Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017JD026836 |
Temporal Characteristics of CH4 Vertical Profiles Observed in the West Siberian Lowland Over Surgut From 1993 to 2015 and Novosibirsk From 1997 to 2015 | |
Sasakawa, M.1; Machida, T.1; Ishijima, K.2; Arshinov, M.3; Patra, P. K.2; Ito, A.1; Aoki, S.4; Petrov, V.5 | |
2017-10-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES |
ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:20 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; Russia |
英文摘要 | We have carried out monthly flask sampling using aircraft, in the altitude range of 0-7 km, over the boreal wetlands in Surgut (61 degrees N, 73 degrees E; since 1993) and a pine forest near Novosibirsk (55 degrees N, 83 degrees E; since 1997), both located in the West Siberian Lowland (WSL). The temporal variation of methane (CH4) concentrations at all altitudes at both sites exhibited an increasing trend with stagnation during 2000-2006 as observed globally from ground-based networks. In addition to a winter maximum as seen at other remote sites in northern middle to high latitudes, another seasonal maximum was also observed in summer, particularly in the lower altitudes over the WSL, which could be attributed to emissions from the wetlands. Our measurements suggest that the vertical gradient at Surgut has been decreasing; the mean CH4 difference between 5.5 km and 1.0 km changed from 64 +/- 5 ppb during 1995-1999 to 37 +/- 3 ppb during 2009-2013 (mean +/- standard error). No clear decline in the CH4 vertical gradient appeared at Novosibirsk. Simulations using an atmospheric chemistry-transport model captured the observed decrease in the vertical CH4 gradient at Surgut when CH4 emissions from Europe decreased but increased from the regions south of Siberia, for example, East and South Asia. At Novosibirsk, the influence of the European emissions was relatively small. Our results also suggest that the regional emissions around the WSL did not change significantly over the period of our observations. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000417195200040 |
WOS关键词 | ATMOSPHERIC METHANE ; AIRCRAFT MEASUREMENTS ; SOURCE IDENTIFICATION ; GAS-PRODUCTION ; GROWTH-RATE ; EMISSIONS ; OIL ; CARBON ; CO2 ; TROPOSPHERE |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33834 |
专题 | 气候变化 |
作者单位 | 1.Natl Inst Environm Studies, Ctr Global Environm Res, Tsukuba, Ibaraki, Japan; 2.JAMSTEC, Res Inst Global Change, Yokohama, Kanagawa, Japan; 3.Russian Acad Sci, Siberian Branch, VE Zuev Inst Atmospher Opt, Tomsk, Russia; 4.Tohoku Univ, Grad Sch Sci, Ctr Atmospher & Ocean Studies, Sendai, Miyagi, Japan; 5.ROSHYDROMET, Cent Aerol Observ, Dolgoprudnyi, Russia |
推荐引用方式 GB/T 7714 | Sasakawa, M.,Machida, T.,Ishijima, K.,et al. Temporal Characteristics of CH4 Vertical Profiles Observed in the West Siberian Lowland Over Surgut From 1993 to 2015 and Novosibirsk From 1997 to 2015[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(20). |
APA | Sasakawa, M..,Machida, T..,Ishijima, K..,Arshinov, M..,Patra, P. K..,...&Petrov, V..(2017).Temporal Characteristics of CH4 Vertical Profiles Observed in the West Siberian Lowland Over Surgut From 1993 to 2015 and Novosibirsk From 1997 to 2015.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(20). |
MLA | Sasakawa, M.,et al."Temporal Characteristics of CH4 Vertical Profiles Observed in the West Siberian Lowland Over Surgut From 1993 to 2015 and Novosibirsk From 1997 to 2015".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.20(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论