Quasi-Biennial Oscillation and Sudden Stratospheric Warmings during the Last Glacial Maximum

被引：7

作者：

Fu, Qiang ^{[1
]}

Wang, Mingcheng ^{[1
]}

White, Rachel H. ^{[2
]}

Pahlavan, Hamid A. ^{[1
]}

Alexander, Becky ^{[1
]}

Wallace, John M. ^{[1
]}

机构：

[1] Univ Washington, Dept Atmospher Sci, Seattle, WA 98195 USA

[2] Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC V6T 1Z4, Canada

来源：

ATMOSPHERE | 2020年 / 11卷 / 09期

基金：

欧盟地平线“2020”; 美国国家科学基金会;

关键词：

quasi-biennial oscillation; sudden stratospheric warmings; Last Glacial Maximum; BREWER-DOBSON CIRCULATION; CHANGING CLIMATE; MIDDLE ATMOSPHERE; PART I; MODEL; VARIABILITY; SENSITIVITY; TROPOSPHERE; SYSTEM; IMPACT;

D O I：

10.3390/atmos11090943

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The quasi-biennial oscillation (QBO) and sudden stratospheric warmings (SSWs) during the Last Glacial Maximum (LGM) are investigated in simulations using the Whole Atmosphere Community Climate Model version 6 (WACCM6). We find that the period of QBO, which is 27 months in the preindustrial and modern climate simulations, was 33 months in the LGM simulation using the proxy sea surface temperatures (SSTs) and 41 months using the model-based LGM SSTs. We show that the longer QBO period in the LGM is due to weaker wave forcing. The WACCM6 simulations of the LGM, preindustrial, and modern climates do not support previous modeling work that suggests that the QBO amplitude is smaller (larger) in a warmer (colder) climate. We find that SSWs in the LGM occurred later in the year, as compared to the preindustrial and modern climate, but that time of the final warming was similar. The difference in SSW frequency is inconclusive.

引用

页数：11

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