Introduction to China National key project

Stratospheric Process and Its Role in

Weather and Climate in Eastern Asia

Daren Lu

LAGEO/IAP/CAS

ASM-STE, Lhasa, Jul 21-23, 2010

Collaborators Collaborators

IAPCAS

Dep. Atmos.Peking U.

College A.S.Lanzhou U.

CAMSCMA

National C CCMA

Dep. A.S.U. S&T China

Nanjing U. Inform. S&T

Dep. A.S.Yunnan U.

Contents

1. Introduction

2. Key scientific issues

3. Scientific goals

4. Scientific strategy

5. Scientific team

Plan for field campaign in 2010

T structureT structure

T （ ºC ）

Stratosphere

O3 layer

Strato

sph

ere

BD Circ.

O3 depletion

tropics Mid-lat. polar

SolarProcesses in ST Processes in ST

GW breaking GW Breaking

Planetary waves

Tro

po

sph

ere

tropopause

stratopause

Cordero and Forster, 2006

Alt

.（km

）

P（

hP

a)

Climate model top in IPCC-AR4Climate model top in IPCC-AR4

Simple description of stratosphere in climate model.

IAP/CAS

Cordero and Forster, 2006

Global mean T T bias

T （ K ） T bias （ K ）

P（

hP

a）

P（

hP

a）

Simulated results in IPCC-AR4 (1979-1999) Simulated results in IPCC-AR4 (1979-1999)

Stratosphere

Troposphere

Cordero and Forster, 2006

Global temperature trend in IPCC-AR4 (1958-1999) Global temperature trend in IPCC-AR4 (1958-1999)

trend （ K/dec ）

气压

（h

Pa

）

stratosphere

Troposphere

Figure 1.2

第一次评估 1990 第二次评估 1996

第三次评估 2001 第四次评估 2007Figure 1.2Figure 1.2

AR5stratosphere

将来

CCM history

降雨 云

沼泽海洋

陆表冰盖

气溶胶碳循环

CCM Future

植被

O3 depletion & Antarctic O3 hole O3 depletion & Antarctic O3 hole

ODS decrease & recovery of O3 layer ODS decrease & recovery of O3 layer

时间时间超前超前

时间尺度延长时间尺度延长

时间超前

时间尺度延长

平流层

对流层

Composites of NAM for 18 weak vortex events Composites of NAM for 18 weak vortex events

（（ Baldwin & Dunkerton, Science 2001 ）

Stratospheric Harbingers of Anomalous Weather Regimes

15 天

Vast snow and ice disasters in South China in early 2008 caused significant economic losses

Snow-storm

& freezing

Height anomaly during Jan 1-27, 2008 (along 60ºN)

High Trough

Pre-disaster: Anomalous signal in stratosphere propagated downward

Jan 1

Jan 5

Jan 25

Jan 20

Jan 15

对流输送

等熵输送

对流输送

下侵

长距离输送

复杂边界

Role of Tibet Plateau ？

Topic 1: Atmospheric dynamics, physics, and chemistry in UTLS, Topic 1: Atmospheric dynamics, physics, and chemistry in UTLS,

particular in eastern Asia particular in eastern Asia

QBO

Wave driven pump

信号下传

Wave breaking

波产生

Topic 2: ST coupling in different scales, particular the mechanism of Topic 2: ST coupling in different scales, particular the mechanism of

stratospheric process affecting weather and climate in EA stratospheric process affecting weather and climate in EA

B-D Cir

chemistry

Topic 3: Chemistry-climate coupling under external forcing, such as Topic 3: Chemistry-climate coupling under external forcing, such as

human activity and solar activity human activity and solar activity

radiation

Topic 4: Interaction between Topic 4: Interaction between

climate warming and ozone climate warming and ozone

recovery recovery

Ozone recovery

Climate warming

to understand the UTLS structure in Eastern Asia

to understand ST coupling in different scales

to understand chemistry-climate coupling

to understand climate and weather processes in

Eastern Asia affected by stratospheric process

to project the climate trend under ozone recovery and

increase of global greenhouse gas

Scientific goals Scientific goals

Scientific strategy Scientific strategy

UTLS

ST dynamic coupling

Chemistryclimate coupling

Data

(campaign)(satellite)

(……)

Model simulation

Dynamic diagnoses

Project of O3 recovery & climate change

Index of weather and climate in stratosphere

1. Stratospheric process and structure observation in

East Asia. To provide dataset for stratospheric processes in EA, to

understand stratospheric processes in EA, and to provide data base for the

whole project and model validation. –Daren Lu, IAP/CAS

2. Atmospheric processes in UTLS. To understand structure in EA

UTLS, to estimate the STE role over EA in global budget, and to understand the

deep convection transport to UTLS in EA.—Jianchun Bian, IAP/CAS

3. Process and mechanism of ST dynamical coupling. To

understand the climatology of GWs in EA, to understand the activity of planetary

waves and their role in ST coupling, and to understand the mechanism of

stratosphere acting on troposphere. –Wen Chen, IAP/CAS

Scientific themes Scientific themes

4. Chemistry-climate coupling and the role of EA

monsoon and human activity. To understand the impact of climate

change on the trend of stratospheric species (O3, H2O), to understand the

impact of human, solar and volcanic activity on stratosphere, to estimate the

role of EA monsoon in CC coupling. –Wenshou Tian, Lanzhou U.

5. Ozone layer recovery and its role on climate change. To

understand the trend of ozone layer, to project the recovery of ozone layer in

21st century and its impact from climate change. –Yu Liu, CAMS/CMA

6. Anomalous stratospheric process and its relation to

weather and climate in EA. To analyze the correlation between

stratospheric process and weather and climate in EA, to understand the

involved mechanism. –Yongyun Hu, Peking U.

Scientific themes Scientific themes

O3 & H2O sonde

Campaign Campaign

Sonde

Lidar

ST radar

Satellite

ST radar

Lhasa

Lanzhou

Beijing

Hefei

Wuhan

拉 萨 (2008)

香 河 (1979)

昆 明 (1980)

瓦里关 (1993)

临 安 (1993)

龙凤山 (1993)

Total ozone observation network Total ozone observation network

Brewer Dobson

InstrumentLaunch

timeHeight range

Vertical Resolution

Products

MIPAS 2002tropopause

~70 km3 km O3, H2O, NO2, T,

aerosol

GOMOS 2002tropopause

~100 km1.7 km O3, H2O, NO2, NO3, T,

aerosol

SCIA-MACHY

2002 0-100 km 3 kmO3, H2O, NO2, N2O,

OClO, BrO, CO, CH4, SO2, aerosol

OMIMLS

2004 0-100 km 1 ～ 3 km O3, H2O, OH, CO, HNO3, NO, NO2, BrO, SO2, arsl

COSMIC 2006 0-60 km 200 m T, ρ

CloudSat 2006 0-20 km ~150 m Cloud profile

CALIPSO 2006 0-20 km ~50 m Cloud, thin cirrus, aerosol

Satellite data Satellite data

Numerical model Numerical model

Global chemistry-climate simulation:

UMSLIMCAT from Leeds

WACCM from NCAR

Regional mesoscale: WRF+CHEM

Convection: 3D convection model

＋

Scientific team Scientific team

1. IAP/CAS -Daren Lu, Hongbin Chen, Jianchun Bian, Wen Chen, Xiushu Qie,

Yi Liu, Zeyun Chen, Rongcai Ren, Shuanglin Li, Yuejian Xuan, Xuexi Tie

2. Peking University –Yongyun Hu, Benkui Tan, Zuntao Fu

3. Lanzhou University –Wenshou Tian, Qiang Fu, Lei Zhang

4. Yunnan Univesity –Shichang Guo, Weiguo Wang

5. University of Science & Technology of China –Yunfei Fu, Yuejuan

Chen, Renjun Zhou

6. Nanjing University of Information Science & Technology –Lianji

Jin, Chunhua Shi, Renqiang Liu

7. Chinese Academy of Meteorological Sciences –Yu Liu, Xuepeng

Zhao, Hongli Liu

8. National Climate Center/CMA –Yanjun Guo, Xiaolong Jia, Ying Sun

Cut-off low in Northeast China—Stratospheric intrusion

Site: Changchun, Qiqihaer, Beijing

Instrument: Ozonesonde, surface O3, NOx, CO, SO2, all-sky imager

Period: May 24-Jun 25

Troposphere to stratosphere transport over Tibet in

summer

Site: Lhasa

Instrument: H2O & O3 sonde, COBALD

Period: Aug 15-30

Plan for field campaign in 2010

Thanks for your attention