Long-range transport of volcanic aerosol from the 2010 Merapi tropical eruption to Antarctica
Long-range transport of volcanic aerosol from the 2010 Merapi tropical eruption to Antarctica
复制标题
2010 年默拉皮热带火山喷发的火山气溶胶远距离输送到南极洲
DOI：
10.5194/acp-18-15859-2018
复制
发表时间：
2018-11
期刊：
影响因子：
--
通讯作者：
Lars Hoffmann
中科院分区：
文献类型：
--
作者：
Xue Wu;Sabine Griessbach;Lars Hoffmann
Abstract. Volcanic sulfate aerosol is an important source of sulfur for
Antarctica, where other local sources of sulfur are rare. Midlatitude and high-latitude volcanic eruptions can directly influence the aerosol budget of the
polar stratosphere. However, tropical eruptions can also enhance polar
aerosol load following long-range transport. In the present work, we analyze
the volcanic plume of a tropical eruption, Mount Merapi in 2010, and
investigate the transport pathway of the volcanic aerosol from the tropical
tropopause layer (TTL) to the lower stratosphere over Antarctica. We use the
Lagrangian particle dispersion model Massive-Parallel Trajectory Calculations
(MPTRAC) and Atmospheric Infrared Sounder (AIRS) SO2 measurements
to reconstruct the altitude-resolved SO2 injection time series
during the explosive eruption period and simulate the transport of the
volcanic plume using the MPTRAC model. AIRS SO2 and aerosol
measurements, the aerosol cloud index values provided by Michelson
Interferometer for Passive Atmospheric Sounding (MIPAS), are used to verify
and complement the simulations. The Lagrangian transport simulation of the
volcanic plume is compared with MIPAS aerosol measurements and shows good
agreement. Both the simulations and the observations presented in this study
suggest that volcanic plumes from the Merapi eruption were transported to the
south of 60∘ S 1 month after the eruption and even further to
Antarctica in the following months. This relatively fast meridional transport
of volcanic aerosol was mainly driven by quasi-horizontal mixing from the TTL
to the extratropical lower stratosphere, and most of the quasi-horizontal
mixing occurred between the isentropic surfaces of 360 to 430 K. When the
plume went to Southern Hemisphere high latitudes, the polar vortex was
displaced from the South Pole, so that the volcanic plume was carried to the
South Pole without penetrating the polar vortex. Although only 4 % of the
sulfur injected by the Merapi eruption was transported into the lower
stratosphere south of 60∘ S, the Merapi eruption contributed up to
8800 t of sulfur to the Antarctic lower stratosphere. This indicates that
the long-range transport under favorable meteorological conditions enables a
moderate tropical volcanic eruption to be an important remote source of
sulfur for the Antarctic stratosphere.
登录
查看更多内容
影响因子：
--
作者：
R. Portmann;S. Solomon;R. Garcia;L. Thomason;L. Poole;M. McCormick
通讯作者：
R. Portmann;S. Solomon;R. Garcia;L. Thomason;L. Poole;M. McCormick
影响因子：
--
作者：
M. Höpfner;M. Pitts;L. Poole
通讯作者：
M. Höpfner;M. Pitts;L. Poole
影响因子：
5.2
作者：
R. Spang;M. Riese;D. Offermann
通讯作者：
R. Spang;M. Riese;D. Offermann
影响因子：
--
作者：
I. Pisso;E. Real;K. Law;B. Legras;N. Bousserez;J. Attié;H. Schlager
通讯作者：
I. Pisso;E. Real;K. Law;B. Legras;N. Bousserez;J. Attié;H. Schlager
DOI：
10.1109/tgrs.2002.808356
发表时间：
2003-02-01
影响因子：
8.2
作者：
Aumann, HH;Chahine, MT;Susskind, J
通讯作者：
Susskind, J