| Keywords | Marin kemi, biologi och geologi; kemiska utbyten mellan sediment och vatten;
porvatten profiler; djuphavs och kustnära; abyssal; botten landare;
bentiska kammare; gel peeprar; Skagerrak; Weddell havet; Sibiriska shelfen;
Arktis; Medelhavet; Gulf of St Lawrence, Marine benthic biogeochemistry, chemical fluxes, pore water distributions,
in situ measurements, coastal areas, deep-sea, Skagerrak, Baltic Sea,
Weddell Sea, Siberian Shelf, Mediterranean Sea, Gulf of St Lawrence, NE
Atlantic, NE Pacific, benthic landers, autonomous instruments, long term
deployments, one and two dimensional optical sensors, benthic chambers |
| Benthic (bottom) biogeochemistry in coastal, shelf and deep-sea environments; importance to the local and global environment. Our research group has during several years tried to characterise and understand marine benthic biogeochemical processes and their importance both on the local and global environment. This work, mainly based of measurements of chemical fluxes and pore water profiles, have been carried out both through studies in the laboratory and in the field. The field work was previously mainly been concentrated to coastal areas, but has recently been extended to the deep-sea. Different areas have been sampled, investigated and compared such as fjords in western Sweden, the Skagerrak (north-eastern North Sea), the Weddell Sea (Antarctica), the Siberian Shelf and the big Russian river outlets, the Arctic region around Svalbard, the Mediterranean Sea and the Gulf of St Lawrence (Canada).A so called "benthic lander" was constructed during 1993-94 in cooperation with a French research institute (Laboratoire Arago, Banyuls-sur-Mer). This instrument is completely autonomous and can work to a maximum water depth of 6000 m. It is built as a modular system where one or several of the experimental modules can be exchanged for other types. In its present version the lander is equipped with four so called "benthic chamber" modules. Each of these is capable of closing off a small piece of the sea floor together with the overlying water. In this water measurements and water sampling are performed to estimate chemical exchanges (fluxes) between the sea floor and the overlying water. |