The impact of anthropogenic chlorine, stratospheric ozone change and chemical feedbacks on stratospheric water T. Röckmann, J.-U. Grooß, and R. Müller Max-Planck-Institut für Kernphysik, Bereich Atmosphärenphysik, 69117 Heidelberg, Germany Institut für Chemie und Dynamik der Geosphäre, Forschungszentrum Jülich, 52425 Jülich, Germany Received: 17 December 2003 – Accepted: 3 February 2004 – Publi...

Hydroxylated polybrominated diphenyl ethers (OH-BDEs) are a new class of contaminants of emerging concern, but the relative roles of natural and anthropogenic sources remain uncertain. Polybrominated diphenyl ethers (PBDEs) are used as brominated flame retardants, and they are a potential source of OH-BDEs via oxidative transformations. OH-BDEs are also natural products in marine systems. In th...

Recent climate reconstructions are analyzed specifically for insights into those patterns of climate variability in past centuries with greatest impact on the North American region. Regional variability, largely associated with the El Nino/Southern Oscillation (ENSO) phenomenon, the North Atlantic Oscillation (NAO), and multidecadal patterns of natural variability, are found to mask the emergen...

by Pavel Povinec, Scott Fowler, and Murdoch Baxter I he Chernobyl nuclear accident in April 1986 had a significant impact on both the terrestrial and marine environments. The total activity of the nuclear debris released was so high (1-2.10 becquerel) that the radioactive fallout distributed widely after the accident actually dominated anthropogenic environmental levels in various parts of the ...

Anthropogenic noise is now recognized as a major global pollutant. Rapidly burgeoning research has identified impacts on individual behaviour and physiology through to community disruption. To date, however, there has been an almost exclusive focus on vertebrates. Not only does their central role in food webs and in fulfilling ecosystem services make imperative our understanding of how inverteb...

The long-term goal of our research is to develop algorithms that use widely spaced hydrophone arrays to localize and track multiple unknown sound sources, possibly in shallow-water environments, over long distances. By developing methods to simultaneously track multiple vocalizing marine mammals, we hope to contribute to the fields of marine mammal bioacoustics, ecology, and anthropogenic impac...

[1] The migration of enhancements in NO2 concentration, outgoing longwave radiation (OLR), and radiative effects associated with the onset of the North American Monsoon in July 2005 has been investigated using satellite data and the Regional Chemical Transport Model (REAM). The satellite data include the tropospheric NO2 columns, tropospheric O3 profiles, and OLR from OMI, TES and NOAA-16 satel...