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Sea Level Variability in the Arctic Ocean Observed by Satellite Altimetry : Volume 9, Issue 4 (19/07/2012)

By Prandi, P.

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Book Id: WPLBN0003986787
Format Type: PDF Article :
File Size: Pages 27
Reproduction Date: 2015

Title: Sea Level Variability in the Arctic Ocean Observed by Satellite Altimetry : Volume 9, Issue 4 (19/07/2012)  
Author: Prandi, P.
Volume: Vol. 9, Issue 4
Language: English
Subject: Science, Ocean, Science
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2012
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Ablain, M., Cazenave, A., Picot, N., & Prandi, P. (2012). Sea Level Variability in the Arctic Ocean Observed by Satellite Altimetry : Volume 9, Issue 4 (19/07/2012). Retrieved from http://worldlibrary.net/


Description
Description: CLS, Space Oceanography Division, Ramonville St-Agne, France. We investigate sea level variability in the Arctic Ocean from observations. Variability estimates are derived both at the basin scale and on smaller local spatial scales. The periods of the signals studied vary from high frequency (intra-annual) to long term trends. We also investigate the mechanisms responsible for the observed variability. Different data types are used, the main one being a recent reprocessing of satellite altimetry data in the Arctic Ocean.

Satellite altimetry data is compared to tide gauges measurements, steric sea level derived from temperature and salinity fields and GRACE ocean mass estimates. We establish a consistent regional sea level budget over the GRACE availability era (2003–2009) showing that the sea level drop observed by altimetry over this period is driven by ocean mass loss rather than steric effects. The comparison of altimetry and tide gauges time series show that the two techniques are in good agreement regarding sea level trends. Coastal areas of high variability in the altimetry record are also consistent with tide gauges records. An EOF analysis of September mean altimetry fields allows identifying two regions of wind driven variability in the Arctic Ocean: the Beaufort Gyre region and the coastal European and Russian Arctic. Such patterns are related to atmospheric regimes through the Arctic Oscillation and Dipole Anomaly.


Summary
Sea level variability in the Arctic Ocean observed by satellite altimetry

Excerpt
Ablain, M., Cazenave, A., Valladeau, G., and Guinehut, S.: A new assessment of the error budget of global mean sea level rate estimated by satellite altimetry over 1993–2008, Ocean Sci., 5, 193–201, doi:10.5194/os-5-193-2009, 2009.; Bindoff, N., Willebrand, J., Artale, V., Cazenave, A., Gregory, J. M., Gulev, S., Hanawa, H., Le Quéré, C., Levitus, S., Nojiri, Y., Shum, C. K., Talley, L., and Unnikrishnan, A.: Observations: oceanic climate change and sea level, in: Climate change 2007: The physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Solomon, S., Qin, D., Manning, M., Chen, Z., Marquis, M., Averyt, K. B., Tignor, M., and Miller, H. L., Cambridge University Press, UK and New York, USA, 385–432, 2007.; Bouin, M. N. and Wöppelmann, G.: Land motion estimates from GPS at tide gauges: a geophysical evaluation, Geophys. J. Int., 180, 193–209, 2010.; Carrère, L. and Lyard, F.: Modeling the barotropic response of the global ocean to atmospheric wind and pressure forcing, comparison with observations, Geophys. Res. Lett., 30, 1275, doi:10.1029/2002GL016473, 2003.; Cazenave, A. and Llovel, W.: Contemporary sea level rise, Annu. Rev. Mar. Sci., 2, 145–173, doi:10.1146/annurev-marine-120308-081105, 2010.; Chambers, D.: Evaluation of new GRACE time-variable gravity data over the ocean, Geophys. Res. Lett., 33, L17603, 2006.; Giles, K. A., Laxon, S. W., Ridout, A. L., Wingham, D. J., and Bacon, S.: Western Arctic Ocean freshwater storage increased by wind-driven spin-up of the Beaufort Gyre, Nat. Geosci., 5, 194–197, doi:10.1038/NGEO1379, 2012. %linkchecker unauthorized, aber DOI ist i.O.; Henry, O., Prandi, P., Llovel, W., Cazenave, A., Jevrejeva, S., Stammer, D., Meyssignac, B., and Koldunov, N.: Tide gauge based Sea level variations since 1950 along the Norwegian and Russian coasts of the Arctic Ocean; contribution of the steric component, J. Geophys. Res., 117, C06023, 2012.; Ingleby, B. and Huddleston, M.: Quality control of ocean temperature and salinity profiles – historical and real-time data, J. Marine Syst., 65, 158–175, doi:10.1016/j.jmarsys.2005.11.019, 2007.; 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, B., 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, 437–472, 1996.; 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.; Levitus, S., Antonov, J., and Boyer, T.: Warming of the world ocean, 1955–2003, Geophys. Res. Lett., 32, L02604, doi:10.1029/2004GL021592, 2005.; McPhee, M. G., Pr

 

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