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SCAR Restructure

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Geological and geophysical data exchange and management ... Antarctic Stratigraphy Project (ANTOSTRAT) Environmental Impacts of marine acoustic technology ... – PowerPoint PPT presentation

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Title: SCAR Restructure


1
Working Group on Geosciences
SCAR Restructure Will national organisations
support participation of several representatives
with a range of necessary expertise? Will all
scientific interests be represented?
2
Major Issues in Geology and Geophysics
  • Antarctic Neotectonics.
  • Climate and environmental change
  • Observatory Geophysics
  • Subglacial Lakes
  • Subice geology
  • Antarctic basement geology
  • Permafrost and surficial processes
  • Geological and geophysical data exchange and
    management
  • Environmental impacts of marine acoustic
    technology
  • Antarctic continental margin evolution

3
International Projects ANDRILL - Antarctic
Drilling initiative
Reports of Groups of Specialists Aeromagnetic
Digital Map of Antarctica (ADMAP) Age, Growth
and Evolution of Antarctica (AGEANT) Antarctic
Neotectonics (ANTEC) Subglacial Antarctic Lake
Exploration Group of Specialists (SALE)
Antarctic Ice Margin Evolution (ANTIME)
Antarctic Stratigraphy Project (ANTOSTRAT)
4
Environmental Impacts of marine acoustic
technology
Workshop held in Cambridge in September
2001 Participation and written contributions
from 17 scientist with expertise in Antarctic
biology, marine mammals and acoustics, and
geophysics/marine acoustics. Report prepared and
is being reviewed by four external reviewers
prominent in the field of research and
representing NGOs.
5
Environmental Impacts of marine acoustic
technology
1. The evidence available does not justify a ban
on seismic surveys or scientific echo sounders in
Antarctic waters 2. Surveys should be examined on
a case by case basis 3. Mitigation strategies
should be used to reduce the risk to Antarctic
wildlife from high power, low frequency
sources 4. Acoustic releases and similar low
power, occasional source were not considered a
threat to wildlife
6
  • Mitigation Strategies
  • Use of the minimum source level
  • Use of soft starts (increase power gradually)
  • Design line lay outs to avoid restricting
    animals ability to a avoid the source
  • Equipment should be shut down if marine mammals
    are observed within a distance of the vessel
    defined by the source power, directionality and
    propagation characteristics
  • Surveys should be planned to minimise repeated
    surveying of areas by high risk equipment in
    consecutive years
  • Minimise impacts in known sensitive areas and
    times

7
  • Berlin Workshop
  • Predominantly supportive reaction from leading
    experts
  • Recognition that Antarctica has received a very
    low level of exposure to marine, anthropogenic
    noise
  • Support for suggested mitigation strategies and
    more research

8
Conferences X International Symposium on
Antarctic Earth Sciences (ISAES)Potsdam,
September 2003 Funding application to support
student travel from countries with limited
resources XI ISAES (2007)- Offer from USA to
host the meeting accepted International
Geological Congress Firenze, 2004 IDEA Project
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