From the abstract of the "Article in Press" Climate and environmental changes during the past millennium in central western Guizhou, China, as recorded by stalagmites ZJD-21 of Tz-Shing et al., We find interesting Zhijin from the Cave in Zhijin county in Guizhou. To write the authors:
The ZJD-21 delta18O record suggests: (1) dry / warm climates during AD 950-1100 (overlapping with most of the Medieval Warm Period, MWP in Europe), (2) Strengthening of the summer monsoon from the MWP toward the beginning of the Little Ice Age (LIA) at AD 1250, (3) realtively wet / cold conditions occurred between AD 1250 and 1500, shown by Relatively light delta18O values;
I also would like the study geomorphic and climatic change over the past 12.900 yr at Swift Current Lake, Glacier National Park, Montana, USA (PDF format, 1.5 MB) by MacGregor et al. .
imagine lead the authors of:
A sediment core, representing a 12.900-yr record collected from Swift Current Lake, located on the eastern side of Glacier National Park, Montana, was analyzed to assess variability in and Holocene latest Pleistocene environment.
MacGregor et al., Abstract
Für uns von Interesse die Analyse der "Period V: 1,3 ka to present":
The most recent period in the Swiftcurrent Lake core ist characterized by generally high %TOC, low C/N ratios and fine-grained sediment (Fig. 7). Period V brackets well-defined climate events including the Medieval Warm Period (MWP) and the Little Ice Age (LIA), and changes in the %TOC record are well-correlated with documented timing of climate changes defining the MWP and LIA. For example, %TOC is relatively high and stable between 1.3 and 0.7 ka, corresponding closely with Increased slightly GISP 2 temperatures.
MacGregor et al., 87
0 comments:
Post a Comment