You wrote

Does anyone know of any measurements of nitrogen isotopes on NOx or acid
precipitation, particularly from midwest or Great Lakes region?
Thanks,
Dave Hodell
>>
>>
>>______________________________
>>David A. Hodell
>>Department of Geology
>>University of Florida
>>1112 Turlington Hall
>>Gainesville, FL 32611
>>904-392-6137 (voice)
>>904-392-9294 (Fax)
>>[log in to unmask]
>>
>>
>>
You may find some useful references in the book

Lajtha and Michener (eds) (1994) Stable isotopes in ecology and
environmental science, methods in ecology, Blackwell scientific
Publications


cheers
stefano


-------------------------------
Dr. Stefano Bernasconi
Geologisches Institut
ETH-Zentrum
CH-8092 Zuerich
Switzerland
Tel. ..41-1-632 3693
fax:  ..41-1-632 1080
e-mail: [log in to unmask]
-------------------------------