東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Ion concentrations in atmospheric ae...

Fosco, Tinamarie.

Linked to FindBook

Google Book

Amazon

博客來

Ion concentrations in atmospheric aerosols: The influence of nitrogen oxides and ozone mixing ratios, local meteorology, and the lake breeze in Chicago, Illinois.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Ion concentrations in atmospheric aerosols: The influence of nitrogen oxides and ozone mixing ratios, local meteorology, and the lake breeze in Chicago, Illinois./
Author:	Fosco, Tinamarie.
Description:	149 p.
Notes:	Adviser: Martina Schmeling.
Contained By:	Dissertation Abstracts International67-04B.
Subject:	Chemistry, Analytical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3212961
ISBN:	9780542629341

Ion concentrations in atmospheric aerosols: The influence of nitrogen oxides and ozone mixing ratios, local meteorology, and the lake breeze in Chicago, Illinois.
Fosco, Tinamarie.

Ion concentrations in atmospheric aerosols: The influence of nitrogen oxides and ozone mixing ratios, local meteorology, and the lake breeze in Chicago, Illinois. - 149 p.

Adviser: Martina Schmeling.

Thesis (Ph.D.)--Loyola University Chicago, 2006.

Aerosols adversely affect local air quality and impact human health and climate. This is especially true of aerosols composed of sulfate and nitrate, which can form within the atmosphere through reactions involving the trace gases NOx (NO2 + NO) and ozone. The presence of these species in Chicago is not only dependent on vehicular and industrial emissions, but also on local meteorology including the lake breeze. The lake breeze allows air masses containing precursor pollutants residing above Lake Michigan to return back to the city possibly leading to increased pollution levels.

ISBN: 9780542629341Subjects--Topical Terms:

586156
Chemistry, Analytical.

Ion concentrations in atmospheric aerosols: The influence of nitrogen oxides and ozone mixing ratios, local meteorology, and the lake breeze in Chicago, Illinois.
LDR:03596nam 2200325 a 45 001 948522
005 20110524
008 110524s2006 ||||||||||||||||| ||eng d
020 $a 9780542629341
035 $a (UMI)AAI3212961
035 $a AAI3212961
040 $a UMI $c UMI
100 1 $a Fosco, Tinamarie. $3 1271977
245 1 0 $a Ion concentrations in atmospheric aerosols: The influence of nitrogen oxides and ozone mixing ratios, local meteorology, and the lake breeze in Chicago, Illinois.
300 $a 149 p.
500 $a Adviser: Martina Schmeling.
500 $a Source: Dissertation Abstracts International, Volume: 67-04, Section: B, page: 1979.
502 $a Thesis (Ph.D.)--Loyola University Chicago, 2006.
520 $a Aerosols adversely affect local air quality and impact human health and climate. This is especially true of aerosols composed of sulfate and nitrate, which can form within the atmosphere through reactions involving the trace gases NOx (NO2 + NO) and ozone. The presence of these species in Chicago is not only dependent on vehicular and industrial emissions, but also on local meteorology including the lake breeze. The lake breeze allows air masses containing precursor pollutants residing above Lake Michigan to return back to the city possibly leading to increased pollution levels.
520 $a To study this effect, atmospheric aerosol samples were taken at the Loyola University Chicago air station (LUCAS) in the summers of 2002, 2003 and 2004. Particulates were collected onto quartz fiber filters twice a day from 0700h-1000h and from 1100h-1300h in order to determine pollutant levels before and after a lake breeze onset. Weather conditions, and ozone and NOx mixing ratios were monitored in parallel. After collection, particles were extracted from the filters and analyzed for inorganic anions and cations, and low molecular weight organic acids by ion chromatography. The method employed for determining ions in aerosols was validated by various experiments, which showed high filter collection and extraction efficiency, and good method repeatability and reproducibility.
520 $a The most abundant ions found in Chicago were sulfate, nitrate and ammonium However, the concentrations varied each summer study due to differences in overall temperatures and wind direction profiles. The formation of sulfate and nitrate was also investigated in regard to ammonium ratios, which showed dependence on wind direction and the lake breeze effect. A case study was used to further investigate the influence of trace gas mixing ratios and meteorology on ion concentrations. Four cases were distinguished in which sulfate, nitrate and oxalate concentrations varied depending upon weather parameters and ozone and NOx mixing ratios. Case 1 described days with conditions for the lowest ion concentrations and case 2 consisted of days with moderate ion concentrations, while days in case 3 showed conditions leading to a lake breeze and as a result, to elevated ion concentrations and case 4 was composed of days with the highest ion concentrations. The cases were validated by statistical analysis. Finally, methods were developed for determining the concentrations of gas phase ammonia and organic acids to complement results found for ion concentrations in Chicago.
590 $a School code: 0112.
650 4 $a Chemistry, Analytical. $3 586156
650 4 $a Engineering, Environmental. $3 783782
650 4 $a Environmental Sciences. $3 676987
650 4 $a Physics, Atmospheric Science. $3 1019431
690 $a 0486
690 $a 0608
690 $a 0768
690 $a 0775
710 2 $a Loyola University Chicago. $3 1020295
773 0 $t Dissertation Abstracts International $g 67-04B.
790 $a 0112
790 1 0 $a Schmeling, Martina, $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3212961