DOI: 10.1002/2015GB005332
Scopus记录号: 2-s2.0-84975748563
论文题名: Toward a quantitative and empirical dissolved organic carbon budget for the Gulf of Maine, a semienclosed shelf sea
作者: Balch W ; , Huntington T ; , Aiken G ; , Drapeau D ; , Bowler B ; , Lubelczyk L ; , Butler K
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 2 起始页码: 268
结束页码: 292
语种: 英语
英文关键词: colored dissolved organic matter
; dissolved organic carbon
; Gulf of Maine
; optical absorption
; optical scattering
Scopus关键词: absorption
; alga
; backscatter
; carbon budget
; concentration (composition)
; data acquisition
; dissolved organic carbon
; empirical analysis
; optical property
; particulate organic carbon
; plume
; primary production
; quantitative analysis
; regression analysis
; river discharge
; semienclosed sea
; shelf sea
; Atlantic Ocean
; Gulf of Maine
; Gulf of Saint Lawrence
; Kansas
; Lawrence
; Maine
; Portland [Maine]
; Scotia Shelf
; United States
; algae
英文摘要: A time series of organic carbon export from Gulf of Maine (GoM) watersheds was compared to a time series of biological, chemical, bio-optical, and hydrographic properties, measured across the GoM between Yarmouth, NS, Canada, and Portland, ME, U.S. Optical proxies were used to quantify the dissolved organic carbon (DOC) and particulate organic carbon in the GoM. The Load Estimator regression model applied to river discharge data demonstrated that riverine DOC export (and its decadal variance) has increased over the last 80 years. Several extraordinarily wet years (2006-2010) resulted in a massive pulse of chromophoric dissolved organic matter (CDOM; proxy for DOC) into the western GoM along with unidentified optically scattering material (<0.2 μm diameter). A survey of DOC in the GoM and Scotian Shelf showed the strong influence of the Gulf of Saint Lawrence on the DOC that enters the GoM. A deep plume of CDOM-rich water was observed near the coast of Maine which decreased in concentration eastward. The Forel-Ule color scale was derived and compared to the same measurements made in 1912-1913 by Henry Bigelow. Results show that the GoM has yellowed in the last century, particularly in the region of the extension of the Eastern Maine Coastal Current. Time lags between DOC discharge and its appearance in the GoM increased with distance from the river mouths. Algae were also a significant source of DOC but not CDOM. Gulf-wide algal primary production has decreased. Increases in precipitation and DOC discharge to the GoM are predicted over the next century. © 2016. The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77882
Appears in Collections: 气候变化事实与影响
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作者单位: Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States; U.S. Geological Survey, Augusta, ME, United States; U.S. Geological Survey, Boulder, CO, United States
Recommended Citation:
Balch W,, Huntington T,, Aiken G,et al. Toward a quantitative and empirical dissolved organic carbon budget for the Gulf of Maine, a semienclosed shelf sea[J]. Global Biogeochemical Cycles,2016-01-01,30(2)