A model of intermediate complexity based on quasi-equilibrium theory—a version of the Quasi-Equilibrium Tropical Circulation Model with a prognostic atmospheric boundary layer, as well as two free-tropospheric modes in momentum, and one each in moisture and temperature—is used in a zonally symmetric aquaplanet configuration to study the sensitivity of the Hadley circulation to the sea surface t...

The double-Intertropical Convergence Zone (ITCZ) problem, in which excessive precipitation is produced in the Southern Hemisphere tropics, which resembles a Southern Hemisphere counterpart to the strong Northern Hemisphere ITCZ, is perhaps the most significant and most persistent bias of global climate models. In this study, we look to the extratropics for possible causes of the double-ITCZ pro...

Article history: Received 25 June 2015 Received in revised form 22 January 2016 Accepted 1 February 2016 Available online 11 February 2016 In Central America, seasonal and interannual shifts in the position of the Intertropical Convergence Zone (ITCZ) control the hydrologic budget. To better understand long-term changes in regional ITCZ-driven precipitation we re-examined a coral δO record from...

The intertropical convergence zone (ITCZ) is displaced to the south edge of the eastern Pacific warm pool in boreal winter, instead of being collocated. A high-resolution regional climate model is used to investigate the mechanism for this displaced ITCZ. Under the observed sea surface temperature (SST) and lateral boundary forcing, the model reproduces the salient features of eastern Pacific c...

Abstract Stratospheric Aerosol Geoengineering (SAG) is one of the solar geoengineering approaches that have been proposed to offset some impacts anthropogenic climate change. Past studies shown SAG may adverse on global hydrological cycle. Using a model, we quantify sensitivity tropical monsoon precipitation meridional distribution volcanic sulfate aerosols prescribed in stratosphere terms chan...

We analyse changes in terrigenous sedimentation along the northwestern Australian margin to monitor latitudinal migration of Intertropical Convergence Zone (ITCZ) and shifting boundaries climatic belts during last four glacial cycles. integrate high-resolution X-ray fluorescence (XRF) scanning elemental records from Core SO257–18548 International Ocean Discovery Program Site U1482, situated sou...

Recent progress in satellite remote-sensing techniques for precipitation estimation, along with more accurate tropical rainfall measurements from the Tropical Rainfall Measuring Mission (TRMM) Microwave Imager (TMI) and precipitation radar (PR) instruments, have made it possible to monitor tropical rainfall diurnal patterns and their intensities from satellite information. One year (August 1998...

In this study, we use a sophisticated highresolution atmosphere-ocean coupled climate model, ECEarth, to investigate the effect of Mid-Holocene orbital forcing on summer monsoons on both hemispheres. During the Mid-Holocene (6 ka), there was more summer insolation on the Northern Hemisphere than today, which intensified the meridional temperature and pressure gradients. Over North Africa, monso...

Abstract North Atlantic sea surface temperatures (SSTs) underwent pronounced multidecadal variability during the twentieth and early twenty-first century. We examine impacts of this Multidecadal Variability (AMV), also referred to as Oscillation (AMO), on climate in an ensemble five coupled models at both low high spatial resolution. use a SST nudging scheme specified by Coupled Model Intercomp...

It is well known that the intertropical convergence zone (ITCZ) shifts in response to remote perturbations in the atmospheric energy balance, with shifts roughly in proportion to changes in the cross-equatorial atmospheric energy flux. However, atmospheric and oceanic energy fluxes in low latitudes are mechanically coupled, and the oceanic energy flux dominates the atmospheric energy flux. Here...