Distributed measurement of humidity is a sought-after capability for various fields of application, especially in the civil engineering and structural health monitoring sectors. This article presents a method for distributed humidity sensing along polymethyl methacrylate (PMMA) polymer optical fibers (POFs) by analyzing wavelength-dependent Rayleigh backscattering and attenuation characteristic...

introduction the city population, in particular at the industrialized cities and centers of provinces, has increased dramatically in iran during recent decades. arak city is among of those industrialized cities as a centers of markazi province which has experienced a fast increase in population. this changes in population numbers tend to increase in consuming water resources as well as increasi...

to analysis the mechanisms of blocking high effects on heavy precipitations in northwest of iran, we selected a short period of heavy precipitation (25-28 october 2008). in this case, weather maps such as mean of sea level pressure, 850-hpa and 500-hpa geopotential height levels were assessed and analyzed for the whole period. the position and movement of the atmospheric systems such as cyclone...

introduction precipitation, an intrinsic part of nature, is essential not only for the survival of human but also for that of plants and animals. yet, this valuable natural phenomenon can also jeopardise human life, flora and fauna. torrential rains are sudden events that wreak havoc in iran and other parts of the world. in recent years, due to man's abuse of nature and disruption of environmen...

After the release of ERA-Interim reanalysis, many changes have been made to Integrated Forecasting System model and data-assimilation system, resulting in an improved ERA5. One allows version ERA5 represent moisture sensitivity deep convection more realistically than ERA-Interim. A previous modeling study showed that this change alone representation tropical atmosphere, e.g. variability precipi...

Abstract This study investigates the spatiotemporal characteristics of human-perceived temperature (HPT) data, which describe joint effects and humidity on human body, examines related large-scale atmospheric circulation patterns for summer season (July–August) in South Korea using trend composite analyses. The increasing HPT was stronger than that maximum, mean, minimum temperatures during 198...

Extraordinary floods are linked with heavy rainstorm systems. Among various systems, their synoptic features can be quite different. The understanding of extreme rainstorms by causative processes may assist in flood frequency analysis and support the evaluation any changes occurrence magnitudes. This paper aims to identify most dominant meteorological factors for rainstorms, using ERA5 hourly r...

Many impact studies require climate change information at a finer resolution than that provided by Global Climate Models (GCMs). In the last 10 years, downscaling techniques, both dynamical (i.e. Regional Climate Model) and statistical methods, have been developed to obtain fine resolution climate change scenarios. In this study, an automated statistical downscaling (ASD) regression-based appro...