2014

This week GS Yang Tian will lead the discussion on the attached paper titled ”weakening of the stratospheric polar vortex by Arctic sea-ice loss." Attached is also a related review paper by Cohen et al (2014). Briefly: "In spite of mean global surface...

GS Jiahua Guo will be discussing Lewis and Karoly (2013) and Perkins et al. (2014), attached. She summarizes the discussion below: The Australian ‘angry summer” of 2012/2013 was the warmest on record since1910. Such high temperatures are also coincident...

Speaker: Dr. Susan Lozier (Duke University) Abstract: The global overturning of ocean waters involves the equatorward transport of cold, deep waters and the poleward transport of warm, near-surface waters. Such movement creates a net poleward transport of...

Speaker: Dr. Alan Betts ( Atmospheric Research) Abstract: The recent release of a remarkable dataset of hourly climate observations of temperature, RH, precipitation, opaque cloud cover and snow depth from 13 climate stations across the Canadian Prairies...

This week GS Alex Robel will discuss Roe & Baker (2014), and he summarizes the attached paper as the following: There has been focus recently on the length changes of mountain glaciers around the world. In this week's ClimaTea, we will discuss work by Roe...

GS Leah Birch will be presenting the attached two papers, and her summary is below: Clouds have a two-fold effect in the atmosphere, as they promote both cooling and heating. Due to their size, they are often a great source of uncertainty in GCMs, so it...

Speaker: Dr. Ryan Abernathey (LDEO, Columbia University) Abstract: Mesoscale eddy fluxes play an important role in ocean transport. Coarse resolution climate models parameterize these fluxes in terms of diffusion coefficients, and improving such...

Speaker: Aditi Sheshadri (MIT) Abstract: The seasonal variability of the polar stratospheric vortex is studied in a simplified AGCM driven by specified equilibrium temperature distributions. Seasonal variations in equilibrium temperature are imposed in...

This week GS Chris Horvat is going to lead the discussion and explore how modern GCMs simulate sea ice, and two ways modelers have been led into traps while modeling it. First, Moon and Wettlaufer (2014) (attached) explore modeling of growth and decay in...

GS Karen McKinnon will be presenting Miralles et al. (2014), "Mega-heatwave temperatures due to combined soil desiccation and atmospheric heat accumulation." Miralles and co-authors present case studies of the large heat waves in Europe in 2003 and Russia...