{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:20.215635", "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-Feb-28_to_2015-Mar-10_152.0_-4.5"}, "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": 2015020001136}, "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": "February 28 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 10 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 11}, "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": 61513.80852713142}, "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": ["Papua New Guinea"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Equatorial.Pacific-Ocean"]}, "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": ["Bismarck Sea", "Solomon Sea"]}, "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": -4.5}, "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": 152.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "152.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 151.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 155.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -6.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -3.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[152.0, -4.25], [152.53, -4.47], [152.75, -5.0], [152.53, -5.53], [152.0, -5.75], [151.47, -5.53], [151.25, -5.0], [151.47, -4.47], [152.0, -4.25]]]]}, "2015-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[150.97, -5.47], [151.32, -5.32], [151.35, -5.25], [151.25, -5.0], [151.47, -4.47], [152.0, -4.25], [152.25, -4.35], [152.5, -4.25], [153.03, -4.47], [153.18, -4.82], [153.53, -4.97], [153.68, -5.32], [153.75, -5.35], [154.0, -5.25], [154.53, -5.47], [154.75, -6.0], [154.53, -6.53], [154.0, -6.75], [153.75, -6.65], [153.68, -6.68], [153.53, -7.03], [153.0, -7.25], [152.47, -7.03], [152.32, -6.68], [152.25, -6.65], [152.18, -6.68], [152.03, -7.03], [151.5, -7.25], [150.97, -7.03], [150.75, -6.5], [150.85, -6.25], [150.75, -6.0], [150.97, -5.47]]]]}, "2015-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[150.97, -5.47], [151.32, -5.32], [151.35, -5.25], [151.25, -5.0], [151.47, -4.47], [152.0, -4.25], [152.25, -4.35], [152.5, -4.25], [153.03, -4.47], [153.18, -4.82], [153.53, -4.97], [153.68, -5.32], [153.75, -5.35], [154.0, -5.25], [154.53, -5.47], [154.75, -6.0], [154.53, -6.53], [154.0, -6.75], [153.75, -6.65], [153.68, -6.68], [153.53, -7.03], [153.0, -7.25], [152.47, -7.03], [152.32, -6.68], [152.25, -6.65], [152.18, -6.68], [152.03, -7.03], [151.5, -7.25], [150.97, -7.03], [150.75, -6.5], [150.85, -6.25], [150.75, -6.0], [150.97, -5.47]]]]}, "2015-03-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[150.97, -5.47], [151.32, -5.32], [151.35, -5.25], [151.32, -5.18], [150.97, -5.03], [150.75, -4.5], [150.97, -3.97], [151.5, -3.75], [152.03, -3.97], [152.18, -4.32], [152.25, -4.35], [152.5, -4.25], [153.03, -4.47], [153.18, -4.82], [153.53, -4.97], [153.68, -5.32], [153.75, -5.35], [154.0, -5.25], [154.53, -5.47], [154.75, -6.0], [154.53, -6.53], [154.0, -6.75], [153.75, -6.65], [153.68, -6.68], [153.53, -7.03], [153.0, -7.25], [152.47, -7.03], [152.32, -6.68], [152.25, -6.65], [152.18, -6.68], [152.03, -7.03], [151.5, -7.25], [150.97, -7.03], [150.75, -6.5], [150.85, -6.25], [150.75, -6.0], [150.97, -5.47]]]]}, "2015-03-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[153.25, -6.0], [153.47, -5.47], [154.0, -5.25], [154.25, -5.35], [154.5, -5.25], [155.03, -5.47], [155.18, -5.82], [155.53, -5.97], [155.75, -6.5], [155.53, -7.03], [155.0, -7.25], [154.47, -7.03], [154.32, -6.68], [154.25, -6.65], [154.0, -6.75], [153.47, -6.53], [153.25, -6.0]]], [[[150.97, -3.97], [151.5, -3.75], [152.03, -3.97], [152.25, -4.5], [152.13, -4.8], [152.53, -4.97], [152.75, -5.5], [152.53, -6.03], [152.0, -6.25], [151.47, -6.03], [151.25, -5.5], [151.38, -5.2], [150.97, -5.03], [150.75, -4.5], [150.97, -3.97]]]]}, "2015-03-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[153.97, -5.47], [154.5, -5.25], [155.03, -5.47], [155.18, -5.82], [155.53, -5.97], [155.75, -6.5], [155.53, -7.03], [155.0, -7.25], [154.47, -7.03], [154.32, -6.68], [153.97, -6.53], [153.75, -6.0], [153.97, -5.47]]], [[[150.97, -5.03], [150.75, -4.5], [150.97, -3.97], [151.5, -3.75], [152.03, -3.97], [152.25, -4.5], [152.03, -5.03], [151.5, -5.25], [150.97, -5.03]]]]}, "2015-03-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[153.97, -5.47], [154.5, -5.25], [154.75, -5.35], [155.0, -5.25], [155.53, -5.47], [155.75, -6.0], [155.65, -6.25], [155.75, -6.5], [155.53, -7.03], [155.0, -7.25], [154.47, -7.03], [154.32, -6.68], [153.97, -6.53], [153.75, -6.0], [153.97, -5.47]]], [[[151.47, -5.03], [151.25, -4.5], [151.47, -3.97], [152.0, -3.75], [152.53, -3.97], [152.75, -4.5], [152.53, -5.03], [152.0, -5.25], [151.47, -5.03]]]]}, "2015-03-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[154.47, -5.47], [155.0, -5.25], [155.53, -5.47], [155.68, -5.82], [156.03, -5.97], [156.25, -6.5], [156.03, -7.03], [155.5, -7.25], [154.97, -7.03], [154.82, -6.68], [154.47, -6.53], [154.25, -6.0], [154.47, -5.47]]], [[[151.47, -5.03], [151.25, -4.5], [151.47, -3.97], [152.0, -3.75], [152.53, -3.97], [152.75, -4.5], [152.53, -5.03], [152.0, -5.25], [151.47, -5.03]]]]}, "2015-03-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[154.47, -5.47], [155.0, -5.25], [155.53, -5.47], [155.68, -5.82], [156.03, -5.97], [156.25, -6.5], [156.03, -7.03], [155.5, -7.25], [154.97, -7.03], [154.82, -6.68], [154.47, -6.53], [154.25, -6.0], [154.47, -5.47]]], [[[153.03, -3.47], [153.25, -4.0], [153.03, -4.53], [152.68, -4.68], [152.53, -5.03], [152.0, -5.25], [151.47, -5.03], [151.25, -4.5], [151.47, -3.97], [151.82, -3.82], [151.97, -3.47], [152.5, -3.25], [153.03, -3.47]]]]}, "2015-03-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[154.97, -7.03], [154.75, -6.5], [154.97, -5.97], [155.5, -5.75], [156.03, -5.97], [156.25, -6.5], [156.03, -7.03], [155.5, -7.25], [154.97, -7.03]]], [[[153.03, -3.47], [153.25, -4.0], [153.03, -4.53], [152.68, -4.68], [152.53, -5.03], [152.0, -5.25], [151.47, -5.03], [151.25, -4.5], [151.47, -3.97], [151.82, -3.82], [151.97, -3.47], [152.5, -3.25], [153.03, -3.47]]]]}, "2015-03-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[152.5, -3.25], [153.03, -3.47], [153.25, -4.0], [153.03, -4.53], [152.68, -4.68], [152.53, -5.03], [152.0, -5.25], [151.47, -5.03], [151.25, -4.5], [151.47, -3.97], [151.82, -3.82], [151.97, -3.47], [152.5, -3.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.3542343124412355}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.0243016766321393}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.800698634250352, 26.291208539871832, 26.280273260317244, 26.261389781581045, 26.105122899165906, 26.16942494385279, 24.52226929637186, 22.364058579843174, 23.079295762060838, 23.485615121723015, 23.65216298646078]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.800698634250352, 23.848843111545193, 23.511496048307777, 23.555426497179553, 25.156985968525476, 25.224932723910968, 22.169267936430572, 21.98004629162989, 22.1410002961548, 22.59611676307395, 22.65235370441394]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-0.7819643247582349, -1.0406964706672284, -1.0600459865140255, -0.9994779815856053, -0.9272732826985475, -0.9414145188114466, -0.9821131746013521, -1.2452483957894742, -1.0570594587186974, -0.9961312304484219, -1.0769307944275397]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-0.7819643247582349, -1.3206014038158855, -1.2109428624740417, -1.2087167352841561, -1.0372067282099806, -0.9484926788226744, -1.1109422862202791, -1.3542343124412355, -1.3490953739833458, -1.1503824142829444, -1.1859741088391615]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5949553600855961, -1.7049704392916862, -1.6978302833353445, -1.6172601688735284, -1.3737313869602867, -1.3970294129438503, -1.440888613227063, -1.7824345993920925, -1.5819508510581546, -1.5504293731939063, -1.8578455966679068]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5949553600855961, -2.2044216878371534, -2.060390960009519, -2.4855257602958134, -1.6364492388929803, -1.5011955737002238, -1.5373008290889838, -2.0118441156465887, -1.8428532374673199, -1.725669912592726, -2.0396043483150748]}}