Jianchun BIAN, and Hongbin CHEN

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Presentation transcript:

UTLS Water Vapor and Ozone Measurements in Kunming during Asian Summer Monsoon Jianchun BIAN, and Hongbin CHEN LAGEO, Institute of Atmospheric Physics, Chinese Academy of Sciences Holger Vömel GRUAN Lead Center, Meteorologisches Observatorium Lindenberg, German Weather Service Laura Pan ACD/NCAR bjc@mail.iap.ac.cn UTLS Workshop, Boulder, 2009-09-21

Outlines Overview Large scale conditions Profiles Summary

Overview Asian anticyclone is the dominant circulation feature in the UTLS during NH summer. Asian monsoon is a critical factor in the global troposphere-to-stratosphere transport. It has significant impact on UTLS water vapor budget , and is also an efficient transport pathway for anthropogenic emissions to get into the stratosphere Many studies used satellite data and models, which do not provide enough details for characterizing the transport process. There is a debate on the roles of convective and synoptic processes in the TST of water vapor We are presenting the first in situ measurements of ozone/water vapor inside the anticyclone, the data providing information on the structure and strength of the circulation, complements the large scale satellite observations

Kunming (25.01ºN, 102.65ºE, 1.889 km) H Launch site

Westerly Easterly

Participants Institute of Atmospheric Physics, CAS Chinese Academy of Meteorological Sciences Kunming Climate Observatory, CMA Holger Vömel ACD/NCAR

Instruments CFH: H2O RS80: T, RH, P GPS: wind ECC O3 sonde: O3 L-Band: T, RH, P, wind for intercomparison

Summary of sounding information (Aug 7-13, 2009) A total of eleven soundings were launched. No. Launch Time (Beijing local time) GTS1 RS80 Burst Altitude (km) GTS1 RS80 1 20090807 14:02:05 A 33.11 2* 20090808 14:11:00 20090808 14:11:00 H 30.49 3* 20090809 14:02:24 20090809 14:02:24 A 31.15 4 20090809 19:15:47 20090809 19:04:02 A 33.28 33.72 5* 20090810 14:12:32 20090810 14:12:32 H 31.96 6 20090810 19:15:13 20090810 19:04:09 A 36.95 34.98 7* 20090811 14:06:10 20090811 14:06:10 A 33.15 8 20090811 19:15:28 20090811 19:02:41 H 37.90 33.82 9* 20090812 14:02:21 20090812 14:02:21 A 31.64 10* 20090813 13:59:41 20090813 13:59:41 H 32.57 11 20090813 19:15:17 20090813 19:31:30 A 5.92 31.92 *) Sondes launched on the same balloon; A and H demote the Vaisala humicap sensor type of RS80, A-humicap and H-humicap, respectively.

Height at 100 hPa during Aug 6-13, 2009 Asian High center moved westward

Main outflow at so high level? O3: 35 ppb H2O: 2.0 ppm CPT: -80.89ºC Both extremely low value near 100mb !!! Positive Correlation 0.03

Super-saturation Multi-layer 70mb Super-saturation Multi-layer Due to sub-cell in the neighborhood of Tibet Plateau?

RH 70mb

O3 H2O

O3 0.04 H2O

Comments and suggestions are welcome! Summary For the first time, H2O and O3 in UTLS were measured during Asian summer monsoon Some preliminary analysis: some finer and interesting structures super-saturation and multi-layer in UT Much more further analysis combined with satellite data and trajectory model is under way Comments and suggestions are welcome! Thank you very much!