| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2024-05-07 |
| タイトル |
|
|
タイトル |
Atmospheric aerosol optical properties and trends over Antarctica using in-situ measurements and MERRA-2 aerosol products |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Aerosol optical thickness |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Black carbon |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
Antarctica |
| キーワード |
|
|
言語 |
en |
|
主題Scheme |
Other |
|
主題 |
MERRA-2 |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 著者 |
Kannemadugu Hareef Baba Shaeb
Sudhakaran Syamala Prijith
Taori Alok
Bothale Rajashree Vinod
Chauhan Prakash
|
| 抄録 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
Columnar aerosol loading and surface level atmospheric black carbon (BC) concentration over the Antarctic are examined using the measurements carried out at the Indian Antarctic stations, Bharati and Maitri, as part of the 36th Indian Scientific Expedition (2016–17) to Antarctica (ISEA). The mean aerosol optical depth (AOD) at wavelength 500 nm at Bharati is observed to be 0.101 ± 0.01, whereas that at Maitri is 0.047 ± 0.003. Columnar aerosol loading at Bharati is found to be more than two times that measured at Maitri. The daily mean surface level atmospheric BC concentration at Bharati in the Austral summer from December 2016 to February 2017 is 24 ± 16.5 ngm−3. Comparison of this measurement with earlier reported values over the same region indicates an increase in surface-level atmospheric BC concentration. Long-term (1997–2017) trend analysis carried out using MERRA-2 aerosol reanalysis data also corroborates the increasing trend in AOD and BC concentration with 0.005 (0.007) yr−1 and 0.3 (0.27) ngm−3 yr−1 over Bharati (Maitri) respectively. Spectral variations of aerosol absorption coefficients show absorption angstrom exponent values (AAE) close to unity (1.096 ± 0.029), which indicates that fossil fuel emission is the primary source of absorbing aerosols over this region. During the study period, air mass back trajectory analysis indicates that the sources are from the Antarctic, coastal, and southern ocean regions with no long-range transport from other continents in the southern hemisphere. |
|
言語 |
en |
| 書誌情報 |
en : Polar Science
巻 38,
p. 101011,
発行日 2023-12-31
|
| ISSN |
|
|
収録物識別子タイプ |
PISSN |
|
収録物識別子 |
1873-9652 |
| ISSN |
|
|
収録物識別子タイプ |
EISSN |
|
収録物識別子 |
1876-4428 |
| DOI |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.1016/j.polar.2023.101011 |
|
|
言語 |
en |
|
|
関連名称 |
10.1016/j.polar.2023.101011 |
| 出版タイプ |
|
|
出版タイプ |
NA |
|
出版タイプResource |
http://purl.org/coar/version/c_be7fb7dd8ff6fe43 |
