Summer Colloquium

Summer Colloquium

ASP Summer Colloquium
Synthesis of Observations and Models in Studies of Shallow and Deep Clouds

June 4-15, 2018
National Center for Atmospheric Research, Boulder, Colorado U.S.A.


Chair: Jeff Stith
Organizers: Chris Bretherton (University of Washington), Chris Davis (NCAR), Bart Geerts (University of Wyoming), Andrew Gettelman (NCAR), Vanda Grubisic (NCAR), Rebecca Haacker (NCAR), Jorgen Jensen (NCAR), Greg McFarquhar (University of Oklahoma), James Moore (NCAR), Hugh Morrison (NCAR), Robert Rauber (University of Illinois), Valerie Sloan (NCAR)


Every year, the Advanced Study Program hosts a summer colloquium designed for graduate students on subjects that represent new or rapidly developing areas of research for which good course material may not yet be available. The colloquium brings together lecturers and graduate students to NCAR and generally includes about 25 student participants, and several lecturers from NCAR and the community at large.

Picture of the 2017 ASP colloquium cohort


Cloud processes, such as precipitation formation, are among the most challenging research frontiers aimed at improving weather and climate predictions, as they must cover a variety of time and space scales for different cloud types.  This colloquium is intended to introduce students to this frontier by exposing them to examples of current state of the art models aimed at different scales of simulation, together with recent field research that is targeted at improving the representation of cloud processes in these models. This colloquium is intended for advanced graduate students or, in some cases post-docs, whose interests may include cloud and aerosol physics, radar meteorology, and numerical simulation. It will feature lectures from experts on: Airborne and ground based measurements (both in situ and remote), field campaign data collection and project/data management, characteristics of numerical models at various scales, and recent research results using models and observations. Students will examine data from recent field campaigns (see below), together with corresponding numerical model output, under the mentorship of experts in model development and observational research. Numerical model output from both small scale and global models (the System for Atmospheric Modeling for large eddy simulation, the Weather Research and Forecasting model, and the Community Earth System Model) will be provided for students to compare to observations. The purpose is to explore analysis of cloud observations, as well as evaluation of model cloud schemes with observations. 


Field campaign logo for PLOWSThe Profiling of Winter Storms (PLOWS) field program is focused on obtaining a greater understanding of the mesoscale structure and dynamics of cyclonic weather systems and the improvement of 0-48 hr cool season quantitative precipitation forecasts. Variability in the location, type, and intensity of precipitation is often determined by precipitation banding and/or embedded convection, particularly in the northwest and warm frontal quadrant in cyclones where frontal structures and associated frontal circulations are modified by deformation flow.


Field campaign logo for PECANThe PECAN (Plains Elevated Convection at Night) campaign was envisioned as a multi-agency project (NSF, NOAA, NASA, DOE) designed to advance the understanding of continental, nocturnal, warm-season precipitation. PECAN was focused on nocturnal convection in conditions over the Southern Great Plains with a stable boundary layer (SBL), a nocturnal low-level jet (NLLJ) and the largest CAPE (Convectively Available Potential Energy) located above the SBL. Thunderstorms are most common after sunset across this region in summer and much of the resulting precipitation falls from mesoscale convective systems (MCSs). Nocturnal MCSs may produce heavy rainfall; their intensity is correlated with the NLLJ. To date, an accurate prediction and an in-depth understanding of elevated convection in this environment remains an elusive goal.


Field campaign logo for CSETThe Cloud Systems Evolution in the Trades (CSET) study was designed to describe and explain the evolution of the boundary layer aerosol, cloud, and thermodynamic structures along trajectories within the north-Pacific trade-winds using the NSF/NCAR Gulfstream V (HIAPER). This effort included characterization of the cloud, precipitation and aerosol fields in the stratocumulus and the fair-weather cumulus regimes within the subtropical easterlies over the northern Pacific. 


Expected Outcome:

Classroom during the colloquium

Colloquium attendees will observe examples of how leading scientists are using models and observations to do their research. Students will have an opportunity to examine observational and model output from recent research projects together with mentors, to better understand the uses and limitations of both numerical simulations and field measurements.

This colloquium will be held at the National Center for Atmospheric Research in Boulder, CO, USA. In addition to receiving excellent scientific training, participants will have the opportunity to explore the National Center, will receive guidance on career planning and professional development, and- if time allows- will have access to additional seminars and activities at the Center.





The NCAR Advanced Study Program will fund travel and living expenses for ~25 participants during the colloquium.  The ASP strives to have diverse representation of universities and student backgrounds at the colloquium; women and students from diverse background are encouraged to apply.

You will need a few things to complete the application.
1. a copy of your cv preferably in PDF format.
2. recommendation letter from your thesis adviser.
3. recommendation letter from someone other than your thesis adviser.
4. answer a couple of short questions. 
5. be willing to accept an image release and an excursion release.
6. affirm that you will be 18 years or older on June 1st , 2018.

You can upload your recommendation letters to the system, however, if your letter writers would prefer to send the letters directly to us, please have them send it to

You can complete the application here,

Deadline for applications is 28 February 2018

If you have questions about this colloquium please contact the ASP office at