澳洲地理作业代写 冰原重建

2020-04-09 00:03

冰原重建对研究冰原与气候、海洋的相互作用具有重要意义。通过研究过去冰原对变化的反应,我们可以进一步了解这些冰原在未来长期时间尺度上的反应和变化(Davies, 2018)。一个冰原可以被定义为“一块超过20000平方英里的冰川土地”(NSDIC, 2017),然而我们正在研究的南极冰原超过540万平方英里(NSDIC, 2017)。南极冰原由冰流组成,这些冰流是“内陆冰原的一部分,流经周围的冰迅速流动”(Bentley, 1987)。这些冰流对研究很重要,因为它们的行为和稳定性对南极洲冰盖的整体动态和质量平衡至关重要(Bennett, 2003)。一旦被确认,冰流可以作为对过去冰川行为的一种洞察,并允许对未来当代冰原对未来气候扰动的响应做出预测。(斯托克斯,2001)。已经进行的研究表明,在最后一次最大冰川时期(LGM),南极冰盖的范围为海平面升降贡献了14米(丹顿,2002)。然而,自LGM以来,南极洲冰盖已经消退,留下了大量的地貌特征。本报告的目的是研究南极洲周围的水下景观,并确定和研究由这些冰流形成的关键地貌特征及其形成的动态过程。更具体地说,本报告将着眼于阿蒙森海的松岛海槽(深坑)和通过南极洲冰原退缩形成的地区楔(GZW)。
澳洲地理作业代写 冰原重建
Ice sheet reconstructions are of significant importance when researching interactions of ice sheets with the climate and ocean. By examining how ice sheets have responded to changes in the past, we are able to further understand how these ice sheets will react and change over future long-term timescales (Davies, 2018). An ice sheet can be defined as ‘a mass of glacial land extending more than 20,000 square miles’ (NSDIC, 2017), however the Antarctic ice sheet that we are studying extends over 5.4 million square miles (NSDIC, 2017). The Antarctic ice sheet is comprised of ice streams that are “a part of an inland ice sheet that flows rapidly through the surrounding ice” (Bentley, 1987). These ice streams are important to research as their behaviour and stability is essential to the overall dynamics of the Antarctica ice sheet and mass balance (Bennett, 2003). Once identified, ice streams can be used as an insight into past glacial behaviour and allow future prediction to be made of the response of contemporary ice sheets to future climate perturbations. (Stokes, 2001). Research has been undertaken to show that during the Last Glacial Maximum (LGM) the extent of the Antarctic ice sheet contributed 14m to the lowering of eustatic sea level (Denton, 2002). However, since the LGM, the Antarctica ice sheet has retreated, leaving a large range of geomorphological features uncovered. The aim of this report is to examine the submerged landscape surrounding the Antarctica and identify and examine the key geomorphological features formed by these ice streams and the dynamic processes that formed them. More specifically, this report will look at the Pine Island Trough (PIT) in the Amundsen Sea and the Ground-Zone Wedges (GZW) that were formed through the retreat of the Antarctica ice sheet.
本段内容来自网络 并不是我们的写手作品 请勿直接剽窃,查重100%,造成后果与本站无关。如需定制论文请记得联系我们。
  • 上一篇:没有了
  • 下一篇:没有了