The spatial glaciochemical variability of snow samples collected along a transect from Zhongshan Station to Lambert Glacier Basin 69 (LGB69) in Antarctica was investigated. Sea-salt ion concentrations exponentially decreased with increasing distance from the coast and/or altitude. The observed high sea-salt ion concentrations within 20.6 km of the coast may be related to preferential wet or dry deposition of sea-salt aerosols. Methanesulfonic acid (MSA), non-sea-salt sulfate (nssSO42−), and calcium (Ca2+) concentrations decreased along the transect. The mean MSA/nssSO42− value of the surface snow samples (0.34 ± 0.08) indicates that coastal sea areas are their likely source regions. The non-sea-salt Ca2+ (nssCa2+)/Ca2+ percentages of the surface snow and LGB69 snow pit samples reveal that continental dust is the primary Ca2+ source. The δD and δ18O values decreased from the coast inland. The variation of deuterium excess (d-excess) along the transect was stable and d-excess values in the two snow pit samples were low and similar, which indicates that the moisture source region between Zhongshan Station and LGB69 is a coastal sea area. These results reveal the spatial distribution patterns and sources of ions and stable isotopes, as well as factors that influence the deposition of ions and the composition of stable isotopes, which provide important insight for further studies of ice cores drilled in Antarctic coastal regions.
Cotton is a graduate of Clarkson University and earned a Masters in Business Administration from the University of Vermont. He is a Chartered Financial Analyst (CFA), a Certified Public Accountant (CPA), a Certified Treasury Professional (CTP), a Fellow of the Life Management Institute (FLMI), a member of the Association of Financial Professionals, the LOMA Treasury Committee, the New York State Society of CPAs, the Vermont Society of CPAs, and the Vermont Security Analysts Society. He is a resident of Williston, Vermont. In his new post Cotton, who joined National Life in 1993, will be responsible for all financial operations of National Life Group, a Fortune 1000 company with $29 billion in assets under management. He will also work with Assadi on strategy and business development. The companies of National Life Group offer life insurance, annuities, and investment* products and services. National Life Group,Bob Cotton has been appointed chief financial officer and senior vice president of National Life Group, it was announced today by Mehran Assadi, president and chief executive officer. ‘This is an exciting time for National Life Group,’ said Cotton. ‘We are a very strong company with a strategic plan that is designed to make us even stronger. I am incredibly honored to be working with Mehran on executing this strategy.’ Prior to joining National Life, he served as an accounting manager at Library Bureau, Inc., and before that as a senior accountant at Coopers & Lybrand. Commenting on the appointment, Assadi said, ‘Bob’s deep knowledge of National Life Group and his broad familiarity with the entire financial services industry will be of tremendous value as we execute our plans for the future. As the leader of our companywide initiative to craft a new three-year strategic plan Bob brought energy and focus that helped us develop a clear direction for our future.’ Cotton began his career with the company as a staff auditor. He steadily assumed positions of greater responsibility and served as the company’s treasurer for six years before his appointment in January as senior vice president for finance.