Åsa Rennermalm

About

Åsa Rennermalm is a professor in the Department of Geography at Rutgers University. She holds a Ph.D. from Princeton University and is a core faculty member and graduate faculty at Rutgers. Her research interests include the hydrology and glaciology of the Arctic region, with a focus on how contemporary climate change is transforming the Greenland ice sheet. She is involved in teaching courses such as Earth Systems, Spatial Data Analysis, and Field Geography. As an academic, she contributes to understanding the impacts of climate change on polar ice and water systems, integrating her expertise in hydrology and glaciology to address pressing environmental issues.

Research topics

• Geomorphology
• Geology
• Physical geography
• Climatology
• Oceanography
• Environmental science
• Geography

Selected publications

• Increasing extreme melt in northeast Greenland linked to foehn winds and atmospheric rivers

  Nature Communications · 2023 · 62 citations

  percentile) melt occurs during foehn conditions and 50-75% during ARs. These events have become more frequent during the twenty-first century, with 5-10% of total northeast Greenland melt in several recent summers occurring during the ~1% of times with strong AR and foehn conditions. We conclude that the combined AR-foehn influence on northeast Greenland extreme melt will likely continue to grow as regional atmospheric moisture content increases with climate warming.

  PublisherOA PDFDOI

• Shallow firn cores 1989–2019 in southwest Greenland's percolation zone reveal decreasing density and ice layer thickness after 2012

  Journal of Glaciology · 2021 · 61 citations

  1st authorCorresponding

  Abstract Refreezing of meltwater in firn is a major component of Greenland ice-sheet's mass budget, but in situ observations are rare. Here, we compare the firn density and total ice layer thickness in the upper 15 m of 19 new and 27 previously published firn cores drilled at 15 locations in southwest Greenland (1850–2360 m a.s.l.) between 1989 and 2019. At all sites, ice layer thickness covaries with density over time and space. At the two sites with the earliest observations (1989 and 1998), b…

  PublisherOA PDFDOI

• Supraglacial River Forcing of Subglacial Water Storage and Diurnal Ice Sheet Motion

  Geophysical Research Letters · 2021 · 36 citations

  Abstract Surface melting impacts ice sheet sliding by supplying water to the bed, but subglacial processes driving ice accelerations are complex. We examine linkages between surface runoff, transient subglacial water storage, and short‐term ice motion from 168 consecutive hourly measurements of meltwater discharge (moulin input) and GPS‐derived ice surface motion for Rio Behar, a ∼60 km 2 moulin‐terminating supraglacial river catchment on the southwest Greenland Ice Sheet. Short‐term acceleratio…

  PublisherOA PDFDOI

• Heterogeneous CO ₂ and CH ₄ content of glacial meltwater from the Greenland Ice Sheet and implications for subglacial carbon processes

  ˜The œcryosphere · 2021-04-01 · 34 citations

  articleOpen access

  Abstract. Accelerated melting of the Greenland Ice Sheet has increased freshwater delivery to the Arctic Ocean and amplified the need to understand the impact of Greenland Ice Sheet meltwater on Arctic greenhouse gas budgets. We evaluate subglacial discharge from the Greenland Ice Sheet for carbon dioxide (CO2) and methane (CH4) concentrations and δ13C values and use geochemical models to evaluate subglacial CH4 and CO2 sources and sinks. We compare discharge from southwest (a sub-catchment of t…

  PublisherOA PDFDOI

• Spectral attenuation coefficients from measurements of light transmission in bare ice on the Greenland Ice Sheet

  ˜The œcryosphere · 2021-04-21 · 34 citations

  articleOpen access

  Abstract. Light transmission into bare glacial ice affects surface energy balance, biophotochemistry, and light detection and ranging (lidar) laser elevation measurements but has not previously been reported for the Greenland Ice Sheet. We present measurements of spectral transmittance at 350–900 nm in bare glacial ice collected at a field site in the western Greenland ablation zone (67.15∘ N, 50.02∘ W). Empirical irradiance attenuation coefficients at 350–750 nm are ∼ 0.9–8.0 m−1 for ice at 12–…

  PublisherOA PDFDOI

Frequent coauthors

• L. C. Smith

  Providence College

  98 shared

• Marco Tedesco

  Columbia University

  65 shared

• L. H. Pitcher

  Oak Ridge Institute for Science and Education

  47 shared

• V. W. Chu

  University of California, Santa Barbara

  44 shared

• M. G. Cooper

  Pacific Northwest National Laboratory

  40 shared

• S. Moustafa

  39 shared

• S. Z. Leidman

  Rutgers, The State University of New Jersey

  32 shared

• Thomas L. Mote

  University of Georgia

  28 shared

Labs

• Åsa Rennermalm LabPI

Education

• Ph.D., Geography

  University of Umeå

  1995

• M.S., Geography

  University of Umeå

  1991

• B.S., Geography

  University of Umeå

  1988

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