Hydrologic and hydrochemical data for the Ob-Irtysh and Yenisey River systems of central Russia, 1954-1988

Bobrovitskaya, Nelly N.; Skakalsky, B.G.; Zubkova, K.M.; Dobrotvorskaya, G.I.; Петрова, И. В.; Tsivjyan, M.V.; Chistyakova, N.I.; Yanuta, V.G.

doi:10.3133/ofr97232

Cited by 14 publications

(16 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For calculation, water and sediment discharge data from Lammers and Shiklomanov (2000) and Bobrovitskaya et al (1997), as well as suspension data from 2001 sampled from August 15th to 22nd, 2001 (Yenisei River) and from September 7th to 11th, 2001 (Ob River) were used. The data from Lammers and Shiklomanov (2000) and Bobrovitskaya et al (1997) consist of monthly means of water and sediment discharge measured at the gauging stations in Salekhard (Ob River) and in Igarka (Yenisei River). As the Ob River meets three tributaries downstream of Salekhard (Pur, Taz and Nadym rivers), the water discharge data of these three small rivers were added to the Ob River discharge.…”

Section: Tsm Poc and Pn Budget For The Ob And Yenisei Riversmentioning

confidence: 99%

See 1 more Smart Citation

Recent particulate organic carbon and total suspended matter fluxes from the Ob and Yenisei Rivers into the Kara Sea (Siberia)

et al. 2004

View full text Add to dashboard Cite

The Ob and Yenisei Rivers account for more than one-third of the total fresh water supply to the Arctic Ocean. In the past, their sediment load and particulate organic carbon (POC) discharge into the Kara Sea has been measured at stations in the hinterland far south of the estuaries. Suspended matter has been sampled in the estuaries and southern Kara Sea within the framework of the joint Russian -German ''SIRRO'' program (Siberian River Run-Off), allowing a reliable new estimate of fluxes from the rivers into the Kara Sea. Our estimates of annual supplies of sediment (3.76 Â 10 6 t), particulate organic carbon (0.27 Â 10 6 t) and particulate nitrogen (PN) (0.027 Â 10 6 t) from the Ob River to the Kara Sea are lower than earlier estimates from the northernmost gauging station in the hinterland due to deposition of particulate matter in the Ob Bay. On the other hand, our estimates of the Yenisei's annual sediment (5.03 Â 10 6 t), particulate organic carbon (0.57 Â 10 6 t) and particulate nitrogen (0.084 Â 10 6 t) supplies to the Kara Sea are probably too high, as they suggest a pure bypass system in the investigated area. We differentiate between an area of recent deposition in the south of the Kara Sea and an area of recent organic matter degradation further north. D

show abstract

Section: Tsm Poc and Pn Budget For The Ob And Yenisei Riversmentioning

confidence: 99%

“…b Long term mean monthly sediment discharge of the Yenisei River at the gauging station in Igarka (Bobrovitskaya et al, 1997).…”

Section: Calculation Of the Budgetsmentioning

confidence: 99%

Recent particulate organic carbon and total suspended matter fluxes from the Ob and Yenisei Rivers into the Kara Sea (Siberia)

et al. 2004

View full text Add to dashboard Cite

show abstract

“…Long-term records of freshwater and suspended matter discharges are available from several hydrographic stations along both rivers (Bobrovitskaya et al, 1997;Meade et al, 2000;Holmes et al, 2001). TSM supply to the Kara Sea after dam constructions in the upper reaches of the rivers was estimated as 4.2 Â 10 6 t a À1 at Igarka for the Yenisei (Dmitrenko et al, 1999).…”

Section: Study Areamentioning

confidence: 99%

Particulate matter fluxes in the southern and central Kara Sea compared to sediments: Bulk fluxes, amino acids, stable carbon and nitrogen isotopes, sterols and fatty acids

Gaye

Fahl

Kodina

et al. 2007

Continental Shelf Research

View full text Add to dashboard Cite

The Kara Sea is one of the arctic marginal seas strongly influenced by fresh water and river suspension. The highly seasonal discharge by the two major rivers Yenisei and Ob induces seasonal changes in hydrography, sea surface temperature, ice cover, primary production and sedimentation. In order to obtain a seasonal pattern of sedimentation in the Kara Sea, sediment traps were deployed near the river mouth of the Yenisei (Yen) as well as in the central Kara Sea (Kara) within the framework of the German-Russian project ''Siberian River run-off; SIRRO''. Two and a half years of time-series flux data were obtained between September 2000 and April 2003 and were analyzed for bulk components, amino acids, stable carbon and nitrogen isotopes as well as sterols and fatty acids.Sediment trap data show that much of the annual deposition occurred under ice cover, possibly enhanced by zooplanktonic activity and sediment resuspension. An early bloom of ice-associated algae in April/May occurred in the polynya area and may have been very important to sustain the life cycles of higher organisms after the light limitation of the winter months due to no/low insolation and ice cover. The strong river input dominated the months June-August in the southern part of the Kara Sea. The central Kara Sea had a much shorter productive period starting in August and was less affected by the river plumes. Despite different time-scales of sampling and trapping biases, total annual fluxes from traps were in the same order of magnitude as accumulation rates in surface sediments. Terrestrial organic carbon accumulation decreased from 10.7 to 0.3 g C m À2 a À1 from the riverine source to the central Kara Sea. Parallel to this, preservation of marine organic matter decreased from 10% to 2% of primary productivity which was probably related to decreasing rates of sedimentation. r

show abstract

“…Sediment and particulate organic carbon input from the Ob and Yenisei rivers During recent decades, many studies were carried out on sediment and organic carbon fluxes from the Ob and Yenisei rivers into the Kara Sea (e.g. Bobrovitskaya et al, 1996Bobrovitskaya et al, , 1997Gordeev et al, 1996;Lisitsyn, 1972;Lisitsyna, 1974;Nesterova, 1960;Romankevich et al, 2000b;Telang et al, 1991). All these studies use data from the northernmost gauging stations in the hinterland (Igarka for the Yenisei River and Salekhard for the Ob River; Fig.…”

Section: Overview Of the Kara Sea Shelfmentioning

confidence: 99%

“…There are indications that recent anthropogenic activity has already had an impact on water discharge and, thus, on the carbon budget of the Arctic. Dam building in the 1950s and 1960s has, probably, reduced water discharge and changed its seasonality (Bobrovitskaya et al, 1997(Bobrovitskaya et al, , 2003. The overall trend summarizing all available Arctic discharge data may, however, be an increase due to melting of permafrost soils (Peterson et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

A contemporary sediment and organic carbon budget for the Kara Sea shelf (Siberia)

et al. 2005

View full text Add to dashboard Cite

It has recently been realized that the Arctic undergoes drastic changes, probably resulting from global change induced processes. This acts on the cycling of matter and on biogenic elements in the Arctic Ocean having feedback mechanisms with the global climate, for example by interacting with atmospheric trace gas concentration. A contemporary budget for biogenic elements as well as suspended matter for the Arctic Ocean as a baseline for comparison with effects of further global change is, thus, needed. Available budgets are based on the late Holocene sedimentary record and are therefore quiet different from the present which has already been affected by the intense anthropogenic activity of the last centuries.We calculated a contemporary suspended matter and organic carbon budget for the Kara Sea utilizing the numerous available data from the recent literature as well as our own data from Russian-German SIRRO (Siberian River Run-off) expeditions. For calculation of the budgets we used a multi-box model to simplify the Kara Sea shelf and estuary system: input was assumed to comprise riverine and eolian input as well as coastal erosion, output was assumed to consist of sedimentation and export to the Arctic Ocean. Exchange with the adjacent seas was considered in our budget, and primary production as well as recycling of organic material was taken into account. According to our calculations, about 18.5 Â 10 6 t yr À 1 of sediments and 0.37 Â 10 6 t yr À 1 of organic carbon are buried in the estuaries, whereas 20.9 Â 10 6 t yr À 1 sediment and 0.31 Â10 6 t yr À 1 organic carbon are buried on the shelf. Most sources and sinks of our organic carbon budget of the Kara Sea are in the same order of magnitude, making it a region very sensitive to further changes. D

show abstract

Hydrologic and hydrochemical data for the Ob-Irtysh and Yenisey River systems of central Russia, 1954-1988

Cited by 14 publications

References 0 publications

Recent particulate organic carbon and total suspended matter fluxes from the Ob and Yenisei Rivers into the Kara Sea (Siberia)

Recent particulate organic carbon and total suspended matter fluxes from the Ob and Yenisei Rivers into the Kara Sea (Siberia)

Particulate matter fluxes in the southern and central Kara Sea compared to sediments: Bulk fluxes, amino acids, stable carbon and nitrogen isotopes, sterols and fatty acids

A contemporary sediment and organic carbon budget for the Kara Sea shelf (Siberia)

Contact Info

Product

Resources

About