{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:10.229934", "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": "2012-Aug-19_to_2012-Aug-28_309.0_-8.0"}, "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": 2012080000903}, "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": "August 19 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 28 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 10}, "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": 95134.75210865142}, "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": ["Brazil"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.South-America", "N.South-America", "South-American-Monsoon"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["South America"]}, "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": -8.0}, "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": 309.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "309.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 307.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 310.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -9.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -4.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.0, -6.25], [-49.47, -6.47], [-49.25, -7.0], [-49.47, -7.53], [-50.0, -7.75], [-50.53, -7.53], [-50.75, -7.0], [-50.53, -6.47], [-50.0, -6.25]]]]}, "2012-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-51.65, -8.25], [-51.75, -8.0], [-51.65, -7.75], [-51.75, -7.5], [-51.65, -7.25], [-51.75, -7.0], [-51.53, -6.47], [-51.0, -6.25], [-50.75, -6.35], [-50.5, -6.25], [-50.25, -6.35], [-50.0, -6.25], [-49.47, -6.47], [-49.25, -7.0], [-49.35, -7.25], [-49.25, -7.5], [-49.47, -8.03], [-49.87, -8.2], [-49.75, -8.5], [-49.85, -8.75], [-49.75, -9.0], [-49.97, -9.53], [-50.5, -9.75], [-50.75, -9.65], [-51.0, -9.75], [-51.53, -9.53], [-51.75, -9.0], [-51.65, -8.75], [-51.75, -8.5], [-51.65, -8.25]]]]}, "2012-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.53, -5.97], [-52.0, -5.75], [-51.75, -5.85], [-51.68, -5.82], [-51.65, -5.75], [-51.75, -5.5], [-51.53, -4.97], [-51.0, -4.75], [-50.47, -4.97], [-50.25, -5.5], [-50.35, -5.75], [-50.25, -6.0], [-50.35, -6.25], [-50.32, -6.32], [-50.25, -6.35], [-50.0, -6.25], [-49.47, -6.47], [-49.25, -7.0], [-49.35, -7.25], [-49.25, -7.5], [-49.47, -8.03], [-49.87, -8.2], [-49.75, -8.5], [-49.85, -8.75], [-49.75, -9.0], [-49.97, -9.53], [-50.5, -9.75], [-50.75, -9.65], [-51.0, -9.75], [-51.25, -9.65], [-51.5, -9.75], [-52.03, -9.53], [-52.25, -9.0], [-52.03, -8.47], [-51.68, -8.32], [-51.65, -8.25], [-51.68, -8.18], [-52.03, -8.03], [-52.18, -7.68], [-52.53, -7.53], [-52.75, -7.0], [-52.65, -6.75], [-52.75, -6.5], [-52.53, -5.97]]]]}, "2012-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.53, -5.97], [-52.12, -5.8], [-52.25, -5.5], [-52.03, -4.97], [-51.5, -4.75], [-51.25, -4.85], [-51.0, -4.75], [-50.57, -4.93], [-50.75, -4.5], [-50.53, -3.97], [-50.0, -3.75], [-49.47, -3.97], [-49.25, -4.5], [-49.47, -5.03], [-50.0, -5.25], [-50.43, -5.07], [-50.25, -5.5], [-50.35, -5.75], [-50.25, -6.0], [-50.35, -6.25], [-50.32, -6.32], [-50.25, -6.35], [-50.0, -6.25], [-49.47, -6.47], [-49.25, -7.0], [-49.35, -7.25], [-49.25, -7.5], [-49.47, -8.03], [-49.87, -8.2], [-49.75, -8.5], [-49.85, -8.75], [-49.75, -9.0], [-49.97, -9.53], [-50.5, -9.75], [-50.75, -9.65], [-51.0, -9.75], [-51.25, -9.65], [-51.5, -9.75], [-52.03, -9.53], [-52.25, -9.0], [-52.03, -8.47], [-51.68, -8.32], [-51.65, -8.25], [-51.68, -8.18], [-52.03, -8.03], [-52.18, -7.68], [-52.53, -7.53], [-52.75, -7.0], [-52.65, -6.75], [-52.75, -6.5], [-52.53, -5.97]]]]}, "2012-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.53, -5.97], [-52.18, -5.82], [-52.15, -5.75], [-52.25, -5.5], [-52.03, -4.97], [-51.5, -4.75], [-51.25, -4.85], [-51.0, -4.75], [-50.75, -4.85], [-50.68, -4.82], [-50.65, -4.75], [-50.75, -4.5], [-50.53, -3.97], [-50.0, -3.75], [-49.47, -3.97], [-49.25, -4.5], [-49.35, -4.75], [-49.25, -5.0], [-49.35, -5.25], [-49.25, -5.5], [-49.47, -6.03], [-50.0, -6.25], [-50.25, -6.15], [-50.32, -6.18], [-50.35, -6.25], [-50.25, -6.5], [-50.46, -7.0], [-50.25, -7.5], [-50.35, -7.75], [-50.25, -8.0], [-50.46, -8.5], [-50.25, -9.0], [-50.47, -9.53], [-51.0, -9.75], [-51.25, -9.65], [-51.5, -9.75], [-52.03, -9.53], [-52.25, -9.0], [-52.03, -8.47], [-51.62, -8.3], [-51.68, -8.18], [-52.03, -8.03], [-52.18, -7.68], [-52.53, -7.53], [-52.75, -7.0], [-52.65, -6.75], [-52.75, -6.5], [-52.53, -5.97]]]]}, "2012-08-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.53, -5.97], [-52.18, -5.82], [-52.15, -5.75], [-52.25, -5.5], [-52.03, -4.97], [-51.5, -4.75], [-51.0, -4.96], [-50.68, -4.82], [-50.65, -4.75], [-50.75, -4.5], [-50.53, -3.97], [-50.0, -3.75], [-49.47, -3.97], [-49.25, -4.5], [-49.35, -4.75], [-49.25, -5.0], [-49.35, -5.25], [-49.25, -5.5], [-49.35, -5.75], [-49.32, -5.82], [-48.97, -5.97], [-48.75, -6.5], [-48.97, -7.03], [-49.5, -7.25], [-50.0, -7.04], [-50.32, -7.18], [-50.35, -7.25], [-50.25, -7.5], [-50.35, -7.75], [-50.25, -8.0], [-50.47, -8.53], [-50.87, -8.7], [-50.75, -9.0], [-50.97, -9.53], [-51.5, -9.75], [-52.03, -9.53], [-52.25, -9.0], [-52.04, -8.5], [-52.25, -8.0], [-52.15, -7.75], [-52.18, -7.68], [-52.53, -7.53], [-52.75, -7.0], [-52.65, -6.75], [-52.75, -6.5], [-52.53, -5.97]]]]}, "2012-08-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.53, -5.97], [-52.18, -5.82], [-52.15, -5.75], [-52.18, -5.68], [-52.53, -5.53], [-52.75, -5.0], [-52.53, -4.47], [-52.0, -4.25], [-51.47, -4.47], [-51.32, -4.82], [-51.25, -4.85], [-51.18, -4.82], [-51.03, -4.47], [-50.68, -4.32], [-50.53, -3.97], [-50.0, -3.75], [-49.47, -3.97], [-49.25, -4.5], [-49.35, -4.75], [-49.25, -5.0], [-49.35, -5.25], [-49.25, -5.5], [-49.35, -5.75], [-49.32, -5.82], [-48.97, -5.97], [-48.75, -6.5], [-48.97, -7.03], [-49.5, -7.25], [-50.0, -7.04], [-50.32, -7.18], [-50.35, -7.25], [-50.25, -7.5], [-50.35, -7.75], [-50.25, -8.0], [-50.47, -8.53], [-51.0, -8.75], [-51.25, -8.65], [-51.5, -8.75], [-52.03, -8.53], [-52.25, -8.0], [-52.15, -7.75], [-52.18, -7.68], [-52.53, -7.53], [-52.75, -7.0], [-52.65, -6.75], [-52.75, -6.5], [-52.53, -5.97]]]]}, "2012-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.53, -5.97], [-52.18, -5.82], [-52.15, -5.75], [-52.18, -5.68], [-52.53, -5.53], [-52.75, -5.0], [-52.53, -4.47], [-52.0, -4.25], [-51.47, -4.47], [-51.32, -4.82], [-51.25, -4.85], [-51.18, -4.82], [-51.03, -4.47], [-50.68, -4.32], [-50.53, -3.97], [-50.0, -3.75], [-49.47, -3.97], [-49.25, -4.5], [-49.35, -4.75], [-49.25, -5.0], [-49.35, -5.25], [-49.25, -5.5], [-49.35, -5.75], [-49.32, -5.82], [-48.97, -5.97], [-48.75, -6.5], [-48.97, -7.03], [-49.5, -7.25], [-50.0, -7.04], [-50.32, -7.18], [-50.35, -7.25], [-50.25, -7.5], [-50.35, -7.75], [-50.25, -8.0], [-50.47, -8.53], [-51.0, -8.75], [-51.25, -8.65], [-51.5, -8.75], [-52.03, -8.53], [-52.25, -8.0], [-52.15, -7.75], [-52.18, -7.68], [-52.53, -7.53], [-52.75, -7.0], [-52.65, -6.75], [-52.75, -6.5], [-52.53, -5.97]]]]}, "2012-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-51.53, -8.53], [-51.75, -8.0], [-51.53, -7.47], [-51.0, -7.25], [-50.47, -7.47], [-50.25, -8.0], [-50.47, -8.53], [-51.0, -8.75], [-51.53, -8.53]]], [[[-52.53, -4.47], [-52.0, -4.25], [-51.47, -4.47], [-51.32, -4.82], [-51.25, -4.85], [-51.18, -4.82], [-51.03, -4.47], [-50.68, -4.32], [-50.53, -3.97], [-50.0, -3.75], [-49.47, -3.97], [-49.25, -4.5], [-49.35, -4.75], [-49.25, -5.0], [-49.47, -5.53], [-49.82, -5.68], [-49.97, -6.03], [-50.5, -6.25], [-50.75, -6.15], [-51.0, -6.25], [-51.25, -6.15], [-51.5, -6.25], [-52.03, -6.03], [-52.18, -5.68], [-52.53, -5.53], [-52.75, -5.0], [-52.53, -4.47]]]]}, "2012-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-50.53, -3.97], [-50.0, -3.75], [-49.47, -3.97], [-49.25, -4.5], [-49.35, -4.75], [-49.25, -5.0], [-49.47, -5.53], [-50.0, -5.75], [-50.53, -5.53], [-50.75, -5.0], [-50.65, -4.75], [-50.75, -4.5], [-50.53, -3.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.453721740620608}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6143155716787962}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.32411422266142, 25.548816498489714, 25.28010774280341, 25.588547885576645, 25.638920362391502, 25.852659150423506, 25.518625983187633, 25.257993899467465, 26.03389582323888, 26.14071521400075]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.32411422266142, 24.893793821253098, 24.64420099254596, 24.737881723374187, 24.87769374908055, 25.22180150924669, 24.846244385302953, 24.681239500549225, 25.7511018094296, 25.85854685066448]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.907012706132889, -1.5734188980218846, -1.8140319555618618, -1.5870507963296225, -1.4692330489932348, -1.3232010344562888, -1.6961037339382923, -1.9704895634968667, -1.2761665210856137, -1.3867492593556676]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.907012706132889, -1.9010550668504038, -2.1747736431615294, -2.1883789039837893, -1.7278899697103611, -1.604499422408935, -2.19322247533637, -2.453721740620608, -1.4412763161715247, -1.4879798184078368]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1720800660341109, -1.6663891564945819, -1.9250963690790734, -1.7315225467757687, -1.6613806135953562, -1.5330161506927105, -1.9661719965770943, -2.2677032699199042, -1.4621267537444134, -1.7522869921803637]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.1720800660341109, -2.0969891481129768, -2.6095698032383923, -2.258588873454525, -1.914915850330196, -1.7709720911204592, -2.4806537198454746, -3.039898151212763, -1.5999532799380176, -1.8169956764824493]}}