Raman OH stretching vibration of ice Ih

From our recent research on ice I_h (hexagonal ice), we deduce that free OH groups exist at the ice surface and that dangling OH influences the interior of the proton-disordered ice. Additionally, exploiting recent research by others on water molecular clusters, we propose a new interpretation for the Raman OH stretching vibration of ice I_h. We deconvolute the Raman OH stretching vibration of ice I_h into four sub-bands, with each sub-band being ascribed to OH vibrations engaged in different types of hydrogen bonding.     

Estimation on the response of glaciers in China to the global warming in the 21st century

Glaciers in China can be categorized into 3 types, i.e. the maritime (temperate) type, sub-continental (sub-polar) type and extreme Continental (polar) type, which take 22%, 46% and 32% of the total existing glacier area (59 406 km2) respectively. Researches indicate that glaciers of the three types show different response patterns to the global warming. Since the Maxima of the Little Ice Age (the 17th century), air temperature has risen at a magnitude of 1.3℃on average and the glacier area decreased corresponds to 20% of the present total glacier area in western China. it is estimated that air temperature rise in the 2030s, 2070s and 2100s will be of the order of 0.4-1.2, 1.2-2.7 and 2.1-4.0 K in western China. With these scenarios, glaciers in China will suffer from further shrinkage by 12%, 28% and 45% by the 2030s, 2070s and 2100s. The uncertainties may account for 30%-67% in 2100 in China.     

Precipitation variations recorded in Guliya ice core in the past 400 years

Based on the Guliya ice core records, the precipitation in the past 400 years was retrieved. Its rela tions with other regions were also analyzed. The results demonstrated that there were two high-precipitation periods and two low-precipitation periods in Guliya ice core since 1571 AD. The average precipitation in the two high-precipitation periods was 42 mm (21%) higher than that in the two low-precipitation periods. The precipitation recorded in the Guliya ice core was consistent with that in Dunde ice core. The variation trends of precipitation in the Guliya ice core and the northern hemisphere are similar. During the extremely wet years in the northern hemisphere, the precipitation recorded in the Guliya ice core was two times the long-term average. However, the annual precipitation was 38% less than that of the long-term average in extremely dry years.     

Population dynamics and phenology of two congeneric and sympatric lynx spiders Peucetia rubrolineata Keyserling, 1877 and Peucetia flava Keyserling, 1877 (Oxyopidae)

Numerous phenological studies on spiders belonging to the families Oxyopidae, Thomisidae, Lycosidae, Selenopidae (e.g. Selenops cocheleti) and Salticidae (e.g. Psecas chapoda and Psecas viridipurpureus) have been conducted in the neotropical region. However, studies that simultaneously compare population dynamics and age structure in populations of sympatric species are limited, especially in Oxyopidae. The population dynamics and phenology of two congeneric lynx spider (Peucetia rubrolineata and Peucetia flava) were examined in southeastern Brazil. Several characteristics of the age structure were compared between the two spider species. The variation in the total abundance of individuals and age structure and their relationship with climatic variables were similar between the two spiders. Adults of these spiders were present mainly in spring, indicating an annual reproductive cycle and a ‘stenochronous spring’ phenological pattern. The recruitment of spiders occurred in summer for P. rubrolineata and P. flava, followed by successive phenological peaks at all stages of development. Rainfall and temperature had a positive correlation to population flux in the two spider species studied. Despite the significant climatic effects observed in the Serra do Japi, the phenological pattern of the population in this study was not always repeated in other species of spiders (e.g. Selenops cocheleti).     

A comparison of the Medieval Warm Period, Little Ice Age and 20th century warming simulated by the FGOALS climate system model

To compare differences among the Medieval Warm Period (MWP), Little Ice Age (LIA), and 20th century global warming (20CW), six sets of transient and equilibrium simulations were generated using the climate system model FGOALS_gl. This model was developed by the State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences. The results indicate that MWP warming is evident on a global scale, except for at mid-l...     

《冰河世纪3》电影对白的文体学探析

以文体学理论为视角,从语音、词汇、语/句法、语义四个角度对美国卡通电影《冰河世纪3:恐龙的黎明》的对白进行了文体学分析.     

西藏拉萨市成年藏族体重指数相关性分析

目的：通过对西藏拉萨市成年藏族居民体重指数（BMI）的研究,探讨BMI与年龄和受教育程度间的关系。方法：对随机抽样的602名藏族居民的问卷以及身高、体重进行统计分析。结果：拉萨市成年藏族居民BMI均值为24.37±4.15,其中男性的BMI为23.92±3.97,女性的BMI为24.64±4.23;BMI与年龄呈正相关（p〈0.05）,与受教育程度呈负相关（p〈0.05）。结论：拉萨市成年藏族居民的BMI均值高于全国成人BMI总体平均值,BMI随年龄增长而递增,女性的BMI随受教育程度的提高而递减。     

冰雪天气下高速公路交通安全保障体系的建立

在高速公路运营过程中,自然灾害风险是最直接也是最主要的风险之一,其中对于西北地区高速公路而言,冰冻、雨雪、大雾等各种恶劣天气是对高速公路交通造成重大影响的主要因素。本文通过分析冰雪天气对高速公路行车造成的影响,以及现阶段我国高速公路应对冰雪天气工作存在的弊端,提出了建立有效的冰雪天气下高速公路交通安全保障体系。