2010 ◽  
Vol 84 (6) ◽  
pp. 1391-1400 ◽  
Author(s):  
DENG Jun ◽  
XIAO Changhao ◽  
WANG Qingfei ◽  
ZHOU Xingzhi ◽  
YANG Liqiang ◽  
...  

2020 ◽  
Vol 81 ◽  
pp. 1-14
Author(s):  
M Keyimu ◽  
Z Li ◽  
Y Zhao ◽  
Y Dong ◽  
B Fu ◽  
...  

Historical temperature reconstructions at high altitudes are still insufficient in southwestern China, which is considered one of the most sensitive areas to climate change in the world. Here we developed a tree ring-width chronology of Faxon fir Abies fargesii var. faxoniana at the upper timber line on Zhegu Mountain, Miyaluo Scenic Area, western Sichuan, China. The climate-tree growth relationship analysis indicated temperature as the dominant regulator on radial tree growth in this region. The reconstruction of aggregated maximum temperature (TMX) of autumn and winter for the period 1856-2016 was achieved with a linear regression model that accounted for 43.6% of the actual variability in the common time series (1954-2016). The reconstruction identified 4 warm periods and 3 cold periods. Similarities of warm and cold periods with previously published reconstructions from nearby sites indicated the reliability of our reconstruction. The significant positive correlation between TMX reconstruction and the Asian-Pacific Oscillation index and the Atlantic Multi-decadal Oscillation index suggested a linkage between large-scale climate circulations and the thermal variability at a multi-decadal scale on the western Sichuan Plateau. We also found that solar activity exerted a strong influence on decadal temperature variability in this region. The cold periods were matched well with historical large volcanic eruptions. Our results strengthen the historical climatic information in southwestern China and contribute to further understanding the regional thermal variability as well as its driving mechanism.


1945 ◽  
Vol 14 (2) ◽  
pp. 16-22
Author(s):  
William C. Johnstone
Keyword(s):  

2017 ◽  
Vol 1 (1) ◽  
pp. 1-6
Author(s):  
Jennifer M. Bernstein

Vickers Hot Springs is located near the rural Southern California town of Ojai, and local residents have long enjoyed soaking in the sulfuric pools. But as knowledge of the springs spread, the area saw increases in fights, traffic, burglaries, and drug use. In response, two residents purchased the land and committed to restore the property while allowing limited public access, subsequently generating a great deal of controversy within the community. Privatizing Vickers Hot Springs follows the archetypical lesson of Garrett Hardin's 1968 essay, “The Tragedy of the Commons.” Hardin stated that the problem for common-pool resources was that a finite amount of services are demanded by a potentially infinite number of users, who have little to gain by sacrificing for the common good. But Hardin's theory does not always apply. Many communities have come together to manage resources, often without government oversight. Thus, the question is not whether or not Hardin's theory is accurate, but rather “under what conditions it is correct and when it makes the wrong predictions.” Case studies provide nuance to the broad brushstrokes of a theory, and whether Hardin's parable is applicable depends on the particularities of the common property resource conflict. Employing the frameworks established by Hardin, Dietz et al., and Ostrom, this paper examines the management of Vickers Hot Springs within its broader social, ecological, and political context, asking whether the particular circumstances of this resource use conflict made privatization the most predictable outcome.


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