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Heat Loss from the Atlantic Water Layer in the St. Anna Trough (Northern Kara Sea): Causes and Consequences : Volume 11, Issue 1 (20/02/2014)

By Dmitrenko, I. A.

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Book Id: WPLBN0004020836
Format Type: PDF Article :
File Size: Pages 31
Reproduction Date: 2015

Title: Heat Loss from the Atlantic Water Layer in the St. Anna Trough (Northern Kara Sea): Causes and Consequences : Volume 11, Issue 1 (20/02/2014)  
Author: Dmitrenko, I. A.
Volume: Vol. 11, Issue 1
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2014
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Kirillov, S. A., Koldunov, N. V., Serra, N., Makhotin, M., Aksenov, Y., Dmitrenko, I. A.,...Barber, D. (2014). Heat Loss from the Atlantic Water Layer in the St. Anna Trough (Northern Kara Sea): Causes and Consequences : Volume 11, Issue 1 (20/02/2014). Retrieved from http://worldlibrary.net/


Description
Description: Centre for Earth Observation Science, University of Manitoba, Winnipeg, Canada. A distinct, subsurface density front along the eastern St. Anna Trough in the northern Kara Sea is inferred from hydrographic observations in 1996 and 2008–2010. Direct velocity measurements show a persistent northward subsurface current (~ 20 cm s−1) along the St. Anna Trough eastern flank. This sheared flow, carrying the outflow from the Barents and Kara Seas to the Arctic Ocean, is also evident from shipboard observations as well as from geostrophic velocities and numerical model simulations. Although no clear evidence for the occurrence of shear instabilities could be obtained, we speculate that the enhanced vertical mixing along the St. Anna Trough eastern flank promoted by a vertical velocity shear favors the upward heat loss from the intermediate warm Atlantic water layer. The associated upward heat flux is inferred to 50–100 W m−2 using hydrographic data and model simulations. The zone of lowered sea ice thickness and concentration essentially marks the Atlantic water pathway in the St. Anna Trough and adjacent Nansen Basin continental margin from both sea-ice remote sensing observations and model simulations. In fact, the seaice shows a consistently delayed freeze-up onset during fall and a reduction in the seaice thickness during winter. This is consistent with our results on the enhanced Atlantic water heat loss along the Atlantic water pathway in the St. Anna Trough.1

1Dedicated to the memory of our colleague Klaus Hochheim who tragically lost his life in the Arctic expedition in September 2013


Summary
Heat loss from the Atlantic water layer in the St. Anna Trough (northern Kara Sea): causes and consequences

Excerpt
Årthun, M. and Schrum, C.: Ocean surface heat flux variability in the Barents Sea, J. Marine Syst., 83, 88–98, 2010.; Årthun, M., Eldevik, T., Smedsrud, L. H., Skagseth Ø., and Ingvaldsen, R. B.: Quantifying the influence of Atlantic heat on Barents Sea ice variability and retreat, J. Climate, 25, 4736–4743, 2012.; Beszczynska-Möller, A., Fahrbach, E., Schauer, U., and Hansen, E.: Variability in Atlantic water temperature and transport at the entrance to the Arctic Ocean, 1997–2010, ICES J. Mar. Sci., 69, 852–863, doi:10.1093/icesjms/fss056, 2012.; Boyer, T., Levitus, S., Garcia, H., Locarnini, R. A., Stephens, C., and Antonov, J.: Objective analyses of annual, seasonal, and monthly temperature and salinity for the World Ocean on a 0.25° grid, Int. J. Climatol., 25, 931–945, doi:10.1002/joc.1173, 2005.; Dmitrenko, I. A., Kirillov, S. A., Ivanov, V. V., and Woodgate, R. A.: Mesoscale Atlantic water eddy off the Laptev Sea continental slope carries the signature of upstream interaction, J. Geophys. Res., 113, C07005, doi:10.1029/2007JC004491, 2008.; Dmitrenko, I. A., Bauch, D., Kirillov, S. A., Koldunov, N., Minnett, P. J., Ivanov, V. V., Hölemann, J. A., and Timokhov, L. A.: Barents Sea upstream events impact the properties of Atlantic water inflow into the Arctic Ocean: evidence from 2005–2006 downstream observations, Deep-Sea Res.-Pt. I, 56, 513–527, 2009.; Dmitrenko, I. A., Kirillov, S. A., Ivanov, V. V., Rudels, B., Serra, N., and Koldunov, N. V.: Modified halocline water over the Laptev Sea continental margin: historical data analysis, J. Climate, 25, 5556–5565, 2012.; Ezraty, R., Girard-Ardhuin, F., and Croizé-Fillon, D.: Sea ice drift in the central Arctic using the 89 GHz brightness temperatures of the advanced microwave scanning radiometr, User's Manual, IFREMER, Brest, France, 2007.; Gammelsrød, T., Leikvin, Ø., Lien, V., Budgell, W. P., Loeng, H., and Maslowski, W.: Mass and heat transports in the NE Barents Sea: observations and models, J. Marine Syst., 75, 56–69, 2009.; Hanzlick, D. and Aagaard, K.: Freshwater and Atlantic Water in the Kara Sea, J. Geophys. Res., 85, 4937–4942, 1980.; Ivanov, V. V., Alexeev, V. A., Repina, I., Koldunov, N. V., and Smirnov, A.: Tracing Atlantic water signature in the Arctic sea ice cover east of Svalbard, Adv. Meteorol., 2012, 201818, doi:10.1155/2012/201818, 2012.; Kalnay, E., Kanamitsu, M., Kistler, R., Collins, W., Deaven, D., Gandin, L., Iredell, M., Saha, S., White, G., Woollen, J., Zhu, Y., Leetmaa, A., Reynolds, R., Chelliah, M., Ebisuzaki, W., Higgins, W., Janowiak, J., Mo, K. C., Ropelewski, C., Wang, J., Jenne, R., and Joseph, D.: The NCEP/NCAR 40 Year Reanalysis Project, B. Am. Meteorol. Soc., 77, 437–471, 1996.; Schauer, U., Loeng, H., Rudels, B., Ozhigin, V. K., and Dieck, W.: Atlantic Water flow through the Barents and Kara Seas, Deep-Sea Res.-Pt. I, 49, 2281–2298, 2002a.; Kirillov, S. A., Dmitrenko, I. A., Ivanov, V. V., Aksenov, E. O., Makhotin, M. S., and de Quevas, B. A.: The influence of atmospheric circulation on the dynamics of the intermediate water layer in the eastern part of the St. Anna Trough, Dokl. Earth Sci., 444, 630–633, 2012.; Kwok, R., Cunningham, G. F., Wensnahan, M., Rigor, I., Zwally, H. J., and Yi, D.: Thinning and volume loss of the Arctic Ocean sea ice cover: 2003–2008, J. Geophys. Res., 114, C07005, doi:10.1029/2009JC005312, 2009.; Large, W. G., McWilliams, J., and Doney, S. C.: Ocean vertical mixing: a review and a model with a nonlocal boundary layer parameterization, Rev. Geophys., 32, 363–403, 1994.; Lenn, Y. D., Rippeth, T. P., Old, C. P., Bacon, S., Polyakov, I., Ivanov, V., and Hölemann, J.: Intermittent

 

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