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Improving Our Understanding of High-Latitude Tropospheric Marine Aerosols Using NASA Earth-Observing Satellites and the Biogeochemical Southern Ocean State Estimate (B-SOSE).

Record Type:	Electronic resources : Monograph/item
Title/Author:	Improving Our Understanding of High-Latitude Tropospheric Marine Aerosols Using NASA Earth-Observing Satellites and the Biogeochemical Southern Ocean State Estimate (B-SOSE)./
Author:	Dasarathy, Srishti.
Description:	1 online resource (166 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
Contained By:	Dissertations Abstracts International85-01B.
Subject:	Biological oceanography. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30310952click for full text (PQDT)
ISBN:	9798379781309

Improving Our Understanding of High-Latitude Tropospheric Marine Aerosols Using NASA Earth-Observing Satellites and the Biogeochemical Southern Ocean State Estimate (B-SOSE).
Dasarathy, Srishti.

Improving Our Understanding of High-Latitude Tropospheric Marine Aerosols Using NASA Earth-Observing Satellites and the Biogeochemical Southern Ocean State Estimate (B-SOSE). - 1 online resource (166 pages)

Source: Dissertations Abstracts International, Volume: 85-01, Section: B.

Thesis (Ph.D.)--University of California, San Diego, 2023.

Includes bibliographical references

Tropospheric marine aerosol presence in the western Antarctic is coupled to physical and biological processes. These aerosols may be biogenic, formed from the activity of primary producers, and can be associated with seasonal dynamics of sea ice melt and phytoplankton blooms. These aerosols may also influence local environments of polar regions by absorbing and scattering solar radiation and by initiating cloud formation. To study tropospheric marine aerosol in the remote marine Bellingshausen Sea environment, we used a specialized instrument onboard the NASA Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) capable of detecting the presence of aerosols at altitudes close to the sea surface. We termed this measurement marine aerosol optical depth (MAOD). To further support these observations, we also examined coarse-mode aerosol optical depth (AODC), often used as a proxy for sea spray aerosol (SSA). We used MAOD and AODC to examine trends in marine tropospheric aerosol and undertook a multi-year remote sensing analysis in the Bellingshausen Sea from 2006-2018.Across open ocean to coastal regions, daily fluctuations in nighttime and daytime winds, respectively, drove increasing MAOD and AODC. MAOD depicted strong correlations with wind speed across the open ocean and weak correlations in coastal regions, suggesting that daily fluxes in wind speed drive the production of SSA. In the open ocean, we further observed that warmer SST enhanced AODC and the associated production of SSA, supporting prior studies. We also observed seasonal increases in MAOD alongside a seasonal increase in chl-a and the melt of sea ice; these patterns suggest that biological activity of primary producers likely contributed towards magnitudes of marine tropospheric aerosol. This work is also the first to distinguish a late winter to early spring temporal MAOD signal, likely tied to an aerosol source from either venting of biogenic aerosol from breaks in sea ice or to the production of SSA resulting from pulses in wind speed. Our work extends upon previous findings of marine aerosol in polar environments and more fully characterizes interactions during polar winter.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798379781309Subjects--Topical Terms:

2122748
Biological oceanography.
Subjects--Index Terms:

Aerosol optical depthIndex Terms--Genre/Form:

542853
Electronic books.

Improving Our Understanding of High-Latitude Tropospheric Marine Aerosols Using NASA Earth-Observing Satellites and the Biogeochemical Southern Ocean State Estimate (B-SOSE).
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245 1 0 $a Improving Our Understanding of High-Latitude Tropospheric Marine Aerosols Using NASA Earth-Observing Satellites and the Biogeochemical Southern Ocean State Estimate (B-SOSE).
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300 $a 1 online resource (166 pages)
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500 $a Source: Dissertations Abstracts International, Volume: 85-01, Section: B.
500 $a Advisor: Bowman, Jeff.
502 $a Thesis (Ph.D.)--University of California, San Diego, 2023.
504 $a Includes bibliographical references
520 $a Tropospheric marine aerosol presence in the western Antarctic is coupled to physical and biological processes. These aerosols may be biogenic, formed from the activity of primary producers, and can be associated with seasonal dynamics of sea ice melt and phytoplankton blooms. These aerosols may also influence local environments of polar regions by absorbing and scattering solar radiation and by initiating cloud formation. To study tropospheric marine aerosol in the remote marine Bellingshausen Sea environment, we used a specialized instrument onboard the NASA Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) capable of detecting the presence of aerosols at altitudes close to the sea surface. We termed this measurement marine aerosol optical depth (MAOD). To further support these observations, we also examined coarse-mode aerosol optical depth (AODC), often used as a proxy for sea spray aerosol (SSA). We used MAOD and AODC to examine trends in marine tropospheric aerosol and undertook a multi-year remote sensing analysis in the Bellingshausen Sea from 2006-2018.Across open ocean to coastal regions, daily fluctuations in nighttime and daytime winds, respectively, drove increasing MAOD and AODC. MAOD depicted strong correlations with wind speed across the open ocean and weak correlations in coastal regions, suggesting that daily fluxes in wind speed drive the production of SSA. In the open ocean, we further observed that warmer SST enhanced AODC and the associated production of SSA, supporting prior studies. We also observed seasonal increases in MAOD alongside a seasonal increase in chl-a and the melt of sea ice; these patterns suggest that biological activity of primary producers likely contributed towards magnitudes of marine tropospheric aerosol. This work is also the first to distinguish a late winter to early spring temporal MAOD signal, likely tied to an aerosol source from either venting of biogenic aerosol from breaks in sea ice or to the production of SSA resulting from pulses in wind speed. Our work extends upon previous findings of marine aerosol in polar environments and more fully characterizes interactions during polar winter.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Biological oceanography. $3 2122748
650 4 $a Marine geology. $3 3173821
650 4 $a Remote sensing. $3 535394
653 $a Aerosol optical depth
653 $a Marine aerosol
653 $a NASA CALIPSO
653 $a NASA MODIS
653 $a Southern ocean
653 $a Western Antarctic
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710 2 $a University of California, San Diego. $b Scripps Institution of Oceanography. $3 3543449
773 0 $t Dissertations Abstracts International $g 85-01B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=30310952 $z click for full text (PQDT)