Robert T. Letscher
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View article: A time series analysis of transparent exopolymer particle distributions and C : N stoichiometry in the subtropical North Pacific: a key process in net community production and preformed nitrate anomalies?
A time series analysis of transparent exopolymer particle distributions and C : N stoichiometry in the subtropical North Pacific: a key process in net community production and preformed nitrate anomalies? Open
Within the oligotrophic subtropical oceans, summertime dissolved inorganic carbon drawdown despite nutrient limitation in surface waters and subsurface oxygen consumption in the absence of Redfieldian stoichiometric nitrate release are two…
View article: Simulating Marine Ecosystem Dynamics and Biogeochemical Cycling With Multiple Plankton Functional Types
Simulating Marine Ecosystem Dynamics and Biogeochemical Cycling With Multiple Plankton Functional Types Open
Current representations of marine ecosystems in Earth System Models are greatly simplified, neglecting key interactions between dynamic food webs, biogeochemistry, and climate change. We use the Marine Biogeochemistry Library code base wit…
View article: Oligotrophic Ocean New Production Supported by Lateral Transport of Dissolved Organic Nutrients
Oligotrophic Ocean New Production Supported by Lateral Transport of Dissolved Organic Nutrients Open
Dissolved organic nitrogen (DON) and phosphorus (DOP) are potential nutrient sources to sustain productivity in the oligotrophic ocean where inorganic nutrient concentrations are low. Variations in the carbon(C):nitrogen(N):phosphorus(P) s…
View article: Phytoplankton variable stoichiometry modifies key biogeochemical fluxes and the functioning of the ocean biological pump
Phytoplankton variable stoichiometry modifies key biogeochemical fluxes and the functioning of the ocean biological pump Open
Ocean biota absorb carbon at the surface and export some to the ocean interior via the biological pump, affecting surface carbon, air-sea CO₂ exchange, and climate. Marine phytoplankton growth is often limited by nutrients (nitrogen, phosp…
View article: Centennial‐Scale Storage of DOC Within Arctic Ocean Deep Waters Controlled by Subzero Temperatures
Centennial‐Scale Storage of DOC Within Arctic Ocean Deep Waters Controlled by Subzero Temperatures Open
Refractory dissolved organic carbon (RDOC) represents the second largest reservoir for ocean carbon storage, the bulk of which is held in the deep ocean, out of contact with the atmosphere on decadal to millennial timescales. Thus, underst…
View article: Phytoplankton variable stoichiometry modifies key biogeochemical fluxes and the functioning of the ocean biological pump
Phytoplankton variable stoichiometry modifies key biogeochemical fluxes and the functioning of the ocean biological pump Open
Ocean biota take up carbon in surface waters and export some of it to the ocean interior (the biological pump), modifying surface carbon concentrations, air-sea CO2 exchange, and thus, Earth's climate. The growth of marine phytoplankton is…
View article: A time series analysis of transparent exopolymer particle distributions and C:N stoichiometry in the subtropical North Pacific: a key process in net community production and preformed nitrate anomalies?
A time series analysis of transparent exopolymer particle distributions and C:N stoichiometry in the subtropical North Pacific: a key process in net community production and preformed nitrate anomalies? Open
Within the oligotrophic subtropical oceans, summertime DIC drawdown despite nutrient limitation in surface waters and subsurface oxygen consumption in the absence of Redfieldian stoichiometric nitrate release are two phenomena still awaiti…
View article: A simple method for the quantification of amidic bioavailable dissolved organic nitrogen in seawater
A simple method for the quantification of amidic bioavailable dissolved organic nitrogen in seawater Open
A targeted method for the quantification of bioavailable amide N found in marine DON (bDON) is presented. The method utilizes mild acid hydrolysis to convert amide N found in proteins and N ‐acetyl amino polysaccharides to primary amine co…
View article: Issue Information
Issue Information Open
No abstract is available for this article.
View article: Drivers of Ocean Iron Stress Variability in High-Nutrient, Low-Chlorophyll Regions from Ocean Color
Drivers of Ocean Iron Stress Variability in High-Nutrient, Low-Chlorophyll Regions from Ocean Color Open
Determining the seasonal, interannual, and decadal trends of Fe stress in oceanic regions helps quantify the variability in marine nutrient limitations. However, seasonally resolved time-series measurements of dissolved Fe from 3 high-nutr…
View article: Global Patterns of Surface Ocean Dissolved Organic Matter Stoichiometry
Global Patterns of Surface Ocean Dissolved Organic Matter Stoichiometry Open
Surface ocean marine dissolved organic matter (DOM) serves as an important reservoir of carbon (C), nitrogen (N), and phosphorus (P) in the global ocean, and is produced and consumed by both autotrophic and heterotrophic communities. While…
View article: Binned dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and dissolved organic phosphorus (DOP) concentration observations in the ocean
Binned dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and dissolved organic phosphorus (DOP) concentration observations in the ocean Open
Here we provided binned dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and dissolved organic phosphorus (DOP) concentration observations in the ocean used for manuscript "Global patterns of surface ocean dissolved organi…
View article: Binned dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and dissolved organic phosphorus (DOP) concentration observations in the ocean
Binned dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and dissolved organic phosphorus (DOP) concentration observations in the ocean Open
Here we provided binned dissolved organic carbon (DOC), dissolved organic nitrogen (DON), and dissolved organic phosphorus (DOP) concentration observations in the ocean used for manuscript "Global patterns of surface ocean dissolved organi…
View article: Biodiversity and Stoichiometric Plasticity Increase Pico‐Phytoplankton Contributions to Marine Net Primary Productivity and the Biological Pump
Biodiversity and Stoichiometric Plasticity Increase Pico‐Phytoplankton Contributions to Marine Net Primary Productivity and the Biological Pump Open
Earth System Models generally predict increasing upper ocean stratification from 21st century warming, which will cause a decrease in the vertical nutrient flux forcing declines in marine net primary productivity (NPP) and carbon export. R…
View article: PICO simulation of the CESM-BEC
PICO simulation of the CESM-BEC Open
This is ocean biogeochemistry tracer and tracer flux output from the PICO simulation of the Community Earth System Model, Biogeochemical Ecosystem Cycling (CESM-BEC) model as detailed in Letscher et al. (2023) in Global Biogeochemical Cycl…
View article: PICO simulation of the CESM-BEC
PICO simulation of the CESM-BEC Open
This is ocean biogeochemistry tracer and tracer flux output from the PICO simulation of the Community Earth System Model, Biogeochemical Ecosystem Cycling (CESM-BEC) model as detailed in Letscher et al. (2023) in Global Biogeochemical Cycl…
View article: Global patterns of surface ocean dissolved organic matter stoichiometry
Global patterns of surface ocean dissolved organic matter stoichiometry Open
Surface ocean marine dissolved organic matter (DOM) serves as an important reservoir of carbon (C), nitrogen (N), and phosphorus (P) in the global ocean, and is produced and consumed by both autotrophic and heterotrophic communities. While…
View article: Pico-phytoplankton contribute half of global marine carbon export
Pico-phytoplankton contribute half of global marine carbon export Open
Earth System Models generally predict increasing upper ocean stratification from 21st century planetary warming, which will cause a decrease in the vertical nutrient flux resulting in declining marine net primary productivity (NPP) and car…
View article: Regionally Variable Contribution of Dissolved Organic Phosphorus to Marine Annual Net Community Production
Regionally Variable Contribution of Dissolved Organic Phosphorus to Marine Annual Net Community Production Open
Marine dissolved organic phosphorus (DOP) serves as an organic nutrient to marine autotrophs, sustaining a portion of annual net community production (ANCP). Numerical models of ocean circulation and biogeochemistry have diagnosed the magn…
View article: Regionally variable contribution of dissolved organic phosphorus to marine annual net community production
Regionally variable contribution of dissolved organic phosphorus to marine annual net community production Open
Marine dissolved organic phosphorus (DOP) can serve as an organic nutrient to marine autotrophs, helping to sustain a portion of annual net community production (ANCP). Numerical models of ocean circulation and biogeochemistry have diagnos…
View article: Marine phytoplankton resilience may moderate oligotrophic ecosystem responses and biogeochemical feedbacks to climate change
Marine phytoplankton resilience may moderate oligotrophic ecosystem responses and biogeochemical feedbacks to climate change Open
Are the oceans turning into deserts? Rising temperature, increasing surface stratification, and decreasing vertical inputs of nutrients are expected to cause an expansion of warm, nutrient deplete ecosystems. Such an expansion is predicted…
View article: Simulations With the Marine Biogeochemistry Library (MARBL)
Simulations With the Marine Biogeochemistry Library (MARBL) Open
The Marine Biogeochemistry Library (MARBL) is a prognostic ocean biogeochemistry model that simulates marine ecosystem dynamics and the coupled cycles of carbon, nitrogen, phosphorus, iron, silicon, and oxygen. MARBL is a component of the …
View article: DOP concentration observations from the global ocean between 1990 and 2021 (DOP N2 fixation and export production project)
DOP concentration observations from the global ocean between 1990 and 2021 (DOP N2 fixation and export production project) Open
DOP (Dissolved Organic Phosphorus) concentration observations in the global ocean between 1990 and 2021 over multiple deployments. DOP concentrations in this study were calculated as the difference between TDP concentrations and PO43- conc…