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 …

Nitrogen isotope compositions in sedimentary rocks (d 15 N sed) are routinely used for
reconstructing Cenozoic N-biogeochemical cycling and are also being increasingly applied …

Current chemostratigraphical studies of the Jurassic System primarily involve the use of one
sedimentary component (marine organic carbon), one divalent transition metal substituted in …

The late Pleistocene history of seawater temperature and salinity variability in the western
tropical Pacific warm pool is reconstructed from oxygen isotope (δ18O) and …

A nitrogen stable isotopic model was constructed in order to constrain the Holocene marine‐
fixed nitrogen budget. The primary sources and sinks considered were riverine and …

The bioavailability of nutrients represents one of the most important factors controlling the
strength of the biological carbon pump and ultimately the impact of ocean biology on …

We analyzed the stable nitrogen isotope composition of an extensive set of samples of
particulate matter (PM) and seawater nitrate collected during October/November 1997 along …

Over the last 30 years, immense progress has been made in understanding the global
significance of marine nitrogen (N~ 2~) fixation. Development of enzymological, isotopic and …

Bulk sedimentary nitrogen isotope (δ15Ntot) data have been generated from Lower Jurassic
black, carbon‐rich shales in the British Isles and northern Italy deposited during the early …

The late Quaternary history of water‐column denitrifcation of the eastern Pacific margins and
the Arabian Sea is reconstructed using sedimentary δ15N measurements. The δ15N values …