Abstract
We describe a new dust logger designed to operate in water‐filled IceCube boreholes in South Pole ice, and we give examples of its performance. We recorded optical effects due to bubbles, dust, and volcanic ash in situ from ∼70 to 2100 meters. Seasonal layering in bubble concentration could also be discerned. Below ∼1300 m over the interval 25 ka to 70 ka, because of the conversion of all air bubbles to invisible hydrate crystals, and the close match between refractive indices of the surrounding ice and the water in the borehole, scattering from dust provided fine‐structure in the depth‐dependence of concentration with a resolution of <1 cm. Thin, highly absorptive horizons in the data set confirm there is significant fallout at South Pole of ash from explosive volcanic events. By locating and dating volcanic ash layers in the South Pole dust record, it may be possible to match them to volcanic layers found across Antarctica and in Greenland.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
