Abstract
Non-stationarity of the current’s field in combination with non-simultaneous measurements at stations of a hydrographic section leads to distortions in the ADCP-based assessments of total geostrophic barotropic transport over the section. These distortions over 49 particular sections from-shore-to-shore in different regions of the World Ocean are investigated on the basis of satellite altimetry data of Sea Level Anomaly, Absolute Dynamic Topography (ADT), and Formal Mapping Error (FME) available in the Internet (http://www.aviso.altimetry.fr). Distortions of barotropic transport have two components. The first is due to a change in the field of currents during measurements from station to station. It can be taken into account in the structure of the transport across the section from satellite altimetry data. The second is related to the displacement of streamlines of the geostrophic current at the ocean surface (ADT isolines) relative to the isobaths and represents the variability range of the instantaneous barotropic transport across the section track estimated on the basis of the same data during the time interval of measurements over this section. Assessments of these distortions are compared with the estimates of the errors of the barotropic transport over particular hydrographic sections. It is shown that the main component of these errors is the FME. Often, both components of the barotropic transport distortion are greater than the barotropic transport error, even for “rapid” sections, which are occupied in 6–12 days. Examples exist, in which significant transport distortions are accumulated during even shorter time periods of 3–5 days. Thus, investigation of the non-stationarity of the velocity field in combination with the non-simultaneity of hydrographic measurements is absolutely necessary for the analyses of the total transport and its structure across a hydrographic section.
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References
Arhan, M., Naveira Garabato, A. C., Heywood, K. J., & Stevens, D. P. (2002). The Antarctic Circumpolar Current between the Falkland Islands and South Georgia. Journal of Physical Oceanography, 32(6), 1914–1931.
Cunningham, S. A., Alderson, S. G., King, B. A., & Brandon, M. A. (2003). Transport and variability of the Antarctic Circumpolar Current in Drake Passage. Journal of Geophysical Research, 108(C5), 8084. https://doi.org/10.1029/2001JC001147.
Donohue, K. A., Tracey, K. L., Watts, D. R., Chidichimo, M. P., & Chereskin, T. K. (2016). Mean Antarctic Circumpolar Current transport measured in Drake Passage. Geophysical Research Letters, 43, 11760–11767. https://doi.org/10.1002/2016GL070319.
Dye, S., Hansen, B., Østerhus, S., Quadfasel, D., & Rudels, B. (2007). The overflow of dense water across the Greenland-Scotland Ridge. Exchanges, 40, 20–22.
Gladyshev, S., Arhan, M., Sokov, A., & Speich, S. (2008). A hydrographic section from South Africa to the southern limit of the Antarctic Circumpolar Current at the Greenwich meridian. Deep-Sea Research Part I, 55(10), 1284–1303.
Gladyshev, S. V., Koshlyakov, M. N., & Tarakanov, R. Y. (2008). Currents in the Drake Passage based on observations in 2007. Oceanology, 48(6), 759–770.
Imawaki, S., Uchida, H., Ichikawa, H., Fukasawa, M., Umatani, S., & ASUKA Group. (2001). Satellite altimeter monitoring the Kuroshio Transport South of Japan. Geophysical Research Letters, 28, 17–20.
Koenig, Z., Provost, C., Park, Y. H., Ferrari, R., & Sennéchael, N. (2016). Anatomy of the Antarctic Circumpolar Current volume transports through Drake Passage. Journal of Geophysical Research: Oceans, 121, 2572–2595. https://doi.org/10.1002/2015JC011436.
Koshlyakov, M. N., Lisina, I. I., Morozov, E. G., & Tarakanov, R. Y. (2007). Absolute Geostrophic Currents in the Drake Passage Based on observations in 2003 and 2005. Oceanology, 47(4), 451–463.
Koshlyakov, M. N., Gladyshev, S. V., Tarakanov, R. Y., & Ryzhikov, N. I. (2010). Deep Currents in the Central Part of the Drake Passage based on the data of the 2008 hydrographic survey. Oceanology, 50(6), 821–828.
Koshlyakov, M. N., Gladyshev, S. V., Tarakanov, R. Y., & Fedorov, D. A. (2011). Currents in the Western Drake Passage according to the observations in January of 2010. Oceanology, 51(2), 187–198.
Koshlyakov, M. N., Gladyshev, S. V., Tarakanov, R. Y., & Fedorov, D. A. (2012). Currents in the Drake Passage based on the observations in November of 2010. Oceanology, 52(3), 299–308.
Koshlyakov, M. N., Gladyshev, S. V., Tarakanov, R. Y., & Fedorov, D. A. (2013). Currents in the Drake Passage by the observations in October–November of 2011. Oceanology, 53(1), 1–12.
Qiu, B., & Joyce, T. M. (1992). Interannual variability in the mid- and low latitude western North Pacific. Journal of Physical Oceanography, 22, 1062–1079.
Rio, M. H., Mulet, S., & Picot. N. (2013). New global mean dynamic topography from a GOCE geoid model, altimeter measurements and oceanographic in-situ data. In Proceedings of the ESA Living Planet Symposium, Edinburg, September 2013.
Roach, A. T., Aagaard, K., Pease, C. H., Salo, S. A., Weingartner, T., Pavlov, V., et al. (1995). Direct measurements of transport and water properties through the Bering Strait. Journal of Geophysical Research, 100(C9), 18443–18457.
Smith, W. H. F., & Sandwell, D. T. (1997). Global seafloor topography from satellite altimetry and ship depth soundings. Science, 277, 1957–1962.
Talley, L. D., Reid, J. L., & Robbins, P. E. (2003). Data-based meridional Overturning stream functions for the global ocean. Journal of Climate, 16(10), 3213–3226.
Acknowledgements
The work was supported by the Russian Science Foundation, grant 16-17-10149. The author is grateful to E. G. Morozov, and K. V. Lebedev for useful comments when preparing the text of this contribution.
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Tarakanov, R.Y. (2018). Influence of the Current Field Non-stationarity and the Non-simultaneity of Hydrographic Measurements on ADCP-based Transport Estimates. In: Velarde, M., Tarakanov, R., Marchenko, A. (eds) The Ocean in Motion. Springer Oceanography. Springer, Cham. https://doi.org/10.1007/978-3-319-71934-4_23
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DOI: https://doi.org/10.1007/978-3-319-71934-4_23
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