On the wind-forcing of bottom pressure variability at Amsterdam and Kerguelen Islands, southern Indian Ocean

2004 ◽  
Vol 109 (C3) ◽  
Author(s):  
Michael P. Meredith ◽  
Chris W. Hughes
Keyword(s):  
Indian Ocean ◽  
Wind Forcing ◽  
Southern Indian Ocean ◽  
Bottom Pressure ◽  
Kerguelen Islands

scholarly journals Cadmium, copper and zinc in octopuses from Kerguelen Islands, Southern Indian Ocean

Polar Biology ◽  
1998 ◽  
Vol 19 (4) ◽  
pp. 264-271 ◽  
Author(s):  
P. Bustamante ◽  
Y. Cherel ◽  
F. Caurant ◽  
P. Miramand
Keyword(s):  
Indian Ocean ◽  
Southern Indian Ocean ◽  
Kerguelen Islands ◽  
Copper And Zinc

Population dynamics of Themisto gaudichaudii in Kerguelen Islands waters, Southern Indian Ocean

Polar Biology ◽  
2005 ◽  
Vol 28 (10) ◽  
pp. 776-783 ◽  
Author(s):  
Jean-Philippe Labat ◽  
Patrick Mayzaud ◽  
Stéphanie Sabini
Keyword(s):  
Population Dynamics ◽  
Indian Ocean ◽  
Southern Indian Ocean ◽  
Kerguelen Islands

scholarly journals Solubility of iron and other trace elements in rainwater collected on the Kerguelen Islands (South Indian Ocean)

2013 ◽  
Vol 10 (10) ◽  
pp. 6617-6628 ◽  
Author(s):  
A. Heimburger ◽  
R. Losno ◽  
S. Triquet
Keyword(s):  
Indian Ocean ◽  
Southern Indian Ocean ◽  
Deposition Flux ◽  
Marine Biota ◽  
Kerguelen Islands ◽  
South Indian ◽  
Dust Sources ◽  
Drastic Increase ◽  
Global Biogeochemical Cycles ◽  
Elements In Rainwater

Abstract. The soluble fraction of aerosols that is deposited on the open ocean is vital for phytoplankton growth. It is believed that a large proportion of this dissolved fraction is bioavailable for marine biota and thus plays an important role in primary production, especially in HNLC oceanic areas where this production is limited by micronutrient supply. There is still much uncertainty surrounding the solubility of atmospheric particles in global biogeochemical cycles and it is not well understood. In this study, we present the solubilities of seven elements (Al, Ce, Fe, La, Mn, Nd, Ti) in rainwater on the Kerguelen Islands, in the middle of the Southern Indian Ocean. The solubilities of elements exhibit high values, generally greater than 70%, and Ti remains the least soluble element. Because the Southern Indian Ocean is remote from its dust sources, only a fraction of smaller aerosols reaches the Kerguelen Islands after undergoing several cloud and chemical processes during their transport, resulting in a drastic increase in solubility. Finally, we deduced an average soluble iron deposition flux of 27 ± 6 μg m−2 d−1 (~0.5 μmol m−2 d−1) for the studied oceanic area, taking into account a median iron solubility of 82% ± 18%.

scholarly journals Solubility of iron and other trace elements over the Southern Indian Ocean

2013 ◽  
Vol 10 (3) ◽  
pp. 6065-6092 ◽  
Author(s):  
A. Heimburger ◽  
R. Losno ◽  
S. Triquet
Keyword(s):  
Indian Ocean ◽  
Chemical Processes ◽  
Southern Indian Ocean ◽  
Deposition Flux ◽  
Marine Biota ◽  
Iron Solubility ◽  
Kerguelen Islands ◽  
Dust Sources ◽  
Drastic Increase ◽  
Global Biogeochemical Cycles

Abstract. The fraction of soluble aerosols that is deposited on the open ocean is vital for phytoplankton growth. It is believed that a large proportion of this dissolved fraction is bioavailable for marine biota and thus plays an important role in primary production, especially in HNLC oceanic areas where this production is limited by micronutrient supply. There is still much uncertainty surrounding the solubility of atmospheric particles in global biogeochemical cycles and it is not well understood. In this study, we present the solubilities of seven elements (Al, Ce, Fe, La, Mn, Nd, Ti) in rainwater on Kerguelen Islands, in the middle of the Southern Indian Ocean. The solubilities exhibit high values, generally greater than 70%, and Ti remains the least soluble element. Because the Southern Indian Ocean is remote from its dust sources, only the fraction of smaller aerosols reaches Kerguelen Islands after undergoing several cloud and chemical processes during their transport resulting in a drastic increase in solubility. Finally, we deduced an average soluble iron deposition flux of 23 μg m−2 d−1 (0.4 μmol m−2 d−1) for the studied oceanic area, taking into account a~median iron solubility of 82% ± 18%.

Continuous flow analysis of the Mount Brown South ice core

2021 ◽  
Author(s):  
Margaret Harlan ◽  
Helle Astrid Kjær ◽  
Tessa Vance ◽  
Paul Vallelonga ◽  
Vasileios Gkinis ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Size Distribution ◽  
Continuous Flow ◽  
Ice Core ◽  
Flow Analysis ◽  
East Antarctica ◽  
Southern Indian Ocean ◽  
Indian Ocean Region ◽  
Continuous Flow Analysis ◽  
Ocean Region

<p>The Mount Brown South (MBS) ice core is an approximately 300-meter-long ice core, drilled in 2016-2017 to the south of Mount Brown, Wilhelm II Land, East Antarctica. This location in East Antarctica was chosen as it produces an ice core with well-preserved sub-annual records of both chemistry and isotope concentrations, spanning back over 1000 years. MBS is particularly well suited to represent climate variations of the Indian Ocean sector of Antarctica, and to provide information about regional volcanism in the Southern Indian Ocean region.</p><p>A section of ice spanning the length of the MBS core was melted as part of the autumn 2019 continuous flow analysis (CFA) campaign at the Physics of Ice, Climate, and Earth (PICE) group at the University of Copenhagen. During this campaign, measurements were conducted for chemistry and impurities contained in the ice, in addition to water isotopes. The data measured in Copenhagen include measurements of H<sub>2</sub>O<sub>2,</sub> pH, electrolytic conductivity, and NH<sub>4</sub><sup>+</sup>, Ca<sup>2+</sup>, and Na<sup>+</sup> ions, in addition to insoluble particulate concentrations and size distribution measured using an Abakus laser particle counter.</p><p>Here, we present an overview of the CFA chemistry and impurity data, as well as preliminary investigations into the size distribution of insoluble particles and the presence of volcanic material within the ice. These initial chemistry and particulate size distribution data sets are useful in order to identify sections of the MBS core to subject to further analysis to increase our understanding of volcanic activity in the Southern Indian Ocean region.</p>

Formation and Evolution of Microcontinents of the Kerguelen Plateau, Southern Indian Ocean

Geotectonics ◽  
2018 ◽  
Vol 52 (5) ◽  
pp. 499-515 ◽  
Author(s):  
G. L. Leitchenkov ◽  
E. P. Dubinin ◽  
A. L. Grokholsky ◽  
G. D. Agranov
Keyword(s):  
Indian Ocean ◽  
Southern Indian Ocean ◽  
Kerguelen Plateau ◽  
Formation And Evolution
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