Palaeomonsoon and palaeoproductivity records of 𝛿18O, 𝛿13C and CaCO3 variations in the northern Indian Ocean sediments

[摘要] 𝛿18O and 𝛿13C of G. sacculifer have been measured in five cores from the northern Indian Ocean. In addition, high resolution analysis (1 to 2 cm) was performed on one core (SK-20-185) for both 𝛿18O and 𝛿13C in five species of planktonic foraminifera. CaCO3 variation was measured in two cores. The results, presented here, show thatthe summer monsoon was weaker during 18 ka and was stronger during 9 ka, relative to modern conditions;

[学科分类] 天文学(综合)

[关键词] Oxygen isotopes;carbon isotopes;sediments;foraminifera;productivity;monsoon.