Interview: "Sediments play a significant role as carbon and nutrients sinks in Arctic fjords"

In this interview, PhD researcher Ricarda Runte delves into her work on Arctic sediment chemistry and its implications for understanding global climate dynamics, while also sharing her aspiration to bridge scientific research with environmental education.

Can you describe yourself briefly and explain what you are doing here and why it's important?

I am an environmental geochemist with a background in geoscience, management, and chemistry, focusing on environmental chemistry. My research involves studying the chemical phases of nutrients and carbon in polar sediments, particularly in Arctic regions like Greenland and Svalbard. This work is crucial because sediments, often overlooked, play a significant role as carbon and nutrients sinks in the ecosystem. Understanding their interactions with the water, especially during colder months, is vital for comprehending the Arctic's influence on global nutrient cycles. By investigating these processes, we aim to predict how changes in the Arctic environment might influence ocean ecosystems and global carbon dynamics.

Credit: Allison Bailey (Norwegian Polar Institute)

Why is it important to study Arctic sediments now?

We have limited knowledge about nutrient dynamics and carbon phases in sediments. While ocean waters have been studied extensively, sediments have been neglected. They are assumed to be sinks, but observed interactions, such as methane seepages, suggest otherwise. Understanding these processes is essential for predicting how changes in the Arctic environment might influence ocean ecosystems and global carbon dynamics. As climate change accelerates, the Arctic is undergoing rapid transformations, making it crucial to understand these dynamics now more than ever.

What methods are you using in your research?

We employ a variety of methods to analyze sediments and porewaters from different Arctic locations, including South Greenland, North Greenland, and Svalbard. Our goal is to identify seasonal and spatial differences in chemical cycling. Techniques like speciation analysis help us study how chemicals cycle within sediments and interact with overlaying waters. This research helps fill knowledge gaps about sediment interactions and their impact on ocean ecosystems. By comparing different sites and seasons, we aim to understand the factors influencing these chemical processes, such as geology, organic matter content, and latitude.

Credit: Ricarda Runte (iC3)

How do you see your role within the iC3 Polar Research Hub?

My role involves understanding the linkage between marine and terrestrial systems, particularly how glaciers influence ocean ecosystems. iC3 focuses on the interface between these systems, and my work contributes to understanding the carbon cycle and its spatial and temporal influences. By studying different locations and conditions, such as whether a glacier is marine or land-terminating, we aim to understand how these factors affect the overall system.

Can you share some background on your education and how you ended up in this field?

I'm originally from Germany and completed my bachelor's in Aachen, where I studied a mix of geoscience, management, and geography. I did a research internship in Bergen, Norway, which I enjoyed immensely. I started a master's in Germany but switched to a research-based program in Trondheim, focusing on Arctic and marine environmental chemistry. This program included fieldwork in Svalbard, which enriched my understanding of Arctic environments and solidified my interest in this field. My experiences in Svalbard, with all their challenges like polar bears, provided invaluable insights into Arctic research.

What are your future aspirations in science?

I aspire to explore both academic and consulting roles, valuing the diverse opportunities in science. I'm particularly interested in the intersection of fieldwork, laboratory research, and teaching. I aim to have a meaningful impact on environmental understanding and education, contributing to science by investigating chemical interactions and creating awareness. While I enjoy my current research, I am open to exploring other areas, such as contamination studies, to broaden my impact.

What are some personal interests or hobbies you enjoy outside of work?

Outside of work, I enjoy outdoor activities like hiking, skiing, and kayaking. I have a passion for volunteering in community and student organizations, which allows me to give back and connect with others. I find joy in exploring nature and engaging in activities that promote sustainability and community well-being. These interests not only provide a balance to my professional life but also inspire my commitment to environmental science.

Credit: Ricarda Runte (iC3)

Ricarda Runte is an iC3 PhD student at the Arctic University of Norway in Tromsø, the capital of the Arctic. To find out more about her work, please check out her list of publications, or contact her by email.