Physical properties of aerosols at Maitri, Antarctica
Measurements of the submicron aerosol size distribution made at the Indian Antarctic station, Maitri (70°45 S, 11°44² E) from January 10th to February 24th, 1997, are reported. Total aerosol concentrations normally range from 800 to 1200 particles cm-3 which are typical values for the coastal stat...
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ftmoes:oai:moeseprints.incois.gov.in:1467 2023-05-15T13:34:17+02:00 Physical properties of aerosols at Maitri, Antarctica Deshpande, CG Kamra, AK 2004 application/pdf http://moeseprints.incois.gov.in/1467/ http://moeseprints.incois.gov.in/1467/1/1201.pdf http://www.ias.ac.in/jess/mar2004/Esb1561.pdf en eng Indian Academy of Science http://moeseprints.incois.gov.in/1467/1/1201.pdf Deshpande, CG and Kamra, AK (2004) Physical properties of aerosols at Maitri, Antarctica. Proceedings of the Indian Academy of Sciences, Earth and Planetary Sciences, 113 (1). pp. 1-25. Meteorology and Climatology Article PeerReviewed 2004 ftmoes 2022-01-12T07:32:46Z Measurements of the submicron aerosol size distribution made at the Indian Antarctic station, Maitri (70°45 S, 11°44² E) from January 10th to February 24th, 1997, are reported. Total aerosol concentrations normally range from 800 to 1200 particles cm-3 which are typical values for the coastal stations at Antarctica in summer. Aerosol size distributions are generally trimodal and open-ended with a peak between 75 and 133 nm and two minima at 42 and 420 nm. Size distributions remain almost similar for several hours or even days in absence of any meteorological disturbance. Total aerosol concentration increases by approximately an order of magnitude whenever a low pressure system passes over the station. Based on the evolution of aerosol size-distributions during such aerosol enhancement periods, three types of cases have been identified. The nucleation mode in all three cases has been suggested to result from the photochemical conversion of the DMS emissions transported either by the marine air or by the air from the ice-melt regions around Maitri. Subsidence of midtropospheric air during the weakening of radiative inversion is suggested as a possible source of the nucleation mode particles in the third case. Growth of the nucleation mode particles by condensation, coagulation and/or by cloud processes has been suggested to be responsible for other modes in size distributions. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ministry of Earth Sciences, Government of India: Open Access Digital Repository Antarctic Indian Maitri ENVELOPE(11.733,11.733,-70.764,-70.764) |
institution |
Open Polar |
collection |
Ministry of Earth Sciences, Government of India: Open Access Digital Repository |
op_collection_id |
ftmoes |
language |
English |
topic |
Meteorology and Climatology |
spellingShingle |
Meteorology and Climatology Deshpande, CG Kamra, AK Physical properties of aerosols at Maitri, Antarctica |
topic_facet |
Meteorology and Climatology |
description |
Measurements of the submicron aerosol size distribution made at the Indian Antarctic station, Maitri (70°45 S, 11°44² E) from January 10th to February 24th, 1997, are reported. Total aerosol concentrations normally range from 800 to 1200 particles cm-3 which are typical values for the coastal stations at Antarctica in summer. Aerosol size distributions are generally trimodal and open-ended with a peak between 75 and 133 nm and two minima at 42 and 420 nm. Size distributions remain almost similar for several hours or even days in absence of any meteorological disturbance. Total aerosol concentration increases by approximately an order of magnitude whenever a low pressure system passes over the station. Based on the evolution of aerosol size-distributions during such aerosol enhancement periods, three types of cases have been identified. The nucleation mode in all three cases has been suggested to result from the photochemical conversion of the DMS emissions transported either by the marine air or by the air from the ice-melt regions around Maitri. Subsidence of midtropospheric air during the weakening of radiative inversion is suggested as a possible source of the nucleation mode particles in the third case. Growth of the nucleation mode particles by condensation, coagulation and/or by cloud processes has been suggested to be responsible for other modes in size distributions. |
format |
Article in Journal/Newspaper |
author |
Deshpande, CG Kamra, AK |
author_facet |
Deshpande, CG Kamra, AK |
author_sort |
Deshpande, CG |
title |
Physical properties of aerosols at Maitri, Antarctica |
title_short |
Physical properties of aerosols at Maitri, Antarctica |
title_full |
Physical properties of aerosols at Maitri, Antarctica |
title_fullStr |
Physical properties of aerosols at Maitri, Antarctica |
title_full_unstemmed |
Physical properties of aerosols at Maitri, Antarctica |
title_sort |
physical properties of aerosols at maitri, antarctica |
publisher |
Indian Academy of Science |
publishDate |
2004 |
url |
http://moeseprints.incois.gov.in/1467/ http://moeseprints.incois.gov.in/1467/1/1201.pdf http://www.ias.ac.in/jess/mar2004/Esb1561.pdf |
long_lat |
ENVELOPE(11.733,11.733,-70.764,-70.764) |
geographic |
Antarctic Indian Maitri |
geographic_facet |
Antarctic Indian Maitri |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
http://moeseprints.incois.gov.in/1467/1/1201.pdf Deshpande, CG and Kamra, AK (2004) Physical properties of aerosols at Maitri, Antarctica. Proceedings of the Indian Academy of Sciences, Earth and Planetary Sciences, 113 (1). pp. 1-25. |
_version_ |
1766051306156326912 |