| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2013-11-11 |
| タイトル |
|
|
タイトル |
Air-lake exchange of methane during the open water season in Syowa Oasis, East Antarctica |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Air-lake exchange |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
Syowa Oasis |
| キーワード |
|
|
主題Scheme |
Other |
|
主題 |
East Antarctica |
| 資源タイプ |
|
|
資源 |
http://purl.org/coar/resource_type/c_6501 |
|
タイプ |
journal article |
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 著者 |
SASAKI, Masafumi
ENDOH, Noboru
IMURA, Satoshi
KUDOH, Sakae
YAMANOUCHI, Takashi
MORIMOTO, Shinji
HASHIDA, Gen
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Dissolved methane concentrations (DM) in 17 lakes were measured as a part of the operations of the 45th Japanese Antarctic Research Expedition in ice-free rocky areas along the eastern coast of Lutzow-Holm Bay (Syowa Oasis) in East Antarctica in the summer of 2003~2004. DM at the surfaces of 14 lakes ranged from the atmospheric equilibrium concentration (about 4 nmol L?1 for fresh water) to 385 nmol L?1. Relatively low DM of less than 50 nmol L?1 were observed at about 60% of the lakes. Many of the lakes (area fraction of 85%) were supersaturated and are thus sources of methane to the atmosphere. The exchange coefficient was calculated using wind speed data at Syowa Station. Area fraction frequency distributions with 4 surface DM ranges were applied to all lakes at Syowa Oasis (110 lakes: total lake area of 9 km2). Extrapolation to the whole Syowa Oasis gives an estimate of total emission of about 1 t-CH4 yr?1. This is the first estimation of methane flux from the surfaces of thawed lakes to the atmosphere in Antarctica. Since methane efflux of about 2 t-CH4 yr?1 from frozen bubbles in lake ice was estimated in our previous study, a total amount of 3 t-CH4 yr?1 would be released to the atmosphere from the lakes during the ice melting season (December ~ January) at Syowa Oasis. |
| 書誌情報 |
JOURNAL OF GEOPHYSICAL RESEARCH ATMOSPHERE
巻 115,
号 D16313,
p. 1-14,
発行日 2010-08
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| DOI |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
http://doi.org/10.1029/2010JD013822 |
| 出版者 |
|
|
出版者 |
American Geophysical Union (AGU) |
|
言語 |
en |
| 著者版フラグ |
|
|
言語 |
en |
|
値 |
author |
| 出版タイプ |
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|
出版タイプ |
AM |
|
出版タイプResource |
http://purl.org/coar/version/c_ab4af688f83e57aa |
JGR-#2+(KIT-R).pdf (879.3 kB)
