Comparative Analysis of Gravity Wave Characteristics in China and the United States Using High Vertical Resolution Radiosonde Observations

Author:

Chen Qiying12ORCID,Wu Hongkun3,Long Haichuan4,Liang Xin‐Zhong56ORCID

Affiliation:

1. CMA Earth System Modeling and Prediction Centre Beijing China

2. State Key Laboratory of Severe Weather (LaSW) Beijing China

3. Southwest Branch of Air China Chengdu China

4. China State Shipbuilding Corporation Limited Chongqing China

5. Department of Atmospheric and Oceanic Science University of Maryland College Park MD USA

6. Earth System Science Interdisciplinary Center University of Maryland College Park MD USA

Abstract

AbstractThe characteristics of gravity waves in China are investigated through an extensive analysis of high vertical resolution radiosonde observations collected over eight years across 120 stations, and are subsequently compared to those in the United States. These characteristics encompass energy density, intrinsic frequencies, horizontal and vertical wavelengths, as well as vertical and horizonal propagation directions. China and the United States, situated in mid‐latitude regions with prominent western topographical features, the Qinghai‐Tibet Plateau and Rocky Mountains respectively, demonstrate striking similarities in the generation and distribution of gravity waves. Both landmasses exhibit the strongest gravity waves during winter and the weakest during summer. And within the troposphere, the maximum energy of gravity waves is generated over and immediately downstream of the topographies. In addition, the energy level is amplified in the lower stratosphere. However, unique regional contrasts in summer are result from the differences of summer monsoon influence and the distinct western topographies. The maximum gravity wave energy in summer troposphere is observed over the north side of the Qinghai‐Tibet Plateau in China, contrasting with its location downstream of the Rockies in the United States.

Funder

National Natural Science Foundation of China

Publisher

American Geophysical Union (AGU)

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