Observations of H2SO4 and MSA during PEM-Tropics-A

被引:52
作者
Mauldin, RL
Tanner, DJ
Heath, JA
Huebert, BJ
Eisele, FL
机构
[1] Natl Ctr Atmospher Res, Div Atmospher Chem, Boulder, CO 80307 USA
[2] Univ Hawaii, Dept Oceanog, Honolulu, HI 96822 USA
[3] Georgia Inst Technol, Electroopt Environm & Mat Lab, Georgia Tech Res Inst, Atlanta, GA 30332 USA
关键词
D O I
10.1029/98JD02612
中图分类号
P4 [大气科学(气象学)];
学科分类号
0706 ; 070601 ;
摘要
Results are presented of measurements of the concentration of gas phase H2SO4 and methane sulfonic acid (MSA) performed aboard the NASA P3-b aircraft during the Pacific Exploratory Mission (PEM) Tropics study using the selected ion chemical ionization mass spectrometry (SICIMS) technique. During a nighttime portion of one flight the [H2SO4] was found to increase with decreasing relative humidity (RH). When compared to laboratory measurements of H2SO4 vapor pressure as a function of RH and particle neutralization (NH4+ and SO42- ionic composition) and model predictions using a liquid drop hydrate model, these measurements indicate that the particles from which the H2SO4 is evaporating are relatively unneutralized, a result which is in good agreement with filter measurements. Overall, the same increase in the gas phase [MSA] with decreasing RH or decreasing [NH4+] (obtained from filter measurements) was also observed, indicating a hi,oh volatility of MSA at low RH values or particle neutralization. When gas phase MSA values are compared to methane sulfonate (MS) values obtained from filter measurements, it was found that MSA was totally volatilized at low RH values, while MSA resides mainly in the particulate form at high RH values. Combining the gas phase and filter measurements, the boundary layer MS/(MS + SO42-) ratio showed a distinct increase with decreasing temperature and suggests that little or no MS or MSA is produced in the boundary layer at temperatures above 300 K.
引用
收藏
页码:5801 / 5816
页数:16
相关论文
共 28 条
[1]   DIMETHYL SULFIDE IN THE MARINE ATMOSPHERE [J].
ANDREAE, MO ;
FEREK, RJ ;
BERMOND, F ;
BYRD, KP ;
ENGSTROM, RT ;
HARDIN, S ;
HOUMERE, PD ;
LEMARREC, F ;
RAEMDONCK, H ;
CHATFIELD, RB .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1985, 90 (D7) :2891-2900
[2]   ON THE VAPOR-PRESSURE OF SULFURIC-ACID [J].
AYERS, GP ;
GILLETT, RW ;
GRAS, JL .
GEOPHYSICAL RESEARCH LETTERS, 1980, 7 (06) :433-436
[3]   COHERENCE BETWEEN SEASONAL CYCLES OF DIMETHYL SULFIDE, METHANESULFONATE AND SULFATE IN MARINE AIR [J].
AYERS, GP ;
IVEY, JP ;
GILLETT, RW .
NATURE, 1991, 349 (6308) :404-406
[4]   Role of adducts in the atmospheric oxidation of dimethyl sulfide [J].
Barone, SB ;
Turnipseed, AA ;
Ravishankara, AR .
FARADAY DISCUSSIONS, 1995, 100 :39-54
[5]   THE ROLE OF THE OCEAN IN A REGIONAL SULFUR CYCLE [J].
BATES, TS ;
CLINE, JD .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1985, 90 (NC5) :9168-9172
[6]   BIOGENIC SULFUR EMISSIONS FROM THE SUB-ANTARCTIC AND ANTARCTIC OCEANS [J].
BERRESHEIM, H .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1987, 92 (D11) :13245-13262
[7]   OCEANIC PHYTOPLANKTON, ATMOSPHERIC SULFUR, CLOUD ALBEDO AND CLIMATE [J].
CHARLSON, RJ ;
LOVELOCK, JE ;
ANDREAE, MO ;
WARREN, SG .
NATURE, 1987, 326 (6114) :655-661
[8]   Aerosol dynamics in the equatorial Pacific Marine boundary layer: Microphysics, diurnal cycles and entrainment [J].
Clarke, AD ;
Li, Z ;
Litchy, M .
GEOPHYSICAL RESEARCH LETTERS, 1996, 23 (07) :733-736
[9]   NEW PARTICLE FORMATION IN THE MARINE BOUNDARY-LAYER [J].
COVERT, DS ;
KAPUSTIN, VN ;
QUINN, PK ;
BATES, TS .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1992, 97 (D18) :20581-20589
[10]   An inlet/sampling duct for airborne OR and sulfuric acid measurements [J].
Eisele, FL ;
Mauldin, RL ;
Tanner, DJ ;
Fox, JR ;
Mouch, T ;
Scully, T .
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1997, 102 (D23) :27993-28001