A5053469005- Marine and coastal ecosystems
- Geology and Paleoclimatology Research
- Geochemistry and Elemental Analysis
- Marine Biology and Ecology Research
- Oceanographic and Atmospheric Processes
- Heavy metals in environment
- Methane Hydrates and Related Phenomena
- Mercury impact and mitigation studies
- Groundwater and Isotope Geochemistry
- Atmospheric chemistry and aerosols
- Analytical chemistry methods development
- Geochemistry and Geologic Mapping
- Analytical Chemistry and Sensors
- Radioactivity and Radon Measurements
- Arctic and Antarctic ice dynamics
- Microbial Community Ecology and Physiology
- Isotope Analysis in Ecology
- Electrochemical Analysis and Applications
- Geological and Geochemical Analysis
- Radioactive contamination and transfer
- Atmospheric and Environmental Gas Dynamics
- Radioactive element chemistry and processing
- earthquake and tectonic studies
- Marine and fisheries research
- Water Quality Monitoring and Analysis
University of Hawaiʻi at Mānoa
2010-2024
University of Hawaii System
2013-2024
Japan Agency for Marine-Earth Science and Technology
2021
Woods Hole Oceanographic Institution
2013-2021
Goddard Space Flight Center
2018
University of California, Irvine
2008
Honolulu University
2003
Massachusetts Institute of Technology
1983-1996
Planetary Science Institute
1980-1992
University of Southampton
1980
Abstract A major surface circulation feature of the Arctic Ocean is Transpolar Drift (TPD), a current that transports river‐influenced shelf water from Laptev and East Siberian Seas toward center basin Fram Strait. In 2015, international GEOTRACES program included high‐resolution pan‐Arctic survey carbon, nutrients, suite trace elements isotopes (TEIs). The cruises bisected TPD at two locations in central basin, which were defined by maxima meteoric dissolved organic carbon concentrations...
In nearly a dozen open‐ocean fertilization experiments conducted by more than 100 researchers from 20 countries, adding iron at the sea surface has led to distinct increases in photosynthesis rates and biomass. These confirmed hypothesis proposed late John Martin [ , 1990] that dissolved concentration is key variable controls phytoplankton processes ocean waters However, measurement of seawater remains difficult task Bruland Rue 2001] with significant interlaboratory differences apparent...
Six vent fields sampled at 13°–11°N, East Pacific Rise (EPR) in May 1984 exhibit large interfield variations and a much wider range of chemical compositions than previously observed 21°N. Measured p H 25°C are acidic, ranging from 3.1 to 3.7. Sodium chloride vary 40% lower 30% higher seawater. Iron concentrations 2 10 mmol/kg, compared with 0.7–2.5 mmol/kg Other sulfide‐forming metals (Cu, Zn, Cd, Pb) generally 11°–13°N Reliable temperature measurements were obtained only two the six vents...
A time series study of four hot spring fields at 21°N on the East Pacific Rise demonstrates that solution compositions mid‐ocean ridge hydrothermal vents are stable a decadal scale. The Ocean Bottom Seismometer (OBS), National Geographic Smoker (NGS), and South West (SW) show no significant changes in major element composition their end‐member fluids since 1979. Two vents, OBS SW, have maintained exit temperatures near 350°C NGS vent has remained close to 270°C 1981 after cooling from Only...
We present full‐depth zonal sections of total dissolved cobalt, iron, manganese, and labile cobalt from the South Atlantic Ocean. A basin‐scale plume African coast appeared to be a major source metals this region, with high concentrations in oxygen minimum zone Angola Dome extending 2500 km into subtropical gyre. Metal were elevated along coastal shelf, likely due reductive dissolution resuspension particulate matter. Linear relationships between N 2 O, O , as well low surface aluminum...
The GEOTRACES Intermediate Data Product 2014 (IDP2014) is the first publicly available data product of international programme, and contains measured quality controlled before end 2013. It consists two parts: (1) a compilation digital for more than 200 trace elements isotopes (TEIs) as well classical hydrographic parameters, (2) eGEOTRACES Electronic Atlas providing strongly inter-linked on-line atlas including 300 section plots 90 animated 3D scenes. IDP2014 covers Atlantic, Arctic, Indian...
Deposition of continental mineral aerosols (dust) in the Eastern Tropical North Atlantic Ocean, between coast Africa and Mid-Atlantic Ridge, was estimated using several strategies based on measurement aerosols, trace metals dissolved seawater, particulate material filtered from water column, particles collected by sediment traps sediments. Most data used this synthesis involve samples during US GEOTRACES expeditions 2010 2011, although some results literature are also used. Dust deposition...
The concentration of dissolved Al in surface waters from various oceanic regimes is used a simple model to calculate the annual amount dust deposited ocean. Calculated values range 0.015 9.9 g m −2 yr −1 . Comparison these calculated depositions with independent deposition estimates obtained direct measurements, suspended atmospheric loads, or sediment traps show remarkably good agreement over approximately 3 orders magnitude. In regions where between and other weakest, it anticipated that...
A comprehensive, joint Soviet‐American study of the chemistry Lake Baikal, world’s deepest (1,632 m) lake, was carried out in July 1988. In this paper, we report major, minor, and preliminary trace element concentrations for three profiles obtained at or near central part major basins lake. With exception Ba, distributions minor elements were homogeneous, displaying no variations greater than analytical uncertainties. Average µ mol kg −1 (1 SD) are titration alkalinity = 1,093(6), SO 4 2−...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorometric Determination of Al in Seawater by Flow Injection Analysis with In-Line PreconcentrationJoseph A. Resing and C. I. MeasuresCite this: Anal. Chem. 1994, 66, 22, 4105–4111Publication Date (Print):November 15, 1994Publication History Published online1 May 2002Published inissue 15 November 1994https://doi.org/10.1021/ac00094a039RIGHTS & PERMISSIONSArticle Views307Altmetric-Citations106LEARN ABOUT THESE METRICSArticle Views are the...