While looking at the Journal Article:'Antarctic temperature and global sea level closely coupled over the past five glacial cycles' in the Journal: Nature Geoscience I have found we need a statement from your Author Andrew Roberts, as according to the byline it seems they were at another location. An reply email to me will be sufficient.Could you please confirm if the author is willing to sign a statement of affiliation to the ANU so it can be added to this record in the HERDC data collection.If this research was not done with the ANU then we will move this record to an 'Ext C1' and it may be considered for the ERA collection in future years.

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[1] Observations since the 1950s suggest that the Arctic climate system is changing in response to rising global air temperatures. These changes include an intensified hydrological cycle, Arctic sea ice decline, and increasing Greenland glacial melt. Here we use new d 18 O data from the East Greenland Current system at Cape Farewell and Denmark Strait to determine the relative proportions of the freshwater components within the East Greenland Current and East Greenland Coastal Current. Through the comparison of these new data with historical studies, we gain insight into the changing Arctic freshwater balance. We detect three key shifts in the net freshwater component d 18 O values, these are (1) a shift to lighter values in the late 1990s that possibly indicates an increased Greenland glacial melt or a reduced sea ice melt admixture and (2) a shortterm shift to a ∼10‰ heavier value in 2005 followed by (3) a shift back to the historic average value in 2008. The latter fluctuation reflects a short-term dramatic rise and fall of sea ice meltwater addition into the East Greenland Current system. We infer that this anomalously large inclusion of sea ice meltwater resulted from a short-term peak in Arctic sea ice export via Fram Strait. Our findings, therefore, suggest that the freshwater carried in the East Greenland Current system is susceptible to short-term, high-amplitude changes in the upstream freshwater balance, which may have important ramifications for the global thermohaline circulation through the suppression of deep water formation in the North Atlantic.

We introduce a new technique to routinely determine the 18 O/ 16O ratio of O 2 (aq) from 12-mL Exetainer  vials. Results were expressed in a δ-notation versus air and the Vienna Standard Mean Ocean Water (VSMOW). Samples were prepared by creating a He-headspace and stripping O 2 (aq) from solution by shaking for 30 min on a wrist shaker. Subsequent isotope analysis of the extracted O 2 (g) was achieved by converting the entire headspace into a large sampling loop using a double-hole needle. This enabled admission of sufficient O 2 (g) into a packed A5-Å-molecular sieve column, where it was separated from N 2 before admission to the isotope ratio mass spectrometer. The latter was tuned to an m/z ratio of 32, thus enabling direct determination of molecular O 2 (g) without conversion to CO 2 . External standards consisted of dry air samples in helium-flushed vials and had between 1.5 and 16.8 parts per thousand O 2 (g) in a He matrix and a known isotopic composition of 0‰ air (+23.8‰ VSMOW). The method allows automated analyses of up to ~180 samples in one single batch and will provide new quantitative information about oxygen turnover in aqueous systems, including rates of gas transfer, redox processes, respiration, and photosynthesis. Repeat δ 18O O2(aq) measurements on samples with concentrations between 15.6 µmol L -1 and saturation revealed standard deviations of 0.3‰. This is a typical precision encountered in continuous flow applications, and the method is available for studies using either 18 O-labeled water to evaluate O 2 gross production by incubation experiments or for natural abundance studies when isotope shifts are larger than 0.8‰. It may also become useful in microbiological and medical applications and can serve to quantify plant-gas exchange and soil gas processes.

Previous work on oxygen and hydrogen isotope data from Eastern Mediterranean water samples has defined a mixing relationship in this region that is different from the world surface ocean. This prompted speculations about the hydrological processes in the Mediterranean region. We present new δ¹⁸O and δD data from the Eastern Mediterranean region and the East Greenland Current system, spanning a wide salinity range. These data define δ¹⁸O:δD relationships for both regions that are consistent with the world surface ocean δ¹⁸O:δD relationship, despite the highly evaporative conditions that prevail in the Mediterranean region. These new geochemical data have suggested that the world surface ocean &delta¹⁸O:δD relationship holds throughout almost the entire global salinity range