Size distribution of atmospheric aerosols at Maitri, Antarctica
Measurements of the concentration and size distribution of the atmospheric aerosol particles in the size range of 0.003–20 μm diameter have been made at Maitri (70°45′52″S, 11°44′03″E) during January–February, 2005. The measured particle size ranges extended from 0.5 to 20 μm throughout the period,...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Elsevier
2011
|
Subjects: | |
Online Access: | http://moeseprints.incois.gov.in/672/ http://www.sciencedirect.com/science/article/pii/S1352231011006212 |
id |
ftmoes:oai:moeseprints.incois.gov.in:672 |
---|---|
record_format |
openpolar |
spelling |
ftmoes:oai:moeseprints.incois.gov.in:672 2023-05-15T13:34:17+02:00 Size distribution of atmospheric aerosols at Maitri, Antarctica Pant, V Siingh, D Kamra, AK 2011-06 http://moeseprints.incois.gov.in/672/ http://www.sciencedirect.com/science/article/pii/S1352231011006212 unknown Elsevier Pant, V and Siingh, D and Kamra, AK (2011) Size distribution of atmospheric aerosols at Maitri, Antarctica. Atmospheric Environment, 45 (29). pp. 5138-5149. Meteorology and Climatology Article PeerReviewed 2011 ftmoes 2022-01-12T07:31:23Z Measurements of the concentration and size distribution of the atmospheric aerosol particles in the size range of 0.003–20 μm diameter have been made at Maitri (70°45′52″S, 11°44′03″E) during January–February, 2005. The measured particle size ranges extended from 0.5 to 20 μm throughout the period, from 0.016 to 0.7 μm in January and 0.01 to 0.4 μm in February. For short intervals of time, comprising a total period of 210 h, the measurements were made for particles in the size range of 0.003–0.16 μm. Total particle number concentrations of coarse and fine particles vary from 0.1 to 0.8 and from 100 to 2000 particles cm−3, respectively. The fine particle concentration undergoes a diurnal variation with values remaining low (300–400 cm−3) during low sun periods and increasing up to ∼750 cm−3 at noontime. The monthly-averaged number size distributions show maxima in accumulation mode at 0.772 ± 0.023 μm, in Aitken mode at 0.089 ± 0.005 μm in January which shifts to 0.03 ± 0.003 μm in February, and in nucleation mode at 0.018 ± 0.002 μm. The hourly-averaged curves can have one mode each in coarse, accumulation, and nucleation size ranges, and two modes in Aitken size range of particles. Total number concentration of particles in coarse mode is higher in oceanic than in continental air masses. Further, while the oceanic air masses have nucleation mode at 0.01 μm and Aitken mode at 0.024 μm, continental air masses have nucleation mode at 0.017 μm. Intermixing of the two air masses at coastal site results in multi-modal size distributions. It is inferred that while in continental air masses the nucleation mode particles are aged, in oceanic air masses these are likely to be transported from the upper troposphere under subsidence of cyclonic storms revolving around the continent of Antarctica Article in Journal/Newspaper Antarc* Antarctica Ministry of Earth Sciences, Government of India: Open Access Digital Repository Aitken ENVELOPE(-44.516,-44.516,-60.733,-60.733) 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 |
unknown |
topic |
Meteorology and Climatology |
spellingShingle |
Meteorology and Climatology Pant, V Siingh, D Kamra, AK Size distribution of atmospheric aerosols at Maitri, Antarctica |
topic_facet |
Meteorology and Climatology |
description |
Measurements of the concentration and size distribution of the atmospheric aerosol particles in the size range of 0.003–20 μm diameter have been made at Maitri (70°45′52″S, 11°44′03″E) during January–February, 2005. The measured particle size ranges extended from 0.5 to 20 μm throughout the period, from 0.016 to 0.7 μm in January and 0.01 to 0.4 μm in February. For short intervals of time, comprising a total period of 210 h, the measurements were made for particles in the size range of 0.003–0.16 μm. Total particle number concentrations of coarse and fine particles vary from 0.1 to 0.8 and from 100 to 2000 particles cm−3, respectively. The fine particle concentration undergoes a diurnal variation with values remaining low (300–400 cm−3) during low sun periods and increasing up to ∼750 cm−3 at noontime. The monthly-averaged number size distributions show maxima in accumulation mode at 0.772 ± 0.023 μm, in Aitken mode at 0.089 ± 0.005 μm in January which shifts to 0.03 ± 0.003 μm in February, and in nucleation mode at 0.018 ± 0.002 μm. The hourly-averaged curves can have one mode each in coarse, accumulation, and nucleation size ranges, and two modes in Aitken size range of particles. Total number concentration of particles in coarse mode is higher in oceanic than in continental air masses. Further, while the oceanic air masses have nucleation mode at 0.01 μm and Aitken mode at 0.024 μm, continental air masses have nucleation mode at 0.017 μm. Intermixing of the two air masses at coastal site results in multi-modal size distributions. It is inferred that while in continental air masses the nucleation mode particles are aged, in oceanic air masses these are likely to be transported from the upper troposphere under subsidence of cyclonic storms revolving around the continent of Antarctica |
format |
Article in Journal/Newspaper |
author |
Pant, V Siingh, D Kamra, AK |
author_facet |
Pant, V Siingh, D Kamra, AK |
author_sort |
Pant, V |
title |
Size distribution of atmospheric aerosols at Maitri, Antarctica |
title_short |
Size distribution of atmospheric aerosols at Maitri, Antarctica |
title_full |
Size distribution of atmospheric aerosols at Maitri, Antarctica |
title_fullStr |
Size distribution of atmospheric aerosols at Maitri, Antarctica |
title_full_unstemmed |
Size distribution of atmospheric aerosols at Maitri, Antarctica |
title_sort |
size distribution of atmospheric aerosols at maitri, antarctica |
publisher |
Elsevier |
publishDate |
2011 |
url |
http://moeseprints.incois.gov.in/672/ http://www.sciencedirect.com/science/article/pii/S1352231011006212 |
long_lat |
ENVELOPE(-44.516,-44.516,-60.733,-60.733) ENVELOPE(11.733,11.733,-70.764,-70.764) |
geographic |
Aitken Maitri |
geographic_facet |
Aitken Maitri |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Pant, V and Siingh, D and Kamra, AK (2011) Size distribution of atmospheric aerosols at Maitri, Antarctica. Atmospheric Environment, 45 (29). pp. 5138-5149. |
_version_ |
1766051277683294208 |