New Papers (AGU, EGU, GSA) 2017/10/31~11/6

Geophysical Research Letters
1.    The impact of the AMOC resumption in the western South Atlantic thermocline at the onset of the Last Interglacial
Thiago P. Santos, Douglas O. Lessa, Igor M. Venancio, Cristiano M. Chiessi, Stefan Mulitza, Henning Kuhnert, Ana Luiza S. Albuquerque
Glacial terminations are periods of fast ice-sheet desintegration, elevetion of global temperatures and release of carbon dioxide from the deep ocean to the atmosphere. These conditions turn such intervals well situated to the study of global climate changes. The warming of high latitudes is supported by the transfer of heat and salt from low latitudes. However, the documentation of how glacial terminations occurred in low latitude oceans are still poorly documented. In this study, we show through oxygen isotopes of planctonic foraminifera that thermocline waters from the Brazilian margin may have work as a source of hidrostatic instability to return the meridional circulation to its interglacial mode. The impact of this process may have produced a colder South Atlantic thermocline during the transition to the Last Interglacial (130 kyr ago).

2.    The signature of Southern Hemisphere atmospheric circulation patterns in Antarctic precipitation
Gareth J. Marshall, David W. J. Thompson, Michiel R. van den Broeke

3.    Whole-ocean changes in silica and Ge/Si ratios during the last deglacial deduced from long-lived giant glass sponges
K. P. Jochum, J. A. Schuessler, X.-H. Wang, B. Stoll, U. Weis, W. E. G. Müller, G. H. Haug, M. O. Andreae, P. N. Froelich

JGR: Earth Surface
4.    Assimilating the ICE-6G_C reconstruction of the latest Quaternary ice-age cycle into numerical simulations of the Laurentide and Fennoscandian ice-sheets
G. R. Stuhne, W. R. Peltier

Journal of Quaternary Science
5.    Development, evolution and drainage of glacial Lake Naskaupi during the deglaciation of north-central Quebec and Labrador
6.    Synchronized proxy-based temperature reconstructions reveal mid- to late Holocene climate oscillations in High Arctic Svalbard
Tomi P. Luoto, Antti E. K. Ojala, Laura Arppe, Stephen J. Brooks, Eija Kurki, Mimmi Oksman, Matthew J. Wooller, Marek Zajączkowski

7.    Re-evaluation of MIS 3 glaciation using cosmogenic radionuclide and single grain luminescence ages, Kanas Valley, Chinese Altai
Natacha Gribenski, Krister N. Jansson, Frank Preusser, Jonathan M. Harbor, Arjen P. Stroeven, Mareike Trauerstein, Robin Blomdin, Jakob Heyman, Marc W. Caffee, Nathaniel A. Lifton, Wei Zhang

8.    Mid-Holocene Iberian hydroclimate variability and paleoenvironmental change: molecular and isotopic insights from Praia Rei Cortiço, Portugal
Audrey K. Taylor, Michael M. Benedetti, Jonathan A. Haws, Chad S. Lane

9.    The role of African dust in Atlantic climate during Heinrich events
L. N. Murphy, M. Goes, A. C. Clement

10. The Northern Gulf of Mexico During OAE2 and the Relationship Between Water Depth and Black Shale Development
Christopher M. Lowery, Robert Cunningham, Craig D. Barrie, Timothy Bralower, John W. Snedden

Journal of Climate
11. ENSO effects on annual variations of summer precipitation stable isotopes in Lhasa, southern Tibetan Plateau
Jing Gao, You He, Valerie Masson-Delmotte, and Tandong Yao

Climate of the past
12. The sensitivity of the Greenland ice sheet to glacial-interglacial oceanic forcing
Ilaria Tabone, Javier Blasco, Alexander Robinson, Jorge Alvarez-Solas, and Marisa Montoya

13.  Modelling tree ring cellulose δ18O variations in two temperature-sensitive tree species from North and South America
Aliénor Lavergne, Fabio Gennaretti, Camille Risi, Valérie Daux, Etienne Boucher, Martine M. Savard, Maud Naulier, Ricardo Villalba, Christian Bégin, and Joël Guiot
Tree rings are long-term recorders of past climate variations, but the origin of the climate signals imprinted is difficult to interpret. Here, using a complex model we show that the temperature signal recorded in tree rings from two species from North and South America is likely related to processes occurring at the leaf level. This result contributes to the quantitative interpretation of these proxies for their future exploitation for millennium-scale climate reconstructions.

14.  Long-term response of oceanic carbon uptake to global warming via physical and biological pumps
Akitomo Yamamoto, Ayako Abe-Ouchi, and Yasuhiro Yamanaka
Millennial-scale decreases in oceanic CO2 uptake due to global warming projected by our GCM and offline biogeochemical model are consistent with previous long time simulations with EMIC. Sensitivity studies show that decreases in oceanic CO2 uptake are mainly caused by a weaker biological pump and seawater warming. Enhanced CO2 uptake due to weaker equatorial upwelling cancels reduced CO2 uptake due to weaker AMOC and AABW formation. Thus circulation change becomes a second-order process.

Geochemistry, Geophysics, Geosystems
JGR: Oceans
Global Biogeochemical Cycles
GSA Bulletin
no relevant