On the fate of anthropogenic nitrogen Export

@article{citeulike:5106085, abstract = {10.1073/pnas.0810193105 This article provides a synthesis of literature values to trace the fate of 150 Tg/yr anthropogenic nitrogen applied by humans to the Earth's land surface. Approximately 9 TgN/yr may be accumulating in the terrestrial biosphere in pools with residence times of ten to several hundred years. Enhanced fluvial transport of nitrogen in rivers and percolation to groundwater accounts for \^{a}‰ˆ35 and 15 TgN/yr, respectively. Greater denitrification in terrestrial soils and wetlands may account for the loss of \^{a}‰ˆ17 TgN/yr from the land surface, calculated by a compilation of data on the fraction of NO emitted to the atmosphere and the current global rise of this gas in the atmosphere. A recent estimate of atmospheric transport of reactive nitrogen from land to sea (NO and NH) accounts for 48 TgN/yr. The total of these enhanced sinks, 124 TgN/yr, is less than the human-enhanced inputs to the land surface, indicating areas of needed additional attention to global nitrogen biogeochemistry. Policy makers should focus on increasing nitrogen-use efficiency in fertilization, reducing transport of reactive N to rivers and groundwater, and maximizing denitrification to its N endproduct.}, author = {Schlesinger, William H.}, citeulike-article-id = {5106085}, citeulike-linkout-0 = {http://dx.doi.org/10.1073/pnas.0810193105}, citeulike-linkout-1 = {http://www.pnas.org/content/106/1/203.abstract}, citeulike-linkout-2 = {http://www.pnas.org/content/106/1/203.full.pdf}, citeulike-linkout-3 = {http://view.ncbi.nlm.nih.gov/pubmed/19118195}, citeulike-linkout-4 = {http://www.hubmed.org/display.cgi?uids=19118195}, day = {6}, doi = {10.1073/pnas.0810193105}, journal = {Proceedings of the National Academy of Sciences}, keywords = {nitrogen}, month = {January}, number = {1}, pages = {203--208}, posted-at = {2009-11-12 14:35:36}, priority = {0}, title = {On the fate of anthropogenic nitrogen}, url = {http://dx.doi.org/10.1073/pnas.0810193105}, volume = {106}, year = {2009} }

TY - JOUR ID - citeulike:5106085 L3 - citeulike-article-id:5106085 N2 - 10.1073/pnas.0810193105 This article provides a synthesis of literature values to trace the fate of 150 Tg/yr anthropogenic nitrogen applied by humans to the Earth's land surface. Approximately 9 TgN/yr may be accumulating in the terrestrial biosphere in pools with residence times of ten to several hundred years. Enhanced fluvial transport of nitrogen in rivers and percolation to groundwater accounts for ≈35 and 15 TgN/yr, respectively. Greater denitrification in terrestrial soils and wetlands may account for the loss of ≈17 TgN/yr from the land surface, calculated by a compilation of data on the fraction of NO emitted to the atmosphere and the current global rise of this gas in the atmosphere. A recent estimate of atmospheric transport of reactive nitrogen from land to sea (NO and NH) accounts for 48 TgN/yr. The total of these enhanced sinks, 124 TgN/yr, is less than the human-enhanced inputs to the land surface, indicating areas of needed additional attention to global nitrogen biogeochemistry. Policy makers should focus on increasing nitrogen-use efficiency in fertilization, reducing transport of reactive N to rivers and groundwater, and maximizing denitrification to its N endproduct. IS - 1 JF - Proceedings of the National Academy of Sciences EP - 208 TI - On the fate of anthropogenic nitrogen VL - 106 SP - 203 KW - nitrogen AU - Schlesinger, William PY - 2009/01/06/ UR - http://dx.doi.org/10.1073/pnas.0810193105 ER -