Observations of organic species and atmospheric ice formation

被引:67
作者
Cziczo, DJ
DeMott, PJ
Brooks, SD
Prenni, AJ
Thomson, DS
Baumgardner, D
Wilson, JC
Kreidenweis, SM
Murphy, DM
机构
[1] NOAA, Aeron Lab, Boulder, CO 80303 USA
[2] Univ Colorado, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA
[3] Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA
[4] Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City 04510, DF, Mexico
[5] Univ Denver, Dept Engn, Denver, CO 80208 USA
关键词
D O I
10.1029/2004GL019822
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Aerosol particles found in the lower confines of the atmosphere are typically internal mixtures of sulfate, inorganic salts, refractory components, and organic species. The effect these complex combinations have on cloud formation processes remains largely unknown. We have conducted two complementary studies on one important process, the homogeneous formation of ice by small particles. In the first study the freezing of atmospheric aerosol was induced using controlled temperature and humidity conditions. In the second study the chemical composition of the residue from ice crystals in high altitude clouds was analyzed. Here we show that organic components do not partition equally to the ice and aqueous phases. Instead, organic-rich particles preferentially remain unfrozen. These results suggest that emissions of organic species have the potential to influence aerosol-cold cloud interactions and climate.
引用
收藏
页码:L121161 / 4
页数:4
相关论文
共 27 条
[1]  
[Anonymous], CLIMATE CHANGE 2001
[2]   Cloud microphysics and climate [J].
Baker, MB .
SCIENCE, 1997, 276 (5315) :1072-1078
[3]   The cloud, aerosol and precipitation spectrometer: a new instrument for cloud investigations [J].
Baumgardner, D ;
Jonsson, H ;
Dawson, W ;
O'Connor, D ;
Newton, R .
ATMOSPHERIC RESEARCH, 2001, 59 :251-264
[4]  
Borys RD, 1997, B AM METEOROL SOC, V78, P2115, DOI 10.1175/1520-0477(1997)078<2115:SPLART>2.0.CO
[5]  
2
[6]  
Brenguier JL, 2000, J ATMOS SCI, V57, P803, DOI 10.1175/1520-0469(2000)057<0803:RPOBLC>2.0.CO
[7]  
2
[8]  
Chen YL, 2000, J ATMOS SCI, V57, P3752, DOI 10.1175/1520-0469(2000)057<3752:IFBSAS>2.0.CO
[9]  
2
[10]   Single particle analyses of ice nucleating aerosols in the upper troposphere and lower stratosphere [J].
Chen, YL ;
Kreidenweis, SM ;
McInnes, LM ;
Rogers, DC ;
DeMott, PJ .
GEOPHYSICAL RESEARCH LETTERS, 1998, 25 (09) :1391-1394