Inferences of past climatic conditions from a sedimentary record from Big Lake, British Columbia, Canada, over the past 5,500 years show strong millennial-scale patterns, which oscillate between periods of wet and drier climatic conditions. Higher frequency decadal- to centennial-scale fluctuations also occur within the dominant millennial-scale patterns. These changes in climatic conditions ar...

East African coastal waters in the tropical western Indian Ocean experience strong seasonality which varies yearly, leading to establishment of a prominent interannual Dipole (IOD). This has significant influence on regional and global socio-economic, climatic human development. Sea surface temperature (SST) variability these its association with ocean–atmosphere feedbacks internal subsurface o...

My research is at the interface between applied mathematics and climate atmosphere ocean science. My primary applied mathematics research interests are in geometrical data analysis algorithms and statistical modeling of dynamical systems. These tools are applied in a range of applications in climate science, including intraseasonal oscillations of organized tropical convection and arctic sea-ic...

Evidence suggests that the year-class strength of salmon populations is related to decadal scale climatic/ocean fluctuations. The interactions have complex latitudinal patterns and appear to involve the major food web and current structures of the North Pacific. To understand the effect of climate on Columbia River salmon the North Pacific system must be considered. A brief review of the patter...

An important motivation for AMMA is the major regional scale and multi-decadal West African drought. It started at the end of the 1960’s, and was particularly severe in the seventies and eighties (Figure 1). It is indeed considered as the strongest observed event of rainfall variability at these time and space scales, and the actual mechanisms accounting for this drought are yet to be precisely...

weather condition is one of the much effective factors in the principle of architecture and urbanization. so in this research long-term trend of effective climate elements in architecture of darab city including mean of minimum temperature, temperature mean, mean of maximum temperature, minimum relative humidity, maximum relative humidity, relative humidity mean, wind speed and sun hours in mon...

Seafloor methane release due to the thermal dissociation of gas hydrates is pervasive across the continental margins of the Arctic Ocean. Furthermore, there is increasing awareness that shallow hydrate-related methane seeps have appeared due to enhanced warming of Arctic Ocean bottom water during the last century. Although it has been argued that a gas hydrate gun could trigger abrupt climate c...

In the light of rapidly diminishing sea ice cover in the Arctic during the present atmospheric warming, it is imperative to study the distribution of sea ice in the past in relation to rapid climate change. Here we focus on glacial millennial-scale climatic events (Dansgaard/Oeschger events) using the sea ice proxy IP25 in combination with phytoplankton proxy data and quantification of diatom s...

Top predators integrate resources over time and space, and depending on the particular species they represent, different components of the marine environment. The habitat utilization of top predators has been studied using electronic tags to follow their movements and foraging behavior. In addition, these tags provide information on the physical characteristics of the water column (temperature ...