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Record #164677:

Methanesulphonate in the firn of King George Island, Antarctica / Jiankang Han, Zichu Xie, Xinping Zhang, Dongsheng Dai, P.A. Mayewski, M.S. Twickler.

Title: Methanesulphonate in the firn of King George Island, Antarctica / Jiankang Han, Zichu Xie, Xinping Zhang, Dongsheng Dai, P.A. Mayewski, M.S. Twickler.
Author(s): Han, Jiankang.
Xie, Zichu.
Zhang, Xinping.
Dai, Dongsheng.
Mayewski, P. A.
Twickler, M. S.
Date: 2001.
In: Journal of Glaciology. (2001.), Vol. 47(159) (2001)
Abstract: Seeks to enhance knowledge of oceanic biogenic sulphur cycle and to evaluate past levels of biological activity in the oceans. Examines seasonality of methanesulphonic acid (MSA) deposition in firn at 700 m a.s.l. on Collins Ice Cap, King George Island. Region is believed to have high marine phytoplankton production. Describes excavation and sampling of snow-pit and sampling of core. Presents sulphate, non-sea-salt sulphate and MSA concentrations in upper 10 m of core. Calculates MSA/nss SO₄²⁻ ratio. Seeks to explain unexpected autumn MSA peaks. Suggests large accumulation rate (~ 4 m a⁻¹) should help limit percolation of meltwater into deeper layers and migration of chemical species through firn. Also provides some local observational support for high autumn MSA aerosol concentrations. Concludes, however, that two of three peaks in MSA may largely result from elution of ions in the presence of liquid water and their relocation at greater depths through salt formation.
Notes:

Journal of Glaciology. Vol. 47(159) :589-594 (2001).

Keywords: 551.32 -- Glaciology.
54 -- Chemistry.
551.322 -- Ice and snow.
551.324 -- Land ice.
551.578.46 -- Snow cover and snow patches.
551.321.2 -- Snow and ice, methods of sampling, excavating, drilling, etc.
E5 -- Glaciology: land ice.
(*7) -- Antarctic regions.
(*726.1) -- South Shetland Islands.
(*726.14) -- King George Island group.
SPRI record no.: 164677

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245 00 ‡aMethanesulphonate in the firn of King George Island, Antarctica /‡cJiankang Han, Zichu Xie, Xinping Zhang, Dongsheng Dai, P.A. Mayewski, M.S. Twickler.
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520 3# ‡aSeeks to enhance knowledge of oceanic biogenic sulphur cycle and to evaluate past levels of biological activity in the oceans. Examines seasonality of methanesulphonic acid (MSA) deposition in firn at 700 m a.s.l. on Collins Ice Cap, King George Island. Region is believed to have high marine phytoplankton production. Describes excavation and sampling of snow-pit and sampling of core. Presents sulphate, non-sea-salt sulphate and MSA concentrations in upper 10 m of core. Calculates MSA/nss SO₄²⁻ ratio. Seeks to explain unexpected autumn MSA peaks. Suggests large accumulation rate (~ 4 m a⁻¹) should help limit percolation of meltwater into deeper layers and migration of chemical species through firn. Also provides some local observational support for high autumn MSA aerosol concentrations. Concludes, however, that two of three peaks in MSA may largely result from elution of ions in the presence of liquid water and their relocation at greater depths through salt formation.
650 07 ‡a551.32 -- Glaciology.‡2udc
650 07 ‡a54 -- Chemistry.‡2udc
650 07 ‡a551.322 -- Ice and snow.‡2udc
650 07 ‡a551.324 -- Land ice.‡2udc
650 07 ‡a551.578.46 -- Snow cover and snow patches.‡2udc
650 07 ‡a551.321.2 -- Snow and ice, methods of sampling, excavating, drilling, etc.‡2udc
650 07 ‡aE5 -- Glaciology: land ice.‡2local
651 #7 ‡a(*7) -- Antarctic regions.‡2udc
651 #7 ‡a(*726.1) -- South Shetland Islands.‡2udc
651 #7 ‡a(*726.14) -- King George Island group.‡2udc
700 1# ‡aHan, Jiankang.
700 1# ‡aXie, Zichu.
700 1# ‡aZhang, Xinping.
700 1# ‡aDai, Dongsheng.
700 1# ‡aMayewski, P. A.
700 1# ‡aTwickler, M. S.
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