Now showing items 51-55 of 55
Evolution of the cross-equatorial atmospheric boundary layer in the east Pacific: observations and models
The NCAR C-130 research aircraft flew eight missions observing the atmospheric boundary layer (ABL) along 95°W, 1°S--12°N. The positive air-sea temperature difference over the equatorial cold tongue results in a shallow stable layer with reduced surface winds. Stratocumulus clouds at the ABL top tend to clear over the cold ...
Factors influencing the diurnal temperature range in the contiguous United States
During the past several decades, much of the United States has experienced a warming, particularly at night, and a marked decrease in the diurnal temperature range (DTR). Observed variations in many variables have been cited as possible causes of the reported temperature trends. These include increasing cloudiness, rising ...
On the annual cycle over the atlantic sector: the relative role of land and ocean
This study investigates how local and remote forcings shape the annual cycle of surface temperature and precipitation in the tropical Atlantic ocean, Africa, and South America.We use an atmospheric general circulation model with prescribed SST or coupled to a slab ocean model, and prescribe insolation over land and SST---or, ...
Mesoscale variability and drizzle in southeast Pacific stratocumulus
Large regions of subtropical stratocumulus clouds are responsible for significant net cooling in the earth's radiative budget. Stratocumulus are maintained by a complex interaction of processes on small scales (turbulent eddies) and mesoscales (10-100 km) that are not currently well represented in climate models. In ...
An observational study of the tropical tropospheric circulation
This observational study focuses on four different aspects of the general circulation of the tropical troposphere: the seasonality of the mean meridional circulation (MMC), the zonal momentum balance of the tropical troposphere, the structure of the equatorial stationary waves and the variability of the equatorial stationary ...