Coring in San Francisco Bay to Obtain A Record of Paleo-Streamflow from the Last Interglacial

摘要ATM-9908416英格拉姆，加州大学伯克利分校题目：在旧金山湾取心以获得来自最后一次间冰期的古水流记录该SGER奖支持取芯和对取芯沉积物的初步测年和分析，并测试使用最后一次间冰期河口沉积物的可行性，并得出旧金山湾的古水流和环境变化的记录。最近利用沉积物岩心软体化石贝壳的同位素组成对旧金山湾的古盐度进行了研究，发现在全新世晚期，流入的水在十年到百年的尺度上发生了显著的变化。盐度趋势表明，与现在相比，延长的时期要潮湿得多，其他时期则要干燥得多。一项高分辨率的研究对于发现与气候波动有关的海湾十年至百年尺度的变化是重要的。

AbstractATM-9908416Ingram, BonnyeUniversity of California, BerkleyTitle: Coring in San Francisco Bay to Obtain A Record of Paleo-Streamflow from the Last InterglacialThis SGER award supports coring and preliminary dating and analysis of cored sediments, and to test the feasibility of using last interglacial estuarine sediments, and to derive a record of paleo-streamflow and environmental change in San Francisco Bay. Recent investigations of San Francisco Bay paleosalinity using isotopic compositions of fossil mollusk shells from sediments cores, reveal significant variations in inflow on decadal-to century-time scales during the late Holocene. The salinity trends indicate that extended periods were much wetter, and others much drier, than the present time. A high-resolution study is important to detect decadal- to century-scale changes in the Bay related to climate fluctuations.