التفاصيل البيبلوغرافية
| العنوان: |
Sea ice-related halogen enrichment at Law Dome, coastal East Antarctica. |
| المؤلفون: |
Vallelonga, Paul, Maffezzoli, Niccolo, Moy, Andrew D., Curran, Mark A. J., Vance, Tessa R., Edwards, Ross, Hughes, Gwyn, Barker, Emily, Spreen, Gunnar, Saiz-Lopez, Alfonso, Corella, J. Pablo, Cuevas, Carlos A., Spolaor, Andrea |
| المصدر: |
Climate of the Past Discussions; 2016, p1-26, 26p |
| مستخلص: |
The Law Dome site is ideal for the evaluation of sea ice proxies due to its location near to the Antarctic coast, regular and high accumulation throughout the year, an absence of surface melting or remobilization, and minimal multiyear sea ice. We present records of bromine and iodine concentrations and their enrichment beyond seawater compositions, arguing that halogen enrichment is indicative of the local sea ice area, particularly the 90-110° E sector of the Wilkes coast. Our findings support the results of previous studies of sea ice variability from Law Dome, indicating that Wilkes coast sea ice area is currently at its lowest level since the start of the 20th century. From the Law Dome DSS1213 firn core, 26 years of monthly deposition data indicate that the period of peak bromine enrichment is during Austral spring-summer, from November to February. Results from a traverse along the lee (Western) side of Law Dome show low levels of sodium and bromine deposition, with the greatest fluxes in the vicinity of the Law Dome summit. Finally, iodine enrichment is well correlated to that of bromine, indicating a common, sea ice source for their enrichment. [ABSTRACT FROM AUTHOR] |
|
Copyright of Climate of the Past Discussions is the property of Copernicus Gesellschaft mbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Full Text Finder