.97, 33.97], [75.82, 34.32], [75.75, 34.35], [75.68, 34.32], [75.53, 33.97], [75.0, 33.75], [74.47, 33.97], [74.32, 34.32], [74.25, 34.35], [74.0, 34.25], [73.47, 34.47]], [[79.93, 35.57], [79.8, 35.88], [79.5, 35.75], [79.93, 35.57]], [[79.25, 35.85], [79.18, 35.82], [79.15, 35.75], [79.18, 35.68], [79.25, 35.65], [79.5, 35.75], [79.25, 35.85]], [[77.32, 35.18], [77.35, 35.25], [77.32, 35.32], [77.25, 35.35], [77.13, 35.3], [77.18, 35.18], [77.25, 35.15], [77.32, 35.18]]]]}, "2017-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[73.47, 34.47], [73.25, 35.0], [73.47, 35.53], [74.0, 35.75], [74.25, 35.65], [74.5, 35.75], [74.75, 35.65], [75.0, 35.75], [75.25, 35.65], [75.5, 35.75], [75.75, 35.65], [76.0, 35.75], [76.25, 35.65], [76.38, 35.7], [76.32, 35.82], [75.97, 35.97], [75.75, 36.5], [75.97, 37.03], [76.5, 37.25], [76.75, 37.15], [77.0, 37.25], [77.25, 37.15], [77.5, 37.25], [77.75, 37.15], [78.0, 37.25], [78.25, 37.15], [78.5, 37.25], [78.75, 37.15], [79.0, 37.25], [79.53, 37.03], [79.75, 36.5], [79.53, 35.97], [79.18, 35.82], [79.15, 35.75], [79.18, 35.68], [79.25, 35.65], [79.5, 35.75], [79.93, 35.57], [79.75, 36.0], [79.97, 36.53], [80.5, 36.75], [80.75, 36.65], [81.0, 36.75], [81.53, 36.53], [81.75, 36.0], [81.53, 35.47], [81.0, 35.25], [80.75, 35.35], [80.5, 35.25], [80.07, 35.43], [80.25, 35.0], [80.07, 34.57], [80.5, 34.75], [81.03, 34.53], [81.25, 34.0], [81.03, 33.47], [80.68, 33.32], [80.53, 32.97], [80.18, 32.82], [80.13, 32.7], [80.53, 32.53], [80.75, 32.0], [80.65, 31.75], [80.75, 31.5], [80.53, 30.97], [80.0, 30.75], [79.47, 30.97], [79.32, 31.32], [78.97, 31.47], [78.75, 32.0], [78.93, 32.43], [78.5, 32.25], [77.97, 32.47], [77.82, 32.82], [77.75, 32.85], [77.5, 32.75], [77.25, 32.85], [77.0, 32.75], [76.47, 32.97], [76.25, 33.5], [76.35, 33.75], [76.32, 33.82], [75.97, 33.97], [75.82, 34.32], [75.75, 34.35], [75.68, 34.32], [75.53, 33.97], [75.0, 33.75], [74.47, 33.97], [74.32, 34.32], [74.25, 34.35], [74.0, 34.25], [73.47, 34.47]], [[77.32, 35.18], [77.35, 35.25], [77.32, 35.32], [77.25, 35.35], [77.13, 35.3], [77.18, 35.18], [77.25, 35.15], [77.32, 35.18]]]]}, "2017-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[78.97, 31.47], [78.75, 32.0], [78.97, 32.53], [79.5, 32.75], [80.03, 32.53], [80.25, 32.0], [80.03, 31.47], [79.5, 31.25], [78.97, 31.47]]], [[[74.25, 35.0], [74.47, 35.53], [75.0, 35.75], [75.5, 35.54], [76.0, 35.75], [76.25, 35.65], [76.5, 35.75], [75.97, 35.97], [75.75, 36.5], [75.97, 37.03], [76.5, 37.25], [76.75, 37.15], [77.0, 37.25], [77.5, 37.04], [78.0, 37.25], [78.53, 37.03], [78.75, 36.5], [78.65, 36.25], [78.68, 36.18], [79.03, 36.03], [79.18, 35.68], [79.53, 35.53], [79.75, 35.0], [79.53, 34.47], [79.0, 34.25], [78.57, 34.43], [78.75, 34.0], [78.65, 33.75], [78.75, 33.5], [78.53, 32.97], [78.0, 32.75], [77.75, 32.85], [77.5, 32.75], [77.25, 32.85], [77.0, 32.75], [76.47, 32.97], [76.25, 33.5], [76.35, 33.75], [76.32, 33.82], [75.97, 33.97], [75.82, 34.32], [75.5, 34.46], [75.0, 34.25], [74.47, 34.47], [74.25, 35.0]], [[76.93, 35.57], [76.82, 35.82], [76.75, 35.85], [76.5, 35.75], [76.93, 35.57]], [[77.35, 35.25], [77.32, 35.32], [77.07, 35.43], [77.18, 35.18], [77.25, 35.15], [77.32, 35.18], [77.35, 35.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.650096322161033}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.014683764061675}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.634667916599142, 0.6158681719578567, -1.101870740063248, -14.646890741765958, -17.000610763774887, -16.592771338570742, -16.90532822223946]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-3.8421923135728093, -10.03983571715355, -16.890225058301553, -23.34336305221416, -25.716977447958612, -24.01937894317595, -23.050509897248844]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.720454840347783, -6.170455808956872, -5.901951100123426, -5.802514144348763, -6.990366450253617, -5.502534775188038, -4.760121540584956]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.006794961155038, -8.385269609656461, -8.079019187465974, -8.176448906225943, -11.650096322161033, -8.937242575002529, -6.9699031772638875]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.906691042745985, -1.8159853966019566, -1.7483571262732975, -1.8161402875919053, -2.227899548440762, -1.7507467112537691, -1.5205849555138755]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.150274167680315, -2.052271603534676, -2.303583385271164, -2.425327860945772, -3.070956737919511, -2.2610229476979544, -1.8122794932290383]}}