Albrecht Karle

Albrecht Karle is the IceCube Associate Director for Science and Instrumentation, the Principal Investigator for ARA, and a professor of physics at the University of Wisconsin–Madison. His research is focused on high-energy neutrino astronomy and astrophysics. With IceCube, he focuses on research with neutrinos of all flavors at energies above 30 TeV. He is also exploring new ways to detect ultra-high-energy neutrinos using radio detectors. Karle currently mentors several graduate students and postdocs in addition to serving as the department chair. He is accepting inquiries for gradate and undergraduate research positions. Karle’s complete CV is available to download.  


Select Publications

Evidence for Astrophysical Muon Neutrinos from the Northern Sky with IceCube
IceCube Collaboration: M. G. Aartsen et al
(Journal Article) Physical Review Letters 115 (2015) 081102; e-print archive arXiv:1507.04005 [astro-ph.HE] |

Searches for Extended and Point-like Neutrino Sources with Four Years of IceCube Data
IceCube Collaboration: M. G. Aartsen et al
(Journal Article) Astrophysical Journal 796 (2014) 109; e-print archive arXiv:1406.6757 [astro-ph.HE] |

Evidence for High-Energy Extraterrestrial Neutrinos at the IceCube Detector
IceCube Collaboration: M. G. Aartsen et al
(Journal Article) Science 342 (2013) 1242856, 22 November 2013; DOI: 10.1126/science.1242856 | |

Multiyear Search for a Diffuse Flux of Muon Neutrinos with AMANDA-II
IceCube Collaboration: A. Achterberg et al
(Journal Article) Physical Review D76 (2007) 042008, 31 August 2007; erratum ibid D77 (2008) 089904(E), 17 April 2008 | | |

Performance of two Askaryan Radio Array stations and first results in the search for ultra-high energy neutrinos
ARA Collaboration: P. Allison et al
(Journal Article) e-print archive arXiv: 1507.08991[astro-ph.HE], July 2015

Honors and Awards

    • American Physical Society Fellow
    • Fermilab URA Visiting Committee (2005–2008)
    • NSF South Pole users committee member (2000–2010)
    • Scientific Committee on Antarctic Research, SCAR (2007–present)


(608) 890-0542
University of Wisconsin–Madison
Department of Physics
4287 Chamberlin Hall
Madison, Wisconsin 53706
222 W Washington Ave
5th floor, room 5113
Madison, WI 53703

Faculty Profiles

WIPAC faculty and students are involved in IceCube, the Askaryan Radio Array (ARA), the High-Altitude Water Cherenkov (HAWC) experiment, Cherenkov Telescope Array (CTA), Big Data, and DM-Ice.


In keeping with our vision, we encourage and support visits from researchers who have interests, or who wish to develop interests, in several of our research areas.


The postdoctoral fellowship program was created to honor the late John Bahcall, a prominent physicist and a founding member of the IceCube experiment.  In 2015 the Balzan Fellowship was created after Francis Halzen was awarded the Balzan Prize.