Reconciliation of late Quaternary sea levels derived from coral terraces at Huon Peninsula with deep sea oxygen isotope records
Reconciliation of late Quaternary sea levels derived from coral terraces at Huon Peninsula with deep sea oxygen isotope records
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DOI：
10.1016/0012-821x(96)00062-3
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发表时间：
1996-06-01
影响因子：
5.3
通讯作者：
Pillans, B
中科院分区：
文献类型：
--
作者：
Chappell, J;Omura, A;Pillans, B
解决了巴布亚新几内亚胡恩半岛珊瑚礁阶地抬升导致的第四纪晚期海平面变化与深海岩心氧同位素变化之间的重大差异。这两种方法在120~80ka和20~0ka(ka=1000年前)范围内基本吻合，但在70~30ka之间，同位素海平面比前人研究的Huon半岛海平面低20~40m。新的高精度U系列年龄测量和修订的Huon半岛阶地年龄在30-70ka之间，现在给出的海平面与基于深海氧同位素数据、浮游生物和海底三角洲(18)O数据的海平面相似。利用海平面和深海同位素数据，计算了上一次冰川周期中北部大陆冰盖的氧同位素比值，结果与格陵兰冰芯的结果一致。上一次冰川周期中冰量变化的记录现在似乎已经相当完整。
A major discrepancy between the Late Quaternary sea level changes derived from raised coral reef terraces at the Huon Peninsula in Papua New Guinea and from oxygen isotopes in deep sea cores is resolved. The two methods agree closely from 120 ka to 80 ka and from 20 ka to 0 ka (ka = 1000 yr before present), but between 70 and 30 ka the isotopic sea levels are 20-40 m lower than the Huon Peninsula sea levels derived in earlier studies. New, high precision U-series age measurements and revised stratigraphic data for Huon Peninsula terraces aged between 30 and 70 ka now give similar sea levels to those based on deep sea oxygen isotope data planktonic and benthic delta(18)O data. Using the sea level and deep sea isotopic data, oxygen isotope ratios are calculated for the northern continental ice sheets through the last glacial cycle and are consistent with results from Greenland ice cores. The record of ice volume changes through the last glacial cycle now appears to be reasonably complete.