Environmental Engineering Reference
In-Depth Information
2. The main sink for oxygen is respiration of sinking particulate organic
carbon (POC). Dissolved organic carbon (DOC) may also be important but
much less is known about its distributions. Variability in the flux of POC
(export production) is probably influenced by nutrient concentrations and food
web structure (which are not unrelated). The late 1970s were a period of
increased nutrient levels in the Black Sea (eutrophication) and this appeared to
result in a thicker suboxic zone resulting from enhanced respiration.
In the near future it will be important to initiate and maintain time series
of biogeochemical distributions in the Black Sea at several locations. Much is
learned about the oceanography of a system when you can watch its response to
a perturbation. Two important perturbations we want to continue to watch are
climatic forcing (both natural and anthropogenic) and eutrophication. Process
studies should be conducted of 1) the ventilation of the CIL and suboxic zone
and 2) the flux and respiration of particulate organic matter and its relation to
food web structure.
Acknowledgements
Tolga Uysal and Emre Pamukcu (both at Bogazici University), Amy Calla-
han, Clara Fuchsman, John Kirkpatrick (all in the School of Oceanography at
University of Washington), Valery Chasovnikov, Oleg Podymov and Svetlana
Pachomova (Shirshov Institute of Oceanology, Gelendjik and Moscow) helped
with the nutrient analyses, collection and interpretation of hydrographic data
and interpretation microbial distributions. Doug DiJulio and Keith Stewart,
Steven Kassakian and Marta Krynytzky (UW undergraduates) helped with data
analysis. George Luther (Delaware) and Brad Tebo (SIO) helped organize and
conduct the research cruises and have allowed their data to be shown. The lab
groups of Steve Emerson and Paul Quay (both at UW) assisted with the N
2
and isotope analyses. We acknowledge NSF Grants OCE 0081118 and MCB
0132101; NATO Collaborative Linkage Grant # EST-CLG-979141 and CRDF
Awards RG1-2388-GE-02. F. Muller-Karger, L. Neretin and an anonymous
reviewer provided constructive reviews.
References
[1]
Andrusov N.I. Predvaritelnii otchyot ob uchastii v Chernomorskoi glubomernoi ekspid-
itsii 1890 g. (Preliminary report on participation in the 1890 Black Sea fathometer ex-
pedition)
Izvestiya Russkogo Geograficheskogo Obschestva (Proceedings of the Russian
Geographical Society
1890; 26(5):398-409.
[2]
Basturk O., Saydam C., Salihoglu I. , Eremeeva L.V., Konovalov SK., Stoyanov A.,
Dimitrov A., Cociasu A., Dorogan L. and Altabet M. Vertical variations in the principle
chemical properties of the Black Sea in the autumn of 1991. Journal of Mar Chem 1994;
45:149-65.
