Dhanushka Devendra

Institute of Oceanology Polish Academy of Sciences · Laboratory of Paleoceanography

The flow of the Atlantic Water (AW) via the Return Atlantic Current (RAC) regulates the oceanographical conditions in the Northwestern (NW) Greenland Sea in the Fram Strait. As the intensity of the RAC might significantly influence both deep-water formation in the area and the stability of the Northeast Greenland Ice Sheet (NE GIS), knowledge of it...

While general trends in the inflow of Atlantic Water (AW) to the European Arctic over the present interglacial (the Holocene) are well known, regional changes in climate and the AW current and subsequent environmental responses are less well established. In particular, there is only limited knowledge on the development of ocean currents after the l...

New planktonic and benthic foraminiferal stable isotope records from core YDY05 (northeastern Indian Ocean) provide new insights into paleoceanographic changes in the northeastern Indian Ocean since the last glacial period. The distinct δ¹⁸O decrease was observed since the beginning of the deglaciation to the mid-Holocene (∼8–6 kyr BP), possibly re...

Sedimentary ancient DNA (sedaDNA) offers a novel retrospective approach to reconstructing the history of marine ecosystems over geological timescales. Until now, the biological proxies used to reconstruct paleoceanographic and paleoecological conditions were limited to organisms whose remains are preserved in the fossil record. The development of a...

Previous sedimentary and model-based investigations of the Storegga tsunami were primarily limited to the regions proximal to its origin. However, the catastrophic event may have had impacts extending to distances much greater than previously recognized, which remain elusive. Here, we investigated the Storegga slide-induced tsunami currents propaga...

The last deglaciation was marked by abrupt shifts between cold and warm states reflecting an integrated response to the gradually increasing summer insolation at northern latitudes, changing ocean circulation, and the retreat of the Northern Hemisphere ice sheets. In this study, we present new multiproxy reconstructions of water mass properties and...

The flow of the Atlantic Water (AW) via the Return Atlantic Current (RAC) regulates the oceanographical conditions in the Northwestern (NW) Greenland Sea in the Fram Strait. As the intensity of the RAC might have a significant influence on both deep-water formation in the area and on the stability of the Greenland Ice Sheet (GIS), knowledge of its...

Phytolith containing tissue particles (PCTP) were extracted from the deep oceanic sediment of the Indian Ocean sediment core YDY09 (water depth of 3520m at 85.960985 N, 9.99351 E). According to the microscopic observations, these tissue particles are composed of 2 to 10 phytolith cells and possibly a matrix of organic matter. Absolute abundance of...

We reconstruct paleoproductivity changes during the past 37 kyr BP, from the southern South China Sea. We used productivity proxies such as planktonic and benthic foraminiferal stable isotope, total organic carbon, the relative abundance of Globigerina bulloides, and absolute abundance of planktonic foraminifera. The comparison between productivity...

Geochemical proxies in organic matter (OM) are considered to be reliable proxies for deciphering types of paleo-vegetation (C3 plants and C4 plants) and their abundance. The contributions of total organic carbon (TOC), stable carbon isotopes (δ¹³Corg), total nitrogen (TN) and organic carbon to total nitrogen ratios (C/N) were obtained from a gravit...