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Modeling the effect of Greenland on wintertime cyclones and energy transport in the North Atlantic Gateway to the Arctic.

机译:模拟格陵兰岛对北大西洋通往北极的冬季气旋和能量传输的影响。

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摘要

This thesis investigates the role of the Greenland ice sheet and sea ice cover on synoptic development and poleward energy transports to the Arctic via the "North Atlantic Gateway". Simulations were conducted using a regional numerical weather prediction model (Polar MM5). Control simulations for individual cyclones and for month long runs were compared to sensitivity runs with the topography of; Greenland removed and with different sea ice conditions. Greenland encourages secondary cyclone formation through lee side effects and inhibits cyclone intensity by deflecting cyclones. Greenland discourages poleward (equatorward) sensible heat transports in positive (negative) months of the North Atlantic Oscillation (NAO). It also strongly inhibits latent heat transports during negative NAO months when the monthly mean 500 hPa flow is meridional at the tip of Greenland. Reduced (increased) sea ice concentration increases (decreases) surfaces fluxes and near surface temperatures. Cyclone tracks are not changed by changes in concentration.
机译:本文研究了格陵兰岛冰盖和海冰盖在天气发展和通过“北大西洋通道”向北极极地输送能量方面的作用。使用区域数值天气预报模型(Polar MM5)进行了模拟。将单个旋风和长达一个月运行的控制模拟与灵敏度运行进行了比较,并具有以下地形:格陵兰岛被拆除,海冰条件不同。格陵兰岛通过背风副作用促进二级旋风分离器的形成,并通过使旋风分离器偏转来抑制旋风分离器的强度。格陵兰不鼓励在北大西洋涛动(NAO)的正月(负月)向极(赤道)方向传热。当月平均500 hPa流量在格陵兰岛的子午经线上时,它还可以在NAO负月期间强烈抑制潜热传递。减少(增加)的海冰浓度增加(减少)表面通量和近地表温度。旋风径不会因浓度变化而改变。

著录项

  • 作者

    Kindig, David N.;

  • 作者单位

    University of Colorado at Boulder.;

  • 授予单位 University of Colorado at Boulder.;
  • 学科 Physical Geography.; Physics Atmospheric Science.
  • 学位 M.A.
  • 年度 2006
  • 页码 98 p.
  • 总页数 98
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然地理学;大气科学(气象学);
  • 关键词

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