Rapid glaciation and a two-step sea-level plunge into The Last Glacial Maximum

The approximately 10,000-year-long Last Glacial Maximum, before the termination of the last ice age, was the coldest period in Earth’s recent climate history1. Relative to the Holocene epoch, atmospheric carbon dioxide was about 100 parts per million lower and tropical sea surface temperatures were about 3 to 5 degrees Celsius lower2,3. The Last Glacial Maximum began when global mean sea level (GMSL) abruptly dropped by about 40 metres around 31,000 years ago4 and was followed by about 10,000 years of rapid deglaciation into the Holocene1. The masses of the melting polar ice sheets and the change in ocean volume, and hence in GMSL, are primary constraints for climate models constructed to describe the transition between the Last Glacial Maximum and the Holocene, and future changes; but the rate, timing and magnitude of this transition remain uncertain. Here we show that sea level at the shelf edge of the Great Barrier Reef dropped by around 20 metres between 21,900 and 20,500 years ago, to −118 metres relative to the modern level. Our findings are based on recovered and radiometrically dated fossil corals and coralline algae assemblages, and represent relative sea level at the Great Barrier Reef, rather than GMSL. Subsequently, relative sea level rose at a rate of about 3.5 millimetres per year for around 4,000 years. The rise is consistent with the warming previously observed at 19,000 years ago1,5, but we now show that it occurred just after the 20-metre drop in relative sea level and the related increase in global ice volumes. The detailed structure of our record is robust because the Great Barrier Reef is remote from former ice sheets and tectonic activity. Relative sea level can be influenced by Earth’s response to regional changes in ice and water loadings and may differ greatly from GMSL. Consequently, we used glacio-isostatic models to derive GMSL, and find that the Last Glacial Maximum culminated 20,500 years ago in a GMSL low of about −125 to −130 metres.Financial support of this research was provided by the JSPS KAKENHI (grant numbers JP26247085, JP15KK0151, JP16H06309 and JP17H01168), the Australian Research Council (grant number DP1094001), ANZIC, NERC grant NE/H014136/1 and Institut Polytechnique de Bordeaux

The impact of a medical drama featuring a hospital pharmacist on the perception of pharmacists among high school students and guardians: A quasi-experimental study

Background: A pharmacist's work has shifted from non-personal to in-person services; especially in a super-aging society, further collaboration with other professions is needed. Communication has become an essential skill for pharmacists. However, there is limited public awareness about the work of pharmacists, and their perception among high school students is unclear. Medical dramas have been reported as educational tools for students, including their role in influencing the career choices of health professionals. Objective: This study aimed to evaluate the impact of a TV drama featuring a hospital pharmacist on perceptions of pharmacists among high school students and guardians. Methods: An online survey involving 300 high school students and 300 guardians with their own high school children was conducted before the drama aired, and a post-survey conducted after it finished airing. Regular viewing was defined as exposure in this study. A difference-in-differences approach was used to compare the change in perceptions toward pharmacists' work, required knowledge, aptitude, and communication needs. Results: Comparing before and after they viewed the drama, high school students had significant differences in their perceptions of pharmacist duties such as “one-dose package dispensing” and “health consultation other than medicine,” while guardians had different perceptions of “collaboration with health care professionals” and “information sharing about medication therapy.” Regarding pharmacist aptitude, only guardians showed significant differences in their perceptions of skills such as “precision,” “cooperativeness,” and “decisiveness.” There were no significant differences in the perceived level of communication required for pharmacists. Conclusions: The results indicated that the portrayal of the pharmacist in the drama may have had some impact on high school students and guardians and was considered useful as an opportunity to learn about pharmacists. However, it was suggested that pharmacists should make the public understand that their work requires real-world communication skills

Introduction of 1-m MSBS in Tohoku University, New Device for Aerodynamics Measurements of the Sports Equipment

Support interference in wind tunnel testing is an unavoidable effect. It is difficult to measure the aerodynamic force acting on a model such as a ball owing to this effect [1]. A magnetic suspension and balance system (MSBS) suspends the model without any mechanical supports by using magnetic force, and at the same time, can measure the aerodynamic force acting on the model. The 1-m MSBS, located at the Institute of Fluid Science, Tohoku University, is the world’s largest MSBS. It has a 1-m-wide octagonal cross section. A sphere is taken as the experimental object, and the results of the aerodynamic force acting on it are presented. The diameter of the sphere is 150 mm, and its blockage ratio is 2.1%. The experiment was conducted at Reynolds numbers ranging from 0.5 × 105 to 4.7 × 105. It clearly shows the drag crisis at approximately Re = 3.7 × 105, and the fluctuation of the sphere abruptly increase around this region