TY - JOUR
T1 - Chromophoric dissolved organic matter in inland waters
T2 - Present knowledge and future challenges
AU - Zhang, Yunlin
AU - Zhou, Lei
AU - Zhou, Yongqiang
AU - Zhang, Liuqing
AU - Yao, Xiaolong
AU - Shi, Kun
AU - Jeppesen, Erik
AU - Yu, Qian
AU - Zhu, Weining
N1 - Funding Information:
This study was jointly funded by the National Natural Science Foundation of China (grants 41930760 , 41621002 , 41771514 , and 41807362 ) and Water Resource Science and Technology Project in Jiangsu Province ( 2020057 ). EJ was supported by the TÜBITAK , BIDEB 2232 program ( 118C250 ). We would like to thank Kanshan Song and Stefan Simis for their CDOM data in USA and Netherland. We would like to express our gratitude to the four anonymous reviewers and the associate editor for their critical and constructive comments.
Publisher Copyright:
© 2020 Elsevier B.V.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2021/3
Y1 - 2021/3
N2 - Chromophoric dissolved organic matter (CDOM) plays an important role in the biogeochemical cycle and energy flow of aquatic ecosystems. Thus, systematic and comprehensive understanding of CDOM dynamics is critically important for aquatic ecosystem management. CDOM spans multiple study fields, including analytical chemistry, biogeochemistry, water color remote sensing, and global environmental change. Here, we thoroughly summarize the progresses of recent studies focusing on the characterization, distribution, sources, composition, and fate of CDOM in inland waters. Characterization methods, remote sensing estimation, and biogeochemistry cycle processes were the hotspots of CDOM studies. Specifically, optical, isotope, and mass spectrometric techniques have been widely used to characterize CDOM abundance, composition, and sources. Remote sensing is an effective tool to map CDOM distribution with high temporal and spatial resolutions. CDOM dynamics are mainly determined by watershed-related processes, including rainfall discharge, groundwater, wastewater discharges/effluents, and biogeochemical cycling occurring in soil and water bodies. We highlight the underlying mechanisms of the photochemical degradation and microbial decomposition of CDOM, and emphasize that photochemical and microbial processes of CDOM in inland waters accelerate nutrient cycling and regeneration in the water column and also exacerbate global warming by releasing greenhouse gases. Future study directions to improve the understanding of CDOM dynamics in inland waters are proposed. This review provides an interdisciplinary view and new insights on CDOM dynamics in inland waters.
AB - Chromophoric dissolved organic matter (CDOM) plays an important role in the biogeochemical cycle and energy flow of aquatic ecosystems. Thus, systematic and comprehensive understanding of CDOM dynamics is critically important for aquatic ecosystem management. CDOM spans multiple study fields, including analytical chemistry, biogeochemistry, water color remote sensing, and global environmental change. Here, we thoroughly summarize the progresses of recent studies focusing on the characterization, distribution, sources, composition, and fate of CDOM in inland waters. Characterization methods, remote sensing estimation, and biogeochemistry cycle processes were the hotspots of CDOM studies. Specifically, optical, isotope, and mass spectrometric techniques have been widely used to characterize CDOM abundance, composition, and sources. Remote sensing is an effective tool to map CDOM distribution with high temporal and spatial resolutions. CDOM dynamics are mainly determined by watershed-related processes, including rainfall discharge, groundwater, wastewater discharges/effluents, and biogeochemical cycling occurring in soil and water bodies. We highlight the underlying mechanisms of the photochemical degradation and microbial decomposition of CDOM, and emphasize that photochemical and microbial processes of CDOM in inland waters accelerate nutrient cycling and regeneration in the water column and also exacerbate global warming by releasing greenhouse gases. Future study directions to improve the understanding of CDOM dynamics in inland waters are proposed. This review provides an interdisciplinary view and new insights on CDOM dynamics in inland waters.
KW - Absorption coefficient
KW - Chromophoric dissolved organic matter
KW - Inland waters
KW - Microbial decomposition
KW - Remote sensing
UR - http://www.scopus.com/inward/record.url?scp=85096831086&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2020.143550
DO - 10.1016/j.scitotenv.2020.143550
M3 - Review
C2 - 33246724
AN - SCOPUS:85096831086
SN - 0048-9697
VL - 759
JO - Science of the Total Environment
JF - Science of the Total Environment
M1 - 143550
ER -