Rams R. Seth/ is a native ofNew Delhi, India. She did her undergradu· ate work at the University ofCalifornia, Berkeley In Political Science and City and Regional Planning and received a Master ofUrban Planning in 1993 from the University ofMichigan, spec/slizing in lntemstlonal Planning and Development. Both the absolute numbers and proportions of elderly persons are rapidly growing throughout...

The Atmosphere Special Issue entitled “Atmospheric and Ocean Optics: Atmospheric Physics II” comprises eight original papers [...]

AFFILIATIONS: STEVENS AND VAN ZANTEN—Department of Atmospheric Sciences, University of California, Los Angeles, Los Angeles, California; VALI—Department of Atmospheric Science, University of Wyoming, Laramie, Wyoming; COMSTOCK, WOOD, AND BRETHERTON—Department of Atmospheric Sciences, University of Washington, Seattle, Washington; VAN ZANTEN— Institute of Marine and Atmospheric Research Utrecht,...

We consider the problem of minimizing ∫ ` 0 √ ξ2 +K2(s) ds for a planar curve having fixed initial and final positions and directions. The total length ` is free. Here s is the variable of arclength parametrization, K(s) is the curvature of the curve and ξ > 0 a parameter. This problem comes from a model of geometry of vision due to Petitot, Citti and Sarti. We study existence of local and glob...

Available online 18 June 2013

Nitrous acid (HONO) is of particular importance in atmospheric chemistry; its photolysis significantly enhances photooxidation processes early in the morning or during wintertime, through the rapid production of OH radicals in the presence of long wavelength radiation, and in urban areas with low O3 levels. Previous studies reveal that neither direct HONO emissions from combustion sources nor h...

There are at least three distinct timescales that are relevant for the evolution of atmospheric convection. These are the timescale of the forcing mechanism, the timescale governing the response to a steady forcing and the timescale of the response to variations in the forcing. The last of these, tmem, is associated with convective lifecycles, which provide an element of memory in the system. A...