The abrupt climate event Younger Dryas (YD) has been extensively studied; however, its structure is still poorly understood. Climate in northeastern Brazil very sensitive to the latitudinal position of intertropical convergence zone (ITCZ) associated with change Atlantic. Here, we report changes ITCZ within YD by using precise speleothem multiproxy records from Brazil. We provide evidence for a...

The intertropical convergence zone (ITCZ) is the rising branch of the global Hadley circulation and often considered as the climatic axis of symmetry. A full-physics atmospheric general circulation model is coupled with an intermediate ocean model to investigate the effect of ITCZ’s meridional configuration on the space-time structure of climate variability. In the control experiment where the ...

Rainfall is an important variable to be able monitor and forecast across Africa, due its impact on agriculture, food security, climate-related diseases public health. Numerical weather models (NWMs) are component of this work, their complete spatial coverage, high resolution ability into the future. In study, spatio-temporal skill short-term forecasts rainfall Africa from 2016 through 2018 eval...

Abstract. We examine the influence of increased resolution on four long-standing biases using five different climate models developed within PRIMAVERA project. The are warm eastern tropical oceans, double Intertropical Convergence Zone (ITCZ), Southern Ocean, and cold North Atlantic. Atmosphere increases from ?100–200 to ?25–50 km, ocean ?1? (eddy-parametrized) ?0.25? (eddy-present). For one mo...

[1] Here we present a survey of the spatial variability in different climate zones seen from AIRS data using the spectral EOF analysis. Over the tropical and subtropical oceans, the first principal component (PC1) is mostly due to the thermal contrast between surface and thick cold cloud tops. The second principal component (PC2) is mainly due to the spatial variation of the lower tropospheric ...

It remains challenging to quantify global cloud properties and uncertainties associated with their impacts on climate change because of our poor understanding of cloud three-dimensional (3-D) structures from observations and unrealistic characterization of 3-D cloud effects in global climate models (GCMs). In this study we find cloud 3-D effects can cause significant error in cloud ice and radi...

Coupled ocean atmosphere general circulation models (GCM) are typically coupled once every 24 h, excluding the diurnal cycle from the upper ocean. Previous studies attempting to examine the role of the diurnal cycle of the upper ocean and particularly of diurnal SST variability have used models unable to resolve the processes of interest. In part 1 of this study a high vertical resolution ocean...

Abstract. Using the Max Planck Institute Grand Ensemble (MPI-GE) with 200 members for historical simulation (1850–2005), we investigate impact of spatial distribution volcanic aerosols on El Niño–Southern Oscillation (ENSO) response. In particular, select three eruptions (El Chichón, Agung and Pinatubo) in which aerosol is respectively confined to Northern Hemisphere, Southern Hemisphere or equ...

With the unprecedented rate of global warming in recent decades, whether or not anthropogenic climate change is irreversible an important question. Based on idealized CO2 ramp-up until 1,468 ppm and symmetric ramp-down model experiments, here we show that intertropical convergence zone (ITCZ) does respond linearly to forcing, but exhibits strong hysteresis behaviour. While location ITCZ changes...