This study investigates circulation types (CTs) in Africa, south of the equator, that are related to wet and dry conditions Western Cape, statistical relationship between selected CTs Southern Annular Mode (SAM), changes frequency occurrence SAM under ssp585 scenario. Obliquely rotated principal component analysis applied sea level pressure (SLP) was used classify equator. Three were found have...

The relationships between the natural variability and CO2-induced response over the Pacific region are investigated in terms of the spatial anomaly pattern of SST, sea level pressure and precipitation by a multi-model intercomparison analysis, based on the 18-model results contributing to the IPCC Fourth Assessment Report. The analysis indicates that the CO2-induced response pattern is related ...

We test the hypothesis that climate and environmental conditions are becoming favorable for dengue transmission in San Juan, Puerto Rico. Sea Level Pressure (SLP), Mean Sea Level (MSL), Wind, Sea Surface Temperature (SST), Air Surface Temperature (AST), Rainfall, and confirmed dengue cases were analyzed. We evaluated the dengue incidence and environmental data with Principal Component Analysis,...

[1] Along the central coast of Chile is typically equatorward, upwelling-favorable wind associated with the southeast Pacific anticyclone. A coastal low-level jet often develops, and its wind speed is mostly controlled by the meridional pressure gradient. While the low-level jet is a mesoscale feature forced by an interaction between synoptic conditions and coastal topography, regional sea leve...

[1] A link is found between the variability of Fram Strait sea ice export and the phase of zonal wave 1 in SLP for the period 1958– 1997. Previous studies have found that the link between ice export through Fram Strait and the NAO is inconsistent over time scales longer than the last two decades. Inconsistent and low correlations are also found between Fram Strait ice export and the AO index. T...

We investigate the effects of solar forcing on North Atlantic (NA) summer climate, in climate simulations with Earth System Models (ESMs), over preindustrial past millennium (AD 850–1849). use one simulation and a four-member ensemble performed MPI-ESM-P CESM-LME models, respectively, forced only by low-scaling variations Total Solar Irradiance (TSI). apply linear methods (correlation regressio...

The study of ocean bottom pressure (OBP) helps to understand the changes in sea level budget and deep circulation. In this study, characteristics mechanisms interannual OBP variability Southern Indian Ocean are examined using Gravity Recovery Climate Experiment (GRACE) satellite data from 2003 2016. Results show that there two energetic centers (50°–60°S, 40°–60°E 45°–60°S, 80°–120°E). magnitud...

An unprecedented strengthening of Pacific trade winds since the late 1990s (ref. 1) has caused widespread climate perturbations, including rapid sea-level rise in the western tropical Pacific2–5, strengthening of Indo-Pacific ocean currents6,7, and an increased uptake of heat in the equatorial Pacific thermocline1. The corresponding intensification of the atmospheric Walker circulation is also ...

abstract: identification of spatial-temporal anomalies sea level pressure in part of northern hemisphere was the main aim in this research. for this purpose six hourly data used from the to eastern longitude and to northern latitude. in this location, there are 825 pixels to geographical degree. therefore, database extent created. in this matrix, 825 are number of the pixels at that location an...

In this study, a synoptic climatological approach is employed to assess the relationship between the frequency of circulation patterns (CPs) and the latitude of mid-September sea ice minima in the western Arctic. Fifteen CPs are created via principal component analysis and cluster analysis from daily NCEP/NCAR reanalysis sea-level pressure (SLP) fields across a grid from 50 to 90◦N and 150◦E–10...