Fertilization potential of volcanic dust in the low-nutrient low-chlorophyll western North Pacific subtropical gyre: Satellite evidence and laboratory study
2011; Wiley; Volume: 25; Issue: 1 Linguagem: Inglês
10.1029/2009gb003758
ISSN1944-9224
AutoresI.‐I. Lin, Chuanmin Hu, Yuan-Hui Li, Tung‐Yuan Ho, Tobias P. Fischer, George T.F. Wong, Jingfeng Wu, Chih-Wei L. Huang, D. A. Chu, Dong S. Ko, Jen‐Ping Chen,
Tópico(s)Atmospheric and Environmental Gas Dynamics
Resumovolcanic particles and a phytoplankton bloom. FLH was found to be ∼9–17 × 10 −3 mW cm −2 mm −1 sr −1 in the patch and ∼3– 5×1 0 −3 mW cm −2 mm −1 sr −1 in the ambient water, indicating that a 2–5‐fold increase in biological activity occurred during the week following the eruption. Satellite altimetry indicated that the bloom took place in the presence of downwelling and was not a result of upwelled nutrients in this oligotrophic ocean. Analysis of satellite ocean color spectra of the bloom region found similar spectra as the reference Trichodesmium spectra. Laboratory experiments further substantiate the satellite observations which show elevated concentrations of limiting nutrients provided by the Anatahan samples, and the averaged soluble nitrate, phosphate, and Fe were 42, 3.1, and 2.0 nM, respectively. Though it was not possible to obtain in situ observations of the ocean biogeochemical responses that followed the Anatahan eruption, this study provided evidence based on remote sensing data and laboratory experiment that fertilization of volcanic aerosols occurred following this eruption in one of the most oligotrophic low‐nutrient low‐chlorophyll ocean deserts on Earth.
Referência(s)