Aerosol Characteristics Over Maitri-Antarctica and Their Impact on Radiative Forcing.

Access URI: http://npdc.ncaor.gov.in/npdc/search_mf_data.action?search=freeText&expedition_type=all&parameter=MF493213217&userType=user&freeTextValue=Aerosol+Characteristics+Over+Maitri-Antarctica+and+Their+Impact+on+Radiative+Forcing.

Brief Description (Abstract):

During the 20th Indian Antarctic expedition conducted in January-February 2001, a detailed study on the aerosol spectral optical depth, mass concentration and size distribution along with columnar ozone and water vapour concentrations was made from the Indian station, Maitri (70.77? S, 11.73? E) by a single member team of Physical Research Laboratory, Ahmedabad. A low aerosol optical depth of about 0.03 at 400 nm wavelength and a dry aerosol mass concentration of about 7 ug/m3 for the PM,0 particles are found out of which 63% are greater than 1 urn radius. Average columnar ozone and total precipitable water-vapour content during the observation period were found to be 271.6 DU and 0.147 cm respectively. Estimation of aerosol radiative forcing over Maitri reveals a positive forcing of 0.95 W/m2 at the top of the atmosphere and -0.83 W/m2 at the surface.

Status: Completed

Purpose: The objective of the present study is to examine the characteristics of the aerosol particles found in the Antarctic and to estimate their radiative forcing. In the last few decades there has been a considerable increase in anthropogenic activities both in developed and developing nations, which is responsible for an overall increase in the aerosol burden around the globe. Aerosol and radiative-forcing studies over sites such as Antarctica will help in estimating the background-level aerosol forcing over a pristine 66 Harish Gadhavi and A. Jayaraman site, which could be compared with results obtained over polluted regions. Also, such a study helps in establishing a database that could be used in future for studying the long-term impact of continuous human activities in increasing the background-level aerosol concentration.

Presentation Format: Documentdigital

Distribution Format: unknown

Distribution Format Version: unknown

Supplemental Information:

TableDigital

Keyword(s): Earth Science-Atmosphere,

Place/Location(s): Maitri, Antarctic,

Project: Aerosol Characteristics Over Maitri-Antarctica and Their Impact on Radiative Forcing,

Topic Category(s): ClimatologyMeteorologyAtmosphere,

Date(s): 2020-09-29 (Creation),

Resource Contact(s):
1. Name : Dr. Harish Gadhavi
    Role : PrincipalInvestigator
    Phone : 8322525515
    E-Mail : ictd [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Distributor Contact(s):
1. Name : Mr. Sakthivel Samy V
    Role : Distributor
    Phone : +91-832-2525515
    E-Mail : vssamy [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Metadata Contact(s):
1. Name : Mr. Sakthivel Samy V
    Role : PointOfContact
    Phone : +91-832-2525515
    E-Mail : vssamy [ at ] ncpor.res.in
    Organization Name : National Centre for Polar and Ocean Research (NCPOR)
    Address : Headland Sada, Vasco da Gama, Goa 403804
    City : Vasco-da-Gama
    State : Goa
    Postal Code : 403804
    Country : IND

Extent:
Start Date : 2000-01-01
End Date   : 2001-12-31