G. Billen

Publications360
h-index82
Citations23,809
Highly Influential Citations1,226
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Regional nitrogen budgets and riverine N & P fluxes for the drainages to the North Atlantic Ocean: Natural and human influences
We present estimates of total nitrogen and total phosphorus fluxes in rivers to the North Atlantic Ocean from 14 regions in North America, South America, Europe, and Africa which collectively… Expand
Human alteration of the global nitrogen and phosphorus soil balances for the period 1970–2050
[1] The Millennium Ecosystem Assessment scenarios for 2000 to 2050 describe contrasting future developments in agricultural land use under changing climate. Differences are related to the total crop… Expand
Nitrogen retention in rivers: model development and application to watersheds in the northeastern U.S.A.
A regression model (RivR-N) was developed that predicts the proportion of N removed from streams and reservoirs as an inverse function of the water displacement time of the water body (ratio of water… Expand
The fate of nitrogen and phosphorus at the land-sea margin of the North Atlantic Ocean
Five large rivers that discharge on the western North Atlantic continental shelf carry about 45% of the nitrogen (N) and 70% of the phosphorus (P) that others estimate to be the total flux of these… Expand
The fate of nitrogen and phosphorus at the land-sea margin of the North Atlantic Ocean
Five large rivers that discharge on the western North Atlantic continental shelf carry about 45% of the nitrogen (N) and 70% of the phosphorus (P) that others estimate to be the total flux of these… Expand
Nitrous oxide emissions from secondary activated sludge in nitrifying conditions of urban wastewater treatment plants: effect of oxygenation level.
TLDR
It is shown that ammonium oxidizing bacteria (AOB) can shift to nitrifier denitrification when oxygen is depleted in the environments including in the WWTPs, nitrite then plays the role of oxygen as the final electron acceptor. Expand
The European Nitrogen Assessment: Sources, Effects and Policy Perspectives
List of contributors Preface Summary for policymakers Technical summary 1. Assessing our nitrogen inheritance Part I. Nitrogen in Europe: The Present Position: 2. The European nitrogen problem in a… Expand
Phaeocystis blooms and nutrient enrichment in the continental coastal zones of the North sea
With increasing frequency over the past 20 years, generally during the second half of June, Dutch and German beaches were covered with a massive layer, up to 2 m thick, of the alga Phaeocystis… Expand
50 year trends in nitrogen use efficiency of world cropping systems: the relationship between yield and nitrogen input to cropland
Nitrogen (N) is crucial for crop productivity. However, nowadays more than half of the N added to cropland is lost to the environment, wasting the resource, producing threats to air, water, soil and… Expand
Global river nutrient export: A scenario analysis of past and future trends
[1] An integrated modeling approach was used to connect socioeconomic factors and nutrient management to river export of nitrogen, phosphorus, silica and carbon based on an updated Global NEWS model.… Expand
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