Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Luke J. Coletti"'
Autor:
Hans W. Jannasch, J. Timothy Pennington, Gene Massion, Joshua N. Plant, Luke J. Coletti, Mbari, Francisco P. Chavez, Kenneth S. Johnson, Carole M. Sakamoto, Tanya L. Maurer
Publikováno v:
Oceanography. 30:114-127
Publikováno v:
Limnology and Oceanography: Methods. 15:897-902
The most accurate calculation of nitrate concentration from the ultraviolet (UV) absorption spectrum of seawater requires that the absorption signal due to bromide in seawater be removed before nitrate concentrations are computed. Recent work suggest
Autor:
Stephen C. Riser, Nils Haëntjens, Emmanuel Boss, Kenneth S. Johnson, Hans W. Jannasch, Carole M. Sakamoto, Luke J. Coletti, Jorge L. Sarmiento, Nancy L. Williams, Lynne D. Talley, Joshua N. Plant, Dana D. Swift
Publikováno v:
Journal Of Geophysical Research-oceans (2169-9275) (Amer Geophysical Union), 2017-08, Vol. 122, N. 8, P. 6416-6436
The Southern Ocean Carbon and Climate Observations and Modeling (SOCCOM) program has begun deploying a large array of biogeochemical sensors on profiling floats in the Southern Ocean. As of February 2016, 86 floats have been deployed. Here the focus
Autor:
Hans W. Jannasch, Andrew G. Dickson, Todd R. Martz, Luke J. Coletti, Yuichiro Takeshita, Kenneth S. Johnson
Publikováno v:
Marine Chemistry. 188:1-5
Equimolar Tris (2-amino-2-hydroxymethyl-propane-1,3-diol) buffer prepared in artificial seawater media is a widely accepted pH standard for oceanographic pH measurements, though its change in pH over pressure is largely unknown. The change in volume
Autor:
Carole M. Sakamoto, Kenneth S. Johnson, Dana D. Swift, Stephen C. Riser, Luke J. Coletti, Hans W. Jannasch, Joshua N. Plant
Publikováno v:
Global Biogeochemical Cycles. 30:859-879
Six profiling floats equipped with nitrate and oxygen sensors were deployed at Ocean Station P in the Gulf of Alaska. The resulting six calendar years and 10 float years of nitrate and oxygen data were used to determine an average annual cycle for ne
Autor:
Luke J. Coletti, Hans W. Jannasch, Joseph K. Warren, Kenneth S. Johnson, Peter Walz, Yuichiro Takeshita
Publikováno v:
Marine Chemistry. 223:103801
A recent analysis of full water column hydrographic data revealed a pH-dependent discrepancy between spectrophotometrically measured pH using purified meta-cresol purple and pH calculated from dissolved inorganic carbon (DIC) and total alkalinity (TA
Autor:
Richard J.H. Smith, Kenneth S. Johnson, Luke J. Coletti, Laura Tourte, Thomas G. Bottoms, Sabastian Castro Bustamante, Timothy K. Hartz, Michael Cahn
Publikováno v:
Hartz, Tim; Smith, Richard; Cahn, Mike; Bottoms, Thomas; Bustamante, Sabastian Castro; Tourte, Laura; et al.(2017). Wood chip denitrification bioreactors can reduce nitrate in tile drainage. California Agriculture, 71(1). doi: 10.3733/ca.2017a0007. Retrieved from: http://www.escholarship.org/uc/item/5xb5g3p5
California Agriculture, Vol 71, Iss 01, Pp 41-47 (2017)
California Agriculture, Vol 71, Iss 01, Pp 41-47 (2017)
Widespread contamination of surface water with nitrate-nitrogen (NO3-N) has led to increasing regulatory pressure to minimize NO3-N release from agricultural operations. We evaluated the use of wood chip denitrification bioreactors to remove NO3-N fr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3a94bf137e71e5bf5eb1206b90f46958
http://www.escholarship.org/uc/item/5xb5g3p5
http://www.escholarship.org/uc/item/5xb5g3p5
Autor:
Carole M. Sakamoto, Kenneth S. Johnson, Stephen C. Riser, Dana D. Swift, Luke J. Coletti, Hans W. Jannasch
Publikováno v:
Journal of Atmospheric and Oceanic Technology. 30:1854-1866
Reagent-free optical nitrate sensors [in situ ultraviolet spectrophotometer (ISUS)] can be used to detect nitrate throughout most of the ocean. Although the sensor is a relatively high-power device when operated continuously (7.5 W typical), the inst
Autor:
Luke J. Coletti, Robert J. Carlson, Kenneth S. Johnson, Yuichiro Takeshita, Todd R. Martz, Hans W. Jannasch, James G. Connery, Virginia A. Elrod
Publikováno v:
Analytical chemistry. 88(6)
Increasing atmospheric carbon dioxide is driving a long-term decrease in ocean pH which is superimposed on daily to seasonal variability. These changes impact ecosystem processes, and they serve as a record of ecosystem metabolism. However, the tempo
Autor:
Luke J. Coletti, Steve E. Fitzwater, Hans W. Jannasch, James P. Barry, C. Lovera, Kenneth S. Johnson
Publikováno v:
Limnology and Oceanography: Methods. 9:543-553
Chemical fluxes into and out of permeable seafloor sediments, such as those found on much of the continental shelf, are difficult to measure using conventional techniques. To overcome this difficulty, the eddy correlation method was adapted by oceano