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Preprints
https://doi.org/10.5194/osd-12-2683-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/osd-12-2683-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

  06 Nov 2015

06 Nov 2015

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This preprint was under review for the journal OS but the revision was not accepted.

The relationship between Arabian Sea upwelling and Indian monsoon revisited

X. Yi, B. Hünicke, N. Tim, and E. Zorita X. Yi et al.
  • Helmholtz-Zentrum Geesthacht, Institute of Coastal Research, Max-Planck-Str.1, 21502 Geesthacht, Germany

Abstract. Studies based on upwelling indices (sediment records, sea-surface temperature and wind) suggest that upwelling along the western coast of Arabian Sea is strongly affected by the Indian summer monsoon (ISM). In order to examine this relationship directly, we employ the vertical water mass transport produced by the eddy-resolving global ocean simulation STORM driven by meteorological reanalysis over the last 61 years. With its very high spatial resolution (10 km), STORM allows us to identify characteristics of the upwelling system. We analyze the co-variability between upwelling and meteorological and oceanic variables from 1950 to 2010. The analyses reveal high interannual correlations between coastal upwelling and along-shore wind-stress (r=0.73) as well as with sea-surface temperature (r0.83). However, the correlation between the upwelling and the ISM is small and other factors might contribute to the upwelling variability. In addition, no long-term trend is detected in our modeled upwelling time series.

X. Yi et al.

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X. Yi et al.

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Short summary
In this paper, we use the vertical water mass transport data provided by a high-resolution global ocean simulation to study the western Arabian Sea coastal upwelling system. Our results show that: 1). no significant long-term trend is detected in the upwelling time series. 2). the impact of Indian summer monsoon on the simulated upwelling is weak. 3). the upwelling is strongly affected by the sea level pressure gradient and the air temperature gradient.
In this paper, we use the vertical water mass transport data provided by a high-resolution...
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