Measurements of selected dicarboxylic acids in marine cloud water

Hegg, D́ean A.; Gao, Song; Jonsson, Haflidi H.

doi:10.1016/s0169-8095(02)00023-6

Cited by 47 publications

(28 citation statements)

References 31 publications

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“…Most components of this package have been described in a number of previ- ous publications (cf. Hegg et al, 2002;Wang et al, 2002) but, perhaps with most relevance to this study, Hegg et al (2004). Recapitulating the portions of these discussions relevant to the current analysis, the PMS/DMT PCASP-100 (size range: 0.12 < d < 3.2 μm) was the primary tool employed for aerosol measurement, the PMS/DMT FSSP-100 and the DMT CAPS probe were used for cloud drop and drizzle drop concentration, respectively, and SST was measured by means of a Heitonics IR thermometer .…”

Section: The Aircraft Platformmentioning

confidence: 99%

Factors influencing the mesoscale variations in marine stratocumulus albedo

Hegg

Nielsen

Covert

et al. 2007

Tellus B: Chemical and Physical Meteorology

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A B S T R A C T Measurements of both horizontal gradients and vertical profiles of aerosols, cloud droplets and thermodynamic parameters in the cloud topped marine boundary layer off of central California are presented. They suggest that, while aerosols can indeed modulate cloud albedo, other parameters such as sea surface temperature may similarly affect cloud albedo. Additionally, the impact of aerosols, through sedimentation and precipitation, on cloud optical depths and thus albedo is not always in accord with conventional expectations and can either enhance or decrease the albedo, depending on ambient conditions. Taken together, these results suggest that current estimates of indirect forcing by aerosols could be significantly in error.

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Section: The Aircraft Platformmentioning

confidence: 99%

Factors influencing the mesoscale variations in marine stratocumulus albedo

Hegg

Nielsen

Covert

et al. 2007

Tellus B: Chemical and Physical Meteorology

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“…Water-soluble DCAs, ketoacids and dicarbonyls have been detected in the marine aerosols and rain water over the western and central Pacific (Kawamura and Usukura, 1993;Sempéré and Kawamura, 1996;Kawamura and Sakaguchi, 1999;Kawamura et al, 2003;Mochida et al, 2003a;Mochida et al, 2003b;Narukawa et al, 2003;Sempéré and Kawamura, 2003). Some DCAs have also been determined in the marine aerosols over the Indian Ocean and Atlantic Ocean (Baboukas et al, 2000;Neusüß et al, 2002), and in the cloud water off central California coast (Hegg et al, 2002). However, their atmospheric concentrations in the marine aerosols over the Southern Ocean have not been reported although they have been measured in the atmospheric aerosols over the Antarctica (Kawamura et al, 1996b).…”

Section: Introductionmentioning

confidence: 99%

Water-Soluble dicarboxylic acids, ketoacids and dicarbonyls in the atmospheric aerosols over the southern ocean and western pacific ocean

2006

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Water-soluble dicarboxylic acids (DCAs), ketoacids, and α-dicarbonyls in the marine aerosol samples collected over the Southern Ocean and western Pacific Ocean were determined. Oxalic acid was the most abundant species, followed by malonic acid and then succinic acid. It is suggested that aerosol concentrations of the organics over the Southern Ocean in this work represent their global background levels. Over the Southern Ocean, total concentrations of DCAs ranged from 2.9 to 7.2 ng m -3 (average: 4.5 ng m in situ photochemical production is more significant over the Southern Ocean although absolute concentrations of the organics are much lower.

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“…Of these experiments, some have reported data on cloud water composition with important findings being that clouds can produce secondary organic aerosol and that the region is rarely pristine but rather influenced by biogenic and anthropogenic sources (Hegg et al, 2002;Crahan et al, 2004;Straub et al, 2007). Due to limited airborne cloud water measurements off the California coast, we intend to report more recent regional data collected between July and August 2011.…”

Section: Introductionmentioning

confidence: 99%