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1938年,中国人民的好朋友美国新闻记者埃德加·斯诺先生,只身一人从陕西省的西安向北走进陕北革命根据地。从西安到陕北途中,正好穿过中国黄土高原最为典型的地区。面对眼前遍地黄土和千沟万壑的奇特地形景观,斯诺先生感到困惑不解。后来,他在《西行漫记》中写道：这是一片多么可怕的地方,简直就是＂疯神＂捏就的土地! 相似文献
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Myoung-Joo LEE Ki-Ho CHANG Gyun-Myoung PARK Jin-Yim JEONG Ha-Young YANG Ki-Deok JEONG Joo-Wan CHA Sung-Soo YUM Jae-Cheol NAM Kyungsik KIM Byung-Chul CHOI 《大气科学进展》2009,26(2):222-228
The snow enhancement experiments, carried out by injecting AgI and water vapor into orographically enhanced clouds (fog), have been conducted to confirm Li and Pitter’s forced condensation process in a natural situation. Nine ground-based experiments have been conducted at Daegwallyeong in the Taebaek Mountains for the easterly foggy days from January–February 2006. We then obtained the optimized condi- tions for the Daegwallyeong region as follows: the small seeding rate (1.04 g min-1) of AgI for the easte... 相似文献
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An Overview of the Studies on Black Carbon and Mineral Dust Deposition in Snow and Ice Cores in East Asia 
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下载免费PDF全文 Black carbon （BC） is the most eff ective insoluble light-absorbing particulate （ILAP）, which can strongly absorb solar radiation at visible wavelengths. Once BC is deposited in snow via dry or wet process, even a small amount of BC could signifi cantly decrease snow albedo, enhance absorption of solar radiation, accelerate snow melting, and cause climate feedback. BC is considered the second most important component next to CO2 in terms of global warming. Similarly, mineral dust （MD） is another type of ILAP. So far, little attention has been paid to quantitative measurements of BC and MD deposition on snow surface in the midlatitudes of East Asia, especially over northern China. In this paper, we focus on reviewing several experiments performed for collecting and measuring scavenging BC and MD in the high Asian glaciers over the mountain range （such as the Himalayas） and in seasonal snow over northern China. Results from the surveyed literature indicate that the absorption of ILAP in seasonal snow is dominated by MD in the Qilian Mountains and by local soil dust in the Inner Mongolian region close to dust sources. The detection of BC in snow and ice cores using modern techniques has a large bias and uncertainty when the snow sample is mixed with MD. Evidence also indicates that the reduction of snow albedo by BC and MD perturbations can signifi cantly increase the net surface solar radiation, cause surface air temperature to rise, reduce snow accumulation, and accelerate snow melting. 相似文献
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