Aerosol optical depth, physical properties and radiative forcing over the Arabian Sea

被引：0

作者：

S. K. Satheesh

K. Krishna Moorthy

Y. J. Kaufman

T. Takemura

机构：

[1] Centre for Atmospheric and Oceanic Sciences,

[2] Indian Institute of Science,undefined

[3] Space Physics Laboratory,undefined

[4] Vikram Sarabhai Space Centre,undefined

[5] Climate and Radiation Branch,undefined

[6] NASA/Goddard SFC,undefined

[7] NASA/GSFC,undefined

[8] Research Institute for Applied Mechanics,undefined

[9] Kyushu University,undefined

来源：

Meteorology and Atmospheric Physics | 2006年 / 91卷

关键词：

Monsoon Season; Aerosol Optical Depth; Size Regime; Significant Seasonal Variation; Summer Monsoon Season;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The Arabian Sea region (4° N–20° N to 50° E–78° E) has a unique weather pattern on account of the Indian monsoon and the associated winds that reverse direction seasonally. The aerosol data, collected using ship-borne and island platforms (for 8 years from 1995 to 2002) along with MODIS (onboard TERRA satellite) data (from 2000 to 2003) have been used to evolve a comprehensive characterisation of the spatial and temporal variation in the physical, chemical, and radiative properties of aerosols over the Arabian Sea. The aerosol optical depth (AOD) was found to increase with latitude between the equator and 12° N. Over the northern Arabian Sea (regions lying north of 12° N), AODs do not show significant latitudinal variations; the average aerosol optical depth for this region was 0.29±0.12 during winter monsoon season (WMS; November to March) and 0.47±0.14 during summer monsoon season (SMS; April/May to September). The corresponding Angstrom exponents were 0.7±0.12 and 0.3±0.08, respectively. The low values of the exponent during SMS indicate the dominance of large aerosols (mainly dust particles >1 µm). The latitudinal gradient in AOD in the southern Arabian Sea is larger during SMS compared to WMS.

引用

页码：45 / 62

页数：17

共 245 条

[1]

Angstrom A(1964)Techniques of determining the turbidity of the atmosphere. Tellus 13 214-16318

[2]

Babu SS(2002)Aerosol black carbon over a tropical coastal station in India. Geophys Res Lett 29 2098-272

[3]

Moorthy KK(2002)Aerosol radiative forcing due to enhanced black carbon at an urban site in India. Geophys Res Lett 29 1880-16998

[4]

Babu SS(2002)Regional marine boundary layer aerosol size distributions in the Indian, Atlantic, and Pacific Oceans: A comparison of INDOEX measurements with ACE-1, ACE-2, and Aerosols99. J Geophys Res 107 8026-1106

[5]

Satheesh SK(1998)International Global Atmospheric Chemistry (IGAC) project’s first aerosol characterization experiment (ACE 1): Overview. J Geophys Res 103 16297-1434

[6]

Moorthy KK(2000)Aerosol physical properties and processes in the lower marine boundary layer: A comparison of shipboard sub-micron data from ACE-1 and ACE-2. Tellus Sr B 52 258-163

[7]

Bates TS(1998)Intercomparison of models representing direct shortwave radiative forcing by sulfate aerosols. J Geophys Res 103 16979-430

[8]

Coffman DJ(2000)Estimation of the aerosol perturbation to the Earth’s radiative budget over oceans using POLDER satellite aerosol retrievals. Geophys Res Lett 27 1103-4453

[9]

Covert DS(2004)Impact of anthropogenic absorbing aerosols on the simulation of climate during pre-monsoon and monsoon seasons in NCMRWF GCM. Ann Geophys 22 1421-1692

[10]

Quinn PK(1991)Perturbation of the Northern Hemisphere radiative balance by backscattering from anthropogenic sulfate aerosols. Tellus 43AB 152-138

← 1 2 3 4 5 6 7 8 9 10 →