1. Gradients in seasonality and seawater oxygen
isotopic composition along the early Permian Gondwanan coast, SE Australia
J. Andrew Beard, Linda C. Ivany, Bruce
Runnegar,
•Accretionary δ18O data from fossil bivalves
reveal early Permian seasonality.
•Glendonites require freezing temperatures
and allow calculation of seawater δ18O.
•Seasonal range and seawater δ18O decrease
toward the Gondwanan south pole.
•We infer a north-flowing, cold, depleted
current along SE Australia in the Permian.
•Summer water temperatures near 10 °C suggest
similarity to mid-Miocene Antarctica.
Keywords: oxygen isotope; Permian; Gondwana;
seasonality; seawater; Eurydesma
2. Rapid last-deglacial thinning and retreat of the marine-terminating
southwestern Greenland ice sheet
Kelsey Winsor, Anders E. Carlson, Marc W.
Caffee, Dylan H. Rood
•SW Greenland marine ice-margins rapidly
deglaciated 12–11 ka.
•SW Greenland land ice-margins deglaciated
slowly 18–7 ka.
•Results suggest ocean environment drove
rapid ice-margin retreat.
Keywords: 10Be exposure dating;
glacial geology; termination I; ocean–ice interaction; Greenland Ice Sheet
3. Volcanic ash fall events identified using principal component analysis
of a high-resolution speleothem trace element dataset
Robert A. Jamieson, James U.L.
Baldini, Amy B. Frappier, Wolfgang Müller
・We present a high-resolution 22-year long LA-ICP-MS
speleothem trace element record.
• Principal
component analysis used for exploratory data analysis of our large dataset.
• We link
historical volcanic eruptions to spikes in Principal Component 1 scores.
• Volcanogenic
material is flushed into the speleothem at the start of the wet season.
Keywords：stalagmite; principal component analysis; volcanic ash;
El Chichón; LA-ICP-MS
♣Geochimica et
Cosmochimica Acta♣
4. Response of dissolved inorganic carbon (DIC) and δ13CDIC to changes in
climate and land cover in SW China karst catchments
Min Zhao, Zaihua Liu, Hong-Chun Li, Cheng
Zeng, Rui Yang, Bo Chen, Hao Yan
5. A simple reactive-transport model of calcite precipitation in soils and
other porous media
G.J.D. Kirk , A. Versteegen, K. Ritz, A.E.
Milodowski
♣Quaternary Science
Reviews♣
6. Radiocarbon chronology of the last glacial maximum and its termination
in northwestern Patagonia
Patricio I. Moreno, George H. Denton, Hugo
Moreno Thomas V. Lowell, Aaron E. Putnam, Michael R. Kaplan
•The NW sector of the Patagonian ice sheet
expanded 5 times between 17,700 and 33,600 cal yrs BP.
•Warming at 17,800 cal yrs BP drove
abrupt expansion of rainforests and withdrawal of Andean glaciers.
•The 17,800 cal yrs BP event was a
decisive trigger for the Last Glacial Termination (LGT).
•Holocene-like conditions were achieved
within 1000 years after the onset of the LGT.
•Northward-shifted westerlies during the LGM
migrated back south at the onset of the LGT.
7. Changes in biomass burning mark the onset an ENSO-influenced climate
regime at 42°S in southwest Tasmania, Australia
Michael-Shawn Fletchera, b, , ,
Alexa Bensona, Hendrik Heijnisc, Patricia S. Gaddc,
Les C. Cwynard, Andrew B.H. Reesd, e
・We reconstruct trends in biomass burning over the last 12,000 years in
southwest at 42°S in Tasmania.
•We identify a switch from millennial to
sub-millennial scale trends in biomass burning after 5 ka.
•We conclude that the onset of ENSO drove
this shift in biomass burning at our sites.
8. A high-resolved record of the Asian Summer Monsoon from Dongge Cave,
China for the past 1200 years
Kan Zhaoa, , Yongjin Wanga, , , R. Lawrence
Edwardsb, , Hai Chengb, c, , Dianbing Liua, , Xinggong Konga,
Stalagmite-based high-resolved Asian monsoon
records over the past 1200 years from China.
•Consistence of annually-band width and
stable isotopic data in recording monsoon variability.
•A big dry event associated with the social
unrest at the end of Ming Dynasty.
•Impacts of tropic SSTs on Asian monsoon
variability overwhelming solar forcing.
•Inverse relationship of Asian and South
American monsoon intensity probably attributed to ITCZ or ENSO.
Keywords：Asian Summer Monsoon; Past millennium; Stalagmite; δ18O;
Dongge Cave; China
9. A chironomid-inferred summer temperature
reconstruction from subtropical Australia during the last glacial maximum (LGM)
and the last deglaciation
Jie Christine Chang , James Shulmeister. Craig Woodward,
, Lincoln Steinberger, , John Tibby, , Cameron Barr
•A
chironomid-based summer temperature reconstruction from Australia.
•Reconstruction
covers the LGM and part of deglaciation.
•Cooling
is similar to that derived from nearby marine records.
•Deglaciation
is synchronous with Antarctica.
•Suggests
climate link from Australian subtropics to high latitudes.
Keywords：Chironomids; Subtropical Australia; Mean February temperature; Last
glacial maximum; The last deglaciation; Paleoclimate reconstruction; Southern
Hemisphere
♣Chemical
Geology♣
♣Paleogeography, Paleoclimatology, Paleoecology♣
♣Quaternary International♣
♣Quaternary
Research♣
♣Quaternary Geochronology♣
♣Global
and Planetary Change♣
なし
