Grand Science Challenge on Clouds, Circulation and Climate Sensitivity
Winter Semester 2014/2015
Thursdays 12:30-14:30 (short break)
Room 24, Bundesstrasse 53


Overview
This course (12+1 meetings broken into two 50 min sessions with a 15 minute break in between) will provide an in-depth exploration of the four basic research questions identified as key for understanding what climate change means for humans and society.

Grading
Credit for the course will be based on participation and and a short (2-3 page) paper motivating and outlining a specific research question that one would pursue to advance progress on one of the four questions. Participation will be measured by engagement in the discussion and degree of preparation before the lecture. Each 50 min lecture session will discuss one to two papers as listed below for specific lecture dates.

Lectures
30.10.2014 Overview and Introduction

06.11.2014: Storm Tracks (background)
Opens external link in current windowInfluence of the Gulf Stream on the troposphere
Opens external link in current windowThe Basic Ingredients of the North Atlantic Storm Track. Part I: Land-Sea Contrast and Orography
Opens external link in current windowNew perspectives on the Northern Hemisphere winter storm tracks
Opens external link in current windowA Regime View of the North Atlantic Oscillation and Its Response to Anthropogenic Forcing

27.11.2014: Storm Tracks
Opens external link in current windowThe Steady-State Atmospheric Circulation Response to Climate Change–like Thermal Forcings ...
Opens external link in current windowMidlatitude storms in a moister world: lessons from idealized baroclinic life cycle experiment
Opens external link in current windowA Diagnosis of the Seasonally and Longitudinally Varying Midlatitude Circulation Response to Global Warming
Opens external link in current windowChanging Northern Hemisphere storm tracks in an ensemble of IPCC climate change simulations

04.12.2014: Storm Tracks
Opens external link in current windowThe response of the Southern Hemispheric eddy-driven jet to future changes in shortwave radiation in CMIP5
Opens external link in current windowSouthern Hemisphere Cloud–Dynamics Biases in CMIP5 Models and Their Implications for Climate Projections
Opens external link in current windowLinks between Rossby Wave Breaking and the North Atlantic Oscillation–Arctic Oscillation in Present-Day and ...

18.12.2014: Rainbelts
Opens external link in current windowA satellite-derived climatology of the ITCZ
Opens external link in current windowThe global monsoon as seen through the divergent atmospheric circulation
Opens external link in current windowWhy the ITCZ is mostly north of the equator
Opens external link in current windowRobust Sahel drying in response to late 20th century forcings

15.01.2015: Rainbelts
Opens external link in current windowOn the Role of Sea Surface Temperature Gradients in Forcing Low-Level Winds and Convergence in the Tropics 
Opens external link in current windowMechanisms of Global Warming Impacts on Regional Tropical Precipitation
Opens external link in current windowThe Response of the ITCZ to Extratropical Thermal Forcing: Idealized Slab-Ocean Experiments with a GCM
Opens external link in current windowLink between the double-Intertropical Convergence Zone problem and cloud biases over the Southern Ocean

22.01.2015: Rainbelts
Opens external link in current windowRobust direct effect of carbon dioxide on tropical circulation and regional precipitation
Opens external link in current windowCirculation response to warming shaped by radiative changes of clouds and water vapor
Opens external link in current windowThe role of moist convection in the West African monsoon system: Insights from continental-scale ...
Opens external link in current windowEvaluation of modern and mid-Holocene seasonal precipitation of the Mediterranean and northern Africa in the CMIP5 ...

29.01.2015: Convection & Climate Sensitivity
Opens external link in current windowA Radiative-Convective Model Study of the CO2 Climate Problem
Initiates file downloadCarbon dioxide and climate: A scientific assessment
Opens external link in current windowAdjustments in the forcing-feedback framework for understanding climate change
Opens external link in current windowOn the interpretation of inter-model spread in CMIP5 climate sensitivity estimates

05.02.2015: Convection & Climate Sensitivity
Opens external link in current windowOn dynamic and thermodynamic components of cloud changes
Opens external link in current windowMarine Boundary Layer Cloud Feedbacks in a Constant Relative Humidity Atmosphere
Opens external link in current windowComputing and Partitioning Cloud Feedbacks Using Cloud Property Histograms. Part I: Cloud Radiative Kernels
Opens external link in current windowCoupling between subtropical cloud feedback and the local hydrological cycle in a climate model

Tuesday Feb 17 at 15:00: Convection & Climate Sensitivity
Opens external link in current windowAn Investigation of the Connections among Convection, Clouds, and Climate Sensitivity in a Global Climate Model
Opens external link in current windowSpread in model climate sensitivity traced to atmospheric convective mixing
Opens external link in current windowWeakening and strengthening structures in the Hadley Circulation change under global warming and implications ...
Opens external link in current windowMechanisms of marine low cloud sensitivity to idealized climate perturbations: A single-LES exploration extending ...

30.04.15: Is Convective Aggregation Important for Climate
Opens external link in current windowAn energy-balance analysis of deep convective self-aggregation above uniform SST
Opens external link in current windowObservational evidence for relationships between the degree of aggregation of deep convection, water vapor, ...
Opens external link in current windowCloud clusters and large-scale vertical motions in the tropics
Opens external link in current windowThermostats, radiator fins and the local runaway greenhouse

 

07.05.15: Is Convective Aggregation Important for Climate
Opens external link in current windowHeld, Hemler and Ramaswamay, 1992: Radiative-convective equilibrium with explicit two-dimensional moist convection
Opens external link in current windowMuller and Held, 2013: Detailed Investigation of the Self-Aggregation of Convection in Cloud-Resolving Simulations
Opens external link in current windowWing and Emanuel, 2014: Physical mechanisms controlling self‐aggregation of convection in idealized numerical...
Opens external link in current windowEmanuel, Wing and Vincent, 2014: Radiative convective instability

21.05.15: Is Convective Aggregation Important for Climate

Opens external link in current windowJeevanjee and Romps, 2013: Convective self-aggregation, cold pools, and domain size
Muller and Bony, 2015: What favors convective aggregation, and why?
Please contact Opens window for sending emailDörte de Graaf for receiving the paper
Opens external link in current windowMauritsen and Stevens, 2015: Missing iris effect as a possible cause of muted hydrological change and high...
Opens external link in current windowSeifert and Heus, 2013: Large-eddy simulation of organized precipitating trade wind cumulus clouds