Publication Abstracts

Sharma and Miller 2017

Sharma, D., and R.L. Miller, 2017: Revisiting the observed correlation between weekly averaged Indian monsoon precipitation and Arabian sea aerosol optical depth. Geophys. Res. Lett., 44, no. 19, 10006-10016, doi:10.1002/2017GL074373.

Dust influences the Indian summer monsoon on seasonal timescales by perturbing atmospheric radiation. On weekly time scales, aerosol optical depth retrieved by satellite over the Arabian Sea is correlated with Indian monsoon precipitation. This has been interpreted to show the effect of dust radiative heating on Indian rainfall on synoptic (few-day) time scales. However, this correlation is reproduced by Earth System Model simulations, where dust is present but its radiative effect is omitted. Analysis of daily variability suggests that the correlation results from the effect of precipitation on dust through the associated cyclonic circulation. Boundary layer winds that deliver moisture to India are responsible for dust outbreaks in source regions far upwind, including the Arabian Peninsula. This suggests that synoptic variations in monsoon precipitation over India enhance dust emission and transport to the Arabian Sea. The effect of dust radiative heating upon synoptic monsoon variations remains to be determined.

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BibTeX Citation

@article{sh07700z,
  author={Sharma, D. and Miller, R. L.},
  title={Revisiting the observed correlation between weekly averaged Indian monsoon precipitation and Arabian sea aerosol optical depth},
  year={2017},
  journal={Geophys. Res. Lett.},
  volume={44},
  number={19},
  pages={10006--10016},
  doi={10.1002/2017GL074373},
}

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RIS Citation

TY  - JOUR
ID  - sh07700z
AU  - Sharma, D.
AU  - Miller, R. L.
PY  - 2017
TI  - Revisiting the observed correlation between weekly averaged Indian monsoon precipitation and Arabian sea aerosol optical depth
JA  - Geophys. Res. Lett.
VL  - 44
IS  - 19
SP  - 10006
EP  - 10016
DO  - 10.1002/2017GL074373
ER  -

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