Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Microplastics (20)
- Climate change (15)
- Chemical (11)
- Environmental Monitoring (11)
- Metals (11)
-
- Water Pollutants (11)
- Agriculture (8)
- Lead (8)
- Sea ice (8)
- Accumulation (7)
- Fibres (7)
- Humans (7)
- Adsorption (6)
- Biogeochemistry (6)
- Heavy metals (6)
- International Ocean Discovery Program (6)
- Land degradation (6)
- Rivers (6)
- Seawater (6)
- Trace metals (6)
- XRF (6)
- Arctic (5)
- Community resilience (5)
- Expedition 399 (5)
- Fragments (5)
- Holocene (5)
- IODP (5)
- Microfibres (5)
- Modelling (5)
- Plastics (5)
- Publication Year
- File Type
Articles 1381 - 1410 of 1481
Full-Text Articles in Entire DC Network
Development Of A Chemical Source Apportionment Decision Support Framework For Catchment Management, Sdw Comber, R Smith, P Daldorph, Et Al
Development Of A Chemical Source Apportionment Decision Support Framework For Catchment Management, Sdw Comber, R Smith, P Daldorph, Et Al
School of Geography, Earth and Environmental Sciences
EU legislation, including the Water Framework Directive, has led to the application of increasingly stringent quality standards for a wide range of chemical contaminants in surface waters. This has raised the question of how to determine and to quantify the sources of such substances so that measures can be taken to address breaches of these quality standards using the polluter pays principle. Contaminants enter surface waters via a number of diffuse and point sources. Decision support tools are required to assess the relative magnitudes of these sources and to estimate the impacts of any programmes of measures. This work describes …
Development Of A Chemical Source Apportionment Decision Support Framework For Catchment Management., Sean D.W. Comber, Russell Smith, Peter Daldorph, Michael J. Gardner, Carlos Constantino, Brian Ellor
Development Of A Chemical Source Apportionment Decision Support Framework For Catchment Management., Sean D.W. Comber, Russell Smith, Peter Daldorph, Michael J. Gardner, Carlos Constantino, Brian Ellor
School of Geography, Earth and Environmental Sciences
EU legislation, including the Water Framework Directive, has led to the application of increasingly stringent quality standards for a wide range of chemical contaminants in surface waters. This has raised the question of how to determine and to quantify the sources of such substances so that measures can be taken to address breaches of these quality standards using the polluter pays principle. Contaminants enter surface waters via a number of diffuse and point sources. Decision support tools are required to assess the relative magnitudes of these sources and to estimate the impacts of any programmes of measures. This work describes …
Benthic Foraminifera Show Some Resilience To Ocean Acidification In The Northern Gulf Of California, Mexico., L. R. Pettit, M. B. Hart, A. N. Medina-Sánchez, C. W. Smart, R. Rodolfo-Metalpa, J. M. Hall-Spencer, R. M. Prol-Ledesma
Benthic Foraminifera Show Some Resilience To Ocean Acidification In The Northern Gulf Of California, Mexico., L. R. Pettit, M. B. Hart, A. N. Medina-Sánchez, C. W. Smart, R. Rodolfo-Metalpa, J. M. Hall-Spencer, R. M. Prol-Ledesma
School of Geography, Earth and Environmental Sciences
Extensive CO2 vents have been discovered in the Wagner Basin, northern Gulf of California, where they create large areas with lowered seawater pH. Such areas are suitable for investigations of long-term biological effects of ocean acidification and effects of CO2 leakage from subsea carbon capture storage. Here, we show responses of benthic foraminifera to seawater pH gradients at 74-207m water depth. Living (rose Bengal stained) benthic foraminifera included Nonionella basispinata, Epistominella bradyana and Bulimina marginata. Studies on foraminifera at CO2 vents in the Mediterranean and off Papua New Guinea have shown dramatic long-term effects of acidified seawater. We found living …
Influence Of Sediment Redox Conditions On Uranium Mobilisation During Saline Intrusion, Jane Eagling, Paul J. Worsfold, William H. Blake, Miranda J. Keith-Roach
Influence Of Sediment Redox Conditions On Uranium Mobilisation During Saline Intrusion, Jane Eagling, Paul J. Worsfold, William H. Blake, Miranda J. Keith-Roach
School of Geography, Earth and Environmental Sciences
No abstract provided.
Assessing The Exposure Risk And Impacts Of Pharmaceuticals In The Environment On Individuals And Ecosystems, Ke Arnold, Aba Boxall, Ar Brown, Rj Cuthbert, S Gaw, Th Hutchinson, S Jobling, Jc Madden, Cd Metcalfe, V Naidoo, Rf Shore, Je Smits, Ma Taggart, Hm Thompson
Assessing The Exposure Risk And Impacts Of Pharmaceuticals In The Environment On Individuals And Ecosystems, Ke Arnold, Aba Boxall, Ar Brown, Rj Cuthbert, S Gaw, Th Hutchinson, S Jobling, Jc Madden, Cd Metcalfe, V Naidoo, Rf Shore, Je Smits, Ma Taggart, Hm Thompson
School of Geography, Earth and Environmental Sciences
The use of human and veterinary pharmaceuticals is increasing. Over the past decade, there has been a proliferation of research into potential environmental impacts of pharmaceuticals in the environment. A Royal Society-supported seminar brought together experts from diverse scientific fields to discuss the risks posed by pharmaceuticals to wildlife. Recent analytical advances have revealed that pharmaceuticals are entering habitats via water, sewage, manure and animal carcases, and dispersing through food chains. Pharmaceuticals are designed to alter physiology at low doses and so can be particularly potent contaminants. The near extinction of Asian vultures following exposure to diclofenac is the key …
Recognizing Detachment-Mode Seafloor Spreading In The Deep Geological Past., Marco Maffione, Antony Morris, Mark W. Anderson
Recognizing Detachment-Mode Seafloor Spreading In The Deep Geological Past., Marco Maffione, Antony Morris, Mark W. Anderson
School of Geography, Earth and Environmental Sciences
Large-offset oceanic detachment faults are a characteristic of slow- and ultraslow-spreading ridges, leading to the formation of oceanic core complexes (OCCs) that expose upper mantle and lower crustal rocks on the seafloor. The lithospheric extension accommodated by these structures is now recognized as a fundamentally distinct “detachment-mode” of seafloor spreading compared to classical magmatic accretion. Here we demonstrate a paleomagnetic methodology that allows unequivocal recognition of detachment-mode seafloor spreading in ancient ophiolites and apply this to a potential Jurassic detachment fault system in the Mirdita ophiolite (Albania). We show that footwall and hanging wall blocks either side of an inferred …
Sowfia Project - Work Package 4 Interim Report, T Simas, D Magagna, I Bailey, D Conley, D Greaves, J O’Callaghan, D Marina, J-B Saulnier, J Sundberg, C Embling
Sowfia Project - Work Package 4 Interim Report, T Simas, D Magagna, I Bailey, D Conley, D Greaves, J O’Callaghan, D Marina, J-B Saulnier, J Sundberg, C Embling
School of Geography, Earth and Environmental Sciences
No abstract provided.
Six Decades Of Total Factor Productivity Change And Sources Of Growth In Bangladesh Agriculture (1948–2008), S Rahman, R Salim
Six Decades Of Total Factor Productivity Change And Sources Of Growth In Bangladesh Agriculture (1948–2008), S Rahman, R Salim
School of Geography, Earth and Environmental Sciences
This study applies the Färe–Primont index to calculate total factor productivity (TFP) indices for agriculture in 17 regions of Bangladesh covering a 61-year period (1948–2008). It decomposes the TFP index into six finer components (technical change, technical-, scale- and mix-efficiency changes, residual scale- and residual mix-efficiency changes). Results reveal that TFP grew at an average rate of 0.57% p.a. led by the Chittagong, Rajshahi, Rangpur, Dinajpur and Noakhali regions. TFP growth is largely powered by technological progress estimated at 0.74% p.a. Technical efficiency improvement is negligible (0.01% p.a.) due to stagnant efficiency in most of the regions. Decline in scale …
Elucidating The Structural Properties That Influence The Persistence Of Pcbs In Humans Using The National Health And Nutrition Examination Survey (Nhanes) Dataset., David Megson, Gwen O'Sullivan, Sean Comber, Paul J. Worsfold, Maeve C. Lohan, Melanie R. Edwards, Walter J. Shields, Courtney D. Sandau, Donald G. Patterson
Elucidating The Structural Properties That Influence The Persistence Of Pcbs In Humans Using The National Health And Nutrition Examination Survey (Nhanes) Dataset., David Megson, Gwen O'Sullivan, Sean Comber, Paul J. Worsfold, Maeve C. Lohan, Melanie R. Edwards, Walter J. Shields, Courtney D. Sandau, Donald G. Patterson
School of Geography, Earth and Environmental Sciences
In human exposure studies involving Polychlorinated Biphenyls (PCBs), it is useful to establish when an individual was potentially exposed. Age dating PCB exposure is complex but assessments can be made because different PCB congeners have different residence times in the human body. The less chlorinated congeners generally tend to have shorter residence times because they are biotransformed and eliminated faster than more chlorinated congeners. Therefore, the presence of high proportions of less chlorinated congeners is often indicative of recent exposure. The 2003-04 National Health and Nutrition Examination Survey (NHANES) dataset contains results for the concentration of 37 PCBs in a …
Sowfia Project - Work Package 2 Final Report, J O’Callaghan, Am O’Hagan, B Holmes, Arjona E Muñoz, Olivares C Huertas, D Magagna, I Bailey, D Greaves, C Embling, M Witt, B Godley, T Simas, Enciso Y Torre, D Marina
Sowfia Project - Work Package 2 Final Report, J O’Callaghan, Am O’Hagan, B Holmes, Arjona E Muñoz, Olivares C Huertas, D Magagna, I Bailey, D Greaves, C Embling, M Witt, B Godley, T Simas, Enciso Y Torre, D Marina
School of Geography, Earth and Environmental Sciences
No abstract provided.
Isotopic Evidence For Long Term Warmth In The Mesozoic., Gregory D. Price, Richard J. Twitchett, James R. Wheeley, Giuseppe Buono
Isotopic Evidence For Long Term Warmth In The Mesozoic., Gregory D. Price, Richard J. Twitchett, James R. Wheeley, Giuseppe Buono
School of Geography, Earth and Environmental Sciences
Atmospheric CO2 concentrations appear to have been considerably higher than modern levels during much of the Phanerozoic and it has hence been proposed that surface temperatures were also higher. Some studies have, however, suggested that Earth's temperature (estimated from the isotopic composition of fossil shells) may have been independent of variations in atmospheric CO2 (e.g. in the Jurassic and Cretaceous). If large changes in atmospheric CO2 did not produce the expected climate responses in the past, predictions of future climate and the case for reducing current fossil-fuel emissions are potentially undermined. Here we evaluate the dataset upon which the Jurassic …
The Impact Of Global Warming And Anoxia On Marine Benthic Community Dynamics: An Example From The Toarcian (Early Jurassic)., S Danise, Rj Twitchett, Ct Little, Me Clémence
The Impact Of Global Warming And Anoxia On Marine Benthic Community Dynamics: An Example From The Toarcian (Early Jurassic)., S Danise, Rj Twitchett, Ct Little, Me Clémence
School of Geography, Earth and Environmental Sciences
The Pliensbachian-Toarcian (Early Jurassic) fossil record is an archive of natural data of benthic community response to global warming and marine long-term hypoxia and anoxia. In the early Toarcian mean temperatures increased by the same order of magnitude as that predicted for the near future; laminated, organic-rich, black shales were deposited in many shallow water epicontinental basins; and a biotic crisis occurred in the marine realm, with the extinction of approximately 5% of families and 26% of genera. High-resolution quantitative abundance data of benthic invertebrates were collected from the Cleveland Basin (North Yorkshire, UK), and analysed with multivariate statistical methods …
Pesticide Consumption And Productivity And The Potential Of Ipm In Bangladesh, S Rahman
Pesticide Consumption And Productivity And The Potential Of Ipm In Bangladesh, S Rahman
School of Geography, Earth and Environmental Sciences
The paper analyses trends in consumption, productivity and the determinants of pesticide use in Bangladesh over a 33 year period (1977-2009), including a discussion on the scope to expand Integrated Pest Management (IPM) practices. Pesticide use grew at an alarming rate of 10.0% per year (p<0.01) although the corresponding response in yield growth of major crops has been minimal (<1.0% per year). Pesticide productivity (i.e., 'gross value added from crops at constant prices' per 'kg of active ingredients of all pesticides used') is declining steadily at a rate of -8.6% per year (p<0.01). Adoption of Green Revolution (GR) technology, crop diversification, average farm size and literacy rate are the most significant determinants of pesticide use, whereas research and development (R&D) investment depresses pesticide use. Consistent evidence of excessive pesticide use in Bangladesh was observed. Although the government has shifted focus from pesticide use to IPM, its coverage remains inadequate as only 7.4% of the total farmers are covered after 30 years of effort. Tighter pesticide regulation and its effective implementation, and expansion of IPM through public, private and non-governmental organisation (NGO) stakeholders are suggested to reduce pesticide consumption.
Placing Livestock In Landscape Studies: Pastures New Or Out To Graze?, Jessica Sellick, Richard Yarwood
Placing Livestock In Landscape Studies: Pastures New Or Out To Graze?, Jessica Sellick, Richard Yarwood
School of Geography, Earth and Environmental Sciences
No abstract provided.
Relative Sensitivity Of Two Marine Bivalves For Detection Of Genotoxic And Cytotoxic Effects: A Field Assessment In The Tamar Estuary, South West England., Lorna J. Dallas, Victoria V. Cheung, Andrew S. Fisher, Awadhesh N. Jha
Relative Sensitivity Of Two Marine Bivalves For Detection Of Genotoxic And Cytotoxic Effects: A Field Assessment In The Tamar Estuary, South West England., Lorna J. Dallas, Victoria V. Cheung, Andrew S. Fisher, Awadhesh N. Jha
School of Geography, Earth and Environmental Sciences
The input of anthropogenic contaminants to the aquatic environment is a major concern for scientists, regulators and the public. This is especially relevant in areas such as the Tamar valley in SW England, which has a legacy of contamination from industrial activity in the nineteenth and twentieth centuries. Following on from previous laboratory validation studies, this study aimed to assess the relationship between genotoxic and cytotoxic responses and heavy metal concentrations in two bivalve species sampled from locations along the Tamar estuary. Adult cockles, Cerastoderma edule, and blue mussels, Mytilus edulis, were sampled from five locations in the Tamar and …
Accumulation Of Aqueous And Nanoparticulate Silver By The Marine Gastropod Littorina Littorea, Haiying Li, Andrew Turner, Murray T. Brown
Accumulation Of Aqueous And Nanoparticulate Silver By The Marine Gastropod Littorina Littorea, Haiying Li, Andrew Turner, Murray T. Brown
School of Geography, Earth and Environmental Sciences
No abstract provided.
Metal Accumulation Kinetics By The Estuarine Macroalga, Fucus Ceranoides, Ranjit Varma, Andrew Turner, Murray T. Brown, Geoff E. Millward
Metal Accumulation Kinetics By The Estuarine Macroalga, Fucus Ceranoides, Ranjit Varma, Andrew Turner, Murray T. Brown, Geoff E. Millward
School of Geography, Earth and Environmental Sciences
No abstract provided.
Predicting Malaysian Palm Oil Price Using Extreme Value Theory, K Chuangchid, S Sriboonchitta, S Rahman, A Wiboonpongse
Predicting Malaysian Palm Oil Price Using Extreme Value Theory, K Chuangchid, S Sriboonchitta, S Rahman, A Wiboonpongse
School of Geography, Earth and Environmental Sciences
This paper uses the extreme value theory (EVT) to predict extreme price events of Malaysian palm oil in the future, based on monthly futures price data for a 25 year period (mid-1986 to mid-2011). Model diagnostic has confirmed non-normal distribution of palm oil price data, thereby justifying the use of EVT. Two principal approaches to model extreme values – the Block Maxima (BM) and Peak-OverThreshold (POT) models – were used. Both models revealed that the palm oil price will peak at an incremental rate in the next 5, 10, 25, 50 and 100 year periods. The price growth level in …
Domestic Source Of Phosphorus To Sewage Treatment Works, Sean Comber, Michael Gardner, Karyn Georges, David Blackwood, Daniel Gilmour
Domestic Source Of Phosphorus To Sewage Treatment Works, Sean Comber, Michael Gardner, Karyn Georges, David Blackwood, Daniel Gilmour
School of Geography, Earth and Environmental Sciences
No abstract provided.
Energy Productivity And Efficiency Of Maize Accounting For The Choice Of Growing Season And Environmental Factors: An Empirical Analysis From Bangladesh, S Rahman, Ms Rahman
Energy Productivity And Efficiency Of Maize Accounting For The Choice Of Growing Season And Environmental Factors: An Empirical Analysis From Bangladesh, S Rahman, Ms Rahman
School of Geography, Earth and Environmental Sciences
The paper evaluates sustainability of maize cultivation in Bangladesh in terms of energy use while taking into account factors affecting choice of the growing season and farmers' production environment using a sample selection framework applied to stochastic frontier models. Results reveal that the probability of growing winter maize is influenced positively by gross return, irrigation, subsistence pressure, soil suitability and temperature variability whereas extension contact influences choice negatively. Significant differences exist between winter and summer maize regarding yield, specific energy, net energy balance, energy use efficiency and technical energy efficiency although both systems are highly sustainable and efficient. The energy …
Re-Examining Green Revolution Diffusion And Factor/Input Markets In Bangladesh After Market Liberalization, S Rahman, Ia Begum, Mj Alam
Re-Examining Green Revolution Diffusion And Factor/Input Markets In Bangladesh After Market Liberalization, S Rahman, Ia Begum, Mj Alam
School of Geography, Earth and Environmental Sciences
This paper re‐examines the effect of green revolution (GR) diffusion on factor/inputs demand in Bangladesh using an empirical model that allows for simultaneous determination of factors influencing adoption of GR technology at the current mature stage, as well as access to irrigation. Results reveal some alignments with conventional wisdom as well as few surprises. For example, while an increased demand for major inputs is expected, an increased demand for organic manure is an unexpected positive outcome. The GR adoption rate is significantly higher in villages with access to irrigation and fertile soils and, surprisingly, in infrastructurally underdeveloped villages. Together with …
Energy Productivity And Efficiency Of The ‘Gher’ (Prawn-Fish-Rice) Farming System In Bangladesh, S Rahman, Bk Barmon
Energy Productivity And Efficiency Of The ‘Gher’ (Prawn-Fish-Rice) Farming System In Bangladesh, S Rahman, Bk Barmon
School of Geography, Earth and Environmental Sciences
Gher' farming is a unique system that incorporates the joint operation of three enterprises: freshwater prawn, fish and HYV rice, and is expanding rapidly in the coastal regions of Bangladesh because of its proven high income earning potential. In this paper, the sustainability of this system is evaluated by analysing its performance in terms of energy use by applying a stochastic distance function approach which revealed interesting and unexpected results. The prawn enterprise which is the key income earning component is found to be technically inefficient while the rice enterprise is found to be efficient. The net energy balance and …
Modelling Of Bacterial Growth With Shifts In Temperature Using Automated Methods With Listeria Monocytogenes And Pseudomonas Aeruginosa As Examples, M Salih, I Mytilinaios, Hk Schofield, Rjw Lambert
Modelling Of Bacterial Growth With Shifts In Temperature Using Automated Methods With Listeria Monocytogenes And Pseudomonas Aeruginosa As Examples, M Salih, I Mytilinaios, Hk Schofield, Rjw Lambert
School of Geography, Earth and Environmental Sciences
Time to detection (TTD) measurements using turbidometry allow a straightforward method for the measurement of bacterial growth rates under isothermal conditions. Growth rate measurements were carried out for Listeria monocytogenes at 25, 30 and 37°C and for Pseudomonas aeruginosa over the temperature range 25 to 45°C. The classical three-parameter logistic model was rearranged to provide the theoretical foundation for the observed TTD. A model was subsequently developed for the analysis of TTD data from non-isothermal studies based on the Malthusian approximation of the logistic model. The model was able to predict the TTD for cultures of L. monocytogenes or P. …
Growth Curve Prediction From Optical Density Data, I Mytilinaios, M Salih, Hk Schofield, Rjw Lambert
Growth Curve Prediction From Optical Density Data, I Mytilinaios, M Salih, Hk Schofield, Rjw Lambert
School of Geography, Earth and Environmental Sciences
A fundamental aspect of predictive microbiology is the shape of the microbial growth curve and many models are used to fit microbial count data, the modified Gompertz and Baranyi equation being two of the most widely used. Rapid, automated methods such as turbidimetry have been widely used to obtain growth parameters, but do not directly give the microbial growth curve. Optical density (OD) data can be used to obtain the specific growth rate and if used in conjunction with the known initial inocula, the maximum population data and knowledge of the microbial number at a predefined OD at a known …
Joint Determination Of The Choice Of Growing Season And Economic Efficiency Of Maize In Bangladesh, S Rahman, Ms Rahman, Mh Rahman
Joint Determination Of The Choice Of Growing Season And Economic Efficiency Of Maize In Bangladesh, S Rahman, Ms Rahman, Mh Rahman
School of Geography, Earth and Environmental Sciences
The paper jointly evaluates the determinants of the choice of maize growing season (winter vs. summer maize) and economic efficiency of individual producers in Bangladesh using a sample selection framework applied to stochastic frontier models. Model diagnostics reveal that sample selection bias is significant, thereby justifying the use of this approach. Probit results reveal that the probability to choose winter maize are influenced positively by gross return, subsistence pressure and soil suitability, whereas extension contact influences choice negatively. Stochastic cost frontier results reveal that a rise in input prices and output level increases production cost as expected. Among the variables …
Evidence Of Microbial Activity From A Shallow Water Whale Fall (Voghera, Northern Italy), S Danise, B Cavalazzi, S Dominici, Et Al
Evidence Of Microbial Activity From A Shallow Water Whale Fall (Voghera, Northern Italy), S Danise, B Cavalazzi, S Dominici, Et Al
School of Geography, Earth and Environmental Sciences
The fossil bones, associated carbonate cements and enclosing concretion of a Miocene mysticete from inner shelf deposits (Monte Vallassa Formation, northern Italy) were analyzed for evidence of microbial activity. Optical and scanning electron microscopy, Raman spectroscopy, and stable C and O isotope geochemistry were used for high spatial resolution microfacies and biosedimentological analyses. Whale cancellous bones were filled by different carbonate cements including microcrystalline dolomite, rhombohedral dolomite and sparry calcite. Biofabric and biominerals such as microbial peloids, clotted textures and pyrite framboids were associated with the dolomite cements. Dolomite inside cancellous bones and in the enclosing concretion showed similar isotopic …
Podcast Pre-Labs For Enhanced Learning, Roy Lowry
Podcast Pre-Labs For Enhanced Learning, Roy Lowry
School of Geography, Earth and Environmental Sciences
Aims of project To script, record and make available a series of short (5-7 minutes) video podcasts which support first year chemistry laboratory sessions To evaluate the effectiveness of this approach Background to project Many students arrive at university with limited practical experience and hence a lot of laboratory time was spent demonstrating how to assemble equipment or correcting minor (but significant) errors in procedure. Whilst the laboratory handbook had been refined over several years, there is a limit to the amount of experience that can be transferred via the printed page. Hence, it was decided to made a series …
Determinants Of Household Livelihood Security In Poor Urban Settlements In Bangladesh, S Rahman, S Akter
Determinants Of Household Livelihood Security In Poor Urban Settlements In Bangladesh, S Rahman, S Akter
School of Geography, Earth and Environmental Sciences
The paper applies a quantitative approach to measure and identify the determinants of household livelihood security (HLS) status in poor urban settlements of two cities in Bangladesh. Indices were computed for five HLS areas (economic, food, health, education and empowerment) using a large set of socio-economic characteristics of the households. Results reveal that economic security is the dominant component of the overall livelihood security status followed by food security. Irrespective of regional differences in opportunities, people in poor urban settlements appear equally insecure. Development programs focusing on improvements in access to assets, education and livestock/fisheries based livelihoods programs are suggested.
Reflective Practice For Marine Planning: A Case Study Of Marine Nature-Based Tourism Partnerships, Claire Kelly, Stephen Essex, Gillian Glegg
Reflective Practice For Marine Planning: A Case Study Of Marine Nature-Based Tourism Partnerships, Claire Kelly, Stephen Essex, Gillian Glegg
School of Geography, Earth and Environmental Sciences
An essential component of ecosystem-based approaches in coastal zone management and the emerging field of marine planning are partnerships and collaborations between a range of multi-sector organisations and individuals. Ensuring that partnerships are effective is a priority for those responsible for planning and management in coastal and marine environments. Current partnership evaluation approaches, however, tend to view effectiveness as the cumulative end result of a set of variables acting in a linear process at a specific point in time. Given that governance and participation are acknowledged as non-linear and multifaceted processes, more reflective and nuanced approaches that take account of …
Modeling Volatility And Interdependencies Of Thai Rubber Spot Price Return With Climatic Factors, Exchange Rate And Crude Oil Markets, Wc Sang, S Sriboonchitta, S Rahman, Wt Huang, A Wiboonpongse
Modeling Volatility And Interdependencies Of Thai Rubber Spot Price Return With Climatic Factors, Exchange Rate And Crude Oil Markets, Wc Sang, S Sriboonchitta, S Rahman, Wt Huang, A Wiboonpongse
School of Geography, Earth and Environmental Sciences
Thailand is a leading producer and exporter of rubber in the world market. The interdependencies and volatility of Thai rubber price return with climatic factors (precipitation and temperature), exchange rate, and crude oil market returns are determined in this paper. Vector autoregressive moving average process with generalized autoregressive conditional heteroscedasticity (VARMA-GARCH), VARMA with generalized autoregressive conditional heteroscedasticity (VARMA-AGARCH), and copula-based GARCH models were employed for the analyses. The results demonstrated the interdependencies of Thai rubber price return with dollar and crude oil returns as well as with crude oil return and climatic factors in the VARMA-AGARCH and the copula-based GARCH …