Forthcoming articles

 


International Journal of Global Warming

 

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International Journal of Global Warming (10 papers in press)

 

Regular Issues

 

  • The role of macroeconomic development on carbon emissions for 15 Asian countries: Panel ARDL Approach   Order a copy of this article
    by Wen-Cheng Lu 
    Abstract: This article utilized the panel autoregressive distributed lag model (ARDL) to examine the link between macroeconomic developments and carbon emissions for 15 Asian countries from 1990 to 2013. The results of the panel ARDL model showed that there existed long-run equilibrium relationships between principal macroeconomic variables and carbon emissions in the sample. The long-run elasticity of renewable energy and fossil fuels energy consumption with respect to CO_2 emissions was calculated as -0.299 and 0.967, respectively. The long-run elasticity of GDP, financial development, urban population density, and industry value added share with respect to CO_2 emissions was calculated as 0.473, 0.079, -0.633, and -0.10, respectively. FDI was significantly negatively related to CO_2 emissions which was calculated as -0.06 in the short-run. These results suggested that FDI inflow was not yet an environmental threat for Asian economies. Renewable energy and upgrades to industry value added share will help various governments mitigate carbon emissions.
    Keywords: Carbon emissions; industry value added; foreign direct investment; energy consumption; macroeconomic development;; renewable energy.

  • Current trends in scientific research on global warming: A bibliometric analysis.   Order a copy of this article
    by Jose Luis Aleixandre-Tudo, Maxima Bolanos-Pizarro, Jose Luis Aleixandre, Rafael Aleixandre-Benavent 
    Abstract: The objective of this paper was to contribute to a better understanding of the scientific knowledge in global warming, as well as to investigate the evolution of the research knowledge on the topic through the published papers included in Web of Science database. A bibliometric and social network analyses was performed to obtain indicators of scientific productivity, impact and collaboration between researchers, institutions and countries. A subject analysis was also carried out taking into account the keywords assigned to papers and subject areas of journals. A number of 1,672 articles from 2005 to 2014 were analysed. The results showed Journal of Climate (n=95) and Geophysical Research Letters (n=78) as the most productive journals and Climate Change (n=722), Model (n=216) and Temperature (n=196) as the most frequent keyword. A steadily increased in the research conducted on global warming was clearly identified during the last decade. A vast amount of journals publishing papers on the topic including several subject areas, such as Meteorology, Atmospheric sciences, Environmental sciences, Geosciences, Ecology, Energy and Fuels, Economics and Oceanography, among others, including high impact factor journals of general purpose, was also observed. The network of collaboration between countries showed the central position of United States, Germany, United Kingdom and France.
    Keywords: Global warming; research trends; scientific collaboration; bibliometric analysis; social network analysis.

  • Long term analysis of the subtropical jet over the Arabian Peninsula   Order a copy of this article
    by Falah Al Dalabeeh, Emad Imreizeeq, Hajar Alnaqi 
    Abstract: In this study, the long term change of the Arabian Peninsula subtropical jet stream (APJS) is investigated for winter time of the period 1980-2014, using data retrieved from NCEP/NCAR reanalysis of the geopotential heights 300 hPa, 200 hPa and 150 hPa. The value and position of the monthly mean of the maximum zonal wind in the jet core are determined for the mentioned period and analyzed. Also 200 hPa wind speed data of three selected points with different latitudes and longitudes are analyzed. We found that the APJS has experienced a pronounced change. It is shifting poleward and eastward for about 1.5o in January and 2.5o in February also its speed has a slight increase during autumn and more pronounced in winter. However, it is decreasing during spring and the beginning of summer. Furthermore, while the jet is steady at 300 hPa, it is intensified with increasing height, except in March where it is weakening in general. The analysis of points of different positions shows that the wind speed is broadly decreasing in the tropics, whereas the wind speed increases in the subtropics. The time series analysis of the u-component of the jet maximum series, in general, indicated non-randomness, implying 3-4 years for December and 2-3 years and 8 years for January and February of periodicity.
    Keywords: long term changes; trends; spectral analysis; Arabian Peninsula; Subtropical jet stream.

  • Global warming analysis for greenhouse gases impacts comparable to carbon-free nuclear energy using neuro-fuzzy algorithm   Order a copy of this article
    by T.A.E. H.O. WOO 
    Abstract: As one of energy characteristics, the importance of climate effects has been increasing due to the side-effect such as the draught, flood, heavy snow and so on. The nonlinear artificial intelligence can be reasonably applied in the analysis of the simulations, because the human-brain mimicking algorithm can show the practicable results. Basically, the quantifications in the study results are based on the randomly generated numbers where the Monte Carlo methods are applied. The Boolean numbers are generated in the variable constructions. Furthermore, there are multiplications in Population which are decided by the expert judgments. The causes loops for CO2 and Temperature are obtained. In addition, there is the result of variable Albedo vs. normalized Temperature with dimensionless values. Global collaboration can prepare and control the global warming as the geological scale aspect as well as the collaborated idea utilization that can develop the carbon minimizing technology and green energy development.
    Keywords: Global warming; Neuro-fuzzy; Nuclear energy; Artificial intelligence.

  • Thermodynamic assessment of the impact of the climate change on the honeybees   Order a copy of this article
    by Mustafa Özilgen, Cennet Yıldız 
    Abstract: Honeybees are among the most sensitive biological species to the changes in environmental conditions. Since pollination is necessary for the cultivation of more than 75% of the crops used directly by the people worldwide, any injury to the honeybee population due to the climate change may jeopardize the food security. Thermodynamic parameters which may affect the honeybees in the case of an anticipated temperature change, including the total of the average global warming temperature increase, plus the usual seasonal temperature changes, plus the large temperature fluctuations caused by the climate change, are assessed. Work performance and entropy generation by the honeybees while resting, foraging for nutrients outside the hive and fanning the hive are assessed based on sucrose metabolism. The minimum entropy generation accounted was 1.2 x10-7 W/g honeybee K while the 1-7 h old young honeybees were resting under atmospheric pressure with 0.5 M of sucrose supply at 15 μl/min flow rate in the hive. The maximum entropy generation, 7.2 x10-5 W/g honeybee K, was accounted during foraging at 35oC at shade with 0.5 M of unlimited sucrose supply. With 3,000 honeybees, work performance was 3.17 kJ/kg dry air, heat generation was 4.44 kJ/kg dry air and the entropy generation is 161.6 W/g honeybee K while raising the temperature of the hive by 1oC. On the other hand, they have to perform 4.5 kJ/kg dry air of work, generate 7.27 kJ/kg dry air of heat and 308.9 W/g honeybee K of entropy to reduce the temperature of the hive by 1oC. The results show that during cooling by 1oC the honey bees performed 1.4 folds of work and generated 1.9 folds of entropy when compared to that of heating by 1oC, implying that global warming may create 90% more entropy stress on the honeybees, when compared to that of a potential global cooling.
    Keywords: Thermodynamic modeling; honeybee; climate change.

  • Carbon footprint of the generation of bioelectricity from sugarcane bagasse in a sugar and ethanol industry   Order a copy of this article
    by Monica Carvalho, Valdir Bernardino Da Silva Segundo, Mariane Gama De Medeiros, Nataly Albuquerque Dos Santos, Luiz Moreira Coelho Junior 
    Abstract: Brazil indicated a commitment of reducing greenhouse gas emissions at the Paris Conference in 2015, which has led the Brazilian government to incentivize the use of renewable energy sources. Biomass is a renewable energy source that can be used to produce electricity, with its availability mainly connected to the sugar and alcohol sector in Brazil. The study presented herein applied the Life Cycle Assessment methodology to the generation of electricity from sugarcane bagasse and from diesel in thermoelectric power plants, and verified the potential to mitigate climate change. The production of electricity from sugarcane bagasse presented a low carbon footprint (0.227 kg CO2-eq/kWh), much lower than the diesel thermoelectric process (1.060 kg CO2-eq/kWh). Considering that diesel-based electricity could be substituted by bioelectricity, the result would be overall avoided emissions of -0.833 kg CO2-eq/kWh. The progressive use of sugarcane bagasse as a source of electricity presents therefore the potential to help mitigate climate change, being part of a wider scheme for the substitution of fuels.
    Keywords: sugarcane bagasse; electricity; bioenergy; life cycle assessment; carbon footprint.

  • Biogas Production in Semi-continuous-flow Reactors Using Fresh Water Hyacinth from the Chao Phraya River   Order a copy of this article
    by Nusara Sinbuathong, Wannapa Kratay, Netchanok Sombat, Suchat Leungprasert, Suriya Sawanon 
    Abstract: Biogas production was studied from the digestion of water hyacinth (WH), co-digestion of WH with cow dung and co-digestion of pretreated WH with dilute sodium hydroxide (NaOH). The reactors were fed with 20% by fresh weight of the substrate mixture of various ratios in semi-continuous-flow reactors at 30
    Keywords: anaerobic digestion;bioenergy;biogas;co-digestion;cow dung;greenhouse gas; methane;pretreatment;water hyacinth.

  • Heating Design Temperatures, Freezing Degree-Hours and Number of Freezing Hours for Selected Cities in Turkey   Order a copy of this article
    by Saban Pusat 
    Abstract: In this study, the heating design temperatures (HDTs), the freezing degree-hours (FDHs) and the number of freezing hours (NFHs) were examined for the selected cities in Turkey. Eight cities were selected for the analyses, which represent the different climatic regions of Turkey. In the analyses, the typical meteorological year (TMY) data was used. Therefore, the obtained results may be used as a general knowledge for the selected cities. According to the results of this study, the yearly minimum and maximum FDHs were calculated as 27.2 and 13842.5 for Adana and Sivas, respectively (the case 1). The minimum and maximum NFHs were obtained as 25 and 2355 for Adana and Sivas, respectively (the case 1). Sivas had the highest FDH and NFH values for all the cases. Therefore, Sivas had the highest risk of freezing and icing. Additionally, there was not a significant risk of freezing and icing in Adana, Denizli, İstanbul and Trabzon. The HDTs were calculated for the selected cities, which were the most current data for Turkey and different from the traditional data used by the Authorities. In the literature, there has not been much study on the topic of freezing and design temperature. Therefore, this study contributes to the Turkish and world literature.
    Keywords: Freezing; icing; degree-hour; freezing degree-hour; number of freezing hour; Heating design temperature; Turkey.

  • INVESTIGATION AND PERFORMANCE ASSESSMENT OF CALCIUM BROMINE CYCLE FOR HYDROGEN PRODUCTION   Order a copy of this article
    by Fatih Yilmaz, Resat SELBAS 
    Abstract: Thermochemical and hybrid cycles have become increasingly important in recent years among the hydrogen production methods. In this proposed work, a thermodynamic performance evaluation of calcium bromide (Ca-Br2) hybrid thermochemical cycle is investigated for hydrogen generation. This cycle consists of two chemical reactions and one electrochemical reaction. Energy and exergy efficiencies of each step and overall cycle are examined according to several parameters such as reference and reaction temperatures. In addition, we have conducted pure thermodynamic analyses according to the heat demand of steps and reference temperature. Results indicate that the total heat demand and overall exergy destruction rate of Ca-Br2 cycle computed as 409 kJ/mole H2 and 183.55 409 kJ/mole H2, respectively. In addition, energy and exergy efficiencies of the examined cycle are found as 46.64% and 59.04%, respectively, at 25oC reference temperature.
    Keywords: Energy; exergy; hydrogen; Ca-Br2.

  • Assessing heat wave vulnerability in Beijing and its districts,using a three dimensional model   Order a copy of this article
    by Mingshun Zhang, Huan Wang, Wei Jin, Meine Pieter Van Dijk 
    Abstract: An urban Heat Wave Vulnerability Index (HWVI) is created and tested in Beijing and different districts in the city. It is based on a limited number of indicators, but enough indicators to effectively measure heat wave vulnerability, a consequence of urbanization and climate change in many cities. The paper defines heat wave vulnerability based on international literature and in the specific context of Beijing. The heat wave vulnerability index developed uses data on 9 individual indicators covering the three core components exposure, sensibility and adaptive capacity. Together they create a comprehensive HWVI score. Testing the HWVI in Beijing shows that heat wave vulnerability increased slightly in Beijing in the period of 2008 to 2016. Vulnerability differs between the 16 districts of Beijing. High vulnerability is observed in the urban downtown area and development areas, lower vulnerability is measured in the urban periphery. Very low vulnerability is found in the ecological conservation areas of some districts. This study develops and applies a methodological approach that could serve other mega cities in developing heat wave adaptation policies. Findings are relevant for Beijing to develop its climate change adaptation actions. Policy recommendations are provided and further research on heat wave vulnerability assessment is suggested.
    Keywords: Heat wave; Vulnerability assessment; Climate change; Adaptation; Heat wave vulnerability index; Beijing.