東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Combining nitrogen oxides and temper...

Pusede, Sally Ellen.

FindBook

Google Book

Amazon

博客來

Combining nitrogen oxides and temperature to derive new observational constraints on the changing chemistry of ozone and aerosol.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Combining nitrogen oxides and temperature to derive new observational constraints on the changing chemistry of ozone and aerosol./
作者:	Pusede, Sally Ellen.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2014,
面頁冊數:	133 p.
附註:	Source: Dissertation Abstracts International, Volume: 76-02(E), Section: B.
Contained By:	Dissertation Abstracts International76-02B(E).
標題:	Atmospheric chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3640609
ISBN:	9781321260755

Combining nitrogen oxides and temperature to derive new observational constraints on the changing chemistry of ozone and aerosol.
Pusede, Sally Ellen.

Combining nitrogen oxides and temperature to derive new observational constraints on the changing chemistry of ozone and aerosol. - Ann Arbor : ProQuest Dissertations & Theses, 2014 - 133 p.

Source: Dissertation Abstracts International, Volume: 76-02(E), Section: B.

Thesis (Ph.D.)--University of California, Berkeley, 2014.

Nitrogen oxide (NOx) abundances across the U.S. have fallen steadily over the last fifteen years. Patterns in anthropogenic sources result in two-fold lower NOx on weekends than weekdays largely without co-occurring changes in other emissions. These trends taken together provide a near perfect NOx constraint on the nonlinear chemistry of ozone (O3), on the key oxidants hydroxyl radical (OH) and nitrate radical (NO3), and on secondary aerosol formation. In this dissertation, I present three observationally driven analyses, each of which couples NO x with temperature in new ways and so yields fresh insight into trends in chemical mechanisms of atmospheric oxidation. The study region is the San Joaquin Valley (SJV) of California, a location with both highly regular meteorology and severe O3 in the summertime and the worst aerosol pollution in the U.S. in the wintertime. First, I analyze fifteen years of routine monitoring records of nitrogen oxides, ozone, and temperature to infer the relative import of NOx and organic emission controls on the frequency of high O 3 days in three city-scale urban plumes. I show that chemical O 3 production (PO3) rather than meteorology dominates the statistics of exceedances of the California 8-h O3 standard, that temperature when combined with NOx is a useful parameter for interpreting the total reactivity of organic emissions with OH, and that the sensitivity of PO3 to its precursors has changed differently in response to controls as a function of temperature and location over the last decade. Second, I investigate the comprehensive CALNEX-SJV dataset (18 May-29 June, 2010). I classify components of daytime speciated organic reactivity as either independent of or exponential with temperature. I use this classification to consider the effects of changes in organic emissions over the last decade and to make predictions for the next ten years. I test the impacts of various emission controls on PO3 with an analytical model constrained to CALNEX-SJV observations and show the effect of each reduction scenario is strongly temperature dependent. Third, I interpret trends in wintertime relationships between NO x, ammonium nitrate (NH4NO3), and total aerosol mass over the last decade in the SJV. To do so, I combine the decade-long routine monitoring record of PM2.5, nitrogen oxides, ozone, and meteorological conditions and the air- and ground-based DISCOVER-AQ-2013 dataset (14 January-14 February, 2013). I then construct observationally derived decadal trends in NH4NO3 production by daytime and nighttime chemical mechanisms and describe distinct circumstances for which NO x reductions have increased and decreased NH4NO3 production over the record. The net effect has been a substantial reduction in aerosol NO3- due to decreased production in the nocturnal residual layer. I use this analysis to quantify the impacts of future NOx controls on both NH4NO3 and total aerosol mass in the SJV. Due to NOx decreases in the region, NH4NO3 formation will shift from being driven by NO 3-radical chemistry at night, as it has been for the last twelve years, to being dominated by daytime OH-initiated chemistry in the next decade.

ISBN: 9781321260755Subjects--Topical Terms:

544140
Atmospheric chemistry.

Combining nitrogen oxides and temperature to derive new observational constraints on the changing chemistry of ozone and aerosol.
LDR:04143nmm a2200277 4500 001 2125658
005 20171113102615.5
008 180830s2014 ||||||||||||||||| ||eng d
020 $a 9781321260755
035 $a (MiAaPQ)AAI3640609
035 $a AAI3640609
040 $a MiAaPQ $c MiAaPQ
100 1 $a Pusede, Sally Ellen. $3 3287738
245 1 0 $a Combining nitrogen oxides and temperature to derive new observational constraints on the changing chemistry of ozone and aerosol.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2014
300 $a 133 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-02(E), Section: B.
500 $a Adviser: Ronald C. Cohen.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2014.
520 $a Nitrogen oxide (NOx) abundances across the U.S. have fallen steadily over the last fifteen years. Patterns in anthropogenic sources result in two-fold lower NOx on weekends than weekdays largely without co-occurring changes in other emissions. These trends taken together provide a near perfect NOx constraint on the nonlinear chemistry of ozone (O3), on the key oxidants hydroxyl radical (OH) and nitrate radical (NO3), and on secondary aerosol formation. In this dissertation, I present three observationally driven analyses, each of which couples NO x with temperature in new ways and so yields fresh insight into trends in chemical mechanisms of atmospheric oxidation. The study region is the San Joaquin Valley (SJV) of California, a location with both highly regular meteorology and severe O3 in the summertime and the worst aerosol pollution in the U.S. in the wintertime. First, I analyze fifteen years of routine monitoring records of nitrogen oxides, ozone, and temperature to infer the relative import of NOx and organic emission controls on the frequency of high O 3 days in three city-scale urban plumes. I show that chemical O 3 production (PO3) rather than meteorology dominates the statistics of exceedances of the California 8-h O3 standard, that temperature when combined with NOx is a useful parameter for interpreting the total reactivity of organic emissions with OH, and that the sensitivity of PO3 to its precursors has changed differently in response to controls as a function of temperature and location over the last decade. Second, I investigate the comprehensive CALNEX-SJV dataset (18 May-29 June, 2010). I classify components of daytime speciated organic reactivity as either independent of or exponential with temperature. I use this classification to consider the effects of changes in organic emissions over the last decade and to make predictions for the next ten years. I test the impacts of various emission controls on PO3 with an analytical model constrained to CALNEX-SJV observations and show the effect of each reduction scenario is strongly temperature dependent. Third, I interpret trends in wintertime relationships between NO x, ammonium nitrate (NH4NO3), and total aerosol mass over the last decade in the SJV. To do so, I combine the decade-long routine monitoring record of PM2.5, nitrogen oxides, ozone, and meteorological conditions and the air- and ground-based DISCOVER-AQ-2013 dataset (14 January-14 February, 2013). I then construct observationally derived decadal trends in NH4NO3 production by daytime and nighttime chemical mechanisms and describe distinct circumstances for which NO x reductions have increased and decreased NH4NO3 production over the record. The net effect has been a substantial reduction in aerosol NO3- due to decreased production in the nocturnal residual layer. I use this analysis to quantify the impacts of future NOx controls on both NH4NO3 and total aerosol mass in the SJV. Due to NOx decreases in the region, NH4NO3 formation will shift from being driven by NO 3-radical chemistry at night, as it has been for the last twelve years, to being dominated by daytime OH-initiated chemistry in the next decade.
590 $a School code: 0028.
650 4 $a Atmospheric chemistry. $3 544140
690 $a 0371
710 2 $a University of California, Berkeley. $b Chemistry. $3 1674000
773 0 $t Dissertation Abstracts International $g 76-02B(E).
790 $a 0028
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3640609