TY - JOUR
T1 - Distribution, input pathway and mass inventory of black carbon in sediments of the Gulf of Thailand, SE Asia
AU - Hu, Limin
AU - Shi, Xuefa
AU - Bai, Yazhi
AU - Fang, Yin
AU - Chen, Yingjun
AU - Qiao, Shuqing
AU - Liu, Shengfa
AU - Yang, Gang
AU - Kornkanitnan, Narumol
AU - Khokiattiwong, Somkiat
N1 - Publisher Copyright:
© 2015 Elsevier Ltd.
PY - 2016/3/5
Y1 - 2016/3/5
N2 - The coastal margins around Southeast Asia (SE Asia) may serve as an ideal location to study the source-sink process of sedimentary black carbon (BC) because SE Asia has been identified as one of the major BC emission source regions in the world. This study provides an extensive picture of recent regional-scale sedimentary BC sequestration in the Gulf of Thailand (GOT), a tropical marine system in SE Asia. Generally, the sedimentary BC concentrations (0.07-3.99 mg/g) were in the low to moderate ranges of those obtained in other coastal sediments around the world. Regional variability of the BC and its correlation with the sediment grain size and total organic carbon (TOC) content indicated a general hydrodynamic constraint on BC occurrence in the lower Gulf in contrast to the upper Gulf with a more source dependence due to the direct land-based input. BC/TOC% values and the varied BC components (char and soot), as well as their correlations suggested that char was the predominant constituents of sedimentary BC both in the upper and lower Gulf, which could be mainly derived from biomass burning and entered into the nearshore region through direct fluvial transport and surface run-off. The estimated BC burial flux (~212 μg/cm2/y) and mass inventory (~200 Gg/y) in the GOT on the hundred-year timescale were of the same order of magnitude compared with other oceanic margins, and thus the tropical shelf sediments from SE Asia could serve as an important sink of land-emitted BC.
AB - The coastal margins around Southeast Asia (SE Asia) may serve as an ideal location to study the source-sink process of sedimentary black carbon (BC) because SE Asia has been identified as one of the major BC emission source regions in the world. This study provides an extensive picture of recent regional-scale sedimentary BC sequestration in the Gulf of Thailand (GOT), a tropical marine system in SE Asia. Generally, the sedimentary BC concentrations (0.07-3.99 mg/g) were in the low to moderate ranges of those obtained in other coastal sediments around the world. Regional variability of the BC and its correlation with the sediment grain size and total organic carbon (TOC) content indicated a general hydrodynamic constraint on BC occurrence in the lower Gulf in contrast to the upper Gulf with a more source dependence due to the direct land-based input. BC/TOC% values and the varied BC components (char and soot), as well as their correlations suggested that char was the predominant constituents of sedimentary BC both in the upper and lower Gulf, which could be mainly derived from biomass burning and entered into the nearshore region through direct fluvial transport and surface run-off. The estimated BC burial flux (~212 μg/cm2/y) and mass inventory (~200 Gg/y) in the GOT on the hundred-year timescale were of the same order of magnitude compared with other oceanic margins, and thus the tropical shelf sediments from SE Asia could serve as an important sink of land-emitted BC.
KW - Black carbon
KW - Continental shelf sediments
KW - Gulf of Thailand
KW - Input pathway
KW - Mass inventories
KW - SE Asia
UR - https://www.scopus.com/pages/publications/84952898225
U2 - 10.1016/j.ecss.2015.12.019
DO - 10.1016/j.ecss.2015.12.019
M3 - 文章
AN - SCOPUS:84952898225
SN - 0272-7714
VL - 170
SP - 10
EP - 19
JO - Estuarine, Coastal and Shelf Science
JF - Estuarine, Coastal and Shelf Science
ER -
