Icebergs as unique lagrangian ecosystems in polar seas

Annual Review of Marine Science

Volumn 5, Issue , 2013, Pages 269-287

  Smith, K L ^a   Sherman, A D ^a   Shaw, T J ^b   Sprintall, J ^c  

^a MONTEREY BAY AQUARIUM RESEARCH INSTITUTE   (United States)

^b UNIVERSITY OF SOUTH CAROLINA   (United States)

^c UNIVERSITY OF CALIFORNIA   (United States)

Author keywords

carbon cycle; carbon export; Labrador Sea; pelagic community; Southern Ocean

Indexed keywords

GLOBAL WARMING; ORGANIC CARBON; SEA ICE; WATER LEVELS;

ARCTIC REGIONS; CARBON CYCLES; CARBON EXPORT; LABRADOR SEA; LAGRANGIAN; PELAGIC COMMUNITY; POLAR REGIONS; PRIMARY PRODUCTION; SOUTHERN OCEAN; WEDDELL SEA;

ECOSYSTEMS;

ABUNDANCE; BIOGEOCHEMISTRY; CARBON CYCLE; CARBON DIOXIDE; CARBON SEQUESTRATION; DRAWDOWN; FRESHWATER INPUT; GLOBAL WARMING; GRAZING; ICEBERG; MARINE ECOSYSTEM; MELTWATER; NITRATE; ORGANIC CARBON; PELAGIC ECOSYSTEM; POLAR REGION; PRIMARY PRODUCTION; STRATIFICATION; TERRESTRIAL DEPOSIT; TURBULENCE; WATER COLUMN;

ATLANTIC OCEAN; LABRADOR SEA; SOUTHERN OCEAN; WEDDELL SEA;

EID: 84872286466     PISSN: 19411405     EISSN: 19410611     Source Type: Journal    
DOI: 10.1146/annurev-marine-121211-172317     Document Type: Article

References (126)

1. Absy JM, Schroder M, Muench R,Hellmer HH. 2008. Early summer thermohaline characteristics and mixing in the western Weddell Sea. Deep-Sea Res. II 55: 1117-31
2. Ainley DG, O'Connor EF, Boekelheide RJ. 1984. The marine ecology of birds in the Ross Sea, Antarctica. Ornithol. Monogr. 32, Am. Ornithol. Union, Washington, DC. 97 pp.
3. Anisimov O, Fitzharris B. 2001. Polar regions (Arctic and Antarctic). In Climate Change 2001: Impacts, Adaptation and Vulnerability: Contribution of Working Group II to the Third Assessment Report of the Intergovernmental Panel on Climate Change, ed. JJ McCarthy, OF Canziani, NA Leary, DJ Dokken, KS White, pp. 801-41. Cambridge: Cambridge Univ. Press
4. Arrigo KR, van Dijken GL. 2003. Impact of iceberg C-19 on Ross Sea primary production. Geophys. Res. Lett. 30: 1836
5. Arrigo KR, van Dijken GL, Ainley DG, Fahnestock MA, Markus T. 2002. Ecological impact of a large Antarctic iceberg. Geophys. Res. Lett. 29: 1104
6. Atkinson A, Schmidt K, Fielding S, Kawaguchi S, Geissler PA. 2012. Variable food absorption by Antarctic krill: relationships between diet, egestion rate and the composition and sinking rates of their fecal pellets. Deep-Sea Res. II 59-60: 147-58
7. Atkinson A, Siegel V, Pakhomov E, Rothery P. 2004. Long-term decline in krill stock and increase in salps within the Southern Ocean. Nature 432: 100-3
8. Avsic T, Karstensen J, Send U, Fischer J. 2006. Interannual variability of newly formed Labrador Sea Water from 1994 to 2005. Geophys. Res. Lett. 33: L21S02
9. Bagniewski W, Fennel K, Perry MJ, D'Asaro EA. 2011. Optimizing models of theNorth Atlantic spring bloom using physical, chemical and bio-optical observations from a Lagrangian float. Biogeosciences 8: 1291-307
10. Ballantyne J. 2002. A multidecadal study of the number of Antarctic icebergs using scatterometer data. Brigham Young Univ. Rep., Feb. 27. http://www.scp.byu.edu/data/iceberg/IcebergReport.pdf
11. Bernard KS, Steinberg DK, Schofield OME. 2012. Summertime grazing impact of the dominant macrozooplankton off the Western Antarctic Peninsula. Deep-Sea Res. I 62: 111-22
12. Biggs D. 1978. Non-biogenic fixed nitrogen in Antarctic surface waters. Nature 276: 96-97
13. Blain S, Queguiner B, Armand L, Belviso S, Bombled B, et al. 2007. Effect of natural iron fertilization on carbon sequestration in the Southern Ocean. Nature 446: 1070-71
14. Boyd PW, Watson AJ, Law CS, Abraham ER, Trull T, et al. 2000. Mesoscale phytoplankton bloom in the polar Southern Ocean stimulated by iron fertilization. Nature 407: 695-701
15. Brierley AS, Fernandes PG, Brandon MA, Armstrong F, Millard NW, et al. 2002. Antarctic krill under sea ice: elevated abundance in a narrow band just south of ice edge. Science 295: 1890-92
16. Cazenave A, Llovel W. 2010. Contemporary sea level rise. Annu. Rev. Mar. Sci. 2: 145-71
17. Cefarelli A, Vernet M, Ferrario ME. 2011. Phytoplankton composition and abundance in relation to freefloating Antarctic icebergs. Deep-Sea Res. II 58: 1436-50
18. Coale KH, Johnson KS, Chavez FP, Buesseler KO, Barber RT, et al. 2004. Southern Ocean iron enrichment experiment: carbon cycling in high-and low-Si waters. Science 304: 408-14
19. Cook AJ, Fox AJ, Vaughan DG, Ferrigno JG. 2005. Retreating glacier fronts on the Antarctic Peninsula over the past half-century. Science 308: 541-44
20. De Angelis HD, Skvarca P. 2003. Glacier surge after ice shelf collapse. Science 299: 1560-62
21. de Baar HJW, Buma AGJ, Nolting RF, Cad́ee GC, Jacques G, Tŕeguer PJ. 1990. On iron limitation of the Southern Ocean: experimental observations in the Weddell and Scotia Seas. Mar. Ecol. Prog. Ser. 65: 105-22
22. de Baar HJW, de Jong JTM, Bakker DCE, L̈oscher BM, Veth C, et al. 1995. Importance of iron for plankton blooms and carbon dioxide drawdown in the Southern Ocean. Nature 373: 412-15
23. Dowdeswell JA, Bamber JL. 2007. Keel depths of modern Antarctic icebergs and implications for sea-floor scouring in the geological record. Mar. Geol. 243: 120-31
24. Dowdeswell JA, Whittington RJ, Hodgkins R. 1992. The sizes, frequencies, and freeboards of East Greenland icebergs observed using ship radar and sextant. J. Geophys. Res. 97: 3515-28
25. Dulaiova H, Ardelan MV, Henderson PB, Charette MA. 2009. Shelf-derived iron inputs drive biological productivity in the southern Drake Passage. Glob. Biogeochem. Cycles 23: GB4014
26. Ferrario ME, Cefarelli AO, Robison BH, Vernet M. 2011. Thalassioneis signyensis (Bacillariophyceae) from northwest Weddell Sea icebergs, and emendation of the generic description. J. Phycol. 48: 222-30
27. Frajka-Williams E, Rhines PB, Eriksen CC. 2009. Physical controls and mesoscale variability in the Labrador Sea spring phytoplankton bloom observed by Seaglider. Deep-Sea Res. I 56: 2144-61
28. Gade HG. 1979. Melting of ice in sea water: a primitive model with application to the Antarctic ice shelf and icebergs. J. Phys. Oceanogr. 9: 189-98
29. Gardner AS, Moholdt G, Wouters B, Wolken GJ, Burgess DO, et al. 2011. Sharply increased mass loss from glaciers and ice caps in the Canadian Arctic archipelago. Nature 473: 357-60
30. Gervais F, Riebesell U, Gorbunov MY. 2002. Changes in primary productivity and chlorophyll a in response to iron fertilization in the Southern Polar Frontal Zone. Limnol. Oceanogr. 47: 1324-35
31. Gladstone RM, Bigg GR, Nicholls KW. 2001. Iceberg trajectory modeling and meltwater injection in the Southern Ocean. J. Geophys. Res. 106: 19903-15
32. Gradinger R. 1999. Integrated abundance and biomass of sympagic meiofauna in Arctic and Antarctic pack ice. Polar Biol. 22: 169-77
33. Greene CH, Pershing AJ, Cronin TM, Ceci N. 2008. Arctic climate change and its impact on the ecology of the North Atlantic. Ecology 89: S24-38
34. Harrison WG, Li WKW. 2008. Phytoplankton growth and regulation in the Labrador Sea: light and nutrient limitation. J. Northwest Atl. Fish. Sci. 39: 71-82
35. Helly JJ, Kaufmann RS, Stephenson GR, Vernet M. 2011. Cooling, dilution and mixing of ocean water by free-drifting icebergs in the Weddell Sea. Deep-Sea Res. II 58: 1346-63
36. Holmquist C. 1958. An observation on young specimens of Ammodytes dubius. Meddelelser Grønl. 159: 1-14
37. Hood M. 2010. Giant Greenland iceberg a climate "warning sign." AFP, Aug. 16. http://www.google. com/hostednews/afp/article/ALeqM5inGfVX69zbp- Gs4-y0FEdtLKMLeA
38. Huppert HE, Turner JS. 1980. Ice blocks melting into a salinity gradient. J. Fluid Mech. 100: 367-84
39. Int. Ice Patrol. 2011. Report of the International Ice Patrol in the North Atlantic: 2010 season. Bull. 96, CG-188-65, Int. Ice Patrol, New London, CT. 58 pp.
40. Jacobs SS, Gordon AL, Amos AF. 1979. Effect of glacial ice melting on the Antarctic surface water. Nature 277: 469-71
41. Jacobs SS, Helmer H, Jenkins A. 1996. Antarctic ice sheet melting in the southeast Pacific. Geophys. Res. Lett. 23: 957-60
42. Jacobs SS, Huppert HE, Holdsworth G, Drewry DJ. 1981. Thermohaline steps induced by melting of the Erebus Glacier tongue. J. Geophys. Res. 86: 6547-55
43. Joiris CR. 1991. Spring distribution and ecological role of seabirds and marine mammals in the Weddell Sea, Antarctica. Polar Biol. 11: 415-24
44. Kang SH, Kang JS, Lee S, Chung KH, Kim D, Park MG. 2001. Antarctic phytoplankton assemblages in the marginal ice zone of the northwestern Weddell Sea. J. Plankton Res. 23: 333-52
45. Kaufmann RS, Robison BH, Reisenbichler KR, Sherlock RE, Osborn KJ. 2011. Composition and structure of macrozooplankton and micronekton communities in the vicinity of free-drifting Antarctic icebergs. Deep-Sea Res. II 58: 1469-84
46. Kaufmann RS, Smith KL, Baldwin RJ, Glatts RC, Robison BH, Reisenbichler KR. 1995. Effects of seasonal pack ice on the distribution of macrozooplankton and micronekton in the northwestern Weddell Sea. Mar. Biol. 124: 387-97
47. Kellogg CTE, Carpenter SD, Renfro AA, Sallon A, Michel C, et al. 2011. Evidence for microbial attenuation of particle flux in the Amundsen Gulf and Beaufort Sea: elevated hydrolytic enzyme activity on sinking aggregates. Polar Biol. 34: 2007-23
48. Knox GA. 1994. The Biology of the Southern Ocean. Cambridge: Cambridge Univ. Press. 444 pp.
49. Kohfeld KE, Le Quere C, Harrison SP, Anderson RF. 2005. Role of marine biology in glacial-interglacial CO2 cycles. Science 308: 74-78
50. Kristensen M. 1983. Iceberg calving and deterioration in Antarctica. Prog. Phys. Geogr. 7: 313-28
51. Lancelot C, de Montety A, Goosse H, Becquevort S, Schoemann V, et al. 2009. Spatial distribution of the iron supply to phytoplankton in the Southern Ocean: a model study. Biogeosciences 6: 2861-78
52. Law CS, Abraham ER, Watson AJ, Liddicoat MI. 2003. Vertical eddy diffusion and nutrient supply to the surface mixed layer of the Antarctic Circumpolar Current. J. Geophys. Res. 108: 3272
53. Lazier JRN, Hendry R, Clarke A, Yashayev L, Rhines P. 2002. Convection and restratification in the Labrador Sea, 1990-2000. Deep-Sea Res. I 49: 1819-35
54. Lenn YD, Wiles PJ, Torres-Valdes S, Abrahamsen EP, Rippeth TP, et al. 2009. Vertical mixing at intermediate depths in the Arctic boundary current. Geophys. Res. Lett. 36: L05601
55. Lin H, Rauschenberg S, Hexel CR, Shaw TJ, Twining BS. 2011. Free-drifting icebergs as sources of iron to the Weddell Sea. Deep-Sea Res. II 58: 1392-406
56. Lin H, Twining BS. 2012. Chemical speciation of iron in Antarctic waters surrounding free-drifting icebergs. Mar. Chem. 128-29: 81-91
57. Lizotte MP, Arrigo KR, eds. 1998. Antarctic Sea Ice: Biological Processes, Interactions and Variability. Antarct. Res. Ser. Vol. 73. Washington, DC: Am. Geophys. Union. 198 pp.
58. Long DG, Ballantyne J, Bertoia C. 2002. Is the number of icebergs around Antarctica increasing? Eos Trans. AGU 42: 469-74
59. L̈oscher BM, de Baar HJW, de Jong JTM, Veth C, Dehairs F. 1997. The distribution of Fe in the Antarctic Circumpolar Current. Deep-Sea Res. II 44: 143-87
60. Maher BA, Dennis PF. 2001. Evidence against dust-mediated control of glacial-interglacial changes in atmospheric CO2. Nature 411: 176-80
61. Martin JH. 1990. Glacial-interglacial CO2 change: the iron hypothesis. Paleoceanography 5: 1-13
62. Martin JH, Gordon RM, Fitzwater SE. 1990. Iron in Antarctic waters. Nature 345: 156-58
63. Martinson DG, Stammerjohn SE, Ianuzzi RA, Smith RC, Vernet M. 2008. Western Antarctic Peninsula physical oceanography and spatio-temporal variability. Deep-Sea Res. II 55: 1964-87
64. McPhail SD, Furlong ME, Pebody M, Perrett JR, Stevenson P, et al. 2009. Exploring beneath the PIG Ice Shelf with the Autosub3 AUV. In Oceans 2009 IEEE Bremen: Balancing Technology with Future Needs. Piscataway, NJ: Inst. Electr. Electron. Eng. 6 pp. http://eprints.soton.ac.uk/66414
65. Muench RD, Padman L, Howard SL, Fahrbach E. 2002. Upper ocean diapycnal mixing in the northwest Weddell Sea. Deep-Sea Res. II 49: 4843-61
66. Murray AE, Peng V, Tyler C, Wagh P. 2011. Marine bacterioplankton biomass, activity and community structure in the vicinity of Antarctic icebergs. Deep-Sea Res. II 58: 1407-21
67. Neshyba S. 1977. Upwelling by icebergs. Nature 267: 507-8
68. Orheim O. 1988. Antarctic icebergs-production, distribution and disintegration. Ann. Glaciol. 11: 205
69. (Abstr.) Parker BC, Zeller EJ, Heiskell LE, Thompson WJ. 1978. Nonbiogenic fixed nitrogen in Antarctica and some ecological implications. Nature 271: 651-52
70. Pepin P, Colbourne E, Maillet G. 2011. Seasonal patterns in zooplankton community structure on the Newfoundland and Labrador shelf. Prog. Oceanogr. 91: 273-85
71. Petit JR, Jouzel J, Raynaud D, Barkov NI, Barnola J-M, et al. 1999. Climate and atmospheric history of the past 420,000 years from the Vostok ice core, Antarctica. Nature 399: 429-36
72. Pollard RT, Salter I, Sanders RJ, Lucas MI, Moore CM, et al. 2009. Southern Ocean deep-water carbon export enhanced by natural iron fertilization. Nature 457: 577-81
73. Poulton AJ, Charalampopoulou A, Young JR, Tarran GA, Lucas MI, Quartly GD. 2010. Coccolithophore dynamics in non-bloom conditions during late summer in the central Iceland Basin ( July-August 2007). Limnol. Oceanogr. 55: 1601-13
74. Pritchard HD, Arthern RJ, Vaughan DG, Edwards LA. 2009. Extensive dynamic thinning on the margins of the Greenland and Antarctic ice sheets. Nature 461: 971-75
75. Rainville L, Winsor P. 2008. Mixing across the Arctic Ocean: microstructure observations during the Beringia 2005 Expedition. Geophys. Res. Lett. 35: L08606
76. Raiswell R. 2011. Iceberg-hosted nanoparticulate Fe in the Southern Ocean: mineralogy, origin, dissolution kinetics and source of bioavailable Fe. Deep-Sea Res. II 58: 1364-75
77. Raiswell R, Benning LG, Tranter M, Tulaczyk MS. 2008. Bioavailable iron in the Southern Ocean: the significance of the iceberg conveyor belt. Geochem. Trans. 9: 7
78. Renner AHH, Thorpe SE, Heywood KJ, Murphy EJ, Watkins JL, Meredith MP. 2012. Advective pathways near the tip of the Antarctic Peninsula: trends, variability and ecosystem implications. Deep-Sea Res. I 63: 91-123
79. Ribic CA, Ainley DG, Fraser WR. 1991. Habitat selection by marine mammals in the marginal ice zone. Antarct. Sci. 3: 181-86
80. Rignot E, Velicogna I, van den Broeke MR, Monaghan A, Lenaerts JTM. 2011. Acceleration of the contribution of the Greenland and Antarctic ice sheets to sea level rise. Geophys. Res. Lett. 38: L05503
81. Robison BH, Vernet M, Smith KL. 2011. Algal communities attached to free-drifting Antarctic icebergs. Deep-Sea Res. II 58: 1451-56
82. Rothlisberger R, Bigler M, Wolff EW, Joos F, Monnin E, et al. 2004. Ice core evidence for the extent of past atmospheric CO2 change due to iron fertilization. Geophys. Res. Lett. 31: L16207
83. Ruhl HA, Ellena JA, Wilson RC, Helly JJ. 2011. Seabird aggregation around free-drifting icebergs in the northwest Weddell Sea and Scotia Seas. Deep-Sea Res. II 58: 1497-506
84. Sancetta C. 1992. Primary production in the glacial North Atlantic and North Pacific Oceans. Nature 360: 249-51
85. Sarmiento JL, Orr JC. 1991. Three-dimensional simulations of the impact of Southern Ocean nutrient depletion on atmospheric CO2 and ocean chemistry. Limnol. Oceanogr. 36: 1928-50
86. Scambos TA, Hulbe C, Fahnestock M, Bohlander J. 2000. The link between climate warming and break-up of ice shelves in the Antarctic Peninsula. J. Glaciol. 46: 516-30
87. Scambos TA, Sergienko O, Sargent A, MacAyeal D, Fastook J. 2005. ICESat profiles of tabular iceberg margins and iceberg breakup at low latitudes. Geophys. Res. Lett. 32: L23S09
88. Schmidt K, Atkinson A, Steigenberger S, Fielding S, Lindsay MCM, et al. 2011. Seabed foraging by Antarctic krill: implications for stock assessment, bentho-pelagic coupling, and the vertical transfer of iron. Limnol. Oceanogr. 56: 1411-28
89. Schodlok MP, Hellmer HH, Rohardt G, Fahrbach GE. 2006. Weddell Sea iceberg drift: five years of observations. J. Geophys. Res. 111: C06018
90. Schwarz JN, Schodlok MP. 2009. Impact of drifting icebergs on surface phytoplankton biomass in the Southern Ocean: ocean colour remote sensing and in situ iceberg tracking. Deep-Sea Res. I 56: 1727-41
91. Sedwick PN, Ditukkio GR, Mackey DJ. 2000. Iron and manganese in the Ross Sea, Antarctica: seasonal iron limitation in Antarctic shelf waters. J. Geophys. Res. 105: 11321-36
92. Shaw TJ, Hexel CR, Smith KL, Sherman AD, Dudgeon R, et al. 2011a. 234Th-based carbon export around free-drifting icebergs in the Southern Ocean. Deep-Sea Res. II 58: 1384-91
93. Shaw TJ, Raiswell RW, Hexel CR, Vu HP, Moore WS, et al. 2011b. Input, composition and potential impact of terrigenous material from free-drifting icebergs in the Weddell Sea. Deep-Sea Res. II 58: 1376-83
94. Sherlock RE, Reisenbichler KR, Bush SL, Osborn KJ, Robison BH. 2011. Near-field zooplankton, ice-face biota, and proximal hydrography of free-drifting Antarctic icebergs. Deep-Sea Res. II 58: 1457-68
95. Sherman AD, Hobson BW, McGill PR, Davis R, McClune M, Smith KL. 2011. Lagrangian sediment traps for sampling at discrete depths beneath free-drifting icebergs. Deep-Sea Res. II 58: 1327-35
96. Shulenberger E. 1983. Water-column studies near a melting Arctic iceberg. Polar Biol. 2: 149-58
97. Sigman DM, Hain MP, Haug GH. 2010. The polar ocean and glacial cycles in atmosphericCO2 concentration. Nature 466: 47-55
98. Smith KL, Robison BH, Helly JJ, Kaufmann RS, Ruhl HA, et al. 2007. Free-drifting icebergs: hot spots of chemical and biological enrichment in the Weddell Sea. Science 317: 478-82
99. Smith KL, Sherman AD, Shaw TJ, Murray AE, Vernet M, Cefarelli AO. 2011. Carbon export associated with free-drifting icebergs in the Southern Ocean. Deep-Sea Res. II 58: 1485-96
100. Smith WO, Nelson DM. 1986. The importance of ice edge phytoplankton production in the Southern Ocean. BioScience 36: 251-57
101. Stammerjohn SE, Martinson DG, Smith RC, Ianuzzi RA. 2008. Sea ice in the western Antarctic Peninsula region: spatio-temporal variability from ecological and climate change perspectives. Deep-Sea Res. II 55: 2041-58
102. Steig EJ, Schneider DP, Rutherford SD, Mann ME, Comiso JC, Shindell DT. 2009. Warming of the Antarctic ice-sheet surface since the 1957 International Geophysical Year. Nature 457: 459-63
103. Stephenson GR, Sprintall J, Gille ST, Vernet M, Helly JJ, Kaufmann RS. 2011. Subsurface melting of a free-floating Antarctic Iceberg. Deep-Sea Res. II 58: 1336-45
104. Stevens CL, Stewart CL, Robinson NJ, Williams MJM, Haskell TG. 2011. Flow and mixing near a glacier tongue: a pilot study. Ocean Sci. 7: 293-304
105. Stone GS. 2003. Ice Island. Boston: N. Eng. Aquar. Press. 75 pp.
106. Stuart KM, Long DG. 2011. Tracking large tabular icebergs using the SeaWinds Ku-band microwave scatterometer. Deep-Sea Res. II 58: 1285-300
107. Sundfjord A, Fer Y, Kasajima Y, Svendsen H. 2007. Observations of turbulent mixing and hydrography in the marginal ice zone of the Barents Sea. J. Geophys. Res. 112: C05008
108. Thomas DN, Dieckmann GS. 2002. Antarctic sea ice-a habitat for extremophiles. Science 295: 641-44
109. Thompson AF,Heywood KJ. 2008. Frontal structure and transport in the northwestern Weddell Sea. Deep-Sea Res. I 55: 1229-51
110. Thompson DWJ, Solomon S. 2002. Interpretation of recent southern hemisphere climate change. Science 296: 895-99
111. Tournadre J, Whitmer K, Girard-Ardhuin F. 2008. Iceberg detection in open water by altimeter waveform analysis. J. Geophys. Res. 113: CO8040
112. Tremblay J-E, Gagnon J. 2009. The effects of irradiance and nutrient supply on the productivity of Arctic waters: a perspective on climate change. In Influence of Climate Change on the Changing Arctic and Sub-Arctic Conditions, ed. JCJ Nihoul, AG Kostianoy, pp. 73-93. Dordrecht: Springer
113. van den Broeke M, Bamber J, Ettema J, Rignot E, Schrama E, et al. 2009. Partitioning recent Greenland mass loss. Science 326: 984-86
114. Vaughan DG, Marshall GJ, ConnolleyWM,King JC, Mulvaney R. 2001. Devil in the detail. Science 293: 1777-79
115. Velicogna I, Wahr J. 2006. Measurements of time-variable gravity show mass loss in Antarctica. Science 311: 1754-56
116. Vernet M, Sines K, Chakos D, Cefarelli AO, Ekern L. 2011. Impacts on phytoplankton dynamics by freedrifting icebergs in the NW Weddell Sea. Deep-Sea Res. II 58: 1422-35
117. Wahlin AK, Yuan X, Bjork G, Nohr C. 2010. Inflow of warm Circumpolar Deep Water in the central Amundsen Shelf. J. Phys. Oceanogr. 40: 1427-34
118. Westerlund S, Öhman P. 1991. Iron in the water column of theWeddell Sea. Mar. Chem. 35: 199-217
119. Williams RN, Rees WG, Young NW. 1999. A technique for the identification and analysis of icebergs in synthetic aperture radar images of Antarctica. Int. J. Remote Sens. 20: 3183-99
120. Wingham DJ, Wallis DW, Shephard A. 2009. Spatial and temporal evolution of the Pine Island Glacier thinning, 1995-2006. Geophys. Res. Lett. 36: L17501
121. Wolff EW, FischerH, Fundel F, Ruth U, Twarloh B, et al. 2006. Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles. Science 440: 491-96
122. Woodworth-Lynas CMT, Dowdeswell EK, Dowdeswell JA. 2009. Decadal variations in iceberg climate, Greenland and Ellesmere Island: a pilot study. Final Rep. 09-01, Petra Int., Geol. Surv. Can. (Atl.), Mississauga, Can. 33 pp.
123. Yasheyaev I. 2007. Hydrographic changes in the Labrador Sea, 1960-2005. Prog. Oceanogr. 73: 247-76
124. Yebra L,Harris RP, Head EJH, Yashayaev I, Harris LR, Hirst AG. 2009. Mesoscale physical variability affects zooplankton production in the Labrador Sea. Deep-Sea Res. I 56: 703-15
125. Zwally HJ, Comiso JC, Parkinson CL, Cavalieri DJ, Gloersen P. 2002. Variability of Antarctic sea ice 1979-1998. J. Geophys. Res. 107: 3041
126. Zwally HJ, Giovinetto MB, Li J, Cornejo HG, Beckley MA, et al. 2005. Mass changes of the Greenland and Antarctic ice sheets and shelves and contributions to sea-level rise: 1992-2002. J. Glaciol. 51: 509-27