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138 CHAPTER 3. TERRESTRIAL SYSTEMS<br />
controlled by the near surface and near bed-rock glacier dynamics). Based on external collaborations,<br />
dedicated atmospheric observations are deployed here at various alpine (Preunkert and Wagenbach,<br />
1998) and Antarctic sites (Wagenbach et al. 1998, Piel et al. 2005, which also include isotopic<br />
fingerprints of aerosol samples ( 15 N, 14 C, 26 Al). Within the glaciological issue, joint efforts range<br />
from ground penetrating radar soundings of the internal stratigraphy in alpine glaciers (Eisen et al.<br />
2003) and related glacio-meterological and glacio-chemical surveys, to the prospection of novel dating<br />
techniques ( 3 He/ 4 He (Friedrich, 2003), 14 C, 26 Al/ 10 Be).<br />
Overview on principal activities and achievements<br />
Alpine research<br />
a) EU- ALP-IMP related: Long term isotope records from two deep Mt. Blanc cores could be added<br />
to the already existing array of respective Monte Rosa records, enhancing the significance in the<br />
reconstruction of climate related changes (see 3.2.4). Site selection study of ideal drill site for high<br />
resolution records back to 1000 years by radar tracking of the internal layering by University Zürich<br />
(Böhlert, 2005) and drilling there to bedrock in collaboration with KUP of University Bern could be<br />
successfully achieved. First estimates indicate a net surface accumulation of the new site, significantly<br />
lower than 15 cm water per year, which may offer a relatively high time resolution in the bottom<br />
core section. A further intensive field campaign for sampling a special non-temperated ice cap at<br />
lower altitude was performed in collaboration with university Zürich, in order to prospect the basic<br />
stratigraphycal properties of this ice body (see 3.2.1) .<br />
b) EU-CARBOSOL project related: The first continuous records into the pre-industrial area of dissolved<br />
organic carbon (DOC) could be established (partly in seasonal resolution) (see 3.2.5). Also<br />
aimed at the long term change of the organic fraction of the aerosol body, the first radiocarbon investigations<br />
on european wide aerosol samples could be accomplished after final revision of the sample<br />
preparation line (see 3.2.2).<br />
Antarctica<br />
a) Related to EPICA: Field sampling of bottom core for He-isotope analyses could be accomplished<br />
at Berkner Island and at EPICA Dome C (actually the oldest ice available) drill sites. Respective<br />
mass spectrometric analyses by the ”Groundwater and Paleoclimate” group, along with noble gas ice<br />
core samples obtained from the previous campaigns are expected to come up in the near future.<br />
Investigation of the air firn transfer of 10 Be (and associated host particles) were extended from investigations<br />
at the central EPICA DML drill site(Piel et al. 2005) by a bi-annual record from a recent<br />
firn core obtained from coastal Berkner Island. In this context long term observations of atmospheric<br />
radionuclides at Neumayer Station were regularly continued (see 3.2.3).<br />
b)The Lake Vostok: Additional ice samples of the Vostok bottom ice core (accreted from Lake Vostok)<br />
as well as meteoric reference ice were obtained from LGGE-CRNS. Grenoble and analysed for dissolved<br />
organic Carbon, confirming the outstanding low DOC level, already obtained in previous pilot analyses<br />
(Bulat et al.2004) (see 3.2.5)<br />
c) New developments focussed on the extension of automatic aerosol sampling in central Antarctica<br />
and on the prospection of the 26 Al/ 10 Be dating tool, to be deployed for very old ice. (see 3.2.6)<br />
Novel activities envisaged in the following year Launching a radiocarbon dating project focussing<br />
on various non-temperated Alpine ice bodies (with VERA and University Zürich).<br />
Supplementing continuous flow ice core analyses by a screening method for the total gas content, as<br />
to infer the melt-layer stratigraphy (with Groundwater and Paleoclimate Group)<br />
Pilot studies on the Little Ice Age variability of 10 Be possibly archived in a new sediment core recovered<br />
from the well explored high alpine Schwarzsee ob Sölden (with University Innsbruck and Heidelberg<br />
Academy of Sciences)<br />
Re-designing of the Air Chemistry Observatory at the Antarctic Neumayer Station III (with AWI and<br />
the Carbon Cycle Group)<br />
Funding and major cooperations Funding relayed on the EU-projects CARBOSOL (Anthropogenic<br />
change of organic carbon aerosol in West- Europe)and ALP-IMP (Climate variability in the<br />
greater Alpine region), the AWI-Cooperation contract (Investigation of ice cores and aerosol of polar