U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject Turkey (country) Remove constraint Subject: Turkey (country) Subject gravity Remove constraint Subject: gravity Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
Start Over

Search

18  Search Results

1 - 18 of 18
Number of results to display per page

Search Results

1. Giant slope scars and mass transport deposits across the Rhodes Basin, eastern Mediterranean: Depositional and tectonic processes

Author:
A.E. Aksu; J. Hall; C. Yaltırak
Source:
Sedimentary geology 2021 v.424 pp. 105979
ISSN:
0037-0738
Subject:
Pliocene epoch; Turkey (country); basins; bedrock; geophysics; gravity; mass transfer; sediments; tectonics; turbidity
Abstract:
... High-resolution multichannel seismic reflection profiles and multibeam mosaic maps of the seafloor are used to document the presence of two prominent regions representing major sediment failure(s) and the subsequent gravity-driven mass transport across the southwestern continental margin of Anatolia. These regions are characterized by very sugged morphology (referred to as Scars 1 and 2), where th ...
DOI:
10.1016/j.sedgeo.2021.105979

2. Land deformation and sinkhole occurrence in response to the fluctuations of groundwater storage: an integrated assessment of GRACE gravity measurements, ICESat/ICESat-2 altimetry data, and hydrologic models

Author:
Behnam Khorrami; Fetullah Arik; Orhan Gunduz
Source:
GIScience & remote sensing 2021 v.58 no.8 pp. 1518-1542
ISSN:
1943-7226
Subject:
Turkey (country); altimetry; basins; climate; decision making; deformation; evolution; gravity; groundwater; groundwater extraction; ice; satellites; socioeconomics; water shortages; water storage
Abstract:
... Uncontrolled extraction of water from groundwater aquifers causes groundwater depletion, which in turn triggers the formation of sinkholes in many parts of the world. Monitoring and detection of these geomorphologic features are of utmost importance and priority for the decision-makers to minimize significant environmental as well as socio-economic implications of land deformation. In this study, ...
DOI:
10.1080/15481603.2021.2000349

3. An Assessment of the GOCE High-Level Processing Facility (HPF) Released Global Geopotential Models with Regional Test Results in Turkey

Author:
Bihter Erol; Mustafa Serkan Işık; Serdar Erol
Source:
Remote Sensing 2020 v.12 no.3 pp. -
ISSN:
2072-4292
Subject:
geodesy; geophysics; global positioning systems; gravity; models; remote sensing; satellites; spectral analysis; statistical analysis; Turkey (country)
Abstract:
... The launch of dedicated satellite missions at the beginning of the 2000s led to significant improvement in the determination of Earth gravity field models. As a consequence of this progress, both the accuracies and the spatial resolutions of the global geopotential models increased. However, the spectral behaviors and the accuracies of the released models vary mainly depending on their computation ...
DOI:
10.3390/rs12030586

4. Morphology of coast and textural characteristics of coastal sediments (NE Gökova Graben, SW Turkey)

Author:
Murat Gül; Özlem Yılmaz; Özer Zeybek
Source:
Journal of coastal conservation 2019 v.23 no.2 pp. 417-434
ISSN:
1400-0350
Subject:
X-ray fluorescence spectroscopy; beaches; coastal sediments; coasts; digital elevation models; global warming; gravity; human settlements; risk; rivers; rocks; sea level; staining; streams; summer; tourism; Turkey (country)
Abstract:
... This study examines the morphology, lithological characteristic and controlling factors of coastal sediments in the northeast Gökova Graben (southwest Turkey). The northeast Gökova Graben is located in a region with several human settlements and tourism activities, in the summer. The analysis used in the study is field observation, Digital Elevation Model (DEM) analysis, 18 sieve (including statis ...
DOI:
10.1007/s11852-018-0672-3

5. Organized patches of bioherm growth where the Strait of Dardanelles enters the Marmara Sea, Turkey

Author:
A.E. Aksu; R.N. Hiscott; V.E. Kostylev; C. Yaltırak
Source:
Palaeogeography, palaeoclimatology, palaeoecology 2018 v.490 pp. 325-346
ISSN:
0031-0182
Subject:
Modiolus; Mytilus; Rhodophyta; geometry; gravity; growth and development; salinity; shell (molluscs); statistics; Marmara Sea; Turkey (country)
Abstract:
... High-resolution multibeam mosaics show that the seafloor across the southwestern Marmara Sea is host to remarkably organized near-circular bioherm mounds, which commonly are arranged into large, tightly packed clusters. Grab samples and gravity cores reveal that the bioherms are predominantly composed of very fine-grained, calcareous, silty mud with abundant bioclasts, including centimetre-scale m ...
DOI:
10.1016/j.palaeo.2017.11.010

6. Energy Input-Output Analysis in Organic Mulberry (Morus spp.) Production in Turkey: a Case Study Adiyaman-Tut Region

Author:
Osman Gokdogan; Halil Ibrahim Oguz; Mehmet Firat Baran
Source:
Erwerbs-Obstbau 2017 v.59 no.4 pp. 325-330
ISSN:
0014-0309
Subject:
animal manures; case studies; crop yield; diesel fuel; energy; gravity; humans; input output analysis; labor; mulberries; organic fertilizers; organic foods; specific energy; sprinkler irrigation; transportation; Turkey (country)
Abstract:
... The goal of this study is to do the energy input-output analysis of organic mulberry. This study was conducted at the organic mulberry producing facilities during the 2015–2016 production seasons in Adiyaman-Tut region of Turkey. The agricultural input energies and output energies used in organic mulberry production were computed to determine the energy input-output analysis. According to the rese ...
DOI:
10.1007/s10341-017-0333-y

7. Moho depth and crustal thinning in the Marmara Sea region from gravity data inversion

Author:
J. Kende; P. Henry; G. Bayrakci; M. S. Özeren; C. Grall
Source:
Journal of geophysical research 2017 v.122 no.2 pp. 1381-1401
ISSN:
2169-9313
Subject:
Pliocene epoch; Turkey (country); basins; geophysics; gravity; models; research; sediments; tectonics; topography; wavelengths; Marmara Sea
Abstract:
... The free‐air gravity in the Marmara Sea reveals that the low density of sedimentary basins is partly compensated in the lower crust. We compiled geophysical upper crust studies to determine the sediment basin geometries in and around the Marmara Sea and corrected the gravity signal from this upper crust geology with the Parker method. Then, assuming long wavelength anomalies in the residual gravit ...
DOI:
10.1002/2015JB012735

8. An evaluation of farmers’ willingness to pay for efficient irrigation for sustainable usage of resources: the GAP-Harran Plain case, Turkey

Author:
Mustafa Hakki Aydogdu; Abdulbaki Bilgic
Source:
Journal of integrative environmental sciences 2016 v.13 no.2-4 pp. 175-186
ISSN:
1943-8168
Subject:
cotton; cropping systems; elementary schools; farmers; financial economics; gravity; income; irrigation; natural resources; regression analysis; wheat; willingness to pay; Turkey (country)
Abstract:
... We evaluated farmers’ willingness to pay (WTP) for efficient irrigation and improved water productivity with the economic benefits of sustainable use of resources in the long-run, while reducing irrigation-related problems in the GAP-Harran Plain, Turkey. The data come from a sample of 21,094 farmers; 461 of them were chosen via simple random sampling method and interviewed face to face. The Tobit ...
DOI:
10.1080/1943815X.2016.1241808

9. A study on variation in position of an Indian station due to solid earth tides

Author:
JAYANTA KUMAR GHOSH; SHRAY PATHAK
Source:
Journal of earth system science 2015 v.124 no.3 pp. 603-612
ISSN:
0253-4126
Subject:
geodesy; gravity; latitude; longitude; periodicity; temporal variation; tides; time series analysis; China; India; Turkey (country)
Abstract:
... In many geodetic analyses, it is important to consider the effect of earth tide on the instantaneous position of a station and its subsequent influence on the computation and interpretation of time series of coordinates as well as related data products. The tidal effect and temporal variations in the position of the IGS (International Global Navigational Satellite Systems [GNSS] Service) stations ...
DOI:
10.1007/s12040-015-0554-0

10. Linking slab break-off, Hellenic trench retreat, and uplift of the Central and Eastern Anatolian plateaus

Author:
T.F. Schildgen; C. Yıldırım; D. Cosentino; M.R. Strecker
Source:
Earth-science reviews 2014 v.128 pp. 147-168
ISSN:
0012-8252
Subject:
Miocene epoch; Pliocene epoch; deformation; geophysics; gravity; models; plateaus; prediction; seamounts; surveys; tomography; Cyprus; Eurasia; Turkey (country)
Abstract:
... The Central and Eastern Anatolian plateaus are integral parts of the world's third largest orogenic plateau. In the past decade, geophysical surveys have provided insights into the crust, lithosphere, and mantle beneath Eastern Anatolia. These observations are now accompanied by recent surveys in Central Anatolia and new data constraining the timing and magnitude of uplift along its northern and s ...
DOI:
10.1016/j.earscirev.2013.11.006

11. Moving toward the EU or the Middle East? An assessment of alternative Turkish foreign policies utilizing the GTAP framework

Author:
Tanja Engelbert; Beyhan Bektasoglu; Martina Brockmeier
Source:
Food policy 2014 v.47 pp. 46-61
ISSN:
0306-9192
Subject:
European Union; databases; edge effects; free trade; gravity; imports; models; tariffs; Middle East; Turkey (country)
Abstract:
... This paper assesses the new orientation in Turkish foreign policy towards the Arab world by analyzing the potential impact of Turkey’s membership in either the European Union (EU) or the Greater Arab Free Trade Area (GAFTA). We utilize the most recent version of the Global Trade Analysis Project (GTAP) database, its global Computable General Equilibrium (CGE) model, and the gravity border effect a ...
DOI:
10.1016/j.foodpol.2014.04.004

12. Clay mineral distribution in last Glacial-Holocene sediment cores from the eastern Marmara Sea (Çınarcık Basin–İzmit Gulf Transition), NW-Turkey: Multisources and transport paths in a two-way flow system

Author:
Mustafa Ergin; Emel Bayhan; Abidin Temel
Source:
Quaternary international 2012 v.261 no. pp. 53-74
ISSN:
1040-6182
Subject:
basins; calcite; carbon; chlorites; clay; clay fraction; feldspar; gravel; gravity; illite; kaolinite; provenance; quartz; radiocarbon dating; sand; sea level; seawater; silt; watersheds; Aegean Sea; Black Sea; Marmara Sea; Turkey (country)
Abstract:
... The regional variations in grain size, XRD-bulk and clay mineral distribution in 97 sediment samples from 6 gravity cores obtained from 20 to 300 m water depths have been investigated to reveal source and transportation patterns as well as the effects of climatic and sea-level changes during the last 25,000 ¹⁴C BP in the eastern Marmara Sea (EMS), NW Turkey. The major proportions of sediments in t ...
DOI:
10.1016/j.quaint.2011.11.013

13. Detrital supply from subduction/accretion complexes to the Eocene–Oligocene post-collisional southern Thrace Basin (NW Turkey and NE Greece)

Author:
Azzurra d'Atri; Gian Gaspare Zuffa; William Cavazza; Aral I. Okay; Gianfranco Di Vincenzo
Source:
Sedimentary geology 2012 v.243-244 no. pp. 117-129
ISSN:
0037-0738
Subject:
basins; carbonates; gravity; provenance; sandstone; volcanic activity; Greece; Turkey (country)
Abstract:
... The Thrace Basin is a large, mostly Eocene–Oligocene post-collisional sedimentary basin which developed following the closure of the Vardar–İzmir–Ankara oceanic domain (latest Cretaceous–Paleocene). Sandstone petrologic data (framework and heavy-mineral analyses) and the synthesis of preexisting and new sedimentological observations along representative stratigraphic sections show that the basin f ...
DOI:
10.1016/j.sedgeo.2011.10.008

14. Holocene sedimentation in the tectonically active Tekirdağ Basin, western Marmara Sea, Turkey

Author:
Füsun Yiğit Faridfathi; Mustafa Ergin
Source:
Quaternary international 2012 v.261 no. pp. 75-90
ISSN:
1040-6182
Subject:
basins; calcium carbonate; carbon; clay; earthquakes; floods; gravel; gravity; marine sediments; mass movement; pollution load; rivers; sand; sediment deposition; sediment yield; silt; tectonics; topographic slope; Marmara Sea; Turkey (country)
Abstract:
... The effects of various depositional conditions and active tectonics on the late Holocene sedimentation in the Tekirdağ Basin, west of the Marmara Sea were investigated in 11 gravity cores and on 3 seismic profiles, representing shelf to slope to deep-basin floor environments. Except for the two coarser-grained (avg. 60% sand and gravel) and calcareous (avg. 25% CaCO₃) shelf cores, sediments in the ...
DOI:
10.1016/j.quaint.2011.11.014

15. Spectral evaluation of Earth geopotential models and an experiment on its regional improvement for geoid modelling

Author:
B EROL
Source:
Journal of earth system science 2012 v.121 no.3 pp. 823-835
ISSN:
0253-4126
Subject:
monitoring; Earth system science; models; gravity; spectral analysis; case studies; algorithms; satellites; Turkey (country)
Abstract:
... As the number of Earth geopotential models (EGM) grows with the increasing number of data collected by dedicated satellite gravity missions, CHAMP, GRACE and GOCE, measuring the differences among the models and monitoring the improvements in gravity field recovery are required. This study assesses the performance of recent EGMs derived from CHAMP, GRACE, and other data in comparison to the earlier ...
DOI:
10.1007/s12040-012-0190-x

16. A study on construction costs per unit area of irrigation projects

Author:
Cengiz Koç
Source:
Irrigation and drainage systems 2011 v.25 no.4 pp. 255-263
ISSN:
0168-6291
Subject:
basins; case studies; gravity; irrigation management; pipes; pumps; research projects; water supply; Turkey (country)
Abstract:
... The cost constructing for irrigation is often given in $/ha. In deciding whether a project is worth undertaking, it is important to weigh the anticipated benefits against the expected costs. In this study, unit area construction costs based on the way of project water supply (gravity, pump) and scheme type (classic canal, flume, pipe) were calculated for the 211 irrigation projects operated and co ...
DOI:
10.1007/s10795-011-9120-3

17. Indoor and outdoor airborne bacteria in child day-care centers in Edirne City (Turkey), seasonal distribution and influence of meteorological factors

Author:
Aydogdu, Halide; Asan, Ahmet; Tatman Otkun, Muserref
Source:
Environmental monitoring and assessment 2010 v.164 no.1-4 pp. 53-66
ISSN:
0167-6369
Subject:
Corynebacterium; Gram-negative bacteria; Gram-positive bacteria; Micrococcus; Staphylococcus; Streptococcus; agar; air; airborne microorganisms; blood; children; day care centers; gravity; plate count; rain; relative humidity; sheep; Turkey (country)
Abstract:
... This paper presents information about airborne mesophilic bacteria in the indoor and outdoor air of child day-care centers (CDCCs) in the city of Edirne, Turkey. Air samples were collected using the Petri plate gravitational settling method from the indoor and outdoor air of CDCCs. Counts of airborne bacteria were measured as colony forming units (CFU) collected by gravity onto Brain Heart Infusio ...
DOI:
10.1007/s10661-009-0874-0
PubMed:
19404760

18. Accuracy using xylometry of log volume estimates for two tree species in Turkey

Author:
Özçelik, Ramazan; Wiant, Harry V. Jr.; Brooks, John R.
Source:
Scandinavian journal of forest research 2008 v.23 no.3 pp. 272-277
ISSN:
0282-7581
Subject:
Abies; Pinus brutia; accuracy; gravity; prediction; tree and stand measurements; trees; volume; Turkey (country)
Abstract:
... Water displacement (xylometry) was used to determine true volumes of 28 logs from Cilicica fir (Abies cilicica Carr.) and Brutian pine (Pinus brutia Ten.) trees ranging from 15 to 52 cm in diameter at breast height. Three methods were used with xylometry, measuring the increase in water level, the increase in weight of the xylometer or the decrease in weight of the object, and converting weight ch ...
DOI:
10.1080/02827580801995323