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Observations of nitrogen dioxide, total peroxy nitrates, total alkyl nitrates, and nitric acid in the mid-sierras and Sacramento plume using thermal dissociation - laser induced fluorescence

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Observations of nitrogen dioxide, total peroxy nitrates, total alkyl nitrates, and nitric acid in the mid-sierras and Sacramento plume using thermal dissociation - laser induced fluorescence
作者:	Day, Douglas Allen.
面頁冊數:	205 p.
附註:	Chair: Ronald C. Cohen.
附註:	Source: Dissertation Abstracts International, Volume: 65-02, Section: B, page: 0791.
Contained By:	Dissertation Abstracts International65-02B.
標題:	Physics, Atmospheric Science.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3121453
ISBN:	0496688049

Observations of nitrogen dioxide, total peroxy nitrates, total alkyl nitrates, and nitric acid in the mid-sierras and Sacramento plume using thermal dissociation - laser induced fluorescence
Day, Douglas Allen.

Observations of nitrogen dioxide, total peroxy nitrates, total alkyl nitrates, and nitric acid in the mid-sierras and Sacramento plume using thermal dissociation - laser induced fluorescence [electronic resource] - 205 p.

Chair: Ronald C. Cohen.

Thesis (Ph.D.)--University of California, Berkeley, 2003.

In Chapter 4, I describe and analyze the seasonal and diurnal cycles of SigmaNOyi, NOx, SigmaPNs, SigmaANs, HNO 3, CO, and O3 observed at the UC-BFRS. The seasonal cycles (most peaked in summer) are attributed to a combination of changes in transport and chemical processing. (Abstract shortened by UMI.)

ISBN: 0496688049Subjects--Topical Terms:

212477
Physics, Atmospheric Science.

Observations of nitrogen dioxide, total peroxy nitrates, total alkyl nitrates, and nitric acid in the mid-sierras and Sacramento plume using thermal dissociation - laser induced fluorescence
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245 1 0 $a Observations of nitrogen dioxide, total peroxy nitrates, total alkyl nitrates, and nitric acid in the mid-sierras and Sacramento plume using thermal dissociation - laser induced fluorescence $h [electronic resource]
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500 $a Chair: Ronald C. Cohen.
500 $a Source: Dissertation Abstracts International, Volume: 65-02, Section: B, page: 0791.
502 $a Thesis (Ph.D.)--University of California, Berkeley, 2003.
520 # $a In Chapter 4, I describe and analyze the seasonal and diurnal cycles of SigmaNOyi, NOx, SigmaPNs, SigmaANs, HNO 3, CO, and O3 observed at the UC-BFRS. The seasonal cycles (most peaked in summer) are attributed to a combination of changes in transport and chemical processing. (Abstract shortened by UMI.)
520 # $a In Chapters 3 and 4, I describe nearly continuous measurements of NO2, total peroxy nitrates (SigmaPNs), total alkyl nitrates (SigmaANs), and HNO3 which were made from October 2000 to February 2002 at the University of California Research Station (UC-BFRS). SigmaANs were observed to routinely comprise 10--20% of NOy, a much larger fraction than previously reported (typically <1--3%). In contrast to prior observations that suggested SigmaANs are negligible, I demonstrate here that large abundances of SigmaANs are consistent with simple chemical models of tropospheric ozone production and with the few prior comprehensive model studies. SigmaANs were strongly correlated with O3 at the UC-BFRS. I illustrate how SigmaANs production is directly linked to the HOx/NOx ozone production cycles. SigmaANs were observed at similar concentrations (200--800 ppt), with a similar seasonal cycle (summer peak), and similar correlations with photochemical parameters (O 3, peroxy nitrates) to previous reports of 'missing NOy' at non-urban, mid-latitude continental sites. Comparison of the sum NO y as measured by TD-LIF (SigmaNOyi) to observations of total NOy as measured by the catalysis chemiluminesence method showed good agreement. Observations of SigmaANs at Granite Bay, California and La Porte, Texas also provide consistent insights, leading to the conclusion that SigmaANs are most, if not all, of the 'missing NOy'.
520 # $a Nitrogen oxide radicals (NOx &equiv; NO + NO2) control the rate of tropospheric ozone production and affect particle formation through production of HNO3 and organic nitrates. The chemistry affecting the fate of NOx while extensively studied in the laboratory, remains poorly documented in the atmosphere because of the difficulty of making simultaneous observations of NOx and NOx reaction products. Furthermore, it has been difficult to obtain such observations under conditions where chemistry occurs in a well understood transport regime. In Chapter 2 of this dissertation, I describe development of a new experimental technique, thermal dissociation-laser induced fluorescence (TD-LIF), capable of observing NO2, SigmaPNs, SigmaANs, and HNO3, and its applications to field measurements. The instrument's capabilities to measure HNO3 and SigmaANs are unique. Also, as a result of progress that has been made at simplifying maintenance, it has a unique capacity to obtain long term records.
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