Allan Chivas先生のセミナー

こんにちは、M1の雨川(あめかわ)です。

5月26日に、オーストラリアのウーロンゴン大学からAllan Chivas先生を、産業技術総合研究所から斉藤文紀先生をお招きしました。

Chivas先生は国際第四紀学連合(INQUA)という大きな国際学会の前会長です。2015年に初めて日本でINQUAが行われることになっており、斉藤先生はその準備委員会の委員長を務めておられます。Chivas先生はその視察にいらしていたようで、オーストラリアにお帰りになる前に大気海洋研究所に寄っていただきました。

Chivas先生に研究を紹介する恒川さん

昼食は1階「はま」さんのお弁当

午後にはChivas先生によるセミナーを開催いたしました。

Charophyteという藻類の一種が形成する炭酸塩を分析して、新たな(古)環境指標として用いるための研究を紹介していただきました。

余談ですが、その日の夜に翌日のセミナー発表の準備で調べ物をしていたところ、Chivas先生の論文に出会いました。約30年前の研究で、当時世界で初めて貝形虫(ostracod)の炭酸塩中の微量元素と環境との関係を明らかにされたそうです。

当時から今も変わらず、新しい研究分野の開拓をしていらっしゃる様子が伺えました。

最前列で写真をとりましたっ！

Chivas先生、ありがとうございました！

This Week’s New Papers (2014/5/27) AGU, EGU, GSA

[AGU]

☆ Geophysical Research Letters☆

2014/05/19-2014/05/25

1. Sinking velocity of particulate radiocesium in the northwestern North Pacific

Makio C. Honda and Hajime Kawakami

DOI: 10.1002/2014GL060126

Keywords: TEPCO Fukushima Daiichi Nuclear Power Plant accident; radiocesium; marine snow; sediment trap; sinking velocity

2. Abyssal ocean warming around Antarctica strengthens the Atlantic Overturning Circulation

Lavinia Patara and Claus W. Böning

DOI: 10.1002/2014GL059923

Keywords: Antarctic Bottom Water; abyssal ocean warming; Atlantic meridional overturning circulation; North Atlantic; Southern Ocean

3. Positive response of Indian summer rainfall to Middle East dust

Qinjian Jin, Jiangfeng Wei and Zong-Liang Yang

DOI: 10.1002/2014GL059980

Keywords: dust aerosols; Indian monsoon; rainfall

4. Optimal Growth of Central and East Pacific ENSO Events

Daniel J. Vimont, Michael A. Alexander and Matthew Newman

DOI: 10.1002/2014GL059997

Keywords: ENSO; central-Pacific ENSO; eastern-Pacific ENSO; El Niño Modoki; Meridional Mode

5. Potential for extreme loss in high–latitude Earth surface processes due to climate change

Juha Aalto, Ari Venäläinen, Risto K. Heikkinen and Miska Luoto

DOI: 10.1002/2014GL060095

Keywords: Earth surface processes; Climate change; High-latitude environments; Ensemble modeling; Periglacial geomorphology; Climate scenario

6. The seasonality of Antarctic sea ice trends

Paul R. Holland

DOI: 10.1002/2014GL060172

Keywords: Antarctica; sea ice

☆Journal of Geophysical Resarch C. Oceans☆

2014/05/19-2014/05/25

7. Climate change projection in the Northwest Pacific marginal seas through dynamic downscaling

Gwang-Ho Seo, Yang-Ki Cho, Byoung-Ju Choi, Kwang-Yul Kim, Bong-guk Kim and Yong-jin Tak

DOI: 10.1002/2013JC009646

Keywords: climate change model; Northwest Pacific; Yellow Sea; East China Sea; East/Japan Sea; downscaling

8. Variation in the Kuroshio intrusion: Modeling and interpretation of observations collected around the Luzon Strait from July 2009 to March 2011

Yaochu Yuan, Yu-heng Tseng, Chenghao Yang, Guanghong Liao, Chun Hoe Chow, Zenghong Liu, Xiao-Hua Zhu and Hong Chen

DOI: 10.1002/2013JC009776

Keywords: Currents in the Luzon Strait; Current measurements; HYCOM; Kuroshio Intrusion; Dynamics of the Kuroshio intrusion; Seasonal and interannual scales

9. Linkage between the Pacific Decadal Oscillation and the low frequency variability of the Pacific Subtropical Cell

Lingya Hong, Liping Zhang, Zhaohui Chen and Lixin Wu

DOI: 10.1002/2013JC009650

Keywords: STC; decadal variability; PDO; SODA; buoyancy forced adjustment; horizontal gyre advection

10. Interannual variations of Kuroshio transport in the East China Sea and its relation to the Pacific Decadal Oscillation and mesoscale eddies

Endro Soeyanto, Xinyu Guo, Jun Ono and Yasumasa Miyazawa

DOI: 10.1002/2013JC009529

Keywords: Kuroshio transport; mesoscale eddy; PDO index; East China Sea

☆ Global Biogeochemical Cycles☆

2014/05/19-2014/05/25

11. Experimental assessment of diazotroph responses to elevated seawater pCO2 in the North Pacific Subtropical Gyre

Daniela Böttjer, David M. Karl, Ricardo M. Letelier, Donn A. Viviani and Matthew J. Church

DOI: 10.1002/2013GB004690

Keywords: Nitrogen fixation; diazotrophs; CO2; Ocean acidification; North Pacific Subtropical Gyre; Station ALOHA

☆ Geochemistry, Geophysics, Geosystems☆

2014/05/19-2014/05/25

特になし

☆ Paleoceanography☆

2014/05/19-2014/05/25

新着なし

[EGU]

☆Climate of the Past☆

2014/05/19-2014/05/25

12. Evaluation of the ability of the Chinese stalagmite δ18O to record the variation in atmospheric circulation during the second half of the 20th century

Author(s): S. Nan, M. Tan, and P. Zhao

doi:10.5194/cp-10-975-2014

13. High resolution measurements of carbon monoxide along a late Holocene Greenland ice core: evidence for in situ production

Author(s): X. Faïn, J. Chappellaz, R. H. Rhodes, C. Stowasser, T. Blunier, J. R. McConnell, E. J. Brook, S. Preunkert, M. Legrand, T. Debois, and D. Romanini

doi:10.5194/cp-10-987-2014

14. Late Pliocene and Early Pleistocene vegetation history of northeastern Russian Arctic inferred from the Lake El'gygytgyn pollen record

Author(s): A. A. Andreev, P. E. Tarasov, V. Wennrich, E. Raschke, U. Herzschuh, N. R. Nowaczyk, J. Brigham-Grette, and M. Melles

doi:10.5194/cp-10-1017-2014

15. Volcanic ash layers in Lake El'gygytgyn: eight new regionally significant chronostratigraphic markers for western Beringia

Author(s): C. van den Bogaard, B. J. L. Jensen, N. J. G. Pearce, D. G. Froese, M. V. Portnyagin, V. V. Ponomareva, and V. Wennrich

doi:10.5194/cp-10-1041-2014

[GSA]

☆ GSA Bull.☆

2014/05/19-2014/05/25

16. Postglacial denudation of western Tibetan Plateau margin outpaced by long-term exhumation

Henry Munack, Oliver Korup, Alberto Resentini, Mara Limonta, Eduardo Garzanti, Jan H. Blöthe, Dirk Scherler, Hella Wittmann and Peter W. Kubik
doi: 10.1130/B30979.1

Journal Review 20 – 27 May 2014 (Nature, Science, PNAS, Geology)

NATURE

1. Astrophysics: Windy stars that go with a bang
Eldridge, J., J. (2014) Nature 509:431-432.
News & Views. Full Article

2. Earth science: Fertile fields for seismicity
Lundgren, P. (2014) Nature 509:436-437.
News & Views. Full Article

3. Uplift and seismicity driven by groundwater depletion in central California
Amos, C., B., P. Audet, W. Hammond, C., R. Burgmann, I. Johanson, A., and G. Blewitt (2014) Nature 509:483-486.
Letter. Full Article

4. Glaciology: Antarctic area is doomed to melt(2014) Nature 509:403-403.

Research Highlights. Full Article

5. Future increases in Arctic precipitation linked to local evaporation and sea-ice retreat
Bintanja, R., and F. M. Selten (2014) Nature 509:479-482.
Letter. Full Article


SCIENCE

6. Mechanisms of reef coral resistance to future climate change
Palumbi, S., R., D. Barshis, J., N. Traylor-Knowles, and R. Bay, A. (2014) Science Science 344:895-898.
10.1126/science.1251336. Full Article


PNAS

7. Climate change and forest fires synergistically drive widespread melt events of the Greenland Ice Sheet
Keegan, K., M., M. Albert, R., J. McConnell, R., and I. Baker (2014) Proceedings of the National Academy of Sciences Proceedings of the National Academy of Sciences
10.1073/pnas.1405397111. Full Article

8. Spatially robust estimates of biological nitrogen (N) fixation imply substantial human alteration of the tropical N cycle
Sullivan, B., W., W. K. Smith, A. Townsend, R., M. Nasto, K., S. Reed, C., R. Chazdon, L., and C. Cleveland, C. (2014) Proceedings of the National Academy of Sciences Proceedings of the National Academy of Sciences
10.1073/pnas.1320646111. Full Article


GEOLOGY

9. Paleomagnetism reveals the emplacement age of tsunamigenic coral boulders on Ishigaki Island, Japan
Sato, T., N. Nakamura, K. Goto, Y. Kumagai, H. Nagahama, and K. Minoura (2014) Geology Geology
10.1130/G35366.1. Full Article

第５回 大気海洋研究所 地球表層圏変動研究センターサイエンスカフェ 開催決定！！

6月27日(金)に本郷で開催される「サイエンスカフェ」でゲスト講師として横山先生が講演されます！

タイトルは「温故知新：”パレオ”が明らかにする表層環境システム」です。

前半は講義、後半は立食形式となっており、様々なお話が聞ける絶好の機会です！

定員が40名と少ないのでお早めにお申し込み下さい！

概要

日時：6月27日(金)　18:30 - 20:30

場所：東京大学本郷キャンパス　山上会館レストラン「御殿」

定員：40名

参加費：1000円

詳細に関しては特設ページをご覧下さい。

新着論文紹介 This Week’s New Paper (2014/5/20) Elsevier

☆Earth and Planetary Science Letters☆

1.    Coral-based history of lead and lead isotopes of the surface Indian Ocean since the mid-20th century

Jong-Mi Lee , Edward A. Boyle , Intan Suci Nurhati , Miriam Pfeiffer , Aron J. Meltzner , Bambang Suwargadi

doi: 10.1016/j.epsl.2014.04.030

Keywords

lead; lead isotopes; Pb; Pb isotopes; Indian Ocean; coral

☆Palaeogeography, Palaeoclimatology, Palaeoecology☆

2.  Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands Region: The cryptotephra record

P.M. Abbott , W.E.N. Austin , S.M. Davies , N.J.G. Pearce , T.L. Rasmussen , S. Wastegård , J. Brendryen

doi: 10.1016/j.palaeo.2014.05.004

Keywords

volcanic ash; Iceland; marine sequences; isochrons; palaeoclimatic synchronisation

3.  New evidence on deglacial climatic variability from an alpine lacustrine record in northwestern Yunnan Province, southwestern China

Xiayun Xiao , Simon G. Haberle , Xiangdong Yang , Ji Shen , Yong Han , Sumin Wang

doi: 10.1016/j.palaeo.2014.04.008

Keywords

Pollen analysis; Abrupt climate events; Southwest monsoon; Last deglaciation; Alpine lake; Southwestern China

☆Quaternary International☆

4.  Testing the model for linking grain-size component to lake level status of modern clastic lakes

Jule Xiao , Jiawei Fan , Dayou Zhai , Ruilin Wen , Xiaoguang Qin

doi: 10.1016/j.quaint.2014.04.023

Keywords

Dali Lake; Polymodal sediment; Grain-size component; Lake-level status; Model

5.  Archaeological and geomorphological indicators of the historical sea level changes and the related palaeogeographical reconstruction of the ancient foreharbour of Lechaion, East Corinth Gulf (Greece)

N.D. Mourtzas , C. Kissas , E. Kolaiti

doi: 10.1016/j.quaint.2012.12.037

6.  Tracking Mid- to Late Holocene depositional environments by applying sedimentological, palaeontological and geochemical proxies, Amvrakikos coastal lagoon sediments, Western Greece, Mediterranean Sea

P. Avramidis , G. Iliopoulos , D. Panagiotaras , D. Papoulis , P. Lambropoulou , N. Kontopoulos , G. Siavalas , K. Christanis

doi: 10.1016/j.quaint.2013.09.006

7.  Changes of the three holy lakes in recent years and quantitative analysis of the influencing factors

Long Li , Jing Li , Xiaojun Yao , Jing Luo , Yongsheng Huang , Yaya Feng

doi: 10.1016/j.quaint.2014.04.051

Keywords

Lake water balance; Lake variation; The three holy lakes; Tibetan Plateau

☆Quaternary Research☆

8.  An analysis and comparison of observed Pleistocene South Carolina (USA) shoreline elevations with predicted elevations derived from Marine Oxygen Isotope Stages

William Richardson Doar III , Christopher George St. Clement Kendall

doi: 10.1016/j.yqres.2014.04.005

Keywords

Pleistocene stratigraphy; Sea-level reconstructions; Isostatic adjustment; Marine Oxygen Isotope Stages; Geologic mapping; Shorelines

 ☆Quaternary Science Reviews☆

9.  Subglacial sediment, proglacial lake-level and topographic controls on ice extent and lobe geometries during the Last Glacial Maximum in NW Russia

Eiliv Larsen , Ola Fredin , Maria Jensen , Denis Kuznetsov , Astrid Lyså , Dmitry Subetto

doi: 10.1016/j.quascirev.2013.02.018

Keywords

Ice sheet; Last Glacial Maximum; Ice–bed interface; Ice–lake interaction; Ice-lobe geometries; Ice-lobe dynamics

10. Holocene fluctuations of Bregne ice cap, Scoresby Sund, east Greenland: a proxy for climate along the Greenland Ice Sheet margin

Laura B. Levy , Meredith A. Kelly , Thomas V. Lowell , Brenda L. Hall , Laura A. Hempel , William M. Honsaker , Amanda R. Lusas , Jennifer A. Howley , Yarrow L. Axford

doi: 10.1016/j.quascirev.2013.06.024

Keywords

Greenland Ice Sheet; Holocene; Scoresby Sund; Greenland; ¹⁰Be dating; Lake sediment cores

11. Monsoon extremes and society over the past millennium on mainland Southeast Asia

Brendan M. Buckley , Roland Fletcher , Shi-Yu Simon Wang , Brian Zottoli , Christophe Pottier

doi: 10.1016/j.quascirev.2014.04.022

Keywords

Monsoon; Climate; ENSO; Angkor; Cambodia; Vietnam; Tonkin; Cochinchina; Society; Chronicles

こおりけずり！

こんにちはー。
M2の恒川です。

今年度初の氷削りを行いました。

およそ10万年前の南極の氷です。

この氷には10万年前の空気が気泡として含まれています。

お手伝い頂いた皆様、どうもありがとうございました！！

南極の氷です。写真だと気泡が見えないかな？

氷削りに慣れてきたようで、スムーズに削っています。

氷削り職人ですヽ(‘ ∇‘ )ノ

今回は横山先生にもお手伝いして頂きました！

進学ガイダンス

こんにちは、M1の都築です。

5月10日(土)に大気海洋研究所の進学ガイダンスがありました。

まず、始めに講堂で全体の説明があった後、ポスターによる説明があり、その後、分野ごとに分かれての詳しいガイダンスがありました。

横山研にもたくさんの学生が訪問してくださり、AMS棟や7階の実験室を見学しました。

ポスターの説明をする石輪さん

宮入さんによるAMSの詳しい説明

LA-ICPMSの見学

見学に来てくださった皆さんありがとうございました！

新着論文紹介 AGU/EGU 2014/5/5-11

★AGU★

☆G3☆

1. High-resolution ⁴⁰Ar/³⁹Ar dating using a mechanical sample transfer system combined with a high-temperature cell for step heating experiments and a multicollector ARGUS noble gas mass spectrometer

Jörg A. Pfänder, Blanka Sperner, Lothar Ratschbacher, Albrecht Fischer, Martin Meyer, Martin Leistner, Helmut Schaeben

DOI: 10.1002/2014GC005289

☆Paleoceanography☆

2. Deglacial whole-ocean δ¹³C change estimated from 480 benthic foraminiferal records

Carlye D. Peterson, Lorraine E. Lisiecki andJoseph V. Stern

DOI: 10.1002/2013PA002552

3. Sea surface temperature control on the distribution of far-traveled Southern Ocean ice-rafted detritus during the Pliocene

C. P. Cook, D. J. Hill, T. Flierdt, T. Williams, S. R. Hemming, A. M. Dolan, E. L. Pierce, C. Escutia, D. Harwood, G. Cortese, J. J. Gonzales

DOI: 10.1002/2014PA002625

☆JGR-Oceans☆

4. Dynamical mechanisms for asymmetric SSTA patterns associated with some Indian Ocean Dipoles

Shuangwen Sun, Yue Fang, Tana andBaochao Liu

DOI: 10.1002/2013JC009651

5. The contribution of the Weddell Gyre to the lower limb of the global overturning circulation

Loïc Jullion, Alberto C. Naveira Garabato, Sheldon Bacon, Michael P. Meredith, Pete J. Brown, Sinhue Torres-Valdés, Kevin G. Speer, Paul R. Holland, Jun Dong, Dorothée Bakker, Mario Hoppema, Brice Loose, Hugh J. Venables, William J. Jenkins, Marie-José Messias, Eberhard Fahrbach

DOI: 10.1002/2013JC009725

☆GRL☆

6. Climate-driven changes in chemical weathering and associated phosphorus release since 1850: implications for the land carbon balance

Daniel S. Goll, Nils Moosdorf, Jens Hartmann, Victor Brovkin

DOI: 10.1002/2014GL059471

★EGU★

☆Climate of the Past☆

7. Impact of solar versus volcanic activity variations on tropospheric temperatures and precipitation during the Dalton Minimum

J. G. Anet, S. Muthers, E. V. Rozanov, C. C. Raible, A. Stenke, A. I. Shapiro, S. Brönnimann, F. Arfeuille, Y. Brugnara, J. Beer, F. Steinhilber, W. Schmutz, and T. Peter

doi:10.5194/cp-10-921-2014