Damped fluctuations in Chinese loess grain size

Mathematics – Logic

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Meteorology And Atmospheric Dynamics: Paleoclimatology, Information Related To Geographic Region: Asia, Information Related To Geologic Time: Cenozoic

Scientific paper

The sediment record of the loess-paleosol sequence in the Chinese Loess Plateau reveals a strong relationship between grain size fluctuations and glacial-interglacial cycles documented by marine oxygen isotope variations. However, on tectonic time scales, differences between the loess-paleosol grain size record and the marine oxygen isotope record can be identified. Analytical results from the Baishui, Jingchuan and Lingtai sections show that the grain size of eolian loess, superimposed on a coarsening trend, has two abrupt shifts at about 2.55 and 1.25 Ma, which are followed by significantly damped fluctuations in grain size. This is different from the global oxygen isotope record which demonstrates higher amplitude variations since the late Pliocene-early Pleistocene and lacks analogs of the abrupt shifts. We propose that the progressive uplift of the Tibetan plateau may have forced the regional environmental system across two thresholds at the late Pliocene-early Pleistocene and the middle Pleistocene, respectively, inducing two pulses of climatic and environmental changes over north-western China which are superimposed on the global cooling trend and orbital climate changes.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Damped fluctuations in Chinese loess grain size does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Damped fluctuations in Chinese loess grain size, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Damped fluctuations in Chinese loess grain size will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-918463

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.