Results 71 to 80 of about 233,985 (228)

Application of the Thermal Luminescence Method to Eolian Dust Deposits Research.

The Quaternary Research (Daiyonki-Kenkyu), 1998
熱ルミネセンスの風成塵研究への応用として,(1)風成塵堆積物の認定の方法,(2)TL年代測定への応用について述べた.前者は天然石英の熱ルミネセンスカラーイメージ(TLCI)に青色(花崗岩・変成岩起源)と赤色(火山灰・火山岩起源)が存在することに基づいている.フォトスキャナーによるTLCI-CIAを行ったところ,風成塵堆積物や北海道豊富町の粘土試料はいずれも青領域のTLCIを,火山灰は赤領域のTLCIを示した.また,付加線量法によるTL年代測定を試みた.成果は初歩的段階にあり,今後,細粒粒子を用いる際の実験方法や年間蓄積線量の測定法を確立する必要がある.本論では,青森県東北町の既存のToyaテフラの年代をもとに,中-後期更新世の粘土層のTL強度から年代を推定したところ,47 ...
Ganzawa, Yoshihiro, Kubokita, Kouji, Suzuki, Naota, Osanai, Fuminori   +3 more
openaire   +2 more sources

Photochemical effects of Mars‐like UV irradiation on carboxylic acids in carbonaceous chondrites and expectations for abiotic background organics on Mars

Meteoritics &Planetary Science, EarlyView.
Abstract In the search for life on Mars, understanding the origin of preserved organics is critical. Expected sources include exogenous delivery, endogenous synthesis, and potentially life. Environmental processing by ultraviolet (UV) irradiation can alter these organics, obscuring hallmarks of their origin. To deconvolve these effects, we conducted an
D. K. Buckner, J. C. Aponte, A. C. Schuerger, D. I. Foustoukos, F. Seguin, M. B. Wilhelm, G. Cooper, A. J. Williams   +7 more
wiley   +1 more source

Modelling soil dust aerosol in the Bodélé depression during the BoDEx campaign [PDF]

, 2006
We present regional model simulations of the dust emission events during the Bodélé Dust Experiment (BoDEx) that was carried out in February and March 2005 in Chad. A box model version of the dust emission model is used to test different input parameters
Todd, M., J Helmert (16052072), Dubovik, O., Dubovik, O, J. Helmert, B. Heinold, Tegen, I, R. Washington, Helmert, J, Washington, R, Tegen, I., I Tegen (16051628), Heinold, B, M. Todd, Todd, MC, Heinold, B., Martin Todd (4462747), B Heinold (16051742), I. Tegen, O. Dubovik, Washington, R., O Dubovik (8761467), Helmert, J., R Washington (16051622)   +23 more
core   +2 more sources

Alternative approaches to dryland reclamation enhance vegetation cover and soil stability at a former uranium mine

Restoration Ecology, EarlyView.
Abstract Introduction Conventional reclamation methods to recover dryland ecosystems after mineral extraction often have low success. Alternative reclamation techniques may help overcome the many challenges to establishing persistent native vegetation and stable soils.
Kathryn D. Eckhoff, Rebecca K. Mann, Seth M. Munson, Katherine Walton‐Day, Jo E. Hinck, Michael C. Duniway   +5 more
wiley   +1 more source

Saharan dust and ice nuclei over Central Europe [PDF]

, 2010
Surface measurements of aerosol and ice nuclei (IN) at a Central European mountain site during an episode of dust transport from the Sahara are presented.
B. Nillius, Levin, Zev, Barrie, Leonard A., Nillius, Björn, M. Ebert, Bingemer, Heinz, S. Weinbruch, Ebert, Martin, Nickovic, Slobodan, Haunold, Werner, H. Klein, U. Bundke, Klein, Holger, Bundke, Ulrich, Weinbruch, Stephan, H. Bingemer, L. Schuetz, Z. Levin, Schuetz, Lothar, L. A. Barrie, S. Nickovic, W. Haunold   +21 more
core   +2 more sources

Disturbance legacies in arid environments shape recovery of former agricultural land

Restoration Ecology, EarlyView.
Abstract Introduction Increasingly, arid agricultural land is being permanently taken out of irrigated production due to more frequent drought, higher temperatures, and the overconsumption of groundwater, with important ramifications for ecological recovery.
Laurel M. Brigham, Nicole M. Fiore, Julie C. Coffey, Sarah Kimball, R. Travis Brooks, Megan E. Lulow   +5 more
wiley   +1 more source

Application of Multi‐Method Dating for Understanding the Gravettian North of Moravia, Central Europe

Archaeometry, Volume 68, Issue 5, Page 1050-1061, October 2026.
ABSTRACT This article presents the results of integrating three methods to assess the age of the Upper Palaeolithic site of Pietraszyn 11 (SW Poland), close to the Moravian Gate. Sediment chronology determined using optically stimulated luminescence produced promising, yet ambiguous results (51.0 ± 3.7 to 20.3 ± 0.7 ka).
A. Wiśniewski, B. Bujalska, D. Popović, M. Baca, K. Zarzecka‐Szubińska, A. Lemanik, M. Hein, S. Talamo, P. Moska, H. Fewlass, D. Tokarz, Z. Jary, B. Przybylski, D. Bobak, M. Połtowicz‐Bobak, K. Wertz, A. Nadachowski   +16 more
wiley   +1 more source

Dust emission in powder handling: Free falling particle plume characterisation [PDF]

, 2009
Dust generation during solids handling, principally from the free falling of bulk materials and their impact on stockpiles, can be a health threat for operators and a cause of dust explosions.
Ansart, Renaud, De Ryck, Alain, Dodds, John A.   +2 more
core   +1 more source

Spatial and temporal evolution of a coastal erg margin: The Middle Jurassic Page Sandstone, southern Utah, USA

Sedimentology, Volume 73, Issue 6, Page 2081-2119, October 2026.
ABSTRACT Aeolian deflationary events are erosive to static stages where sediment supply is insufficient to support bedform migration and preservation in the rock record. In the vicinity of shallow‐marine environments, inland rises of relative water table and associated generation of deflationary super surfaces may be driven by the onset of ...
Victor J. P. Hême de Lacotte, Chester H. C. Davies, Briony J. Bowler, Stuart M. Clarke, Thomas J. H. Dodd   +4 more
wiley   +1 more source

Reconstructions of eolian dust accumulation in northwest African margin sediments

, 2013
Reconstructions of eolian dust accumulation in northwest African margin sediments provide important continuous records of past changes in atmospheric circulation and aridity in the region.
McGee, David, Louisa I Bradtmiller (6975878), Gisela Winckler (6975875), Jan-Berend W Stuut (6885197), Stuut, Jan-Berend W, Peter B deMenocal (6965519), Winckler, Gisela, deMenocal, Peter B, Bradtmiller, Louisa I, David McGee (6887027)   +9 more
core   +1 more source