Synthesis & Modeling Project
Understanding the carbon flows between the euphotic
zone and 1000m depth
This work will develop a more detailed understanding of carbon flows
below the euphotic zone. The 100-1000m depth region is important to study
because large amounts of organic matter enter this region as particles
settling out of the euphotic zone, but only small amounts exit by falling
through the lower depth limit. In particular we will incorporate the role
of organisms so as to be able to describe the carbon flows between different
groups of animals and bacteria. Preliminary models suggest that the timing
and magnitude of seasonal productivity can dramatically affect the amount
of material that passes through on its way to the ocean floor. We plan
to use data from several study areas including the sites of the JGOFS field
programs starting with that of the North Atlantic Bloom Experiment.
This project should stimulate further studies of the sub-euphotic zone by highlighting the important processes determining the fate of oceanic primary production. The results should help the development of better global models of the carbon cycle.
|DATA:||Vertical Particle Flux Model with Predator-Prey Interactions|
Jackson, G. A., and A. B. Burd. 2002. A model for the distribution of particle flux in the mid-water column controlled by subsurface biotic interactions. Deep-Sea Research II 49: 193-217.
Burd, A. B., and G. A. Jackson. 2002. Modeling steady state particle size spectra. Environ. Sci. Technol. 36: 323-327.
Boyd, P. W., G. A. Jackson, and A. M. Waite. 2002. Are mesoscale perturbation experiments in polar waters prone to physical artefacts? Evidence from algal aggregation modelling studies. Geophys. Res. Let. 29: 10.1029/2001GL014210
Jackson, G. A. 2002. Collecting the garbage of the sea: the role of aggregation in ocean carbon transport. US JGOFS Newsletter 11 (4): 1-3, 10.
Burd, A. B., and G. A. Jackson. 2002. Illuminating the twilight zone: the effects of biological activity on midwater particle flux. US JGOFS Newletter 12 (1): 5-6.
Stemmann, L., G. A. Jackson, and D. Ianson. 2004. A vertical model of particle size distributions and fluxes in the midwater column that includes biological and physical processes. I. Model formulation. Deep-Sea Res. I, 51: 865--884
Stemmann, L., G. A. Jackson, and G. Gorsky. 2004. A vertical model of particle size distributions and fluxes in the midwater column that includes biological and physical processes. II. Application to a three year survey in the NW Mediterranean Sea. Deep-Sea Res. I 51: 885-908.
Burd, A. B., G. A. Jackson, R. S. Lampitt, and M. Follows. 2002. Shining a light on the ocean's twilight zone. EOS. 83 (49): 573
Jackson, G. A., and T. Kiørboe. 2004. Zooplankton use of chemodetection to find and eat particles. Mar. Ecol. Prog. Ser. 269: 153--162.
Ianson, D., G. A. Jackson, R. Lampitt, M. Angel, and A. B. Burd. The effect of net avoidance on estimates of diel vertical migration. Limnol. Oceanogr. Accepted, June 2004.
Visser, A. W., and G. A. Jackson. Characteristics of the chemical plume behind a sinking particle in a turbulent water column. Mar. Ecol. Prog. Ser. Accepted, July 2004.
Jackson "Development of upper-ocean
aggregation models useful for interpreting and predicting carbon fluxes"
George A. Jackson
Department of Oceanography
Texas A&M University
College Station, TX 77843
tel: (979) 845-0405
fax: (979) 845-8219