New Papers (AGU • EGU etc…) 2013 4/1 – 4/7

n   Geochemistry, Geophysics, Geosystems

1.       Sulfide geochronology along the endeavour segment of the Juan de Fuca Ridge
John W. Jamieson, Mark D. Hannington, David A. Clague, Deborah S. Kelley, John R. Delaney, James F. Holden, Margaret K. Tivey, Linda E. Kimpe
doi: 10.1002/ggge.20133
Key Points:
Jun de Fuca Ridge, the decay of 226Ra, hydrothermal venting

n   Geophysical Research Letters

2.       Annual/semiannual variation of the ionosphere
Liying Qian, Alan G. Burns, Stanley C. Solomon, Wenbin Wang
doi: 10.1002/grl.50448
Key Points:
ionosphere, GPS radio occultation measurements

3.       California foreshock sequences suggest aseismic triggering process
Xiaowei Chen, Peter M. Shearer
doi: 10.1002/grl.50444
Key Points:
Earthquake prediction, foreshock

n   Journal of Geophysical Research C. Oceans

4.       The role of asymmetric tidal mixing in the subtidal dynamics of narrow estuaries
Peng Cheng, Huib E. Swart, Arnoldo Valle-Levinson
doi: 10.1002/jgrc.20189
Key Points:
tidal asymmetry; estuarine dynamics; residual currents

5.       Variations in the Pacific decadal oscillation since 1853 in a coral record from the northern South China Sea
Wenfeng Deng, Gangjian Wei, Luhua Xie, Ting Ke, Zhibing Wang, Ti Zeng, Ying Liu
doi: 10.1002/jgrc.20180
Key Points:
Pacific Decadal Oscillation; coral; South China Sea
南シナ海での2011年に取られたサンゴを用いたPDOの復元.指標としてはSr/Ca, δ13C, δ18Oを用いている.PDOの変動は降水量と相関が良く合うことが分かった.Sr/Caは海水温と陸域からの雨水の影響を受け、δ18Oは主に陸域からの雨水の影響を受け、δ13Cはスエス効果の影響を受けているとし、PDOの変動は主にδ18Oで復元できるとしている.

6.       Southern Ocean nutrient trapping and the efficiency of the biological pump
François W. Primeau, Mark Holzer, Timothy DeVries
doi: 10.1002/jgrc.20181
Key Points:
phosphate; biological pump;Southern Ocean; data assimilation; ocean model; biological production

n   Global Biogeochemical Cycles

7.       210Pb and 137Cs in Margin Sediments of the Arctic Ocean: Controls on Boundary Scavenging
Zou Zou A. Kuzyk, Charles Gobeil, Robie W. Macdonald
doi: 10.1002/gbc.20041
Key Points:
Arctic Ocean; continental margin; boundary scavenging; sediment

n   Climate of the Past

8.       Using data assimilation to investigate the causes of Southern Hemisphere high latitude cooling from 10 to 8 ka BP
P. Mathiot, H. Goosse, X. Crosta, B. Stenni, M. Braida, H. Renssen, C. J. Van Meerbeeck, V. Masson-Delmotte, A. Mairesse, and S. Dubinkina
Key Points:
atmospheric circulation, sea surface temperature
10 kaから8 kaの南半球高緯度の寒冷化について.大気循環の変化と海水温の低下を寒冷化の原因にあげ、大気循環の変化が0.5 ºCの気温の低下をもたらし、西南極からの淡水の流入が0.7 ºCの海水温の低下を引き起こしたとしている.

n   Paleoceanography
n   Geological Society of American Bulletin