Investigation of 8-year-long composition Record in the Eastern Mediterranean Precipitation

Işıkdemir, Özlem
Measurement of chemical composition of precipitation is important both to understand acidification of terrestrial and aquatic ecosystems and neutralization process in the atmosphere. Such data are scarce in the Mediterranean region. In this study, chemical composition of daily, wet-only, 387 number of rain water samples collected between 1991 and 1999 were investigated to determine levels, temporal variation and long-term trends in concentrations of major ions and trace elements between 1991 and 1999. Samples had already been collected and some of the analysis had been completed. The anions SO42-, NO3- and Cl- were analyzed by HPLC coupled with UV-VIS detector, NH4+ was analyzed by colorimetry and H+ ion was analyzed by pH meter. The major ions and trace metals were analyzed by using Atomic Absorption Spectrometry (AAS) and Graphite Furnace Atomic Absorption Spectrometry (GFAAS). In this study complete data set were generated by analyzing samples that had not been previously analyzed for major ions and trace elements with Inductively Coupled Plasma with Optical Emission Spectrometry (ICP-OES). Statistical tools were used to determine the distribution of the pollutants. The rain water data tends to be log-normally distributed since data show large variations due to meteorological conditions, physical and chemical transformations and air mass transport patterns. The median pH of the rain water was found to be 5.29, which indicates that the rain water is not strongly acidic. This case is not a result of lacking of acidic compounds but rather indicates extended neutralization process in rain water. Eastern Mediterranean atmosphere is under the influence of three general source types: (1) anthropogenic sources, which are located to the north and northwest of the basin brings low pH values to the region (SO42-, NO3- ions); (2) a strong crustal source, which is dried and


Investigation of the impact of the nonlinear relations among soil moisture products over data fusion process
Afshar, Mehdi; Bulut, Burak; Yılmaz, Mustafa Tuğrul (2017-04-28)
Soil moisture is one of the terrestrial essential climate variables that has critical role in the water, energy, and carbon cycles. There are different ways available for the retrieval of this essential variable (e.g., remote sensing, hydrological models, insitu measurements, and etc.). However, the time series of these retrievals often contain systematic differences, which need to be removed via different rescaling approaches before these data sets could be used in data fusion type studies. In this study, ...
Investigation of Sea Surface Temperature (SST) Anomalies over Cyprus Area
Georgiou, Andreas; Akcit, Nuhcan (2016-04-08)
The temperature of the sea surface has been identified as an important parameter of the natural environment, governing processes that occur in the upper ocean. This paper focuses on the analysis of the Sea Surface Temperature (SST) anomalies at the greater area of Cyprus. For that, SST data derived from MODerate-resolution Imaging Spectroradiometer (MODIS) instrument on board both Aqua and Terra sun synchronous satellites were used. A four year period was chosen as a first approach to address and describe t...
On the production, elemental composition (C, N, P) and distribution of photosynthetic organic matter in the Southern Black Sea
Yilmaz, A; Tuğrul, Süleyman; Polat, Colpan; EDİGER, DİLEK; Coban, Yeşim; MORKOÇ, ENİS (1998-01-01)
Chemical oceanographic understanding of the southern Black Sea has been improved by recent measurements of the optical transparency, phytoplankton biomass (in terms of chlorophyll-a and particulate organic matter) and primary productivity. During the spring-autumn period of 1995-1996, light generally penetrated only into the upper 15-40 m, with an attenuation coefficient varying between 0.125 and 0.350 m(-1). The average chlorophyll-a (Chl-a) concentrations for the euphotic zone ranged from 0.1 to 1.5 mu g ...
Analysis and calculation of the magnetization, magnetic susceptibility and the specific heat close to phase transitions in heterometallics
Dugan, E. Kilit; Yurtseven, Hasan Hamit (Elsevier BV, 2019-10-01)
The temperature dependence of the magnetization for DMFeNi and DMFeCu is calculated by the molecular field theory and it is also analyzed as functions of temperature and the magnetic field by the power-law formulae close to the phase transitions in these compounds by using the observed data from the literature. From the analysis, values of the critical exponents beta (temperature-induced order parameter at H = 100 Oe) and delta (field-induced order parameter at T = 2 K) are deduced. Also, using the observed...
Ionic composition of rainwater on the Black Sea Coast of Turkey
Tuncer, Pınar; Tuncel, Süleyman Gürdal; Department of Environmental Engineering (2019)
Composition of rainwater is a measure of pollutant deposition to marine and terrestrial ecosystem. Soluble fraction of wet deposited pollutants are even more important because they are bioavailable to fish in the sea and plants on the land. In addition to their harmful effects on plant and animal life, inorganic ions, trace elements and organic compounds in rainwater can also be used as tracers of long-range transport to receptor. In this study, chemical composition of rainwater samples collected at Amasra ...
Citation Formats
Ö. Işıkdemir, “Investigation of 8-year-long composition Record in the Eastern Mediterranean Precipitation,” M.S. - Master of Science, Middle East Technical University, 2006.