I want to characterize the direct and indirect atmospheric deposition of dust into the river water and distinguish it from other components which are also contributing to the river water chemistry.
Is it have some use..Best.
http://www.clim-past.net/9/1065/2013/cp-9-1065-2013.pdf
Thank you so much Sir, but i want to know a distinct parameter which can be used to distinguish the atmospheric dust with other components like sewage, waste water, industrial waste etc in river.
Hi Arijeet,
it depends on which component of dust you want to measure. If you focus on nitrate as a N component you can distinguish between deposition and waste water by the dual isotope signal. The nitrate from atmospheric deposition is enriched in 18O with up to 80 permil.
I have attached a paper of Deutsch et al, 2006. They use a mixing model to distinguish different sources.
Cheers,
Tina
Hello Tina,
Thank you so much. This will help a lot. I want to measure the trace elements, ions and nitrates as a New component of atmospheric dust into river water. I would like to use these parameters to distinguish different sources.
Thanks :)
Hi Arijeet
Do you have any form of reference to be able to say in natural state without atmospheric deposition, this is is what river water should be? To be able to distinguish between the different sources would it not help to have a benchmark?
Regards,
Kuda
There is no place on the planet that you could separate out the atmospheric dust in rivers from the farm and river bank erosion material floating in the water, which may be 1,000 fold, because of the relatively little dust that actually gets airborne. See the link attached.
https://www.nrlmry.navy.mil/shared-bin/display_image.cgi?URL=/aerosol_web/globaer/ops_01/india/current.gif
Hi Arijeet,
Normalising the constituents in river water against standard mean seawater is helpful if the constituents are in solution. There are various formulas which will show the relative enrichment or otherwise in species relative to seawater (e.g., Na, Cl, Mg, Ca etc). However, as Craig mentions above aerosolic dust will be completely overwhelmed by endogenous sources.
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