Dipole Moments of Highly Vibrationally Excited Water
Andrea Callegari,1
Patrice Theulé,1
John S. Muenter,2
Roman N. Tolchenov,3
Nikalai F. Zobov,3*
Oleg L. Polyansky,3*
Jonathan Tennyson,3
Thomas R. Rizzo4
The intensity of water absorption in the region of the
solar spectrum plays a dominant role in atmospheric energy balance and
hence strongly influences climate. Significant controversy exists over
how to model this absorption accurately. We report dipole moment
measurements of highly vibrationally excited water, which provide
stringent tests of intensities determined by other means. Our
measurements and accompanying calculations suggest that the best
currently available potential and dipole surfaces do not accurately
model intensities in the optical spectrum of water.
1 Laboratoire de chimie physique
moléculaire (LCPM), École Polytechnique
Fédérale de Lausanne, 1015 Lausanne, Switzerland.
2 Department of Chemistry, University of Rochester,
Rochester, NY 14627, USA.
3 Department of Physics
and Astronomy, University College London, Gower Street, London WC1E
6BT, UK.
4 Laboratoire de chimie physique
moléculaire (LCPM), École Polytechnique
Fédérale de Lausanne, 1015 Lausanne, Switzerland.
*
Permanent address: Institute of Applied Physics, Russian Academy
of Sciences, Uljanov Street 46, Nizhinii Novgorod, Russia 603950.
To whom correspondence should be addressed. E-mail:
thomas.rizzo{at}epfl.ch
