Product Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2005. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
We present in this study both measurement-based and modeling analyses for elucidation of source attribution, influence areas, and process budget of reactive nitrogen oxides at two rural southeast United States sites (Great Smoky Mountains national park (GRSM) and Mammoth Cave national park (MACA)). Availability of nitrogen oxides is considered as the limiting factor to ozone production in these areas and the relative source contribution of reactive nitrogen oxides from point or mobile sources is important in understanding why these areas have high ozone. Using two independent observation-based techniques, multiple linear regression analysis and emission inventory analysis, we demonstrate that point sources contribute a minimum of 23% of total NO"y at GRSM and 27% at MACA. The influence areas for these two sites, or origins of nitrogen oxides, are investigated using trajectory-cluster analysis. The result shows that air masses from the West and Southwest sweep over GRSM most frequently, while pollutants transported from the eastern half (i.e., East, Northeast, and Southeast) have limited influence (<10% out of all air masses) on air quality at GRSM. The processes responsible for formation and removal of reactive nitrogen oxides are investigated using a comprehensive 3-D air quality model (Multiscale Air Quality SImulation Platform (MAQSIP)). The NO"y contribution associated with chemical transformations to NO"z and O"3, based on process budget analysis, is as follows: 32% and 84% for NO"z, and 26% and 80% for O"3 at GRSM and MACA, respectively. The similarity between NO"z and O"3 process budgets suggests a close association between nitrogen oxides and effective O"3 production at these rural locations. ... Read more

Product Description
This digital document is a journal article from Atmospheric Environment, published by Elsevier in 2004. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
In airsheds that contain high volatile organic compounds (VOCs) and low NO"x (=NO+NO"2) concentrations, ozone (O"3) production may be significantly suppressed by NO"x reactions that lead to the formation of organic nitrates. O"3 and its precursors (VOCs and NO"x) ambient levels simulated using a regional-scale photochemical model, called Multiscale Air Quality Simulation Platform, are analyzed and compared to observed data from three southeast United States national parks. ... Read more

Product Description
The Ray Number 19 (Monster 3)ASIN: B001HFC70ITitle: The Ray Number 19Binding: ComicPublication date: 1995 ... Read more

Product Description
This digital document is an article from Semana, published by Spanish Publications, Inc. on September 20, 2002. The length of the article is 515 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.

Citation Details
Title: Buenos y malos se enfrentan.(Ballistic: Ecks vs. Sever)(TT: Good and bad confront.)(TA: Ballistic: Ecks vs. Sever)(Reseña)
Publication: Semana (Magazine/Journal)
Date: September 20, 2002
Publisher: Spanish Publications, Inc.
Volume: 8Issue: 499Page: 30(1)

Article Type: Reseña

Distributed by Thomson Gale ... Read more

Product Description
A pack containing five copies of one of a series of special-needs readers. ... Read more

Product Description
A pack containing five copies of one of a series of special-needs readers. ... Read more