Research centres in Antarctica are widespread. Figure 1
shows just how many research centres, permanent or otherwise are present in
Antarctica today. In fact, there are approximately 4,000 scientists and
technicians living and working in the station during the summer and
approximately 1,000 working there during the winter (Gröndahl et al. 2009). Because
the research population is in the thousands, human impact on the environment
will be significant given the sensitivity of the Antarctic environment.
Furthermore, it can be argued that the Antarctic is becoming disturbed due to
permanent human residency and man-made construction (ibid).
Figure 1. All the research stations in Antarctica. Adapted from Antarctic Glaciers (2013)
Setting up centres in Antarctica are supposedly justified
by their work on measuring:
- The ozone layer and patterns of change
- Atmospheric chemistry
- Global sea level changes
- Information on climate change
…and much more.
Before I explain the impact of these centres directly on
the Antarctic environment, I want to give you a few examples that
demonstrate the value of research centres.
Vostok
Information on climate change is found by taking ice
cores and using them to infer past climate as well as current climate. A
Russian station called the Vostok research station was established in 1957. A
reasonably famous study undertaken in 1999 by the Vostok station was the use of
ice cores to reconstruct the climate in the past 420,000 years (Petit et al., 1999). Ice cores enable the reconstruction of past
environments because trapped are in the ice indicate past atmospheric conditions,
i.e. concentrations of carbon dioxide and methane. These help determine what
climate was like. The results from Vostok are shown in figure 2.
Figure 2. Results from the Vostok ice core. Data shows the climate record for the past 420,000 years. Main finding: anthropogenic activity has increased the levels of methane and carbon dioxide. Source: Petit (2007) in Knight (ed) 'Glacier Science and Environmental Change', p. 404.
The findings from this research project were relevant
because they showed that carbon dioxide and methane levels now surpass levels
in any of the past 400,000 years. Thus, this research presented solid evidence
for anthropogenic climate change.
Halley Bay
Another major finding from research stations in
Antarctica was the hole in the ozone layer, found from research undertaken at
the Halley Bay (now known as just Halley) research station in 1985 (Farman et al., 1985).
As can be seen, research centres have made significant
contributions to climate, climate change and atmospheric conditions. The research conducted is not only for the purpose of human benefit, recall the discovery of the hole in the ozone layer. This shows that Antarctica is benefiting from the research.
Having said this, in making some of these important discoveries, sometimes the condition of the Antarctic
environment has been compromised and this is what I will explain in my next
post.
No comments:
Post a Comment
I'd like to hear your thoughts, please comment below :)