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Temporal and spatial characteristics of Greenland ice sheet net snow accumulation (1781–2008)

Jung, Jihoon
http://rave.ohiolink.edu/etdc/view?acc_num=osu1343848275

Abstract Details

2012, Master of Arts, Ohio State University, Geography.
Snow and ice mass balance is an important concept to describe the growth or decay of land ice. Mass balance is measured as the difference between the amount of accumulation and the amount of ablation. In that this value could provide the significant information on the sea level rise and the global warming trend, many researchers have been trying to estimate or predict the input to the mass balance from net snow accumulation rates. However, predicting accumulation is not simple because this value varies with time and place. In this study, spatial and temporal characteristics are thus investigated to provide basic information on accumulation. The result represents that the ice cores in central-west and south-east basins are the most influential in total average accumulation over Greenland because of their large magnitude of accumulation. However, when the accumulation data are normalized, other sites (Tunu-N, ACT-04-2, and ACT-04-3) also appear to be important for total ice sheet accumulation. 5-year triangular filter has been adapted to find the correlations between ice cores. Central basins represent the large improvement and the northwest, northeast and southwest basins represent low improvement. The trend of increased signal to noise ratio may be related to the latitude. The correlations between most ice cores decay with distance. Especially, central-east and central-west basins show the strong distance-decay patterns. South east basin also represents relatively high distance decays. Otherwise, north and southwest basins do not represent high distance decay trend consistently. While southwest and southeast basins are located in almost same latitude, these two basins represent different trend regarding correlation and slope. This might be related to the prevailing easterly winds, frequent cyclogenesis, and orographic enhancement. High amount of accumulation in southeast basin might be also related. Over the whole period, temporal autocorrelation was not found in almost every basin, which means one year’s accumulation does not affect the next or last year’s one. Among various topographic or geographic factors, latitude is the most related factor for determining accumulation rates of all ice cores. In case of north and central basins, most topographic factors (Latitude, longitude, elevation, slope, aspect) are highly related to accumulation. Otherwise, southeast and southwest basins exhibit small relations with topographic factors. There is a relationship between NAO and accumulation in central west basin, but magnitude is not large.
Jason Box (Advisor)
Jialin Lin (Committee Member)
Desheng Liu (Committee Member)
Climate Change
Greenland; Accumulation; temporal; spatial

Recommended Citations

Citations

  • Jung, J. (2012). Temporal and spatial characteristics of Greenland ice sheet net snow accumulation (1781–2008) [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1343848275

    APA Style (7th edition)

  • Jung, Jihoon. Temporal and spatial characteristics of Greenland ice sheet net snow accumulation (1781–2008). 2012. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1343848275.

    MLA Style (8th edition)

  • Jung, Jihoon. "Temporal and spatial characteristics of Greenland ice sheet net snow accumulation (1781–2008)." Master's thesis, Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1343848275

    Chicago Manual of Style (17th edition)

osu1343848275
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© 2012, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.