scholarly journals World Calibration Center for SF<sub>6</sub> – supporting the quality system of the global atmosphere observation

2012 ◽  
Vol 5 (5) ◽  
pp. 7899-7921
Author(s):  
J. Lee ◽  
D. Moon ◽  
D. Min ◽  
W. Yun
Keyword(s):  
Mole Fraction ◽  
Sulfur Hexafluoride ◽  
Primary Standard ◽  
Quality System ◽  
National Metrology Institute ◽  
Calibration Laboratory ◽  
Working Standard ◽  
Traceability Chain ◽  
Long Run ◽  
The World

Abstract. According to the World Meteorological Organization (WMO) Global Atmosphere Watch (GAW) Strategic Plan: 2008–2015 (WMO, 2009a) WMO/GAW pays attention to systematical improvement of the quality of observations at global or regional monitoring sites. To ensure the comparability and compatibility of the measurements worldwide it is essential to maintain a traceability chain to the primary standard in the different laboratories around the world as well as to establish a quality control system. Sulfur hexafluoride (SF6), is reported to be very rare in the atmosphere at the global averaged annual mole fraction of about 7 ppt, it is one of the greenhouse gases regulated by Kyoto protocol and is increasing at a rate of 0.22 ppt yr−1. Development of a working (or transfer) standard with very low concentration of SF6 requires expert technologies and several knowhow of gas metrology. In order to meet the Data Quality Objective (DQO), the KMA has cooperated with the Korea Research Institute of Standards and Science (KRISS), which is the National Metrology Institute in South Korea. So long as the Central Calibration Laboratory (CCL) for SF6 was established, the Korea Meteorological Administration (KMA) is now trying to take another step forward to systematically support GAW stations in improving their traceability and quality system for SF6, thereby making a contribution to the WMO/GAW. Through hosting the World Calibration Center for SF6, which is one of GAW facilities, KMA will contribute to harmonization of the global SF6 observations in the long run. This work performed to demonstrate some measurement results on SF6 which complies with the DQOs and is traceable to the WMO mole fraction scale for SF6. In order to produce a working standard which is traceable to the WMO scale, we developed highly precise method of a Gas Chromatography/Electron Capture Detector (GC/ECD) calibrated against the five cylinders (from NOAA, 2011) of the WMO scale. For all analysis the measurement repeatability was < 0.02 ppt (standard deviation) and analyzer's stability was controlled within a drift of 0.02 ppt. Finally, a working standard which is consistent with WMO scale and satisfies the WMO DQOs of ±0.02 ppt was successfully produced and is ready to be transferred to the GAW stations.

scholarly journals High-precision analysis of SF<sub>6</sub> at ambient level

2013 ◽  
Vol 6 (9) ◽  
pp. 2293-2299 ◽  
Author(s):  
J. S. Lim ◽  
D. M. Moon ◽  
J. S. Kim ◽  
W.-T. Yun ◽  
J. Lee
Keyword(s):  
United States Of America ◽  
Calibration Method ◽  
Gas Chromatograph ◽  
Activated Alumina ◽  
Calibration Laboratory ◽  
Working Standard ◽  
Calibration Methods ◽  
Precise Analysis ◽  
The World ◽  
Korea Research Institute

Abstract. This work reports on the development of a technique for the precise analysis of ambient SF6. This technique, which involves a gas chromatograph/electron capture detector (GC-ECD) coupled with an Activated Alumina-F1 (AA-F1) column, performed well in the measurements, particularly in terms of accuracy, which complies with the World Meteorological Organization (WMO)-recommended compatibility of 0.02 ppt. Compared to the Porapak Q technique, we observed a sharper peak shape for the SF6 stream, which substantiates the improvement in the analytical precision. The traceability to the WMO scale was tested by calibrating the GC-ECD/AA-F1 analyser using five SF6 standards provided by the WMO/Global Atmosphere Watch (GAW) Central Calibration Laboratory (CCL) for SF6 (NOAA, United States of America). After calibration by various methods, the GC-ECD/AA-F1 accurately estimated the mole fraction of SF6 in the working standard prepared by the World Calibration Centre for SF6 operated by the Korea Meteorological Administration (KMA)/Korea Research Institute of Standards and Science (KRISS). Among the calibration methods, the two-point calibration method emerged to be the most economical procedure in terms of the data quality and measurement time. It was found that the KRISS scale of SF6/N2 was biased by 0.13 ppt when compared to the WMO scale of SF6/air; this bias is probably due to a different matrix.

scholarly journals Revision of the World Meteorological Organization Global Atmosphere Watch (WMO/GAW) CO<sub>2</sub> calibration scale

2021 ◽  
Vol 14 (4) ◽  
pp. 3015-3032
Author(s):  
Bradley D. Hall ◽  
Andrew M. Crotwell ◽  
Duane R. Kitzis ◽  
Thomas Mefford ◽  
Benjamin R. Miller ◽  
...  
Keyword(s):  
Mole Fraction ◽  
Virial Coefficient ◽  
Second Virial Coefficient ◽  
World Meteorological Organization ◽  
Tertiary Level ◽  
Calibration Laboratory ◽  
Atmospheric Monitoring ◽  
The World ◽  
Atmospheric Data ◽  
Primary Standards

Abstract. The NOAA Global Monitoring Laboratory serves as the World Meteorological Organization Global Atmosphere Watch (WMO/GAW) Central Calibration Laboratory (CCL) for CO2 and is responsible for maintaining the WMO/GAW mole fraction scale used as a reference within the WMO/GAW program. The current WMO-CO2-X2007 scale is embodied by 15 aluminum cylinders containing modified natural air, with CO2 mole fractions determined using the NOAA manometer from 1995 to 2006. We have made two minor corrections to historical manometric records: fixing an error in the applied second virial coefficient of CO2 and accounting for loss of a small amount of CO2 to materials in the manometer during the measurement process. By incorporating these corrections, extending the measurement records of the original 15 primary standards through 2015, and adding four new primary standards to the suite, we define a new scale, identified as WMO-CO2-X2019. The new scale is 0.18 µmol mol−1 (ppm) greater than the previous scale at 400 ppm CO2. While this difference is small in relative terms (0.045 %), it is significant in terms of atmospheric monitoring. All measurements of tertiary-level standards will be reprocessed to WMO-CO2-X2019. The new scale is more internally consistent than WMO-CO2-X2007 owing to revisions in propagation and should result in an overall improvement in atmospheric data records traceable to the CCL.

The working standard of the unit of power of electromagnetic waves in the frequency range from 37,5 to 220 GHz

2020 ◽  
pp. 53-58
Author(s):  
A. V. Koudelny ◽  
I. M. Malay ◽  
V. A. Perepelkin ◽  
I. P. Chirkov
Keyword(s):  
Microwave Power ◽  
Electromagnetic Waves ◽  
Primary Standard ◽  
The State ◽  
Frequency Range ◽  
Working Standard ◽  
Extended Frequency Range ◽  
Effective Efficiency ◽  
Extended Frequency ◽  
Good Agreement

The possibility of using bolometric converters of microwave power from the State primary standard of the unit of power of electromagnetic waves in waveguide and coaxial paths GET 167-2017, which has a frequency range from 37,5 to 78,33 GHz, in an extended frequency range up to 220 GHz, is shown. Studies of semiconductor bolometric converters of microwave power in an extended frequency range have confirmed good agreement and smooth frequency characteristics of the effective efficiency factor of the converters. Based on the research results, the State working standard of the unit of power of electromagnetic waves of 0,1–10 mW in the frequency range from 37,5 to 220 GHz 3.1.ZZT.0288.2018 was approved. The technical characteristics of the working standard of the unit of power of electromagnetic oscillations in an extended frequency range from 37,5 to 220 GHz are given.

The Role of Technological Change in the Long-run Global Economy Forecasting

2013 ◽  
pp. 97-116 ◽  
Author(s):  
A. Apokin
Keyword(s):  
Technological Change ◽  
Data Quality ◽  
Long Range ◽  
Global Economy ◽  
World Economy ◽  
Qualitative Approaches ◽  
Long Run ◽  
The World ◽  
National Economies

The author compares several quantitative and qualitative approaches to forecasting to find appropriate methods to incorporate technological change in long-range forecasts of the world economy. A?number of long-run forecasts (with horizons over 10 years) for the world economy and national economies is reviewed to outline advantages and drawbacks for different ways to account for technological change. Various approaches based on their sensitivity to data quality and robustness to model misspecifications are compared and recommendations are offered on the choice of appropriate technique in long-run forecasts of the world economy in the presence of technological change.

An Econometric Analysis on the Relationship between Globalisation and Inequality in South Africa

2020 ◽  
Vol 11 (1) ◽  
pp. 89-89
Author(s):  
Jacques de Jongh
Keyword(s):  
South Africa ◽  
Well Being ◽  
Causality Analysis ◽  
Global Integration ◽  
Development Indicators ◽  
Long Run ◽  
The World ◽  
Distribution Of Resources ◽  
Short Run ◽  
The Impact

Globalisation has had an unprecedented impact on the development and well-being of societies across the globe. Whilst the process has been lauded for bringing about greater trade specialisation and factor mobility many have also come to raise concerns on its impact in the distribution of resources. For South Africa in particular this has been somewhat of a contentious issue given the country's controversial past and idiosyncratic socio-economic structure. Since 1994 though, considerable progress towards its global integration has been made, however this has largely coincided with the establishment of, arguably, the highest levels of income inequality the world has ever seen. This all has raised several questions as to whether a more financially open and technologically integrated economy has induced greater within-country inequality (WCI). This study therefore has the objective to analyse the impact of the various dimensions of globalisation (economic, social and political) on inequality in South Africa. Secondary annual time series from 1990 to 2018 were used sourced from the World Bank Development indicators database, KOF Swiss Economic Institute and the World Inequality database. By using different measures of inequality (Palma ratios and distribution figures), the study employed two ARDL models to test the long-run relationships with the purpose to ensure the robustness of the results. Likewise, two error correction models (ECM) were used to analyse the short-run dynamics between the variables. As a means of identifying the casual effects between the variables, a Toda-Yamamoto granger causality analysis was utilised. Keywords: ARDL, Inequality, Economic Globalisation; Social Globalisation; South Africa

Twitter users exhibited coping behaviours during the COVID-19 lockdown: an analysis of tweets using mixed methods

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ruchi Mittal ◽  
Wasim Ahmed ◽  
Amit Mittal ◽  
Ishan Aggarwal
Keyword(s):  
Data Analysis ◽  
The Body ◽  
Data Set ◽  
Content Type ◽  
Twitter Data ◽  
Long Run ◽  
The World ◽  
Twitter Users ◽  
The Government ◽  
Using Data

Purpose Using data from Twitter, the purpose of this paper is to assess the coping behaviour and reactions of social media users in response to the initial days of the COVID-19-related lockdown in different parts of the world. Design/methodology/approach This study follows the quasi-inductive approach which allows the development of pre-categories from other theories before the sampling and coding processes begin, for use in those processes. Data was extracted using relevant keywords from Twitter, and a sample was drawn from the Twitter data set to ensure the data is more manageable from a qualitative research standpoint and that meaningful interpretations can be drawn from the data analysis results. The data analysis is discussed in two parts: extraction and classification of data from Twitter using automated sentiment analysis; and qualitative data analysis of a smaller Twitter data sample. Findings This study found that during the lockdown the majority of users on Twitter shared positive opinions towards the lockdown. The results also found that people are keeping themselves engaged and entertained. Governments around the world have also gained support from Twitter users. This is despite the hardships being faced by citizens. The authors also found a number of users expressing negative sentiments. The results also found that several users on Twitter were fence-sitters and their opinions and emotions could swing either way depending on how the pandemic progresses and what action is taken by governments around the world. Research limitations/implications The authors add to the body of literature that has examined Twitter discussions around H1N1 using in-depth qualitative methods and conspiracy theories around COVID-19. In the long run, the government can help citizens develop routines that help the community adapt to a new dangerous environment – this has very effectively been shown in the context of wildfires in the context of disaster management. In the context of this research, the dominance of the positive themes within tweets is promising for policymakers and governments around the world. However, sentiments may wish to be monitored going forward as large-spikes in negative sentiment may highlight lockdown-fatigue. Social implications The psychology of humans during a pandemic can have a profound impact on how COVID-19 shapes up, and this shall also include how people behave with other people and with the larger environment. Lockdowns are the opposite of what societies strive to achieve, i.e. socializing. Originality/value This study is based on original Twitter data collected during the initial days of the COVID-19-induced lockdown. The topic of “lockdowns” and the “COVID-19” pandemic have not been studied together thus far. This study is highly topical.

FINANCIAL GLOBALIZATION OF THE WORLD ECONOMY

2017 ◽  
Author(s):  
Tamara Makukh ◽  
Keyword(s):  
World Economy ◽  
Financial Regulation ◽  
High Tech ◽  
Credit System ◽  
Early Effect ◽  
Economic Productivity ◽  
Total Debt ◽  
Long Run ◽  
The World ◽  
Debt Market

The article analyses the main trends in the world economy through the prism of the current global financial and credit system. Various forecasts for the development of the world economy were assessed and noted that they do not correspond to real trends and patterns. These forecasts cannot assess the conceptual principles of the structure of the financial and credit base of the economy. Such forecasting is carried out on the principles of the achieved indicators and the developed methods of estimation of disturbances in the financial markets. The specificity of the state of the debt market is indicated, which allows to develop the economy only by increasing the total debt obligations, which leads to a complete loss of profitability of debt securities. It is proved that no defaults and debt write-offs do not renew the economy; these instruments only restart the mechanism of holding the debt market. Such development is a direct consequence of liberal regulation and a departure from the full functions of money, which leads to a conceptual change in the paradigm of the financial system. The limitations of the dominant concept of the financial and credit system, which was based on the basic foundations of the Bretton Woods Conference, were revealed. Criteria for financial regulation of a market economy have been identified and substantiated, which have exhausted their effectiveness and do not guarantee an early effect, but are only immediate. It is noted that the global pandemic and financial infusions to overcome it are a tool for accumulating total debt in the long run. The primary measures for debt restructuring are indicated, namely the support of low-debt fundamental companies that will meet the objective basic needs of innovative companies. Factors of economic development are explained: growth of economic productivity, short-term and long-term credit cycles and political component. It is indicated that productivity determines the priority of society's development in the long run, and the element of its implementation is knowledge in the absence of political dictate, which will form a new financial and credit mechanism. High-tech knowledge is needed to ensure productivity development, so investing in education and knowledge without different dogmas can bring the world economy to a new level of efficiency.

Brazil and Russia: Different Trajectories of Development?

2012 ◽  
pp. 92-104
Author(s):  
G. Irishin
Keyword(s):  
Economic Growth ◽  
Human Capital ◽  
Social Development ◽  
Brics Countries ◽  
Long Run ◽  
Main Emphasis ◽  
The World

This publication represents the materials of the regular academic seminar “The current problems of development” conducted by the Center of the problems of development and modernization within IMEMO. The attention of the key speakers and other seminar participants is focused on the comparison of the two BRICS countries – Brazil and Russia. The main emphasis is made on the analysis of the trends of social development. The point is that the quality of human capital determines the quality of economic growth, as well as the country's place in the world in the long run.

scholarly journals The world market for soybeans: price transmission into Brazil and effects from the timing of crop and trade

Nova Economia ◽  
2007 ◽  
Vol 17 (2) ◽  
pp. 241-270 ◽  
Author(s):  
Mario A. Margarido ◽  
Frederico A. Turolla ◽  
Carlos R. F. Bueno
Keyword(s):  
United States ◽  
Forecast Error ◽  
The United States ◽  
World Market ◽  
Price Transmission ◽  
Long Run ◽  
Cointegration Tests ◽  
The World ◽  
The Law ◽  
The One

This paper investigates the price transmission in the world market for soybeans using time series econometrics models. The theoretical model developed by Mundlack and Larson (1992) is based on the Law of the One Price, which assumes price equalization across all local markets in the long run and allows for deviations in the short run. The international market was characterized by three relevant soybean prices: Rotterdam Port, Argentina and the United States. The paper estimates the elasticity of transmission of these prices into soybean prices in Brazil. There were carried causality and cointegration tests in order to identify whether there is significant long-term relationship among these variables. There was also calculated the impulse-response function and forecast error variance decomposition to analyze the transmission of variations in the international prices over Brazilian prices. An exogeneity test was also carried out so as to check whether the variables respond to short term deviations from equilibrium values. Results validated the Law of the One Price in the long run. In line with many studies, this paper showed that Brazil and Argentina can be seen as price takers as long as the speed of their adjustment to shocks is faster than in the United States, the latter being a price maker.

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