High resolution studies of cosmogenic beryllium isotopes (10Be) at Law Dome

Energy from the Sun drives the Earth's climate system but this energy varies: there is an 11 year solar cycle and the Sun's intensity has varied over longer timescales. Reconstructing how the Sun's output has varied in past times is crucial to understanding the Earth's past clima...

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Bibliographic Details
Other Authors: SMITH, ANDREW M (hasPrincipalInvestigator), SMITH, ANDREW M (processor), Australian Antarctic Data Centre (publisher)
Format: Dataset
Language:unknown
Published: Australian Antarctic Data Centre
Subjects:
climatologyMeteorologyAtmosphere
ICE CORE RECORDS
EARTH SCIENCE
PALEOCLIMATE
ISOTOPES
Snow Pit
beryllium
10Be
Law Dome
FIELD INVESTIGATION
FIELD SURVEYS
CONTINENT &gt
ANTARCTICA
GEOGRAPHIC REGION &gt
POLAR
Antarc*
Antarctica
ice core
Online Access:https://researchdata.ands.org.au/high-resolution-studies-law-dome/700508
https://doi.org/10.4225/15/565541A74DA7D
https://data.aad.gov.au/metadata/records/beryllium_10be_isotopes_lawdome
http://nla.gov.au/nla.party-617536
Description
Summary:Energy from the Sun drives the Earth's climate system but this energy varies: there is an 11 year solar cycle and the Sun's intensity has varied over longer timescales. Reconstructing how the Sun's output has varied in past times is crucial to understanding the Earth's past climate which is key to predicting future climate change. Naturally-occurring radioactive isotopes such as 7Be and 10Be are produced in the Earth's atmosphere by cosmic rays, at a rate controlled by the activity of the Sun, and are layered in ice sheets, thus providing a means of reconstructing past solar output. 3 x 3" PICO firn cores were drilled immediately in front of snow pit. The 3 pico cores were sampled at 14cm intervals and the sections combined resulting in 16 samples. Some length was lost during transit, especially in the top cores. It was assumed that the lost length was from the breaks in the core as the ends rubbed against each other during transport, and was evenly lost from each break, using the field notes to help. The bottom of each core was assumed to be the lengths as measured in the field. The samples were placed in a melting jar with carrier and left to melt overnight. ~10mL of the samples were retained for water isotope analysis. The samples were filtered and pumped onto cation columns.

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