Biography:

In the past MATTHIAS TOMCZAK has collaborated on articles with Matthias Tomczak and Katarzyna Szymanska. One of their most recent publications is The ClNECA experience☆☆☆. Which was published in journal Marine Policy.

More information about MATTHIAS TOMCZAK research including statistics on their citations can be found on their Copernicus Academic profile page.

MATTHIAS TOMCZAK's Articles: (18)

Subduction of central water near the subtropical front in the southern Tasman Sea

AbstractStation data from the Subtropical Front ni the southern Tasman Sea obtained during the summer of 1988/89 were used to determine formation regions and formation history of Western South Pacific Central Water (WSPCW). At densities of gst = 26.6 and higher WSPCW found in the southern Tasman Sea is formed east of Tasmania near 150°E, from where it is advected eastward by the general oceanic circulation. No indication for equatorward movement after subduction was observed. At densities less than σt = 26.6 the water is characterized by multiple layers, intrusions and inversions. It is argued that they result from variability in Ekman transport direction and Ekman pumping. An atmospheric boundary layer model is used to estimate Ekman pumping velocities from the observed wind field. Ekman pumping velocities and hydrographic properties indicate that the less dense water moves equatorward and is subjected to winter mixing north of the investigation region, before it obtains its final temperature-salinity properties and becomes part of WSPCW through subduction.

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Summer and winter surveys of the Subtropical Front of the southeastern Indian Ocean 1997–1998

AbstractThe Subtropical Front (STF) in the region south of Australia was surveyed to determine its location, character, and seasonal variation. The survey consisted of two cruises, during summer and winter of 1998, and used a towed CTD system (SeaSoar).Based on observations, the STF does not appear to be continuous between the Indian and Pacific Oceans in the region south of Tasmania during winter; instead, it appears to end at the continental shelf of western Bass Strait near 40°S.During both seasons, the STF is characterized by moderate to strong density compensation with the horizontal density ratio (Rρ=αΔT/βΔS) close to 1 both in and below the mixed layer. This contrasts with observations in other regions where Rρ tends towards 2 below the mixed layer. We observed a high degree of interleaving, submerged eddies and small scale temperature and salinity variability. This is attributed to the interaction of a front that is density compensated with a local wind field that periodically reverses direction.

Simulated Lagrangian pathways between the Leeuwin Current System and the upper-ocean circulation of the southeast Indian Ocean

AbstractThe Leeuwin Current System, along the west Australian coast (22°S–34°S), forms a unique but poorly understood eastern boundary regime in which tropical waters flow poleward. Here we depict the three-dimensional paths connecting this eastern boundary system with the upper-ocean large-scale circulation around Australia based on selected trajectories from an online numerical particle tracking performed during the 1993/1997 integration of the 0.28° Los Alamos National Laboratory Parallel Ocean Program model. The simulated trajectories reveal a wealth of details about the regional circulation that are difficult to understand from observed and model Eulerian data alone. They reveal links between the Leeuwin Current, Leeuwin Undercurrent, Eastern Gyral Current, and zonal flows within the Subtropical Gyre. New findings include: a remote tropical source of the Leeuwin Current in the equatorial Indian Ocean, via the South Java Current; inshore (along the southern part of the North West Shelf) and offshore routes in the Indo-Australian Basin feeding the Leeuwin Current; strong exchange between the Leeuwin Undercurrent and adjacent Subtropical Gyre through a series of near surface eastward jets and deeper westward jets; and the tropical origin of the Eastern Gyral Current as a recirculation of the South Equatorial Current. We propose a current schematic summarising the links between the meridional boundary flows off Western Australia and the larger-scale circulation.

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