{
 "about": "The record of this Plate: the facts it is drawn from, kept inside the work. Plain JSON; the artwork does not read it. CC0 1.0, no rights reserved.",
 "work": {"title": "North Bismarck", "series": "Plates", "artist": "Kenny Lienhard", "year": 2026, "plate": "32 of 52", "palette": "serpentine"},
 "plate": {"name": "North Bismarck", "code": "NB", "model": "PB2002 (Bird 2003)", "class": "micro", "area_km2": 388137, "centroid_lat_lon": [-2.518, 148.635], "ocean_share": 0.9703, "land_share": 0.0297},
 "motion": {"frame": "no-net-rotation", "euler_pole_lat_lon": [-45.1923, 124.2981], "rotation_deg_per_million_years": 0.84932, "speed_mm_per_year_at_centroid": 69.88, "heading_deg_at_centroid": 293.1, "speed_range_mm_per_year": [66.87, 72.23], "the_artwork_drifts": "-69.88 mm a year along its cut, one frame of rock every 13312 years"},
 "cover": {"slope and ridge": 0.8231, "deep ocean": 0.1177, "rainforest": 0.0282, "shelf sea": 0.0254, "ocean trench": 0.0042, "lakes and rivers": 0.0006, "cropland": 0.0005, "grassland": 0.0002, "forest": 0.0001, "towns": 0.0001},
 "palette_from": ["ocean", "deep ocean", "jungle"],
 "era": null,
 "past": {"account": "The past. At the ice age peak the sea stood about 120 metres lower: New Hanover was joined to New Ireland, and Manus more than doubled in size, yet only about 6,000 square kilometres, under 2 percent of this plate’s sea, became land, and Manus stayed more than 200 kilometres from New Guinea and New Ireland. The sea surface was about 3 degrees cooler than today and had warmed to within a degree of it by about 13,000 years ago, while the rainforest of New Ireland changed little. People had lived on New Ireland since about 42,000 years ago, and about 20,000 years ago they brought the cuscus over from New Guinea.", "source": "Lambeck et al. 2014, PNAS 111:15296; Tachikawa 2024, PANGAEA 965889; Kerby et al. 2022, World Archaeology 54:317; Leavesley 2005, Asian Perspectives 44:207"},
 "history": [{"years_ago": 3500000, "range_years_ago": [3675000, 3325000], "what": "The floor of the Bismarck Sea began to spread apart along this plate's southern edge.", "source": "Taylor 1979, Geology 7:171, doi:10.1130/0091-7613(1979)7<171:BSEOAB>2.0.CO;2"}],
 "outline_lon_lat": [[[153.61, -5.7], [153.82, -6.05], [153.93, -6.26], [154.22, -6.51], [154.54, -6.82], [154.93, -7.29], [154.53, -6.42], [154.54, -5.9], [154.59, -5.58], [154.98, -5.24], [154.99, -4.89], [154.96, -4.55], [154.7, -4.28], [154.36, -3.95], [154.26, -3.61], [154.03, -3.33], [153.88, -3.04], [153.71, -2.69], [153.54, -2.6], [153.39, -2.44], [153.12, -2.2], [152.92, -2.15], [152.58, -2.13], [152.16, -1.86], [151.82, -1.65], [151.43, -1.46], [151.09, -1.31], [150.72, -1.22], [150.34, -1.12], [150.02, -1.02], [149.77, -1.0], [149.48, -0.82], [149.27, -0.65], [148.91, -0.46], [148.72, -0.39], [148.34, -0.41], [147.86, -0.43], [147.35, -0.27], [147.06, -0.29], [146.59, -0.29], [145.92, -0.35], [145.5, -0.47], [145.03, -0.53], [144.36, -0.74], [143.81, -0.95], [143.26, -1.16], [142.92, -1.45], [142.63, -1.92], [142.39, -2.46], [142.25, -2.69], [142.45, -2.81], [142.63, -2.93], [142.94, -3.02], [143.17, -3.05], [143.51, -3.16], [143.74, -3.46], [144.37, -3.53], [144.81, -3.55], [145.4, -3.49], [146.11, -3.47], [146.41, -3.44], [146.84, -3.75], [146.92, -3.64], [147.0, -3.51], [147.08, -3.39], [147.16, -3.26], [147.24, -3.15], [147.32, -3.05], [147.41, -2.96], [147.48, -2.91], [147.54, -2.88], [147.6, -2.88], [147.82, -2.81], [147.98, -2.92], [148.12, -3.03], [148.33, -3.14], [148.5, -3.22], [148.68, -3.31], [148.88, -3.39], [149.09, -3.47], [149.29, -3.52], [149.45, -3.54], [149.6, -3.57], [149.72, -3.58], [149.77, -3.59], [149.82, -3.62], [149.82, -3.62], [149.91, -3.49], [150.03, -3.37], [150.13, -3.27], [150.25, -3.2], [150.35, -3.14], [150.44, -3.09], [150.51, -3.06], [150.56, -3.05], [150.62, -3.05], [150.62, -3.08], [150.63, -3.16], [150.68, -3.23], [150.73, -3.3], [150.79, -3.33], [150.82, -3.35], [150.88, -3.33], [150.93, -3.37], [150.98, -3.42], [151.02, -3.48], [151.09, -3.55], [151.14, -3.59], [151.2, -3.6], [151.25, -3.61], [151.3, -3.66], [151.38, -3.71], [151.43, -3.75], [151.56, -3.67], [151.68, -3.77], [151.81, -3.72], [151.93, -3.68], [151.99, -3.65], [152.04, -3.64], [152.13, -3.67], [152.23, -3.74], [152.33, -3.82], [152.41, -3.9], [152.48, -3.97], [152.56, -4.04], [152.62, -4.13], [152.66, -4.19], [152.93, -4.6], [153.19, -5.02], [153.4, -5.36], [153.61, -5.7]]],
 "sources": ["Plate outlines and motion: Bird, P. (2003). An updated digital model of plate boundaries. Geochemistry, Geophysics, Geosystems 4(3), 1027, doi:10.1029/2001GC000252. No-net-rotation frame computed from PB2002 alone.", "What covers each plate: ESA CCI Land Cover and Water Bodies, NOAA ETOPO 2022, Koppen-Geiger climate maps, NSIDC Sea Ice Index, on a 1 arc-minute grid."],
 "engine_sha256": "a7fbc03acc0fc9ba343881bb88ddaf2b7564564d8bc9cbed16e75e47e01fb3f2"
}