Can you identify these two paintings? Desert Monument and Noise

I came across these two paintings which I really like, and I have them hanging on my wall in my living room. The previous owner does not any information on them. I am ignorant of art in general and would like some help identifying them. The artist seems to have the initials AA or MAA. The first one is titled "Desert Monument" and was painted in 1995. The second one is titled "Noise" and was painted in 1996. Several Google searches have turned up nothing helpful. Thanks in advance for your help.

Desert Monument: http://imgur.com/Rsr9o,KQsqv#0
Noise: http://imgur.com/Rsr9o,KQsqv#1