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Full-Text Articles in Physical Sciences and Mathematics
Dynamic Diatom Response To Changing Climate 0-1.2 Ma At Lake El'gygytgyn, Far East Russian Arctic, Jeffrey Allan Snyder, M. V. Cheraponova, A. Bryan
Dynamic Diatom Response To Changing Climate 0-1.2 Ma At Lake El'gygytgyn, Far East Russian Arctic, Jeffrey Allan Snyder, M. V. Cheraponova, A. Bryan
School of Earth, Environment and Society Faculty Publications
The Lake El' gygytgyn sediment record contains an abundant diatom flora through most intervals of the lake's history, providing a means to create and test hypotheses concerning the lake's response to changing climates. The 0 1.2 Ma core interval is characterized by shifts in the dominant planktonic genera and events of exceptional concentration and diversity. Warm interglacial intervals have enhanced concentration and diversity of the plankton. This response is most extreme during exceptional events corresponding to marine isotope stages (MIS) 11 and 31. Diatom concentration and diversity also increase during some cold intervals (e.g., MIS 2), suggesting conditions of lake …
Oxygen And Hydrogen Diffusion In Minerals, John Richard Farver
Oxygen And Hydrogen Diffusion In Minerals, John Richard Farver
School of Earth, Environment and Society Faculty Publications
This chapter provides a summary and review of experimentally determined oxygen and hydrogen volume diffusion in minerals. A very extensive and detailed review of stable isotope exchange processes including oxygen and hydrogen volume diffusion can be found in Cole and Chakraborty (2001) and a detailed review of hydrogen diffusion in minerals, especially nominally anhydrous minerals, can be found in Ingrin and Blanchard (2006). In addition, a detailed review of oxygen and hydrogen diffusion in silicate melts is provided by Zhang and Ni (2010), and oxygen and hydrogen diffusion rates can also be found in the chapters, in this volume, on …
Understanding Relationships Between The 1998 Yangtze River Flood And Northeast Eurasian Blocking, Arthur N. Samel, Xin-Zhong Liang
Understanding Relationships Between The 1998 Yangtze River Flood And Northeast Eurasian Blocking, Arthur N. Samel, Xin-Zhong Liang
School of Earth, Environment and Society Faculty Publications
Severe summer monsoon flooding occurred along the Yangtze River Valley (YRV) in 1998. The heaviest precipitation fell during June 8-23 and July 20-29 and coincided with midtropospheric blocking over northeast Eurasia. An index based on the difference between Okhotsk High and west Pacific Low intensity is developed in this study to quantify blocking; analysis shows that blocking and equatorward displacement of the upper-tropospheric east Asian jet preceded (accompanied) the June (July) period. This suggests that heavy rainfall during each interval was caused by different atmospheric processes. An examination of joint variations in the index and YRV precipitation during 1958-1998 revealed …
Depositional History Of The Eocene Chumstick Formation: Implications Of Tectonic Partitioning For The History Of The Leavenworth And Entiat-Eagle Creek Fault Systems, Washington - Reply, James E. Evans
School of Earth, Environment and Society Faculty Publications
No abstract provided.
Depositional History Of The Eocene Chumstick Formation - Implications Of Tectonic Partitioning For The History Of The Leavenworth And Entiat-Eagle Creek Fault Systems, Washington, James E. Evans
School of Earth, Environment and Society Faculty Publications
The Chumstick basin opened as an extensional half-graben prior to 51 Ma, and was subsequently modified by two episodes of tectonic partitioning of drainage prior to basin deformation. Initially, westward flowing fluvial systems formed a unified depositional system with the Swauk basin. Tectonic partitioning of drainage at 51-49 Ma and at 44-42 Ma was controlled by localized uplift on the Leavenworth (LFZ), Eagle Creek (ECFZ), and Entiat (EFZ) fault zones and led in each instance to the truncation of regional depositional systems, modification and reversal of paleoflow, and internal drainage. Relief on the LFZ at 51-49 Ma may be the …