新着論文紹介 This Week's New Paper（2011/1/11）

☆ Science 7 January 2011 , volume 331☆

1. The Origins of Hot Plasma in the Solar Corona

B. De Pontieu, S. W. McIntosh, M. Carlsson, V. H. Hansteen, T. D. Tarbell, P. Boerner, J. Martinez-Sykora, C. J. Schrijver, A. M. Title

DOI: 10.1126/science.1197738

2. Small Interannual Variability of Global Atmospheric Hydroxyl

S. A. Montzka, M. Krol, E. Dlugokencky, B. Hall, P. Jo ̈ckel, J. Lelieveld,

DOI: 10.1126/science.1197640

3. The Role of Ammonites in the Mesozoic Marine Food Web Revealed by Jaw Preservation

Isabelle Kruta, Neil Landman, Isabelle Rouget, Fabrizio Cecca, Paul Tafforeau

DOI: 10.1126/science.1198793

☆ Nature 6 January 2011 , volume 469☆

4. Geochemical evidence for widespread euxinia in the Later Cambrian ocean

Benjamin C. Gill, Timothy W. Lyons, Seth A. Young, Lee R. Kump, Andrew H. Knoll & Matthew R. Saltzman

doi:10.1038/nature09700

☆ Geology January 2011 , volume 39, Issue1☆

5. Cosmogenic nuclide evidence for enhanced sensitivity of an East Antarctic ice stream to change during the last deglaciation

Duanne A. White, David Fink and Damian B. Gore

DOI: 10.1130/G31591.1

☆ Nature Geoscience January 2011 , volume 4, No 1☆

6.Expression of the bipolar see-saw in Antarctic climate records during the last deglaciation

B. Stenni, D. Buiron, M. Frezzotti, S. Albani, C. Barbante, E. Bard, J. M. Barnola, M. Baroni, M. Baumgartner, M. Bonazza, E. Capron, E. Castellano, J. Chappellaz, B. Delmonte, S. Falourd, L. Genoni, P. Iacumin, J. Jouzel, S. Kipfstuhl, A. Landais, B. Lemieux-Dudon, V. Maggi, V. Masson-Delmotte, C. Mazzola, B. Minster, M. Montagnat, R. Mulvaney, B. Narcisi, H. Oerter, F. Parrenin, J. R. Petit, C. Ritz, C. Scarchilli, A. Schilt, S. Schüpbach, J. Schwander, E. Selmo, M. Severi, T. F. Stocker & R. Udisti

doi:10.1038/ngeo1026

新着論文紹介 This week’s new papers (2011/01/11)

☆Proceedings of the National Academy of Sciences☆ 2010/12/28-2011/1/4

North Atlantic summers have warmed more than winters since 1353, and the response of marine zooplankton
Nicholas A. Kamenos
PNAS 2010 107 (52) 22442-22447; doi:10.1073/pnas.1006141107
→北東大西洋の水温を復元すると、西暦1353年から2006年にかけて、夏季の方が冬季よりも上昇していて、動物プランクトンの量も減っているらしい。

Nanodiamonds do not provide unique evidence for a Younger Dryas impact
H. Tian, D. Schryvers, and Ph. Claeys
PNAS 2011 108 (1) 40-44; published ahead of print December 20, 2010, doi:10.1073/pnas.1007695108
→Younger Dryasの地層に見られるナノダイアモンドを詳しく調べると、成因を隕石衝突と限定するのは難しいらしい。

Global declines in oceanic nitrification rates as a consequence of ocean acidification
J. Michael Beman, Cheryl-Emiliane Chow, Andrew L. King, Yuanyuan Feng, Jed A. Fuhrman, Andreas Andersson, Nicholas R. Bates, Brian N. Popp, and David A. Hutchins
PNAS 2011 108 (1) 208-213; published ahead of print December 20, 2010, doi:10.1073/pnas.1011053108
→海洋酸性化に伴って、海洋微生物によるアンモニア酸化の速度が低下する見込みで、海洋の窒素循環・栄養塩分布に影響がありそう。来週の地球環境セミナーで発表します。


☆JGR-Biogeoscience☆ 2010/12/21-2011/1/10

Relative influences of solution composition and presence of intracrystalline proteins on magnesium incorporation in calcium carbonate minerals: Insight into vital effects
Hermans, J., L. André, J. Navez, P. Pernet, and P. Dubois (2011)
J. Geophys. Res., 116, G01001, doi:10.1029/2010JG001487.
→炭酸カルシウムのMg/Ca比に対するvital effectsの理解を進めるため、溶液のMg濃度や高分子有機物（ウニから抽出）濃度を変えて、鉱物形成実験。有機物の種類の影響もあり。


☆Paleoceanography☆ 2010/12/14-12/20

Climate and biogeochemical response to a rapid melting of the West Antarctic Ice Sheet during interglacials and implications for future climate
Menviel, L., A. Timmermann, O. E. Timm, and A. Mouchet (2010)
Paleoceanography, 25, PA4231, doi:10.1029/2009PA001892
→西南極氷床が間氷期に融解したときに気候・炭素循環に与える影響を、LOVECLIMを用いてモデル実験して評価。海氷面積の拡大、南半球偏西風の強化、南極深層水形成の弱化、深海温度の上昇（→さらに西南極氷床が融解する正のフィードバック）などの影響が見られた。CO2濃度は変わらないらしい。MIS5eの記録と一致？

Indo-Pacific Warm Pool variability during the Holocene and Last Glacial Maximum
Xu, J., W. Kuhnt, A. Holbourn, M. Regenberg, and N. Andersen (2010)
Paleoceanography, 25, PA4230, doi:10.1029/2010PA001934
→インド洋暖水塊のLGM, 8-9ka, 0-2kaでの変動を、浮遊性有孔虫のMg/Caと酸素同位体組成から復元。南シナ海、ティモール海、インドネシア海、西太平洋の24地点。

Benthic foraminiferal oxygen isotope offsets over the last glacial-interglacial cycle
Hoogakker, B., H. Elderfield, K. Oliver, and S. Crowhurst (2010)
Paleoceanography, 25, PA4229, doi:10.1029/2009PA001870

Orbital tuning, eccentricity, and the frequency modulation of climatic precession
Huybers, P., and O. Aharonson (2010)
Paleoceanography, 25, PA4228, doi:10.1029/2010PA001952


☆Earth and Planetary Science Letters☆ 15 January 2011

Strong climate and tectonic control on plagioclase weathering in granitic terrain
C. Rasmussen, S. Brantley, D. deB. Richter, A. Blum, J. Dixon, A.F. White
Earth and Planetary Science Letters, Volume 301, Issues 3-4, 15 January 2011, Pages 521-530
→花崗岩地形の化学風化について、Naをplagioclase風化の指標として、様々な気候におけるデータをコンパイル。気候、特に降水量が効くらしい。


☆Geochimica et Cosmochimica Acta☆ 1 February 2011

Climatic dependence of stable carbon and oxygen isotope signals recorded in speleothems: From soil water to speleothem calcite
Wolfgang Dreybrodt, Denis Scholz
Geochimica et Cosmochimica Acta, Volume 75, Issue 3, 1 February 2011, Pages 734-752
→土壌水中のCO2が鍾乳石になるまでの、炭素同位体・酸素同位体組成の変化を詳細に追跡した。

Controls on dissolved inorganic carbon and δ13C in cave waters from DeSoto Caverns: Implications for speleothem δ13C assessments
W. Joe Lambert, Paul Aharon
Geochimica et Cosmochimica Acta, Volume 75, Issue 3, 1 February 2011, Pages 753-768
→南東USAの鍾乳石で、DICの濃度と炭素同位体組成を3年間分析して、鍾乳石炭素同位体組成の規定要因を探った。


☆Organic Geochemistry☆ January 2011

Core top TEX86 values in the south and equatorial Pacific
Sze Ling Ho, Masanobu Yamamoto, Gesine Mollenhauer, Masao Minagawa
Organic Geochemistry, Volume 42, Issue 1, January 2011, Pages 94-99
→南・赤道太平洋でTEX86のコアトップキャリブレーション。TEX86-H（温暖域用）は全球キャリブレーション式と合うけど、TEX86-L（寒冷域用）はあまり合わない。

Occurrence of tetraether lipids in stalagmites: Implications for sources and GDGT-based proxies
Huan Yang, Weihua Ding, Chuanlun L. Zhang, Xia Wu, Xiufeng Ma, Gangqiang He, Junhua Huang, Shucheng Xie
Organic Geochemistry, Volume 42, Issue 1, January 2011, Pages 108-115
→石筍に含まれるアーキア・バクテリアのGDGTs脂質（温度のプロキシとされる）。TEX86は酸素同位体組成と逆相関で、モンスーンの強化時には温度が高かったことを示す？　MBT/CBT indexは温度以外に様々な要素に影響を受けている模様。


☆Chemical Geology☆ 24 January 2011

Identification and composition of secondary meniscus calcite in fossil coral and the effect on predicted sea surface temperature
Paul Dalbeck, Maggie Cusack, Phillip S. Dobson, Nicola Allison, Anthony E. Fallick, Alexander W. Tudhope and EIMF
Chemical Geology, Volume 280, Issues 3-4, 24 January 2011, Pages 314-322
→化石サンゴに含まれる二次鉱物をEBSDと原子間力顕微鏡で調べた。Sr/Caは二次鉱物の影響を受けると水温推定が高めになるがが、酸素同位体組成は二次鉱物が入ってもあまり変わらない。


☆Quaternary Science Reviews☆ January 2011

Contributions and unrealized potential contributions of cosmogenic-nuclide exposure dating to glacier chronology, 1990–2010
Greg Balco
Quaternary Science Reviews, Volume 30, Issues 1-2, January 2011, Pages 3-27
→過去20年間に行われた、宇宙線生成核種による氷河の年代決定の研究のレビュー。

A global context for megadroughts in monsoon Asia during the past millennium
Ashish Sinha, Lowell Stott, Max Berkelhammer, Hai Cheng, R. Lawrence Edwards, Brendan Buckley, Mark Aldenderfer, Manfred Mudelsee
Quaternary Science Reviews, Volume 30, Issues 1-2, January 2011, Pages 47-62
→14-15世紀のアジアモンスーンに復元された大干魃（megadroughts）の、メカニズムや影響について。

Reconstructing climate variability on the northeastern Tibetan Plateau since the last Lateglacial – a multi-proxy, dual-site approach comparing terrestrial and aquatic signals
Juliane Wischnewski, Steffen Mischke, Yongbo Wang, Ulrike Herzschuh
Quaternary Science Reviews, Volume 30, Issues 1-2, January 2011, Pages 82-97
→チベット高原のKuhai湖の堆積物コアから、最終後氷期以降の気候を復元。近くのKoucha湖の記録と比較。

Speleothem record of the last 180 ka in Villars cave (SW France): Investigation of a large δ18O shift between MIS6 and MIS5
K. Wainer, D. Genty, D. Blamart, M. Daëron, M. Bar-Matthews, H. Vonhof, Y. Dublyansky, E. Pons-Branchu, L. Thomas, P. van Calsteren, Yves Quinif, N. Caillon
Quaternary Science Reviews, Volume 30, Issues 1-2, January 2011, Pages 130-146
→ヨーロッパで初めて180kaまでさかのぼる鍾乳石記録を入手。U-Th年代決定、酸素同位体組成、clumped isotope。

Paleoglaciological reconstructions for the Tibetan Plateau during the last glacial cycle: evaluating numerical ice sheet simulations driven by GCM-ensembles
Nina Kirchner, Ralf Greve, Arjen P. Stroeven, Jakob Heyman
Quaternary Science Reviews, Volume 30, Issues 1-2, January 2011, Pages 248-267


☆Quaternary International☆ 15 January 2011

特集
Quaternary Sea Level and Palaeoenvironmental Reconstructions in the Coastal Zone of East and Southeast Asia
Edited by Adam Switzer, Yoshiki Saito, Yusuke Yokoyama and Norm Catto
Quaternary International, Volume 230, Issues 1-2, Pages 1-122


☆Palaeogeography, Palaeoclimatology, Palaeoecology☆ 1 January 2011

Mid-Holocene coral community data as baselines for understanding contemporary reef ecological states
Ronan C. Roche, Chris T. Perry, Kenneth G. Johnson, Kerry Sultana, Scott G. Smithers, Angus A. Thompson
Palaeogeography, Palaeoclimatology, Palaeoecology, Volume 299, Issues 1-2, 1 January 2011, Pages 159-167
→Great Barrier Reefの中期Holoceneの化石サンゴ礁群集。

MIS 21 and the Mid-Pleistocene climate transition: Climate and sea-level variation from a sediment core in Osaka Bay, Japan
Ikuko Kitaba, Mao Harada, Masayuki Hyodo, Shigehiro Katoh, Hiroshi Sato, Mariko Matsushita
Palaeogeography, Palaeoclimatology, Palaeoecology, Volume 299, Issues 1-2, 1 January 2011, Pages 227-239
→大阪湾の堆積物コアから、MIS21、MPTでの気候・海水準を復元。

Revisiting the stratigraphic position of the Matuyama–Brunhes geomagnetic polarity boundary in Chinese loess
Chunsheng Jin, Qingsong Liu
Palaeogeography, Palaeoclimatology, Palaeoecology, Volume 299, Issues 1-2, 1 January 2011, Pages 309-317


☆Marine Geology☆ 15 January 2011

Key species of hermatypic coral for reef formation in the northwest Pacific during Holocene sea-level change
Chuki Hongo, Hajime Kayanne
Marine Geology, Volume 279, Issues 1-4, 15 January 2011, Pages 162-177

Foraminifer isotope study of the Pleistocene Labrador Sea, northwest North Atlantic (IODP Sites 1302/03 and 1305), with emphasis on paleoceanographical differences between its "inner" and "outer" basins
Claude Hillaire-Marcel, Anne de Vernal, Jennifer McKay
Marine Geology, Volume 279, Issues 1-4, 15 January 2011, Pages 188-198

担当：山口保彦（D1）