Anderson, S. P., J. I. Drever, C. D. Frost, and P. Holden. 2000. Chemical weathering in the foreland of a retreating glacier. Geochimica Et Cosmochimica Acta 64: 1173-1189.

This article focused on studying weathering effects of young glaciers by looking at strontium isotope ratios. 90% of the flux from the young sediments was from carbonate dissolution and sulfide oxidation. To account for the atmospheric additions to the sediments, grab samples were taken off the glaciers themselves, but this method may not have been adequate to account for the atmospheric sediments found in front of the receding glacier. The annual stream discharge rate is also important to know and sometimes difficult to estimate on the smaller streams. The study found that cation denudation was 3 to 4 times higher in the glacier area than what was coming from the glacier itself. Weathering of the sediments is dominated by carbonate dissolution and silicate weathering does not occur until the carbonate source is depleted.

Zhang, J. R., and P. D. Quay. 1997. The total organic carbon export rate based on C-13 and C-12 of DIC budgets in the equatorial Pacific region. Deep-Sea Research Part Ii-Topical Studies In Oceanography 44: 2163-2190.

Studying dissolved inorganic carbon (DIC) and its 13C isotopic ratios is a way of determining export of organic carbon from the mixed layer. This study focused on export of organic carbon from the mixed layer during the 1992 El Nino season in the equatorial Pacific. This paper is much more relevant to my research since I will also be measuring total DIC concentration and analyzing the 13C/12C ratios. While I will be more concerned about surface levels of DIC and full water column isotope ratios to meet my research goals, the methods used in this study are highly relevant to me. The parts about the air-sea exchange of carbon are useful since part of my project will be determining the nature of the CO2 gradient between the surface waters and the atmosphere. During the El Nino in the equatorial pacific, the carbon evasion between air and sea averaged 1.6 mmol C per m^2 per day. Glacier Bay has much different water conditions, but it is still valuable to know rates from other areas of the world.

These two papers are not very related to each other, but were chosen because one of them focuses on the type of measurements I will be taking and the other deals with sediments from glaciers. Many of the sediments from glacier runoff eventually end up in the bay, and these effect the isotopic ratio of the carbon found in the water. The DIC paper establishes testing methods and at least a scale for the data to expect from the air-sea CO2 exchange rate. Both papers were chosen early, and the idea for my project changed and became more focused since choosing the papers. If I were to redo this assignment, I would not have chosen the first paper since it is not closely related to my own, other than the location.

2163-2190.