New papers from AGU, EGU… (2017/12/4~10)

Climate of the Past

1. Late Oligocene obliquity-paced contourite sedimentation in the Wilkes Land margin of East  Antarctica: implications for paleoceanographic and ice sheet configurations

Ariadna Salabarnada, Carlota Escutia, Ursula Röhl, C. Hans Nelson, Robert McKay, Francisco F. Jiménez-Espejo, Peter K. Bijl, Julian D. Hartman, Minoru Ikehara, Stephanie L. Strother, Ulrich Salzmann, Dimitris Evangelinos, Adrián López-Quirós, José Abel Flores, Francesca Sangiorgi, and Henk Brinkhuis

2. Oligocene–Miocene paleoceanography off the Wilkes Land Margin (East Antarctica) based on organic-walled dinoflagellate cysts

Peter K. Bijl, Alexander J. P. Houben, Julian D. Hartman, Jörg Pross, Ariadna Salabarnada, Carlota Escutia, and Francesca Sangiorgi

3. Three distinct Holocene intervals of stalagmite deposition and nondeposition revealed in NW Madagascar, and their paleoclimate implications

Ny Riavo Gilbertinie Voarintsoa, Loren Bruce Railsback, George Albert Brook, Lixin Wang, Gayatri Kathayat, Hai Cheng, Xianglei Li, Richard Lawrence Edwards, Amos Fety Michel Rakotondrazafy, and Marie Olga Madison Razanatseheno

Journal of Geophysical Research - Oceans

4. Ice-Shelf Melt Response to Changing Winds and Glacier Dynamics in the Amundsen Sea Sector, Antarctica

Marion Donat-Magnin, Nicolas C. Jourdain, Paul Spence, Julien Le Sommer, Hubert Gallée, Gaël Durand

Geochemistry, Geophysics, Geosystems

5. A New Chronology of Late Quaternary Sequences From the Central Arctic Ocean Based on “Extinction Ages” of Their Excesses in ²³¹Pa and ²³⁰Th

C. Hillaire-Marcel, B. Ghaleb, A. de Vernal, J. Maccali, K. Cuny, A. Jacobel, C. Le Duc, J. McManus

Geophysical Research Letters

6. Observation-based Trends of the Southern Ocean Carbon Sink

R. Ritter, P. Landschützer, N. Gruber, A. R. Fay, Y. Iida, S. Jones, S. Nakaoka, G.-H. Park, P. Peylin, C. Rödenbeck, K. B. Rodgers, J. D. Shutler, J. Zeng

2017/12/05 New Papers(Nature, etc)

2017/11/27~12/3

PNAS

1. Causes of ice age intensification across the Mid-Pleistocene Transition

Thomas B. Chalk, Mathis P. Hain, Gavin L. Foster, Eelco J. Rohling, Philip F. Sexton, Marcus P. S. Badger, Soraya G. Cherry, Adam P. Hasenfratz, Gerald H. Haug, Samuel L. Jaccard, Alfredo Martinez–Garcia, Heiko Palike, Richard D. Pancost, Paul A. Wilson

2. Coupled European and Greenland last glacial dust activity driven by North Atlantic climate

Gabor Uȷvari, Thomas Stevens, Mihaly Molnar, Attila Demeny, Fabrice Lambert, Gyorgy Varga, A. J. Timothy Jull, Barna Pall–Gergely, Jan–Pieter Buylaert, Janos Kovacs

Geology

Nature

Nature Climate Change

Nature Communication

Nature Geoscience

Science

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12月1日 Prof. Allan Chivas Farewell PARTY @Sushi Restaurant

この1ヶ月半ほど横山研究室で過ごされた Allan Chivas 先生がオーストラリアに帰られる日、ラボメンバーでFarewell Lunchをしました！

Chivas 先生にはセミナーやシンポジウムで講演していただき、また日々の研究室生活でもお世話になりました。ありがとうございました。

シーバス”Chivas”というスコッチウィスキーがありますよね、Chivas先生のおじいさんがスコットランド出身という話で納得でした。

我々は日頃、チーバ”Chivas”先生と呼んでいたので気がつきませんでした。

先日、Chivas先生のことをfrom ANUと記してしまいましたが、University of Wollongong (UOW)の間違いでした。すみません...（T_T）

ウーロンゴン大学ですね、正確にはウォーロンかな？ヲゥーロンかな？どっちでもいいのかな？

Thank you.

New Papers 11/27 – 12/3 ,2017 (AGU)

 New Papers (AGU 11/27 – 12/3 ,2017)

Geochemistry, Geophysics, Geosystems

1. Environmental Controls on Mg/Ca in Neogloboquadrina incompta: A Core‐Top Study From the Subpolar North Atlantic

Audrey Morley, Tali L. Babila, James Wright, Ulysses Ninnemann, Kikki Kleiven, Nil Irvali, Yair Rosenthal

2. Bay of Bengal Exhibits Warming Trend During the Younger Dryas: Implications of AMOC

Champoungam Panmei, Pothuri Divakar Naidu, Mahyar Mohtadi

3. Sedimentary Mercury Enrichments as a Marker for Submarine Large Igneous Province Volcanism? Evidence From the Mid‐Cenomanian Event and Oceanic Anoxic Event 2 (Late Cretaceous)

J. D. Scaife, M. Ruhl, A. J. Dickson, T. A. Mather, H. C. Jenkyns, L. M. E. Percival, S. P. Hesselbo, J. Cartwright, J. S. Eldrett, S. C. Bergman, et al

Geophysical Research Letters

4. Evolving Impacts of Multiyear La Niña Events on Atmospheric Circulation and U.S. Drought

Yuko M. Okumura, Pedro DiNezio, Clara Deser

5. Permafrost Organic Carbon Mobilization From the Watershed to the Colville River Delta: Evidence From 14C Ramped Pyrolysis and Lignin Biomarkers

Xiaowen Zhang, Thomas S. Bianchi, Xingqian Cui, Brad E. Rosenheim, Chien‐Lu Ping, Andrea J. M. Hanna, Mikhail Kanevskiy, Kathryn M. Schreiner, Mead A. Allison

6. Strong Relations Between ENSO and the Arctic Oscillation in the North American Multimodel Ensemble

Michelle L. L'Heureux, Michael K. Tippett, Arun Kumar, Amy H. Butler, Laura M. Ciasto, Qinghua Ding, Kirstin J. Harnos, Nathaniel C. Johnson

Paleoceanography

7. Mid‐Piacenzian Variability of Nordic Seas Surface Circulation Linked to Terrestrial Climatic Change in Norway

Sina Panitz, Stijn De Schepper, Ulrich Salzmann, Paul E. Bachem, Bjørg Risebrobakken, Caroline Clotten, Emma P. Hocking

8. Sea Surface Temperatures in the Eastern Equatorial Pacific and Surface Temperatures in the Eastern Cordillera of Colombia during El Niño: Implications for Pliocene Conditions

Lina C. Pérez‐Angel, Peter Molnar

Dr. Steven J. Phipps from University of Tasmania によるセミナー

11月28日、University of Tasmania から横山研究室に訪問されたSteven J. Phipps 先生に、ご自身の研究内容についてのセミナーをしていただきました。

Steven 先生は古気候や氷床のモデルを専門に研究されており、モデルを用いたシミュレーションで南極の氷床変動についての予測を行なっています。

Steven 先生による氷床モデルの説明

南極の氷床が融解することによる海面上昇は、COP21などでも大きく取り上げられた問題の一つです。

「更なる研究の進展には、より多くのサンプルが必要である」という先生の主張が印象的でした。

セミナーの様子