In this study, the monthly averaged daily mean temperature, relative humidity and surface pressure data obtained from European Centre for Medium-Range Weather Forecasts (ECMWF) during period of thirty eight (1979 – 2016) years were used to estimate variation geopotential scale heights Iseyin located in South Western region Nigeria. The variations with meteorological parameters investigated. res...

Atmospheric blocking events are persistent quasi-stationary geopotential height anomalies that divert the jet stream from its climatological path in mid- to high-latitudes. Previous studies have found different phases of El Niño–Southern Oscillation (ENSO) influence characteristics blocking, but none considered spatial diversity Niño. In this study, we examine Northern Hemisphere with respect “...

Stable oxygen isotopes measured in tree rings are useful for reconstructing climate variability and explaining changes physiological processes occurring forests, complementing other tree-ring parameters such as ring width. Here, we analyzed the relationships between different annually resolved δ18O records (δ18OTR) from white spruce (Picea glauca [Moench]Voss) trees located near Tungsten (North...

Abstract The International Height Reference System (IHRS) was defined by the Association of Geodesy in 2015. Since then, international geodetic community has been working on specification and establishment its realisation, Frame (IHRF). This frame will primarily be realised geopotential numbers (or physical heights) a sparse global reference network. In Sweden, only one such station is planned....

Abstract In this study, we evaluate the suitability of recent Earth Gravitational Models (EGMs) for realization International Height Reference System (IHRS) in Canada. Topographic gravity field models have been used to augment EGMs spatial resolution reaching 2 ′ (about 4 km), which is comparable regional geoid models. The advantages using an EGM over a approach IHRS are its uniform representat...

The effect of Arctic sea ice loss on the boreal winter regional trends wind speed and latitudinal position Northern Hemisphere subtropical jet stream (STJ) in 1980–2012 is investigated. Two sets global simulations with reduced extent are analyzed: that, south 70 N, use a climatological annual cycle surface temperature (SST) second set that uses full SST variability. Results have significant but...