Understanding the Wave-Driven Circulation and Variability of the Polar Atmosphere through Coordinated Observation, Analysis, and Modeling

通过协调观测、分析和建模了解极地大气的波浪驱动环流和变化

• 批准号: 1107498
• 负责人: Richard Collins
• 金额: $ 78.39万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-15 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1107498&HistoricalAwards=false
• 关键词: Understanding; Wave; Driven; Circulation; Variability

The goal of this investigation is to understand the wave-driven circulation and variability of the polar atmosphere through an integrated study that combines satellite measurements, lidar measurements, meteorological analyses, and model simulations will be conducted. This study is an international collaboration between investigators at six institutions in Germany, Japan and the United States. An international network of four Rayleigh lidars located in observatories at Andoya, Norway (69°N, 16°E), Chatanika, Alaska (65°N, 147°W), Kangarlussuaq, Greenland (67°N, 51°W) and Kühlungsborn, Germany (54°N, 12°E) provide a chain of measurements from the eastern Arctic to the western Arctic under distinct synoptic regimes (i.e., the Arctic stratospheric vortex, the Aleutian anticyclone, the stratospheric surf-zone). The lidars will yield high-resolution temperature and density measurements that allow characterization of the planetary waves, tides, and gravity waves. The satellite observations yield synoptic-scale temperature measurements of the mesosphere and upper stratosphere while the meteorological soundings and analyses provide synoptic-scale measurements of the troposphere and lower stratosphere. We have three specific goals; i) to extend the scope of current Rayleigh lidar measurements to characterize a wider range of waves than previously measured ii) to combine lower-resolution global data from satellite observations and meteorological analyses with higher-resolution data from Arctic Rayleigh lidar systems to document both the synoptic conditions and wave activity. iii) to investigate the observed wave behavior using a comprehensive general circulation model to understand the wave mean-flow interactions. The proposed activity will provide a comprehensive analysis of the circulation of the Arctic atmosphere that will directly address the following specific studies; coupling and feedbacks between waves and large-scale circulation; the structure; evolution, and variability of polar vortices and anticyclones; links between the middle and lower atmosphere; and atmospheric tele-connections. The study will advance our understanding of wave mean-flow interactions both regionally and globally that is critical for understanding dynamical driving of the circulation and the evolution of the climate. This study will provide data and analyses in support of studies of ozone depletion, stratospheric climate, and long-range horizontal and vertical transport in the Arctic. The observations, analyses and results of this activity will contribute to the CAWSES, CEDAR, SEARCH, and SPARC programs.

本次调查的目标是通过将卫星测量、激光雷达测量、气象分析和模型模拟相结合的综合研究，了解波驱动的极地大气环流和变化。这项研究是德国、日本和美国六个机构的研究人员之间的国际合作。 位于挪威Andoya（69°N，16°E）、阿拉斯加Chatanika（65°N，147°W）、格陵兰Kangarlussuaq（67°N，51°W）和德国Kühlungsborn（54°N，12°E）观测站的四台瑞利激光雷达组成的国际网络提供了从北极东部到北极西部不同天气状况（即，北极平流层涡旋、阿留申反气旋、平流层冲浪带）。激光雷达将产生高分辨率的温度和密度测量，从而可以表征行星波，潮汐和重力波。 卫星观测提供中层和平流层上部的天气尺度温度测量结果，而气象探测和分析提供对流层和平流层下部的天气尺度测量结果。 我们有三个具体目标; i）扩大目前瑞利激光雷达测量的范围，以表征比以前测量的更大范围的波浪; ii）将来自卫星观测和气象分析的低分辨率全球数据与来自北极瑞利激光雷达系统的高分辨率数据相结合，以记录天气条件和波浪活动。iii）使用综合大气环流模型研究观察到的波浪行为，以了解波浪平均流相互作用。 拟议的活动将对北极大气环流进行全面分析，直接涉及以下具体研究：波和大规模环流之间的耦合和反馈;极地涡旋和反气旋的结构、演变和可变性;中层和低层大气之间的联系;以及大气远程连接。 这项研究将促进我们对区域和全球波动平均流相互作用的理解，这对于理解环流的动力驱动和气候演变至关重要。 这项研究将提供数据和分析，以支持对北极臭氧消耗、平流层气候和远距离水平和垂直迁移的研究。 这一活动的观察、分析和结果将有助于CAWSES、CEDAR、ESTA和ESTA计划。