Collaborative Research: CEDAR--Observational and Numerical Studies of Tide-planetary Wave Coupling

合作研究：CEDAR——潮汐-行星波耦合的观测和数值研究

• 批准号: 1139048
• 负责人: Jens Oberheide
• 金额: $ 15.13万
• 依托单位: Clemson University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1139048&HistoricalAwards=false
• 关键词: Collaborative; Research; CEDAR; Observational; Numerical

The goal of this project is to delineate and understand variability in the mesosphere-lower thermosphere due to the interaction of atmospheric tides and planetary waves. The approach is to employ temperature measurements from the TIMED and EOS satellites, data recorded by ground-based wind radars, and an observation-driven, nonlinear mechanistic model. Satellite data will be used to diagnose planetary waves and to recover the spectrum of diurnal tides. Global tidal winds will be computed from the observed temperature tides, and synthesized at longitudes and latitudes of individual radars. A comparative analysis with the radar data will then be used to validate the global tidal winds and to illuminate the extent to which local temporal variations can be attributed to global-scale influences including cross-hemisphere coupling. The underlying mechanisms and origins of tide-planetary wave interaction, including forcing terms, relative importance compared to other tidal sources and the role of atmospheric background conditions will be diagnosed from various model runs.

该项目的目标是描绘和了解由于大气潮汐和行星波的相互作用而引起的中间层-低热层的变化。 该方法采用TIMED和EOS卫星的温度测量值，地面风雷达记录的数据，以及观测驱动的非线性机理模型。卫星数据将用于诊断行星波和恢复昼夜潮汐的频谱。全球潮汐风将由观测到的温度潮汐计算，并在各个雷达的纬度和纬度上合成。 与雷达数据的比较分析，然后将被用来验证全球潮汐风和照明的程度，当地的时间变化可以归因于全球尺度的影响，包括跨半球耦合。 潮汐-行星波相互作用的基本机制和起源，包括强迫项、与其他潮汐源相比的相对重要性以及大气背景条件的作用，将从各种模式运行中进行诊断。