Reconstructed ozone concentration in Antarctica based on the relative abundance of freshwater diatoms providing from a sediment core of Profound Lake/King George Island/Antarctica


Profound Lake (formerly known as Lago Glubokoe or Glubokoye) (62°11,066'S;058°54,413'W), is situated on Fildes Peninsula, the largest ice-free area (29 km2) of King George Island, the largest of the South Shetland Islands, located in the extreme southwestern part of the island. This lake lies 500 m from the base of the Collins glacier, close to the Uruguayan research base (Artigas) and Maxwell Bay. Morphologically it has a surface area of 90 km² and 14.7 m maximum depth. It's a holocenic, non-impacted, pro-glacial lake where diatoms are abundant and diverse.This organisms present a cell envelope, external to the plasma membrane, composed of rigid structure impregnated with silica called frustules, resistant to dissolution, that allow their preservation in sediment layers in the long term. These characteristics enable the use of diatoms in paleoenvironmental, paleoclimatic and paleoecological studies, thus we use the relative abundance of this organisms in a sediment corer in order to calibrate and evaluate the use of them as a proxy to reconstructed Ozone variability iin Antarctica.

Metadata Access
Creator Oaquim, Anna Beatriz Jones; Evangelista, Heitor ORCID logo; Moser, Gleyci Aparecida Oliveira; Lima, Domênica Teixeira; Licínio, Marcus Vinicius; Correia, Emilia
Publisher PANGAEA
Publication Year 2021
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 506 data points
Discipline Earth System Research
Spatial Coverage (-58.907 LON, -62.184 LAT); King George Island, Antarctica