Associate
Professor Department
of Marine Science 1020 Balch Blvd. Stennis Space Center, MS39529-9904 phone: (228) 688-1176 fax: 228-688-1121 laodong.guo@usm.edu
Ph.D.
Chemical Oceanography, Texas A&M University,
1995
RESEARCH INTERESTS
Biogeochemical
cycling of natural organic carbon and nutrients in aquatic
systems
Aquatic
colloids/nanoparticles and their role in governing the fate/transport/bioavailability
of chemical species
Isotope
geochemistry
Biogeochemical processes
at land/ocean, particle/water, and biota/water
interfaces
Biogeochemical consequences of climate
and environmental changes
COURSES
MAR 651 - Marine Organic Geochemistry (3 credit hours)
MAR 683 - Isotope Biogeochemistry (3 credit hours)
MAR 691 - Aquatic Colloids and Nanoparticles (1 credit hour)
SELECTED PUBLICATIONS
Guo, L., Warnken, K.W. and Santschi, P.H. 2007. Retention behavior of dissolved uranium during ultrafiltration, implications for colloidal U in surface waters. Marine Chemistry, 107, 156-166.
Guo, L., Ping, C.L., Macdonald, R.W. 2007. Mobilization pathways of organic carbon from permafrost to arctic rivers in a changing climate. Geophysical Research Letters, 34(13), L13603, doi10.1029/2007/GL030689.
Guo, L. and Santschi, P.H. 2006. Ultrafiltration and its applications to sampling and characterization of aquatic colloids. In "Environmental Colloids and Particles" Wilkinson, K. and Lead, J. (Eds), International Union of Pure and Applied Chemistry (IUPAC) Series, John Wiley, Chapter 4, pp159-221 .
Guo, L., and Macdonald, R.W. 2006. Source and transport of terrigenous organic matter in the upper Yukon River: evidence from isotope (13C, 14C and 15N) composition of dissolved, colloidal and particulate phases. Global Biogeochemical Cycles, 20(2), GB2011, doi: 10.1029/2005GB002593.
Guo,
L., Tanaka, T. Wang, D., Tanaka, N.
and Murata, A. 2004. Distributions, speciation
and stable isotope composition of organic matter
in the southeastern Bering Sea . Marine Chemistry
, 91: 211-226.
Guo,
L., Semiletov, I., Gustafsson, O.,
Ingri, J. Andersson, P. Dudarev, O. White, D.
2004. Characterization of Siberian Arctic estuarine
sediments: Implications for terrestrial organic
carbon export . Global Biogeochemical Cycles
18(1): GB1036.
Guo,
L., Zhang, J.-Z., Guéguen, C.,
2004. Speciation and fluxes of nutrients (N,
P, Si) from the upper Yukon River . Global Biogeochemical
Cycles 18(1): GB1038.
Guo,
L., Chen, M. and Guéguen, C.
2002. Control of Pa/Th ratio by particulate
chemical composition in the ocean . Geophys.
Res. Lett. 29 (20): art no. 1961.
Guo,
L. Huang, C.C. Santschi, P. H. and
Walsh, I. D. 2002. Th-234 scavenging and its
relationship to acid polysaccharide abundance
in the Gulf of Mexico. Marine Chemistry , 78(2/3):
103-119.
Guo,
L. Hunt, B. J., Santschi, P. H. and
Ray, S. 2001. Effect of dissolved organic matter
on the metal uptake by American oysters. Environ.
Sci. Technol. 35(5): 885-893.
Guo,
L., Wen, L., Tang, D., and Santschi,
P. H. 2000. Re-examination of cross flow ultrafiltration
for sampling aquatic colloids: evidence from
molecular probes. Marine Chemistry , 69: 75-90.
Guo,
L., Santschi, P. H., Cifuentes, L.
A., Trumbore, S., and Southon, J., 1996. Cycling
of high molecular weight dissolved organic matter
in the Middle Atlantic Bight as revealed by
carbon isotopic (13C and 14C) signatures. Limnol.
Oceanogr. 41: 1242-1252.
Guo,
L., Santschi, P. H. and Warnken, K.
W., 1995. Dynamics of dissolved organic carbon
in oceanic environments. Limnol. Oceanogr. 40:
1392-1403.
Guo,
L., Santschi, P. H., Baskaran, M.,
and Zindler, A., 1995. Distribution of dissolved
and particulate 230Th and 232Th in seawater
from the Gulf of Mexico and off Cape Hatteras
as measured by SIMS. Earth Planet. Sci. Lett.
133: 117-128.
