Document Type
Article
Date of Original Version
2024
Department
Oceanography
Abstract
Shipboard sampling of ocean biogeochemical properties is necessarily limited by logistical and practical constraints. As a result, the majority of observations are obtained for the spring/summer period and in regions relatively accessible from a major port. This limitation may bias the conceptual understanding we have of the spatial and seasonal variability in important components of the Earth system. Here we examine the influence of sampling bias on global estimates of carbon export flux by sub-sampling a biogeochemical model to simulate real, realistic and random sampling. We find that both the sparseness and the 'clumpy' character of shipboard flux observations generate errors in estimates of globally extrapolated export flux of up to ∼ ± 20%. The use of autonomous technologies, such as the Biogeochemical-Argo network, will reduce the uncertainty in global flux estimates to ∼ ± 3% by both increasing the sample size and reducing clumpiness in the spatial distribution of observations. Nevertheless, determining the climate change-driven trend in global export flux may be hampered due to the uncertainty introduced by interannual variability in sampling patterns.
Publication Title, e.g., Journal
Environmental Research Letters
Volume
19
Citation/Publisher Attribution
Henson, S., Bisson, K., Hammond, M. L., Martin, A., Mouw, C. & Yool, A. (2024). Effect of sampling bias on global estimates of ocean carbon export. Environ. Res. Lett., 19, 024009. https://doi.org/10.1088/1748-9326/ad1e7f
Available at: https://doi.org/10.1088/1748-9326/ad1e7f
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.