Impacts of anthropogenic SOx, NOx and NH3 on acidification of coastal waters and shipping lanes

2011-07-07
Hunter, Keith A.
Liss, Peter S.
Surapipith, Vanisa
Dentener, Frank
Duce, Robert
Kanakidou, Maria
Kubilay, Nilgun
Mahowald, Natalie
Okin, Greg
Sarin, Manmohan
Uematsu, Mitsuo
Zhu, Tong
The acidification of the ocean by anthropogenic CO2 absorbed from the atmosphere is now well-recognized and is considered to have lowered surface ocean pH by 0.1 since the mid-18th century. Future acidification may lead to undersaturation of CaCO3 making growth of calcifying organisms difficult. However, other anthropogenic gases also have the potential to alter ocean pH and CO2 chemistry, specifically SOx and NOx and NH3. We demonstrate using a simple chemical model that in coastal water regions with high atmospheric inputs of these gases, their pH reduction is almost completely canceled out by buffering reactions involving seawater HCO3- and CO32- ions. However, a consequence of this buffering is a significant decrease in the uptake of anthropogenic CO2 by the atmosphere in these areas. Citation: Hunter, K. A., et al. (2011), Impacts of anthropogenic SOx, NOx and NH3 on acidification of coastal waters and shipping lanes, Geophys. Res. Lett., 38, L13602, doi: 10.1029/2011GL047720.
GEOPHYSICAL RESEARCH LETTERS

Suggestions

Impact of alternating wet and dry periods on long-term seasonal phosphorus and nitrogen budgets of two shallow Mediterranean lakes
Coppens, Jan; ÖZEN, ARDA; Tavsanoglu, U. Nihan; Erdogan, Seyda; Levi, Eti E.; Yozgatlıgil, Ceylan; Jeppesen, Erik; Beklioğlu, Meryem (2016-09-01)
The water balance, with large seasonal and annual water level fluctuations, has a critical influence on the nitrogen and phosphorus dynamics of shallow lakes in the semi-arid climate zone. We constructed seasonal water and nutrient budgets for two connected shallow lakes, Lakes Mogan and Eymir, located in Central Anatolia, Turkey. The study period covered 20 years with alternations between dry and wet years as well as restoration efforts including sewage effluent diversion and biomanipulations in Lake Eymir...
Effects of Harbor Shape on the Induced Sedimentation; L-Type Basin
Kian, Rozita; Velioglu, Deniz; Yalçıner, Ahmet Cevdet; Zaytsev, Andrey (2016-09-01)
Tsunamis in shallow water zones lead to sea water level rise and fall, strong currents, forces (drag, impact, uplift, etc.), morphological changes (erosion, deposition), dynamic water pressure, as well as resonant oscillations. As a result, ground materials under the tsunami motion move, and scour/erosion/deposition patterns can be observed in the region. Ports and harbors as enclosed basins are the main examples of coastal structures that usually encounter natural hazards with small or huge damaging scales...
Impacts of atmospheric nutrient deposition on marine productivity: Roles of nitrogen, phosphorus, and iron
Okin, Gregory S.; Baker, Alex R.; Tegen, Ina; Mahowald, Natalie M.; Dentener, Frank J.; Duce, Robert A.; Galloway, James N.; Hunter, Keith; Kanakidou, Maria; Kubilay, Nilgun; Prospero, Joseph M.; Sarin, Manmohan; Surapipith, Vanisa; Uematsu, Mitsuo; Zhu, Tong (American Geophysical Union (AGU), 2011-06-23)
Nutrients are supplied to the mixed layer of the open ocean by either atmospheric deposition or mixing from deeper waters, and these nutrients drive nitrogen and carbon fixation. To evaluate the importance of atmospheric deposition, we estimate marine nitrogen and carbon fixation from present-day simulations of atmospheric deposition of nitrogen, phosphorus, and iron. These are compared with observed rates of marine nitrogen and carbon fixation. We find that Fe deposition is more important than P deposition...
Effects of Nutrient Management Scenarios on Marine Food Webs: A Pan-European Assessment in Support of the Marine Strategy Framework Directive
Piroddi, Chiara; et. al. (2021-03-01)
Eutrophication is one of the most important anthropogenic pressures impacting coastal seas. In Europe, several legislations and management measures have been implemented to halt nutrient overloading in marine ecosystems. This study evaluates the impact of freshwater nutrient control measures on higher trophic levels (HTL) in European marine ecosystems following descriptors and criteria as defined by the Marine Strategy Framework Directive (MSFD). We used a novel pan-European marine modeling ensemble of four...
Influence of Farming Intensity and Climate on Lowland Stream Nitrogen
Goyenola, Guillermo; Graeber, Daniel; Meerhof, Mariana; Jeppesen, Erik; Teixeira-de Mello, Franco; Vidal, Nicolás; Fosalba, Claudia; Ovesen, Niels Bering; Gelbrecht, Joerg; Mazzeo, Néstor; Kronvang, Brian (MDPI AG, 2020-4-2)
Nitrogen lost from agriculture has altered the geochemistry of the biosphere, with pronounced impacts on aquatic ecosystems. We aim to elucidate the patterns and driving factors behind the N fluxes in lowland stream ecosystems differing about land-use and climatic-hydrological conditions. The climate-hydrology areas represented humid cold temperate/stable discharge conditions, and humid subtropical climate/flashy conditions. Three complementary monitoring sampling characteristics were selected, including a ...
Citation Formats
K. A. Hunter et al., “Impacts of anthropogenic SOx, NOx and NH3 on acidification of coastal waters and shipping lanes,” GEOPHYSICAL RESEARCH LETTERS, pp. 0–0, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/68584.