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| DOI | 10.5194/bg-21-1135-2024 |
| Insights into carbonate environmental conditions in the Chukchi Sea | |
| 发表日期 | 2024 |
| ISSN | 1726-4170 |
| EISSN | 1726-4189 |
| 起始页码 | 21 |
| 结束页码 | 5 |
| 卷号 | 21期号:5 |
| 英文摘要 | Healthy Arctic marine ecosystems are essential to the food security and sovereignty, culture, and wellbeing of Indigenous Peoples in the Arctic. At the same time, Arctic marine ecosystems are highly susceptible to impacts of climate change and ocean acidification. While increasing ocean and air temperatures and melting sea ice act as direct stressors on the ecosystem, they also indirectly enhance ocean acidification, accelerating the associated changes in the inorganic carbon system. Yet, much is to be learned about the current state and variability of the inorganic carbon system in remote, high-latitude oceans. Here, we present time series (2016-2020) of pH and the partial pressure of carbon dioxide (pCO(2)) from the northeast Chukchi Sea continental shelf. The Chukchi Ecosystem Observatory includes a suite of subsurface year-round moorings sited amid a biological hotspot that is characterized by high primary productivity and a rich benthic food web that in turn supports coastal I & ntilde;upiat, whales, ice seals, walrus (Odobenus rosmarus), and Arctic cod (Boreogadus saida). Our observations suggest that near-bottom waters (33 m depth, 13 m above the seafloor) are a high carbon dioxide and low pH and aragonite saturation state (Omega(arag)) environment in summer and fall, when organic material from the highly productive summer remineralizes. During this time, Omega(arag) can be as low as 0.4. In winter, when the site was covered by sea ice, pH was <8 and Omega(arag) remained undersaturated under the sea ice. There were only two short seasonal periods with relatively higher pH and Omega(arag), which we term ocean acidification relaxation events. In spring, high primary production from sea ice algae and phytoplankton blooms led to spikes in pH (pH > 8) and aragonite oversaturation. In late fall, strong wind-driven mixing events that delivered low-CO2 surface water to the shelf also led to events with elevated pH and Omega(arag). Given the recent observations of high rates of ocean acidification and a sudden and dramatic shift of the physical, biogeochemical, and ecosystem conditions in the Chukchi Sea, it is possible that the observed extreme conditions at the Chukchi Ecosystem Observatory are deviating from the carbonate conditions to which many species are adapted. |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| WOS类目 | Ecology ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001192129700001 |
| 来源期刊 | BIOGEOSCIENCES
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/291568 |
| 作者单位 | University of Alaska System; University of Alaska Fairbanks; University of Gothenburg; University of Alaska System; University of Alaska Fairbanks |
| 推荐引用方式 GB/T 7714 | . Insights into carbonate environmental conditions in the Chukchi Sea[J],2024,21(5). |
| APA | (2024).Insights into carbonate environmental conditions in the Chukchi Sea.BIOGEOSCIENCES,21(5). |
| MLA | "Insights into carbonate environmental conditions in the Chukchi Sea".BIOGEOSCIENCES 21.5(2024). |
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