نتایج جستجو برای: dry deposition
تعداد نتایج: 182406 فیلتر نتایج به سال:
Pollutants deposited on road surfaces and distributed in the environment are a source of nonpoint pollution. Field data are traditionally hard to collect from roads because of constant traffic. In this study, in cooperation with the traffic administration, the dry deposition on and road runoff from urban roads was measured in Taipei City and New Taipei City, Taiwan. The results showed that the ...
[1] Aeolian dust input may be a critical source of dissolved iron for phytoplankton growth in some oceanic regions. We used an atmospheric general circulation model (GCM) to simulate dust transport and removal by dry and wet deposition. Model results show extremely low dust concentrations over the equatorial Pacific and Southern Ocean. We find that wet deposition through precipitation scavengin...
Dry deposition of peroxyacetyl nitrate (PAN) is known to have a phytotoxic impact on plants under photochemical smog conditions, but it may also lead to higher productivity and threaten species richness of vulnerable ecosystems in remote regions. However, underlying mechanisms or controlling factors for PAN deposition are not well understood and studies on dry deposition of PAN are limited. In ...
Increases in reactive nitrogen deposition are a growing concern in the U.S. Rocky Mountain west. The Rocky Mountain Airborne Nitrogen and Sulfur (RoMANS) study was designed to improve understanding of the species and pathways that contribute to nitrogen deposition in Rocky Mountain National Park (RMNP). During two 5-week field campaigns in spring and summer of 2006, the largest contributor to r...
While recent scientific advances have improved our understanding of the fundamental chemistry of mercury (Hg) in the environment, important components of the global Hg budget remain uncertain. Understanding exchange between atmospheric Hg and the terrestrial surface is critical to understanding the fate of anthropogenic Hg inputs in the environment, because the terrestrial surface re-emits hist...
یکی از مهمترین علت های ایجاد کننده درد، اختلالات اسکلتی-عضلانی می باشد، که حدود یک سوم آنها دارای سندرم میوفاشیال همراه با نقاط ماشه ای می باشند. وجود نقطه ماشه ای در عضله تراپز فوقانی یکی از یافته های شایع در افراد مبتلا به اختلالات ناحیه گردن و پشت است. اخیرا استفاده از dry needling به عنوان یکی از روشهای جدید درمانی جهت درمان نقاط ماشه ای مطرح شده است. هدف از این مطالعه بررسی اثرات دو روش در...
A multi-layer ozone (O3) dry deposition model has been implemented into SOSAA (a model to Simulate the concen-trations of Organic vapours, Sulphuric Acid and Aerosols) to improve the representation of O3 concentration and flux withinand above the forest canopy in the planetary boundary layer. We aim to predict the O3 uptake by a boreal forest canopy undervarying environmental condit...
Biogeochemical responses to changing climate and atmospheric deposition were investigated using nitrogen (N) and sulfur (S) mass balances, including dry deposition and organic solutes in the Arbutus Lake watershed in the Adirondack Mountains, New York State. Long-term monitoring of wet-only precipitation (NADP/NTN, 1983–2001) and dry deposition (AIRMoN, 1990–2001) at sites adjacent to the water...
[1] Atmospheric deposition is an important source of nutrients to the coastal and open ocean; however, its role in highly productive upwelling regions like coastal California has not been determined. Approximately 0.1%–0.2% of new production is attributable to atmospheric deposition of nitrogen (N) annually, but if the estimate is expanded to encompass the effects of iron (Fe), aerosols may sup...
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