Long-range transport of Asian emissions to the West Pacific tropical tropopause layer
Long-range transport of Asian emissions to the West Pacific tropical tropopause layer
复制标题
亚洲排放物远距离传输至西太平洋热带对流层顶层
DOI:
10.1007/s10874-022-09430-7
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发表时间:
2022
影响因子:
2
通讯作者:
Moore, Fred
中科院分区:
文献类型:
--
作者:
Treadaway, Victoria;Atlas, Elliot;Schauffler, Sue;Navarro, Maria;Ueyama, Rei;Pfister, Leonhard;Thornberry, Troy;Rollins, Andrew;Elkins, James;Moore, Fred
Rapid transport by deep convection is an important mechanism for delivering surface emissions of reactive halocarbons and other trace species to the tropical tropopause layer (TTL), a key region of transport to the stratosphere. Recent model studies have indicated that increased delivery of short-lived halocarbons to the TTL could delay stratospheric ozone recovery. We report here measurements in the TTL over the western Pacific Ocean of short-lived halocarbons and other trace gases that were transported eastward after convective lofting over Asia. Back-trajectories indicate the sampled air primarily originated from the Indian subcontinent. While short-lived organic bromine species show no measurable change over background mixing ratios, short-lived chlorinated organic species were elevated above background mixing ratios (dichloromethane (Δ48.2 ppt), 1,2-dichloroethane (Δ4.21 ppt), and chloroform (Δ4.85 ppt)), as well as longer-lived halogenated species, methyl chloride (Δ82.0 ppt) and methyl bromide (Δ1.91 ppt). This transported air mass thus contributed an excess equivalent effective chlorine burden of 316 ppt, with 119 ppt from short lived chlorinated species, to the TTL. Non-methane hydrocarbons (NMHC) were elevated 60 - 400% above background mixing ratios. The NMHC measurements were used to characterize the potential source regions, which are consistent with the convective influence analysis. The measurements indicate a chemical composition heavily impacted by biofuel/biomass burning and industrial emissions. This work shows that convection can loft Asian emissions, including short-lived chlorocarbons, and transport them to the remote TTL.
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DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
K. Krüger;B. Quack
通讯作者:
B. Quack
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
T. Umezawa;A. Baker;D. Oram;C. Sauvage;D. O’Sullivan;A. Rauthe;S. Montzka;A. Zahn;C. Brenninkmeijer
通讯作者:
C. Brenninkmeijer
影响因子:
--
作者:
S. Lal;L. Sahu;S. Venkataramani;C. Mallik
通讯作者:
C. Mallik
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
S. Tegtmeier;K. Krüger;B. Quack;E. Atlas;D. Blake;H. Boenisch;A. Engel;H. Hepach;R. Hossaini;M. Navarro;S. Raimund;S. Sala;Qiang Shi;F. Ziska
通讯作者:
F. Ziska
影响因子:
5
作者:
E. Yates;R. Derwent;P. Simmonds;B. Greally;S. O'Doherty;D. Shallcross
通讯作者:
D. Shallcross