Nutrients variation of the Pacific inflow in the western Arctic Ocean

LI Hong-liang; CHEN Jian-fang; GAO Sheng-quan; LU Yong; JIN Hai-yan; JIN Ming-ming; WANG Kui; BAI You-cheng; ZHANG Hai-sheng

Article Contents

Article Navigation > Haiyang Xuebao > 2011 > 33(2): 85-95

LI Hong-liang, CHEN Jian-fang, GAO Sheng-quan, LU Yong, JIN Hai-yan, JIN Ming-ming, WANG Kui, BAI You-cheng, ZHANG Hai-sheng. Nutrients variation of the Pacific inflow in the western Arctic Ocean[J]. Haiyang Xuebao, 2011, 33(2): 85-95.

Citation:

PDF( 1502 KB)

Nutrients variation of the Pacific inflow in the western Arctic Ocean

1.
Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanologica Administion Hangzhou 310012 China
2.
Laboratory of Marine Ecosystem and Biogeochemistry, Second Institute of Oceanography, State Oceanologica Administion Hangzhou 310012 China; State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanologica Administion Hangzhou 310012 China

Received Date: 2010-08-08

Abstract

Abstract

Nutrients were analyzed for Bering Strait and Chukchi shelf water samples collected during the 1999, 2003 and 2008 arctic expedition of China. Concentrations of nutrients are the highest in the west part of the strait and decrease dramatically to the east part in summer. These spatial distributions of nutrients are depend on water masses (mixed layer, halocline waters, the Anadyr Current, the Alaskan coastal Current, Bering Shelf Current and Anadyr River water), primary production and cyclone. Because of phytoplankton uptake and dilution effect of ice melt water, the concentration of nutrients in the mixed layer (10 m) is lower than the deep layer of the meridian section along 170°W. Below 10 m, nutrients concentrations are higher in the north of 70°N than the southern part of Chukchi Sea because of the Herald shoal and different water mass. Besides physical transport, the variation of organic matter re-mineralization may be another important factor for the nutrients distribution patterns. parameter N^*｛N^*= ×0.87｝ was applied to discussing the loss of fixed nitrogen to N₂ via denitrification or anammox processes. The values of N^* in the Bering Strait region are less negative than that in waters of Chukchi Sea, suggested that the Pacific inflow transforms fixed nitrogen to N₂ on the Bering Sea shelf.From the negative N^* value and lower concentration ratio of(nitrate plus nitrite plus ammonium) to phosphate in th Chukchi Sea that it is inferre the loss of fixed nitrogen in the water-sediment interface will increase nitrogen limitation to the Arctic Ocean phytoplankton growth.
- Pacific inflow,
- nutrients,
- denitrification,
- Bering Strait,
- Chukchi Sea

FullText(HTML)

References(23)

References

GREBMEIER J M, COOPER L W, FEDER H M, et al. Ecosystem dynamics of the Pacific-influenced northern Bering and Chukchi Seas in the Amerasian arctic[J]. Progress in Oceanography, 2006, 71: 331—361.

KARL D M. Nutrient dynamics in the deep blue sea [J]. Trends in Microbiology, 2002,10: 410—418.

HOLLAND M M, BITZ C M, TREMBLAY B. Future abrupt reductions in the summer arctic sea ice [J]. Geophysical Research Letters, 2006, 33:L23503, doi: 10.1029/2006GL028024.

GRASSHOFF K, KREMLING K, EHRHARDT M. Methods of Seawater Analysis[M], third, completely revised and extended edition.Weinheim: Wiley-VCH, 1999: 193—198.

GRUBER N, SARMIENTO J L. Global patterns of marine nitrogen fixation and denitrification [J]. Global Biogeochemical Cycles, 1997, 11(2): 235—266.

SARMIENTO J L, GRUBER N. Ocean Biogeochemical Dynamics [M]. Newjersy: Princeton University Press, 2006: 1—29.

WOODGATE R A, AAGAARD K. Revising the Bering Strait fresh water flux into the Arctic Ocean [J]. Geophysical Research Letters, 2005, L02602, doi: 10.1029/2004GL021747.

PICKART R S, WEINGARTNER T J, PIATT L J, et al. Flow of winter transformed Pacific water into the western arctic [J]. Deep-Sea Research: II, 2005, 52:3175—3198.

AAGAARD K, WEINGARTNER T J, DANIELSON S L, et al. Some controls on flow and salinity in Bering Strait [J]. Geophysical Research Letters, 2006, 33.

ZHAO J P, SHI J X, GAO G P, et al. Water mass of the northward through flow in the Bering Strait in summer 2003[J].Acta Oceanologica Sinica, 2006,25(2):1—8.

ITTEKKOT V, UNGER D, HUMBORG C, et al. The Silicon Cycle [M]. Washington: Island Press. 2006: 53—70.

ANDREEV A G, CHEN C T, SEREDA N A. The distribution of the carbonate parameters in the waters of Anadry Bay of the Bering Sea in the western part of the Chukchi Sea [J]. Marine Chemistry, 2010, 50(1): 39—50.

刘子琳,陈建芳,陈忠元,等. 白令海光合浮游生物现存量和初级生产力[J]. 生态学报,2006,26(5):1345—1351.

刘子琳,陈建芳,陈忠元,等. 2008年夏季白令海叶绿素a和初级生产力粒级结构[J]. 海洋学报,2011,33(2):125—134.

赵进平,史久新,金明明,等. 楚科奇海融冰过程中的海水结构研究[J]. 地球科学进展,2010,25(2):154—162.

刘子琳,陈建芳,陈忠元,等. 楚科奇海及其海台区粒度分级叶绿素a与初级生产力[J].生态学报,2007,27(12):4953—4962.

张海生.中国第三次北极科学考察报告 .北京:海洋出版社,2009: 34—82.

史久新,赵进平,矫玉田,等. 太平洋入流及其与北冰洋异常变化的联系 [J]. 极地研究,2004,16(3):253—260.

CODISPOTI L A, FLAGG C, KELLY V, et al. Hydrographic conditions during the 2002 SBI process experiments [J].Deep-Sea Research: II, 2005,52:3199—3226.

KARL D M, LETELIER L R, TUPAS J, et al. The role of nitrogen fixation in biogeochemical cycling in the subtropical North Pacific Ocean [J]. Nature, 1997, 388: 533—538.

DEVOL A H, CODISPOTI L A, CHRISTENSEN J P.Summer and winter denitrification rates in western arctic shelf sediments [J]. Continental Shelf Research, 1997, 17(9):102—91050.

RYSGAARD S, GLUD R N. Anaerobic N₂ production in arctic sea ice [J]. Limnology and Oceanography, 2004, 49(1): 86—94.

CHANG B X, DEVOL A H. Seasonal and spatial patterns of sedimentary denitrification rates in the shelf and slope sediments of the Chukchi Sea [J]. Deep-Sea Research: II, 2008, doi: 10.1016/j.dsr2.2008.10.024.

Relative Articles

Supplements(0)

Cited By

Proportional views