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Simulated Impact of Glacial Runoff on CO 2 Uptake in the Gulf of Alaska
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2018
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Source: Geophysical Research Letters, 45(2), 880-890
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Journal Title:Geophysical Research Letters
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Description:The Gulf of Alaska (GOA) receives substantial summer freshwater runoff from glacial meltwater. The alkalinity of this runoff is highly dependent on the glacial source and can modify the coastal carbon cycle.We use a regional ocean biogeochemical model to simulate CO 2uptake in the GOA under different alkalinity-loading scenarios. The GOA is identi fied as a current net sink of carbon, though low-alkalinity tidewater glacial runoff suppresses summer coastal carbon uptake. Our model shows that increasing thealkalinity generates an increase in annual CO 2uptake of 1.9 –2.7 TgC/yr. This transition is comparable to a projected change in glacial runoff composition (i.e., from tidewater to land-terminating) due to continued
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Source:Geophysical Research Letters, 45(2), 880-890
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ISSN:0094-8276;1944-8007;
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Rights Information:Other
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