scholarly journals Greenhouse gas measurements from a UK network of tall towers: technical description and first results

2017 ◽  
Author(s):  
Kieran M. Stanley ◽  
Aoife Grant ◽  
Simon O'Doherty ◽  
Dickon Young ◽  
Alistair J. Manning ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Greenhouse Gas ◽  
The United Kingdom ◽  
First Results ◽  
Gas Measurements ◽  
Set Up ◽  
The Uk ◽  
Tall Tower

Abstract. A network of tall tower measurement stations was set up in 2012 across the United Kingdom to expand measurements made at the long-term background northern hemispheric site, Mace Head, Ireland. Reliable and precise in situ greenhouse gas (GHG) analysis systems were developed and deployed at three sites in the UK with automated custom-built instrumentation measuring a suite of GHGs. The UK Deriving Emissions linked to Climate Change (UK DECC) network uses tall (165–230 m) open lattice telecommunications towers, which provide a convenient platform for boundary layer trace gas sampling. In this paper we describe the automated measurement system and first results from the UK DECC network for CO2, CH4, N2O, SF6, CO and H2. CO2 and CH4 are measured at all of the UK DECC sites by cavity ring-down spectroscopy (CRDS) with multiple inlet heights at two of the three tall tower sites to assess for boundary layer stratification. The long-term 1-minute mean precisions (1σ) of CRDS measurements at background mole fractions for January 2012 to September 2015 is

scholarly journals Greenhouse gas measurements from a UK network of tall towers: technical description and first results

2018 ◽  
Vol 11 (3) ◽  
pp. 1437-1458 ◽  
Author(s):  
Kieran M. Stanley ◽  
Aoife Grant ◽  
Simon O'Doherty ◽  
Dickon Young ◽  
Alistair J. Manning ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Greenhouse Gas ◽  
Gas Flow ◽  
Night Time ◽  
Diurnal Cycles ◽  
Mixing Ratios ◽  
First Results ◽  
Gas Measurements ◽  
The Uk ◽  
Tall Tower

Abstract. A network of three tall tower measurement stations was set up in 2012 across the United Kingdom to expand measurements made at the long-term background northern hemispheric site, Mace Head, Ireland. Reliable and precise in situ greenhouse gas (GHG) analysis systems were developed and deployed at three sites in the UK with automated instrumentation measuring a suite of GHGs. The UK Deriving Emissions linked to Climate Change (UK DECC) network uses tall (165–230 m) open-lattice telecommunications towers, which provide a convenient platform for boundary layer trace gas sampling. In this paper we describe the automated measurement system and first results from the UK DECC network for CO2, CH4, N2O, SF6, CO and H2. CO2 and CH4 are measured at all of the UK DECC sites by cavity ring-down spectroscopy (CRDS) with multiple inlet heights at two of the three tall tower sites to assess for boundary layer stratification. The short-term precisions (1σ on 1 min means) of CRDS measurements at background mole fractions for January 2012 to September 2015 is < 0.05 µmol mol−1 for CO2 and < 0.3 nmol mol−1 for CH4. Repeatability of standard injections (1σ) is < 0.03 µmol mol−1 for CO2 and < 0.3 nmol mol−1 for CH4 for the same time period. N2O and SF6 are measured at three of the sites, and CO and H2 measurements are made at two of the sites, from a single inlet height using gas chromatography (GC) with an electron capture detector (ECD), flame ionisation detector (FID) or reduction gas analyser (RGA). Repeatability of individual injections (1σ) on GC and RGA instruments between January 2012 and September 2015 for CH4, N2O, SF6, CO and H2 measurements were < 2.8 nmol mol−1, < 0.4 nmol mol−1, < 0.07 pmol mol−1, < 2 nmol mol−1 and < 3 nmol mol−1, respectively. Instrumentation in the network is fully automated and includes sensors for measuring a variety of instrumental parameters such as flow, pressures, and sampling temperatures. Automated alerts are generated and emailed to site operators when instrumental parameters are not within defined set ranges. Automated instrument shutdowns occur for critical errors such as carrier gas flow rate deviations. Results from the network give good spatial and temporal coverage of atmospheric mixing ratios within the UK since early 2012. Results also show that all measured GHGs are increasing in mole fraction over the selected reporting period and, except for SF6, exhibit a seasonal trend. CO2 and CH4 also show strong diurnal cycles, with night-time maxima and daytime minima in mole fractions.

scholarly journals UK greenhouse gas measurements at two new tall towers for aiding emissions verification

2018 ◽  
Author(s):  
Ann R. Stavert ◽  
Simon O'Doherty ◽  
Kieran Stanley ◽  
Dickon Young ◽  
Alistair J. Manning ◽  
...  
Keyword(s):  
Greenhouse Gas ◽  
Empirical Correction ◽  
The World ◽  
Northern Hemispheric ◽  
Gas Measurements ◽  
The Uk ◽  
The Impact ◽  
Global Emissions ◽  
Residual Errors ◽  
Tall Tower

Abstract. Under the UK focused Greenhouse gAs and Uk and Global Emissions (GAUGE) project, two new tall tower greenhouse gas (GHG) observation sites were established in the 2013/2014 Northern Hemispheric winter. These sites were located at two existing telecommunications towers, Heathfield (HFD) and Bilsdale (BSD), utilised a combination of cavity ring-down spectroscopy (CRDS) and gas chromatography (GC) to measure key GHGs (CO2, CH4, CO, N2O and SF6). Measurements were made at multiple intake heights on each tower. The inclusion of the two additional tower stations within the existing UK Deriving Emissions linked to Climate Change (DECC) network of four stations was found to reduce the uncertainty of CH4 UK emission estimates by between 10–20 %. CO2 and CH4 dry mole fractions were calculated from either CRDS measurements of wet air which were post corrected with an instrument specific empirical correction or samples dried to between 0.05 and 0.3 % H2O using a Nafion dryer, with a smaller correction applied for the residual H2O. The impact of these two drying strategies was examined. Drying with a Nafion drier was not found to have a significant effect on the observed CH4 mole fraction; however, Nafion drying did cause a 0.02 µmol mol−1 CO2 bias. This bias was stable with sample CO2 mole fractions between 373 and 514 µmol mol−1 and for sample H2O up to 3.5 %. As the calibration and standard gases are treated in the same manner, this error is mostly calibrated out with the residual error below the World Meteorological Organization’s (WMO) reproducibility requirements. Of more concern was the error associated with both default factory and empirical instrument specific water correction algorithms. These corrections are relatively stable and reproducible for samples with H2O between 0.2 and 2.5 %, CO2 between 345 and 449 µmol mol−1 and CH4 between 1743 and 2145 nmol mol−1. However, the residual errors in these corrections increase to > 0.05 µmol mol−1 for CO2 and > 1 nmol mol−1 for CH4 (greater than the WMO internal reproducibility guidelines) at higher humidities and for samples with very low (

scholarly journals Language Legislation and Policy in the uk and Ireland: Different Aspects of Territoriality in a ‘Celtic’ Context

2016 ◽  
Vol 23 (4) ◽  
pp. 454-484 ◽  
Author(s):  
Robert Dunbar
Keyword(s):  
United Kingdom ◽  
Language Policy ◽  
Indigenous Languages ◽  
Scottish Gaelic ◽  
The United Kingdom ◽  
Language Legislation ◽  
The Uk

In spite of the long-term dominance in Britain and Ireland of English, other indigenous languages continue to be spoken, and in relatively recent years several of those languages have benefited not only from a more coherent and supportive language policy but also from significant language legislation. One of the interesting features of these other indigenous languages is that, although strongly associated with rural ‘heartlands’ in the particular jurisdictions with which they are associated, they are also spoken in other parts of those jurisdictions, and, indeed, in other parts of the United Kingdom and Ireland. In this article, the ways in which the concept of territoriality has impacted upon legislation and on broader policy for two of these languages, Irish and Scottish Gaelic, will be considered.

scholarly journals Monitoring compliance with sulfur content regulations of shipping fuel by in situ measurements of ship emissions

2015 ◽  
Vol 15 (17) ◽  
pp. 10087-10092 ◽  
Author(s):  
L. Kattner ◽  
B. Mathieu-Üffing ◽  
J. P. Burrows ◽  
A. Richter ◽  
S. Schmolke ◽  
...  
Keyword(s):  
Sulfur Content ◽  
Air Pollutant ◽  
Monitoring Site ◽  
Data Set ◽  
The North ◽  
Position Data ◽  
Gas Measurements ◽  
Set Up ◽  
Carbon Dioxide Co2

Abstract. In 1997 the International Maritime Organisation (IMO) adopted MARPOL Annex VI to prevent air pollution by shipping emissions. It regulates, among other issues, the sulfur content in shipping fuels, which is transformed into the air pollutant sulfur dioxide (SO2) during combustion. Within designated Sulfur Emission Control Areas (SECA), the sulfur content was limited to 1 %, and on 1 January 2015, this limit was further reduced to 0.1 %. Here we present the set-up and measurement results of a permanent ship emission monitoring site near Hamburg harbour in the North Sea SECA. Trace gas measurements are conducted with in situ instruments and a data set from September 2014 to January 2015 is presented. By combining measurements of carbon dioxide (CO2) and SO2 with ship position data, it is possible to deduce the sulfur fuel content of individual ships passing the measurement station, thus facilitating the monitoring of compliance of ships with the IMO regulations. While compliance is almost 100 % for the 2014 data, it decreases only very little in 2015 to 95.4 % despite the much stricter limit. We analysed more than 1400 ship plumes in total and for months with favourable conditions, up to 40 % of all ships entering and leaving Hamburg harbour could be checked for their sulfur fuel content.

Transmission dynamics and mechanisms of endemicity of scrapie in the UK sheep population

2008 ◽  
Vol 137 (6) ◽  
pp. 762-774 ◽  
Author(s):  
J. E. TRUSCOTT ◽  
N. M. FERGUSON
Keyword(s):  
Structural Diversity ◽  
Epidemiological Data ◽  
Transmissible Spongiform Encephalopathies ◽  
Spongiform Encephalopathies ◽  
Sheep Population ◽  
Mean Values ◽  
The United Kingdom ◽  
The Family ◽  
The Uk

SUMMARYScrapie is a fatal neurological disease of sheep which is endemic in the United Kingdom. It is one of the family of transmissible spongiform encephalopathies (TSEs) that includes BSE. In this paper, we developed a micro-simulation model for scrapie in the UK sheep population, incorporating the genetic and structural diversity of the population and infectious contact between flocks through trading. The simulation was fitted to epidemiological data from a range of sources. We found a detection/reporting probability of 16% (95% CI 12–17) for animals dying of scrapie. Prevalence of infected animals in the population was about 0·15%. Infected individuals were found in 9% of flocks overall, rising to 60% in Shetland and 75% in Swaledale flocks. Mean values of R0 for flocks varied with breed from 2·43 (Shetland) to 0·21 (Suffolk). We also examined the possible long-term persistence of scrapie in the UK flock in the absence of any intervention.

scholarly journals Content analysis for <i>Agricultural Records</i> of the United Kingdom, AD 200 to 1977: a study of frequency in human records concerning climate phenomenon

2011 ◽  
Vol 7 (4) ◽  
pp. 2555-2577
Author(s):  
D. H. Holt
Keyword(s):  
Content Analysis ◽  
Ice Age ◽  
Climate Data ◽  
The United Kingdom ◽  
Weather Phenomenon ◽  
Continuous Record ◽  
Frequency Occurrence ◽  
The Uk ◽  
Climate Events

Abstract. A content analysis has been completed on a text from the UK that has gathered agricultural and climate data from the years AD 220 to 1977 from 100s of sources. The content analysis coded all references to climate and agriculture to ascertain which climate events were recorded and which were not. This study addressed the question: is there bias in human records of climate? This evaluated the continuous record (AD 1654–1977), discontinous record (AD 220–1653), the whole record (AD 220–1977), the Little Climate Optimum (AD 850–1250) and the Little Ice Age (AD 1450–1880). This study shows that there is no significant variation in any of these periods in frequency occurrence of "good" or "bad" climate suggesting humans are not recording long-term changes in climate, but they are recording weather phenomenon as it occurs.

scholarly journals A Comparative Survey Of Capital Investment Decision Practices In The United States And The United Kingdom

2011 ◽  
Vol 1 (11) ◽  
Author(s):  
Thomas Klammer ◽  
Neil Wilner ◽  
Jan Smolarski
Keyword(s):  
United States ◽  
Risk Management ◽  
United Kingdom ◽  
The United States ◽  
Capital Expenditures ◽  
The United Kingdom ◽  
Management Techniques ◽  
Comparative Survey ◽  
The Uk

Capital expenditures can be crucial to firms long-term success, especially in a complex global environment. As companies increasingly compete in the global market place, it is important to study project evaluation processes from an international perspective. Capital investments involve substantial monetary commitments and risks that affect long-term firm profitability and influence capital allocation decisions in the future. Survey research in the area of capital expenditure analysis has been extensively done in both the United States [US] and the United Kingdom [UK]. This research is the first comparative survey of practices in both countries that we are aware of. A direct comparison of the use of project evaluation, management science, and risk management techniques in the two countries is made. The survey instrument used is an adaptation of the Klammer [1970] instrument that has been used repeatedly in surveys of American firms. This is the first time that it has been applied to British firms. The use of a common instrument allows for more meaningful comparisons. The samples consisted of 127 American and 59 British firms with sales of at least $100 million and capital expenditures of at least $10 million. Preliminary results indicate a continued extensive use of discounted cash flow techniques by US firms. Techniques such as payback or urgency continue to be used, but to a lesser degree than discounting. Firms in the UK also make extensive use of discounting but do so to a lesser degree than their American counterparts. Payback is widely used in the UK. Risk management techniques are widely used in both countries, with sensitivity analysis being the most popular technique in both countries. Extensive use of technical and administrative procedures, such as detailed budgets, standardized forms and post-audits, are evidenced in both countries. The paper offers reasons that have to do with organizational structure and form, as well as market differences, to explain our results.

scholarly journals Heterogeneous Mental Health Development During the COVID-19 Pandemic in the United Kingdom

2021 ◽  
Author(s):  
Lea Ellwardt ◽  
Patrick Praeg
Keyword(s):  
United Kingdom ◽  
Psychological Distress ◽  
Latent Class ◽  
Mitigation Measures ◽  
Social Lives ◽  
The United Kingdom ◽  
Policy Measures ◽  
Nationally Representative ◽  
The Uk

Aim. The COVID-19 pandemic and the mitigation measures by governments have upended the economic and social lives of many, leading to widespread psychological distress. However, how distress developed during the pandemic and who was most affected is poorly understood. We explore heterogeneity in trajectories of psychological distress during the first six months of the pandemic in the United Kingdom and relate this heterogeneity to socio-demographic and health factors. Subjects and Methods. We analyze six waves of longitudinal, nationally representative survey data from the UK Household Longitudinal Study (N = 15,218), covering the first lockdown in 2020. First, latent class mixture modelling (LCCM) is used to identify trajectories of psychological distress. Second, associations of the trajectories with covariates are tested with multinomial logistic regressions. Results. We find four different trajectories of distress: continuously low, continuously moderate, temporarily elevated, and continuously elevated distress. One-fifth of the population experienced severely elevated risks of distress. Long-term exposure was highest among younger people, women, those who lost income, and those with previous health conditions or COVID-19 symptoms. Conclusion. Given the threat of persistent stress on health, policy measures should be sensitized to the unintended yet far-reaching consequences of non-pharmaceutical interventions.

The Importance of Convention Status: A Case Study of the UK

2001 ◽  
Vol 6 (1) ◽  
pp. 15-24 ◽  
Author(s):  
Alice Bloch
Keyword(s):  
Asylum Seekers ◽  
Economic Rights ◽  
The United Kingdom ◽  
The Social ◽  
The Status ◽  
The Uk ◽  
Refugees And Asylum Seekers ◽  
Social And Economic Rights

Convention status accords refugees social and economic rights and security of residence in European countries of asylum. However, the trend in Europe has been to prevent asylum seekers reaching its borders, to reduce the rights of asylum seekers in countries of asylum and to use temporary protection as a means of circumventing the responsibility of long-term resettlement. This paper will provide a case study of the United Kingdom. It will examine the social and economic rights afforded to different statuses in the areas of social security, housing, employment and family reunion. It will explore the interaction of social and economic rights and security of residence on the experiences of those seeking protection. Drawing on responses to the crisis in Kosovo and on data from a survey of 180 refugees and asylum seekers in London it will show the importance of Convention status and the rights and security the status brings.

The French sheep industry from farm to table

1990 ◽  
Vol 14 ◽  
pp. 39-43
Author(s):  
J. Barber
Keyword(s):  
Point Of View ◽  
Market Potential ◽  
High Price ◽  
Flock Size ◽  
The United Kingdom ◽  
High Street ◽  
Sheep Production ◽  
The Uk ◽  
Economic Constraints

AbstractLamb is perceived in an excellent manner in France, conjuring up the image of ‘feast day meat’, which is ‘natural’, mixed with a ‘regional flavour’. Historically lamb in France has been regarded as a meat for special occasions and has carried a high price tag. This price tag is less expensive than it used to be, especially with supermarkets and hypermarkets taking between 50 and 60% of the retail market. Lamb meat is now available to all at a (relatively) low price; a meat which is still regarded as ‘special’.Lamb consumption is increasing in France; in 1988 by an estimated 4%. This is largely due to price, good marketing and very good presentation — in the supermarkets, by top quality high-street butchers and in older traditional country markets. Consumption of lamb has increased by approximately 85 000 t in the last 15 years. French production has been decreasing by about 4% per year over recent years, and France imported 63 500 t in 1984 of which 36 000 came from the United Kingdom (UK). In 1987, 108 200 t were imported, of which 60 000 t came from the UK.There is a greater market potential for lamb in France than her producers can provide. One reason for this is that there are 190 000 producers with 8.15 million ewes; an average flock size of 42. This compares with the UK which has less than half the number of producers, with double the numbers of breeding sheep, and an average flock size nearly five times the size of French flocks.From the long-term point of view, not only is a large number of the flocks too small to be viable in competition with UK producers in the European Community but a high proportion of flock owners tend to be elderly. Sheep production is taking place in areas which are difficult to farm and on small units which are difficult to expand, either because of land law restriction or through economic constraints.

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