Melissa Omand

Estimating Submesoscale‐Driven Particulate Organic Carbon Flux From Remote Sensing at a Dynamic Upwelling Front

Sarah E. Lang, Melissa Omand, Mara Freilich, Andrey Shcherbina et autres

Abstract Submesoscale (1–10 km) vertical velocities at fronts enhance the exchange of particulate organic carbon (POC) and heat between the surface ocean and depth. While POC and temperature can be readily assessed in situ, direct quantification of flux remains uncertain due to …

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SUBMESOSCALE EDDY TRAPPING SUPPORTS PLANKTONIC ACTIVITY BEYOND THE COASTAL UPWELLING ZONE

Élise Beaudin, Dante Capone, SARAH E. LANG, Melissa Omand et autres

Eastern boundary current systems are among the most productive marine ecosystems, sustained by coastal upwelling that brings cold, nutrient-rich waters to the surface. While this process fuels high primary productivity nearshore, the offshore region remains nutrient-depleted. Mesoscale eddies (∼100 km) are known …

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Investigating the Durability of PHA-Coated Burlap for Coastal Restoration

Roya Gadimli, Chavon Thomas, Melissa Omand, Julie Albert

High Resolution Image Download MS PowerPoint Slide Many synthetic textiles are used in coastal restoration because natural fiber materials have lower durability and may degrade too quickly; however, these synthetic materials pose environmental risks, such as microplastic pollution. Motivated by the need …

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Monsoons, plumes, and blooms: intraseasonal variability of subsurface primary productivity in the Bay of Bengal

Tamara Schlosser, Andrew J. Lucas, Melissa Omand, J. Thomas Farrar

Abstract. During the southwest monsoon, seasonal storms bring torrential rainfall to the South Asian subcontinent and the northern Indian Ocean. Dense cloud cover limits the amount of sunlight that reaches the ocean surface, and sediment-laden river runoff limits the depths to which …

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The case for ocean iron fertilization field trials

Ken O. Buesseler, Daniele Bianchi, Wil Burns, Fei Chai et autres

Solving the climate-ocean crisis requires both cutting emissions and pursuing carbon dioxide removal (CDR). Past ocean iron fertilization (OIF) experiments in some parts of the ocean have shown that small additions of iron can enhance phytoplankton growth and CO 2 drawdown. However, …

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Diel Dynamics of Zooplankton Fecal Pellet Flux Revealed by Integrated Optical Observations and Modeling

Yixuan Song, Melissa Omand, Colleen A. Durkin, Margaret Estapa et autres

The contribution of sinking fecal pellets to the biological carbon pump depends on pellet properties, producer abundance, and the depth and timing of pellet production, which can be modulated by diel vertical migration. We examined diel variability in zooplankton fecal pellet flux …

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Assessing Marine Snow Dynamics During the Demise of the North Atlantic Spring Bloom Using In Situ Particle Imagery

David A. Siegel, Adrian Burd, Margaret Estapa, Erik Fields et autres

Abstract The ocean's biological pump, a critical component of the Earth's carbon cycle, transports organic matter from the surface ocean to depth and is dominated by sinking particles, often in the form of marine snow‐sized (diameter ≥0.5 mm) aggregates. Controls of sinking …

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Airborne Remote Sensing of Concurrent Submesoscale Dynamics and Phytoplankton

Sarah E. Lang, Melissa Omand, Luc Lenain

Abstract Submesoscale dynamics can induce significant vertical fluxes of phytoplankton, nutrients, and carbon, resulting in biological and climatological impacts such as enhanced phytoplankton production, phytoplankton community shifts, and carbon export. However, resolving these dynamics is challenging due to their rapid evolution (hours …

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Open ocean biogeochemical impacts of extreme terrestrial precipitation

Mara Freilich, Shailja Gangrade, Élise Beaudin, Kelly Luis et autres

Extreme events reshape ocean ecosystems with significant implications for nutrient and carbon cycling. Here we demonstrate that flooding on land can be a significant driver of biogeochemical variability in the open ocean, even in dry climates. Using satellite observations, in situ measurements, …

Monsoons, plumes, and blooms: intraseasonal variability of subsurface primary productivity in the Bay of Bengal

Tamara Schlosser, Andrew J. Lucas, Melissa Omand, J. Thomas Farrar

Abstract. During the southwest monsoon, seasonal storms bring torrential rainfall to the South Asian subcontinent and the northern Indian Ocean. Dense cloud cover limits the amount of sunlight that reaches the ocean surface, and sediment-laden river runoff limits the depths to which …

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Supplementary material to "Monsoons, plumes, and blooms: intraseasonal variability of subsurface primary productivity in the Bay of Bengal"

Tamara Schlosser, Andrew J. Lucas, Melissa Omand, J. Thomas Farrar

Analysis S1.1 Subsurface irradiance, attenuation, and PARThe vertical change in irradiance, I (µW cm -2 nm -1 ), was spectrally decomposed into numerous wavelengths via:where λ is the individual wavelength, K d is the diffuse attenuation coefficient over depth z, I 0 …

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GelCam : Visualizing sinking particle flux via a polyacrylamide gel‐based sediment trap

Yixuan Song, Melissa Omand, Colleen A. Durkin, Margaret Estapa et autres

Abstract Sinking particles play a key role in the biological carbon pump. While previous studies have analyzed particulate carbon flux over timescales of days to years, few have been able to resolve flux variability on shorter, hourly scales at multiple depths simultaneously. …

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