2014/12/2 New Papers (Elsevier)

♣Earth and Planetary Science Letters♣

1. Refining our estimate of atmospheric CO₂ across the Eocene–Oligocene climatic transition

Ana M.C. Heureux^, , Rosalind E.M. Rickaby

doi:10.1016/j.epsl.2014.10.036

• Diatom-bound organic carbon isotopes used to reconstruct atmospheric CO₂ across Eocene/Oligocene transition.

• Significant drop in CO₂^atm to ∼900 p.p.m.v.∼900 p.p.m.v. prior to the onset of Antarctic glaciation (Oi-1).

• Rebound to pre-Oi-1 CO₂ values (∼1300 p.p.m.v.∼1300p.p.m.v.) following drop.

• Supports hypothesis that a CO₂^atm threshold induces the formation of ice in the Southern hemisphere.

• Solidifies values of CO₂^atm prior to and across major climatic transition.

Keywords:  Eocene–Oligocene transition; Oi-1; carbon isotopes; carbon dioxide; diatom-bound organic matter; Atlantic Southern Ocean

2. Evolution of Mediterranean sea surface temperatures 3.5–1.5 Ma: Regional and hemispheric influences

Timothy D. Herbert^{a, ,} , Gideon Ng^a, Laura Cleaveland Peterson^b

doi:10.1016/j.epsl.2014.10.006

•We present a continuous 2 Myr-long record of Mediterranean sea surface temperatures.

•Temperature spectra show precession dominance before 2.8 Ma and obliquity after.

•Mediterranean hydrology was dominated by precessional forcing throughout.

•Glacial coolings intensified after ∼1.85 Ma∼1.85Ma

•Results support the variability hypothesis for biotic evolution in northern Africa.

Keywords:  Pliocene paleoclimate; Pleistocene paleoclimate; paleotemperatures; Mediterranean sapropels; glacial cycles

♣Global and Planetary Change♣

1. Impact of tropospheric sulphate aerosols on the terrestrial carbon cycle

Alexey V. Eliseev

doi:10.1016/j.gloplacha.2014.11.005

•A parametrisation of the oxidising effect of plant photosynthesising tissues by tropospheric sulphate aerosols (TSA) is developed and implemented into the global Earth system model developed at the A.M. Obukhov Institute of the Atmospheric Physics, Russian Academy of Sciences (IAP RAS CM).

•With this coupled model, the simulations are performed according to the CMIP5 'historical' + 'RCP 8.5' scenario.

•The model response to sulphate aerosol loading is subdivided into the climatic (related to the influence of TSA on the radiative transport in the atmosphere) and ecological (related to the toxic influence of sulphate aerosol on terrestrial plants) impacts.

•The former basically dominates over the latter on the global scale and modifies the responses of the global vegetation and soil carbon stocks to external forcings by 10%. At regional scale, however, ecological impact may be as much important as the climatic one.

Keywords:  tropospheric sulphates; toxic impact; terrestrial ecosystems; climate projections

2. Ocean bottom pressure variability in the Mediterranean Sea and its relationship with sea level from a numerical model

Marta Marcos^,

doi:10.1016/j.gloplacha.2014.11.009

•Rapid (< 2 months) ocean bottom pressure oscillations in the Mediterranean Sea are coherent with sea level and decoupled between western an eastern subbasins.

•Low frequency steric sea level variability is larger in the western than in the eastern subbasin.

•Coastal sea level changes in the Eastern Mediterranean are representative of basin wide ocean mass changes for non-seasonal periods longer than 60 days.

Keywords:  Mediterranean Sea; sea level; ocean bottom pressure

♣Quaternary International♣

1. Test stable carbon isotopic composition of soil organic matters as a proxy indicator of past precipitation: Study of the sand fields in northern China

            Yingyong Chen^a, Huayu Lu^{a, ,} , Enlou Zhang^b, Hongyan Zhang^a, Zhiwei Xu^a, Shuangwen Yi^a, Shuang-Ye Wu^{a, c}

doi:10.1016/j.quaint.2014.10.062

Keywords:  Surface soil organic matter; Stable carbon isotopic composition; Loess/desert transitional zone; Eastern Asian monsoon; Precipitation

2. Reconstruction of surface air temperature in a glaciated region in the western Qilian Mountains, Tibetan Plateau, 1957–2013 and its variation characteristics

            Xiang Qin^{a, ,} , Jizu Chen^a, Shengjie Wang^b, Weijun Sun^c, Wentao Du^a, Yushuo Liu^a

doi:10.1016/j.quaint.2014.10.067

Keywords: Temperature reconstruction; Qilian Mountains; Surface air temperature; Glaciated region

3. Late Holocene flooding history of a tropical river in western India in response to southwest monsoon fluctuations: A multi proxy study from lower Narmada valley

            Alpa Sridhar^{a, ,} , Amzad Laskar^b, , Vandana Prasad^c, , Anupam Sharma^c, , Jayant Tripathi^d, , D. Balaji^a, , D.M. Maurya^a, , L.S. Chamyal^a,

doi:10.1016/j.quaint.2014.10.052

Keywords:  Late Holocene; Lower Narmada valley; Flood events; Sediment influx; Climatic variations

4. Precipitation variability in the Indian Central Himalaya during last ca. 4,000 years inferred from a speleothem record: Impact of Indian Summer Monsoon (ISM) and Westerlies

            Bahadur Singh Kotlia^, , Anoop Kumar Singh, Lalit Mohan Joshi, Bachi Singh Dhaila

doi:10.1016/j.quaint.2014.10.066

Keywords:  Indian Central Himalaya; Stalagmite; Late Holocene; Oxygen and carbon isotopes; Indian Summer Monsoon (ISM); Westerlies

5. Shell morphometric variations in a Patagonian Argentina clam (Ameghinomya antiqua) from the Mid-Pleistocene (MIS 7) to the present

           G.M. Boretto^{a, , ,} , M.C. Baranzelli^b, S. Gordillo^a, I. Consoloni^c, G. Zanchetta^c, G. Morán^a

doi:10.1016/j.quaint.2014.09.033

6. Luminescence based loess chronostratigraphy of the Upper Palaeolithic site Krems-Wachtberg, Austria

            Johanna Lomax^{a, c, ,} , Markus Fuchs^a, , Frank Preusser^b, , Markus Fiebig^c,

doi:10.1016/j.quaint.2012.10.037

7. Our oldest children: Age constraints for the Krems-Wachtberg site obtained from various thermoluminescence dating approaches

            L. Zöller^a, D. Richter^{a, b, , ,} , H. Blanchard^c, T. Einwögerer^d, M. Händel^d, C. Neugebauer-Maresch^d

doi:10.1016/j.quaint.2013.05.003

8. Radiocarbon trends in the Pampean region (Argentina). Biases and demographic patterns during the final Late Pleistocene and Holocene

            Gustavo Martínez^{a, ,} , Luciano Prates^b, , Gustavo Flensborg^a, , Luciana Stoessel^a, , Ana Paula Alcaráz^a, , Pablo Bayala^a,

doi:10.1016/j.quaint.2014.09.056

Keywords:  Pampean region; Final Late Pleistocene and Holocene; Radiocarbon dataset; Demography; Biases

9. Quantitative summer and winter temperature reconstructions from pollen and chironomid data between 15 and 8 ka BP in the Baltic–Belarus area

            Siim Veski^{a, ,} , Heikki Seppä^b, Migle Stančikaitė^c, Valentina Zernitskaya^d, Triin Reitalu^a, Gražyna Gryguc^c, Atko Heinsalu^a, Normunds Stivrins^a, Leeli Amon^a, Jüri Vassiljev^a, Oliver Heiri^e

doi:10.1016/j.quaint.2014.10.059

Keywords:  Palaeoclimate; Pollen; Chironomids; Lateglacial; Baltic; Belarus

10. The impact of paleoclimate, geologic history, and human influence on the evolution of East African cichlids

            Charles K. Twesigye

doi:10.1016/j.quaint.2014.10.065

♣Chemical Geology♣

1. An optimized method for stable isotope analysis of tree rings by extracting cellulose directly from cross-sectional laths

            Akira Kagawa^{a, ,} , Masaki Sano^b, Takeshi Nakatsuka^{b, ,} , Tsutomu Ikeda^c, Satoshi Kubo^c

doi:10.1016/j.chemgeo.2014.11.019

•We improved the complete process of α-cellulose extraction from tree rings for isotope analysis in order to enhance its throughput considerably.

•Our PTFE case enabled extraction of α-cellulose from tree-ring plates as thin as 1 mm.

•Fixing freeze-dried cellulose plates onto sheets made handling of fragile cellulose plates easier.

•The average purity of α-cellulose prepared with our method was 94.5%, which is similar to the standard method.

Keywords:  cellulose extraction; carbon; oxygen; Teflon; holocellulose; lignin

2. Boron isotope geochemistry of vent fluids from arc/back-arc seafloor hydrothermal systems in the western Pacific

            Kyoko Yamaoka^{a, ,} , Ensong Hong^{b, 1}, Tsuyoshi Ishikawa^c, Toshitaka Gamo^b, Hodaka Kawahata^b

doi:10.1016/j.chemgeo.2014.11.009

•Boron content and isotopic composition of hydrothermal vent fluids were measured.

•The boron content and δ¹¹B could be explained by seawater–rock equilibrium.

•Phase separation has little effect on the boron and boron isotope.

•δ¹¹B-Cs/B relationship is useful for estimation of sedimentary contribution.

•This study improved our knowledge on boron behavior during water–rock interaction.

Keywords:  Boron isotope; Hydrothermal system; Water–Rock interaction

♣GPC♣

1. Trends and variability of daily temperature extremes during 1960–2012 in the Yangtze River Basin, China

Yinghui Guan^{a, b,} , Xunchang Zhang^c, Fenli Zheng^{a, b, ,} , Bin Wang^d 

doi:10.1016/j.gloplacha.2014.11.008

•This paper provides the most comprehensive analysis of temperature extremes in YRB.

•Changes of temperature extremes were analyzed in various regions and time periods.

•Increase in DTR was found in all sub-regions and the whole YRB during 1986–2012.

•The YRB showed a general cooling trend before mid-1980s but a warming afterwards.

•Strong relationships between temperature trends and elevation were detected.

Keywords:  Yangtze River Basin; temperature extremes; trends; climate variability; climate indices

2. Parabolic dunes and their transformations under environmental and climatic changes: Toward a conceptual framework for understanding and prediction

 Na Yan^{, ,} , Andreas C.W. Baas

doi:10.1016/j.gloplacha.2014.11.010

•The article presents a global distribution map and inventory of parabolic dunes

•Vegetation-driven dune transformation mechanisms are discussed

•A conceptual framework for understanding different dune transformations is proposed

Keywords:  Dune transformation; parabolic dune; aeolian; climatic change; eco-geomorphic response; vegetation change

♣Palaeogeography, Palaeoclimatology, Palaeoecology♣

1. Austrian MIS 3/2 loess–palaeosol records—Key sites along a west–east transect

 Birgit Terhorst^{a, ,} , Sergey Sedov^b, , Tobias Sprafke^a, Robert Peticzka^c, , Simon Meyer-Heintze^a, Peter Kühn^d, , Elizabeth Solleiro Rebolledo^{a, b}

doi:10.1016/j.palaeo.2014.10.020

•Establishing the MIS 3/2 transition for Austrian loess regions

•Correlation of loess–palaeosol sequences along a W–E transect

•State-of-the-art of palaeosol research from the upper MIS 3 to MIS 2 period

•Relevance of palaeosols for stratigraphic purposes

•Relevance of palaeosols for palaeoclimatic interpretation

Keywords:  MIS 3/MIS 2 transition; Permafrost; Micromorphology; Loess; Palaeosol; Cryosol; Cambisol

2. Reconstruction of a fossil forest reveals details of the palaeoecology, palaeoenvironments and climatic conditions in the late Oligocene of South America

            Mariana Brea^{a, d, ,} , Analía E. Artabe^{b, d,} , Juan R. Franzese^{c, d,} , Alejandro F. Zucol^{a, d,} , Luis A. Spalletti^{c, d,} , Eduardo M. Morel^{b, e,} , Gonzalo D. Veiga^{c, d,} , Daniel G. Ganuza^b,

doi:10.1016/j.palaeo.2014.11.013

•Upper Oligocene Aluminé forest grew under a temperate and humid climate.

•Aluminé forest had a floristic composition similar to the Valdivian forest.

•The forest grew in a volcanic area affected by landslides and eruptions.

•A large catastrophic event like a mass-movement processes buried the forest.

Keywords:  Late Oligocene fossil forest; Three-dimensional reconstruction; Multivariate anatomical analysis; Coexistence approach; Growth rings; Argentina

3. Diatom-based inference of variations in the strength of East Asian spring wind speeds since mid-Holocene

         Yanling Li^{a, ,} , Mengna Liao^{a, b}, Rong Chen^{a, b}, Ji Shen^{a, ,}

doi:10.1016/j.palaeo.2014.11.009

•The sensitivity of diatoms to climate change since mid-Holocene

•A proxy evidence for spring wind speed change

•Diatom responds to the strength of spring wind and solar insolation.

Keywords:  Diatom; East Asian spring wind; Mid-Holocene; Lake Jingpo; Northeast China

4. Challenging the sensitivity limits of Paleomagnetism: Magnetostratigraphy of weakly magnetized Guadalupian–Lopingian (Permian) Limestone from Kyushu, Japan

            Joseph L. Kirschvink^{a, b, ,} , Yukio Isozaki^c, Hideotoshi Shibuya^d, Yo-ichiro Otofuji^e, Timothy D. Raub^f, Isaac A. Hilburn^a, Teruhisa Kasuya^c, Masahiko Yokoyama^e, Magali Bonifacie^g

doi:10.1016/j.palaeo.2014.10.037

•New techniques improve the sensitivity of paleomagnetic measurements by ≥ 100×.

•Late Permian atoll carbonates from Kyushu, Japan preserve magnetostratigraphy.

•The Permian Superchron (Kiaman Reversed Chron) ends by mid-Wordian time.

•The Kamura atoll originated at ~ 12° S latitude, in the Panthalassic Ocean.

Keywords:  Paleomagnetism; Limestone; Permian; Kiaman superchron; Illawarra Reversal; Mass extinction

♣Geochimica et Cosmochimica Acta♣

♣Quaternary Research♣

♣Quaternary Geochronology♣

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