The presence of a low- to mid-latitude interhemispheric hydrologic seesaw is apparent over orbital and glacial-interglacial timescales, but its existence over the most recent past remains unclear. Here we investigate, based on climate proxy reconstructions from both hemispheres, the inter-hemispherical phasing of the Intertropical Convergence Zone (ITCZ) and the low- to mid-latitude teleconnect...

This paper presents the Intertropical Convergence Zone (ITCZ) as possible source mechanism of medium-scale traveling ionospheric disturbances (MSTIDs) propagating to southeast direction over South American region. Using data collected by GNSS dual-frequency receivers network from January 2014 December 2019, detrended TEC maps were generated identify and characterize 144 MSTIDs southeastward low...

This paper reviews the observational and theoretical basis for the prediction of seasonal-to-interannual (S/I) climate variability in the Atlantic sector. The emphasis is on the large-scale picture rather than on regional details. The paper is divided into two main parts: a discussion of the predictability of the North Atlantic Oscillation (NAO)—the dominant pattern of variability in the North ...

vascular diseases of the brain are the second reason of the death and the first cause of morbidity and disability worldwide. in tropical areas stroke has some particular features related to the nature of torrid zones. there are some special causes of the stroke, mainly infectious, although some of them are non-infectious. the most important etiologies are malaria, tuberculosis, cysticercosis, s...

Abstract Since 2011, unprecedented pelagic sargassum seaweed blooms have occurred across the tropical North Atlantic, with severe socioeconomic impacts for coastal populations. To investigate role of physical drivers in post-2010 Central West Atlantic (CWA), conditions are examined wider using ocean and atmospheric re-analyses satellite-derived datasets. Of particular consequence growth drift p...

Daily surface wind variations over the equatorial eastern Pacific Ocean during summer 1992 are documented, using hourly observations from the tropical atmosphere ocean moored buoy array. Diurnal and semidiurnal variations are apparent in the zonal wind component, with peak-to-peak amplitudes of a few tenths of a meter per second. The phase of the semidiurnal cycle in zonal wind is approximately...

Fresh water hosing simulations, in which a fresh water flux is imposed in the North Atlantic to force fluctuations of the Atlantic Meridional Overturning Circulation, have been routinely performed, first to study the climatic signature of different states of this circulation, then, under present or future conditions, to investigate the potential impact of a partial melting of the Greenland ice ...

2 ABSTRACT Coupled general circulation model (GCM) simulations participating in the Coupled Model Intercomparison Project Phase 5 (CMIP5) are analyzed with respect to their performance in the equatorial Atlantic. In terms of the mean state, 29 out of 33 models examined continue to suffer from serious biases including an annual mean zonal equatorial SST gradient whose sign is opposite to observa...