Effects of the quasi biennial oscillation in the tropics on interannual variations of atmosphere and chemistry in the extratropics

热带准两年期振荡对温带大气和化学成分年际变化的影响

基本信息

批准号：
20340129
负责人：
SHIBATA Kiyotaka
金额：
$ 10.98万
依托单位：
Japan, Meteorological Research Institute
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2008
资助国家：
日本
起止时间：
2008 至 2011
项目状态：
已结题

项目摘要

Effects of the quasi biennial oscillation(QBO) in the tropics on interannual variations of atmosphere and chemistry in the extratropics were investigated with data of a chemistry-climate model(MRI-CCM) and the ERA-40 Reanalysis. It was found that the conventional Holton-Tan explanation that the equatorial winds in the lower stratosphere act as a waveguide for midlatitude planetary wave propagation cannot explain the winter circulation in either the ERA-40 data or the simulation. Although the composite differences in zonal wind and temperature show a slight yet statistically significant Holton-Tan effect, i. e., the stratospheric polar vortex is weaker and more disturbed under easterly QBO conditions, the EP-flux diagnostics do not show more poleward propagation in the midlatitude stratosphere. Rather, planetary waves propagate more equatorward as well as more upward during the easterly phase of the QBO. Further, future projection of the QBO and its effect on the extratropics was also investigated with the MRI-CCM.

使用化学气候模型（MRI-CCM）和ERA-40重新分析的数据研究了准双年展振荡（QBO）在热带地区对大气和化学际变化的影响。发现常规的Holton-TAN解释是，平流层下部的赤道风充当中纬度行星波传播的波导无法解释ERA-40数据或模拟中的冬季循环。尽管区域风和温度的复合差异显示出轻微但具有统计学意义的霍尔顿棕褐色效应，但i。例如，平流层极性涡流较弱且在东方QBO条件下更加干扰，EP-Flux诊断在中纬度平流层中不会显示出更多的极点传播。相反，行星波在QBO的东方阶段传播更多的赤道和更向上。此外，还通过MRI-CCM研究了对QBO的未来预测及其对解剖学的影响。

项目成果

期刊论文数量（0）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Attribution of observed changes in stratospheric ozone and temperature

DOI：
10.5194/acp-11-599-2011
发表时间：
2010-07
期刊：
Atmospheric Chemistry and Physics
影响因子：
6.3
作者：
N. Gillett;H. Akiyoshi;S. Bekki;P. Braesicke;V. Eyring;R. Garcia;A. Karpechko;C. McLinden;O. Morgenstern;D. Plummer;J. Pyle;E. Rozanov;J. Scinocca;K. Shibata
通讯作者：
N. Gillett;H. Akiyoshi;S. Bekki;P. Braesicke;V. Eyring;R. Garcia;A. Karpechko;C. McLinden;O. Morgenstern;D. Plummer;J. Pyle;E. Rozanov;J. Scinocca;K. Shibata

21世紀予測実験に基づいた成層圏における子午面循環の長期変動解析

基于21世纪预测实验的平流层经向环流长期变化分析