I spent couple of days for searching daily global aerosol deposition datasets but I found that most of the models simulated in monthly time steps. Since daily AOD from different models and satellite observation are available, I was wondering if it is possible to convert AOD into the deposition (wet/dry) rate.
Dear Bikas , As per my knowledge, its not possible to convert AOD into the deposition (wet/dry) rate. This is to the non linear relationship between AOD and amount of aerosols present in the atmosphere. We can get deposition (wet/dry) rate from few regional climate models . One of the examples in RegCM .
Asutosh Acharya Do you think from RegCM, daily deposition data is available?
Bikas, I would partly answer your question about dry deposition. Firstly, Indirect dry deposition rate calculation just from AOD value via inversion technique is a complicated non linear problem and in model it computes the depositional flux/rate(kg/m2/s) by multiplying in-situ concentration(kg/m3) into deposition velocity(m/s) this it self is a function of size distribution modes and resistance terms. I am hoping if you get the size distribution any how from AOD and resistance terms, you may give it a try to compute dry deposition rate. However, also please note here we have neglected wind advection, diffusion and source terms this might not be true solution. So, I would suggest let the model handle those terms instead. Run a model !
Hi. Is it possible to convert aerosol optical depth to the aerosol concentration?
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