The impact of lateral advection on SST and SSS in the northern Bay of Bengal during 2015

Buckley, Jared; Mingels, Brian; Tandon, Amit

doi:10.1016/j.dsr2.2019.104653

Cited by 12 publications

(15 citation statements)

References 27 publications

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“…For instance, the absence of a salinification event (∼0.03 psu) between 1800 and 2400 LST in the CTRL run compared to observations is likely associated with the absence of a horizontal and vertical advection processes in the ocean model (Figures 7f and 7h). Note that the cold bias in the CTRL run is comparable in magnitude to earlier studies based on the PWP model in the BoB (Buckley et al., 2019; Chaudhuri et al., 2019; Navaneeth et al., 2019; Weller et al., 2016)…”

Section: Resultssupporting

confidence: 83%

“…In addition, ζ 2 estimated by an 8‐days composite of chlorophyll data at a spatial resolution of 5 km from Moderate Resolution Imaging Spectroradiometer (MODIS) onboard Aqua satellite from January 2003 to March 2020 using the expression ( ζ 2 = [0.027 + 0.0518* chlorophyll 0.428 ] −1 ) proposed by Morel (1988) shows a mean value around 19.9 ± 0.02 m at 15°N, 90°E in the BoB. The choice of these parameters is important to accurately simulate SST in an ocean model (Buckley et al., 2019; Kantha et al., 2019). However, the main goal of our study is to explore the sensitivity for SST responses to ACPs under different initial conditions and forcing scenarios, so the exact choice of parameters to estimate the Q pen in the model is not critical to understanding our results.…”

Section: Methodsmentioning

confidence: 99%

“…For example, Buckley et al. (2019) discussed the importance of horizontal freshwater and heat advection in simulating seasonal variability of sea surface salinity and SST. However, we hope to gain some physical insight on how one‐dimensional processes operate on the short time scale of ACP events to impact SST.…”

Section: Methodsmentioning

confidence: 99%

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Atmospheric Cold Pools and Their Influence on Sea Surface Temperature in the Bay of Bengal

et al. 2021

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Recent observations show that atmospheric cold pool (ACP) events are plentiful in the Bay of Bengal (BoB) during summer (May–September) and fall (October–November) and that these events can significantly modify local air‐sea interaction processes on sub‐daily time scales. In this study, we examine whether the magnitude of sea surface temperature (SST) drop associated with ACP events shows any diurnal variability during summer and fall. For this purpose, we use moored buoy data with a 10‐min temporal resolution at 8°, 12°, and 15°N along 90°E and a one‐dimensional mixed layer (ML) model. The analysis shows a reduction in SST (ΔSST) due to ACPs in the BoB during summer and fall, with a maximum magnitude of ΔSST during the afternoon (1200–1600 LST). However, the maximum magnitude of ΔSST during the afternoon is a factor of two higher during fall (∼−0.14°C) than summer (∼−0.07°C). Analysis based on observations and ACP sensitivity experiments indicates that the shallow daytime thermocline and associated thin surface ML is the primary factor regulating the day to night difference in ΔSST associated with ACPs. The presence of this shallow daytime thermocline and thin ML amplifies the effects on SST of net surface heat loss and entrainment of cold sub‐surface water associated with enhanced ACP wind speeds.

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Section: Resultssupporting

confidence: 83%

Section: Methodsmentioning

confidence: 99%

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Atmospheric Cold Pools and Their Influence on Sea Surface Temperature in the Bay of Bengal

et al. 2021

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“…In addition, the highly dynamic nature and the role of multiple factors affecting SSTs make it difficult to explore these relationships, if any. Some of the factors affecting SSTs are solar insolation, warm/cold water advection, and other marine processes, namely ocean currents, upwelling/downwelling phenomena, and eddies (Leeuwenburgh and Stammer, 2001;Shinoda, 2005;Krishna, 2008;Mandal et al, 2019;Buckley et al, 2020). In addition, the BoB also receives a sizable freshwater influx from the rivers and undergoes near-surface ocean-atmosphere interactions, which alters the upper ocean processes (Parampil et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Aerosol Induced Changes in Sea Surface Temperature Over the Bay of Bengal Due to COVID-19 Lockdown

et al. 2021

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The role of COVID-19 pandemic lockdown in improving air quality was reported extensively for land regions globally. However, limited studies have explored these over oceanic areas close to high anthropogenic activities and emissions. The Bay of Bengal (BoB) basin is one such region adjacent to the highly populated South Asian region. We find that Aerosol Optical Depth (AOD) over the BoB declined by as much as 0.1 or 30% during the peak lockdown of April 2020 compared to long-term climatology during 2003–2019. Simultaneously, the sea surface temperature (SST) rose by 0.5–1.5°C over the central and north-western parts of the BoB with an average increase of 0.83°C. We show that up to 30% of this observed warming is attributable to reduced atmospheric aerosols. The study highlights the importance of anthropogenic emissions reduction due to COVID lockdown on short-term changes to SST over ocean basins with implications to regional weather.

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“…Journal of Geophysical Research: Oceans salinity mixed layer in the north BoB favors 30-40 day SST oscillations with peak-to-peak amplitudes often reaching 2-3°C. The SST oscillations are mainly a response to alternating positive and negative net surface heat flux (typically +80 to −80 Wm −2 ) associated with the active-break cycles of the summer monsoon (Parampil et al, 2016;Sengupta & Ravichandran, 2001;Vialard et al, 2012), with a more modest contribution from lateral advection (Buckley et al, 2020). From spectral analysis of Tropical Rainfall Measuring Mission Microwave Imager (TMI) SST during the summer monsoon season, Parekh et al (2004) found a dominant 30-60 day mode, and a secondary 8-16 day mode of variability in the BoB.…”

mentioning

confidence: 99%

Quasi‐Biweekly Mode of the Asian Summer Monsoon Revealed in Bay of Bengal Surface Observations

et al. 2020

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The impact of lateral advection on SST and SSS in the northern Bay of Bengal during 2015

Cited by 12 publications

References 27 publications

Atmospheric Cold Pools and Their Influence on Sea Surface Temperature in the Bay of Bengal

Atmospheric Cold Pools and Their Influence on Sea Surface Temperature in the Bay of Bengal

Aerosol Induced Changes in Sea Surface Temperature Over the Bay of Bengal Due to COVID-19 Lockdown

Quasi‐Biweekly Mode of the Asian Summer Monsoon Revealed in Bay of Bengal Surface Observations

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