Gebhardt et al.(2004)による

Gebhardt et al.(2004)による〔『Recent particulate organic carbon and total suspended matter fluxes from the Ob and Yenisei Rivers into the Kara Sea (Siberia)』（225p）から〕

『オビ川とエニセイ川からカラ海（シベリア）への最近の粒子状有機炭素と全浮遊物質フラックス』

『Abstract
　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 (3.76×10⁶ t), particulate organic carbon (0.27×10⁶ t) and particulate nitrogen (PN)(0.027×10⁶ 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 By. On the other hand, our estimates of the Yenisei's annual sediment (5.03×10⁶ t), particulate organic carbon (0.57×10⁶ t) and particulate nitrogen (0.084×10⁶ t) supplies to the Kara Sea and 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.

Keywords: Kara Sea; Ob River; Yenisei River; carbon budget; carbon cycle; Arctic Ocean; POC; TSM』

1. Introduction
2. Materials and methods
　2.1. Sampling
　2.2. Analytical procedures
3. Results
　3.1. Salinity
　3.2. Total suspended matter
　3.3. Particulate organic carbon and particulate nitrogen
4. Discussion
　4.1. Interannual and intraseasonal variability
　4.2. TSM and POC in the Ob and the Yenisei Rivers
　4.3. Transport, degradation and sedimentation of TSM and POC
　4.4. TSM, POC and PN budget for the Ob and Yenisei Rivers
　　4.4.1. Calculation of the budgets
　　4.4.2. TSM, POC and PN budgets for the Yenisei River in 2001
　　4.4.3. TSM, POC and PN budgets for the Yenisei River were calculated (Table 3 ) as described above
　　4.4.4. TSM and POC budgets for the Ob River in 2001

表５　エニセイ川とオビ川からカラ海への年間のTSM（全浮遊物質）、POC（粒子状有機炭素）、およびPN（粒子状窒素）排出量
河川 TSM排出量
（10⁶ t/年） POC排出量
（10⁶ t/年） PN排出量
（10⁶ t/年）出典

エニセイ 5.03 0.57 0.084 本論文

9.2^a 　　 Dittmers et al.(2003)

　 0.31 　 Kohler（oの頭に¨） et al.(2003)

　 0.17^b 　 Lobbes et al.(2000)

4.2^b 　　 Bobrovitskaya et al.(1996)

5.9^b 　　 Gordeev et al.(1996)

14.5^c 　　 Telang et al.(1991)

13^c 　　 Lisitsyn(1972)

オビ 3.76 0.27 0.027 本論文

12.11^d 0.61^d 0.081^d 本論文

14.3^a 　　 Dittmers et al.(2003)

　 0.27 　 Nesterova(1960)

16.2^b 　　 Bobrovitskaya et al.(1996)

18.4 　　 Gordeev et al.(1996)

13.4 　　 Telang et al.(1991)

15.0^b 　　 Lisitsyna et al.(1974)

16 　　 Lisitsyn(1972)

^a完新世の平均値
^bダム建設後の期間の値
^cダム建設前の期間の値
^dオビ川－タス川合流点

**表５　エニセイ川とオビ川からカラ海への年間のTSM（全浮遊物質）、POC（粒子状有機炭素）、およびPN（粒子状窒素）排出量**
河川	TSM排出量（10⁶ t/年）	POC排出量（10⁶ t/年）	PN排出量（10⁶ t/年）	出典
エニセイ	5.03	0.57	0.084	本論文
9.2^a			Dittmers et al.(2003)
	0.31		Kohler（oの頭に¨） et al.(2003)
	0.17^b		Lobbes et al.(2000)
4.2^b			Bobrovitskaya et al.(1996)
5.9^b			Gordeev et al.(1996)
14.5^c			Telang et al.(1991)
13^c			Lisitsyn(1972)
オビ	3.76	0.27	0.027	本論文
12.11^d	0.61^d	0.081^d	本論文
14.3^a			Dittmers et al.(2003)
	0.27		Nesterova(1960)
16.2^b			Bobrovitskaya et al.(1996)
18.4			Gordeev et al.(1996)
13.4			Telang et al.(1991)
15.0^b			Lisitsyna et al.(1974)
16			Lisitsyn(1972)
^a完新世の平均値 ^bダム建設後の期間の値 ^cダム建設前の期間の値 ^dオビ川－タス川合流点

　　4.4.5. Applicability of the 2001 budgets
　4.5. Comparison of the budget with other studies
5. Conclusion
Acknowledgements
References

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