The Asian summer monsoon (ASM) is a vast climate system, whose variability is critical to
the livelihoods of billions of people across the Asian continent. During the past half-century …

Twenty years ago, measurements on ice cores showed that the concentration of carbon
dioxide in the atmosphere was lower during ice ages than it is today. As yet, there is no …

This paper contrasts the natural and anthropogenic controls on the conversion of unreactive
N 2 to more reactive forms of nitrogen (Nr). A variety of data sets are used to construct global …

This report is the first complete assessment of the science of climate change since Working
Group I (WGI) of the IPCC produced its second report Climate Change 1995: The Science of …

The concentration of CO2 in the atmosphere has risen from close to 280 parts per million
(ppm) in 1800, at first slowly and then progressively faster to a value of 367 ppm in 1999 …

Over geological time, photosynthetic carbon fixation in the oceans has exceeded respiratory
oxidation of organic carbon. The imbalance between the two processes has resulted in the …

This third edition of Reconstructing Quaternary Environments has been completely revised
and updated to provide a new account of the history and scale of environmental changes …

Recent studies have shown the utility of delta (15) N to model trophic structure and
contaminant bioaccumulation in aquatic food webs. However, cross-system comparisons in …

Denitrification, the reduction of the nitrogen (N) oxides, nitrate (NO3−) and nitrite (NO2−), to
the gases nitric oxide (NO), nitrous oxide (N2O), and dinitrogen (N2), is important to primary …

The carbon and nitrogen isotope composition of organic matter has been widely used to
trace biogeochemical processes in marine and lacustrine environments. In order to …