Development of general circulation model with chemistry and studies on stratospheric material transport

化学大气环流模型的建立和平流层物质输运研究

• 批准号: 11219202
• 负责人: TAKAHASHI Masaaki
• 金额: $ 28.86万
• 依托单位: Tokyo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11219202/
• 关键词: stratospheric ozone; gravity waves; General Circulation Models; chemical processes; ozone hole; aerosol; SOx; Baiu front; 動力波; 成層圏化学過程; 極成層圏雲; 臭素系物質; ナッジング; 高分解能水惑星モデル; 大気化学; 物質循環; 大気大循環化学モデル; オゾン; HOX; NOX; CLOX

Stratospheric ozone change and it's impact to climate change are studied, using General Circulation Models (GCMs). Main subjects are ;1) We investigate the mechanism of ozone change and climate impact including stratospheric chemical processes to GCMs.2) We investigate dynamical processes, transport processes, and relation to chemical processes using high resolution GCMs.Firstly, stratospheric aerosol processes are included in chemical GCMs. Then, stratospheric Sox chemistry and Sox budgets in the stratosphere are studied. Stratospheric Sox budgets are mainly determined by SO_2 in the troposphere, and transported to the stratosphere. After that, stratospheric aerosols are formed. Next, polar stratospheric clouds processes are included in chemical GCMs. Then, ozone hole experiments are done. Though ozone hole is simulated in the northern hemisphere, year to year variations are strong. Ozone hole is weak in other year, and ozone hole is strong in a year. Southern hemisphere ozone hole is also simulated, but stratospheric sudden warming and ozone hole breaking are not simulated. This is because the model has cooling bias in the polar stratosphere. Further, future ozone hole simulation is done. Ozone hole recovery in the southern hemisphere is about year 2040 in the model. This result is almost determined by fron loading.High resolution physical GCMs are developed. The model can simulate meso-scale phenomena. Baiu front, ITCZ, SPCZ are well simulated. High resolution GCMS also simulate gravity waves. Gravity waves are important in the stratosphere. Diurnal cycle gravity waves are well simulated in the equatorial lower stratosphere.

使用大气环流模型 (GCM) 研究平流层臭氧变化及其对气候变化的影响。主要科目是；1) 我们研究臭氧变化和气候影响的机制，包括平流层化学过程对 GCM 的影响。2) 我们使用高分辨率 GCM 研究动力过程、传输过程以及与化学过程的关系。首先，包括平流层气溶胶过程在化学 GCM 中。然后，研究了平流层的 Sox 化学和平流层中的 Sox 预算。平流层Sox预算主要由对流层中的SO_2决定，并输送到平流层。之后，形成平流层气溶胶。接下来，极地平流层云过程包含在化学 GCM 中。然后，进行臭氧空洞实验。尽管在北半球模拟了臭氧空洞，但每年的变化很大。其他年份臭氧空洞弱，当年臭氧空洞强。还模拟了南半球臭氧空洞，但没有模拟平流层突然变暖和臭氧空洞破裂。这是因为该模型在极地平流层存在冷却偏差。此外，还完成了未来臭氧空洞的模拟。模型中南半球臭氧层空洞的恢复时间约为 2040 年。这个结果几乎是由加载决定的。高分辨率物理GCM被开发出来。该模型可以模拟细观尺度现象。 Baiu锋、ITCZ、SPCZ模拟得很好。高分辨率 GCMS 还模拟重力波。重力波在平流层中很重要。赤道低平流层中的昼夜周期重力波得到了很好的模拟。

项目成果

Kawatani, Y., M.Takahashi: "Simulation of the Baiu front in a high resolution AGCM"J.Meteor.Soc.Japan. 81(in press). (2003)

Kawatani, Y., M.Takahashi：“高分辨率 AGCM 中的 Baiu 锋面模拟”J.Meteor.Soc.Japan。

Akiyoshi, H., S.Sugata, T.Sugita, H.Nakajima, M.Takahashi: "A low-N2O airmass simulated by the CCSR/NIES nudging CTM and observed by ILAS in 1997"J. Meteor. Soc. Japan. (in press). (2002)

Akiyoshi, H., S.Sugata, T.Sugita, H.Nakajima, M.Takahashi：“CCSR/NIES 微动 CTM 模拟并由 ILAS 于 1997 年观测到的低 N2O 气团”J.

Nagashima, T., M.Takahashi, M.Takigawa, H.Akiyoshi: "Future development of the ozone layer calculated by a general circulation model with fully interactive chemistry"Geophys.Res.Letters. 29(8). 3.1-3.4 (2002)

Nagashima, T.、M.Takahashi、M.Takikawa、H.Akiyoshi：“通过具有完全交互化学的大气环流模型计算的臭氧层的未来发展”Geophys.Res.Letters。

Akiyoshi,H.: "Modeling of chemistry and chemistry-radiation coupling processes for the middle atmosphere and a numerical experiment on CO2 doubling with a 1-D coupled mode."J.Meteor.Soc.Japan. 78. 563-584 (2000)

Akiyoshi,H.：“中层大气的化学和化学-辐射耦合过程的建模以及采用一维耦合模式进行 CO2 倍增的数值实验。”J.Meteor.Soc.Japan。

Horinouchi, T.: "Mesoscale variability of tropical precitation : validation of satellite estimates of wave forcing using TOGA-COARE radar data"J. Atmos. Sci.. 59-16. 2428-2437 (2002)

Horinouchi, T.：“热带降水的中尺度变化：使用 TOGA-COARE 雷达数据验证卫星对波浪强迫的估计”J.