North American Weather Regimes Are Becoming More Persistent: Is Arctic Amplification a Factor?

CMIP5 Projections of Arctic Amplification, of the North American/North Atlantic Circulation, and of Their Relationship

Recent studies have hypothesized that Arctic amplification, the enhanced warming of the Arctic region compared to the rest of the globe, will cause changes inmidlatitude weather over the twenty-first century. This study exploits the recently completed phase 5 of the Coupled Model Intercomparison Project (CMIP5) and examines 27 state-of-the-art climate models to determine if their projected chan...

Is HIV becoming more virulent?

Evidence linking Arctic amplification to extreme weather in mid-latitudes

[1] Arctic amplification (AA) – the observed enhanced warming in high northern latitudes relative to the northern hemisphere – is evident in lower-tropospheric temperatures and in 1000-to-500 hPa thicknesses. Daily fields of 500 hPa heights from the National Centers for Environmental Prediction Reanalysis are analyzed over N. America and the N. Atlantic to assess changes in north-south (Rossby)...

Are the Young Becoming More Disabled? -- Appendix

Are US Industries Becoming More Concentrated?

More than 75% of US industries have experienced an increase in concentration levels over the last two decades. Firms in industries with the largest increases in product market concentration have enjoyed higher profit margins, positive abnormal stock returns, and more profitable M&A deals, suggesting that market power is becoming an important source of value. Lax enforcement of antitrust regulat...