Download Abstracts Here - IGAC Project

List of Abstracts 186and abiotic parameters (including diurnal cycle sensibility and emission modes); processes of C exchangesbetween different compartments of the biota can be studied. Such investigations are required for a betterunderstanding of the lands to atmosphere exchange mechanisms of GHG and for the prediction of feedbackson GHG emissions in response to anthropogenic or climate change perturbations of terrestrial ecosystems.Implications of SPIRIT in other air lands studies are also presented.P-Observations 2.41 ID:4181 10:30Microphysical Properties of Low Altitude clouds in East AsiaMakoto Koike 1 , N. Moteki 1 , N. Takeagawa 1 , M. Ui 1 , Y. Kondo 1 , N. Oshima 1 , H. Matsui 1 , M. Kajino 1 , K.Kita 21 University of Tokyo2 Ibaraki UniversityContact: koike@eps.s.u-tokyo.ac.jpIn-situ measurements of cloud properties, namely, cloud droplet size distribution, liquid water content(LWC), and droplet shape information, were made using the Cloud Aerosol and Precipitation Spectrometer(CAPS) instrument (DMT, Boulder, CO) onboard the chartered King Air aircraft during the AerosolRadiative Forcing in East Asia (A-FORCE) aircraft campaign, which was conducted over the East China Seaand Yellow Sea in March-April 2009. In total, 21 flights were conducted and cloud properties weremeasured during 9 maneuvers (7 flights) within stratus and stratocumulus clouds. Mean cloud dropletnumber concentrations (CDNC) were between 300 and 1900 cm-3, and they were greater by factors of 2 to 5than those observed during previous stratus/stratocumulus measurements, such as those observed off thecoast of California. In accordance with these high CDNC, mean effective diameters are systematicallysmaller than previous observations when data with the same LWC are compared. These results indicate thatmicrophysical properties of stratus/stratocumulus clouds over the East China Sea and Yellow Sea in springare quite unique. These high CDNC are consistent with high aerosol number concentrations in theaccumulation mode observed below clouds during A-FORCE and high cloud condensation nuclei (CCN)concentrations previously observed at Gosan station on Cheju Island, Korea (33.28°N, 126.17°E) in spring.P-Observations 2.42 ID:4561 10:30Space-based observations of HCHO/NO2 from Aura's Ozone Monitoring Instrument during the 2008Beijing Summer Olympics and ParalympicsJacquelyn Witte 1 , Bryan Duncan 2 , Anne Douglass 2 , Thomas Kurosu 3 , James Gleason 21 SSAI2 NASA/GSFC3 Harvard-Smithsonian Center for AstrophysicsContact: jacquelyn.witte@nasa.govIn preparation of the Beijing summer Olympic and Paralympic games, strict emission controls were imposedbetween July and September 2008 on motor vehicle traffic and industrial emissions to improve air qualitystandards for the competitors. We assess the effectiveness of these controls using the Ozone MonitoringInstrument (OMI) measurements of HCHO and NO2 column amounts, where the ratio serves as a proxy forozone production sensitivity. The 2005-2007 OMI record of HCHO/NO2 show that Beijing is generally in aVOC-limited regime through-out most of the year. However, during the summer of 2008, when emissionreductions were imposed, the HCHO/NO2 ratio was much greater than unity indicating a strong NOxsensitiveregime. This was due to dramatic reductions in tropospheric NO2 largely in response to vehicularrestrictions within the province. This sustained enhancement of the HCHO/NO2 ratio over Beijing andtransition to a strong NOx-limited regime is a unique feature in the OMI data record over eastern China.iCACGP-IGAC 2010 14 July, 2010