Pore water data from sediment cores collected from R/V Oceanus cruise OC1906A and R/V Sikuliaq cruise SKQ202016S off the coast of California in 2019 and 2020

Sediment pore waters were determined in cores collected at several stations off the coast of California: at a site in Santa Barbara Basin ('SBB'; latitude: 34.223, Longitude: -119.986; water depth, 590 m); Catalina Basin ('Cat'; latitude: 33.301, longitude: -118.6; water depth, 1310 m); and two sites off the coast of central California south of Monterey Bay; site 'K' (latitude 35.375, longitude -121.501, water depth, 1000 m) and site 'D' (latitude 36.113, longitude: -122.186, water depth, 1440 m). The Cat cores were collected in June 2019, while the site K and D cores were collected in December 2020. Pore waters were collected either using rhizon samplers or by centrifugation of sectioned sediments. Pore water samples were analyzed for alkalinity on-board the ship, while other analyses were returned to the shore-based lab at Old Dominon University (ODU) where they were analyzed. These samples were collected as part of a larger project examining deaminated peptides and organic matter cycling in the sediments at these sites.本研究于加利福尼亚州外海多个站位采集沉积物岩芯，对其中的孔隙水进行测定：包括圣巴巴拉盆地（Santa Barbara Basin，简称SBB；纬度34.223，经度-119.986，水深590 m）站位、卡特琳娜盆地（Catalina Basin，简称Cat；纬度33.301，经度-118.6，水深1310 m）站位，以及蒙特雷湾以南加利福尼亚中部外海的两个站位：K站位（纬度35.375，经度-121.501，水深1000 m）与D站位（纬度36.113，经度-122.186，水深1440 m）。卡特琳娜盆地的岩芯采集于2019年6月，K站位与D站位的岩芯则采集于2020年12月。孔隙水样品的采集采用根状采样器（rhizon sampler）或对切片沉积物进行离心的方式。孔隙水样品的碱度指标在科考船现场完成测定，其余分析项目则送至旧多米宁大学（Old Dominion University, ODU）的岸基实验室开展检测。本次样品采集隶属于一项更大的研究项目，该项目旨在探究上述站位沉积物中的脱氨基肽与有机质循环过程。