Over 10 years ago, Prof. Lorenzo Polvani & Dr. Seok-woo Son led a study that found, through the analysis of climate models, that the closing of the ozone hole was going to halt the poleward drift of the jet stream in the Southern Hemisphere. But that study was based on predictive modeling, not actual observations. Now, new research, led by his former postdoc Antara Banerjee, demonstrates that the earlier study’s prediction is actually happening: observations now show that, over the last 20 years, the jet stream in the Southern Hemisphere has indeed stopped drifting poleward, as the 2008 models had indicated.
Sobel writes, "With this disaster, even more than with a hurricane, we will need to rely on each other, on a much larger scale & for a much longer time than any of us are accustomed to. We need young & healthy people to take all possible measures not to get the virus — even at possible cost to themselves, & even though their own risk of suffering serious harm from the virus is very low — in order to slow the spread for the benefit of those most at risk. And as economic activity declines with widespread social isolation, we need those whose livelihoods are not at risk to give some consideration to those whose are, & support them."
Arctic and Antarctic ice loss will account for about one-fourth of the warming that is projected to happen in the tropics, according to a new study published in Nature Geoscience led by Mark England, a polar climate scientist at Scripps Institution of Oceanography at the University of California San Diego, and Lorenzo Polvani, Maurice Ewing and J. Lamar Worzel Professor of Geophysics at Columbia Engineering.
Prof. Oleg Gang is part of a collaborative team of researchers from Columbia Engineering and Brookhaven National Lab that has designed and synthesized molecule chains to efficiently protect 3-D DNA nanostructures from structural degradation under a variety of biomedically relevant conditions.
By capturing the laser-induced structural changes happening in polycrystalline gold thin films over time, scientists determined that melting does not occur uniformly—a finding that could have implications to laser micromachining of precision parts