High aerosol levels pose severe air pollution and climate change challenges in Iran. Although regional optical depth (AOD) trends have been analyzed during the dusty season over Iran, specific factors that are driving spatio-temporal variations winter AOD influence of meteorological dynamics on remain unclear. This study analyzes long-term Iran period 2000–2020 using updated Modern-Era Retrospe...

This paper proposes a joint analysis of variations global sea-level pressure (SLP) and Earth’s rotation (RP), expressed as the coordinates pole (m1, m2) length day (lod). We retain iterative singular spectrum (iSSA) main tool to extract trend, periods, quasi periods in data time series. SLP components are weak seven quasi-periodic or periodic (?130, 90, 50, 22, 15, 4, 1.8 years), an annual cycl...

Based on the Australian Bureau of Meteorology (BoM) El Niño alert system, this study investigates atmospheric and oceanic conditions during developing years between 1982 2016. It is found that there a 2–5-month (subseasonal-to-seasonal) lag to establish steady low-level (or Southern Oscillation Index, SOI) response than Niño-pattern Sea Surface Temperature Anomaly (SSTA), which defined as criti...

We investigated the effects of large-scale orography on the tropical coupled atmosphere-ocean system over the Indian and Pacific Oceans in northern summer, using the Meteorological Research Institute coupled atmosphere-ocean General Circulation Model (GCM). Six different experiments were conducted with mountain heights of 100%, 80%, 60%, 40%, 20%, and 0% of the standard mountain height. The res...

abstract this research attempts to investigate the role of the blocking systems in surface cyclogenesis over eastern mediterranean sea; but particular attention is focused on the flood of iran during march 2000 over western states of iran as: hamadan, ilam, lorestan, kermanshah, kurdestan, zanjan, ghazvin.the data used for this research includes upper level and mean sea level pressure charts ev...

Following a brief presentation of marine catch trends in Southeast Asia, some biological peculiarities of the stocks upon which these fisheries rely are discussed. Two empirical loglinear models are presented allowing rough estimation of potential yield of small pelagic fishes fish from primary production, and of demersal fish from mean water depth and primary production. These models are appli...

The development of the Indian Ocean basin (IOB) mode and its change under global warming are investigated using a pair of integrations with the Geophysical Fluid Dynamics Laboratory Climate Model version 2.1 (CM2.1). In the simulation under constant climate forcing, the El Niño–induced warming over the tropical Indian Ocean (TIO) and its capacitor effect on summer northwest Pacific climate are ...

A statistical downscaling approach is applied to the output of five different global climate model simulations driven by 21 century future scenarios of greenhouse gas concentrations. The contribution of sea-level pressure and precipitation changes to regional future winter sea-level changes is estimated for four Baltic sea-level stations by establishing statistical relationships between sea lev...

We study the forced response of teleconnection between El Niño–Southern Oscillation (ENSO) and Indian summer monsoon (IM) in Max Planck Institute Grand Ensemble, a set Earth system ensemble simulations under historical Representative Concentration Pathway (RCP) forcing. The teleconnection, or characteristic it, is defined as time dependence correlation coefficient evaluated over ensemble. consi...