September 2018 Issue, Volume 86, No. 9
Human activities over the past 200 years have increased Earth's greenhouse effect by about 1% relative to the radiative fluxes that drive the climate system. This Resource Letter introduces the physics of this intensified greenhouse effect and of the processes that govern resultant change in climate and provides resources for further study. Context for this examination is provided in a companion Resource Letter (GECC-1) that examined the radiative fluxes that comprise Earth's climate system and the present-day greenhouse effect. The increase in global temperature and other changes in climate resulting from the intensified greenhouse effect are of great societal concern. Developing prognostic capability to determine these responses to the small perturbations that constitute the intensified greenhouse effect to an accuracy that would be useful to inform policymaking is the major challenge facing climate scientists today.
Resource Letter GECC-2: The Greenhouse Effect and Climate Change: The Intensified Greenhouse Effect by Stephen E. Schwartz. DOI: 10.1119/1.5045577.
Teaching of the harmonic oscillator damped by a constant force: The use of analogy and experiments by R. Hauko, D. Andreevski, D. Paul, M. ŠterkS, and R. Repnik. DOI: 10.1119/1.5044654.
Which part of a chain breaks? by Seung Ki Baek. DOI: 10.1119/1.5045661.
New strategy for the Puluj-type experiment by Tiberius O. Cheche. DOI: 10.1119/1.5046955.
Lagrangian vs Hamiltonian: The best approach to relativistic orbits by Richard H. Price, and Kip S. Thorne. DOI: 10.1119/1.5047439.
Subtleties with Young's double-slit experiment: Investigation of spatial coherence and fringe visibility by David P. Jackson, Natalie Ferris, Ruthie Strauss, Hongyi Li, and Brett J. Pearson. DOI: 10.1119/1.5047438.
Reflected diffraction from linearly patterned surfaces by Jing Liang, Jiajun Liang, Ka Lun Leung, Ho Ting Fung, and Iam Keong Sou. DOI: 10.1119/1.5043291.
A simulated annealing approach to the student-project allocation problem by Abigail H. Chown, Christopher J. Cook, and Nigel B. Wilding. DOI: 10.1119/1.5045331.
Back of the Envelope
Keeping your balance by Sanjoy Mahajan. DOI: 10.1119/1.5049353.
Apparatus and Demonstration Notes
Colliding without touching: Using magnets and copper pipe fittings to explore the energetics of a completely inelastic collision by Lane Seeley, and Eun-Hee Shin. DOI: 10.1119/1.5042538.
Nonlinear Optics: A Student's Perspective—With Python Problems and Examples by Elsa Garmire. DOI: 10.1119/1.5049589.