斯行健(1901～1964)

斯行健字天石,著名地质学家,古植物地史学家.1901年生于浙江省诸暨县.1926年毕业于北京大学地质系后,曾任中山大学地质系助教.1928年初兼任两广地质调查所技佐.同年赴德国留学,从德古植物学大师高腾教授学习,1931年获博士学位.1932年曾到瑞典博物馆从事研究工作,1933年回国,先后任清华地学系教授和北京大学地质系教授,兼任中央研究院地质研究所研究员,1937年起任地质研究所专职研究员.     

地质论评22卷(1964)分类索引

地层对鄂西神农架的展旦耙地层的新就澈·························································……鹤开济(1 .1)北山搞油桩一南坡子泉一带第三耙地层新知················································……张明书(1 .7)山西省南关一富家滩地区晚古生代煤系中火成碎屑岩的发现及其意义···············……刘懊杰(1 .75)桂东南玉林泥盆一石炭系简两个假整合·····,················…     

US tornado fatalities in motor vehicles (1991–2015)

Motor vehicles historically have been dangerous locations to shelter in during tornado events. Throughout the twentieth century, motor vehicle design has become safer while tornado forecasting has become better understood. Despite such advances, tornado fatalities in motor vehicles still occur today, and some events periodically result in high numbers of deaths (e.g., ten motor vehicle occupants were killed by a single tornado in Garland, Texas, in 2015). We seek to examine all US tornado-induced motor vehicle fatalities documented between 1991 and 2015. Our findings indicate that motor vehicle fatalities have not significantly changed during this study period. We attribute annual fatality totals to persons lacking awareness of impending dangers coupled with numbers of significant tornado events for a given year. We find most fatalities result when vehicles are lofted or passengers are ejected, and this most typically occurs at the EF3–EF5 intensity thresholds. Fatalities that occur at weaker tornado winds (EF0–EF2) are most often attributed to collapsing debris (mostly trees) on vehicles. Spatially, motor vehicle fatalities are greatest in the Deep South and southern Great Plains regions where overall tornado and nighttime tornado frequencies are greatest. Some of the largest motor vehicle fatality events have resulted from tornadoes not being distinctly visible to motorists; such events have been characterized by tornadoes occurring at night or by tornadoes not appearing as “classic funnels.”     

地质论评22卷(1964)作者索引

三画马长信:瑜禹蹄状构造·······················································································……马杏垣:北京西山区的窗擂构造简纪·····································································……马宗晋:燕山区地盾构造研究··················································…     

Change in carbon flux (1960–2015) of the Red River (Vietnam)

Global riverine carbon concentrations and fluxes have been impacted by climate and human-induced changes for many decades. This paper aims to reconstruct the longterm carbon concentrations and carbon fluxes of the Red River, a system under the coupled pressures of environmental change and human activity. Based on (1) the relationships between particulate and dissolved organic carbon (POC, DOC) or dissolved inorganic carbon (DIC), and suspended sediments (TSS) or river water discharge and on (2) the available detailed historical records of river discharge and TSS concentration, the variations of the Red River carbon concentration and flux were estimated for the period 1960–2015. The results show that total carbon flux of the Red River averaged 2555?±?639 kton C year^?1. DIC fluxes dominated total carbon fluxes, representing 64% of total, reflecting a strong weathering process from carbonate rocks in the upstream basin. Total carbon fluxes significantly decreased from 2816 kton C year^?1 during the 1960s to 1372 kton C year^?1 during the 2010s and showed clear seasonal and spatial variations. Organic carbon flux decreased in both quantity and proportion of the total carbon flux from 40.9% in 1960s to 14.9% in 2010s, reflecting the important impact of dam impoundment. DIC flux was also reduced over this period potentially as a consequence of carbonate precipitation in the irrigated, agricultural land and the reduction of the Red River water discharge toward the sea. These decreases in TSS and carbon fluxes are probably partially responsible for different negatives impacts observed in the coastal zone.