Dr. Schweiger is the current chair of PSC. His research focuses on the interaction of sea ice with clouds and radiation. He is using satellite data, models and in-situ observations to improve our understanding of sea ice and cloud variability. He has developed the PSC Arctic Ice Volume Page . He has been working to improve estimates of the surface radiation balance in the Arctic. To this end he has been developing and evaluating satellite-based algorithms. He has been assembling the TOVS Polar Pathfinder data set, a 20-year data set of polar temperature, humidity profiles and cloud information. Previous research includes work on microwave-based sea ice concentration algorithms and the application of artificial intelligence methods to remote sensing problems. Dr. Schweiger has been with the Polar Science Center since 1992.
In The News
A new modeling study conducted by Dr. Jinlun Zhang to be published in the Journal of Climate shows that stronger polar winds lead to an increase in Antarctic sea ice, even in a warming climate.read more »
Increasing summer ice melt in the Arctic Ocean could shift global weather patterns and make polar waters more navigable. But scientists say forecasting Arctic ice and weather remains a massive challenge. The prospect of more ice-free water during Arctic Ocean summers has triggered efforts to improve ice and weather forecasts at the top of the worldread more »
As sea ice disappears in the Arctic Ocean, the U.S. Coast Guard is teaming with scientists to explore this new frontier by deploying scientific equipment through cracks in the ice from airplanes hundreds of feet in the air.read more »
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Clouds play a major role in the arctic surface energy balance controlling the growth and melt of sea ice. At the same time the processes involved in the formation, maintenance and dissipation of cloud cover over the Arctic Ocean are thought to be strongly influenced by the sea ice itself. This project will advance the understanding of this interaction and feedback by asking: What is the response of Arctic clouds to diminishing sea ice?read more »
This project will produce authoritative SAT data sets covering the Arctic Ocean from 1901 to present, which will be used to better understand Arctic climate change.read more »
The purpose of this project is to improve satellite retrievals of atmospheric temperature, humidity and clouds. Retrievals are based on the physical-statistical retrieval method of Chedin et al. (1985, Improved Iteration Inversion Algorithm, 3I). The method has been improved for use in sea ice-covered areas (Francis 1994) and the data set has been designed to address the particular needs of the Polar research community. The data set represents the so called Path-P as designated by the TOVS Science Working Group.read more »
Zhang, J., R. Lindsay, A. Schweiger, and M. Steele (2013), The impact of an intense summer cyclone on 2012 Arctic sea ice retreat, Geophys. Res. Lett, doi: 10.1002/grl.50190 (accepted manuscript)
Zhang, J., R. Lindsay, A. Schweiger, and I. Rigor, 2012: Recent changes in the dynamic properties of declining Arctic sea ice: A model study. Geophys. Res. Lett., 39, 20, doi:10.1029/2012GL053545.
Zhang, J.L., M. Steele, and A. Schweiger, “Arctic sea ice response to atmospheric forcings with varying levels of anthropogenic warming and climate variability“, Geophys. Res. Lett, 37, L20505, doi: 10.1029/2010gl044988, 2010.
Vavrus, S., D. Waliser, A. Schweiger, and J. Francis, “Simulations of 20th and 21st century Arctic cloud amount in the global climate models assessed in the IPCC AR4″, Clim Dynam, 33, 1099-1115, 2009.
Lindsay, R.W., J. Zhang, A. Schweiger, M.A. Steele and H. Stern, “Arctic Sea Ice Retreat in 2007 Follows Thinning Trend”, J. Clim., 22, 165-176, doi: 10.1175/2008JCLI2521., 2009.
Zhang J., M. Steele, R. Lindsay, A. Schweiger, J. Morison, “Ensemble 1-Year predictions of Arctic sea ice for the spring and summer of 2008″, Journal of Polar Science,submitted 2008.
Zhang, J, R.W Lindsay, M. Steele and A. Schweiger, “What Drove the Dramatic Retreat of Arctic Sea Ice During Summer 2007?”, Geophys. Res. Lett., doi:10.1029/2008GL034005.
Schweiger, A.J. , J. Zhang, R.W. Lindsay and M. Steele,’ Did unusually sunny skies help drive the sea ice anomaly of 2007′, Geophysical Research Letters, Vol. 35, L10503, doi:10.1029/2008GL033463, 2008.
Schweiger, A.J., Lindsay, R.W., Vavrus, S., Francis, J.A., “Relationships between Arctic Sea Ice and Clouds during Autumn”, Journal of Climate, doi: 10.1175/2008JCLI2156.1, 2008a.
Lindsay, R.W., J. Zhang, A. Schweiger and M.A. Steele, “Seasonal predictions of ice extent in the Arctic Ocean”, J. Geophys. Res., 113(C2), 2008.
Schweiger, A.J., J. Zhang, R.W. Lindsay, and M. Steele, “Did unusually sunny skies help drive the record sea ice minimum of 2007?”, Geophys. Res. Lett, 35, 10, 6, doi: L10503,10.1029/2008gl033463, 2008b.
Perovich D.K., S.V. Nghiem, T. Markus, A. Schweiger, “Seasonal evolution and interannual variability of the local solar energy absorbed by the Arctic sea ice-ocean system”, J. Geophys. Res.-Oceans, 112 (C3): Art. No. C03005, 2007.
Liu, Y. H., J.R. Key, A. J. Schweiger and J. A Francis, “Characteristics of satellite-derived clear-sky atmospheric temperature inversion strength in the Arctic 1980-96″, J Climate, 19(19), 4902-4913, 2006.
Schweiger, A.J., “Changes in seasonal cloud cover over the Arctic seas from satellite and surface observations“, Geophys. Res. Lett., 31, 10.1029/2004GL020067, 2004.