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通过相轮分析,讨论了北印度洋孟加拉深海扇扇区和东经90°海岭岭区的沉积记录部分环境指标间可能存在的相互联系.60 kaBP以来短周期的快速变化在扇区得到充分反映,其中,古生产力的变化与夏季季风的兴衰并非呈简单的线性关系,与西北印度洋的替代性指标意义相反,上升流种Globigerina bulloides的相对富集在研究区不是印度夏季季风增强反是其减弱的信号.岭区记录在更长的时间范围内显示了与扇区记录基本对应的气候演化特征,还初步讨论了发生于165 kaBP前后的重大海洋生态环境恶化事件,认为其很可能亦是印度季风活动的产物.
Based on the phase analysis, the possible interrelationship between some environmental parameters of sedimentary records in the deep-sea fan sector of the northern Indian Ocean and the 90 ° ridge ridge of east longitude is discussed. The rapid change of short period since 60 kaBP is fully reflected in the sector, The change of paleoproductivity was not linear with the rise and fall of summer monsoon. Contrary to the alternative index of the Northwest Indian Ocean, the relative enrichment of up-flowed species Globigerina bulloides was not a sign of weakening of summer monsoon in India. . Ridge records show the evolutionary characteristics of the climate corresponding to the sectoral records over a longer period of time, and also discuss the major marine environmental deterioration events occurring before and after 165 kaBP, suggesting that it is also likely to be also a part of the Indian monsoon activity Of the product.