Twelve thousand years of dust: the Holocene global dust cycle constrained by natural archives
Summary: We propose an innovative framework to organize paleodust records, formalized in a publicly accessible database, and discuss the emerging properties of the global dust cycle during the Holocene by integrating our analysis with simulations performed with the Community Earth System Model. We show how the size distribution of dust is intrinsically related to the dust mass accumulation rates, and that only considering a consistent size range allows for a consistent analysis of the global dust cycle.
S. Albani, N. M. Mahowald, G. Winckler, R. F. Anderson, L. I. Bradtmiller, B. Delmonte, R. François, M. Goman, N. G. Heavens, P. P. Hesse, S. A. Hovan, K. E. Kohfeld, H. Lu, V. Maggi, J. A. Mason, P. A. Mayewski, D. McGee, X. Miao, B. L. Otto-Bliesner, A. T. Perry, A. Pourmand, H. M. Roberts, N. Rosenbloom, T. Stevens, and J. Sun Clim. Past Discuss., 10, 4277-4363, 2014 AbstractDiscussion Paper (PDF, 6250 KB)Supplement (8823 KB)Interactive Discussion (Open, 0 Comments)Manuscript under review for CP
Diminished greenhouse warming from Archean methane due to solar absorption lines
Summary: High methane concentrations are thought to have helped sustain warm surface temperatures on the early Earth (~3 billion years ago) when the sun was only 80% as luminous as today. However, radiative transfer calculations with updated spectral data show that methane is a stronger absorber of solar radiation than previously thought. In this paper we show that the increased solar absorption causes a redcution in the warming ability of methane in the Archean atmosphere.
Carbon isotope (δ13C) excursions suggest times of major methane release during the last 14 ka in Fram Strait, the deep-water gateway to the Arctic
Summary: A sediment core collected from a pockmark field on the Vestnesa Ridge (~80N) in the Fram Strait is presented. Our results show an undisturbed sedimentary record for the last 14 ka BP and negative carbon isotope excursions (CIEs) during the Bølling-Allerød interstadials and during the early Holocene. Both CIEs relate to periods of ocean warming, sea level rise and increased concentrations of methane (CH4) in the atmosphere, suggesting an apparent correlation with warm climatic events.
A 500 year seasonally resolved δ18O and δ13C, layer thickness and calcite fabric record from a speleothem deposited in equilibrium of the Han-sur-Lesse cave, Belgium
M. Van Rampelbergh, S. Verheyden, M. Allan, Y. Quinif, H. Cheng, L. Edwards, E. Keppens, and P. Claeys Clim. Past Discuss., 10, 4149-4190, 2014 AbstractDiscussion Paper (PDF, 4049 KB)Interactive Discussion (Open, 1 Comment)Manuscript under review for CP
22 Oct 2014
Sea level trends in South East Asian Seas (SEAS)
M. W. Strassburg, B. D. Hamlington, R. R. Leben, P. Manurung, J. Lumban Gaol, B. Nababan, S. Vignudelli, and K.-Y. Kim Clim. Past Discuss., 10, 4129-4148, 2014 AbstractDiscussion Paper (PDF, 1958 KB)Interactive Discussion (Open, 2 Comments)Manuscript under review for CP
17 Oct 2014
The bivalve Glycymeris planicostalis as a high-resolution paleoclimate archive for Rupelian (Early Oligocene) of Central Europe
Northern Hemisphere control of deglacial vegetation changes in the Rufiji uplands (Tanzania)
I. Bouimetarhan, L. Dupont, H. Kuhlmann, J. Pätzold, M. Prange, E. Schefuß, and K. Zonneveld Clim. Past Discuss., 10, 3931-3964, 2014 AbstractDiscussion Paper (PDF, 882 KB)Interactive Discussion (Open, 0 Comments)Manuscript under review for CP
30 Sep 2014
Spatial climate dynamics in the Iberian Peninsula since 15 000 Yr BP
P. Tarroso, J. Carrión, M. Dorado-Valiño, P. Queiroz, L. Santos, A. Valdeolmillos-Rodríguez, P. Célio Alves, J. C. Brito, and R. Cheddadi Clim. Past Discuss., 10, 3901-3930, 2014 AbstractDiscussion Paper (PDF, 1492 KB)Supplement (1419 KB)Interactive Discussion (Open, 0 Comments)Manuscript under review for CP
26 Sep 2014
Technical Note: How accurate can stalagmite formation temperatures be determined using vapour bubble radius measurements in fluid inclusions?
F. Spadin, D. Marti, R. Hidalgo-Staub, Y. Krüger, J. Rička, D. Fleitmann, and M. Frenz Clim. Past Discuss., 10, 3689-3713, 2014 AbstractDiscussion Paper (PDF, 2688 KB)Interactive Discussion (Open, 1 Comment)Manuscript under review for CP
09 Sep 2014
Geothermal evidence of the Late Pleistocene-Holocene orbital forcing (example from the Urals, Russia)