Allan H. Devol
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View article: Contributions of Vertically Migrating Metazoans to Sinking and Suspended Particulate Matter Fuel N<sub>2</sub> Production in the Eastern Tropical North Pacific Oxygen Deficient Zone
Contributions of Vertically Migrating Metazoans to Sinking and Suspended Particulate Matter Fuel N<sub>2</sub> Production in the Eastern Tropical North Pacific Oxygen Deficient Zone Open
Oxygen Deficient Zones (ODZs) are the largest pelagic sinks of N containing nutrients in the ocean. The offshore Eastern Tropical North Pacific (ETNP) ODZ has been shown to be limited by organic matter. We propose zooplankton/forage fish a…
View article: Rapid expansion of fixed nitrogen deficit in the eastern Pacific Ocean revealed by 50 year time series
Rapid expansion of fixed nitrogen deficit in the eastern Pacific Ocean revealed by 50 year time series Open
The nitrogen deficit in the largest Oxygen Deficient Zone (ODZ) has increased over 50 years, indicating a 30% increase in ODZ strength• The maximum fixed N loss of the core ODZ (σθ 26.2-26.8kg m -3 ) is significantly different (p=0.03)from…
View article: Rapid expansion of fixed nitrogen deficit in the eastern Pacific Ocean revealed by 50 year time series
Rapid expansion of fixed nitrogen deficit in the eastern Pacific Ocean revealed by 50 year time series Open
Climate change is expected to increase the strength of ocean Oxygen Deficient Zones (ODZs), but we lack detailed understanding of the temporal or spatial variability of these ODZs. A fifty-year time series in the Eastern Tropical North Pac…
View article: ETNP_ODZ_time_series
ETNP_ODZ_time_series Open
Time series of data corresponding to Evans et al. (2022) "Natural variability and expansion of the nitrogen deficit within the Eastern Tropical North Pacific Oxygen Deficient Zone", containing secondary quality controlled data of 8 cruises…
View article: ETNP_ODZ_time_series
ETNP_ODZ_time_series Open
Time series of data corresponding to Evans et al. (2022) "Natural variability and expansion of the nitrogen deficit within the Eastern Tropical North Pacific Oxygen Deficient Zone", containing secondary quality controlled data of 8 cruises…
View article: Prolific nitrite re-oxidation across the Eastern Tropical North Pacific Ocean
Prolific nitrite re-oxidation across the Eastern Tropical North Pacific Ocean Open
Marine Oxygen Deficient Zones serve as hotspots for the loss of fixed nitrogen for the world’s oceans, and fixed nitrogen limits primary productivity in large expanses of the ocean. This fixed nitrogen loss occurs primarily through denitri…
View article: Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone
Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone Open
Earth and Space Science Open Archive This work has been accepted for publication in Global Biogeochemical Cycles. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. Learn mor…
View article: Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone
Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone Open
Earth and Space Science Open Archive This work has been accepted for publication in Global Biogeochemical Cycles. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. Learn mor…
View article: Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone
Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone Open
Earth and Space Science Open Archive This work has been accepted for publication in Global Biogeochemical Cycles. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. Learn mor…
View article: Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone
Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone Open
Earth and Space Science Open Archive This work has been accepted for publication in Global Biogeochemical Cycles. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. Learn mor…
View article: Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone
Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone Open
Earth and Space Science Open Archive This work has been accepted for publication in Global Biogeochemical Cycles. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. Learn mor…
View article: Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone
Slow particle remineralization, rather than suppressed disaggregation, drives efficient flux transfer through the Eastern Tropical North Pacific Oxygen Deficient Zone Open
Earth and Space Science Open Archive This work has been accepted for publication in Global Biogeochemical Cycles. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary. Learn mor…
View article: Expansion of the eastern North Pacific OMZ and the associated denitrification regime
Expansion of the eastern North Pacific OMZ and the associated denitrification regime Open
<p>&#160;</p><p>At this point ocean deoxygenation is well documented, including in oxygen minimum zones (OMZs).&#160; Within the large OMZs of the Arabian Sea and eastern Pacific are imbedded areas where oxygen co…
View article: Cyanobacteria and cyanophage contributions to carbon and nitrogen cycling in an oligotrophic oxygen-deficient zone
Cyanobacteria and cyanophage contributions to carbon and nitrogen cycling in an oligotrophic oxygen-deficient zone Open
Up to half of marine N losses occur in oxygen-deficient zones (ODZs). Organic matter flux from productive surface waters is considered a primary control on N2 production. Here we investigate the offshore Eastern Tropical North Pacific (ETN…
View article: Seasonal carbonate chemistry variability in marine surface waters of the US Pacific Northwest
Seasonal carbonate chemistry variability in marine surface waters of the US Pacific Northwest Open
Fingerprinting ocean acidification (OA) in US West Coast waters is extremely challenging due to the large magnitude of natural carbonate chemistry variations common to these regions. Additionally, quantifying a change requires information …
View article: Seasonal Carbonate Chemistry Variability in Marine Surface Waters of the Pacific Northwest
Seasonal Carbonate Chemistry Variability in Marine Surface Waters of the Pacific Northwest Open
Fingerprinting ocean acidification (OA) in U.S. West Coast waters is extremely challenging due to the large magnitude of natural carbonate chemistry variations common to these regions. Additionally, quantifying a change requires informatio…
View article: Seasonal Carbonate Chemistry Variability In Marine Surface Waters Of The Pacific Northwest. Data Archive.
Seasonal Carbonate Chemistry Variability In Marine Surface Waters Of The Pacific Northwest. Data Archive. Open
This archive includes two .nc files (NetCDF format) containing observational data (discrete and mooring) from marine surface waters of the Pacific Northwest that have not yet been submitted to a long-term data repository. These data contri…
View article: Seasonal Carbonate Chemistry Variability In Marine Surface Waters Of The Pacific Northwest. Data Archive.
Seasonal Carbonate Chemistry Variability In Marine Surface Waters Of The Pacific Northwest. Data Archive. Open
This archive includes two .nc files (NetCDF format) containing observational data (discrete and mooring) from marine surface waters of the Pacific Northwest that have not yet been submitted to a long-term data repository. These data contri…
View article: Niche Partitioning of the N Cycling Microbial Community of an Offshore Oxygen Deficient Zone
Niche Partitioning of the N Cycling Microbial Community of an Offshore Oxygen Deficient Zone Open
Microbial communities in marine oxygen deficient zones (ODZs) are responsible for up to half of marine N loss through conversion of nutrients to N2O and N2. This N loss is accomplished by a consortium of diverse microbes, many of which rem…
View article: Stress response of a marine ammonia-oxidizing archaeon informs physiological status of environmental populations
Stress response of a marine ammonia-oxidizing archaeon informs physiological status of environmental populations Open
High representation by ammonia-oxidizing archaea (AOA) in marine systems is consistent with their high affinity for ammonia, efficient carbon fixation, and copper (Cu)-centric respiratory system. However, little is known about their respon…
View article: Relative impacts of light, temperature, and reactive oxygen on thaumarchaeal ammonia oxidation in the North Pacific Ocean
Relative impacts of light, temperature, and reactive oxygen on thaumarchaeal ammonia oxidation in the North Pacific Ocean Open
Thaumarchaeota are implicated as the major ammonia oxidizers in the ocean. However, the influence of various abiotic factors in determining their distribution and activity in the upper ocean remain largely unclear. Here, we examined the in…
View article: Nutrient and phytoplankton dynamics on the inner shelf of the eastern <scp>B</scp>ering <scp>S</scp>ea
Nutrient and phytoplankton dynamics on the inner shelf of the eastern <span>B</span>ering <span>S</span>ea Open
In the Bering Sea, the nitrogen cycle near Nunivak Island is complicated due to limited nutrient replenishment across this broad shelf, and substantial nitrogen loss through sedimentary processes. While diffusion at the inner front may per…
View article: Influence of oxygen availability on the activities of ammonia‐oxidizing archaea
Influence of oxygen availability on the activities of ammonia‐oxidizing archaea Open
Summary Recent studies point to the importance of oxygen (O 2 ) in controlling the distribution and activity of marine ammonia‐oxidizing archaea (AOA), one of the most abundant prokaryotes in the ocean. The AOA are associated with regions …
View article: Two distinct pools of B <sub>12</sub> analogs reveal community interdependencies in the ocean
Two distinct pools of B <sub>12</sub> analogs reveal community interdependencies in the ocean Open
Significance Cobalamin (vitamin B 12 )-dependent organisms span all domains of life, making procurement of the vitamin from the few prokaryotic producers an essential function in organismal interactions. Yet not all key producers of cobala…
View article: Expansion of denitrification and anoxia in the eastern tropical North Pacific from 1972 to 2012
Expansion of denitrification and anoxia in the eastern tropical North Pacific from 1972 to 2012 Open
The eastern tropical North Pacific (ETNP) is a large region of anoxic water that hosts widespread water column N loss (denitrification). There is some disagreement about the long‐term trends of denitrification and anoxia and long‐term stud…
View article: A multiproxy approach to understanding the "enhanced" flux of organic matter through the oxygen-deficient waters of the Arabian Sea
A multiproxy approach to understanding the "enhanced" flux of organic matter through the oxygen-deficient waters of the Arabian Sea Open
Free-drifting sediment net traps were deployed 14 times at depths between 80 and 500 m for 1–3 days each during the late monsoon–intermonsoon transition in the central Arabian Sea. Two locations (19.5 and 15.5° N) were within the permanent…
View article: Revisiting nitrification in the Eastern Tropical <scp>S</scp>outh <scp>P</scp>acific: A focus on controls
Revisiting nitrification in the Eastern Tropical <span>S</span>outh <span>P</span>acific: A focus on controls Open
Nitrification, the oxidation of ammonium ( ) to nitrite ( ) and to nitrate ( ), is a component of the nitrogen (N) cycle internal to the fixed N pool. In oxygen minimum zones (OMZs), which are hotspots for oceanic fixed N loss, nitrificati…
View article: Ammonia and nitrite oxidation in the Eastern Tropical North Pacific
Ammonia and nitrite oxidation in the Eastern Tropical North Pacific Open
Nitrification plays a key role in the marine nitrogen (N) cycle, including in oceanic oxygen minimum zones (OMZs), which are hot spots for denitrification and anaerobic ammonia oxidation (anammox). Recent evidence suggests that nitrificati…
View article: A multiproxy approach to understanding the "enhanced" flux of organic matter through the oxygen deficient waters of the Arabian Sea
A multiproxy approach to understanding the "enhanced" flux of organic matter through the oxygen deficient waters of the Arabian Sea Open
Free-drifting sediment net traps were deployed 14 times at depths between 80 and 500 m for 1–3 days each during the late monsoon/intermonsoon transition in the central Arabian Sea. Two locations (19.5 and 15.5° N) were within the permanent…