Upwelling is a dynamic oceanographic process that brings cold, nutrient-rich waters to the surface. These nutrients encourage primary productivity, forming the foundation of coastal food webs and the fisheries depending on them. Understanding past variability in the occurrence of upwelling and primary productivity may offer insight into how upwelling dynamics and ecosystem productivity could vary in the future. Numerous proxies from sediment cores inform most upwelling reconstructions; however, their temporal resolution is typically decadal at best. However, questions regarding ecosystem responses to changes in physical processes require data with seasonal to sub-seasonal resolution because such data provide additional insight into seasonal extremes (e.g., surface temperature, precipitation, etc.). The calcium carbonate skeletons of mollusks provide invaluable data from stable oxygen (δ¹⁸O) and carbon (δ¹³C) isotopes that generate high-resolution reconstructions of environmental variables. Recent studies of stable nitrogen (δ¹⁵N) isotopes in mollusk shell organic materials demonstrate the potential to produce high-resolution reconstructions of nutrient cycling. Collectively, these measurements may provide insight into upwelling conditions over the life of the organism. This study presents preliminary data exploring the potential of analyzing a suite of stable nitrogen, oxygen and carbon isotope data from analysis of Pacific abalone shells (Haliotis cracherodii). We present sub-seasonal δ¹⁵N time series data that, together with δ¹⁸O and δ¹³C, reflect seasonal variability closely linked to upwelling. δ¹⁵N values range from 8.3‰ to 11.0‰ and align closely with δ¹⁸O values, which range from −0.5‰ to 1.1‰. Implications of this research are twofold: 1) Isotopic analyses from abalone shells may provide detailed knowledge on primary productivity during upwelling and as well as limited productivity when upwelling is greatly reduced and 2) archaeological shell middens in the Channel Islands contain an abundance of both abalone dating back to the early Holocene, presenting the opportunity to reconstruct upwelling throughout the Holocene.

上升流是一个动态的海洋学过程，将寒冷，营养丰富的水带到了地表。这些养分促进了初级生产力，为沿海食物网和依赖它们的渔业奠定了基础。了解上升流和原始生产力发生的过去变化可能会提供关于上升流动力学和生态系统生产力在未来如何变化的见解。沉积岩心的许多代理人为大多数上升流的重建提供了信息。但是，它们的时间分辨率通常最多为十年。但是，有关生态系统对物理过程变化的响应的问题需要具有季节至次季节分辨率的数据，因为此类数据提供了对季节性极端情况（例如，地表温度，降水等）的更多了解。¹⁸ O）和碳（δ ¹³ C）产生的环境变量的高分辨率重建同位素。稳定的氮的最近的研究（δ ¹⁵ N）同位素在壳软体动物的有机材料表现出以产生养分循环的高分辨率重建的潜力。总体而言，这些测量结果可以洞悉生物体整个生命周期内的上升流情况。这项研究提供了初步数据，探讨了通过分析太平洋鲍鱼壳（Haliotis cracherodii）分析一套稳定的氮，氧和碳同位素数据的潜力。我们本次季节δ ¹⁵ N个时间序列数据，与δ一起¹⁸ O和δ ¹³C，反映季节变化与上升趋势密切相关。δ ¹⁵的N个值的范围从8.3‰至11.0‰和对准紧密地与δ ^18个O值，其范围从-0.5‰至1.1‰。这项研究的意义有两个方面：1）鲍鱼壳的同位素分析可能提供有关上升过程中主要生产力的详细知识，以及上升幅度大大减少时有限的生产率，以及2）海峡群岛的考古贝壳中部包含大量鲍鱼可以追溯到全新世早期，这为重建整个全新世的上升流提供了机会。