Melissa Omand
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View article: Assessing Marine Snow Dynamics During the Demise of the North Atlantic Spring Bloom Using In Situ Particle Imagery
Assessing Marine Snow Dynamics During the Demise of the North Atlantic Spring Bloom Using In Situ Particle Imagery Open
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) aggre…
View article: Airborne Remote Sensing of Concurrent Submesoscale Dynamics and Phytoplankton
Airborne Remote Sensing of Concurrent Submesoscale Dynamics and Phytoplankton Open
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 …
View article: Open ocean biogeochemical impacts of extreme terrestrial precipitation
Open ocean biogeochemical impacts of extreme terrestrial precipitation Open
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 clima…
View article: Supplementary material to "Monsoons, plumes, and blooms: intraseasonal variability of subsurface primary productivity in the Bay of Bengal"
Supplementary material to "Monsoons, plumes, and blooms: intraseasonal variability of subsurface primary productivity in the Bay of Bengal" Open
View article: Monsoons, plumes, and blooms: intraseasonal variability of subsurface primary productivity in the Bay of Bengal
Monsoons, plumes, and blooms: intraseasonal variability of subsurface primary productivity in the Bay of Bengal Open
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…
View article: <scp>GelCam</scp>: Visualizing sinking particle flux via a polyacrylamide gel‐based sediment trap
<span>GelCam</span>: Visualizing sinking particle flux via a polyacrylamide gel‐based sediment trap Open
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 mul…
View article: Airborne remote sensing of concurrent submesoscale dynamics and phytoplankton
Airborne remote sensing of concurrent submesoscale dynamics and phytoplankton Open
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 …
View article: GelCam: Visualizing Sinking Particle Flux via a Polyacrylamide Gel-Based Sediment Trap
GelCam: Visualizing Sinking Particle Flux via a Polyacrylamide Gel-Based Sediment Trap Open
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 mul…
View article: Marine plankton community and net primary production responding to island-trapped waves in a stratified oligotrophic ecosystem
Marine plankton community and net primary production responding to island-trapped waves in a stratified oligotrophic ecosystem Open
The oligotrophic Adriatic Sea is characterized during a typical summer by low productivity caused by strong water column stratification, which inhibits vertical mixing and nutrient supply to the euphotic zone. These conditions can be disru…
View article: Assessing Marine Snow Dynamics During the Demise of the North Atlantic Spring Bloom Using In Situ Particle Imagery
Assessing Marine Snow Dynamics During the Demise of the North Atlantic Spring Bloom Using In Situ Particle Imagery Open
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) aggr…
View article: A new, global optical sediment trap calibration
A new, global optical sediment trap calibration Open
Autonomous sensors for gravitational carbon flux in the ocean are critically needed, because of uncertainties in the projected response of the biological carbon pump (BCP) to climate change, and the proposed, engineered acceleration of the…
View article: Assessment of oceanographic conditions during the North Atlantic EXport processes in the ocean from RemoTe sensing (EXPORTS) field campaign
Assessment of oceanographic conditions during the North Atlantic EXport processes in the ocean from RemoTe sensing (EXPORTS) field campaign Open
View article: EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) North Atlantic sensor calibration and intercalibration documents
EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) North Atlantic sensor calibration and intercalibration documents Open
The following documents collect information regarding the calibration and intercalibration of various sensors that were deployed during the North Atlantic field component of the NASA EXPORTS project (EXPORTS NA), which took place between M…
View article: Assessment of Oceanographic Conditions during the North Atlantic EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) Field Campaign
Assessment of Oceanographic Conditions during the North Atlantic EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) Field Campaign Open
This manuscript presents an overview of NASA’s EXport Processes in the Ocean from Remote Sensing 2021 Field Campaign in the North Atlantic (EXPORTS NA) and provides quantitative and dynamical descriptions of the physical processes modulati…
View article: A new, global optical sediment trap calibration
A new, global optical sediment trap calibration Open
Autonomous sensors for gravitational carbon flux in the ocean are critically needed, because of uncertainties in the projected response of the biological carbon pump (BCP) to climate change, and the proposed, engineered acceleration of the…
View article: Evaluation of new and net community production estimates by multiple ship-based and autonomous observations in the Northeast Pacific Ocean
Evaluation of new and net community production estimates by multiple ship-based and autonomous observations in the Northeast Pacific Ocean Open
New production (NP) and net community production (NCP) measurements are often used as estimates of carbon export potential from the mixed layer of the ocean, an important process in the regulation of global climate. Diverse methods can be …
View article: The Outsized Role of Salps in Carbon Export in the Subarctic Northeast Pacific Ocean
The Outsized Role of Salps in Carbon Export in the Subarctic Northeast Pacific Ocean Open
Periodic blooms of salps (pelagic tunicates) can result in high export of organic matter, leading to an “outsized” role in the ocean's biological carbon pump (BCP). However, due to their episodic and patchy nature, salp blooms often go und…
View article: Multi-sensor observation of a rapidly dispersing micronekton thin layer
Multi-sensor observation of a rapidly dispersing micronekton thin layer Open
View article: EXPORTS North Atlantic eddy tracking
EXPORTS North Atlantic eddy tracking Open
The EXPORTS North Atlantic field campaign (EXPORTS-NA) of May 2021 used a diverse array of ship-based and autonomous platforms to measure and quantify processes leading to carbon export in the open ocean. The success of this field program …
View article: Monsoons, plumes, and blooms: intraseasonal variability of subsurface primary productivity in the Bay of Bengal
Monsoons, plumes, and blooms: intraseasonal variability of subsurface primary productivity in the Bay of Bengal Open
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…
View article: Tracing the path of carbon export in the ocean though DNA sequencing of individual sinking particles
Tracing the path of carbon export in the ocean though DNA sequencing of individual sinking particles Open
Surface phytoplankton communities were linked with the carbon they export into the deep ocean by comparing 18 S rRNA gene sequence communities from surface seawater and individually isolated sinking particles. Particles were collected in s…
View article: Alignment of optical backscatter measurements from the EXPORTS Northeast Pacific Field Deployment
Alignment of optical backscatter measurements from the EXPORTS Northeast Pacific Field Deployment Open
Backscattering of light is commonly measured by ocean observing systems, including ships and autonomous platforms, and is used as a proxy for the concentration of water column constituents such as phytoplankton and particulate carbon. Mult…
View article: A Visual Tour of Carbon Export by Sinking Particles
A Visual Tour of Carbon Export by Sinking Particles Open
To better quantify the ocean's biological carbon pump, we resolved the diversity of sinking particles that transport carbon into the ocean's interior, their contribution to carbon export, and their attenuation with depth. Sinking particles…
View article: Cloud shadows drive vertical migrations of deep-dwelling marine life
Cloud shadows drive vertical migrations of deep-dwelling marine life Open
Significance Our study provides evidence that, in addition to diel vertical migration, zooplankton residing at >300-m depth during the day perform high-frequency, vertical migrations due to light modulation by clouds. Using a water-followi…
View article: On Rates of Isopycnal Dispersion at the Submesoscale
On Rates of Isopycnal Dispersion at the Submesoscale Open
Past studies of dispersion with float‐pairs have indicated that they may remain close together for much longer when they equilibrate on the same isopycnal, presumably due to the reduced influence of vertical shear. To examine this question…
View article: Twilight Zone Observation Network: A Distributed Observation Network for Sustained, Real-Time Interrogation of the Ocean's Twilight Zone
Twilight Zone Observation Network: A Distributed Observation Network for Sustained, Real-Time Interrogation of the Ocean's Twilight Zone Open
The ocean's twilight zone (TZ) is a vast, globe-spanning region of the ocean. Home to myriad fishes and invertebrates, mid-water fishes alone may constitute 10 times more biomass than all current ocean wild-caught fisheries combined. Life …
View article: Size‐Differentiated Export Flux in Different Dynamical Regimes in the Ocean
Size‐Differentiated Export Flux in Different Dynamical Regimes in the Ocean Open
Export of Particulate Organic Carbon (POC) is mainly driven by gravitational sinking. Thus, traditionally, it is thought that larger, faster‐sinking particles make up most of the POC export flux. However, this need not be the case for part…
View article: A visual tour of carbon export by sinking particles
A visual tour of carbon export by sinking particles Open
To better quantify the ocean’s biological carbon pump, we resolved the diversity of sinking particles that transport carbon into the ocean’s interior, their contribution to carbon export, and their attenuation with depth. Sinking particles…
View article: Evolution of a Subducted Carbon‐Rich Filament on the Edge of the North Atlantic Gyre
Evolution of a Subducted Carbon‐Rich Filament on the Edge of the North Atlantic Gyre Open
The oceanic biological carbon pump encompasses a variety of mechanisms by which CO 2 , fixed into organic form by phytoplankton, is transported from the sunlit surface layers to the interior ocean. Here, we investigate submesoscale and mix…
View article: An operational overview of the EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) Northeast Pacific field deployment
An operational overview of the EXport Processes in the Ocean from RemoTe Sensing (EXPORTS) Northeast Pacific field deployment Open
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 go…