MCA Pilot PUI: Proxy-model comparison using carbon isotopes from annually banded marine calcifiers and ocean circulation inverse models to evaluate coastal carbon cycle processes

MCA Pilot PUI：使用年度带状海洋钙化物的碳同位素和海洋环流反演模型进行代理模型比较，以评估沿海碳循环过程

• 批准号: 2322042
• 负责人: Branwen Williams
• 金额: $ 32.32万
• 依托单位: Claremont McKenna College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2024
• 资助国家: 美国
• 起止时间: 2024-01-01 至 2026-12-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2322042&HistoricalAwards=false
• 关键词: MCA; Pilot; PUI; Proxy; model

The ocean is a large sink of anthropogenic carbon from the atmosphere. Thus, calculating the movement of carbon into the oceans is important to understand future atmospheric carbon dioxide concentrations. Ocean climate models are a powerful tool to understand the processes that control carbon cycling. However, large discrepancies exist among data estimates and an ocean circulation inverse model (OCIM) that models carbon isotopes in the ocean. This project will use data obtained from proxy archives to perform a model-proxy data comparison as an independent test of the model-simulated carbon isotopes. The research would provide the first proxy data – model output comparison of carbon isotope records from marine carbonates and simulations from OCIMs to better understand carbon cycling in the coastal regions of the North Atlantic and North Pacific Oceans. The comparison would address offsets and timing differences due to proxy archive and model biases related to seasonality, air-sea gas exchange, proxy archive chronological uncertainty, and broader environmental/climatic processes not constrained in the model. This project will analyze discrepancies between model output and proxy data to better constrain the carbon cycling processes critical to understanding the removal of anthropogenic carbon dioxide from the atmosphere and into the oceans. Thus, this work will contribute to societally relevant understanding of the processes that mitigate ongoing climate change. The project will support a mid-career researcher at a primary undergraduate institution. At the interface of societally relevant climate science and numerical modeling, this project will train undergraduate students through research experiences and will incorporate content into the curriculum of the new science department, thus providing an investment in workforce capabilities that will extend beyond the project duration.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

海洋是大气中人类碳的大水槽。这是计算碳进入海洋的运动对于理解未来大气二氧化碳浓度很重要。海洋攀岩模型是了解控制碳循环的过程的强大工具。然而，数据估计值和海洋循环反向模型（OCIM）之间存在巨大差异，该模型模拟了海洋中的碳同位素。该项目将使用从代理档案中获得的数据来执行模型数据比较，作为对模型模拟的碳同位素的独立测试。这项研究将提供第一个代理数据 - 海洋碳酸盐碳酸盐碳酸盐和模拟的模型输出比较，以更好地了解北大西洋和北太平洋沿海地区的碳循环。该比较将解决因代理档案库和模型偏见而引起的偏移和时间差异，与季节性，空气气体交换，代理档案时间顺序不确定性以及更广泛的环境/气候过程不受限制。该项目将分析模型输出和代理数据之间的差异，以更好地限制碳循环过程至关重要的，这对于了解从大气和海洋中移除人为二氧化碳的去除。这项工作将有助于对减轻持续气候变化的过程的社会相关理解。该项目将支持小学本科机构的中期研究员。在与社会相关的气候科学和数值建模的界面上，该项目将通过研究经验培训本科生，并将内容纳入新科学系的课程中，从而提供了对劳动力能力的投资，这些投资将超出项目持续时间，超出项目奖项。该奖项将反映出NSF的法定任务，并通过评估范围来审查企业的范围，并已被评估范围构成了构成的构成，该奖项被认为是富有的。