Human activities have already modified the chemical composition of the natural atmosphere
even in very remote regions of the world. The study of chemical parameters stored in solid …

It has been shown that sunlit snow and ice plays an important role in processing
atmospheric species. Photochemical production of a variety of chemicals has recently been …

The Arctic region is a harbinger of global change and is warming at a rate higher than the
global average. While Arctic warming is driven by increases in anthropogenic greenhouse …

The soils of the Atacama Desert in northern Chile have long been known to contain large
quantities of unusual salts, yet the processes that form these soils are not yet fully …

Annual layers are visible in the Greenland Ice Sheet Project 2 ice core from central
Greenland, allowing rapid dating of the core. Changes in bubble and grain structure caused …

Vertical gradients of NOx, HONO, and HNO3 were measured in the lower 1–2 m above the
snowpack at Summit, Greenland, during summer 2000. These measurements are used with …

Abstract The Northern Hemisphere experienced dramatic changes during the last glacial,
featuring vast ice sheets and abrupt climate events, while high northern latitudes during the …

Ion chromatography (IC), first developed in the mid-1970s by Small et al.(1975), is a physio-
chemical separation technique that provides quantitative analysis of inorganic and organic …

A dry deposition scheme, originally developed to calculate the deposition velocities for the
trace gases O3, NO2, NO, and HNO3 in the chemistry and general circulation European …

Nitrogen and oxygen isotopes of NO3− have been measured in snow and firn from Summit,
Greenland. The 15N/14N and 18O/16O ratios of NO3− in recently fallen snow are similar to …