Biogenic Potassium Salt Particles as Seeds for Secondary Organic Aerosol in the Amazon

被引：154

作者：

Poehlker, Christopher ^{[1
]}

Wiedemann, Kenia T. ^{[2
,3
,4
]}

Sinha, Baerbel ^{[5
,6
]}

Shiraiwa, Manabu ^{[1
,7
]}

Gunthe, Sachin S. ^{[1
,8
]}

Smith, Mackenzie ^{[3
]}

Su, Hang ^{[1
]}

Artaxo, Paulo ^{[2
]}

Chen, Qi ^{[3
]}

Cheng, Yafang ^{[1
]}

Elbert, Wolfgang ^{[1
]}

Gilles, Mary K. ^{[9
]}

Kilcoyne, Arthur L. D. ^{[10
]}

Moffet, Ryan C. ^{[8
,11
]}

Weigand, Markus ^{[12
]}

Martin, Scot T. ^{[3
]}

Poeschl, Ulrich ^{[1
]}

Andreae, Meinrat O. ^{[1
]}

机构：

[1] Max Planck Inst Chem, Biogeochem Dept, D-55020 Mainz, Germany

[2] Univ Sao Paulo, Inst Phys, BR-05508900 Sao Paulo, Brazil

[3] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[4] Univ Arizona, Ecol & Evolutionary Biol Dept, Tucson, AZ 85721 USA

[5] Max Planck Inst Chem, Particle Chem Dept, D-55020 Mainz, Germany

[6] Indian Inst Sci Educ & Res Mohali, Dept Earth & Environm Sci, Sas Nagar, Manauli PO, India

[7] CALTECH, Div Chem & Chem Engn, Pasadena, CA 91125 USA

[8] Indian Inst Technol, Environm & Water Resources Engn Div, Dept Civil Engn, Madras 600036, Tamil Nadu, India

[9] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Chem Sci, Berkeley, CA 94720 USA

[10] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[11] Univ Pacific, Dept Chem, Stockton, CA 95211 USA

[12] Max Planck Inst Intelligent Syst, D-70569 Stuttgart, Germany

来源：

SCIENCE | 2012年 / 337卷 / 6098期

基金：

美国国家科学基金会;

关键词：

LIQUID PHASE-SEPARATION; ATMOSPHERE; FOREST; BASIN; RELEASE; NUCLEI; SULFUR; CLOUDS; CARBON; WET;

D O I：

10.1126/science.1223264

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The fine particles serving as cloud condensation nuclei in pristine Amazonian rainforest air consist mostly of secondary organic aerosol. Their origin is enigmatic, however, because new particle formation in the atmosphere is not observed. Here, we show that the growth of organic aerosol particles can be initiated by potassium-salt-rich particles emitted by biota in the rainforest. These particles act as seeds for the condensation of low- or semi-volatile organic compounds from the atmospheric gas phase or multiphase oxidation of isoprene and terpenes. Our findings suggest that the primary emission of biogenic salt particles directly influences the number concentration of cloud condensation nuclei and affects the microphysics of cloud formation and precipitation over the rainforest.

引用

页码：1075 / 1078

页数：4

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