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Records of delta-carbon-13, delta-ox...

Wang, Zhihui.

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Records of delta-carbon-13, delta-oxygen-18 and concentration of atmospheric carbon monoxide in the past.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Records of delta-carbon-13, delta-oxygen-18 and concentration of atmospheric carbon monoxide in the past./
作者:	Wang, Zhihui.
面頁冊數:	218 p.
附註:	Source: Dissertation Abstracts International, Volume: 71-04, Section: B, page: 2251.
Contained By:	Dissertation Abstracts International71-04B.
標題:	Atmospheric Chemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3405927
ISBN:	9781109725223

Records of delta-carbon-13, delta-oxygen-18 and concentration of atmospheric carbon monoxide in the past.
Wang, Zhihui.

Records of delta-carbon-13, delta-oxygen-18 and concentration of atmospheric carbon monoxide in the past. - 218 p.

Source: Dissertation Abstracts International, Volume: 71-04, Section: B, page: 2251.

Thesis (Ph.D.)--State University of New York at Stony Brook, 2009.

Atmospheric carbon monoxide (CO) plays a significant role in atmospheric chemistry, as CO is a major sink for atmospheric hydroxyl radicals (OH) and thus strongly influences the oxidizing capacity of the atmosphere. In this thesis, new high precision measurements of atmospheric CO concentration and isotope composition during the past 700 years have been accomplished by analyzing the air in polar snow and ice.

ISBN: 9781109725223Subjects--Topical Terms:

1669583
Atmospheric Chemistry.

Records of delta-carbon-13, delta-oxygen-18 and concentration of atmospheric carbon monoxide in the past.
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245 1 0 $a Records of delta-carbon-13, delta-oxygen-18 and concentration of atmospheric carbon monoxide in the past.
300 $a 218 p.
500 $a Source: Dissertation Abstracts International, Volume: 71-04, Section: B, page: 2251.
500 $a Adviser: John E. Mak.
502 $a Thesis (Ph.D.)--State University of New York at Stony Brook, 2009.
520 $a Atmospheric carbon monoxide (CO) plays a significant role in atmospheric chemistry, as CO is a major sink for atmospheric hydroxyl radicals (OH) and thus strongly influences the oxidizing capacity of the atmosphere. In this thesis, new high precision measurements of atmospheric CO concentration and isotope composition during the past 700 years have been accomplished by analyzing the air in polar snow and ice.
520 $a The first part of this study focuses on the trends of atmospheric CO over the past several decades. Firn air samples from the North Greenland Ice Core Project, Berkner Island, and North Greenland Eemian Ice Drilling (NEEM) have been analyzed to reconstruct atmospheric CO concentration and isotopic compositions during the past half century in both hemispheres. Firn diffusion models have been applied for NEEM firn air data to reconstruct past atmospheric trend in CO, indicating that the maximum of CO concentration and delta 18O in high latitude Northern Hemisphere occurred in 1970s-1980s, reflecting the largest contribution of CO emissions from fossil fuel combustion in this time.
520 $a The second part of this study focuses on atmospheric CO records over the past 700 years. New decade-scale records of CO concentration as well as isotopic ratios have been produced from 40 Antarctic ice core samples (D47 and South Pole). CO concentration in the 13th century was &sim;50 ppbv, which is comparable with today's CO level in high-latitude Southern Hemisphere. CO level then gradually dropped to 38 ppbv during the following 300 years, followed by a gradual increase to 55 ppbv in 1900. delta 13C and delta18O decreased by about 3&permil; and 5&permil; respectively from 1380 to 1700, then increased by about 3&permil; and 5&permil; respectively by 1900. Mass balance model implies biomass burning emissions were high in the 13th century, but reduced by &sim;50% over the next 300 years and then almost doubled by 1900. We conclude biomass burning strongly modulated the CO budget during preindustrial time and considerably decreased since the early 20th century. This decrease was nearly compensated by the concomitant CH4 increase, bringing back CO mixing ratio close to its maximum level observed over the last 700 years.
590 $a School code: 0771.
650 4 $a Atmospheric Chemistry. $3 1669583
650 4 $a Climate Change. $3 894284
650 4 $a Paleoclimate Science. $3 1674687
690 $a 0371
690 $a 0404
690 $a 0653
710 2 $a State University of New York at Stony Brook. $3 1019194
773 0 $t Dissertation Abstracts International $g 71-04B.
790 1 0 $a Mak, John E., $e advisor
790 $a 0771
791 $a Ph.D.
792 $a 2009
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3405927