Assistant Professor (Senior Research)firstname.lastname@example.org
Paleoclimate, ice cores, abrupt climate change, firn processes
My work aims to reconstruct and understand past climate change and atmospheric composition, using deep ice cores from Greenland and Antarctica. I combine ice core measurements, numerical modeling and fieldwork to achieve these goals.
I have an enduring interest in abrupt climate change of the last ice age, the so-called Dansgaard-Oeschger cycle. For each D-O event, Greenland warmed by about 10°C within decades. We discovered that during these events the hemispheres communicate via slow (200 year delayed!) oceanic signals
, as well as via fast atmospheric signals
. Using climate models I have investigated the role of the Southern Ocean in setting the pace
of the D-O cycle.
Ongoing work is to reconstruct the timing, magnitude and spatial pattern of climate change over the Greenland ice sheet using nitrogen isotopes
, and to understand how this relates to the rate of ice retreat
during the last deglaciation.
I have extensively studied the firn layer, which is the 50 to 100 m thick layer of unconsolidated snow on top of ice sheets. I work both on firn densification
and on firn air transport
Ice core timescales (or chronologies) are critical for the correct interpretation of ice core records. I continue to work on improving ice core chronologies through firn densification modeling and volcanic matching. I have contributed to ice core time scales of the NEEM
, WAIS Divide
, South Pole and RICE ice cores.
Other research projects include radiometric Kr-81 dating
of ancient ice in Antarctica, in situ radiocarbon production
in ice, and the relationship
between temperature and accumulation
in Antarctica. In a previous life, I worked on quantum dots