Call number:
ZSP-201-89/25
In:
CRREL Report, 89-25
Description / Table of Contents:
This study provides a detailed chemical and structural profile of first-year and multiyear Arctic sea ice. Ice cores were collected during April- May 1986 and 1987 near Prudhoe Bay, Alaska. Concentrations of Cl, Br, SO4, Na, Ca, K, Mg, PO4, SiO4, NO3, NO2 and NH4 were determined for samples chosen on the basis of structural ice type. Chemical and statistical analyses indicate that finer-grained structures incorporate more impurities and that major ion chemistry is controlled almost entirely by salinity. Mg is enriched in the ice indicating precipitation is occurring at temperatures higher than previously reported. K is depleted in the ice suggesting preferrential drainage. Ratios of the major ions are the same for first-year and multiyear ice and are similar to that of seawater indicating that as the ice ages no significant changes occur in ice chemistry. Nutrient concentrations in the ice are enriched with respect to the underlying water, indicating that biological activity occurs in the ice and processes other than the overall salinity effect and brine drainage are affecting nutrient concentrations within the ice.
Type of Medium:
Series available for loan
Pages:
vi, 144 Seiten
,
Illustrationen
Series Statement:
CRREL Report 89-25
URL:
https://apps.dtic.mil/dtic/tr/fulltext/u2/a219746.pdf
URL:
https://hdl.handle.net/11681/9097
Language:
English
Note:
CONTENTS
Abstract
Preface
Introduction
Background
Formation, growth, and structure of sea ice
Oceanic frazil production
Multiyear ice
Equilibrium growth
Summer ice decay
Annual layering
Salinity distribution in sea ice
Chemistry of sea ice
Study area description
Objectives
Methodology
Sample collection
Blanks
Chemical analyses
Thin sections
Data reduction
Results and discussion
First-year ice
Multiyear ice
Comparison of first-year and multiyear ice
Summary
Conclusions
Future work
References
Appendix A: Concentration of chemical species in sea ice as reported in the literature
Appendix B: Ice and water data
Appendix C: Linear regression data
Location:
AWI Archive
Branch Library:
AWI Library
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