Doctoral Student in Ecosystem COS Exchange / Doctoral Student in Ecosystem COS Exchange

Doctoral Student in Ecosystem COS Exchange

100%, Zurich, fixed-term

The Grassland Sciences Group is a vibrant and international team at the Department of Environmental Systems Science at ETH Zurich. We are seeking a reliable, enthusiastic, and highly motivated doctoral student with a passion for science to join our research efforts. Our research focuses on understanding the processes and systems involved in biosphere-atmosphere greenhouse gas exchange and its drivers in forests and agroecosystems in response to management practices and climate change.

Project Background

This position is integral to the project Above- and below-canopy COS fluxes to constrain and partition forest CO2 and ET fluxes (ABACOS), funded by the Swiss National Science Foundation. The goal is to quantify COS (carbonyl sulfide) fluxes at varying spatial and temporal scales within a temperate broadleaf forest in Switzerland (Lägeren), utilizing an innovative integration of co-located measurements. We will assess above- and below-canopy COS fluxes and analyze CO2 and evapotranspiration (ET) fluxes, as well as quantify the contributions of soil, branches, and understory vegetation to ecosystem fluxes. Advanced driver analyses employing machine learning techniques will offer detailed insights into the underlying processes. The project will culminate in a COS-based estimate of ecosystem gross primary productivity (GPP), to be compared against other independent estimates. Thus, ABACOS will provide a comprehensive assessment of different GPP constraints and contribute unique COS flux data to the global community from a temperate mixed forest, where such measurements are scarce. The ABACOS team will consist of the doctoral student (the position being offered), a postdoc (years 3 and 4), and a technician (years 1 to 3).

Job Description

The doctoral project will center on COS flux measurements and their application in CO2 flux partitioning in a temperate mixed forest in Switzerland. Your responsibilities will include:

• Measurements of eddy-covariance above- and below-canopy COS fluxes, in addition to CO2 and ET fluxes, supported by technical staff.
• Chamber measurements of branch and soil COS, CO2, and H2O fluxes.
• Quantification of the leaf-scale uptake ratio of COS to CO2.
• Leaf-scale stomatal conductance measurements.
• Assessment of various methods to constrain GPP.
• Statistical analysis, including the use of machine learning approaches.

This full-time position is funded for four years, with salary and social benefits provided in accordance with ETH Zurich's guidelines.

Profile

Applicants should hold a completed Master's degree in atmospheric sciences, environmental sciences, forest sciences, ecology, or a closely related field. Experience in micrometeorology, biogeochemistry, and/or plant ecophysiology is essential. Strong statistical skills, fieldwork experience, and programming proficiency (e.g., in R or Python) are required. Good written and spoken English as well as a driver’s license are mandatory. We expect applicants to exhibit strong writing skills and the ability to work effectively in an interdisciplinary environment.

Workplace

At ETH Zurich, you will be part of a collaborative and innovative environment that fosters scientific exploration and development.

We Offer

• Your career with impact: Join ETH Zurich, which not only supports your professional growth but also actively contributes to positive societal change.
• We are dedicated to creating a sustainable and climate-neutral university.
• Expect a range of benefits, including public transport season tickets, car sharing, access to an extensive array of sports facilities offered by ASVZ, childcare options, and attractive pension benefits.

We Value Diversity

In line with our values, ETH Zurich nurtures an inclusive culture. We promote equality of opportunity, value diversity, and strive to create an environment where the rights and dignity of all staff and students are respected. Visit our Equal Opportunities and Diversity website to learn how we ensure a fair and open atmosphere that allows everyone to thrive.

Curious? So Are We.

We look forward to receiving your online application with the following documents:

• Letter of motivation
• CV
• Bachelor's and Master's certificates with complete transcripts
• Contact information of two referees

The earliest starting date is 1 August 2025. We will begin reviewing applications by the end of May 2025. Please note that only applications matching the job profile will be considered.

For further information about the Grassland Sciences Group, please visit our website. Questions regarding the position should be directed to Prof. Dr. Nina Buchmann by email at Show e-mail.ch">Show e-mail.

About ETH Zurich

ETH Zurich is one of the world’s leading universities specializing in science and technology. We are renowned for our excellent education, cutting-edge research, and effective transfer of new knowledge into society. With over 30,000 individuals from more than 120 countries, ETH Zurich is a place that promotes independent thinking and fosters an inspiring environment of excellence. Located in the heart of Europe while fostering global connections, we collaboratively develop solutions for the pressing challenges of today and tomorrow.

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