Nitrous oxide emissions from the Arabian Sea: A synthesis

H. W. Bange (1) , M. O. Andreae (1) , S. Lal (2) , C. S. Law (3) , S. W. A. Naqvi (4) , P. K. Patra (2) , T. Rixen (5) , R. C. Upstill-Goddard (6)

1 MPIC - Max Planck Institute for Chemistry
2 PRL - Physical Research Laboratory [Ahmedabad]
3 Plymouth Marine Laboratory
4 NIO - CSIR National Institute of Oceanography [India]
5 University of Hamburg
6 University of Newcastle

We computed high-resolution (1^o latitude × 1^o longitude) seasonal and annual nitrous oxide (N₂O) concentration fields for the Arabian Sea surface layer using a database containing more than 2400 values measured between December 1977 and July 1997. N₂O concentrations are highest during the southwest (SW) monsoon along the southern Indian continental shelf. Annual emissions range from 0.33 to 0.70 Tg N₂O and are dominated by fluxes from coastal regions during the SW and northeast monsoons. However, the tendency to focus on measurements in locally restricted features in combination with insufficient seasonal data coverage leads to considerable uncertainties of the concentration fields and thus in the flux estimates, especially in the coastal zones of the northern and eastern Arabian Sea.

Domaines: Océan, Atmosphère

H. W. Bange, M. O. Andreae, S. Lal, C. S. Law, S. W. A. Naqvi, et al.. Nitrous oxide emissions from the Arabian Sea: A synthesis. Atmospheric Chemistry and Physics Discussions, 2001, 1 (1), pp.167-192. ⟨hal-00300860⟩