搜索结果: 1-7 共查到“理学 firn air”相关记录7条 . 查询时间(0.109 秒)
Bromide and other ions in the snow, firn air, and atmospheric boundary layer at Summit during GSHOX
Bromide and other ions atmospheric boundary layer Summit GSHOX
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2010/10/21
Measurements of gas phase soluble bromide in the boundary layer and in firn air, and Br− in aerosol and snow, were made at Summit, Greenland (72.5° N, 38.4° W, 3200 m a.s.l.) as part of a larger...
Post-coring entrapment of modern air in some shallow ice cores collected near the firn-ice transition: evidence from CFC-12 measurements in Antarctic firn air and ice cores
modern air shallow ice cores the firn-ice transition CFC-12 measurements Antarctic firn air and ice cores
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2010/8/13
In this study, we report measurements of CFC-12 (CCl2F2) in firn air and in air extracted from shallow ice cores from three Antarctic sites. The firn air data are consistent with the known atmospheric...
Model calculations of the age of firn air across the Antarctic continent
Model calculations firn air Antarctic continent
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2009/3/4
The age of firn air in Antarctica at pore close-off depth is only known for a few specific sites where firn air has been sampled for analyses. We present a model that calculates the age of firn air at...
Trends of halon gases in polar firn air: implications for their emission distributions
halon gases polar firn air emission distributions
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2009/2/13
Four halons (H-1301, H-1211, H-2402 and H-1202) have been measured in air samples collected from polar firn from Dome Concordia (Dome C), Antarctica, from Devon Island, Canada and the North Greenland ...
20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air
budget implications of chloroform tri-and dihalomethanes firn air
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2009/1/13
Four trihalomethane (THM; CHCl3, CHBrCl2, CHBr2Cl and CHBr3) and two dihalomethane (DHM; CH2BrCl and CH2Br2) trace gases have been measured in air extracted from polar firn collected at the North Gre...
Constraints on N2O budget changes since pre-industrial time from new firn air and ice core isotope measurements
N2O budget changes pre-industrial time new firn air ice core isotope measurements
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2008/12/31
A historical record of changes in the N2O isotope composition is important for a better understanding of the global N2O atmospheric budget. Here we have combined measurements of trapped gases in the f...
Evidence for a CO increase in the SH during the 20th century based on firn air samples from Berkner Island, Antarctica
CO SH firn air samples Berkner Island Antarctica
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2008/11/28
Trends of carbon monoxide (CO) for the past 100 years are reported as derived from Antarctic firn drilling expeditions. Only one of 3 campaigns provided high quality results. The trend was reconstruct...