Dust induced radiative perturbations during an episode of long-range dust transport over Delhi, India: a high-resolution regional NWP model study

Francis, Timmy; Jayakumar, A.; Sethunadh, Jisesh; Mohandas, Saji; Kumar, Sumit; Rajagopal, E. N.

doi:10.1007/s00703-020-00760-3

Cited by 2 publications

(3 citation statements)

References 98 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This shows that haze events affect airborne bacterial diversity, which encompasses both normal airborne bacteria and bacteria accompanied by haze pollutants. Most of the identified bacterial species were from the phylum Proteobacteria [6] followed by the Firmicutes [5] and Bacteroidetes [1]. This observation can be supported by the fact that Proteobacteria are the most abundant phyla during haze events [23,24] (Supplementary Table 2).…”

Section: Resultsmentioning

confidence: 65%

See 1 more Smart Citation

Impact of haze events on airborne bacterial consortia–a case study

et al. 2021

View full text Add to dashboard Cite

Transboundary haze events received a noticeable attention recently, due to their frequent occurrences. They are mainly, consequences of anthropogenic activities. Sri Lanka experienced a haze event parallel to India in November 2019, the first air pollution event in Sri Lanka linked to a haze event in India. Due to the limited availability of information on haze-related microorganisms, we conducted this study in Kandy, Sri Lanka, aiming to explore the airborne bacterial consortia during a haze event. The natural sedimentation method was used for air sampling. Bacterial identification and the total bacterial load were determined using Sanger sequencing and qPCR. Notably, the total bacterial load was elevated by ~ 40% with the haze and decreased with decreasing haze intensity. The highest bacterial load was reported during the day time of the most intense hazy day (1.89 × 106 cells/µl) compared to non-hazy days (lowest; 1.12 × 105 cells/µl). Twelve bacterial species were identified and the most abundant phylum was Proteobacteria. The most common species observed during haze was Acinetobacter modestus. The percentage of culturable bacterial species was also high during the haze event (75% during day time of the most intense hazy day compared to 25% on the control). Two human pathogenic bacteria Burkholderia multivorans and Chryseobacterium gleum were found only during the haze event. Therefore, haze events could be hazardous to humans by means of the presence and fluctuating amounts of pathogenic bacteria. Thus, these findings are important in developing policies and guidelines to monitor and minimize the negative impact of haze events.

show abstract

Section: Resultsmentioning

confidence: 65%

“…There is evidence that forest fires in Sumatra had links to the September 2019 haze event in Malaysia [5]. Similarly, Saudi Arabian dust storms also are known to have associations with haze events in India [6]. Such an event occurred in 2015 and resulted in 100,000 premature deaths across Indonesia, Malaysia and Singapore [7].…”

Section: Introductionmentioning

confidence: 99%

Impact of haze events on airborne bacterial consortia–a case study

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In the complex mixture of aerosols in the earth's atmosphere, mineral dust of natural origin is most abundant by mass in the troposphere next to the sea salt aerosols 1 . Having an average lifetime of ~ 2.8 days 2 in the atmosphere, mineral dust plays a crucial role in air quality 3 , human health 4 , terrestrial and oceanic biogeochemical cycle 5 , cloud lifecycles and monsoon precipitation 6 – 8 , and radiative forcing 9 in the near and far off locations. On a global scenario, the Middle East and North Africa regions are the most active natural dust source regions 10 , contributing up to 80% of the global dust burden 2 .…”

Section: Introductionmentioning

confidence: 99%

On the net primary productivity over the Arabian Sea due to the reduction in mineral dust deposition

Gogoi

Kotalo

Babu

2022

Sci Rep

View full text Add to dashboard Cite

The dust plume tracks from the Middle East and Eastern Africa to the Indian subcontinent have an impact on the atmospheric and ocean biogeochemistry of the Arabian Sea (AS). Here, we present the impact of dust on net primary productivity (NPP) over the AS using satellite-based observation and model simulation. Seasonal episodes and long-term trends in dust optical depth (DOD), dust mass flux (DMF) and dust deposition flux (DDF) from 2007 to 2020 are quantified. Nearly 32% of the total dust is advected to the AS during transport (maximum in JJA; DMF ~ 33.1 Tg year−1 ~ 56% of annual and DDF ~ 5.5 Tg year−1 ~ 63% of annual). Over the last one and half decades, there has been a statistically significant decreasing trend in DOD, associated with precipitation, enhanced vegetation index and surface soil moisture over the landmasses in the proximity of the AS. Similarly, the depletion in DDF suppresses the NPP over different regions of the AS, especially over the central AS, where the oceanic supply of nutrients is limited.

show abstract

Dust induced radiative perturbations during an episode of long-range dust transport over Delhi, India: a high-resolution regional NWP model study

Cited by 2 publications

References 98 publications

Impact of haze events on airborne bacterial consortia–a case study

Impact of haze events on airborne bacterial consortia–a case study

On the net primary productivity over the Arabian Sea due to the reduction in mineral dust deposition

Contact Info

Product

Resources

About