scholarly journals Evidence for photochemical production of ozone at the South Pole surface

2001 ◽  
Vol 28 (19) ◽  
pp. 3641-3644 ◽  
Author(s):  
J. H. Crawford ◽  
D. D. Davis ◽  
G. Chen ◽  
M. Buhr ◽  
S. Oltmans ◽  
...  
Keyword(s):  
South Pole ◽  
The South ◽  
Photochemical Production ◽  
Pole Surface

scholarly journals Investigating the photo-oxidative and heterogeneous chemical production of HCHO in the snowpack at the South Pole, Antarctica

2014 ◽  
Vol 11 (4) ◽  
pp. 459 ◽  
Author(s):  
P. D. Hamer ◽  
D. E. Shallcross ◽  
A. Yabushita ◽  
M. Kawasaki ◽  
V. Marécal ◽  
...  
Keyword(s):  
Organic Matter ◽  
Surface Layer ◽  
Atmospheric Composition ◽  
South Pole ◽  
Chemical Production ◽  
The South ◽  
Production Rates ◽  
Concentration Effects ◽  
Photochemical Production ◽  
Ultimate Fate

Environmental context Snowpacks present a surprisingly active environment for photochemistry, leading to sunlight-induced oxidation of deposited organic matter and the subsequent emission of a variety of photochemically active trace gases. We seek to address questions regarding the ultimate fate of organic matter deposited onto snow in the remote regions of the world. The work is relevant to atmospheric composition and climate change. Abstract We investigate snowpack fluxes of formaldehyde (HCHO) into the South Pole boundary layer using steady-state photochemical models. We study two chemical sources of HCHO within the snowpack. First, we study chemical production of HCHO from the processing of methyl hydroperoxide (CH3OOH): photolysis, reaction with the hydroxyl radical (OH•), and by an acid catalysed rearrangement. Assuming surface layer concentration effects for acidic solutes, we show that the acid catalysed production of HCHO within ice could contribute a non-negligible source to the snowpack HCHO budget. This novel source of HCHO complements existing explanations of HCHO fluxes based on physical emission of HCHO from snow. Secondly, we investigate HCHO production from the oxidation of organic matter (OM) by OH• within snow to explain observed fluxes of photochemical origin from the South Pole snowpack. This work shows that laboratory-derived photochemical production rates of HCHO and our standard model are inconsistent with field observations, which has implications for the distribution of OM relative to oxidants within ice particles. We resolve this inconsistency using new laboratory measurements of the molecular dynamics of the OH• photofragment from hydrogen peroxide (H2O2) and nitrate (NO3–) photolysis, which show that only OH produced in the outermost monolayers can contribute to gas phase and surface layer chemistry. Using these new measurements in conjunction with realistic treatments of ice grain size, H2O2 and NO3– distribution within ice grains, diffusion of gas species within solid ice, and observed OM particle size distributions yields snowpack HCHO photochemical production rates more consistent with observations.

Expedition to the South Pole: experience of the laboratory game on polar sciences with primary schools

2018 ◽  
Vol 45 ◽  
pp. 31-38
Author(s):  
Federica La Longa ◽  
Massimo Crescimbene ◽  
Lucilla Alfonsi ◽  
Claudio Cesaroni ◽  
Vincenzo Romano
Keyword(s):  
Primary Schools ◽  
South Pole ◽  
The South

scholarly journals Design and performance of the first IceAct demonstrator at the South Pole

2020 ◽  
Vol 15 (02) ◽  
pp. T02002-T02002
Author(s):  
M.G. Aartsen ◽  
M. Ackermann ◽  
J. Adams ◽  
J.A. Aguilar ◽  
M. Ahlers ◽  
...  
Keyword(s):  
South Pole ◽  
The South ◽  
And Performance

scholarly journals Publisher Correction: Record warming at the South Pole during the past three decades

2021 ◽  
Author(s):  
Kyle R. Clem ◽  
Ryan L. Fogt ◽  
John Turner ◽  
Benjamin R. Lintner ◽  
Gareth J. Marshall ◽  
...  
Keyword(s):  
South Pole ◽  
The South ◽  
The Past

scholarly journals Detectors for the South Pole Telescope

2012 ◽  
Vol 37 ◽  
pp. 1381-1388 ◽  
Author(s):  
C.L. Chang ◽  
P. Ade ◽  
K. Aird ◽  
J. Austermann ◽  
J. Beall ◽  
...  
Keyword(s):  
South Pole ◽  
The South ◽  
South Pole Telescope
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