{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:30.123071", "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": "2015-Mar-17_to_2015-Mar-28_86.5_29.0"}, "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": 2015030000682}, "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": "March 17 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 28 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 12}, "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": 151702.18557773856}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau"]}, "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": 29.0}, "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": 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": 79.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 87.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 33.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[78.97, 31.97], [78.75, 32.5], [78.97, 33.03], [79.5, 33.25], [80.0, 33.04], [80.32, 33.18], [80.47, 33.53], [81.0, 33.75], [81.53, 33.53], [81.7, 33.13], [82.0, 33.25], [82.53, 33.03], [82.68, 32.68], [82.75, 32.65], [83.0, 32.75], [83.25, 32.65], [83.5, 32.75], [84.03, 32.53], [84.18, 32.18], [84.53, 32.03], [84.75, 31.5], [84.65, 31.25], [84.68, 31.18], [84.75, 31.15], [85.0, 31.25], [85.25, 31.15], [85.5, 31.25], [86.03, 31.03], [86.18, 30.68], [86.25, 30.65], [86.5, 30.75], [87.03, 30.53], [87.18, 30.18], [87.53, 30.03], [87.75, 29.5], [87.65, 29.25], [87.68, 29.18], [88.03, 29.03], [88.25, 28.5], [88.03, 27.97], [87.5, 27.75], [87.25, 27.85], [87.0, 27.75], [86.47, 27.97], [86.32, 28.32], [85.97, 28.47], [85.82, 28.82], [85.47, 28.97], [85.32, 29.32], [85.25, 29.35], [85.0, 29.25], [84.7, 29.38], [84.53, 28.97], [84.0, 28.75], [83.47, 28.97], [83.32, 29.32], [82.97, 29.47], [82.82, 29.82], [82.47, 29.97], [82.32, 30.32], [82.0, 30.46], [81.5, 30.25], [81.25, 30.35], [81.0, 30.25], [80.47, 30.47], [80.25, 31.0], [80.35, 31.25], [80.25, 31.5], [80.35, 31.75], [80.32, 31.82], [80.0, 31.96], [79.5, 31.75], [78.97, 31.97]]]]}, "2015-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[78.97, 31.97], [78.75, 32.5], [78.97, 33.03], [79.5, 33.25], [79.75, 33.15], [79.82, 33.18], [79.97, 33.53], [80.5, 33.75], [80.75, 33.65], [81.0, 33.75], [81.53, 33.53], [81.7, 33.13], [82.0, 33.25], [82.53, 33.03], [82.68, 32.68], [82.75, 32.65], [83.0, 32.75], [83.25, 32.65], [83.5, 32.75], [84.03, 32.53], [84.18, 32.18], [84.53, 32.03], [84.75, 31.5], [84.65, 31.25], [84.68, 31.18], [84.75, 31.15], [85.0, 31.25], [85.25, 31.15], [85.5, 31.25], [86.03, 31.03], [86.18, 30.68], [86.25, 30.65], [86.5, 30.75], [87.03, 30.53], [87.18, 30.18], [87.53, 30.03], [87.68, 29.68], [88.03, 29.53], [88.25, 29.0], [88.15, 28.75], [88.25, 28.5], [88.03, 27.97], [87.5, 27.75], [87.25, 27.85], [87.0, 27.75], [86.47, 27.97], [86.32, 28.32], [85.97, 28.47], [85.82, 28.82], [85.47, 28.97], [85.32, 29.32], [85.25, 29.35], [85.0, 29.25], [84.7, 29.38], [84.53, 28.97], [84.0, 28.75], [83.47, 28.97], [83.32, 29.32], [82.97, 29.47], [82.82, 29.82], [82.47, 29.97], [82.32, 30.32], [82.0, 30.46], [81.5, 30.25], [81.25, 30.35], [81.0, 30.25], [80.47, 30.47], [80.25, 31.0], [80.35, 31.25], [80.25, 31.5], [80.35, 31.75], [80.32, 31.82], [80.25, 31.85], [80.0, 31.75], [79.75, 31.85], [79.5, 31.75], [78.97, 31.97]]]]}, "2015-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[78.97, 31.97], [78.75, 32.5], [78.97, 33.03], [79.5, 33.25], [79.75, 33.15], [79.82, 33.18], [79.97, 33.53], [80.5, 33.75], [80.75, 33.65], [81.0, 33.75], [81.53, 33.53], [81.7, 33.13], [82.0, 33.25], [82.53, 33.03], [82.68, 32.68], [82.75, 32.65], [83.0, 32.75], [83.25, 32.65], [83.5, 32.75], [84.03, 32.53], [84.18, 32.18], [84.53, 32.03], [84.75, 31.5], [84.65, 31.25], [84.68, 31.18], [84.75, 31.15], [85.0, 31.25], [85.25, 31.15], [85.5, 31.25], [86.03, 31.03], [86.18, 30.68], [86.25, 30.65], [86.5, 30.75], [87.03, 30.53], [87.18, 30.18], [87.53, 30.03], [87.68, 29.68], [88.03, 29.53], [88.25, 29.0], [88.15, 28.75], [88.25, 28.5], [88.03, 27.97], [87.5, 27.75], [87.25, 27.85], [87.0, 27.75], [86.75, 27.85], [86.5, 27.75], [86.25, 27.85], [86.0, 27.75], [85.47, 27.97], [85.3, 28.38], [85.0, 28.25], [84.75, 28.35], [84.5, 28.25], [83.97, 28.47], [83.82, 28.82], [83.47, 28.97], [83.32, 29.32], [83.25, 29.35], [83.0, 29.25], [82.47, 29.47], [82.25, 30.0], [82.35, 30.25], [82.32, 30.32], [82.0, 30.46], [81.5, 30.25], [81.25, 30.35], [81.0, 30.25], [80.47, 30.47], [80.25, 31.0], [80.35, 31.25], [80.25, 31.5], [80.35, 31.75], [80.32, 31.82], [80.25, 31.85], [80.0, 31.75], [79.75, 31.85], [79.5, 31.75], [78.97, 31.97]]]]}, "2015-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.5, 33.75], [81.03, 33.53], [81.25, 33.0], [81.15, 32.75], [81.18, 32.68], [81.25, 32.65], [81.5, 32.75], [81.75, 32.65], [82.0, 32.75], [82.5, 32.54], [83.0, 32.75], [83.53, 32.53], [83.68, 32.18], [84.03, 32.03], [84.25, 31.5], [84.15, 31.25], [84.2, 31.13], [84.5, 31.25], [84.75, 31.15], [85.0, 31.25], [85.53, 31.03], [85.68, 30.68], [85.75, 30.65], [86.0, 30.75], [86.53, 30.53], [86.68, 30.18], [86.75, 30.15], [87.0, 30.25], [87.53, 30.03], [87.68, 29.68], [88.03, 29.53], [88.25, 29.0], [88.15, 28.75], [88.25, 28.5], [88.15, 28.25], [88.25, 28.0], [88.03, 27.47], [87.5, 27.25], [86.97, 27.47], [86.82, 27.82], [86.75, 27.85], [86.5, 27.75], [86.25, 27.85], [86.0, 27.75], [85.47, 27.97], [85.32, 28.32], [85.25, 28.35], [85.0, 28.25], [84.75, 28.35], [84.5, 28.25], [83.97, 28.47], [83.82, 28.82], [83.47, 28.97], [83.32, 29.32], [83.25, 29.35], [83.0, 29.25], [82.47, 29.47], [82.25, 30.0], [82.35, 30.25], [82.25, 30.5], [82.35, 30.75], [82.32, 30.82], [82.25, 30.85], [82.0, 30.75], [81.75, 30.85], [81.5, 30.75], [80.97, 30.97], [80.82, 31.32], [80.47, 31.47], [80.32, 31.82], [80.25, 31.85], [80.0, 31.75], [79.47, 31.97], [79.25, 32.5], [79.47, 33.03], [79.82, 33.18], [79.97, 33.53], [80.5, 33.75]]]]}, "2015-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[79.47, 31.97], [79.25, 32.5], [79.47, 33.03], [80.0, 33.25], [80.25, 33.15], [80.5, 33.25], [81.03, 33.03], [81.18, 32.68], [81.25, 32.65], [81.5, 32.75], [82.03, 32.53], [82.18, 32.18], [82.25, 32.15], [82.5, 32.25], [83.03, 32.03], [83.18, 31.68], [83.53, 31.53], [83.75, 31.0], [83.65, 30.75], [83.68, 30.68], [83.75, 30.65], [83.82, 30.68], [83.97, 31.03], [84.5, 31.25], [85.03, 31.03], [85.2, 30.63], [85.5, 30.75], [86.03, 30.53], [86.18, 30.18], [86.25, 30.15], [86.5, 30.25], [86.75, 30.15], [87.0, 30.25], [87.53, 30.03], [87.75, 29.5], [87.65, 29.25], [87.68, 29.18], [88.03, 29.03], [88.25, 28.5], [88.15, 28.25], [88.25, 28.0], [88.03, 27.47], [87.5, 27.25], [86.97, 27.47], [86.82, 27.82], [86.75, 27.85], [86.5, 27.75], [86.25, 27.85], [86.0, 27.75], [85.47, 27.97], [85.32, 28.32], [85.25, 28.35], [85.0, 28.25], [84.75, 28.35], [84.5, 28.25], [83.97, 28.47], [83.82, 28.82], [83.47, 28.97], [83.32, 29.32], [83.25, 29.35], [83.0, 29.25], [82.47, 29.47], [82.25, 30.0], [82.35, 30.25], [82.25, 30.5], [82.35, 30.75], [82.32, 30.82], [82.25, 30.85], [82.0, 30.75], [81.75, 30.85], [81.5, 30.75], [80.97, 30.97], [80.82, 31.32], [80.47, 31.47], [80.32, 31.82], [80.25, 31.85], [80.0, 31.75], [79.47, 31.97]]]]}, "2015-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[82.25, 30.0], [82.47, 30.53], [83.0, 30.75], [83.25, 30.65], [83.5, 30.75], [83.8, 30.63], [83.97, 31.03], [84.5, 31.25], [85.03, 31.03], [85.25, 30.5], [85.04, 30.0], [85.2, 29.63], [85.5, 29.75], [85.75, 29.65], [85.82, 29.68], [85.97, 30.03], [86.5, 30.25], [87.03, 30.03], [87.18, 29.68], [87.53, 29.53], [87.68, 29.18], [88.03, 29.03], [88.25, 28.5], [88.15, 28.25], [88.25, 28.0], [88.03, 27.47], [87.5, 27.25], [86.97, 27.47], [86.82, 27.82], [86.47, 27.97], [86.32, 28.32], [86.25, 28.35], [86.0, 28.25], [85.75, 28.35], [85.5, 28.25], [84.97, 28.47], [84.8, 28.88], [84.5, 28.75], [84.25, 28.85], [84.0, 28.75], [83.47, 28.97], [83.32, 29.32], [83.25, 29.35], [83.0, 29.25], [82.47, 29.47], [82.25, 30.0]]], [[[81.25, 31.5], [81.47, 32.03], [82.0, 32.25], [82.53, 32.03], [82.75, 31.5], [82.53, 30.97], [82.0, 30.75], [81.47, 30.97], [81.25, 31.5]]], [[[79.75, 32.5], [79.97, 33.03], [80.5, 33.25], [81.03, 33.03], [81.25, 32.5], [81.03, 31.97], [80.5, 31.75], [79.97, 31.97], [79.75, 32.5]]]]}, "2015-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[86.5, 30.25], [87.03, 30.03], [87.18, 29.68], [87.53, 29.53], [87.75, 29.0], [87.65, 28.75], [87.75, 28.5], [87.53, 27.97], [87.0, 27.75], [86.47, 27.97], [86.32, 28.32], [85.97, 28.47], [85.75, 29.0], [85.85, 29.25], [85.75, 29.5], [85.97, 30.03], [86.5, 30.25]]], [[[82.75, 30.0], [82.97, 30.53], [83.5, 30.75], [84.03, 30.53], [84.25, 30.0], [84.03, 29.47], [83.5, 29.25], [82.97, 29.47], [82.75, 30.0]]], [[[79.75, 32.5], [79.97, 33.03], [80.5, 33.25], [81.03, 33.03], [81.25, 32.5], [81.03, 31.97], [80.5, 31.75], [79.97, 31.97], [79.75, 32.5]]]]}, "2015-03-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.75, 29.0], [85.97, 29.53], [86.5, 29.75], [86.75, 29.65], [87.0, 29.75], [87.53, 29.53], [87.75, 29.0], [87.65, 28.75], [87.75, 28.5], [87.53, 27.97], [87.0, 27.75], [86.47, 27.97], [86.32, 28.32], [85.97, 28.47], [85.75, 29.0]]]]}, "2015-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.75, 29.0], [85.97, 29.53], [86.5, 29.75], [86.75, 29.65], [87.0, 29.75], [87.53, 29.53], [87.75, 29.0], [87.65, 28.75], [87.75, 28.5], [87.53, 27.97], [87.0, 27.75], [86.47, 27.97], [86.32, 28.32], [85.97, 28.47], [85.75, 29.0]]]]}, "2015-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.75, 29.0], [85.97, 29.53], [86.5, 29.75], [86.75, 29.65], [87.0, 29.75], [87.53, 29.53], [87.75, 29.0], [87.65, 28.75], [87.75, 28.5], [87.53, 27.97], [87.0, 27.75], [86.47, 27.97], [86.32, 28.32], [85.97, 28.47], [85.75, 29.0]]]]}, "2015-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[85.97, 28.47], [85.75, 29.0], [85.97, 29.53], [86.5, 29.75], [86.75, 29.65], [87.0, 29.75], [87.53, 29.53], [87.75, 29.0], [87.53, 28.47], [87.0, 28.25], [86.75, 28.35], [86.5, 28.25], [85.97, 28.47]]]]}, "2015-03-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[86.5, 29.75], [87.03, 29.53], [87.25, 29.0], [87.03, 28.47], [86.5, 28.25], [85.97, 28.47], [85.75, 29.0], [85.97, 29.53], [86.5, 29.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.248768732333446}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.520896765365121}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-17.06707804312947, -16.870496298951593, -18.37566553531309, -16.51908396256175, -16.36691897792838, -14.884233386886194, -12.01722339970479, -10.804076719939587, -9.623995969432656, -9.494392443700747, -9.878591193921125, -11.801872212309775]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-23.415919371071624, -22.99212852134471, -23.815395575073325, -20.545672403447043, -21.579417770785284, -18.49839415033975, -15.290725534674948, -14.989402931208303, -12.940931321255619, -12.874028753109712, -12.72001113524874, -11.801872212309775]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.138183715394448, -6.340521312638083, -7.829866372930075, -6.359988213024033, -6.2084846907340525, -6.093618580615416, -5.170578934110267, -5.7466241804369815, -4.830877569445495, -4.990013940263641, -4.841802511770425, -5.328549491108447]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.703452308415564, -10.514593353323875, -12.248768732333446, -10.507365160006117, -9.417920763120492, -8.454156122451138, -7.559056905773048, -7.494555654837711, -5.7232057299830785, -5.959288254752494, -6.046036837565964, -5.328549491108447]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.747193021622658, -1.8114731693900128, -2.183584973758787, -1.7212666212907746, -1.6455287657700721, -1.6483634428127663, -1.5199131671393442, -1.7934063790829413, -1.5391333700378045, -1.6705815401947366, -1.6944294910963844, -1.6989088421952014]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5954992287240732, -2.6462688890518056, -3.3457310600875414, -2.6758195489644305, -2.3588960418829488, -2.101783224744425, -1.9820556319056974, -2.054153256885175, -1.6479996156795735, -1.7586084948808502, -1.8813561137065253, -1.6989088421952014]}}