Special issue |
Understanding the Indian Ocean system: past, present and future (BG/ACP/OS/SE inter-journal SI)(BG/ACP/OS/SE inter-journal SI)
Editor(s): Hermann Bange, Raleigh Hood, Viviane Menezes, Colin W. Devey, and Federico Rossetti
Special issue jointly organized between Biogeosciences, Atmospheric Chemistry and Physics, Ocean Science, and Solid Earth
The last 50 years have enabled significant progress in our ability to describe and model both the oceanic and atmospheric environments of the Indian Ocean and their interactions with the sea floor and coastal regimes. However, our understanding of the major processes of the Indian Ocean is still far from complete and is rudimentary in many respects. This SI compiles various synthesis articles about the recent results of the 2nd International Indian Ocean Expedition Program (IIOE-2: https://iioe-2.incois.gov.in/). The synthesis articles will review and highlight results of physical, biogeochemical, ecological, geological, coastal and atmospheric studies from all parts of the Indian Ocean. Moreover, the SI will serve to illustrate some of the key questions that are relevant for future research on the grand challenges in the Indian Ocean system.
Preprint under review for BG(discussion: open, 0 comments)
The Indian Ocean-rim hosts many of the underdeveloped and emerging economies that depend on the ocean resources for the livelihood of the millions. Operational ocean information services cater to the requirements of managers and end-users to efficiently harness resources, and ensure safety. This paper reviews existing tools, and explores the ongoing research that has potential to convert the findings into operational services in near-to-mid term.
Preprint under review for ACP(discussion: open, 1 comment)
In the atmosphere over the Indian Ocean, intense anthropogenic pollution from Southeast Asia mixes with pristine oceanic air. During the winter monsoon, high pollution levels are regularly observed over the entire northern Indian Ocean, while during the summer monsoon, clean air dominates. Here, we review current progress in detecting and understanding atmospheric gas-phase composition over the Indian Ocean and its impacts on the upper atmosphere, oceanic biogeochemistry and marine ecosystems.
The northern Indian Ocean hosts an extensive oxygen minimum zone (OMZ), which intensified due to human-induced global changes. This includes the occurrence of anoxic events on the Indian shelf and affects benthic ecosystems and the pelagic ecosystem structure in the Arabian Sea. Consequences for biogeochemical cycles are unknown, which, in addition to the poor representation of mesoscale features, reduces the reliability of predictions of the future OMZ development in the northern Indian Ocean.