56 Hits in 9.7 sec

Linking Regional Winter Sea Ice Thickness and Surface Roughness to Spring Melt Pond Fraction on Landfast Arctic Sea Ice

Sasha Nasonova, Randall Scharien, Christian Haas, Stephen Howell
2017 Remote Sensing  
This study quantifies the relationships of spring melt pond fraction (f p ) with both winter sea ice roughness and thickness, for landfast first-year sea ice (FYI) and multiyear sea ice (MYI).  ...  Statistics of winter sea ice thickness and roughness were compared to spring f p using three data aggregation approaches, termed object and hybrid-object (based on image segments), and regularly spaced  ...  Christian Haas provided thickness and roughness data for the analysis as well expert interpretation and support.  ... 
doi:10.3390/rs10010037 fatcat:62nqyhlza5ei3ndi2orektwqhm

Erratum: Nasonova, S. et al. Linking Regional Winter Sea Ice Thickness and Surface Roughness to Spring Melt Pond Fraction on Landfast Arctic Sea Ice. Remote Sens. 2018, 10, 37

Sasha Nasonova, Randall Scharien, Christian Haas, Stephen Howell
2018 Remote Sensing  
Scatter plots of fp as a function of mean thickness at the medium scale using object (left), hybrid object (middle) and 240 m grid-cell (right) aggregation approaches.  ...  Scatter plots of f p as a function of mean thickness at the medium scale using object (left), hybrid object (middle) and 240 m grid-cell (right) aggregation approaches.  ...  In Figure The blue points correspond to first-year ice (FYI) and red points to multiyear (MYI); however, a typo was made in the legends.  ... 
doi:10.3390/rs10050774 fatcat:hpwmk6yzdfhuzcd3labsgvpocy

Winter Sentinel-1 Backscatter as a Predictor of Spring Arctic Sea Ice Melt Pond Fraction

Randall K. Scharien, Rebecca Segal, Sasha Nasonova, Vishnu Nandan, Stephen E. L. Howell, Christian Haas
2017 Geophysical Research Letters  
Recent studies have shown a link between the amount of surface meltwater flooding that occurs on sea ice in the spring, termed melt pond fraction, and the extent of sea ice that remains at the end of summer  ...  Spring melt pond fraction (f p ) has been shown to influence September sea ice extent and, with a growing need to improve melt pond physics in climate and forecast models, observations at large spatial  ...  Response Network (MEOPAR), and the Changing Earth Science Network, part of the European Space Agency's Support To Science Element (STSE).  ... 
doi:10.1002/2017gl075547 fatcat:objhuuotafgu5lf66jfcki7kga

The Best of Both Worlds: Connecting Remote Sensing and Arctic Communities for Safe Sea Ice Travel

Rebecca A. Segal, Randall K. Scharien, Frank Duerden, Chui-Ling Tam
2021 Arctic  
on sea ice, sea ice encountered by boats, and ice discontinuities.  ...  Information from technology is desired to complement Inuit knowledge-based understanding of sea ice features, including surface roughness, thin sea ice, early and late season conditions, slush and water  ...  We thank the hunters and elders who shared wisdom during interviews and sea ice excursions, Jessica MacLean for assistance with interview transcription, Trilby Buck for support in the field, as well as  ... 
doi:10.14430/arctic71896 fatcat:hhdwbc6jjnhtbmziapdodvdidi

Spring melt pond fraction in the Canadian Arctic Archipelago predicted from RADARSAT-2

Stephen E. L. Howell, Randall K. Scharien, Jack Landy, Mike Brady
2020 The Cryosphere  
Melt ponds form on the surface of Arctic sea ice during spring, influencing how much solar radiation is absorbed into the sea ice–ocean system, which in turn impacts the ablation of sea ice during the  ...  Here, we use RADARSAT-2 imagery to predict and analyze peak melt pond fraction (fpk) and evaluate its utility to provide predictive information with respect to sea ice area during the melt season within  ...  Surface melt ponds, which form on sea ice during the spring, play an important role in the decay of sea ice and seasonal reduction in ice extent because they influence how much solar radiation is absorbed  ... 
doi:10.5194/tc-14-4675-2020 fatcat:xj3dwh2vg5h5fenhamf4reenyq

Average cosine coefficient and spectral distribution of the light field under sea ice: Implications for primary production

L. C. Matthes, J. K. Ehn, S. L.-Girard, N. M. Pogorzelec, M. Babin, C. J. Mundy
2019 Elementa: Science of the Anthropocene  
Arctic under-ice phytoplankton blooms are initiated by a sudden increase in the transmission of photosynthetically active radiation (PAR; 400 -700 nm) as a result of the formation of surface melt ponds  ...  In this thesis, the impact of spatiotemporal variability in transmitted irradiance on under-ice light field parameters is examined and later applied to produce the first estimate of late spring production  ...  through landfast sea ice with different surface types in 2015 (thick snow) and 2016 (thin snow, white ice, melt pond).  ... 
doi:10.1525/elementa.363 fatcat:ahma3lovkjcrzcaxoxf63is6ga

Linking winter and spring thermodynamic sea-ice states at critical scales using an object-based image analysis of Sentinel-1

RK Scharien, R Segal, JJ Yackel, SEL Howell, S Nasonova
2017 Annals of Glaciology  
Sea-ice melt pond fraction fp has been shown to be correlated with the September minimum ice extent due to its impact on ice albedo and heat uptake.  ...  An object-based image analysis links the winter and spring thermodynamic states of first-year and multiyear sea-ice types.  ...  In spring, the melting Arctic sea-ice cover is characterized by the formation of surface melt ponds.  ... 
doi:10.1017/aog.2017.43 fatcat:gz2ea4dpjrfmvpone6itvq2eem

Albedo feedback enhanced by smoother Arctic sea ice

Jack C. Landy, Jens K. Ehn, David G. Barber
2015 Geophysical Research Letters  
Observations from a field program in the Canadian Arctic show that minor variations in the roughness of pre-melt sea ice topography can affect significant variations in the melt pond coverage at the ice  ...  Terrestrial and satellite LiDAR observations are acquired and combined in a further study to examine how sea ice surface topography regulates the melting of ice during the Arctic summer.  ...  We could then estimate the melt pond fraction on sea ice during the Arctic summer by applying the model to satellite observations of winter sea ice roughness from ICESat.  ... 
doi:10.1002/2015gl066712 fatcat:ogmw7vzcobcdxlssrhs2hdvkgm

Toward an integrated coastal sea-ice observatory: System components and a case study at Barrow, Alaska

Matthew L. Druckenmiller, Hajo Eicken, Mark A. Johnson, Daniel J. Pringle, Christina C. Williams
2009 Cold Regions Science and Technology  
We examine two significant landfast ice breakout events off Barrow in spring of 2007.  ...  provides temperature profiles and thickness information for ice and snow; (4) sea-level measurements; (5) periodic ice thickness surveys using direct drilling and electromagnetic induction sounding; and  ...  Special thanks to the Barrow Arctic Science Consortium, Barrow Whaling Captains Association, Joe Leavitt, Arnold Brower, Sr., J.  ... 
doi:10.1016/j.coldregions.2008.12.003 fatcat:vexoto5c2bd5rpcybnecrbipsy

Snow dunes: A controlling factor of melt pond distribution on Arctic sea ice

Chris Petrich, Hajo Eicken, Christopher M. Polashenski, Matthew Sturm, Jeremy P. Harbeck, Donald K. Perovich, David C. Finnegan
2012 Journal of Geophysical Research  
The location of snow dunes over the course of the ice-growth season 2007/08 was mapped on level landfast first-year sea ice near Barrow, Alaska.  ...  The resulting preferential surface ablation of ponded ice creates the surface topography that later determines the melt pond evolution.  ...  Magnaprobe snow depth measurements on 1 May 2008 and some thickness measurements for Figure 6 were performed by volunteers of Ben and Jerry's Climate Change College.  ... 
doi:10.1029/2012jc008192 fatcat:xyln7v37qndszj5ztvmum7k65i

First-year sea ice melt pond fraction estimation from dual-polarisation C-band SAR – Part 1: In situ observations

R. K. Scharien, J. Landy, D. G. Barber
2014 The Cryosphere  
A field campaign was conducted in a region of level first-year sea ice (FYI) in the central Canadian Arctic Archipelago (CAA), during the summer of 2012, to examine the potential for estimating melt pond  ...  Surface roughness statistics of ice and ponds are characterised and compared to the validity domains of the Bragg and integral equation model (IEM) scattering models.  ...  This paper is dedicated to our colleague Dr.  ... 
doi:10.5194/tc-8-2147-2014 fatcat:zxaeccd5szerrdbjo63heiqjz4

A Multi-Sensor and Modeling Approach for Mapping Light Under Sea Ice During the Ice-Growth Season

Julienne Stroeve, Martin Vancoppenolle, Gaelle Veyssiere, Marion Lebrun, Giulia Castellani, Marcel Babin, Michael Karcher, Jack Landy, Glen E. Liston, Jeremy Wilkinson
2021 Frontiers in Marine Science  
Arctic sea ice is shifting from a year-round to a seasonal sea ice cover.  ...  This substantial transformation, via a reduction in Arctic sea ice extent and a thinning of its thickness, influences the amount of light entering the upper ocean.  ...  JS and GL were also funded under NASA NNX16AK85G. JL was funded under NERC Diatom-ARCTIC (NE/R012849/1). JS was also partially funded under the Canada 150 Chair Program and NASA Grant 80NSSC20K1121.  ... 
doi:10.3389/fmars.2020.592337 fatcat:siewht5olvhqfj4q755ykdrqmi

The Changing Climate of the Arctic

D. G. Barber, J. V. Lukovich, J. Keogak, S. Baryluk, L. Fortier, G.H.R. Henry
2009 Arctic  
Key words: Arctic climate change, marine science, sea ice, atmosphere, marine and terrestrial ecosystems RÉSUMÉ.  ...  circulation, also known as thermohaline circulation, as well as a continued decline in sea-ice extent and thickness, which influences communication between oceanic and atmospheric processes.  ...  ACKNOWLEDGEMENTS We thank members of the Inuvialuit community and the Inuit Tapiriit Kanatami (ITK) organization for their contributions and input. Thanks also to D.  ... 
doi:10.14430/arctic98 fatcat:5twdgcxdt5ecjcfdkecvtjf5la

Observations of sea ice melt from Operation IceBridge imagery

Nicholas C. Wright, Chris M. Polashenski, Scott T. McMichael, Ross A. Beyer
2020 The Cryosphere  
The summer albedo of Arctic sea ice is heavily dependent on the fraction and color of melt ponds that form on the ice surface.  ...  The derived OIB data presented here will be key to explore the behavior of melt pond formation Arctic sea ice.  ...  The authors would like to thank the two anonymous reviewers, the community members, and the handling editor for their suggestions which helped improve this publication. Financial support.  ... 
doi:10.5194/tc-14-3523-2020 fatcat:k4z5b3fp3nexhb5nia3776rs6q

Advances in understanding and parameterization of small-scale physical processes in the marine Arctic climate system: a review

T. Vihma, R. Pirazzini, I. Fer, I. A. Renfrew, J. Sedlar, M. Tjernström, C. Lüpkes, T. Nygård, D. Notz, J. Weiss, D. Marsan, B. Cheng (+4 others)
2014 Atmospheric Chemistry and Physics  
Further improvements in parameterization require new year-round field campaigns on the Arctic sea ice, closely combined with satellite remote sensing studies and numerical model experiments.</p>  ...  In sea ice and its snow cover, advances have been made in understanding of the surface albedo and its relationships with snow properties, the internal structure of sea ice, the heat and salt transfer in  ...  Irina Gorodetskaya and two anonymous reviewers are acknowledged for their constructive comments.  ... 
doi:10.5194/acp-14-9403-2014 fatcat:bxmubuchrvaujgwuvokliga4y4
« Previous Showing results 1 — 15 out of 56 results