研究室BBQ（春の陣）

アップが遅くなりました。。。

今回の春の陣のBBQリーダー：D1の坂下です。

4月30日に恒例のBBQ（春の陣）が横山先生宅で開催されました。
総勢20名以上の大規模なものになりました！！

以下写真

BBQの前には10人くらいでビール工場見学にいきました。

また行きたいな〜

BBQ全体の様子。どんどん規模が大きくなっています！

スティーブ夫妻による特製チキン！おいしかったです！！

池田さんによる本の読み聞かせタイム。BBQの恒例になりそうです。

新着論文紹介 2012/5/15 (ELSEVIER)

2012/5/15　新着論文紹介（ELSEVIER）

Marine Geology Volumes 303–306, 

1. Carbonate saturation dynamics during the Paleocene–Eocene thermal maximum: Bathyal constraints from ODP sites 689 and 690 in the Weddell Sea (South Atlantic)

Kelly, D. C., T. Nielsen, M.J., and S. Schellenberg, A. (2012) Marine Geology 303–306:75-86.

doi: 10.1016/j.margeo.2012.02.003. Full Article

(~ 55.5 Ma) global warming event known as the Paleocene–Eocene thermal maximum (PETM)

gradual lysocline deepening as negative feedback mechanisms neutralized ocean acidification

2. Transgressive deposits along the actively deforming Eel River Margin, Northern California

Hogarth, L., J., N. Driscoll, W., J. Babcock, M., and D. Orange, L. (2012) Marine Geology 303–306:99-114.

doi: 10.1016/j.margeo.2012.02.005. Full Article

eismic data acquired along California

sea-level rise was the main control on sediment sequence

3. Geophysical evidence of a late Pleistocene glaciation and paleo-ice stream on the Atlantic Continental Shelf offshore Massachusetts, USA

Siegel, J., B. Dugan, D. Lizarralde, M. Person, W. DeFoor, and N. Miller (2012) Marine Geology 303–306:63-74.

doi: 10.1016/j.margeo.2012.01.007. Full Article

seismic data collected offshore Massachusetts, USA

evidence of a pre-Wisconsinan glaciation that extended beyond the limits of the Last Glacial Maximum (LGM) in the region

新着論文（2012.5.8）AGU, EGU, GSA

☆AGU★ (30 April – 6 May 2012)

○G3

High resolution optically stimulated luminescence dating of a sediment core from the southwestern Sea of Okhotsk

Sugisaki, S., J. P. Buylaert, A. S. Murray, N. Harada, K. Kimoto, Y. Okazaki, T. Sakamoto, K. Iijima, S. Tsukamoto, H. Miura, and Y. Nogi

doi:10.1029/2011GC004029

IODP@オホーツク海のコアの石英OSL年代決定の結果について。14C年代と概ね整合的で、深海掘削コアにもOSL年代決定法は使えそうらしい。

○GRL

Recent weakening of northern East Asian summer monsoon: A possible response to global warming

Zhu, C., B. Wang, W. Qian, and B. Zhang

doi:10.1029/2012GL051155

東アジアの夏モンスーンをシミュレーション。近年のGHGの増加がバイカル湖周辺の気温を上昇させ、特に1970年以降の東アジアモンスーンの弱化を招いている？また、GHGのforcingなしでは温暖化のトレンドは見られないらしい。

Late Miocene upward and outward growth of eastern Tibet and decreasing monsoon rainfall over the northwestern Indian subcontinent since ∼10 Ma

Molnar, P., and B. Rajagopalan

doi:10.1029/2012GL051305

インド亜大陸の衝突とそれに伴うチベット高原東部の隆起によって北西インドの気候が乾燥化した？

Climate models produce skillful predictions of Indian summer monsoon rainfall

DelSole, T., and J. Shukla

doi:10.1029/2012GL051279

AOGCMでインドモンスーンの降水をうまく再現できた。カギになったのは徐々に上昇する海水温の扱いらしい。

The role of summer surface wind anomalies in the summer Arctic sea ice extent in 2010 and 2011

Ogi, M., and J. M. Wallace

doi:10.1029/2012GL051330

2007年夏には北極海における過去最低の海氷の量が観測されたが、原因は夏の高気圧性の風の強化らしい。

Greenland ice core evidence for spatial and temporal variability of the Atlantic Multidecadal Oscillation

Chylek, P., C. Folland, L. Frankcombe, H. Dijkstra, G. Lesins, and M. Dubey

doi:10.1029/2012GL051241

グリーンランドとカナダのアイスコアの660年分のd18O記録を周期解析したところ、AMOの周期と同じ周期（〜20年）が確認された。例外的にLIAとMWPにはそれぞれ20年、43年（11.5年も？）の周期が確認されたとのこと。 

A 21st century shift in the relationship between ENSO SST and warm water volume anomalies

McPhaden, M. J.

doi:10.1029/2012GL051826

1980年から2010年にかけての赤道太平洋のSSTと表層水の熱容量（暖水域の体積）との間の関係が、21世紀に入ってから変化しているらしい。赤道太平洋中部のENSOの強化が原因？

○JGR-Oceans

Seasonal coupling and de-coupling of net calcification rates from coral reef metabolism and carbonate chemistry at Ningaloo Reef, Western Australia

Falter, J. L., R. J. Lowe, M. J. Atkinson, and P. Cuet

doi:10.1029/2011JC007268

北西オーストラリアのNingaroo Reefにおいて総生産速度、石灰化、栄養塩の摂取を測定。季節間の水温変動が１℃と小さく、総生産速度、石灰化、栄養塩はそれほど顕著には変化しない。日周期では光量というよりはむしろpH（アラゴナイトの不飽和度）と栄養塩が石灰化を律速している。

Antarctic icebergs distributions, 2002–2010

Tournadre, J., F. Girard-Ardhuin, and B. Legrésy

doi:10.1029/2011JC007441

これまで観測の対象とされていなかった、南極周辺の小規模（100-2800m）の氷山を高解像度の高度計で人工衛星から観測（2002-2010年）。かなりの量の淡水が南大洋に供給されている模様。巨大氷山とともに流出するものもあれば、小規模の氷山のみが流出する地域もあり、地域的・時間的な変動が大きい。

Impact of tide-topography interactions on basal melting of Larsen C Ice Shelf, Antarctica

Mueller, R. D., L. Padman, M. S. Dinniman, S. Y. Erofeeva, H. A. Fricker, and M. A. King

doi:10.1029/2011JC007263

西南極のLarsen C棚氷の力学（氷の厚さ、潮汐、基部の融解速度など）を3Dモデルで再現。様々なforcingが関与。

Eddy contributions to the meridional transport of salt in the North Atlantic

Treguier, A. M., J. Deshayes, C. Lique, R. Dussin, and J. M. Molines

doi:10.1029/2012JC007927

大西洋における塩分の変動をモデリング。

○Paleoceanography

今回はなし

☆EGU★ (30 April – 6 May 2012)

○Climate of the Past

Precipitation variability in the winter rainfall zone of South Africa during the last 1400 yr linked to the austral westerlies

J. C. Stager, P. A. Mayewski, J. White, B. M. Chase, F. H. Neumann, M. E. Meadows, C. D. King, and D. A. Dixon

温暖化した世界では偏西風が極側に移動することが予測されているが、南半球の古気候記録はニュージーランドや南米などに限定されており、評価の妨げとなっている。堆積物中の珪藻の変化から過去1400年間の南アフリカの降水量を復元。湿潤期は偏西風が赤道側に移動した時期に対応し、フンボルト海流の変化を通して南極周辺の子午面循環に影響したと考えられる。しかしながら、ニュージーランドや南米の記録との食い違いも明らかに見られ、南半球全体の記録としてみなすには難しい。

☆GSA★

○ GSA Bulletin

Vol. 124, No. 5-6 (1 May 2012)

Rapid and widespread response of the Lower Mississippi River to eustatic forcing during the last glacial-interglacial cycle

Zhixiong Shen, Torbjörn E. Törnqvist, Whitney J. Autin, Zenon Richard P. Mateo, Kyle M. Straub, and Barbara Mauz

氷期間氷期スケールでのミシシッピデルタの堆積相の変化について。27のOSL年代決定より。

Late Quaternary weathering, erosion, and deposition in Nahal Yael, Israel: An "impact of climatic change on an arid watershed"?

Yehouda Enzel, Rivka Amit, Tamir Grodek, Avner Ayalon, Judith Lekach, Naomi Porat, Paul Bierman, Joel D. Blum, and Yigal Erel

イスラエルの河川堆積物コアの再解釈。

昼間のフリスビー

今日は横山研の初めてのランチタイムの運動でした。昼食後に横山先生、オブラクタ、中村、石輪は、柏の葉公園の「桜広場」でフリスビーをやってきました。フリスビーはアメリカで誕生した不思議なスポーツの一つです。

やっぱり、ちょっと難しいね。

201200508新着論文(ELSEVIER)

Quaternary Science Reviews

Volume 41,  Pages 1-146, 18 May 2012

1, Deglacial changes of the southern margin of the southern westerly winds revealed by terrestrial records from SW Patagonia (52°S)

P.I. Moreno, R. Villa-Martínez, M.L. Cárdenas, E.A. Sagredo

→Southwest Patagonia, Southern Westerly Winds, Last glacial termination, Atmospheric CO2 variations

2, A last millennium temperature reconstruction using chironomids preserved in sediments of anoxic Seebergsee (Switzerland): consensus at local, regional and Central European scales

I. Larocque-Tobler, M.M. Stewart, R. Quinlan, M. Trachsel, C. Kamenik, M. Grosjean

→Climate change, Last millennium, Lake sediments, Chironomids

3, High resolution Lateglacial and early-Holocene summer air temperature records from Scotland inferred from chironomid assemblages

Stephen J. Brooks, Ian P. Matthews, Hilary H. Birks, H.John B. Birks

→Lake sediments, Tephra chronology, Tephra age-depth model, Climate change, Chironomid-inferred temperatures

4, Timing and structure of the Younger Dryas event in northern China

Zhi-Bang Ma, Hai Cheng, Ming Tan, R. Lawrence Edwards, Hong-Chun Li, Chen-Feng You, Wu-Hui Duan, Xu Wang, Megan J. Kelly

→Asymmetrical Younger Dryas structure, Abrupt climate change, Asian monsoon, Kulishu Cave, Northern China

5, Aquatic ecosystem responses to Holocene climate change and biome development in boreal, central Asia

Anson W. Mackay, Elena V. Bezrukova, Melanie J. Leng, Miriam Meaney, Ana Nunes, Natalia Piotrowska, Angela Self, Alexander Shchetnikov, Ewan Shilland, Pavel Tarasov, Luo Wang, Dustin White

→Eastern Sayan mountains, Lake ontogeny, Pollen

Biome, Chironomid, Diatom ,Organic isotope ,Multiproxy, Redundancy analysis

6, Lateglacial surface exposure dating in the Monadhliath Mountains, Central Highlands, Scotland

D.M. Gheorghiu, D. Fabel, J.D. Hansom, S. Xu

→Glacial geomorphology, Cosmogenic nuclide exposure ages, Plateau ice, Monadhliath Mountains ,Scotland

Quaternary Research

Volume 77, Issue 3,  Pages 335-500, May 2012

7, Weakening climatic signal since mid-20th century in European larch tree-ring chronologies at different altitudes from the Adamello-Presanella Massif (Italian Alps)

Anna Coppola, Giovanni Leonelli, Maria Cristina Salvatore, Manuela Pelfini, Carlo Baroni

→Tree-rings, Climate change, European Alps

8, Temperatures of the past 2000 years inferred from lake sediments, southwest Yukon Territory, Canada

Joan Bunbury, Konrad Gajewski

→Chironomids、Ostracodes, Lake sediments, Quantitative paleoclimate reconstructions, Yukon Territory, Late Holocene, Little Ice Age, Medieval Climate Anomaly

9, Holocene palaeohydrological changes in the northern Mediterranean borderlands as reflected by the lake-level record of Lake Ledro, northeastern Italy

Michel Magny, Sébastien Joannin, Didier Galop, Boris Vannière, Jean Nicolas Haas, Michele Bassetti, Paolo Bellintani, Romana Scandolari, Marc Desmet

→Lake-level fluctuations, Lacustrine sediments, Palaeohydrology, Holocene

10, Organic stable carbon isotopic composition reveals late Quaternary vegetation changes in the dune fields of northern China

Huayu Lu, Yali Zhou, Weiguo Liu, Joseph Mason

→Dune fields, Stable carbon isotopes, C4 plants, Vegetation changes, Climatic change, Northern China, Late Quaternary

11, Synchronous climatic change inferred from diatom records in four western Montana lakes in the U.S. Rocky Mountains

Brandi Bracht-Flyr, Sherilyn C. Fritz

→Diatom, Lake-level, Paleoclimate, Holocene, western North America, Little Ice Age, Medieval Climate Anomaly

Palaeogeography,Palaeoclimatology,

Palaeoecology

Volumes 333–334,  Pages 1-228, 15 May 2012

12, The meridional temperature gradient in the eastern North Atlantic during MIS 11 and its link to the ocean–atmosphere system

Evgenia S. Kandiano, Henning A. Bauch, Kirsten Fahl, Jan P. Helmke, Ursula Röhl, Marta Pérez-Folgado, Isabel Cacho

→Eastern North Atlantic, Stage 11, North Atlantic Oscillation, Foraminiferal sea surface temperatures, Alkenone sea surface temperatures

13, Benthic foraminiferal assemblage turnover during intensification of the Northern Hemisphere glaciation in the Piacenzian Punta Piccola section (Southern Italy)

Franca Sgarrella, Valentino Di Donato, Rodolfo Sprovieri

→Benthic foraminifera, Palaeoecology ,Sapropelites, Piacenzian

14, The annual particle cycle in Lake Van (Turkey)

Mona Stockhecke, Flavio S. Anselmetti, Aysegül F. Meydan, Daniel Odermatt, Michael Sturm

→Sequential sediment traps, Satellite data, Seasonal particle fluxes, Annually laminated sediment, Lake Van, Sedimentary archive

15, High-resolution chemostratigraphic records from Lower Pliensbachian belemnites: Palaeoclimatic perturbations, organic facies and water mass exchange (Asturian basin, northern Spain)

Maider Armendáriz, Idoia Rosales, Beatriz Bádenas, Marc Aurell, José Carlos García-Ramos, Laura Piñuela

→Belemnites, Stable isotopes ,Strontium isotopes, Mg/Ca ratios, Lower Jurassic

Chemical Geology

Volumes 308–309,  Pages 1-74, 20 May 2012

16, The influence of near-surface winds on the Sr isotope composition of aeolian sediments: a wind tunnel experiment

Xunming Wang, Lili Lang, Caixia Zhang, Ting Hua, Hongtao Wang

→Strontium isotopes, Dust source area, Near-surface wind, Arid China

17, Diagenetic evaluation of a Pennsylvanian carbonate succession (Bird Spring Formation, Arrow Canyon, Nevada, U.S.A.) — 1: Brachiopod and whole rock comparison

Uwe Brand, Ganqing Jiang, Karem Azmy, James Bishop, Isabel P. Montañez

→Pennsylvanian, Bird Spring Formation, Diagenetic evaluation, Brachiopods whole rock, Trace chemistry, Carbon oxygen and strontium isotopes

18, Are pooled tree ring δ13C and δ18O series reliable climate archives? — A case study of Pinus nigra spp. laricio (Corsica/France)

S. Szymczak, M.M. Joachimski, A. Bräuning, T. Hetzer, J. Kuhlemann

→Tree rings, Carbon isotopes, Oxygen isotopes, Pooling, Age trend

Pinus nigra ssp. laricio

Quaternary International

Volume 261,  Pages 1-182, 30 May 2012

IGCP 521: Caspian-Black Sea –Mediterranean Corridors during the last 30 ka: sea level change and human adaptive strategies Selected Papers

Edited by Valentina Yanko-Hombach, Nicolae Panin, Mariana Filipova-Marinova and Norm Catto

Geochimica et Cosmochimica Acta

Volume 86,  Pages 1-410, 1 June 2012

19, Cosmogenic 36Cl in karst waters from Bunker Cave North Western Germany – A tool to derive local evapotranspiration?

C. Münsterer, J. Fohlmeister, M. Christl, A. Schröder-Ritzrau, V. Alfimov, S. Ivy-Ochs, A. Wackerbarth, A. Mangini

→rain and drip waters, Bunker Cave, 36Cl, AMS, evapotranspiration

20, Identifying and quantifying natural CO2 sequestration processes over geological timescales: The Jackson Dome CO2 Deposit, USA

Zheng Zhou, Chris J. Ballentine, Martin Schoell, Scott H. Stevens

→CO2, noble gas, CO2 sequestration, Late Cretaceous, Jackson Dome, ground water

21, Assessing amino acid racemization variability in coral intra-crystalline protein for geochronological applications

Erica J. Hendy, Peter J. Tomiak, Matthew J. Collins, John Hellstrom, Alexander W. Tudhope, Janice M. Lough, Kirsty E.H. Penkman

→amino acid racemization, chronology, coral, Intra-crystalline protein