Interactive comment on “Degradation state of organic matter in surface sediments from the Beaufort Shelf: a lipid approach” by J.-F. Rontani
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Comment: Arctic rivers and their estuaries are characterized by seasonal extremes; long ice cover, limited light conditions and a very strong seasonal signal in discharge, but also sediment, and POC/DOC fluxes. Even though many readers are probably familiar with this, it should be mentioned. It would be good to minimally add timing and amounts in discharge and delivered OM, and relate this to timing of sampling (August). Also, a description of prevailing currents in this region would be beneficial, and potential
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Interactive comment on “Degradation state of organic matter in surface sediments from the Beaufort Shelf: a lipid approach” by J.-F. Rontani
Comment: Questioning whether terrigenous material is refractory in deltaic and shelf environments may be relatively new (see discussion and references on page 3883), but the observation of a faster degradation rate for predominantly terrestrial sterols than predominantly marine sterols is not. Answer: Concerning the faster degradation rates of sitosterol and campesterol than brassicasterol obse...
متن کاملInteractive comment on “Degradation state of organic matter in surface sediments from the Beaufort Shelf: a lipid approach” by J.-F. Rontani
Comment: Questioning whether terrigenous material is refractory in deltaic and shelf environments may be relatively new (see discussion and references on page 3883), but the observation of a faster degradation rate for predominantly terrestrial sterols than predominantly marine sterols is not. Answer: Concerning the faster degradation rates of sitosterol and campesterol than brassicasterol obse...
متن کاملInteractive comment on “Degradation state of organic matter in surface sediments from the Beaufort Shelf: a lipid approach” by J.-F. Rontani
Rontani and coauthors here present a detailed lipid analyses on surface sediments off the Mackenzie River in Arctic Canada. They provide interesting insights into abiotic and biotic degradation processes by using (the degradation products of) a range of sterols and monounsaturated fatty acids in this environment. The authors appear knowledgeable in lipid chemistry and interpretation of lipid pa...
متن کاملInteractive comment on “Degradation state of organic matter in surface sediments from the Beaufort Shelf: a lipid approach” by J.-F. Rontani
Rontani and coauthors here present a detailed lipid analyses on surface sediments off the Mackenzie River in Arctic Canada. They provide interesting insights into abiotic and biotic degradation processes by using (the degradation products of) a range of sterols and monounsaturated fatty acids in this environment. The authors appear knowledgeable in lipid chemistry and interpretation of lipid pa...
متن کاملInteractive comment on “Degradation state of organic matter in surface sediments from the Beaufort Shelf: a lipid approach” by J.-F. Rontani
Comment: Arctic rivers and their estuaries are characterized by seasonal extremes; long ice cover, limited light conditions and a very strong seasonal signal in discharge, but also sediment, and POC/DOC fluxes. Even though many readers are probably familiar with this, it should be mentioned. It would be good to minimally add timing and amounts in discharge and delivered OM, and relate this to t...
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تاریخ انتشار 2012