Welcome to Climate Analysis

CAS Research

The mission of the Climate Analysis Section is to increase the understanding of the atmosphere and climate system through empirical studies and diagnostic analyses of the atmosphere and its interactions with the Earth's surface and oceans on a wide range of scales with a particular goal of contributing to the building of a climate information system.

Emphasis of research is on the atmospheric and oceanic general circulations, meteorological phenomena such as tropical cyclones, global warming, the hydrological cycle, and climate variations over several time scales. Research has focused on interannual variations, such as the El Nino-Southern Oscillation and the North Atlantic Oscillation phenomena; decadal variations, such as the Pacific Decadal Oscillation; and longer-period trends, and their climate forcings. Attribution and mitigation of climate change are also topics of in-depth research.

For more information on the role of CAS in CGD, NESL, NCAR as well as nationally and internationally, see:.ppt or .pdf


Prince Sultan Bin Abdulaziz International Prize for Water, 2012 Surface Water Prize. The prize is awarded to Dr. Trenberth and his team, which includes Dr. Aiguo Dai, for ground-breaking work that provides a powerful estimate of the effects of climate change on the global hydrological cycle, with a clear explanation of the global water budget.

CAS announces the release of the new Climate Data Guide. The Guide is an interactive website that enables researchers and students to identify and make effective use of climate data sets by providing a focal point for expert-user guidance, commentary, and questions on the strengths and limitations of selected observational datasets and their applicability to model evaluations.

Recent Publications

Framing the way to relate climate extremes to climate change. Trenberth, K. E. 2012: Journal of Climate, 25, 4048-4066. [doi: 10.1007/s10584-012-0441-5.] The atmospheric and ocean environment has changed from human activities in ways that affect storms and extreme climate events. The main way climate change is perceived is through changes in extremes because those are outside the bounds of previous weather.

Observed Antarctic climate variability and tropical linkages. Schneider, D.P., Y. Okumura and C. Deser, 2012: Journal of Climate, 25, 4048-4066, doi:10.1175/JCLI-D-11-00273.1. This study reviews the mechanisms associated with Antarctic-tropical climate linkages and presents new analyses of the seasonality and spatial patterns of tropical climate signals in the Antarctic for the late 1950s to the present.

Climate extremes and climate change: The Russian heat wave and other climate extremes of 2010. Trenberth, K. E., and J. T. Fasullo, 2012: J. Geophys. Res., 117, D17103, doi:10.1029/2012JD018020. A global perspective is developed on a number of high impact climate extremes in 2010 through diagnostic studies of the anomalies, diabatic heating, and global energy and water cycles that demonstrate relationships among variables and across events.