新着論文紹介 This Week’s New Papers (2012/10/30) AGU, EGU, GSA

[AGU]

☆ Geophysical Research Letters☆

2012/10/22-2012/10/28

1. Spatial and glacial-interglacial variations in provenance of the Chinese Loess Plateau

Xiao, G., K. Zong, G. Li, Z. Hu, G. Dupont-Nivet, S. Peng, and K. Zhang

Geophys. Res. Lett., 39, L20715, doi:10.1029/2012GL053304

→ジルコン年代を用いて、レスの起源を推定。氷期と間氷期の起源の違いは、風のパターンと同期していた。

2. The extreme melt across the Greenland ice sheet in 2012

Nghiem, S. V., D. K. Hall, T. L. Mote, M. Tedesco, M. R. Albert, K. Keegan, C. A. Shuman, N. E. DiGirolamo, and G. Neumann

Geophys. Res. Lett., 39, L20502, doi:10.1029/2012GL053611

→衛星から観測された、2012年の大規模なグリーンランド氷床の融解は、現場での観測や気温データと一致していた。このような大規模な融解が起こるのは、1889年以来である。

3. Evaluation of monsoon seasonality and the tropospheric biennial oscillation transitions in the CMIP models

Li, Y., N. C. Jourdain, A. S. Taschetto, C. C. Ummenhofer, K. Ashok, and A. Sen Gupta

Geophys. Res. Lett., 39, L20713, doi:10.1029/2012GL053322

4. Clouds and Snowball Earth deglaciation

Abbot, D. S., A. Voigt, M. Branson, R. T. Pierrehumbert, D. Pollard, G. Le Hir, and D. D. B. Koll

Geophys. Res. Lett., 39, L20711, doi:10.1029/2012GL052861

→スノーボールアースの際の境界条件についてGCMを用いて計算を行い、今まで深刻な問題であったスノーボールアースからの融解には、雲が重要な役割を果たしていることを見いだした。

5. Stability of the Atlantic meridional overturning circulation: A model intercomparison

Weaver, A. J., J. Sedláček, M. Eby, K. Alexander, E. Crespin, T. Fichefet, G. Philippon-Berthier, F. Joos, M. Kawamiya, K. Matsumoto, M. Steinacher, K. Tachiiri, K. Tokos, M. Yoshimori, and K. Zickfeld

Geophys. Res. Lett., 39, L20709, doi:10.1029/2012GL053763

→松本先生やCCSRの吉森さんが共著の論文。21世紀の予測結果は、どの気候モデルでも似たような結果になった。

6. How may low-cloud radiative properties simulated in the current climate influence low-cloud feedbacks under global warming?

Brient, F., and S. Bony

Geophys. Res. Lett., 39, L20807, doi:10.1029/2012GL053265

☆ Paleoceanography☆

2012/10/22-2012/10/28

7. A review of nitrogen isotopic alteration in marine sediments

Robinson, R. S., M. Kienast, A. Luiza Albuquerque, M. Altabet, S. Contreras, R. De Pol Holz, N. Dubois, R. Francois, E. Galbraith, T.-C. Hsu, T. Ivanochko, S. Jaccard, S.-J. Kao, T. Kiefer, S. Kienast, M. F. Lehmann, P. Martinez, M. McCarthy, J. Möbius, T. Pedersen, T. M. Quan, E. Ryabenko, A. Schmittner, R. Schneider, A. Schneider-Mor, M. Shigemitsu, D. Sinclair, C. Somes, A. Studer, R. Thunell, and J.-Y. Yang

Paleoceanography, 27, PA4203, doi:10.1029/2012PA002321

→堆積物の窒素同位体比を測定したところ、初期の埋没で15N/14N比が平均で約2‰増加することがわかった。

☆ Geochemistry, Geophysics, Geosystems☆

☆Journal of Geophysical Resarch C. Oceans☆

2012/10/22-2012/10/28

特に無し

[EGU]

☆Climate of the Past☆

2012/10/22-2012/10/28

Timing and magnitude of equatorial Atlantic surface warming during the last glacial bipolar oscillation

S. Weldeab

Clim. Past, 8, 1705-1716, 2012

doi:10.5194/cp-8-1705-2012

Effects of dating errors on nonparametric trend analyses of speleothem time series

M. Mudelsee, J. Fohlmeister, and D. Scholz

Clim. Past, 8, 1637-1648, 2012

doi:10.5194/cp-8-1637-2012

→ドイツの2つの鍾乳洞から、8.6kaからの記録を持つ3つの石筍を用いて古気候復元を行った。

[GSA]

☆ GSA Bull.☆

Ice-flow switching and East/West Antarctic Ice Sheet roles in glaciation of the western Ross Sea

Sarah L. Greenwood, Richard Gyllencreutz, Martin Jakobsson, and John B. Anderson

Geological Society of America Bulletin, November 2012, v. 124, no. 11-12, p. 1736-1749, doi:10.1130/B30643.1

Early Aptian algal bloom in a neritic proto–North Atlantic setting: Harbinger of global change related to OAE 1a?

Stefan Huck, Ulrich Heimhofer, and Adrian Immenhauser

Geological Society of America Bulletin, November 2012, v. 124, no. 11-12, p. 1810-1825, doi:10.1130/B30587.1

セミナー案内: 2012.10.29 (月)

CESDセミナー
共催：東京大学大気海洋研究所地球表層圏変動センター, PAGES, INQUA commission of Coastal and Marine Processes, JAMSTEC

今回はハワイ大学のAxel Timmerman教授に「地球システムモデルを用いた氷期-間氷期サイクル変動研究」について講演していただく予定です。

日時：2012年10月29日 (Mon) 16:00-17:00
場所：東京大学　大気海洋研究所（アクセス）　@217号室
問い合わせ先：横山祐典（yokoyama AT aori.u-tokyo.ac.jp）

〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜〜
Abstruct
Glacial cycles with timescales of 80-100 thousand years are one of the largest climate signals in the geological record of the Cenozoic. Whereas the role of orbitally-induced solar insolation changes in pace-making glacial cycles, has been recognized since more than hundred years, the detailed physical mechanisms of how insolation variations translate into the waxing and waning of massive inland ice-sheets still remain elusive. This talk will present first results from a newly developed 3-dimensional coupled ice-sheet climate model that is capable of simulating glacial cycles in response to orbital and greenhouse gas forcing. A brief summary of general ice-sheet-climate modeling issues (including mass balance, albedo, initialization, model biases and multiple equilibria) will be followed by an extensive discussion of the mechanisms that lead to the build-up of Northern Hemisphere ice-sheets and their demise. Our results support the notion that changes in boreal summer insolation and greenhouse gases are essential in triggering deglacial ice-sheet retreat in the Northern Hemisphere. The model simulations further illustrate that orbital forcing in austral spring strongly affects the Southern Hemispheric sea-ice extent, which in turn modulates the efficiency of Ekman pumping in the Southern Ocean. This process controls the upwelling of DIC-rich waters, hence contributing to the glacial variability in atmospheric CO₂ concentrations. According to this scenario the dynamics of Northern Hemisphere ice-sheets is then determined by the local orbital forcing as well as by the CO₂  changes -- the latter originating from orbitally-modulated processes in the Southern Hemisphere.

新着論文紹介2012/9/25(遅くなってすみません)

新着論文紹介　This Week’s New Paper (2012/9/25)　Nature, Science, PNAS etc…

・  Nature

Extreme weather

doi:10.1038/489335b

Afternoon rain more likely over drier soils

Christopher M. Taylor, Richard A. M. de Jeu, Françoise Guichard, Phil P. Harris & Wouter A. Dorigo

doi:10.1038/nature11377

世界中の土壌中の湿度と降水の関係性を調べた研究。主に土壌には午後の降水量が反映されやすい？

土壌中の湿度と降水量の間にフィードバックは見られなかった。

・  PNAS

< Earth, Atmospheric, and Planetary Sciences >

Biodiversity tracks temperature over time

Peter J. Mayhew, Mark A. Bell, Timothy G. Benton, Alistair J. McGowan

doi:10.1073/pnas.1200844109

先行研究において言われていた生物多様性と気温との逆相関は、海洋底の無脊椎動物の実際のサンプリングでは見られず、逆に正相関が見られた。

・  Science

・  Geology

・  Nature Geoscience

特になし

新着論文紹介 This Week’s New Papers (2012/10/16) ELSEVIER

☆ Earth and Planetary Science Letters☆

Volumes 353–354, Pages 1-270 (1 November 2012)

1. The Blake geomagnetic excursion recorded in a radiometrically dated speleothem

María-Luisa Osete, Javier Martín-Chivelet, Carlos Rossi, R. Lawrence Edwards, Ramon Egli, M. Belén Muñoz-García, Xianfeng Wang, F. Javier Pavón-Carrasco, Friedrich Heller

DOI:10.1016/j.epsl.2012.07.041

☆ Geochimica et Cosmochimica Acta☆

Volume 96, Pages 1-352 (1 November 2012)

2. Isotope disequilibrium effects: The influence of evaporation and ventilation effects on the carbon and oxygen isotope composition of speleothems – A model approach

Michael Deininger, Jens Fohlmeister, Denis Scholz, Augusto Mangini

DOI:10.1016/j.gca.2012.08.013

3. Diatom silicon isotopes as a proxy for silicic acid utilisation: A Southern Ocean core top calibration

Katherine E. Egan, Rosalind E.M. Rickaby, Melanie J. Leng, Katharine R. Hendry, Michaël Hermoso, Hilary J. Sloane, Helen Bostock, Alex N. Halliday

DOI:10.1016/j.gca.2012.08.002

4. Revised calibration of the MBT–CBT paleotemperature proxy based on branched tetraether membrane lipids in surface soils

Francien Peterse, Jaap van der Meer, Stefan Schouten, Johan W.H. Weijers, Noah Fierer, Robert B. Jackson, Jung-Hyun Kim, Jaap S. Sinninghe Damsté

DOI:10.1016/j.gca.2012.08.011

5. The sources and sinks of CO2 in caves under mixed woodland and grassland vegetation

Daniel O. Breecker, Ashley E. Payne, Jay Quade, Jay L. Banner, Carolyn E. Ball, Kyle W. Meyer, Brian D. Cowan

DOI:10.1016/j.gca.2012.08.023

6. Influence of porewater advection on denitrification in carbonate sands: Evidence from repacked sediment column experiments

Isaac R. Santos, Bradley D. Eyre, Ronnie N. Glud

DOI:10.1016/j.gca.2012.08.018

☆ Global and Planetary Change☆

Volumes 98–99, Pages 1-166 (December 2012)

7. Lower bounds to future sea-level rise

Antonio Zecca, Luca Chiari

DOI:10.1016/j.gloplacha.2012.08.002

8. An investigation of Glacial Isostatic Adjustment over the Amundsen Sea sector, West Antarctica

A. Groh, H. Ewert, M. Scheinert, M. Fritsche, A. Rülke, A. Richter, R. Rosenau, R. Dietrich

DOI:10.1016/j.gloplacha.2012.08.001

9. Changes in atmospheric circulation patterns associated with high and low rainfall regimes in the Hawaiian Islands region on multiple time scales

Henry F. Diaz, Thomas W. Giambelluca

DOI:10.1016/j.gloplacha.2012.08.011

10. Variation of the winter monsoon in South China Sea over the past 183 years: Evidence from oxygen isotopes in coral

Shaohua Song, Zicheng Peng, Weijian Zhou, Weiguo Liu, Yi Liu, Tegu Chen

DOI:10.1016/j.gloplacha.2012.08.013

☆ Quaternary International☆

Volume 278, Pages 1-86 (8 November 2012)

Taphonomic approaches in archaeology: current topics and methods from Southern South America

Edited by Agustina Massigoge and Mariela E. González

☆ Quaternary Science Reviews☆

Volume 53, Pages 1-122 (15 October 2012)

11. Late Quaternary grounded ice extent in the Filchner Trough, Weddell Sea, Antarctica: new marine geophysical evidence

Robert D. Larter, Alastair G.C. Graham, Claus-Dieter Hillenbrand, James A. Smith, Jennifer A. Gales

DOI:10.1016/j.quascirev.2012.08.006

☆ Quaternary Science Reviews☆

Volume 54, Pages 1-152 (26 October 2012)

Coastal Change during the Late Quaternary

Edited by Craig R. Sloss, Adam D. Switzer, Benjamin P. Horton and Yongqiang Zong

12. Sea-level rise and coastal change: the past as a guide to the future

Colin D. Woodroffe, Colin V. Murray-Wallace

DOI:10.1016/j.quascirev.2012.05.009

新着論文 Nature, Science & PNAS

New Papers & Articles Published from 10/07/2012 to 10/14/2012
Nature (News & Views) Volume 490 (10/11/2012)
(1) When an oceanic tectonic plate cracks
doi:10.1038/490183a
The recent two earthquakes in Indonesia occurred in the interior of oceanic plates rather than a plate boundary. Theses exceptional earthquakes raised questions to classic seismology .
Nature (Letter)
(2) April 2012 intra-oceanic seismicity off Sumatra boosted by the Banda-Aceh megathrust M. Delesclause et al
doi:10.1038/nature11520
The earthquakes in Indonesia in 2012 seemed to be a continuation of the earthquakes in 2004 and 2005 that caused the plate deformation between India and Australia.
(3) En échelon and orthogonal fault ruptures of the 11 April 2012 great intraplate earthquakes
H. Yue, T. Lay, & K. Koper
doi:10.1038/nature11492
The seismic wave analysis revealed that there were four-fault ruptures lasting about 160 seconds.
(4) The 11 April 2012 east Indian Ocean earthquake triggered large aftershocks
worldwide
F. F. Pollitz, R. S. Stein, V. Sevilgen & R. Burgmann
doi:10.1038/nature11504
The global aftershocks after the 2012 east Indian Ocean earthquake were located along the four lobes of Love-wave radiation.
Science (News & Analysis) Volume 338 (10/13/2012)
(5) New arctic research vessel ready to make a splash
doi: 10.1126/science.338.6104.183
Good news for polar researchers! NSF has a new research ship for Bering Sea research. Science (Perspectives)
(6) A golden spike for planetary science
doi: 10.1126/science.1228328
The comments about Dawn mission: exploring Vesta, the second most massive asteroid in the solar system, tell us the evolution of planets and distribution of water. In situ measurements confirmed previous logical interpretation.
(7) Downsizing the deep biosphere
doi: 10.1126/science.1229296
Regarding the argument about microbial biomass beneath the ocean floor. 1 or 10 to 30%? There are so many factors that need to be investigated for a better estimation (e.g. temp., space and energy availability etc).
(8) Seeing is believing
doi: 10.1126/science.1228953
The central Andes sits on the largest active magma body, and the magma is rising underneath.
(9) An ancient core dynamo in asteroid Vesta
R. R. Fu et al
doi: 10.1126/science.1225648
The comparison between Vesta and a meteorite discovered in Antarctica in 1981 has revealed that Vesta formed a liquid metallic core.
(10) Elemental mapping by Dawn reveals exogenic H in Vesta’s regolith
T. H. Prettyman et al.
doi: 10.1126/science.1225354
Vesta was elementally mapped, and it revealed that the high concentration of hydrogen around the equator is caused by accumulations of chondrites.
(11) Pitted Terrain on Vesta and implications for the presence of volatiles
B. W. Denvei et al.
doi: 10.1126/science.1225374
Pitted terrain on Vesta seems to be formed from the degassing of volatile bearing materials.
PNAS Volume 109 (10/09/2012)
No papers related to earth science.

新着論文紹介 (AGU) 20121016

8 Oct 2012 – 14 Oct 2012

Geophysical Research Letters

1, In situ water vapor and ozone measurements in Lhasa and Kunming during the Asian summer monsoon

Bian, J., L. L. Pan, L. Paulik, H. Vömel, H. Chen, and D. Lu

Geophys. Res. Lett., 39, L19808, doi:10.1029/2012GL052996

→water vapor, ozone, in situ measurement, sodes, Asian Monsoon

2, Observed interannual variability of the Atlantic meridional overturning circulation at 26.5°N

McCarthy, G., E. Frajka-Williams, W. E. Johns, M. O. Baringer, C. S. Meinen, H. L. Bryden, D. Rayner, A. Duchez, C. Roberts, and S. A. Cunningham

Geophys. Res. Lett., 39, L19609, doi:10.1029/2012GL052933

→AMOC, RAPID-WATCH/MOCHA/WBTS array

3, Monsoonal influence on Southern Hemisphere 14CO2

Hua, Q., M. Barbetti, V. A. Levchenko, R. D. D'Arrigo, B. M. Buckley, and A. M. Smith

Geophys. Res. Lett., 39, L19806, doi:10.1029/2012GL052971

⇒teak tree, Sulawesi, Southern Hemisphere 14C, winter Asian Monsoon, ITCZ

4, Remote influences on freshwater flux variability in the Atlantic warm pool region

Zhang, L., and C. Wang

Geophys. Res. Lett., 39, L19714, doi:10.1029/2012GL053530

→Atlantic Warm Pool, freshwater flux, SST gradient

5, Ocean circulation beneath Larsen C Ice Shelf, Antarctica from in situ observations

Nicholls, K. W., K. Makinson, and E. J. Venables

Geophys. Res. Lett., 39, L19608, doi:10.1029/2012GL053187

→Larsen C Ice Shelf, CTD profiles, basal melting

Geochemistry,Geophysics,Geosystems

6, Tracing the Paleo sulfate-methane transition zones and H2S seepage events in marine sediments: An application of C-S-Mo systematics

Peketi, A., A. Mazumdar (corresponding author), R. K. Joshi, D. J. Patil, P. L. Srinivas, and A. M. Dayal

Geochem. Geophys. Geosyst., 13, Q10007, doi:10.1029/2012GC004288

→the sulfate methane transition zone (SMTZ), Microbially mediated anaebic oxidation of methane (AOM), sediement core, Bay of Bengal

Journal of Geophysical Research . Oceans

7, Simulating the 1998 spring bloom in Lake Michigan using a coupled physical-biological model

Luo, L., J. Wang, D. J. Schwab, H. Vanderploeg, G. Leshkevich, X. Bai, H. Hu, and D. Wang

J. Geophys. Res., 117, C10011, doi:10.1029/2012JC008216

→A coupled physical-biological model, Lake Michigan, Spring bloom

Paleoceanography

8, Sea surface temperature variability in the Pacific sector of the Southern Ocean over the past 700 kyr

Ho, S. L., G. Mollenhauer, F. Lamy, A. Martínez-Garcia, M. Mohtadi, R. Gersonde, D. Hebbeln, S. Nunez-Ricardo, A. Rosell-Melé, and R. Tiedemann

Paleoceanography, 27, PA4202, doi:10.1029/2012PA002317

→Southern Ocean, Alkenone based Pleistocene SST, ACC

9, Deciphering the role of southern gateways and carbon dioxide on the onset of the Antarctic Circumpolar Current

Lefebvre, V., Y. Donnadieu, P. Sepulchre, D. Swingedouw, and Z.-S. Zhang

Paleoceanography, 27, PA4201, doi:10.1029/2012PA002345

→ACC, carbon dioxide, Eocene/Oligocene

Global Biogeochemical Cycles

10, Role of diatoms in nickel biogeochemistry in the ocean

Twining, B. S., S. B. Baines, S. Vogt, and D. M. Nelson

Global Biogeochem. Cycles, 26, GB4001, doi:10.1029/2011GB004233

→nickel, diatom, synchrotron x-ray fluorescence (SXRF) analysis

Climate of the Past

11, Modelling large-scale ice-sheet–climate interactions following glacial inception

J. M. Gregory, O. J. H. Browne, A. J. Payne, J. K. Ridley, and I. C. Rutt

Clim. Past, 8, 1565-1580, 2012

→Coupled AOGCM-ice-sheet model, Laurentide, Fenoscandia

12, Constraining the temperature history of the past millennium using early instrumental observations

P. Brohan, R. Allan, E. Freeman, D. Wheeler, C. Wilkinson, and F. Williamson

Clim. Past, 8, 1551-1563, 2012

→past millennium, instrumental data, ship measurement

13, Isotopic and lithologic variations of one precisely-dated stalagmite across the Medieval/LIA period from Heilong Cave, central China

Y. F. Cui, Y. J. Wang, H. Cheng, K. Zhao, and X. G. Kong

Clim. Past, 8, 1541-1550, 2012

→Heliong Cave, stalagmite, U/Th dating, oxygen and carbon isotopes, Sr, MWP/LIA, ITCZ, Summer monsoon

14, Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding the "8.2 ka event"

J. Y. Wu, Y. J. Wang, H. Cheng, X. G. Kong, and D. B. Liu

→8.2ka event, stalagmites, Nuanhe Cave, Oxygen isotopes, Ba/Ca, Asian Monsoon

15, Planetary fertility during the past 400 ka based on the triple isotope composition of O2 in trapped gases from the Vostok ice core

T. Blunier, M. L. Bender, B. Barnett, and J. C. von Fischer

→Vostok Ice Core, Oxygen isotopes, box model, terrestrial oxygen productivity

担当；川久保