@article{11, keywords = {biological pump, carbon cycle, chlorophyll, euphotic zone, food web, global ocean, mixed layer, phytoplankton, remote sensing, spatiotemporal analysis, surface layer, surface water, Atlantic Ocean, Atlantic Ocean (North), Pacific Ocean, Pacific Ocean (Northeast)}, author = {D.A. Siegel and I. Cetini{\'c} and J.R. Graff and C.M. Lee and N. Nelson and M.J. Perry and I.S. Ramos and D.K. Steinberg and K. Buesseler and R. Hamme and A.J. Fassbender and D. Nicholson and M.M. Omand and M. Robert and A. Thompson and V. Amaral and M. Behrenfeld and C.R. Benitez-Nelson and K. Bisson and E. Boss and P.W. Boyd and M. Brzezinski and K. Buck and A. Burd and S. Burns and S. Caprara and C. Carlson and N. Cassar and H. Close and E. Asaro and C. Durkin and Z. Erickson and M.L. Estapa and E. Fields and J. Fox and S. Freeman and S. Gifford and W. Gong and D. Gray and L. Guidi and N. Ha{\"e}ntjens and K. Halsey and Y. Huot and D. Hansell and B. Jenkins and L. Karp-Boss and S. Kramer and P. Lam and J.-M. Lee and A. Maas and O. Marchal and A. Marchetti and A. McDonnell and H. McNair and S. Menden-Deuer and F. Morison and A.K. Niebergall and U. Passow and B. Popp and G. Potvin and L. Resplandy and M. Roca-Mart{\'\i} and C. Roesler and T. Rynearson and S. Traylor and A. Santoro and K.D. Seraphin and H.M. Sosik and K. Stamieszkin and B. Stephens and W. Tang and B. van Mooy and Y. Xiong and X. Zhang}, title = {An operational overview of the EXport processes in the ocean from RemoTe sensing (EXPORTS) northeast pacific field deployment}, abstract = {
The goal of the EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) field campaign is to develop a predictive understanding of the export, fate, and carbon cycle impacts of global ocean net primary production. To accomplish this goal, observations of export flux pathways, plankton community composition, food web processes, and optical, physical, and biogeochemical (BGC) properties are needed over a range of ecosystem states. Here we introduce the first EXPORTS field deployment to Ocean Station Papa in the Northeast Pacific Ocean during summer of 2018, providing context for other papers in this special collection. The experiment was conducted with two ships: a Process Ship, focused on ecological rates, BGC fluxes, temporal changes in food web, and BGC and optical properties, that followed an instrumented Lagrangian float; and a Survey Ship that sampled BGC and optical properties in spatial patterns around the Process Ship. An array of autonomous underwater assets provided measurements over a range of spatial and temporal scales, and partnering programs and remote sensing observations provided additional observational context. The oceanographic setting was typical of late-summer conditions at Ocean Station Papa: a shallow mixed layer, strong vertical and weak horizontal gradients in hydrographic properties, sluggish sub-inertial currents, elevated macronutrient concentrations and low phytoplankton abundances. Although nutrient concentrations were consistent with previous observations, mixed layer chlorophyll was lower than typically observed, resulting in a deeper euphotic zone. Analyses of surface layer temperature and salinity found three distinct surface water types, allowing for diagnosis of whether observed changes were spatial or temporal. The 2018 EXPORTS field deployment is among the most comprehensive biological pump studies ever conducted. A second deployment to the North Atlantic Ocean occurred in spring 2021, which will be followed by focused work on data synthesis and modeling using the entire EXPORTS data set. {\textcopyright} 2021 The Author(s). This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See http://creativecommons.org/licenses/by/4.0/.
}, year = {2021}, journal = {Elementa}, volume = {9}, number = {1}, url = {https://doi.org/10.1525/elementa.2020.00107}, doi = {10.1525/elementa.2020.00107}, note = {ps_limited_html}, }