Article
Environmental Sciences
Zhenxiang Fang, Ninglian Wang, Yuwei Wu, Yujie Zhang
Summary: Accurate monitoring of surface temperature and melting on the Greenland Ice Sheet is crucial for understanding its mass balance and climate change. A study using MODIS data found that there is a strong correlation between surface temperature and mass balance of the ice sheet.
Article
Geosciences, Multidisciplinary
Raymond Sellevold, Miren Vizcaino
Summary: This study combines artificial neural networks with CESM2 and RCM simulations to establish relationships between global climate model output and Greenland ice sheet melt. The models estimate an increasing trend in Greenland ice sheet melt in the future, with climate model sensitivity being the primary source of uncertainty throughout the 21st century.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geography, Physical
Alia L. Khan, Peng Xian, Joshua P. Schwarz
Summary: This study investigates the role of black carbon (BC) in the seasonal evolution of ice-albedo feedbacks in the bare-ice zone of the Greenland Ice Sheet (GrIS). Analysis of surface samples collected during the 2014 summer melt season reveals that BC concentrations and size distributions in the weathering crust of the dark zone are actively regulated by climate seasonality and wildfire smoke. Further research is needed to understand the impact of BC on ice-albedo feedbacks in the bare-ice region of the GrIS.
Article
Environmental Studies
Xiaoge Yu, Tingting Wang, Minghu Ding, Yetang Wang, Weijun Sun, Qinglin Zhang, Baojuan Huai
Summary: Satellite data has advanced research in polar regions affected by global climate change, yet discussion around uncertainties and limitations of satellite-derived surface temperatures persists for Greenland. This study validates the accuracy of ice surface temperatures (IST) from MODIS over Greenland, highlighting a general underestimation of IST compared to observational data from AWSs. The MODIS IST demonstrated better accuracy in the northwest, northeast, and central regions of the Greenland ice sheet, with noticeable seasonal trends and positive anomalies in certain areas.
Article
Multidisciplinary Sciences
Michael Wood, Eric Rignot, Ian Fenty, Lu An, Anders Bjork, Michiel van den Broeke, Cilan Cai, Emily Kane, Dimitris Menemenlis, Romain Millan, Mathieu Morlighem, Jeremie Mouginot, Brice Noel, Bernd Scheuchl, Isabella Velicogna, Josh K. Willis, Hong Zhang
Summary: Research shows that the intrusion of warm Atlantic Waters has significantly influenced the retreat of 226 marine-terminating glaciers in Greenland, particularly those located in deep fjords. Excluding ocean-induced undercutting in ice sheet projections may underestimate mass loss by at least a factor of 2.
Article
Multidisciplinary Sciences
T. D. L. Irvine-Fynn, A. Edwards, I. T. Stevens, A. C. Mitchell, P. Bunting, J. E. Box, K. A. Cameron, J. M. Cook, K. Naegeli, S. M. E. Rassner, J. C. Ryan, M. Stibal, C. J. Williamson, A. Hubbard
Summary: This study quantifies microbial abundance and cellular biomass flux in the western sector of the Greenland Ice Sheet, revealing slow interstitial water flow but high cell transport to supraglacial streams per square meter. The research suggests that cellular carbon accumulation in the weathering crust exceeds fluvial export, providing significant flux to support heterotrophs and methanogenesis at the bed.
NATURE COMMUNICATIONS
(2021)
Article
Geography, Physical
Daniel Clarkson, Emma Eastoe, Amber Leeson
Summary: This study statistically analyzes the melt events of the Greenland ice sheet using a Gaussian mixture model, and finds that the melt probability and annual maximum temperatures have increased in significant portions of the ice sheet over the past two decades.
Article
Environmental Sciences
Lei Zheng, Lanjing Li, Zhuoqi Chen, Yong He, Linshan Mo, Dairong Chen, Qihan Hu, Liangwei Wang, Qi Liang, Xiao Cheng
Summary: Recent studies have found that meltwater in supraglacial lakes (SLs) on the Greenland Ice Sheet (GrIS) can be buried during the frozen season, providing a buffer against sea-level rise. However, there is limited knowledge about the inter-annual dynamics of buried lakes (BLs) in the GrIS. In this study, a satellite-based approach was used to map winter BLs over the GrIS from 2017 to 2022, and it was found that on average, 13% of the GrIS summer SLs persist through winter. BLs were mainly distributed in the Center-West, South-West, and North-East Basins, with significant extensions observed in certain areas due to abnormal weather conditions.
REMOTE SENSING OF ENVIRONMENT
(2023)
Article
Environmental Sciences
Andreas Colliander, Mohammad Mousavi, John S. Kimball, Julie Z. Miller, Mariko Burgin
Summary: Increasingly larger portions of the Greenland ice sheet are melting and refreezing seasonally due to global climate warming. Our study shows that multi-frequency passive microwave measurements effectively distinguish seasonal meltwater on the surface and deeper ice layers. The results indicate persistent seasonal subsurface meltwater occurrences that are concealed from high-frequency observations.
REMOTE SENSING OF ENVIRONMENT
(2023)
Article
Multidisciplinary Sciences
Nathan Maier, Florent Gimbert, Fabien Gillet-Chaulet
Summary: Basal motion plays a crucial role in ice speeds in Greenland, which is influenced by meltwater delivery to the ice base. Increasing melt rates enhance bed friction and cause the ice to slow down. However, factors besides melt rates primarily control the impact of melt forcing. The weakening of the southern ablation zone and the strengthening of the northern ablation zone suggest that dynamic changes leading to increased mass loss are likely to occur in northern Greenland as temperatures increase.
Article
Geography, Physical
Rohi Muthyala, Asa K. Rennermalm, Sasha Z. Leidman, Matthew G. Cooper, Sarah W. Cooley, Laurence C. Smith, Dirk van As
Summary: This study presents long-term discharge data for a supraglacial stream catchment in southwest Greenland, capturing diurnal and seasonal variability. Shortwave radiation is the primary driver of melting, but its contribution decreases during high-melt episodes, while longwave radiation, sensible heat fluxes, and latent heat fluxes become more important. The timing of daily maximum discharge changes, possibly due to the expansion and contraction of the stream network.
Article
Geography, Physical
Olivia Miller, Clifford Voss, D. Kip Solomon, Clement Miege, Richard Forster, Nicholas Schmerr, Lynn Montgomery
Summary: This article evaluates a conceptual model of a perennial firn aquifer near Helheim Glacier in southeast Greenland based on field observations and simulation of liquid water flow and energy transport. The results confirm that the model accurately represents the physical processes of groundwater flow, energy transport, and phase change. Factors such as surface temperature, meltwater recharge rate, and capillary fringe thickness are found to influence the configuration of the aquifer. The study suggests that a warming climate may lead to the expansion of the aquifer and potentially impact the surface energy balance.
JOURNAL OF GLACIOLOGY
(2023)
Letter
Geosciences, Multidisciplinary
N. Jullien, A. J. Tedstone, H. Machguth, N. B. Karlsson, V. Helm
Summary: We analyzed airborne accumulation radar data from 2002 to 2018 to investigate changes in the extent and thickness of ice slabs in Greenland. It was found that ice slabs several meters thick were already present before 2002. Between 2012 and 2018, the ice slabs expanded inland by 13,400-17,600 km(2), or 37%-44%. The study also demonstrated that the extremely warm summer of 2012 led to the formation of near-surface ice layers at higher elevations, enabling the development of ice slabs with only moderate melting in subsequent summers.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Geosciences, Multidisciplinary
A. M. Solgaard, D. Rapp, B. P. Y. Noel, C. S. Hvidberg
Summary: This study analyzed high-resolution ice velocity data of the Greenland Ice Sheet using a clustering algorithm and identified characteristic seasonal flow patterns. The results showed spatial and interannual variability in these flow patterns, which are linked to water availability at the base of the ice.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Helen Amanda Fricker, Philipp Arndt, Kelly M. Brunt, Rajashree Tri Datta, Zachary Fair, Michael F. Jasinski, Jonathan Kingslake, Lori A. Magruder, Mahsa Moussavi, Allen Pope, Julian J. Spergel, Jeremy D. Stoll, Bert Wouters
Summary: The surface melting on the Antarctic and Greenland ice sheets can now be quantified more accurately using NASA's ICESat-2 laser altimeter, which provides depth estimates for surface meltwater. This new capability helps improve image-based algorithms for depth estimation.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geosciences, Multidisciplinary
Jihyun Kim, Taehee Hwang, Crystal L. Schaaf, David A. Orwig, Emery Boose, J. William Munger
GEOPHYSICAL RESEARCH LETTERS
(2017)
Article
Remote Sensing
Michael J. Hill, Qiang Zhou, Qingsong Sun, Crystal B. Schaaf, Michael Palace
INTERNATIONAL JOURNAL OF REMOTE SENSING
(2017)
Article
Environmental Sciences
Samiah E. Moustafa, Asa K. Rennermalm, Miguel O. Roman, Zhuosen Wang, Crystal B. Schaaf, Laurence C. Smith, Lora S. Koenig, Angela Erb
REMOTE SENSING OF ENVIRONMENT
(2017)
Article
Environmental Sciences
Yan Liu, Zhuosen Wang, Qingsong Sun, Angela M. Erb, Zhan Li, Crystal B. Schaaf, Xiaoyang Zhang, Miguel O. Roman, Russell L. Scott, Quan Zhang, Kimberly A. Novick, M. Syndonia Bret-Harte, Shelley Petroy, Mike SanClements
REMOTE SENSING OF ENVIRONMENT
(2017)
Article
Environmental Sciences
Nima Pahlevan, John R. Schott, Bryan A. Franz, Giuseppe Zibordi, Brian Markham, Sean Bailey, Crystal B. Schaaf, Michael Ondrusek, Steven Greb, Christopher M. Strait
REMOTE SENSING OF ENVIRONMENT
(2017)
Article
Environmental Sciences
Xiaoyang Zhang, Jianmin Wang, Feng Gao, Yan Liu, Crystal Schaaf, Mark Friedl, Yunyue Yu, Senthilnath Jayavelu, Joshua Gray, Lingling Liu, Dong Yan, Geoffrey M. Henebry
REMOTE SENSING OF ENVIRONMENT
(2017)
Article
Agronomy
Stephen Klosterman, Eli Melaas, Jonathan A. Wang, Arturo Martinez, Sidni Frederick, John O'Keefe, David A. Orwig, Zhuosen Wang, Qingsong Sun, Crystal Schaaf, Mark Friedl, Andrew D. Richardson
AGRICULTURAL AND FOREST METEOROLOGY
(2018)
Article
Geochemistry & Geophysics
Terhikki Manninen, Aku Riihela, Andrew Heidinger, Crystal Schaaf, Alessio Lattanzio, Jeffrey Key
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2018)
Editorial Material
Biology
F. Mark Danson, Mathias I. Disney, Rachel Gaulton, Crystal Schaaf, Alan Strahler
Review
Biology
D. A. Orwig, P. Boucher, I. Paynter, E. Saenz, Z. Li, C. Schaaf
Article
Environmental Sciences
Ji Hyun Kim, Taehee Hwang, Yun Yang, Crystal L. Schaaf, Emery Boose, J. William Munger
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2018)
Article
Environmental Sciences
Peter Brehm Boucher, Steven Hancock, David A. Orwig, Laura Duncanson, John Armston, Hao Tang, Keith Krause, Bruce Cook, Ian Paynter, Zhan Li, Arthur Elmes, Crystal Schaaf
Article
Geography, Physical
John Faulkner Burkhart, Arve Kylling, Crystal B. Schaaf, Zhuosen Wang, Wiley Bogren, Rune Storvold, Stian Solbo, Christina A. Pedersen, Sebastian Gerland
Article
Environmental Sciences
Tong Jiao, Christopher A. Williams, Bardan Ghimire, Jeffrey Masek, Feng Gao, Crystal Schaaf
Article
Agronomy
Yan Liu, Michael J. Hill, Xiaoyang Zhang, Zhuosen Wang, Andrew D. Richardson, Koen Hufkens, Gianluca Filippa, Dennis D. Baldocchi, Siyan Ma, Joseph Verfaillie, Crystal B. Schaaf
AGRICULTURAL AND FOREST METEOROLOGY
(2017)