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&#xD;
Funding was provided by:&#xD;
&#xD;
NERC ENVISION Doctoral Training Centre (NE/L002604/1).&#xD;
NERC and the German Federal Ministry of Education and Research (BMBF) funded Changing Arctic Ocean program EISPAC project (NE/R012857/1).&#xD;
British Antarctic Survey Collaboration Voucher.&#xD;
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