Author responses to the review of Referee #2 (anonymous) for the Biogeosciences manuscript bg2020-162: "A comparison of bacterial communities from OMZ sediments in the Arabian Sea and the Bay of Bengal reveals major differences in nitrogen turnover and ca

Abstract Composites of Florida State University winds (1970–99) for four different climate scenarios are used to force an Indian Ocean model. In addition to the mean climatology, the cases include La Niña, El Niño, and the Indian Ocean dipole (IOD). The differences in upper-ocean water mass exchanges between the Arabian Sea and the Bay of Bengal are investigated and show that, during El Niño and IOD years, the average clockwise Indian Ocean circulation is intensified, while it is weakened during La Niña years. As a consequence, high-salinity water export from the Arabian Sea into the Bay of Bengal is enhanced during El Niño and IOD years, while transport of low-salinity waters from the Bay of Bengal into the Arabian Sea is enhanced during La Niña years. This provides a venue for interannual salinity variations in the northern Indian Ocean.

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Seasonal and Interannual Sea Surface Temperature Variability in the Coastal Cities of Arabian Sea and Bay of Bengal

Natural Hazards ◽

10.1023/b:nhaz.0000023367.66009.1d ◽

2004 ◽

Vol 31 (2) ◽

pp. 549-560 ◽

Cited By ~ 11

Author(s):

Tariq Masood Ali Khan ◽

Dewan Abdul Quadir ◽

Tad S. Murty ◽

Majajul Alam Sarker

Keyword(s):

Surface Temperature ◽

Sea Surface Temperature ◽

Bay Of Bengal ◽

Arabian Sea ◽

Temperature Variability ◽

Sea Surface ◽

Coastal Cities

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Change in the intensity of low-salinity water inflow from the Bay of Bengal into the Eastern Arabian Sea from the Last Glacial Maximum to the Holocene: Implications for monsoon variations

Palaeogeography Palaeoclimatology Palaeoecology ◽

10.1016/j.palaeo.2013.05.024 ◽

2014 ◽

Vol 397 ◽

pp. 31-37 ◽

Cited By ~ 16

Author(s):

B.S. Mahesh ◽

V.K. Banakar

Keyword(s):

Last Glacial Maximum ◽

Bay Of Bengal ◽

Arabian Sea ◽

The Holocene ◽

Low Salinity ◽

Low Salinity Water ◽

Eastern Arabian Sea ◽

Salinity Water ◽

The Last Glacial Maximum ◽

The Last Glacial

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Seven year satellite observations of the mean structures and variabilities in the regional aerosol distribution over the oceanic areas around the Indian subcontinent

Annales Geophysicae ◽

10.5194/angeo-23-2011-2005 ◽

2005 ◽

Vol 23 (6) ◽

pp. 2011-2030 ◽

Cited By ~ 24

Author(s):

S. K. Nair ◽

K. Parameswaran ◽

K. Rajeev

Keyword(s):

Indian Ocean ◽

Southern Hemisphere ◽

Bay Of Bengal ◽

Arabian Sea ◽

Indian Subcontinent ◽

Monsoon Season ◽

Dry Season ◽

Aerosol Transport ◽

Summer Monsoon Season ◽

Aerosol Distribution

Abstract. Aerosol distribution over the oceanic regions around the Indian subcontinent and its seasonal and interannual variabilities are studied using the aerosol optical depth (AOD) derived from NOAA-14 and NOAA-16 AVHRR data for the period of November 1995–December 2003. The air-mass types over this region during the Asian summer monsoon season (June–September) are significantly different from those during the Asian dry season (November–April). Hence, the aerosol loading and its properties over these oceanic regions are also distinctly different in these two periods. During the Asian dry season, the Arabian Sea and Bay of Bengal are dominated by the transport of aerosols from Northern Hemispheric landmasses, mainly the Indian subcontinent, Southeast Asia and Arabia. This aerosol transport is rather weak in the early part of the dry season (November–January) compared to that in the later period (February–April). Large-scale transport of mineral dust from Arabia and the production of sea-salt aerosols, due to high surface wind speeds, contribute to the high aerosol loading over the Arabian Sea region during the summer monsoon season. As a result, the monthly mean AOD over the Arabian Sea shows a clear annual cycle with the highest values occurring in July. The AOD over the Bay of Bengal and the Southern Hemisphere Indian Ocean also displays an annual cycle with maxima during March and October, respectively. The amplitude of the annual variation is the largest in coastal Arabia and the least in the Southern Hemisphere Indian Ocean. The interannual variability in AOD is the largest over the Southeast Arabian Sea (seasonal mean AOD varies from 0.19 to 0.42) and the northern Bay of Bengal (seasonal mean AOD varies from 0.24 to 0.39) during the February–April period and is the least over the Southern Hemisphere Indian Ocean. This study also investigates the altitude regions and pathways of dominant aerosol transport by combining the AOD distribution with the atmospheric circulation. Keywords. Atmospheric composition and structure (Aerosols and particles) – Meteorology and atmospheric dynamics (Climatology) – Oceanography: physical (Ocean fog and aerosols)

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