Variation of Monsoonal Upwelling: A Response to Changing Solar Radiation

  1. James E. Hansen and
  2. Taro Takahashi
  1. Warren L. Prell

Published Online: 19 MAR 2013

DOI: 10.1029/GM029p0048

Climate Processes and Climate Sensitivity

Climate Processes and Climate Sensitivity

How to Cite

Prell, W. L. (1984) Variation of Monsoonal Upwelling: A Response to Changing Solar Radiation, in Climate Processes and Climate Sensitivity (eds J. E. Hansen and T. Takahashi), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM029p0048

Author Information

  1. Department of Geological Sciences, Brown University, Providence, RI 02912–1846

Publication History

  1. Published Online: 19 MAR 2013
  2. Published Print: 1 JAN 1984

ISBN Information

Print ISBN: 9780875904047

Online ISBN: 9781118666036

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Keywords:

  • Climatology—Congresses;
  • Geophysics—Congresses;
  • Ocean-atmosphere interaction—Congresses

Summary

In the western Arabian Sea, the distribution of planktonic foraminifera is related to coastal upwelling and therefore to the low-level summer monsoon winds which force the upwelling. Records of faunal variation over the past 30 kyr reveal that the Indian Ocean summer monsoon has been both stronger (9 kyr) and weaker (18 kyr). These paleoceanographic reconstructions and analogies to general circulation model simulations suggest that changes in the distribution of seasonal solar radiation and surface albedo are responsible for the changes in monsoon intensity. This study illustrates that the Milankovitch Hypothesis of climate change, which changes the seasonal distribution of solar radiation as a function of orbital variations, applies to low-latitude as well as high-latitude climate changes.