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SCOPE 2021 SCOPE PARticles And Growth in the Oceanic Nutricline (SCOPE-PARAGON)

The 2021 SCOPE-PARAGON research expedition is a coordinated effort to characterize particle dynamics and remineralization in the upper 500 m of the North Pacific Subtropical Gyre. Despite the importance of particles as key sites of biological activity in an otherwise dilute seawater medium, there remain major gaps in our understanding of the specific processes and organisms controlling particle transformations. The 2021 SCOPE-PARAGON cruise will be directed towards understanding the processes and rates of biological particulate matter transformations (e.g., production, decomposition, sinking) as well as the ecological interactions that occur in association with suspended and sinking particles. These targeted studies of particle dynamics at Station ALOHA will leverage ongoing ecological and biogeochemical modeling efforts in SCOPE.

The SCOPE-Gradients program is designed to test conceptual and mathematical models of biogeochemical organization across the transition zone between different ecosystems. Our studies are grounded by three hypotheses derived from ecological theory and manifested by the Darwin ecosystem model output. (1) Optimal supply ratios of fixed nitrogen and iron result in enhanced productivity across the transition zone. (2) The size distribution of organisms (PSD) across the transition zone are predictable under steady state conditions. (3) Trends in elemental and macro-molecular composition of primary producers will vary predictably across the transition zone.
HOT-LAVA Logo 2018 Life Aquatic in the Volcanic Aftermath (HOT LAVA)

Kilauea volcano on the island of Hawaii is currently in a violent eruptive phase with significant activities both at the summit caldera and at several points along the East Rift Zone. This rare event provides a unique opportunity to investigate hydrothermal processes at the lava-seawater contact zone (Kapoho Bay region) and the impacts of volcanic aerosol and ash deposition on surrounding marine ecosystems. We propose to conduct an oceanographic expedition to the regions east of Kapoho and west (downwind) of the summit to collect samples and conduct experiments that will lead to a more comprehensive understanding of the marine biogeochemistry of the 2018 Kilauea eruption.
SCOPE 2018 SCOPE Falkor Cruise

The Falkor cruise will build on the observations of the SCOPE expeditions conducted during 2015-2017 by looking at diel variability associated with the deep chlorophyll maximum and quantifying the impact of mesoscale eddies on the ecology and functioning of the North Pacific Subtropical Gyre. A unique aspect to the expedition is the use of Long-Range Autonomous Underwater Vehicles (LRAUVs) which will be integrated into the science operations in conjunction with other oceanographic equipment.
SCOPE 2017 Microbial Ecology of the Surface Ocean - SCOPE (MESO-SCOPE)

The MESO-SCOPE (Microbial Ecology of the Surface Ocean - Simons Collaboration on Ocean Processes and Ecology) expedition collected oceanographic observations in the region north of the Hawaiian Islands with the aim of identifying the impact of mesoscale eddies on the ecosystem of the North Pacific Subtropical Gyre. The expedition targeted a mesoscale dipole north of the island of Oahu to characterize: 1) the horizontal variability in biogeochemical and ecological properties across the two eddies; and 2) Lagrangian temporal dynamics at the two eddy centers, with a particular focus on diel processes.
SCOPE 2016 SCOPE Hawaii Ocean Experiment - Legacy 3-4: Characterizing eddies in the NPSG

In spring of 2016, SCOPE had two cruises that explored the features of eddies. HOE-Legacy 3 (23-29 March) targeted an anticyclonic eddy for Lagrangian sampling, focusing on temporal variability of the ecosystems inside. HOE-Legacy 4 (9-14 May) transected across an eddy dipole - adjacent anticyclonic and cyclonic eddy systems - to characterize the ecological and biogeochemical variability, specifically in terms of biogeochemical stocks, biological rates, community composition, transcriptomics, and metabolomics.
SCOPE 2015 SCOPE Hawaii Ocean Experiment - Legacy 2: Diel sampling in the NPSG

During July-August 2015, SCOPE scientists ventured north of the Hawaiian Islands towards Stn ALOHA to investigate biological variability over diel timescales in a coherent body of water. We used a Lagrangian sampling approach whereby the research vessel deployed and tracked a drifter during the period of diel measurements. More specifically, we measured production and loss processes over the day-night cycle related to productivity/respiration, growth/grazing, and more. These rate measurements are related to community composition, microorganism physiology, and also microbe-microbe interaction via production and exchange of metabolites. The shipboard work at Station ALOHA connects this expedition with the long-term Hawaii Ocean Times-series (HOT) monitoring program.
SCOPE 2015 SCOPE Transect

In March, 2015 SCOPE scientists participated in a transect cruise from Portand, Oregon to Honolulu, Hawaii on the R/V Kilo Moana. The science plan centered around the measurement of the diel cycle of growth, mortality and metabolite production across a gradient from the productive coastal ocean to the oligotrophic North Pacific Subtropical Gyre. Cruise participants worked collaboratively to (1) conduct real time cell-size based measurements of Prochlorococcus growth and mortality and pair these with proxies for net productivity based on the diel cycle of particulate carbon; (2) determine the presence/abundance of Prochlorococcus phages as a causal mechanism for observed patterns of Prochlorococcus mortality, (3) measure the dawn/dusk inventory of distinct dissolved and particulate metabolites (4) carry out metaproteomic analyses and targeted peptide analysis on the microbial community. All samples were collected from the ship's underway system.
Hawaii Ocean Time-series SCOPE data collected during HOT cruises

Scientists working on the Hawaii Ocean Time-series (HOT) program have been making repeated observations of the hydrography, chemistry and biology of the water column at a station north of Oahu, Hawaii since October 1988. The objective of this research is to provide a comprehensive description of the ocean at a site representative of the North Pacific subtropical gyre. Cruises are made approximately once per month to the deep-water Station ALOHA (A Long-Term Oligotrophic Habitat Assessment; 22° 45'N, 158° 00'W) located 100 km north of Oahu, Hawaii. Measurements of the thermohaline structure, water column chemistry, currents, optical properties, primary production, plankton community structure, and rates of particle export are made on each cruise.
C-MORE Center for Microbial Oceanography: Research and Education

C-MORE is a recently established (August 2006) NSF-sponsored Science and Technology Center designed to facilitate a more comprehensive understanding of the diverse assemblages of microorganisms in the sea, ranging from the genetic basis of marine microbial biogeochemistry including the metabolic regulation and environmental controls of gene expression, to the processes that underpin the fluxes of carbon, related bioelements and energy in the marine environment. Stated holistically, C-MORE's primary mission is: Linking Genomes to Biomes