Temporal and spatial changes of primary productivity the sea of Marmara obtained by remote sensing

İkis, Didem
Temporal and spatial variations in the Sea of Marmara based on monthly averages of chlorophyll a, which is the major indicator of phytoplankton biomass and primary production, recorded by SeaWiFS and MODIS-Aqua sensors at nearly 100 stations have been analyzed for the period of 1997-2007. Majority of phytoplankton blooms occur during the winter and spring seasons, followed by a smaller secondary bloom during the fall season. The majority of high magnitude blooms occur at the Eastern part of the Sea which may be attributed to an increase in the amount of discharge of water contaminated with nutrients originating on land where the industries are located. The correlations between monthly averages of sea surface temperature (SST) and corresponding chlorophyll a values are statistically significant (inverse) at 1% level, where r= -0.53 and the equation of the fitted model is: Chlorophyll a = 7.09199 0.215402* SST This correlation is expected because a relative decrease in SST is an indicative of upwelling and vertical mixing which are the primary processes for the formation of phytoplankton blooms. We have also found that monthly averages of chlorophyll a recorded by SeaWiFS and MODIS-Aqua are nearly identical and either data set can be used in place of the other.


The hydrologie and isotopic data were analyzed for samples collected in 1989 and 1990 for the Guvenç basin of Ankara. Hydrograph components were evaluated for nine storm events. The average contribution of baseflow, interflow, and surface flow to the streamflow was 61,24, and 15%, respectively
The impact of hard data uncertainty in reservoirs modelling
Fadlelmula, M.m.; Akın, Serhat; Duzgun, H.s. (null; 2017-01-01)
Predicting and estimating real world conditions presents one of the major ways in which uncertainty is introduced to reservoir modelling, with errors often occurring due to the scarcity of subsurface geological information. The inherently random nature of physical phenomena is another source of uncertainty. While uncertainty due to physical phenomena cannot be reduced - because it is a state of nature - developing more accurate models and collecting additional data can help decrease estimation uncertainty. ...
Relative involvement of mantle and crustal components in the Agacoren granitoid (central Anatolia, Turkey): Estimates from trace element and Sr-isotope data
Güleç, Nilgün Türkan (1998-02-01)
Trace element contents, together with Sr-isotope ratios on a limited number of samples, are reported for the central part of the Agacoren granitoid in central Anatolia (Turkey), Trace element contents are depicted in terms of Ocean Ridge Granitoid (ORG)-normalized elemental patterns. The patterns display similarities to Volcanic Arc Granitoids (VAG) and/or Collision Granitoids (COLG), and are characterized by enrichment in Large Ion Lithophile (LIL) elements relative to High Field Strength (HFS) elements, n...
Seasonal and spatial variation of bacterial production and abundance in the northern Levantine Sea
YUCEL, N. (National Documentation Centre (EKT), 2017-3-13)
Spatial and temporal heterogeneity in bacterial production and abundance in relation to ambient bio-physicochemical parameters has been investigated in the Levantine Sea. Five stations with different trophic states in an area extending from highly eutrophic Mersin bay to the mesotrophic Rhodes gyre area including the oligotrophic offshore waters were sampled four times. Integrated bacterial production varied between 6.1 and 90.3 g C m(-2) d(-1) with higher rates occurring during September 2012 in offshore w...
Spatial and Temporal Variations of Inorganic and Organic Forms of Phosphorus in the Surface and Deep Waters of Erdemli Shelf Zone of Mersin Bay
DOĞAN SAĞLAMTİMUR, NESLİHAN; Tuğrul, Süleyman (2013-01-01)
The aim of this study was to understand spatial and temporal variations of inorganic and organic forms of phosphorus in the surface and deep waters of Erdemli shelf zone of the Mersin Bay. For this goal, timeseries hydrographical and phosphorus data were obtained monthly at the three selected stations between December 2001 and December 2003. The present results have shown that the concentrations of different fractions of total phosphorus displayed a decreasing trend from nearshore to shelfbreak zone of the ...
Citation Formats
D. İkis, “Temporal and spatial changes of primary productivity the sea of Marmara obtained by remote sensing,” M.S. - Master of Science, Middle East Technical University, 2007.