The relationship between the precipitation fields of Yunnan in May and the ocean surface temperature anomaly fields in the tropical Pacific in the previous May-April intervals during 1963-1993 is studied by using canonical correlation analysis. The result is tested satisfactorily by precipitation forecasts of 1994 and 1995 in Yunnan
A simple method for the determination of saturation intensities and in some cases generalized cross sections in multiphoton ionization is presented. It utilizes the dependence of the ponderomotive shift on the laser intensity above the saturation limit. An application to He and Ar interacting with 500 fs pulses at 248 nm is demonstrated. Experimental results are compared with theoretical calculations.
Following the research of calamity tourism, the author points out seven causes of tourism crisis. Six preventive ways and methods are given: ①to establish a warning system and prepare tourism crisis management; ②to establish a tourism crisis response system to control tourism crisis; ③to contact with the modern mass media to give the tourists some active information; ④the governments should support tourism companies to keep them in tourism industry; ⑤strengthen tourism marketing to recover regional tourism after tourism crisis;⑥to take measures to recover tourists markets by leading events tourism.
Assessing the vulnerability of biodiversity under global climate change is one of the major tasks in ecology and conservation biology. Although species' vulnerability to climate change depends on habitat exposure, species sensitivity and adaptability, multifaceted studies on the impacts of climate change on biodiversity are still lacking. The aim of this study was to fill this gap by assessing the vulnerability of giant panda with its sympatric mammal species in Sichuan province of China, through the climate niche factor analysis. We found that species sensitivity plays a greater role than habitat exposure in determining the vulnerability of these species under future climate change, which doesn't closely match their current conservation status. Besides, these mammals were predicted to be more vulnerable at lower altitudes or latitudes. In particular, Daxiangling and Liangshan mountains emerge as the most vulnerable places to climate change. The conservation gap analysis demonstrated that the current protected area network covers no more than 5 % of the most vulnerable areas. Together, these results highlight the importance of using multifaceted analyses by integrating species sensitivity and habitat exposure to assess climate-related risks to better inform biodiversity conservation and management.
Based on the statistical data of crop yield in 1995,2000,2004 and monthly average meteorological data,carbon stock,carbon density and carbon sequestration potential of crops were assessed using corresponding models and GIS spatial analysis methods in the Upper Yangtze River Basin.The results indicated that carbon stock of crops increased from 1995 to 2000 by 9.3 %,and decreased from 2000 to 2004 by 6.4 %.Carbon density was high in southeast and low in northwest in the Upper Yangtze River Basin.Sichuan Basin has great potential for carbon sequestration.Further enhancing productivity of crops in the hilly area of Sichuan Basin is the key to improve carbon sequestration capacity of farmland ecosystem and to maintain carbon sequestration functions in the Upper Yangtze River Basin.
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