First row, left to right: Isla Simpson, Joanie Kleypas, Cecile Hannay, Peter Lawrence, Joe Tribbia, Will Wieder; Back row, left to right: Jeff Kiehl, Marika Holland, Britt Stephens, Nan Rosenbloom, Claudia Tebaldi.

Launched 2016 | National Center for Atmospheric Research, Boulder, Colorado

A group of NCAR climate scientists with a range of disciplinary expertise met as a Council on November 17-18, 2016. Joanie Kleypas convened the group, with Jeff Kiehl and Sarah Buie (facilitator) providing counsel.


Jeff Kiehl, climate scientist and psychologist

Jeffrey T. Kiehl is a senior scientist at NCAR, where he heads the Climate Change Research Section. Over the past 30 years he has carried out research on a wide range of scientific questions regarding anthropogenic climate change. He has published over one hundred articles on topics including the effects of greenhouse gases on Earth’s climate, the effects of stratospheric ozone depletion on climate, and the effects of aerosols on the climate system. His most recent research is on Earth’s deep past climates and what they can tell us about future climate change.


Marika Holland, oceanographer / climate scientist

Marika Holland is a senior scientist in the Oceanography Section of NCAR. Her research interests are related to the role of sea ice and polar regions in the climate system, including ice/ocean/atmosphere feedback mechanisms, high latitude climate variability, and abrupt climate change. She is also interested in coupled climate modeling and the improvement of sea ice models for climate simulations.


Britt Stephens, climate scientist

Britton Stephens is a scientist in the Earth Observing Laboratory (EOL) at NCAR. His research focuses on developing and deploying new instruments for tower, ship, and aircraft-based observations of atmospheric O2 and CO2, and on synthesizing data sets and models to elucidate global carbon cycle processes.  Britt’s carbon-cycle interests span terrestrial ecology, oceanography, atmospheric dynamics, and climate change mitigation.


Nan Rosenbloom, climate scientist

Nan Rosenbloom is a member of the Climate Change and Prediction group within the Climate Change Research (CCR) section of NCAR. She supports simulations, looks at the effects of regionally forced ocean temperatures on climate variability and global climate change, and is liaison for climate model simulations of the Deep Past.


Claudia Tebaldi, statistician and research scientist

Claudia Tebaldi is a project scientist and climate statistician in the Climate and Global Dynamics Laboratory at NCAR, with research interests in the analysis of observations and climate model output in order to characterize observed and projected climatic changes and their uncertainties.


Isla Simpson, climate scientist

Isla Simpson is a scientist in the Climate Analysis Section of the Climate and Global Dynamics Division of NCAR, studying large-scale atmospheric dynamics and their representation in Global Climate Models.


Joanie Kleypas, marine ecologist and geologist

Joanie Kleypas is a scientist in the Oceanography Section of NCAR. As a marine ecologist/geologist, she focuses on how coral reefs and other marine ecosystems are affected by changes in the Earth’s atmosphere and climate, including global warming and ocean acidification. Her research includes efforts to conserve coral reefs and other marine ecosystems. She is also a member of the National UHF Council; for further information, see her bio above.


Cecile Hannay, climate scientist and modeler

Cecile Hannay is an associate scientist in the Atmospheric Modeling and Predictability Section within the Climate and Global Dynamics Division at NCAR. Her research interests include clouds, their impact on climate and their representation in climate models. models.


Peter Lawrence, geographer and climate scientist

Peter Lawrence is a Project Scientist in the Climate & Global Dynamics Division at NCAR. His research focuses on how the biosphere, land surface hydrology, and human modified landscapes interact with the climate system, to impact regional and global climate. He is interested in predicting and managing the impacts of climate change and climate variability on human populations, and the agricultural and natural systems that support them.


Joe Tribbia, climate scientist and modeler

Joseph J. Tribbia is a senior scientist at the National Center for Atmospheric Research (NCAR) and Head of its Atmospheric Modeling and Predictability Section in the Climate and Global Dynamics Division. His work focuses on the numerical simulation of the atmosphere and geo-physically relevant flows.


Will Wieder, climate scientist and ecologist

Will Wieder is a member of the Climate and Global Dynamics Laboratory at NCAR. With training as an experimental soil biogeochemist, he is interested in evaluating and improving Earth System models by incorporating ecological theory and observations.

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