Monthly and 3-hourly precipitation data from twentieth-century climate simulations by the newest generation of 18 coupled climate system models are analyzed and compared with available observations. The characteristics examined include the mean spatial patterns, intraseasonal-to-interannual and ENSO-related variability, convective versus stratiform precipitation ratio, precipitation frequency a...

Soon (2005) showed that the variable total solar irradiance (TSI) could explain, rather surprisingly, well over 75% of the variance for the decadally smoothed Arctic-wide surface air temperature over the past 130 years. The present paper provides additional empirical evidence for this physical connection, both through several newly published high-resolution paleo-proxy records and through robus...

Airborne Differential Absorption Lidar (DIAL) observations of tropospheric water vapour over Brazil and between Brazil and south Europe in March 2004 are compared to 1-hourly short-range forecasts of the European Centre for Medium Range Weather Forecasts (ECMWF). On three along-flight sections across the tropical and sub-tropical 5 Atlantic between 28◦ S and 37◦N humidity fields are observed wh...

OF DISSERTATION BIOPHYSICAL BEHAVIOR IN TROPICAL SOUTH AMERICA The concentration of CO2 in the atmosphere is rising, in response to human activities such as consumption of fossil fuel, cement production, and land cover change. This increase is mitigated by the fact that currently, approximately one-half of the CO2 of anthropogenic origin does not take up permanent residence in the atmosphere, b...

GPS/MET observations of the tropical atmosphere of the southern hemisphere (5S to 25S) during February 1997 are analysed, when a high amount of convective tropospheric water vapor is at these latitudes. Enhanced gravity wave activity of the lower stratosphere at h=22-28 km is associated to areas of increased tropospheric water vapor pressure at h=4-6 km, regarded as a measure of tropical convec...

Abstract. Changes in global-mean precipitation are strongly constrained by global radiative cooling, while regional rainfall changes less because energy can be transported. Absorbing and non-absorbing aerosols have different effects on both precipitation, due to the distinct energetics. This study analyses responses large perturbations black carbon (BC) sulfate (SUL) examining atmospheric budge...

Obliquity influences the latitudinal position of Intertropical Convergence Zone (ITCZ). However, specific forcing mechanism remains unclear due to scarcity long-term and high-resolution precipitation records from Indo-Pacific region. Here, we present a new, extended, (∼2 kyr) record covering past ∼410 kyr marine sedimentary sequence collected at southern margin ITCZ's displacement within By int...