Preprints
https://doi.org/10.5194/bg-2020-283
https://doi.org/10.5194/bg-2020-283
11 Sep 2020
 | 11 Sep 2020
Status: this preprint has been withdrawn by the authors.

Extraterrestrial dust as a source of bioavailable Fe for the ocean productivity

Rudraswami N. Gowda, Mayank Pandey, Matthew J. Genge, and Dafilgo Fernandes

Abstract. Bioavailable Fe is an essential nutrient for phytoplankton that allows organisms to flourish and drawdown atmospheric CO2 affecting global climatic condition. In marine locales remote from the continents extraterrestrial-dust provides an important source of Fe and thus moderates primary productivity. Here we provide constraints on partitioning of extraterrestrial Fe between seawater and sediments from observations of dissolution and alteration cosmic spherules recovered from the deepsea sediments and Antarctica. Of the ~ 3000–6000 t/a extraterrestrial dust that reaches Earth surface, ~ 2–5 % material survives in marine sediments whilst the remainder is liberated into seawater. Both processes contributes ~ (3–10) × 10−8 molFe m−2 yr−1. Also, Fe contribution due to evaporation of survived particle is estimated to be ~ 10 % of Fe contribution to meteoric smoke. Changes in extraterrestrial-dust flux vary not only the amount of Fe by up to three orders of magnitude, but also the partitioning of Fe between surface and abyssal waters depending on entry velocity and evaporation.

This preprint has been withdrawn.

Publisher's note: Copernicus Publications remains neutral with regard to jurisdictional claims made in the text, published maps, institutional affiliations, or any other geographical representation in this preprint. The responsibility to include appropriate place names lies with the authors.
Rudraswami N. Gowda, Mayank Pandey, Matthew J. Genge, and Dafilgo Fernandes

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Rudraswami N. Gowda, Mayank Pandey, Matthew J. Genge, and Dafilgo Fernandes

Data sets

Extraterrestrial dust as a source of bioavailable Fe for the ocean productivity N. G. Rudraswami https://doi.org/10.5061/dryad.zcrjdfn7t

Rudraswami N. Gowda, Mayank Pandey, Matthew J. Genge, and Dafilgo Fernandes

Viewed

Total article views: 1,082 (including HTML, PDF, and XML)
HTML PDF XML Total Supplement BibTeX EndNote
813 229 40 1,082 126 38 42
  • HTML: 813
  • PDF: 229
  • XML: 40
  • Total: 1,082
  • Supplement: 126
  • BibTeX: 38
  • EndNote: 42
Views and downloads (calculated since 11 Sep 2020)
Cumulative views and downloads (calculated since 11 Sep 2020)

Viewed (geographical distribution)

Total article views: 889 (including HTML, PDF, and XML) Thereof 888 with geography defined and 1 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Latest update: 23 May 2024
Download

This preprint has been withdrawn.

Short summary
Bioavailable Fe is necessary component for phytoplankton to survive and will play a crucial role in reducing the carbon dioxide in the atmosphere. The Fe increase the primary productivity of ocean which is rare in the isolated region of the ocean. Here, the role of extraterrestrial dust become significant as smoke from the ablation and etching also contribute Fe to this organism which in turn reduces the adverse effect on the climate by acting as sink of carbon dioxide.
Altmetrics