HR: 1340h
AN: A33E-1649    [Abstracts]
TI: Atmospheric Dust Impacts on Marine Phytoplankton
AU: * Paytan, A
EM: apaytan@ucsc.edu
AF: UC Santa Cruz, 1156 High Street, Santa Cruz, CA 95060, United States
AU: Mackey, K R
EM: kmackey@stanford.edu
AF: Stanford University, Civil and Environmental Engineering, Stanford, CA 94305, United States
AU: Chen, Y
EM: yingcheny@yahoo.com
AF: Stanford University, Geological and Environmental Sciences, Stanford, CA 94305, United States
AU: Mahowald, N
EM: mahowald@poorman.cgd.ucar.edu
AF: National Center for Atmospheric Research, PO Box 3000, Boulder, CO 80307, United States
AU: Doney, S
EM: sdoney@whoi.edu
AF: Woods Hole Oceanographic Institution, 360 Woods Hole Road, Woods Hole, MA 02543, United States
AU: Post, A
EM: anton@pob.huji.ac.il
AF: Hebrew University, Givat Ram Campus, Jerusalem, 94106, Israel
AB: Atmospheric dust deposition is an important source of nutrients and trace metals to the ocean. It likely enhances ocean productivity and carbon sequestration, thus influencing atmospheric carbon dioxide concentrations and climate. We used well-characterized aerosol samples in incubation experiments to examine the effect of aerosol on phytoplankton growth and species distribution. Not all dust stimulates growth. The response of phytoplankton to aerosol additions depends on specific aerosol chemistry. Moreover, different species within the phytoplankton community respond differently to dust additions. The variability in the response to dust deposition may account for change in predicted distribution of oceanic primary production. To more accurately predict the impacts of expected future changes in dust deposition on climate global climate models must include these variable and complex interactions between aerosols and marine phytoplankton.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0426 Biosphere/atmosphere interactions (0315)
DE: 1610 Atmosphere (0315, 0325)
DE: 4906 Aerosols (0305, 4801)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting