John Crusius (Former Employee)
Science and Products
Filter Total Items: 40
High-latitude dust in the Earth system High-latitude dust in the Earth system
Natural dust is often associated with hot, subtropical deserts, but significant dust events have been reported from cold, high latitudes. This review synthesizes current understanding of high-latitude (≥50°N and ≥40°S) dust source geography and dynamics and provides a prospectus for future research on the topic. Although the fundamental processes controlling aeolian dust emissions in...
Authors
Joanna E Bullard, Matthew Baddock, Tom Bradwell, John Crusius, Eleanor Darlington, Diego Gaiero, Santiago Gasso, Gudrun Gisladottir, Richard Hodgkins, Robert McCulloch, Cheryl NcKenna Neuman, Tom Mockford, Helena Stewart, Throstur Thorsteinsson
Substantial nitrous oxide emissions from intertidal sediments and groundwater in anthropogenically-impacted West Falmouth Harbor, Massachusetts Substantial nitrous oxide emissions from intertidal sediments and groundwater in anthropogenically-impacted West Falmouth Harbor, Massachusetts
Large N2O emissions were observed from intertidal sediments in a coastal estuary, West Falmouth Harbor, MA, USA. Average N2O emission rates from 41 chambers during summer 2008 were 10.7 mol N2O m(-2) h(-1)±4.43 μmol N2O m(-2) h(-1) (standard error). Emissions were highest from sediments within a known wastewater plume, where a maximum N2O emission rate was 155 μmol N2O m(-2) h(-1)...
Authors
Serena Moseman-Valtierra, Kevin D. Kroeger, John Crusius, Sandy Baldwin, Adrian G. Mann, Thomas W. Brooks, E. Pugh
Centennial changes in North Pacific anoxia linked to tropical trade winds Centennial changes in North Pacific anoxia linked to tropical trade winds
Climate warming is expected to reduce oxygen (O2) supply to the ocean and expand its oxygen minimum zones (OMZs). We reconstructed variations in the extent of North Pacific anoxia since 1850 using a geochemical proxy for denitrification (δ15N) from multiple sediment cores. Increasing δ15N since ~1990 records an expansion of anoxia, consistent with observed O2 trends. However, this was...
Authors
Curtis Deutsch, William Berelson, Robert Thunell, Thomas Weber, Caitlin Tems, James McManus, John Crusius, Taka Ito, Timothy Baumgartner, Vicente Ferreira, Jacob Mey, Alexander van Geen
Estuarine removal of glacial iron and implications for iron fluxes to the ocean Estuarine removal of glacial iron and implications for iron fluxes to the ocean
While recent work demonstrates that glacial meltwater provides a substantial and relatively labile flux of the micronutrient iron to oceans, the role of high-latitude estuary environments as a potential sink of glacial iron is unknown. Here we present the first quantitative description of iron removal in a meltwater-dominated estuary. We find that 85% of “dissolved” Fe is removed in the...
Authors
Andrew W. Schroth, John Crusius, Ian Hoyer, Robert Campbell
Continuous resistivity profiling data from Great South Bay, Long Island, New York Continuous resistivity profiling data from Great South Bay, Long Island, New York
An investigation of submarine aquifers adjacent to the Fire Island National Seashore and Long Island, New York was conducted to assess the importance of submarine groundwater discharge as a potential nonpoint source of nitrogen delivery to Great South Bay. Over 200 kilometers of continuous resistivity profiling data were collected to image the fresh-saline groundwater interface in...
Authors
V.A. Cross, J.F. Bratton, K.D. Kroeger, John Crusius, C.R. Worley
Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York
An investigation of coastal groundwater systems was performed along the North Shore of Long Island, New York, during May 2008 to constrain nutrient delivery to Northport Harbor and Manhasset Bay by delineating locations of likely groundwater discharge. The embayments are bounded by steep moraines and are underlain by thick, fine-grained sediments deposited in proglacial lakes during the...
Authors
V.A. Cross, J.F. Bratton, John Crusius, K.D. Kroeger, C.R. Worley
Science and Products
Filter Total Items: 40
High-latitude dust in the Earth system High-latitude dust in the Earth system
Natural dust is often associated with hot, subtropical deserts, but significant dust events have been reported from cold, high latitudes. This review synthesizes current understanding of high-latitude (≥50°N and ≥40°S) dust source geography and dynamics and provides a prospectus for future research on the topic. Although the fundamental processes controlling aeolian dust emissions in...
Authors
Joanna E Bullard, Matthew Baddock, Tom Bradwell, John Crusius, Eleanor Darlington, Diego Gaiero, Santiago Gasso, Gudrun Gisladottir, Richard Hodgkins, Robert McCulloch, Cheryl NcKenna Neuman, Tom Mockford, Helena Stewart, Throstur Thorsteinsson
Substantial nitrous oxide emissions from intertidal sediments and groundwater in anthropogenically-impacted West Falmouth Harbor, Massachusetts Substantial nitrous oxide emissions from intertidal sediments and groundwater in anthropogenically-impacted West Falmouth Harbor, Massachusetts
Large N2O emissions were observed from intertidal sediments in a coastal estuary, West Falmouth Harbor, MA, USA. Average N2O emission rates from 41 chambers during summer 2008 were 10.7 mol N2O m(-2) h(-1)±4.43 μmol N2O m(-2) h(-1) (standard error). Emissions were highest from sediments within a known wastewater plume, where a maximum N2O emission rate was 155 μmol N2O m(-2) h(-1)...
Authors
Serena Moseman-Valtierra, Kevin D. Kroeger, John Crusius, Sandy Baldwin, Adrian G. Mann, Thomas W. Brooks, E. Pugh
Centennial changes in North Pacific anoxia linked to tropical trade winds Centennial changes in North Pacific anoxia linked to tropical trade winds
Climate warming is expected to reduce oxygen (O2) supply to the ocean and expand its oxygen minimum zones (OMZs). We reconstructed variations in the extent of North Pacific anoxia since 1850 using a geochemical proxy for denitrification (δ15N) from multiple sediment cores. Increasing δ15N since ~1990 records an expansion of anoxia, consistent with observed O2 trends. However, this was...
Authors
Curtis Deutsch, William Berelson, Robert Thunell, Thomas Weber, Caitlin Tems, James McManus, John Crusius, Taka Ito, Timothy Baumgartner, Vicente Ferreira, Jacob Mey, Alexander van Geen
Estuarine removal of glacial iron and implications for iron fluxes to the ocean Estuarine removal of glacial iron and implications for iron fluxes to the ocean
While recent work demonstrates that glacial meltwater provides a substantial and relatively labile flux of the micronutrient iron to oceans, the role of high-latitude estuary environments as a potential sink of glacial iron is unknown. Here we present the first quantitative description of iron removal in a meltwater-dominated estuary. We find that 85% of “dissolved” Fe is removed in the...
Authors
Andrew W. Schroth, John Crusius, Ian Hoyer, Robert Campbell
Continuous resistivity profiling data from Great South Bay, Long Island, New York Continuous resistivity profiling data from Great South Bay, Long Island, New York
An investigation of submarine aquifers adjacent to the Fire Island National Seashore and Long Island, New York was conducted to assess the importance of submarine groundwater discharge as a potential nonpoint source of nitrogen delivery to Great South Bay. Over 200 kilometers of continuous resistivity profiling data were collected to image the fresh-saline groundwater interface in...
Authors
V.A. Cross, J.F. Bratton, K.D. Kroeger, John Crusius, C.R. Worley
Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York Continuous resistivity profiling data from Northport Harbor and Manhasset Bay, Long Island, New York
An investigation of coastal groundwater systems was performed along the North Shore of Long Island, New York, during May 2008 to constrain nutrient delivery to Northport Harbor and Manhasset Bay by delineating locations of likely groundwater discharge. The embayments are bounded by steep moraines and are underlain by thick, fine-grained sediments deposited in proglacial lakes during the...
Authors
V.A. Cross, J.F. Bratton, John Crusius, K.D. Kroeger, C.R. Worley